Bump version

Remove FLEX_AT_LEAST_IOS13_SDK and usages. It was causing several issues being in a header that needed to be private but also included in public headers.

.github/FUNDING.yml

@@ -0,0 +1,3 @@
+# These are supported funding model platforms
+
+github: [NSExceptional]

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,27 @@
+---
+name: Bug report
+about: Report a bug in FLEX
+title: ''
+labels: bug
+assignees: ''
+
+---
+
+### Environment
+- Platform+version: **iOS 14** <!--- Change to match your platform and version -->
+- FLEX version: **9.9.9** <!--- Change to the version of FLEX you're using -->
+<!--- FLEXing / libFLEX users: please include FLEXing and libFLEX versions separately -->
+
+### Bug Report
+
+Here, you can provide a description of the bug. Some tips:
+
+- Please do not paste an entire crash log. Upload the crash log to something like [ghostbin.co](https://ghostbin.co/) or another paste service. Alternatively, you can cut out the relevant stack trace and paste that inside a ` ```code block``` `
+- If the bug is more complex than "this button is broken" or a crash, consider including a sample project. For example, if your app's requests aren't showing up in the network history page.
+- Providing steps to reproduce is always helpful!
+- If you want to include a screenshot or GIF, consider modifying the default markdown for uploaded images to use this code to make the image smaller on desktop:
+  ```
+  <img width="50%" src=your-image-url >
+  ```
+
+This template is a suggestion. You may format your issue however you want, but generally you should at least include your iOS version and FLEX version.

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,10 @@
+---
+name: Feature request
+about: Suggest a new feature for FLEX
+title: ''
+labels: enhancement
+assignees: ''
+
+---
+
+

.gitignore

@@ -17,3 +17,6 @@ DerivedData
 *.ipa
 *.xcuserstate
 .DS_Store
+/Example/Pods
+Podfile.lock
+IDEWorkspaceChecks.plist

Classes/Core/Controllers/FLEXFilteringTableViewController.h

@@ -0,0 +1,89 @@
+//
+//  FLEXFilteringTableViewController.h
+//  FLEX
+//
+//  Created by Tanner on 3/9/20.
+//  Copyright © 2020 FLEX Team. All rights reserved.
+//
+
+#import "FLEXTableViewController.h"
+
+#pragma mark - FLEXTableViewFiltering
+@protocol FLEXTableViewFiltering <FLEXSearchResultsUpdating>
+
+/// An array of visible, "filtered" sections. For example,
+/// if you have 3 sections in \c allSections and the user searches
+/// for something that matches rows in only one section, then
+/// this property would only contain that on matching section.
+@property (nonatomic, copy) NSArray<FLEXTableViewSection *> *sections;
+/// An array of all possible sections. Empty sections are to be removed
+/// and the resulting array stored in the \c section property. Setting
+/// this property should immediately set \c sections to \c nonemptySections 
+///
+/// Do not manually initialize this property, it will be
+/// initialized for you using the result of \c makeSections.
+@property (nonatomic, copy) NSArray<FLEXTableViewSection *> *allSections;
+
+/// This computed property should filter \c allSections for assignment to \c sections
+@property (nonatomic, readonly, copy) NSArray<FLEXTableViewSection *> *nonemptySections;
+
+/// This should be able to re-initialize \c allSections
+- (NSArray<FLEXTableViewSection *> *)makeSections;
+
+@end
+
+
+#pragma mark - FLEXFilteringTableViewController
+/// A table view which implements \c UITableView* methods using arrays of
+/// \c FLEXTableViewSection objects provied by a special delegate.
+@interface FLEXFilteringTableViewController : FLEXTableViewController <FLEXTableViewFiltering>
+
+/// Stores the current search query.
+@property (nonatomic, copy) NSString *filterText;
+
+/// This property is set to \c self by default.
+///
+/// This property is used to power almost all of the table view's data source
+/// and delegate methods automatically, including row and section filtering
+/// when the user searches, 3D Touch context menus, row selection, etc.
+///
+/// Setting this property will also set \c searchDelegate to that object.
+@property (nonatomic, weak) id<FLEXTableViewFiltering> filterDelegate;
+
+/// Defaults to \c NO. If enabled, all filtering will be done by calling
+/// \c onBackgroundQueue:thenOnMainQueue: with the UI updated on the main queue.
+@property (nonatomic) BOOL filterInBackground;
+
+/// Defaults to \c NO. If enabled, one • will be supplied as an index title for each section.
+@property (nonatomic) BOOL wantsSectionIndexTitles;
+
+/// Recalculates the non-empty sections and reloads the table view.
+///
+/// Subclasses may override to perform additional reloading logic,
+/// such as calling \c -reloadSections if needed. Be sure to call
+/// \c super after any logic that would affect the appearance of 
+/// the table view, since the table view is reloaded last.
+///
+/// Called at the end of this class's implementation of \c updateSearchResults:
+- (void)reloadData;
+
+/// Invoke this method to call \c -reloadData on each section
+/// in \c self.filterDelegate.allSections.
+- (void)reloadSections;
+
+#pragma mark FLEXTableViewFiltering
+
+@property (nonatomic, copy) NSArray<FLEXTableViewSection *> *sections;
+@property (nonatomic, copy) NSArray<FLEXTableViewSection *> *allSections;
+
+/// Subclasses can override to hide specific sections under certain conditions
+/// if using \c self as the \c filterDelegate, as is the default.
+///
+/// For example, the object explorer hides the description section when searching.
+@property (nonatomic, readonly, copy) NSArray<FLEXTableViewSection *> *nonemptySections;
+
+/// If using \c self as the \c filterDelegate, as is the default,
+/// subclasses should override to provide the sections for the table view.
+- (NSArray<FLEXTableViewSection *> *)makeSections;
+
+@end

Classes/Core/Controllers/FLEXFilteringTableViewController.m

@@ -0,0 +1,209 @@
+//
+//  FLEXFilteringTableViewController.m
+//  FLEX
+//
+//  Created by Tanner on 3/9/20.
+//  Copyright © 2020 FLEX Team. All rights reserved.
+//
+
+#import "FLEXFilteringTableViewController.h"
+#import "FLEXTableViewSection.h"
+#import "NSArray+FLEX.h"
+#import "FLEXMacros.h"
+
+@interface FLEXFilteringTableViewController ()
+
+@end
+
+@implementation FLEXFilteringTableViewController
+@synthesize allSections = _allSections;
+
+#pragma mark - View controller lifecycle
+
+- (void)loadView {
+    [super loadView];
+    
+    if (!self.filterDelegate) {
+        self.filterDelegate = self;
+    } else {
+        [self _registerCellsForReuse];
+    }
+}
+
+- (void)_registerCellsForReuse {
+    for (FLEXTableViewSection *section in self.filterDelegate.allSections) {
+        if (section.cellRegistrationMapping) {
+            [self.tableView registerCells:section.cellRegistrationMapping];
+        }
+    }
+}
+
+
+#pragma mark - Public
+
+- (void)setFilterDelegate:(id<FLEXTableViewFiltering>)filterDelegate {
+    _filterDelegate = filterDelegate;
+    filterDelegate.allSections = [filterDelegate makeSections];
+    
+    if (self.isViewLoaded) {
+        [self _registerCellsForReuse];
+    }
+}
+
+- (void)reloadData {
+    [self reloadData:self.nonemptySections];
+}
+
+- (void)reloadData:(NSArray *)nonemptySections {
+    // Recalculate displayed sections
+    self.filterDelegate.sections = nonemptySections;
+
+    // Refresh table view
+    if (self.isViewLoaded) {
+        [self.tableView reloadData];
+    }
+}
+
+- (void)reloadSections {
+    for (FLEXTableViewSection *section in self.filterDelegate.allSections) {
+        [section reloadData];
+    }
+}
+
+
+#pragma mark - Search
+
+- (void)updateSearchResults:(NSString *)newText {
+    NSArray *(^filter)() = ^NSArray *{
+        self.filterText = newText;
+
+        // Sections will adjust data based on this property
+        for (FLEXTableViewSection *section in self.filterDelegate.allSections) {
+            section.filterText = newText;
+        }
+        
+        return nil;
+    };
+    
+    if (self.filterInBackground) {
+        [self onBackgroundQueue:filter thenOnMainQueue:^(NSArray *unused) {
+            if ([self.searchText isEqualToString:newText]) {
+                [self reloadData];
+            }
+        }];
+    } else {
+        filter();
+        [self reloadData];
+    }
+}
+
+
+#pragma mark Filtering
+
+- (NSArray<FLEXTableViewSection *> *)nonemptySections {
+    return [self.filterDelegate.allSections flex_filtered:^BOOL(FLEXTableViewSection *section, NSUInteger idx) {
+        return section.numberOfRows > 0;
+    }];
+}
+
+- (NSArray<FLEXTableViewSection *> *)makeSections {
+    return @[];
+}
+
+- (void)setAllSections:(NSArray<FLEXTableViewSection *> *)allSections {
+    _allSections = allSections.copy;
+    // Only display nonempty sections
+    self.sections = self.nonemptySections;
+}
+
+- (void)setSections:(NSArray<FLEXTableViewSection *> *)sections {
+    // Allow sections to reload a portion of the table view at will
+    [sections enumerateObjectsUsingBlock:^(FLEXTableViewSection *s, NSUInteger idx, BOOL *stop) {
+        [s setTable:self.tableView section:idx];
+    }];
+    _sections = sections.copy;
+}
+
+
+#pragma mark - UITableViewDataSource
+
+- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
+    return self.filterDelegate.sections.count;
+}
+
+- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
+    return self.filterDelegate.sections[section].numberOfRows;
+}
+
+- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section {
+    return self.filterDelegate.sections[section].title;
+}
+
+- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
+    NSString *reuse = [self.filterDelegate.sections[indexPath.section] reuseIdentifierForRow:indexPath.row];
+    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:reuse forIndexPath:indexPath];
+    [self.filterDelegate.sections[indexPath.section] configureCell:cell forRow:indexPath.row];
+    return cell;
+}
+
+- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
+    return UITableViewAutomaticDimension;
+}
+
+- (NSArray<NSString *> *)sectionIndexTitlesForTableView:(UITableView *)tableView {
+    if (self.wantsSectionIndexTitles) {
+        return [NSArray flex_forEachUpTo:self.filterDelegate.sections.count map:^id(NSUInteger i) {
+            return @"⦁";
+        }];
+    }
+    
+    return nil;
+}
+
+
+#pragma mark - UITableViewDelegate
+
+- (BOOL)tableView:(UITableView *)tableView shouldHighlightRowAtIndexPath:(NSIndexPath *)indexPath {
+    return [self.filterDelegate.sections[indexPath.section] canSelectRow:indexPath.row];
+}
+
+- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
+    FLEXTableViewSection *section = self.filterDelegate.sections[indexPath.section];
+
+    void (^action)(UIViewController *) = [section didSelectRowAction:indexPath.row];
+    UIViewController *details = [section viewControllerToPushForRow:indexPath.row];
+
+    if (action) {
+        action(self);
+        [tableView deselectRowAtIndexPath:indexPath animated:YES];
+    } else if (details) {
+        [self.navigationController pushViewController:details animated:YES];
+    } else {
+        [NSException raise:NSInternalInconsistencyException
+                    format:@"Row is selectable but has no action or view controller"];
+    }
+}
+
+- (void)tableView:(UITableView *)tableView accessoryButtonTappedForRowWithIndexPath:(NSIndexPath *)indexPath {
+    [self.filterDelegate.sections[indexPath.section] didPressInfoButtonAction:indexPath.row](self);
+}
+
+- (UIContextMenuConfiguration *)tableView:(UITableView *)tableView contextMenuConfigurationForRowAtIndexPath:(NSIndexPath *)indexPath point:(CGPoint)point __IOS_AVAILABLE(13.0) {
+    FLEXTableViewSection *section = self.filterDelegate.sections[indexPath.section];
+    NSString *title = [section menuTitleForRow:indexPath.row];
+    NSArray<UIMenuElement *> *menuItems = [section menuItemsForRow:indexPath.row sender:self];
+    
+    if (menuItems.count) {
+        return [UIContextMenuConfiguration
+            configurationWithIdentifier:nil
+            previewProvider:nil
+            actionProvider:^UIMenu *(NSArray<UIMenuElement *> *suggestedActions) {
+                return [UIMenu menuWithTitle:title children:menuItems];
+            }
+        ];
+    }
+    
+    return nil;
+}
+
+@end

Classes/Core/Controllers/FLEXNavigationController.h

@@ -3,7 +3,7 @@
 //  FLEX
 //
 //  Created by Tanner on 1/30/20.
-//  Copyright © 2020 Flipboard. All rights reserved.
+//  Copyright © 2020 FLEX Team. All rights reserved.
 //
 
 #import <UIKit/UIKit.h>

Classes/Core/Controllers/FLEXNavigationController.m

@@ -3,10 +3,12 @@
 //  FLEX
 //
 //  Created by Tanner on 1/30/20.
-//  Copyright © 2020 Flipboard. All rights reserved.
+//  Copyright © 2020 FLEX Team. All rights reserved.
 //
 
 #import "FLEXNavigationController.h"
+#import "FLEXExplorerViewController.h"
+#import "FLEXTabList.h"
 
 @interface UINavigationController (Private) <UIGestureRecognizerDelegate>
 - (void)_gestureRecognizedInteractiveHide:(UIGestureRecognizer *)sender;
@@ -18,6 +20,9 @@
 @interface FLEXNavigationController ()
 @property (nonatomic, readonly) BOOL toolbarWasHidden;
 @property (nonatomic) BOOL waitingToAddTab;
+@property (nonatomic, readonly) BOOL canShowToolbar;
+@property (nonatomic) BOOL didSetupPendingDismissButtons;
+@property (nonatomic) UISwipeGestureRecognizer *navigationBarSwipeGesture;
 @end
 
 @implementation FLEXNavigationController
@@ -30,11 +35,149 @@
     [super viewDidLoad];
     
     self.waitingToAddTab = YES;
+    
+    // Add gesture to reveal toolbar if hidden
+    UITapGestureRecognizer *navbarTapGesture = [[UITapGestureRecognizer alloc]
+        initWithTarget:self action:@selector(handleNavigationBarTap:)
+    ];
+    
+    // Don't cancel touches to work around bug on versions of iOS prior to 13
+    navbarTapGesture.cancelsTouchesInView = NO;
+    [self.navigationBar addGestureRecognizer:navbarTapGesture];
+    
+    // Add gesture to dismiss if not presented with a sheet style
+    if (@available(iOS 13, *)) {
+        switch (self.modalPresentationStyle) {
+            case UIModalPresentationAutomatic:
+            case UIModalPresentationPageSheet:
+            case UIModalPresentationFormSheet:
+                break;
+                
+            default:
+                [self addNavigationBarSwipeGesture];
+                break;
+        }
+    } else {
+        [self addNavigationBarSwipeGesture];
+    }
+}
+
+- (void)viewWillAppear:(BOOL)animated {
+    [super viewWillAppear:animated];
+    
+    if (self.beingPresented && !self.didSetupPendingDismissButtons) {
+        for (UIViewController *vc in self.viewControllers) {
+            [self addNavigationBarItemsToViewController:vc.navigationItem];
+        }
+        
+        self.didSetupPendingDismissButtons = YES;
+    }
+}
+
+- (void)viewDidAppear:(BOOL)animated {
+    [super viewDidAppear:animated];
+    
+    if (self.waitingToAddTab) {
+        // Only add new tab if we're presented properly
+        if ([self.presentingViewController isKindOfClass:[FLEXExplorerViewController class]]) {
+            // New navigation controllers always add themselves as new tabs,
+            // tabs are closed by FLEXExplorerViewController
+            [FLEXTabList.sharedList addTab:self];
+            self.waitingToAddTab = NO;
+        }
+    }
+}
+
+- (void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated {
+    [super pushViewController:viewController animated:animated];
+    [self addNavigationBarItemsToViewController:viewController.navigationItem];
+}
+
+- (void)dismissAnimated {
+    // Tabs are only closed if the done button is pressed; this
+    // allows you to leave a tab open by dragging down to dismiss
+    [FLEXTabList.sharedList closeTab:self];
+    [self.presentingViewController dismissViewControllerAnimated:YES completion:nil];
+}
+
+- (BOOL)canShowToolbar {
+    return self.topViewController.toolbarItems.count;
+}
+
+- (void)addNavigationBarItemsToViewController:(UINavigationItem *)navigationItem {
+    if (!self.presentingViewController) {
+        return;
+    }
+    
+    // Check if a done item already exists
+    for (UIBarButtonItem *item in navigationItem.rightBarButtonItems) {
+        if (item.style == UIBarButtonItemStyleDone) {
+            return;
+        }
+    }
+    
+    // Give root view controllers a Done button if it does not already have one
+    UIBarButtonItem *done = [[UIBarButtonItem alloc]
+        initWithBarButtonSystemItem:UIBarButtonSystemItemDone
+        target:self
+        action:@selector(dismissAnimated)
+    ];
+    
+    // Prepend the button if other buttons exist already
+    NSArray *existingItems = navigationItem.rightBarButtonItems;
+    if (existingItems.count) {
+        navigationItem.rightBarButtonItems = [@[done] arrayByAddingObjectsFromArray:existingItems];
+    } else {
+        navigationItem.rightBarButtonItem = done;
+    }
+    
+    // Keeps us from calling this method again on
+    // the same view controllers in -viewWillAppear:
+    self.didSetupPendingDismissButtons = YES;
+}
+
+- (void)addNavigationBarSwipeGesture {
+    UISwipeGestureRecognizer *swipe = [[UISwipeGestureRecognizer alloc]
+        initWithTarget:self action:@selector(handleNavigationBarSwipe:)
+    ];
+    swipe.direction = UISwipeGestureRecognizerDirectionDown;
+    swipe.delegate = self;
+    self.navigationBarSwipeGesture = swipe;
+    [self.navigationBar addGestureRecognizer:swipe];
+}
+
+- (void)handleNavigationBarSwipe:(UISwipeGestureRecognizer *)sender {
+    if (sender.state == UIGestureRecognizerStateRecognized) {
+        [self.presentingViewController dismissViewControllerAnimated:YES completion:nil];
+    }
+}
+     
+- (void)handleNavigationBarTap:(UIGestureRecognizer *)sender {
+    // Don't reveal the toolbar if we were just tapping a button
+    CGPoint location = [sender locationInView:self.navigationBar];
+    UIView *hitView = [self.navigationBar hitTest:location withEvent:nil];
+    if ([hitView isKindOfClass:[UIControl class]]) {
+        return;
+    }
+
+    if (sender.state == UIGestureRecognizerStateRecognized) {
+        if (self.toolbarHidden && self.canShowToolbar) {
+            [self setToolbarHidden:NO animated:YES];
+        }
+    }
+}
+
+- (BOOL)gestureRecognizer:(UIGestureRecognizer *)g1 shouldBeRequiredToFailByGestureRecognizer:(UIGestureRecognizer *)g2 {
+    if (g1 == self.navigationBarSwipeGesture && g2 == self.barHideOnSwipeGestureRecognizer) {
+        return YES;
+    }
+    
+    return NO;
 }
 
 - (void)_gestureRecognizedInteractiveHide:(UIPanGestureRecognizer *)sender {
     if (sender.state == UIGestureRecognizerStateRecognized) {
-        BOOL show = self.topViewController.toolbarItems.count;
+        BOOL show = self.canShowToolbar;
         CGFloat yTranslation = [sender translationInView:self.view].y;
         CGFloat yVelocity = [sender velocityInView:self.view].y;
         if (yVelocity > 2000) {

Classes/Core/Controllers/FLEXTableViewController.h

@@ -3,11 +3,12 @@
 //  FLEX
 //
 //  Created by Tanner on 7/5/19.
-//  Copyright © 2019 Flipboard. All rights reserved.
+//  Copyright © 2020 FLEX Team. All rights reserved.
 //
 
 #import <UIKit/UIKit.h>
-@class FLEXScopeCarousel, FLEXWindow;
+#import "FLEXTableView.h"
+@class FLEXScopeCarousel, FLEXWindow, FLEXTableViewSection;
 
 typedef CGFloat FLEXDebounceInterval;
 /// No delay, all events delivered
@@ -20,19 +21,34 @@ extern CGFloat const kFLEXDebounceForAsyncSearch;
 extern CGFloat const kFLEXDebounceForExpensiveIO;
 
 @protocol FLEXSearchResultsUpdating <NSObject>
+/// A method to handle search query update events.
+///
+/// \c searchBarDebounceInterval is used to reduce the frequency at which this
+/// method is called. This method is also called when the search bar becomes
+/// the first responder, and when the selected search bar scope index changes.
 - (void)updateSearchResults:(NSString *)newText;
 @end
 
 @interface FLEXTableViewController : UITableViewController <
-    UISearchResultsUpdating, UISearchControllerDelegate,
-    UISearchBarDelegate, FLEXSearchResultsUpdating
+    UISearchResultsUpdating, UISearchControllerDelegate, UISearchBarDelegate
 >
 
 /// A grouped table view. Inset on iOS 13.
 ///
-/// Simply calls into initWithStyle:
+/// Simply calls into \c initWithStyle:
 - (id)init;
 
+/// Subclasses may override to configure the controller before \c viewDidLoad:
+- (id)initWithStyle:(UITableViewStyle)style;
+
+@property (nonatomic) FLEXTableView *tableView;
+
+/// If your subclass conforms to \c FLEXSearchResultsUpdating
+/// then this property is assigned to \c self automatically.
+///
+/// Setting \c filterDelegate will also set this property to that object.
+@property (nonatomic, weak) id<FLEXSearchResultsUpdating> searchDelegate;
+
 /// Defaults to NO.
 ///
 /// Setting this to YES will initialize the carousel and the view.
@@ -51,6 +67,10 @@ extern CGFloat const kFLEXDebounceForExpensiveIO;
 /// Setting this to YES will make the search bar appear whenever the view appears.
 /// Otherwise, iOS will only show the search bar when you scroll up.
 @property (nonatomic) BOOL showSearchBarInitially;
+/// Defaults to NO.
+///
+/// Setting this to YES will make the search bar activate whenever the view appears.
+@property (nonatomic) BOOL activatesSearchBarAutomatically;
 
 /// nil unless showsSearchBar is set to YES.
 ///
@@ -73,7 +93,7 @@ extern CGFloat const kFLEXDebounceForExpensiveIO;
 /// or it will not be respsected. Use this instead.
 /// Defaults to NO.
 @property (nonatomic) BOOL pinSearchBar;
-/// By default, we will show the search bar's cancel button when 
+/// By default, we will show the search bar's cancel button when
 /// search becomes active and hide it when search is dismissed.
 ///
 /// Do not set the showsCancelButton property on the searchController's
@@ -86,24 +106,48 @@ extern CGFloat const kFLEXDebounceForExpensiveIO;
 /// Otherwise, this is the selected index of the carousel, or NSNotFound if using neither.
 @property (nonatomic) NSInteger selectedScope;
 /// self.searchController.searchBar.text
-@property (nonatomic, readonly) NSString *searchText;
+@property (nonatomic, readonly, copy) NSString *searchText;
 
 /// A totally optional delegate to forward search results updater calls to.
-/// If a delegate is set, updateSearchResults: is not called on this view controller. 
-@property (nonatomic, weak    ) id<FLEXSearchResultsUpdating> searchResultsUpdater;
+/// If a delegate is set, updateSearchResults: is not called on this view controller.
+@property (nonatomic, weak) id<FLEXSearchResultsUpdating> searchResultsUpdater;
 
 /// self.view.window as a \c FLEXWindow
 @property (nonatomic, readonly) FLEXWindow *window;
 
-/// Subclasses should override to handle search query update events.
-///
-/// searchBarDebounceInterval is used to reduce the frequency at which this method is called.
-/// This method is also called when the search bar becomes the first responder,
-/// and when the selected search bar scope index changes.
-- (void)updateSearchResults:(NSString *)newText;
-
 /// Convenient for doing some async processor-intensive searching
 /// in the background before updating the UI back on the main queue.
 - (void)onBackgroundQueue:(NSArray *(^)(void))backgroundBlock thenOnMainQueue:(void(^)(NSArray *))mainBlock;
 
+/// Adds up to 3 additional items to the toolbar in right-to-left order.
+///
+/// That is, the first item in the given array will be the rightmost item behind
+/// any existing toolbar items. By default, buttons for bookmarks and tabs are shown.
+///
+/// If you wish to have more control over how the buttons are arranged or which
+/// buttons are displayed, you can access the properties for the pre-existing
+/// toolbar items directly and manually set \c self.toolbarItems by overriding
+/// the \c setupToolbarItems method below.
+- (void)addToolbarItems:(NSArray<UIBarButtonItem *> *)items;
+
+/// Subclasses may override. You should not need to call this method directly.
+- (void)setupToolbarItems;
+
+@property (nonatomic, readonly) UIBarButtonItem *shareToolbarItem;
+@property (nonatomic, readonly) UIBarButtonItem *bookmarksToolbarItem;
+@property (nonatomic, readonly) UIBarButtonItem *openTabsToolbarItem;
+
+/// Whether or not to display the "share" icon in the middle of the toolbar. NO by default.
+///
+/// Turning this on after you have added custom toolbar items will
+/// push off the leftmost toolbar item and shift the others leftward.
+@property (nonatomic) BOOL showsShareToolbarItem;
+/// Called when the share button is pressed.
+/// Default implementation does nothign. Subclasses may override.
+- (void)shareButtonPressed:(UIBarButtonItem *)sender;
+
+/// Subclasses may call this to opt-out of all toolbar related behavior.
+/// This is necessary if you want to disable the gesture which reveals the toolbar.
+- (void)disableToolbar;
+
 @end

Classes/Core/Controllers/FLEXTableViewController.m

@@ -3,13 +3,18 @@
 //  FLEX
 //
 //  Created by Tanner on 7/5/19.
-//  Copyright © 2019 Flipboard. All rights reserved.
+//  Copyright © 2020 FLEX Team. All rights reserved.
 //
 
 #import "FLEXTableViewController.h"
+#import "FLEXExplorerViewController.h"
+#import "FLEXBookmarksViewController.h"
+#import "FLEXTabsViewController.h"
 #import "FLEXScopeCarousel.h"
 #import "FLEXTableView.h"
 #import "FLEXUtility.h"
+#import "FLEXResources.h"
+#import "UIBarButtonItem+FLEX.h"
 #import <objc/runtime.h>
 
 @interface Block : NSObject
@@ -26,25 +31,31 @@ CGFloat const kFLEXDebounceForExpensiveIO = 0.5;
 @property (nonatomic) BOOL didInitiallyRevealSearchBar;
 @property (nonatomic) UITableViewStyle style;
 
+@property (nonatomic) BOOL hasAppeared;
 @property (nonatomic, readonly) UIView *tableHeaderViewContainer;
+
+@property (nonatomic, readonly) BOOL manuallyDeactivateSearchOnDisappear;
+
+@property (nonatomic) UIBarButtonItem *middleToolbarItem;
+@property (nonatomic) UIBarButtonItem *middleLeftToolbarItem;
+@property (nonatomic) UIBarButtonItem *leftmostToolbarItem;
 @end
 
 @implementation FLEXTableViewController
+@dynamic tableView;
+@synthesize showsShareToolbarItem = _showsShareToolbarItem;
 @synthesize tableHeaderViewContainer = _tableHeaderViewContainer;
 @synthesize automaticallyShowsSearchBarCancelButton = _automaticallyShowsSearchBarCancelButton;
 
-#pragma mark - Public
+#pragma mark - Initialization
 
 - (id)init {
-#if FLEX_AT_LEAST_IOS13_SDK
     if (@available(iOS 13.0, *)) {
         self = [self initWithStyle:UITableViewStyleInsetGrouped];
     } else {
         self = [self initWithStyle:UITableViewStyleGrouped];
     }
-#else
-    self = [self initWithStyle:UITableViewStyleGrouped];
-#endif
+    
     return self;
 }
 
@@ -55,11 +66,22 @@ CGFloat const kFLEXDebounceForExpensiveIO = 0.5;
         _searchBarDebounceInterval = kFLEXDebounceFast;
         _showSearchBarInitially = YES;
         _style = style;
+        _manuallyDeactivateSearchOnDisappear = ({
+            NSProcessInfo.processInfo.operatingSystemVersion.majorVersion < 11;
+        });
+        
+        // We will be our own search delegate if we implement this method
+        if ([self respondsToSelector:@selector(updateSearchResults:)]) {
+            self.searchDelegate = (id)self;
+        }
     }
     
     return self;
 }
 
+
+#pragma mark - Public
+
 - (FLEXWindow *)window {
     return (id)self.view.window;
 }
@@ -81,11 +103,9 @@ CGFloat const kFLEXDebounceForExpensiveIO = 0.5;
 
         self.automaticallyShowsSearchBarCancelButton = YES;
 
-        #if FLEX_AT_LEAST_IOS13_SDK
         if (@available(iOS 13, *)) {
             self.searchController.automaticallyShowsScopeBar = NO;
         }
-        #endif
         
         [self addSearchController:self.searchController];
     } else {
@@ -99,18 +119,15 @@ CGFloat const kFLEXDebounceForExpensiveIO = 0.5;
     _showsCarousel = showsCarousel;
     
     if (showsCarousel) {
-        _carousel = ({
-            __weak __typeof(self) weakSelf = self;
-
+        _carousel = ({ weakify(self)
+            
             FLEXScopeCarousel *carousel = [FLEXScopeCarousel new];
-            carousel.selectedIndexChangedAction = ^(NSInteger idx) {
-                __typeof(self) self = weakSelf;
-                [self updateSearchResults:self.searchText];
+            carousel.selectedIndexChangedAction = ^(NSInteger idx) { strongify(self);
+                [self.searchDelegate updateSearchResults:self.searchText];
             };
 
             // UITableView won't update the header size unless you reset the header view
-            [carousel registerBlockForDynamicTypeChanges:^(FLEXScopeCarousel *carousel) {
-                __typeof(self) self = weakSelf;
+            [carousel registerBlockForDynamicTypeChanges:^(FLEXScopeCarousel *_) { strongify(self);
                 [self layoutTableHeaderIfNeeded];
             }];
 
@@ -129,7 +146,7 @@ CGFloat const kFLEXDebounceForExpensiveIO = 0.5;
     } else if (self.showsCarousel) {
         return self.carousel.selectedIndex;
     } else {
-        return NSNotFound;
+        return 0;
     }
 }
 
@@ -140,7 +157,7 @@ CGFloat const kFLEXDebounceForExpensiveIO = 0.5;
         self.carousel.selectedIndex = selectedScope;
     }
 
-    [self updateSearchResults:self.searchText];
+    [self.searchDelegate updateSearchResults:self.searchText];
 }
 
 - (NSString *)searchText {
@@ -148,27 +165,21 @@ CGFloat const kFLEXDebounceForExpensiveIO = 0.5;
 }
 
 - (BOOL)automaticallyShowsSearchBarCancelButton {
-#if FLEX_AT_LEAST_IOS13_SDK
     if (@available(iOS 13, *)) {
         return self.searchController.automaticallyShowsCancelButton;
     }
-#endif
 
     return _automaticallyShowsSearchBarCancelButton;
 }
 
 - (void)setAutomaticallyShowsSearchBarCancelButton:(BOOL)value {
-#if FLEX_AT_LEAST_IOS13_SDK
     if (@available(iOS 13, *)) {
         self.searchController.automaticallyShowsCancelButton = value;
     }
-#endif
 
     _automaticallyShowsSearchBarCancelButton = value;
 }
 
-- (void)updateSearchResults:(NSString *)newText { }
-
 - (void)onBackgroundQueue:(NSArray *(^)(void))backgroundBlock thenOnMainQueue:(void(^)(NSArray *))mainBlock {
     dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
         NSArray *items = backgroundBlock();
@@ -178,18 +189,48 @@ CGFloat const kFLEXDebounceForExpensiveIO = 0.5;
     });
 }
 
+- (void)setsShowsShareToolbarItem:(BOOL)showsShareToolbarItem {
+    _showsShareToolbarItem = showsShareToolbarItem;
+    if (self.isViewLoaded) {
+        [self setupToolbarItems];
+    }
+}
+
+- (void)disableToolbar {
+    self.navigationController.toolbarHidden = YES;
+    self.navigationController.hidesBarsOnSwipe = NO;
+    self.toolbarItems = nil;
+}
+
+
 #pragma mark - View Controller Lifecycle
 
 - (void)loadView {
     self.view = [FLEXTableView style:self.style];
     self.tableView.dataSource = self;
     self.tableView.delegate = self;
+    
+    _shareToolbarItem = FLEXBarButtonItemSystem(Action, self, @selector(shareButtonPressed:));
+    _bookmarksToolbarItem = [UIBarButtonItem
+        flex_itemWithImage:FLEXResources.bookmarksIcon target:self action:@selector(showBookmarks)
+    ];
+    _openTabsToolbarItem = [UIBarButtonItem
+        flex_itemWithImage:FLEXResources.openTabsIcon target:self action:@selector(showTabSwitcher)
+    ];
+    
+    self.leftmostToolbarItem = UIBarButtonItem.flex_fixedSpace;
+    self.middleLeftToolbarItem = UIBarButtonItem.flex_fixedSpace;
+    self.middleToolbarItem = UIBarButtonItem.flex_fixedSpace;
 }
 
 - (void)viewDidLoad {
     [super viewDidLoad];
     
     self.tableView.keyboardDismissMode = UIScrollViewKeyboardDismissModeOnDrag;
+    
+    // Toolbar
+    self.navigationController.toolbarHidden = self.toolbarItems.count > 0;
+    self.navigationController.hidesBarsOnSwipe = YES;
 
     // On iOS 13, the root view controller shows it's search bar no matter what.
     // Turning this off avoids some weird flash the navigation bar does when we
@@ -203,20 +244,22 @@ CGFloat const kFLEXDebounceForExpensiveIO = 0.5;
     }
 }
 
-- (void)viewWillLayoutSubviews {
-    [super viewWillLayoutSubviews];
-    
-}
-
 - (void)viewWillAppear:(BOOL)animated {
     [super viewWillAppear:animated];
     
-    // When going back, make the search bar reappear instead of hiding
     if (@available(iOS 11.0, *)) {
+        // When going back, make the search bar reappear instead of hiding
         if ((self.pinSearchBar || self.showSearchBarInitially) && !self.didInitiallyRevealSearchBar) {
             self.navigationItem.hidesSearchBarWhenScrolling = NO;
         }
     }
+    
+    // Make the keyboard seem to appear faster
+    if (self.activatesSearchBarAutomatically) {
+        [self makeKeyboardAppearNow];
+    }
+
+    [self setupToolbarItems];
 }
 
 - (void)viewDidAppear:(BOOL)animated {
@@ -236,18 +279,122 @@ CGFloat const kFLEXDebounceForExpensiveIO = 0.5;
             }];
         }
     }
+    
+    if (self.activatesSearchBarAutomatically) {
+        // Keyboard has appeared, now we call this as we soon present our search bar
+        [self removeDummyTextField];
+        
+        // Activate the search bar
+        dispatch_async(dispatch_get_main_queue(), ^{
+            // This doesn't work unless it's wrapped in this dispatch_async call
+            [self.searchController.searchBar becomeFirstResponder];
+        });
+    }
 
     // We only want to reveal the search bar when the view controller first appears.
     self.didInitiallyRevealSearchBar = YES;
 }
 
-- (void)willMoveToParentViewController:(UIViewController *)parent {
-    [super willMoveToParentViewController:parent];
+- (void)viewWillDisappear:(BOOL)animated {
+    [super viewWillDisappear:animated];
+    
+    if (self.manuallyDeactivateSearchOnDisappear && self.searchController.isActive) {
+        self.searchController.active = NO;
+    }
+}
+
+- (void)didMoveToParentViewController:(UIViewController *)parent {
+    [super didMoveToParentViewController:parent];
     // Reset this since we are re-appearing under a new
     // parent view controller and need to show it again
     self.didInitiallyRevealSearchBar = NO;
 }
 
+
+#pragma mark - Toolbar, Public
+
+- (void)setupToolbarItems {
+    if (!self.isViewLoaded) {
+        return;
+    }
+    
+    self.toolbarItems = @[
+        self.leftmostToolbarItem,
+        UIBarButtonItem.flex_flexibleSpace,
+        self.middleLeftToolbarItem,
+        UIBarButtonItem.flex_flexibleSpace,
+        self.middleToolbarItem,
+        UIBarButtonItem.flex_flexibleSpace,
+        self.bookmarksToolbarItem,
+        UIBarButtonItem.flex_flexibleSpace,
+        self.openTabsToolbarItem,
+    ];
+    
+    for (UIBarButtonItem *item in self.toolbarItems) {
+        [item _setWidth:60];
+        // This does not work for anything but fixed spaces for some reason
+        // item.width = 60;
+    }
+    
+    // Disable tabs entirely when not presented by FLEXExplorerViewController
+    UIViewController *presenter = self.navigationController.presentingViewController;
+    if (![presenter isKindOfClass:[FLEXExplorerViewController class]]) {
+        self.openTabsToolbarItem.enabled = NO;
+    }
+}
+
+- (void)addToolbarItems:(NSArray<UIBarButtonItem *> *)items {
+    if (self.showsShareToolbarItem) {
+        // Share button is in the middle, skip middle button
+        if (items.count > 0) {
+            self.middleLeftToolbarItem = items[0];
+        }
+        if (items.count > 1) {
+            self.leftmostToolbarItem = items[1];
+        }
+    } else {
+        // Add buttons right-to-left
+        if (items.count > 0) {
+            self.middleToolbarItem = items[0];
+        }
+        if (items.count > 1) {
+            self.middleLeftToolbarItem = items[1];
+        }
+        if (items.count > 2) {
+            self.leftmostToolbarItem = items[2];
+        }
+    }
+    
+    [self setupToolbarItems];
+}
+
+- (void)setShowsShareToolbarItem:(BOOL)showShare {
+    if (_showsShareToolbarItem != showShare) {
+        _showsShareToolbarItem = showShare;
+        
+        if (showShare) {
+            // Push out leftmost item
+            self.leftmostToolbarItem = self.middleLeftToolbarItem;
+            self.middleLeftToolbarItem = self.middleToolbarItem;
+            
+            // Use share for middle
+            self.middleToolbarItem = self.shareToolbarItem;
+        } else {
+            // Remove share, shift custom items rightward
+            self.middleToolbarItem = self.middleLeftToolbarItem;
+            self.middleLeftToolbarItem = self.leftmostToolbarItem;
+            self.leftmostToolbarItem = UIBarButtonItem.flex_fixedSpace;
+        }
+    }
+    
+    [self setupToolbarItems];
+}
+
+- (void)shareButtonPressed:(UIBarButtonItem *)sender {
+
+}
+
+
 #pragma mark - Private
 
 - (void)debounce:(void(^)(void))block {
@@ -270,7 +417,6 @@ CGFloat const kFLEXDebounceForExpensiveIO = 0.5;
     }
     
     self.tableView.tableHeaderView = self.tableView.tableHeaderView;
-    [self.tableView layoutIfNeeded];
 }
 
 - (void)addCarousel:(FLEXScopeCarousel *)carousel {
@@ -366,8 +512,47 @@ CGFloat const kFLEXDebounceForExpensiveIO = 0.5;
     return _tableHeaderViewContainer;
 }
 
+- (void)showBookmarks {
+    UINavigationController *nav = [[UINavigationController alloc]
+        initWithRootViewController:[FLEXBookmarksViewController new]
+    ];
+    [self presentViewController:nav animated:YES completion:nil];
+}
+
+- (void)showTabSwitcher {
+    UINavigationController *nav = [[UINavigationController alloc]
+        initWithRootViewController:[FLEXTabsViewController new]
+    ];
+    [self presentViewController:nav animated:YES completion:nil];
+}
+
+
 #pragma mark - Search Bar
 
+#pragma mark Faster keyboard
+
+static UITextField *kDummyTextField = nil;
+
+/// Make the keyboard appear instantly. We use this to make the
+/// keyboard appear faster when the search bar is set to appear initially.
+/// You must call \c -removeDummyTextField before your search bar is to appear.
+- (void)makeKeyboardAppearNow {
+    if (!kDummyTextField) {
+        kDummyTextField = [UITextField new];
+        kDummyTextField.autocorrectionType = UITextAutocorrectionTypeNo;
+    }
+    
+    kDummyTextField.inputAccessoryView = self.searchController.searchBar.inputAccessoryView;
+    [UIApplication.sharedApplication.keyWindow addSubview:kDummyTextField];
+    [kDummyTextField becomeFirstResponder];
+}
+
+- (void)removeDummyTextField {
+    if (kDummyTextField.superview) {
+        [kDummyTextField removeFromSuperview];
+    }
+}
+
 #pragma mark UISearchResultsUpdating
 
 - (void)updateSearchResultsForSearchController:(UISearchController *)searchController {
@@ -378,7 +563,7 @@ CGFloat const kFLEXDebounceForExpensiveIO = 0.5;
         if (self.searchResultsUpdater) {
             [self.searchResultsUpdater updateSearchResults:text];
         } else {
-            [self updateSearchResults:text];
+            [self.searchDelegate updateSearchResults:text];
         }
     };
     
@@ -391,6 +576,7 @@ CGFloat const kFLEXDebounceForExpensiveIO = 0.5;
     }
 }
 
+
 #pragma mark UISearchControllerDelegate
 
 - (void)willPresentSearchController:(UISearchController *)searchController {
@@ -407,6 +593,7 @@ CGFloat const kFLEXDebounceForExpensiveIO = 0.5;
     }
 }
 
+
 #pragma mark UISearchBarDelegate
 
 /// Not necessary in iOS 13; remove this when iOS 13 is the deployment target
@@ -414,7 +601,8 @@ CGFloat const kFLEXDebounceForExpensiveIO = 0.5;
     [self updateSearchResultsForSearchController:self.searchController];
 }
 
-#pragma mark Table view
+
+#pragma mark Table View
 
 /// Not having a title in the first section looks weird with a rounded-corner table view style
 - (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section {

Classes/Core/FLEXSingleRowSection.h

@@ -3,7 +3,7 @@
 //  FLEX
 //
 //  Created by Tanner Bennett on 9/25/19.
-//  Copyright © 2019 Flipboard. All rights reserved.
+//  Copyright © 2020 FLEX Team. All rights reserved.
 //
 
 #import "FLEXTableViewSection.h"

Classes/Core/FLEXSingleRowSection.m

@@ -3,7 +3,7 @@
 //  FLEX
 //
 //  Created by Tanner Bennett on 9/25/19.
-//  Copyright © 2019 Flipboard. All rights reserved.
+//  Copyright © 2020 FLEX Team. All rights reserved.
 //
 
 #import "FLEXSingleRowSection.h"

Classes/Core/FLEXTableViewSection.h

@@ -3,10 +3,11 @@
 //  FLEX
 //
 //  Created by Tanner on 1/29/20.
-//  Copyright © 2020 Flipboard. All rights reserved.
+//  Copyright © 2020 FLEX Team. All rights reserved.
 //
 
-#import "FLEXUtility.h"
+#import <UIKit/UIKit.h>
+#import "NSArray+FLEX.h"
 @class FLEXTableView;
 
 NS_ASSUME_NONNULL_BEGIN
@@ -22,13 +23,17 @@ NS_ASSUME_NONNULL_BEGIN
     @protected
     /// Unused by default, use if you want
     NSString *_title;
+    
+    @private
+    __weak UITableView *_tableView;
+    NSInteger _sectionIndex;
 }
 
 #pragma mark - Data
 
 /// A title to be displayed for the custom section.
 /// Subclasses may override or use the \c _title ivar.
-@property (nonatomic, readonly, nullable) NSString *title;
+@property (nonatomic, readonly, nullable, copy) NSString *title;
 /// The number of rows in this section. Subclasses must override.
 /// This should not change until \c filterText is changed or \c reloadData is called.
 @property (nonatomic, readonly) NSInteger numberOfRows;
@@ -55,6 +60,17 @@ NS_ASSUME_NONNULL_BEGIN
 /// \c setFilterText: to call \c super and call \c reloadData.
 - (void)reloadData;
 
+/// Like \c reloadData, but optionally reloads the table view section
+/// associated with this section object, if any. Do not override.
+/// Do not call outside of the main thread.
+- (void)reloadData:(BOOL)updateTable;
+
+/// Provide a table view and section index to allow the section to efficiently reload
+/// its own section of the table when something changes it. The table reference is
+/// held weakly, and subclasses cannot access it or the index. Call this method again
+/// if the section numbers have changed since you last called it.
+- (void)setTable:(UITableView *)tableView section:(NSInteger)index;
+
 #pragma mark - Row Selection
 
 /// Whether the given row should be selectable, such as if tapping the cell
@@ -84,7 +100,6 @@ NS_ASSUME_NONNULL_BEGIN
 - (nullable void(^)(__kindof UIViewController *host))didPressInfoButtonAction:(NSInteger)row;
 
 #pragma mark - Context Menus
-#if FLEX_AT_LEAST_IOS13_SDK
 
 /// By default, this is the title of the row.
 /// @return The title of the context menu, if any.
@@ -104,7 +119,6 @@ NS_ASSUME_NONNULL_BEGIN
 /// should be a description of what will be copied, and the values should be
 /// the strings to copy. Return an empty string as a value to show a disabled action.
 - (nullable NSArray<NSString *> *)copyMenuItemsForRow:(NSInteger)row API_AVAILABLE(ios(13.0));
-#endif
 
 #pragma mark - Cell Configuration
 

Classes/Core/FLEXTableViewSection.m

@@ -3,11 +3,12 @@
 //  FLEX
 //
 //  Created by Tanner on 1/29/20.
-//  Copyright © 2020 Flipboard. All rights reserved.
+//  Copyright © 2020 FLEX Team. All rights reserved.
 //
 
 #import "FLEXTableViewSection.h"
 #import "FLEXTableView.h"
+#import "FLEXUtility.h"
 #import "UIMenu+FLEX.h"
 
 #pragma clang diagnostic push
@@ -21,6 +22,19 @@
 
 - (void)reloadData { }
 
+- (void)reloadData:(BOOL)updateTable {
+    [self reloadData];
+    if (updateTable) {
+        NSIndexSet *index = [NSIndexSet indexSetWithIndex:_sectionIndex];
+        [_tableView reloadSections:index withRowAnimation:UITableViewRowAnimationNone];
+    }
+}
+
+- (void)setTable:(UITableView *)tableView section:(NSInteger)index {
+    _tableView = tableView;
+    _sectionIndex = index;
+}
+
 - (NSDictionary<NSString *,Class> *)cellRegistrationMapping {
     return nil;
 }
@@ -50,8 +64,6 @@
     return kFLEXDefaultCell;
 }
 
-#if FLEX_AT_LEAST_IOS13_SDK
-
 - (NSString *)menuTitleForRow:(NSInteger)row {
     NSString *title = [self titleForRow:row];
     NSString *subtitle = [self menuSubtitleForRow:row];
@@ -67,7 +79,7 @@
     return @"";
 }
 
-- (NSArray<UIMenuElement *> *)menuItemsForRow:(NSInteger)row sender:(UIViewController *)sender {
+- (NSArray<UIMenuElement *> *)menuItemsForRow:(NSInteger)row sender:(UIViewController *)sender API_AVAILABLE(ios(13)) {
     NSArray<NSString *> *copyItems = [self copyMenuItemsForRow:row];
     NSAssert(copyItems.count % 2 == 0, @"copyMenuItemsForRow: should return an even list");
     
@@ -98,13 +110,13 @@
         }
         
         UIMenu *copyMenu = [UIMenu
-            inlineMenuWithTitle:@"Copy…" 
+            flex_inlineMenuWithTitle:@"Copy…" 
             image:copyIcon
             children:actions
         ];
         
         if (collapseMenu) {
-            return @[[copyMenu collapsed]];
+            return @[[copyMenu flex_collapsed]];
         } else {
             return @[copyMenu];
         }
@@ -113,8 +125,6 @@
     return @[];
 }
 
-#endif
-
 - (NSArray<NSString *> *)copyMenuItemsForRow:(NSInteger)row {
     return nil;
 }

Classes/Core/Views/Carousel/FLEXCarouselCell.h

@@ -3,7 +3,7 @@
 //  FLEX
 //
 //  Created by Tanner Bennett on 7/17/19.
-//  Copyright © 2019 Flipboard. All rights reserved.
+//  Copyright © 2020 FLEX Team. All rights reserved.
 //
 
 #import <UIKit/UIKit.h>

Classes/Core/Views/Carousel/FLEXCarouselCell.m

@@ -3,7 +3,7 @@
 //  FLEX
 //
 //  Created by Tanner Bennett on 7/17/19.
-//  Copyright © 2019 Flipboard. All rights reserved.
+//  Copyright © 2020 FLEX Team. All rights reserved.
 //
 
 #import "FLEXCarouselCell.h"
@@ -25,8 +25,10 @@
         _selectionIndicatorStripe = [UIView new];
 
         self.titleLabel.font = [UIFont preferredFontForTextStyle:UIFontTextStyleBody];
-        self.titleLabel.adjustsFontForContentSizeCategory = YES;
         self.selectionIndicatorStripe.backgroundColor = self.tintColor;
+        if (@available(iOS 10, *)) {
+            self.titleLabel.adjustsFontForContentSizeCategory = YES;
+        }
 
         [self.contentView addSubview:self.titleLabel];
         [self.contentView addSubview:self.selectionIndicatorStripe];
@@ -45,7 +47,7 @@
     if (self.selected) {
         self.titleLabel.textColor = self.tintColor;
     } else {
-        self.titleLabel.textColor = [FLEXColor deemphasizedTextColor];
+        self.titleLabel.textColor = FLEXColor.deemphasizedTextColor;
     }
 }
 
@@ -75,7 +77,7 @@
     self.selectionIndicatorStripe.translatesAutoresizingMaskIntoConstraints = NO;
 
     UIView *superview = self.contentView;
-    [self.titleLabel pinEdgesToSuperviewWithInsets:UIEdgeInsetsMake(10, 15, 8 + stripeHeight, 15)];
+    [self.titleLabel flex_pinEdgesToSuperviewWithInsets:UIEdgeInsetsMake(10, 15, 8 + stripeHeight, 15)];
 
     [self.selectionIndicatorStripe.leadingAnchor constraintEqualToAnchor:superview.leadingAnchor].active = YES;
     [self.selectionIndicatorStripe.bottomAnchor constraintEqualToAnchor:superview.bottomAnchor].active = YES;

Classes/Core/Views/Carousel/FLEXScopeCarousel.h

@@ -3,7 +3,7 @@
 //  FLEX
 //
 //  Created by Tanner Bennett on 7/17/19.
-//  Copyright © 2019 Flipboard. All rights reserved.
+//  Copyright © 2020 FLEX Team. All rights reserved.
 //
 
 #import <UIKit/UIKit.h>

Classes/Core/Views/Carousel/FLEXScopeCarousel.m

@@ -3,12 +3,13 @@
 //  FLEX
 //
 //  Created by Tanner Bennett on 7/17/19.
-//  Copyright © 2019 Flipboard. All rights reserved.
+//  Copyright © 2020 FLEX Team. All rights reserved.
 //
 
 #import "FLEXScopeCarousel.h"
 #import "FLEXCarouselCell.h"
 #import "FLEXColor.h"
+#import "FLEXMacros.h"
 #import "UIView+FLEX_Layout.h"
 
 const CGFloat kCarouselItemSpacing = 0;
@@ -29,7 +30,7 @@ NSString * const kCarouselCellReuseIdentifier = @"kCarouselCellReuseIdentifier";
 - (id)initWithFrame:(CGRect)frame {
     self = [super initWithFrame:frame];
     if (self) {
-        self.backgroundColor = [FLEXColor primaryBackgroundColor];
+        self.backgroundColor = FLEXColor.primaryBackgroundColor;
         self.autoresizingMask = UIViewAutoresizingFlexibleWidth;
         self.translatesAutoresizingMaskIntoConstraints = YES;
         _dynamicTypeHandlers = [NSMutableArray new];
@@ -72,15 +73,14 @@ NSString * const kCarouselCellReuseIdentifier = @"kCarouselCellReuseIdentifier";
         self.sizingCell.title = @"NSObject";
 
         // Dynamic type
-        __weak __typeof(self) weakSelf = self;
+        weakify(self);
         _dynamicTypeObserver = [NSNotificationCenter.defaultCenter
             addObserverForName:UIContentSizeCategoryDidChangeNotification
-            object:nil queue:nil usingBlock:^(NSNotification *note) {
+            object:nil queue:nil usingBlock:^(NSNotification *note) { strongify(self)
                 [self.collectionView setNeedsLayout];
                 [self setNeedsUpdateConstraints];
 
                 // Notify observers
-                __typeof(self) self = weakSelf;
                 for (void (^block)(FLEXScopeCarousel *) in self.dynamicTypeHandlers) {
                     block(self);
                 }
@@ -104,7 +104,7 @@ NSString * const kCarouselCellReuseIdentifier = @"kCarouselCellReuseIdentifier";
 
     // Draw hairline
     CGContextRef context = UIGraphicsGetCurrentContext();
-    CGContextSetStrokeColorWithColor(context, [FLEXColor hairlineColor].CGColor);
+    CGContextSetStrokeColorWithColor(context, FLEXColor.hairlineColor.CGColor);
     CGContextSetLineWidth(context, width);
     CGContextMoveToPoint(context, 0, rect.size.height - width);
     CGContextAddLineToPoint(context, rect.size.width, rect.size.height - width);
@@ -118,7 +118,7 @@ NSString * const kCarouselCellReuseIdentifier = @"kCarouselCellReuseIdentifier";
 - (void)updateConstraints {
     if (!self.constraintsInstalled) {
         self.collectionView.translatesAutoresizingMaskIntoConstraints = NO;
-        [self.collectionView pinEdgesToSuperview];
+        [self.collectionView flex_pinEdgesToSuperview];
         
         self.constraintsInstalled = YES;
     }

Classes/Core/Views/Cells/FLEXCodeFontCell.h

@@ -3,7 +3,7 @@
 //  FLEX
 //
 //  Created by Tanner on 12/27/19.
-//  Copyright © 2019 Flipboard. All rights reserved.
+//  Copyright © 2020 FLEX Team. All rights reserved.
 //
 
 #import "FLEXMultilineTableViewCell.h"

Classes/Core/Views/Cells/FLEXCodeFontCell.m

@@ -3,7 +3,7 @@
 //  FLEX
 //
 //  Created by Tanner on 12/27/19.
-//  Copyright © 2019 Flipboard. All rights reserved.
+//  Copyright © 2020 FLEX Team. All rights reserved.
 //
 
 #import "FLEXCodeFontCell.h"

Classes/Core/Views/Cells/FLEXKeyValueTableViewCell.h

@@ -3,7 +3,7 @@
 //  FLEX
 //
 //  Created by Tanner Bennett on 1/23/20.
-//  Copyright © 2020 Flipboard. All rights reserved.
+//  Copyright © 2020 FLEX Team. All rights reserved.
 //
 
 #import "FLEXTableViewCell.h"

Classes/Core/Views/Cells/FLEXKeyValueTableViewCell.m

@@ -3,7 +3,7 @@
 //  FLEX
 //
 //  Created by Tanner Bennett on 1/23/20.
-//  Copyright © 2020 Flipboard. All rights reserved.
+//  Copyright © 2020 FLEX Team. All rights reserved.
 //
 
 #import "FLEXKeyValueTableViewCell.h"

Classes/Core/Views/Cells/FLEXMultilineTableViewCell.h

@@ -3,7 +3,7 @@
 //  FLEX
 //
 //  Created by Ryan Olson on 2/13/15.
-//  Copyright (c) 2015 f. All rights reserved.
+//  Copyright (c) 2020 FLEX Team. All rights reserved.
 //
 
 #import "FLEXTableViewCell.h"

Classes/Core/Views/Cells/FLEXMultilineTableViewCell.m

@@ -3,7 +3,7 @@
 //  FLEX
 //
 //  Created by Ryan Olson on 2/13/15.
-//  Copyright (c) 2015 f. All rights reserved.
+//  Copyright (c) 2020 FLEX Team. All rights reserved.
 //
 
 #import "FLEXMultilineTableViewCell.h"
@@ -26,7 +26,7 @@
 }
 
 + (UIEdgeInsets)labelInsets {
-    return UIEdgeInsetsMake(10.0, 15.0, 10.0, 15.0);
+    return UIEdgeInsetsMake(10.0, 16.0, 10.0, 8.0);
 }
 
 + (CGFloat)preferredHeightWithAttributedText:(NSAttributedString *)attributedText

Classes/Core/Views/Cells/FLEXSubtitleTableViewCell.h

@@ -3,7 +3,7 @@
 //  FLEX
 //
 //  Created by Tanner on 4/17/19.
-//  Copyright © 2019 Flipboard. All rights reserved.
+//  Copyright © 2020 FLEX Team. All rights reserved.
 //
 
 #import "FLEXTableViewCell.h"

Classes/Core/Views/Cells/FLEXSubtitleTableViewCell.m

@@ -3,7 +3,7 @@
 //  FLEX
 //
 //  Created by Tanner on 4/17/19.
-//  Copyright © 2019 Flipboard. All rights reserved.
+//  Copyright © 2020 FLEX Team. All rights reserved.
 //
 
 #import "FLEXSubtitleTableViewCell.h"

Classes/Core/Views/Cells/FLEXTableViewCell.h

@@ -3,7 +3,7 @@
 //  FLEX
 //
 //  Created by Tanner on 4/17/19.
-//  Copyright © 2019 Flipboard. All rights reserved.
+//  Copyright © 2020 FLEX Team. All rights reserved.
 //
 
 #import <UIKit/UIKit.h>

Classes/Core/Views/Cells/FLEXTableViewCell.m

@@ -3,7 +3,7 @@
 //  FLEX
 //
 //  Created by Tanner on 4/17/19.
-//  Copyright © 2019 Flipboard. All rights reserved.
+//  Copyright © 2020 FLEX Team. All rights reserved.
 //
 
 #import "FLEXTableViewCell.h"
@@ -37,7 +37,7 @@
     UIFont *cellFont = UIFont.flex_defaultTableCellFont;
     self.titleLabel.font = cellFont;
     self.subtitleLabel.font = cellFont;
-    self.subtitleLabel.textColor = [FLEXColor deemphasizedTextColor];
+    self.subtitleLabel.textColor = FLEXColor.deemphasizedTextColor;
     
     self.titleLabel.lineBreakMode = NSLineBreakByTruncatingMiddle;
     self.subtitleLabel.lineBreakMode = NSLineBreakByTruncatingMiddle;
@@ -54,39 +54,4 @@
     return self.detailTextLabel;
 }
 
-- (BOOL)canPerformAction:(SEL)action withSender:(id)sender {
-    return [self._tableView _canPerformAction:action forCell:self sender:sender];
-}
-
-/// We use this to allow our table view to allow its delegate
-/// to handle any action it chooses to support, without
-/// explicitly implementing the method ourselves.
-///
-/// Alternative considered: override respondsToSelector
-/// to return NO. I decided against this for simplicity's
-/// sake. I see this as "fixing" a poorly designed API.
-/// That approach would require lots of boilerplate to
-/// make the menu appear above this cell.
-- (void)forwardInvocation:(NSInvocation *)invocation {
-    // Must be unretained to avoid over-releasing
-    __unsafe_unretained id sender;
-    [invocation getArgument:&sender atIndex:2];
-    SEL action = invocation.selector;
-
-    // [self._tableView _performAction:action forCell:[self retain] sender:[sender retain]];
-    invocation.selector = @selector(_performAction:forCell:sender:);
-    [invocation setArgument:&action atIndex:2];
-    [invocation setArgument:(void *)&self atIndex:3];
-    [invocation setArgument:(void *)&sender atIndex:4];
-    [invocation invokeWithTarget:self._tableView];
-}
-
-- (NSMethodSignature *)methodSignatureForSelector:(SEL)selector {
-    if ([self canPerformAction:selector withSender:nil]) {
-        return [self._tableView methodSignatureForSelector:@selector(_performAction:forCell:sender:)];
-    }
-
-    return [super methodSignatureForSelector:selector];
-}
-
 @end

Classes/Core/Views/FLEXTableView.h

@@ -3,11 +3,13 @@
 //  FLEX
 //
 //  Created by Tanner on 4/17/19.
-//  Copyright © 2019 Flipboard. All rights reserved.
+//  Copyright © 2020 FLEX Team. All rights reserved.
 //
 
 #import <UIKit/UIKit.h>
 
+NS_ASSUME_NONNULL_BEGIN
+
 #pragma mark Reuse identifiers
 
 typedef NSString * FLEXTableViewCellReuseIdentifier;
@@ -42,3 +44,5 @@ extern FLEXTableViewCellReuseIdentifier const kFLEXCodeFontCell;
 - (void)registerCells:(NSDictionary<NSString *, Class> *)registrationMapping;
 
 @end
+
+NS_ASSUME_NONNULL_END

Classes/Core/Views/FLEXTableView.m

@@ -3,7 +3,7 @@
 //  FLEX
 //
 //  Created by Tanner on 4/17/19.
-//  Copyright © 2019 Flipboard. All rights reserved.
+//  Copyright © 2020 FLEX Team. All rights reserved.
 //
 
 #import "FLEXTableView.h"
@@ -30,53 +30,21 @@ FLEXTableViewCellReuseIdentifier const kFLEXCodeFontCell = @"kFLEXCodeFontCell";
 @implementation FLEXTableView
 
 + (instancetype)flexDefaultTableView {
-#if FLEX_AT_LEAST_IOS13_SDK
     if (@available(iOS 13.0, *)) {
         return [[self alloc] initWithFrame:CGRectZero style:UITableViewStyleInsetGrouped];
     } else {
         return [[self alloc] initWithFrame:CGRectZero style:UITableViewStyleGrouped];
     }
-#else
-    return [[self alloc] initWithFrame:CGRectZero style:UITableViewStyleGrouped];
-#endif
-}
-
-- (CGFloat)_heightForHeaderInSection:(NSInteger)section {
-    CGFloat height = [super _heightForHeaderInSection:section];
-    if (section == 0) {
-        NSString *title = [self _titleForHeaderInSection:section];
-        if (self.tableHeaderView) {
-            if (!@available(iOS 13, *)) {
-                return height - self.tableHeaderView.frame.size.height + 8;
-            }
-            // On iOS 13, returning an empty title for the table view
-            // messes with the height of the table view later on.
-            // We return a space to work around this.
-            else if ([title isEqualToString:@" "]) {
-                return height - self.tableHeaderView.frame.size.height + 5;
-            }
-        } else {
-            if (@available(iOS 13, *) && [title isEqualToString:@" "]) {
-                return 5;
-            }
-        }
-    }
-
-    return height;
 }
 
 #pragma mark - Initialization
 
 + (id)groupedTableView {
-#if FLEX_AT_LEAST_IOS13_SDK
     if (@available(iOS 13.0, *)) {
         return [[self alloc] initWithFrame:CGRectZero style:UITableViewStyleInsetGrouped];
     } else {
         return [[self alloc] initWithFrame:CGRectZero style:UITableViewStyleGrouped];
     }
-#else
-    return [[self alloc] initWithFrame:CGRectZero style:UITableViewStyleGrouped];
-#endif
 }
 
 + (id)plainTableView {

Classes/Editing/ArgumentInputViews/FLEXArgumentInputColorView.h

@@ -3,7 +3,7 @@
 //  Flipboard
 //
 //  Created by Ryan Olson on 6/30/14.
-//  Copyright (c) 2014 Flipboard. All rights reserved.
+//  Copyright (c) 2020 FLEX Team. All rights reserved.
 //
 
 #import "FLEXArgumentInputView.h"

Classes/Editing/ArgumentInputViews/FLEXArgumentInputColorView.m

@@ -3,7 +3,7 @@
 //  Flipboard
 //
 //  Created by Ryan Olson on 6/30/14.
-//  Copyright (c) 2014 Flipboard. All rights reserved.
+//  Copyright (c) 2020 FLEX Team. All rights reserved.
 //
 
 #import "FLEXArgumentInputColorView.h"
@@ -234,7 +234,7 @@
             [self updateWithColor:color];
         }
     } else {
-        [self updateWithColor:[UIColor clearColor]];
+        [self updateWithColor:UIColor.clearColor];
     }
 }
 

Classes/Editing/ArgumentInputViews/FLEXArgumentInputDateView.h

@@ -3,7 +3,7 @@
 //  Flipboard
 //
 //  Created by Daniel Rodriguez Troitino on 2/14/15.
-//  Copyright (c) 2015 Flipboard. All rights reserved.
+//  Copyright (c) 2020 FLEX Team. All rights reserved.
 //
 
 #import "FLEXArgumentInputView.h"

Classes/Editing/ArgumentInputViews/FLEXArgumentInputDateView.m

@@ -3,7 +3,7 @@
 //  Flipboard
 //
 //  Created by Daniel Rodriguez Troitino on 2/14/15.
-//  Copyright (c) 2015 Flipboard. All rights reserved.
+//  Copyright (c) 2020 FLEX Team. All rights reserved.
 //
 
 #import "FLEXArgumentInputDateView.h"

Classes/Editing/ArgumentInputViews/FLEXArgumentInputFontView.h

@@ -3,7 +3,7 @@
 //  Flipboard
 //
 //  Created by Ryan Olson on 6/28/14.
-//  Copyright (c) 2014 Flipboard. All rights reserved.
+//  Copyright (c) 2020 FLEX Team. All rights reserved.
 //
 
 #import "FLEXArgumentInputView.h"

Classes/Editing/ArgumentInputViews/FLEXArgumentInputFontView.m

@@ -3,7 +3,7 @@
 //  Flipboard
 //
 //  Created by Ryan Olson on 6/28/14.
-//  Copyright (c) 2014 Flipboard. All rights reserved.
+//  Copyright (c) 2020 FLEX Team. All rights reserved.
 //
 
 #import "FLEXArgumentInputFontView.h"

Classes/Editing/ArgumentInputViews/FLEXArgumentInputFontsPickerView.m

@@ -51,8 +51,8 @@
 }
 
 - (void)createAvailableFonts {
-    NSMutableArray<NSString *> *unsortedFontsArray = [NSMutableArray array];
-    for (NSString *eachFontFamily in [UIFont familyNames]) {
+    NSMutableArray<NSString *> *unsortedFontsArray = [NSMutableArray new];
+    for (NSString *eachFontFamily in UIFont.familyNames) {
         for (NSString *eachFontName in [UIFont fontNamesForFamilyName:eachFontFamily]) {
             [unsortedFontsArray addObject:eachFontName];
         }

Classes/Editing/ArgumentInputViews/FLEXArgumentInputNotSupportedView.h

@@ -3,7 +3,7 @@
 //  Flipboard
 //
 //  Created by Ryan Olson on 6/18/14.
-//  Copyright (c) 2014 Flipboard. All rights reserved.
+//  Copyright (c) 2020 FLEX Team. All rights reserved.
 //
 
 #import "FLEXArgumentInputTextView.h"

Classes/Editing/ArgumentInputViews/FLEXArgumentInputNotSupportedView.m

@@ -3,7 +3,7 @@
 //  Flipboard
 //
 //  Created by Ryan Olson on 6/18/14.
-//  Copyright (c) 2014 Flipboard. All rights reserved.
+//  Copyright (c) 2020 FLEX Team. All rights reserved.
 //
 
 #import "FLEXArgumentInputNotSupportedView.h"

Classes/Editing/ArgumentInputViews/FLEXArgumentInputNumberView.h

@@ -3,7 +3,7 @@
 //  Flipboard
 //
 //  Created by Ryan Olson on 6/15/14.
-//  Copyright (c) 2014 Flipboard. All rights reserved.
+//  Copyright (c) 2020 FLEX Team. All rights reserved.
 //
 
 #import "FLEXArgumentInputTextView.h"

Classes/Editing/ArgumentInputViews/FLEXArgumentInputNumberView.m

@@ -3,7 +3,7 @@
 //  Flipboard
 //
 //  Created by Ryan Olson on 6/15/14.
-//  Copyright (c) 2014 Flipboard. All rights reserved.
+//  Copyright (c) 2020 FLEX Team. All rights reserved.
 //
 
 #import "FLEXArgumentInputNumberView.h"
@@ -17,6 +17,7 @@
         self.inputTextView.keyboardType = UIKeyboardTypeNumbersAndPunctuation;
         self.targetSize = FLEXArgumentInputViewSizeSmall;
     }
+    
     return self;
 }
 
@@ -33,24 +34,29 @@
 + (BOOL)supportsObjCType:(const char *)type withCurrentValue:(id)value {
     NSParameterAssert(type);
     
-    static NSArray<NSString *> *primitiveTypes = nil;
+    static NSArray<NSString *> *supportedTypes = nil;
     static dispatch_once_t onceToken;
     dispatch_once(&onceToken, ^{
-        primitiveTypes = @[@(@encode(char)),
-                           @(@encode(int)),
-                           @(@encode(short)),
-                           @(@encode(long)),
-                           @(@encode(long long)),
-                           @(@encode(unsigned char)),
-                           @(@encode(unsigned int)),
-                           @(@encode(unsigned short)),
-                           @(@encode(unsigned long)),
-                           @(@encode(unsigned long long)),
-                           @(@encode(float)),
-                           @(@encode(double)),
-                           @(@encode(long double))];
+        supportedTypes = @[
+            @FLEXEncodeClass(NSNumber),
+            @FLEXEncodeClass(NSDecimalNumber),
+            @(@encode(char)),
+            @(@encode(int)),
+            @(@encode(short)),
+            @(@encode(long)),
+            @(@encode(long long)),
+            @(@encode(unsigned char)),
+            @(@encode(unsigned int)),
+            @(@encode(unsigned short)),
+            @(@encode(unsigned long)),
+            @(@encode(unsigned long long)),
+            @(@encode(float)),
+            @(@encode(double)),
+            @(@encode(long double))
+        ];
     });
-    return type && [primitiveTypes containsObject:@(type)];
+    
+    return type && [supportedTypes containsObject:@(type)];
 }
 
 @end

Classes/Editing/ArgumentInputViews/FLEXArgumentInputObjectView.h

@@ -3,7 +3,7 @@
 //  Flipboard
 //
 //  Created by Ryan Olson on 6/15/14.
-//  Copyright (c) 2014 Flipboard. All rights reserved.
+//  Copyright (c) 2020 FLEX Team. All rights reserved.
 //
 
 #import "FLEXArgumentInputTextView.h"

Classes/Editing/ArgumentInputViews/FLEXArgumentInputObjectView.m

@@ -3,7 +3,7 @@
 //  Flipboard
 //
 //  Created by Ryan Olson on 6/15/14.
-//  Copyright (c) 2014 Flipboard. All rights reserved.
+//  Copyright (c) 2020 FLEX Team. All rights reserved.
 //
 
 #import "FLEXArgumentInputObjectView.h"

Classes/Editing/ArgumentInputViews/FLEXArgumentInputStringView.h

@@ -3,7 +3,7 @@
 //  Flipboard
 //
 //  Created by Ryan Olson on 6/28/14.
-//  Copyright (c) 2014 Flipboard. All rights reserved.
+//  Copyright (c) 2020 FLEX Team. All rights reserved.
 //
 
 #import "FLEXArgumentInputTextView.h"

Classes/Editing/ArgumentInputViews/FLEXArgumentInputStringView.m

@@ -3,7 +3,7 @@
 //  Flipboard
 //
 //  Created by Ryan Olson on 6/28/14.
-//  Copyright (c) 2014 Flipboard. All rights reserved.
+//  Copyright (c) 2020 FLEX Team. All rights reserved.
 //
 
 #import "FLEXArgumentInputStringView.h"

Classes/Editing/ArgumentInputViews/FLEXArgumentInputStructView.h

@@ -3,7 +3,7 @@
 //  Flipboard
 //
 //  Created by Ryan Olson on 6/16/14.
-//  Copyright (c) 2014 Flipboard. All rights reserved.
+//  Copyright (c) 2020 FLEX Team. All rights reserved.
 //
 
 #import "FLEXArgumentInputView.h"

Classes/Editing/ArgumentInputViews/FLEXArgumentInputStructView.m

@@ -3,12 +3,13 @@
 //  Flipboard
 //
 //  Created by Ryan Olson on 6/16/14.
-//  Copyright (c) 2014 Flipboard. All rights reserved.
+//  Copyright (c) 2020 FLEX Team. All rights reserved.
 //
 
 #import "FLEXArgumentInputStructView.h"
 #import "FLEXArgumentInputViewFactory.h"
 #import "FLEXRuntimeUtility.h"
+#import "FLEXTypeEncodingParser.h"
 
 @interface FLEXArgumentInputStructView ()
 
@@ -21,7 +22,7 @@
 - (instancetype)initWithArgumentTypeEncoding:(const char *)typeEncoding {
     self = [super initWithArgumentTypeEncoding:typeEncoding];
     if (self) {
-        NSMutableArray<FLEXArgumentInputView *> *inputViews = [NSMutableArray array];
+        NSMutableArray<FLEXArgumentInputView *> *inputViews = [NSMutableArray new];
         NSArray<NSString *> *customTitles = [[self class] customFieldTitlesForTypeEncoding:typeEncoding];
         [FLEXRuntimeUtility enumerateTypesInStructEncoding:typeEncoding usingBlock:^(NSString *structName,
                                                                                      const char *fieldTypeEncoding,
@@ -63,12 +64,8 @@
         const char *structTypeEncoding = [inputValue objCType];
         if (strcmp(self.typeEncoding.UTF8String, structTypeEncoding) == 0) {
             NSUInteger valueSize = 0;
-            @try {
-                // NSGetSizeAndAlignment barfs on type encoding for bitfields.
-                NSGetSizeAndAlignment(structTypeEncoding, &valueSize, NULL);
-            } @catch (NSException *exception) { }
             
-            if (valueSize > 0) {
+            if (FLEXGetSizeAndAlignment(structTypeEncoding, &valueSize, NULL)) {
                 void *unboxedValue = malloc(valueSize);
                 [inputValue getValue:unboxedValue];
                 [FLEXRuntimeUtility enumerateTypesInStructEncoding:structTypeEncoding usingBlock:^(NSString *structName,
@@ -97,12 +94,8 @@
     NSValue *boxedStruct = nil;
     const char *structTypeEncoding = self.typeEncoding.UTF8String;
     NSUInteger structSize = 0;
-    @try {
-        // NSGetSizeAndAlignment barfs on type encoding for bitfields.
-        NSGetSizeAndAlignment(structTypeEncoding, &structSize, NULL);
-    } @catch (NSException *exception) { }
     
-    if (structSize > 0) {
+    if (FLEXGetSizeAndAlignment(structTypeEncoding, &structSize, NULL)) {
         void *unboxedStruct = malloc(structSize);
         [FLEXRuntimeUtility enumerateTypesInStructEncoding:structTypeEncoding usingBlock:^(NSString *structName,
                                                                                            const char *fieldTypeEncoding,
@@ -182,15 +175,7 @@
 + (BOOL)supportsObjCType:(const char *)type withCurrentValue:(id)value {
     NSParameterAssert(type);
     if (type[0] == FLEXTypeEncodingStructBegin) {
-        // We cannot support anything with bitfields or structs,
-        // and this will throw an exception if it does
-        @try {
-            NSGetSizeAndAlignment(type, nil, nil);
-        } @catch (NSException *exception) {
-            return NO;
-        }
-
-        return YES;
+        return FLEXGetSizeAndAlignment(type, nil, nil);
     }
 
     return NO;

Classes/Editing/ArgumentInputViews/FLEXArgumentInputSwitchView.h

@@ -3,7 +3,7 @@
 //  Flipboard
 //
 //  Created by Ryan Olson on 6/16/14.
-//  Copyright (c) 2014 Flipboard. All rights reserved.
+//  Copyright (c) 2020 FLEX Team. All rights reserved.
 //
 
 #import "FLEXArgumentInputView.h"

Classes/Editing/ArgumentInputViews/FLEXArgumentInputSwitchView.m

@@ -3,7 +3,7 @@
 //  Flipboard
 //
 //  Created by Ryan Olson on 6/16/14.
-//  Copyright (c) 2014 Flipboard. All rights reserved.
+//  Copyright (c) 2020 FLEX Team. All rights reserved.
 //
 
 #import "FLEXArgumentInputSwitchView.h"

Classes/Editing/ArgumentInputViews/FLEXArgumentInputTextView.m

@@ -25,7 +25,7 @@
     if (self) {
         self.inputTextView = [UITextView new];
         self.inputTextView.font = [[self class] inputFont];
-        self.inputTextView.backgroundColor = [FLEXColor secondaryGroupedBackgroundColor];
+        self.inputTextView.backgroundColor = FLEXColor.secondaryGroupedBackgroundColor;
         self.inputTextView.layer.cornerRadius = 10.f;
         self.inputTextView.contentInset = UIEdgeInsetsMake(0, 5, 0, 0);
         self.inputTextView.autocapitalizationType = UITextAutocapitalizationTypeNone;
@@ -33,15 +33,16 @@
         self.inputTextView.delegate = self;
         self.inputTextView.inputAccessoryView = [self createToolBar];
         if (@available(iOS 11, *)) {
+            self.inputTextView.smartQuotesType = UITextSmartQuotesTypeNo;
             [self.inputTextView.layer setValue:@YES forKey:@"continuousCorners"];
         } else {
             self.inputTextView.layer.borderWidth = 1.f;
-            self.inputTextView.layer.borderColor = [FLEXColor borderColor].CGColor;
+            self.inputTextView.layer.borderColor = FLEXColor.borderColor.CGColor;
         }
 
         self.placeholderLabel = [UILabel new];
         self.placeholderLabel.font = self.inputTextView.font;
-        self.placeholderLabel.textColor = [FLEXColor deemphasizedTextColor];
+        self.placeholderLabel.textColor = FLEXColor.deemphasizedTextColor;
         self.placeholderLabel.numberOfLines = 0;
 
         [self addSubview:self.inputTextView];

Classes/Editing/ArgumentInputViews/FLEXArgumentInputView.h

@@ -3,7 +3,7 @@
 //  Flipboard
 //
 //  Created by Ryan Olson on 5/30/14.
-//  Copyright (c) 2014 Flipboard. All rights reserved.
+//  Copyright (c) 2020 FLEX Team. All rights reserved.
 //
 
 #import <UIKit/UIKit.h>

Classes/Editing/ArgumentInputViews/FLEXArgumentInputView.m

@@ -3,7 +3,7 @@
 //  Flipboard
 //
 //  Created by Ryan Olson on 5/30/14.
-//  Copyright (c) 2014 Flipboard. All rights reserved.
+//  Copyright (c) 2020 FLEX Team. All rights reserved.
 //
 
 #import "FLEXArgumentInputView.h"
@@ -54,7 +54,7 @@
     if (!_titleLabel) {
         _titleLabel = [UILabel new];
         _titleLabel.font = [[self class] titleFont];
-        _titleLabel.textColor = [FLEXColor primaryTextColor];
+        _titleLabel.textColor = FLEXColor.primaryTextColor;
         _titleLabel.numberOfLines = 0;
         [self addSubview:_titleLabel];
     }

Classes/Editing/FLEXDefaultEditorViewController.h

@@ -3,15 +3,19 @@
 //  Flipboard
 //
 //  Created by Ryan Olson on 5/23/14.
-//  Copyright (c) 2014 Flipboard. All rights reserved.
+//  Copyright (c) 2020 FLEX Team. All rights reserved.
 //
 
 #import "FLEXFieldEditorViewController.h"
 
-@interface FLEXDefaultEditorViewController : FLEXFieldEditorViewController
+NS_ASSUME_NONNULL_BEGIN
 
-- (id)initWithDefaults:(NSUserDefaults *)defaults key:(NSString *)key;
+@interface FLEXDefaultEditorViewController : FLEXVariableEditorViewController
 
-+ (BOOL)canEditDefaultWithValue:(id)currentValue;
++ (instancetype)target:(NSUserDefaults *)defaults key:(NSString *)key commitHandler:(void(^_Nullable)())onCommit;
+
++ (BOOL)canEditDefaultWithValue:(nullable id)currentValue;
 
 @end
+
+NS_ASSUME_NONNULL_END

Classes/Editing/FLEXDefaultEditorViewController.m

@@ -3,7 +3,7 @@
 //  Flipboard
 //
 //  Created by Ryan Olson on 5/23/14.
-//  Copyright (c) 2014 Flipboard. All rights reserved.
+//  Copyright (c) 2020 FLEX Team. All rights reserved.
 //
 
 #import "FLEXDefaultEditorViewController.h"
@@ -15,23 +15,24 @@
 @interface FLEXDefaultEditorViewController ()
 
 @property (nonatomic, readonly) NSUserDefaults *defaults;
-@property (nonatomic) NSString *key;
+@property (nonatomic, readonly) NSString *key;
 
 @end
 
 @implementation FLEXDefaultEditorViewController
 
-- (id)initWithDefaults:(NSUserDefaults *)defaults key:(NSString *)key {
-    self = [super initWithTarget:defaults];
-    if (self) {
-        self.key = key;
-        self.title = @"Edit Default";
-    }
-    return self;
++ (instancetype)target:(NSUserDefaults *)defaults key:(NSString *)key commitHandler:(void(^_Nullable)())onCommit {
+    FLEXDefaultEditorViewController *editor = [self target:defaults data:key commitHandler:onCommit];
+    editor.title = @"Edit Default";
+    return editor;
 }
 
 - (NSUserDefaults *)defaults {
-    return [self.target isKindOfClass:[NSUserDefaults class]] ? self.target : nil;
+    return [_target isKindOfClass:[NSUserDefaults class]] ? _target : nil;
+}
+
+- (NSString *)key {
+    return _data;
 }
 
 - (void)viewDidLoad {
@@ -50,8 +51,6 @@
 }
 
 - (void)actionButtonPressed:(id)sender {
-    [super actionButtonPressed:sender];
-    
     id value = self.firstInputView.inputValue;
     if (value) {
         [self.defaults setObject:value forKey:self.key];
@@ -59,14 +58,16 @@
         [self.defaults removeObjectForKey:self.key];
     }
     [self.defaults synchronize];
-
-    self.firstInputView.inputValue = [self.defaults objectForKey:self.key];
-}
-
-- (void)getterButtonPressed:(id)sender {
-    [super getterButtonPressed:sender];
-    id returnedObject = [self.defaults objectForKey:self.key];
-    [self exploreObjectOrPopViewController:returnedObject];
+    
+    // Dismiss keyboard and handle committed changes
+    [super actionButtonPressed:sender];
+    
+    // Go back after setting, but not for switches.
+    if (sender) {
+        [self.navigationController popViewControllerAnimated:YES];
+    } else {
+        self.firstInputView.inputValue = [self.defaults objectForKey:self.key];
+    }
 }
 
 + (BOOL)canEditDefaultWithValue:(id)currentValue {

Classes/Editing/FLEXFieldEditorView.h

@@ -3,7 +3,7 @@
 //  Flipboard
 //
 //  Created by Ryan Olson on 5/16/14.
-//  Copyright (c) 2014 Flipboard. All rights reserved.
+//  Copyright (c) 2020 FLEX Team. All rights reserved.
 //
 
 #import <UIKit/UIKit.h>

Classes/Editing/FLEXFieldEditorView.m

@@ -3,7 +3,7 @@
 //  Flipboard
 //
 //  Created by Ryan Olson on 5/16/14.
-//  Copyright (c) 2014 Flipboard. All rights reserved.
+//  Copyright (c) 2020 FLEX Team. All rights reserved.
 //
 
 #import "FLEXFieldEditorView.h"

Classes/Editing/FLEXFieldEditorViewController.h

@@ -3,7 +3,7 @@
 //  FLEX
 //
 //  Created by Tanner on 11/22/18.
-//  Copyright © 2018 Flipboard. All rights reserved.
+//  Copyright © 2020 FLEX Team. All rights reserved.
 //
 
 #import "FLEXVariableEditorViewController.h"
@@ -15,9 +15,9 @@ NS_ASSUME_NONNULL_BEGIN
 @interface FLEXFieldEditorViewController : FLEXVariableEditorViewController
 
 /// @return nil if the property is readonly or if the type is unsupported
-+ (nullable instancetype)target:(id)target property:(FLEXProperty *)property;
++ (nullable instancetype)target:(id)target property:(FLEXProperty *)property commitHandler:(void(^_Nullable)())onCommit;
 /// @return nil if the ivar type is unsupported
-+ (nullable instancetype)target:(id)target ivar:(FLEXIvar *)ivar;
++ (nullable instancetype)target:(id)target ivar:(FLEXIvar *)ivar commitHandler:(void(^_Nullable)())onCommit;
 
 /// Subclasses can change the button title via the \c title property
 @property (nonatomic, readonly) UIBarButtonItem *getterButton;

Classes/Editing/FLEXFieldEditorViewController.m

@@ -3,15 +3,17 @@
 //  FLEX
 //
 //  Created by Tanner on 11/22/18.
-//  Copyright © 2018 Flipboard. All rights reserved.
+//  Copyright © 2020 FLEX Team. All rights reserved.
 //
 
 #import "FLEXFieldEditorViewController.h"
 #import "FLEXFieldEditorView.h"
 #import "FLEXArgumentInputViewFactory.h"
 #import "FLEXPropertyAttributes.h"
+#import "FLEXRuntimeUtility.h"
 #import "FLEXUtility.h"
 #import "FLEXColor.h"
+#import "UIBarButtonItem+FLEX.h"
 
 @interface FLEXFieldEditorViewController () <FLEXArgumentInputViewDelegate>
 
@@ -28,21 +30,21 @@
 
 #pragma mark - Initialization
 
-+ (instancetype)target:(id)target property:(FLEXProperty *)property {
++ (instancetype)target:(id)target property:(nonnull FLEXProperty *)property commitHandler:(void(^_Nullable)())onCommit {
     id value = [property getValue:target];
     if (![self canEditProperty:property onObject:target currentValue:value]) {
         return nil;
     }
 
-    FLEXFieldEditorViewController *editor = [self target:target];
-    editor.title = @"Property";
+    FLEXFieldEditorViewController *editor = [self target:target data:property commitHandler:onCommit];
+    editor.title = [@"Property: " stringByAppendingString:property.name];
     editor.property = property;
     return editor;
 }
 
-+ (instancetype)target:(id)target ivar:(nonnull FLEXIvar *)ivar {
-    FLEXFieldEditorViewController *editor = [self target:target];
-    editor.title = @"Instance Variable";
++ (instancetype)target:(id)target ivar:(nonnull FLEXIvar *)ivar commitHandler:(void(^_Nullable)())onCommit {
+    FLEXFieldEditorViewController *editor = [self target:target data:ivar commitHandler:onCommit];
+    editor.title = [@"Ivar: " stringByAppendingString:ivar.name];
     editor.ivar = ivar;
     return editor;
 }
@@ -52,7 +54,7 @@
 - (void)viewDidLoad {
     [super viewDidLoad];
 
-    self.view.backgroundColor = [FLEXColor groupedBackgroundColor];
+    self.view.backgroundColor = FLEXColor.groupedBackgroundColor;
 
     // Create getter button
     _getterButton = [[UIBarButtonItem alloc]
@@ -61,7 +63,9 @@
         target:self
         action:@selector(getterButtonPressed:)
     ];
-    self.navigationItem.rightBarButtonItems = @[self.setterButton, self.getterButton];
+    self.toolbarItems = @[
+        UIBarButtonItem.flex_flexibleSpace, self.getterButton, self.actionButton
+    ];
 
     // Configure input view
     self.fieldEditorView.fieldDescription = self.fieldDescription;
@@ -72,13 +76,16 @@
 
     // Don't show a "set" button for switches; we mutate when the switch is flipped
     if ([inputView isKindOfClass:[FLEXArgumentInputSwitchView class]]) {
-        self.navigationItem.rightBarButtonItem = nil;
+        self.actionButton.enabled = NO;
+        self.actionButton.title = @"Flip the switch to call the setter";
+        // Put getter button before setter button 
+        self.toolbarItems = @[
+            UIBarButtonItem.flex_flexibleSpace, self.actionButton, self.getterButton
+        ];
     }
 }
 
 - (void)actionButtonPressed:(id)sender {
-    [super actionButtonPressed:sender];
-
     if (self.property) {
         id userInputObject = self.firstInputView.inputValue;
         NSArray *arguments = userInputObject ? @[userInputObject] : nil;
@@ -94,6 +101,9 @@
         // this currently could and would assign NSArray to NSMutableArray
         [self.ivar setValue:self.firstInputView.inputValue onObject:self.target];
     }
+    
+    // Dismiss keyboard and handle committed changes
+    [super actionButtonPressed:sender];
 
     // Go back after setting, but not for switches.
     if (sender) {

Classes/Editing/FLEXMethodCallingViewController.h

@@ -3,7 +3,7 @@
 //  Flipboard
 //
 //  Created by Ryan Olson on 5/23/14.
-//  Copyright (c) 2014 Flipboard. All rights reserved.
+//  Copyright (c) 2020 FLEX Team. All rights reserved.
 //
 
 #import "FLEXVariableEditorViewController.h"

Classes/Editing/FLEXMethodCallingViewController.m

@@ -3,7 +3,7 @@
 //  Flipboard
 //
 //  Created by Ryan Olson on 5/23/14.
-//  Copyright (c) 2014 Flipboard. All rights reserved.
+//  Copyright (c) 2020 FLEX Team. All rights reserved.
 //
 
 #import "FLEXMethodCallingViewController.h"
@@ -16,7 +16,7 @@
 #import "FLEXUtility.h"
 
 @interface FLEXMethodCallingViewController ()
-@property (nonatomic) FLEXMethod *method;
+@property (nonatomic, readonly) FLEXMethod *method;
 @end
 
 @implementation FLEXMethodCallingViewController
@@ -28,10 +28,10 @@
 - (id)initWithTarget:(id)target method:(FLEXMethod *)method {
     NSParameterAssert(method.isInstanceMethod == !object_isClass(target));
 
-    self = [super initWithTarget:target];
+    self = [super initWithTarget:target data:method commitHandler:nil];
     if (self) {
-        self.method = method;
-        self.title = method.isInstanceMethod ? @"Method" : @"Class Method";
+        self.title = method.isInstanceMethod ? @"Method: " : @"Class Method: ";
+        self.title = [self.title stringByAppendingString:method.selectorString];
     }
 
     return self;
@@ -40,7 +40,7 @@
 - (void)viewDidLoad {
     [super viewDidLoad];
 
-    self.setterButton.title = @"Call";
+    self.actionButton.title = @"Call";
 
     // Configure field editor view
     self.fieldEditorView.argumentInputViews = [self argumentInputViews];
@@ -53,7 +53,7 @@
 - (NSArray<FLEXArgumentInputView *> *)argumentInputViews {
     Method method = self.method.objc_method;
     NSArray *methodComponents = [FLEXRuntimeUtility prettyArgumentComponentsForMethod:method];
-    NSMutableArray<FLEXArgumentInputView *> *argumentInputViews = [NSMutableArray array];
+    NSMutableArray<FLEXArgumentInputView *> *argumentInputViews = [NSMutableArray new];
     unsigned int argumentIndex = kFLEXNumberOfImplicitArgs;
 
     for (NSString *methodComponent in methodComponents) {
@@ -71,13 +71,11 @@
 }
 
 - (void)actionButtonPressed:(id)sender {
-    [super actionButtonPressed:sender];
-
     // Gather arguments
-    NSMutableArray *arguments = [NSMutableArray array];
+    NSMutableArray *arguments = [NSMutableArray new];
     for (FLEXArgumentInputView *inputView in self.fieldEditorView.argumentInputViews) {
         // Use NSNull as a nil placeholder; it will be interpreted as nil
-        [arguments addObject:inputView.inputValue ?: [NSNull null]];
+        [arguments addObject:inputView.inputValue ?: NSNull.null];
     }
 
     // Call method
@@ -88,6 +86,9 @@
         withArguments:arguments
         error:&error
     ];
+    
+    // Dismiss keyboard and handle committed changes
+    [super actionButtonPressed:sender];
 
     // Display return value or error
     if (error) {
@@ -102,4 +103,8 @@
     }
 }
 
+- (FLEXMethod *)method {
+    return _data;
+}
+
 @end

Classes/Editing/FLEXVariableEditorViewController.h

@@ -3,7 +3,7 @@
 //  Flipboard
 //
 //  Created by Ryan Olson on 5/16/14.
-//  Copyright (c) 2014 Flipboard. All rights reserved.
+//  Copyright (c) 2020 FLEX Team. All rights reserved.
 //
 
 #import <UIKit/UIKit.h>
@@ -11,25 +11,45 @@
 @class FLEXFieldEditorView;
 @class FLEXArgumentInputView;
 
-/// Provides a screen for editing or configuring one or more variables.
-@interface FLEXVariableEditorViewController : UIViewController
+NS_ASSUME_NONNULL_BEGIN
 
-+ (instancetype)target:(id)target;
-- (id)initWithTarget:(id)target;
+/// An abstract screen for editing or configuring one or more variables.
+/// "Target" is the target of the edit operation, and "data" is the data
+/// you want to mutate or pass to the target when the action is performed.
+/// The action may be something like calling a method, setting an ivar, etc.
+@interface FLEXVariableEditorViewController : UIViewController {
+    @protected
+    id _target;
+    _Nullable id _data;
+    void (^_Nullable _commitHandler)();
+}
 
-// Convenience accessor since many subclasses only use one input view
-@property (nonatomic, readonly) FLEXArgumentInputView *firstInputView;
+/// @param target The target of the operation
+/// @param data The data associated with the operation
+/// @param onCommit An action to perform when the data changes 
++ (instancetype)target:(id)target data:(nullable id)data commitHandler:(void(^_Nullable)())onCommit;
+/// @param target The target of the operation
+/// @param data The data associated with the operation
+/// @param onCommit An action to perform when the data changes 
+- (id)initWithTarget:(id)target data:(nullable id)data commitHandler:(void(^_Nullable)())onCommit;
 
-// For subclass use only.
 @property (nonatomic, readonly) id target;
-@property (nonatomic, readonly) FLEXFieldEditorView *fieldEditorView;
-/// Subclasses can change the button title via the \c title property
-@property (nonatomic, readonly) UIBarButtonItem *setterButton;
 
-- (void)actionButtonPressed:(id)sender;
+/// Convenience accessor since many subclasses only use one input view
+@property (nonatomic, readonly, nullable) FLEXArgumentInputView *firstInputView;
+
+@property (nonatomic, readonly) FLEXFieldEditorView *fieldEditorView;
+/// Subclasses can change the button title via the button's \c title property
+@property (nonatomic, readonly) UIBarButtonItem *actionButton;
+
+/// Subclasses should override to provide "set" functionality.
+/// The commit handler--if present--is called here.
+- (void)actionButtonPressed:(nullable id)sender;
 
 /// Pushes an explorer view controller for the given object
 /// or pops the current view controller.
-- (void)exploreObjectOrPopViewController:(id)objectOrNil;
+- (void)exploreObjectOrPopViewController:(nullable id)objectOrNil;
 
 @end
+
+NS_ASSUME_NONNULL_END

Classes/Editing/FLEXVariableEditorViewController.m

@@ -3,7 +3,7 @@
 //  Flipboard
 //
 //  Created by Ryan Olson on 5/16/14.
-//  Copyright (c) 2014 Flipboard. All rights reserved.
+//  Copyright (c) 2020 FLEX Team. All rights reserved.
 //
 
 #import "FLEXColor.h"
@@ -15,24 +15,26 @@
 #import "FLEXArgumentInputView.h"
 #import "FLEXArgumentInputViewFactory.h"
 #import "FLEXObjectExplorerViewController.h"
+#import "UIBarButtonItem+FLEX.h"
 
 @interface FLEXVariableEditorViewController () <UIScrollViewDelegate>
 @property (nonatomic) UIScrollView *scrollView;
-@property (nonatomic) id target;
 @end
 
 @implementation FLEXVariableEditorViewController
 
 #pragma mark - Initialization
 
-+ (instancetype)target:(id)target {
-    return [[self alloc] initWithTarget:target];
++ (instancetype)target:(id)target data:(nullable id)data commitHandler:(void(^_Nullable)())onCommit {
+    return [[self alloc] initWithTarget:target data:data commitHandler:onCommit];
 }
 
-- (id)initWithTarget:(id)target {
+- (id)initWithTarget:(id)target data:(nullable id)data commitHandler:(void(^_Nullable)())onCommit {
     self = [super init];
     if (self) {
-        self.target = target;
+        _target = target;
+        _data = data;
+        _commitHandler = onCommit;
         [NSNotificationCenter.defaultCenter
             addObserver:self selector:@selector(keyboardDidShow:)
             name:UIKeyboardDidShowNotification object:nil
@@ -92,13 +94,15 @@
     self.fieldEditorView.targetDescription = [NSString stringWithFormat:@"%@ %p", [self.target class], self.target];
     [self.scrollView addSubview:self.fieldEditorView];
     
-    _setterButton = [[UIBarButtonItem alloc]
+    _actionButton = [[UIBarButtonItem alloc]
         initWithTitle:@"Set"
         style:UIBarButtonItemStyleDone
         target:self
         action:@selector(actionButtonPressed:)
     ];
-    self.navigationItem.rightBarButtonItem = self.setterButton;
+    
+    self.navigationController.toolbarHidden = NO;
+    self.toolbarItems = @[UIBarButtonItem.flex_flexibleSpace, self.actionButton];
 }
 
 - (void)viewWillLayoutSubviews {
@@ -117,6 +121,9 @@
 - (void)actionButtonPressed:(id)sender {
     // Subclasses can override
     [self.fieldEditorView endEditing:YES];
+    if (_commitHandler) {
+        _commitHandler();
+    }
 }
 
 - (void)exploreObjectOrPopViewController:(id)objectOrNil {

Classes/ExplorerInterface/Bookmarks/FLEXBookmarkManager.h

@@ -0,0 +1,19 @@
+//
+//  FLEXBookmarkManager.h
+//  FLEX
+//
+//  Created by Tanner on 2/6/20.
+//  Copyright © 2020 FLEX Team. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface FLEXBookmarkManager : NSObject
+
+@property (nonatomic, readonly, class) NSMutableArray *bookmarks;
+
+@end
+
+NS_ASSUME_NONNULL_END

Classes/ExplorerInterface/Bookmarks/FLEXBookmarkManager.m

@@ -0,0 +1,25 @@
+//
+//  FLEXBookmarkManager.m
+//  FLEX
+//
+//  Created by Tanner on 2/6/20.
+//  Copyright © 2020 FLEX Team. All rights reserved.
+//
+
+#import "FLEXBookmarkManager.h"
+
+static NSMutableArray *kFLEXBookmarkManagerBookmarks = nil;
+
+@implementation FLEXBookmarkManager
+
++ (void)initialize {
+    if (self == [FLEXBookmarkManager class]) {
+        kFLEXBookmarkManagerBookmarks = [NSMutableArray new];
+    }
+}
+
++ (NSMutableArray *)bookmarks {
+    return kFLEXBookmarkManagerBookmarks;
+}
+
+@end

Classes/ExplorerInterface/Bookmarks/FLEXBookmarksViewController.h

@@ -0,0 +1,17 @@
+//
+//  FLEXBookmarksViewController.h
+//  FLEX
+//
+//  Created by Tanner on 2/6/20.
+//  Copyright © 2020 FLEX Team. All rights reserved.
+//
+
+#import "FLEXTableViewController.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface FLEXBookmarksViewController : FLEXTableViewController
+
+@end
+
+NS_ASSUME_NONNULL_END

Classes/ExplorerInterface/Bookmarks/FLEXBookmarksViewController.m

@@ -0,0 +1,235 @@
+//
+//  FLEXBookmarksViewController.m
+//  FLEX
+//
+//  Created by Tanner on 2/6/20.
+//  Copyright © 2020 FLEX Team. All rights reserved.
+//
+
+#import "FLEXBookmarksViewController.h"
+#import "FLEXExplorerViewController.h"
+#import "FLEXNavigationController.h"
+#import "FLEXObjectExplorerFactory.h"
+#import "FLEXBookmarkManager.h"
+#import "UIBarButtonItem+FLEX.h"
+#import "FLEXColor.h"
+#import "FLEXUtility.h"
+#import "FLEXRuntimeUtility.h"
+#import "FLEXTableView.h"
+
+@interface FLEXBookmarksViewController ()
+@property (nonatomic, copy) NSArray *bookmarks;
+@property (nonatomic, readonly) FLEXExplorerViewController *corePresenter;
+@end
+
+@implementation FLEXBookmarksViewController
+
+#pragma mark - Initialization
+
+- (id)init {
+    return [self initWithStyle:UITableViewStylePlain];
+}
+
+- (void)viewDidLoad {
+    [super viewDidLoad];
+    
+    self.navigationController.hidesBarsOnSwipe = NO;
+    self.tableView.allowsMultipleSelectionDuringEditing = YES;
+    
+    [self reloadData];
+}
+
+- (void)viewWillAppear:(BOOL)animated {
+    [super viewWillAppear:animated];
+    [self setupDefaultBarItems];
+}
+
+
+#pragma mark - Private
+
+- (void)reloadData {
+    // We assume the bookmarks aren't going to change out from under us, since
+    // presenting any other tool via keyboard shortcuts should dismiss us first
+    self.bookmarks = FLEXBookmarkManager.bookmarks;
+    self.title = [NSString stringWithFormat:@"Bookmarks (%@)", @(self.bookmarks.count)];
+}
+
+- (void)setupDefaultBarItems {
+    self.navigationItem.rightBarButtonItem = FLEXBarButtonItemSystem(Done, self, @selector(dismissAnimated));
+    self.toolbarItems = @[
+        UIBarButtonItem.flex_flexibleSpace,
+        FLEXBarButtonItemSystem(Edit, self, @selector(toggleEditing)),
+    ];
+    
+    // Disable editing if no bookmarks available
+    self.toolbarItems.lastObject.enabled = self.bookmarks.count > 0;
+}
+
+- (void)setupEditingBarItems {
+    self.navigationItem.rightBarButtonItem = nil;
+    self.toolbarItems = @[
+        [UIBarButtonItem flex_itemWithTitle:@"Close All" target:self action:@selector(closeAllButtonPressed:)],
+        UIBarButtonItem.flex_flexibleSpace,
+        // We use a non-system done item because we change its title dynamically
+        [UIBarButtonItem flex_doneStyleitemWithTitle:@"Done" target:self action:@selector(toggleEditing)]
+    ];
+    
+    self.toolbarItems.firstObject.tintColor = FLEXColor.destructiveColor;
+}
+
+- (FLEXExplorerViewController *)corePresenter {
+    // We must be presented by a FLEXExplorerViewController, or presented
+    // by another view controller that was presented by FLEXExplorerViewController
+    FLEXExplorerViewController *presenter = (id)self.presentingViewController;
+    presenter = (id)presenter.presentingViewController ?: presenter;
+    presenter = (id)presenter.presentingViewController ?: presenter;
+    NSAssert(
+        [presenter isKindOfClass:[FLEXExplorerViewController class]],
+        @"The bookmarks view controller expects to be presented by the explorer controller"
+    );
+    return presenter;
+}
+
+#pragma mark Button Actions
+
+- (void)dismissAnimated {
+    [self dismissAnimated:nil];
+}
+
+- (void)dismissAnimated:(id)selectedObject {
+    if (selectedObject) {
+        UIViewController *explorer = [FLEXObjectExplorerFactory
+            explorerViewControllerForObject:selectedObject
+        ];
+        if ([self.presentingViewController isKindOfClass:[FLEXNavigationController class]]) {
+            // I am presented on an existing navigation stack, so
+            // dismiss myself and push the bookmark there
+            UINavigationController *presenter = (id)self.presentingViewController;
+            [presenter dismissViewControllerAnimated:YES completion:^{
+                [presenter pushViewController:explorer animated:YES];
+            }];
+        } else {
+            // Dismiss myself and present explorer
+            UIViewController *presenter = self.corePresenter;
+            [presenter dismissViewControllerAnimated:YES completion:^{
+                [presenter presentViewController:[FLEXNavigationController
+                    withRootViewController:explorer
+                ] animated:YES completion:nil];
+            }];
+        }
+    } else {
+        // Just dismiss myself
+        [self dismissViewControllerAnimated:YES completion:nil];
+    }
+}
+
+- (void)toggleEditing {
+    NSArray<NSIndexPath *> *selected = self.tableView.indexPathsForSelectedRows;
+    self.editing = !self.editing;
+    
+    if (self.isEditing) {
+        [self setupEditingBarItems];
+    } else {
+        [self setupDefaultBarItems];
+        
+        // Get index set of bookmarks to close
+        NSMutableIndexSet *indexes = [NSMutableIndexSet new];
+        for (NSIndexPath *ip in selected) {
+            [indexes addIndex:ip.row];
+        }
+        
+        if (selected.count) {
+            // Close bookmarks and update data source
+            [FLEXBookmarkManager.bookmarks removeObjectsAtIndexes:indexes];
+            [self reloadData];
+            
+            // Remove deleted rows
+            [self.tableView deleteRowsAtIndexPaths:selected withRowAnimation:UITableViewRowAnimationAutomatic];
+        }
+    }
+}
+
+- (void)closeAllButtonPressed:(UIBarButtonItem *)sender {
+    [FLEXAlert makeSheet:^(FLEXAlert *make) {
+        NSInteger count = self.bookmarks.count;
+        NSString *title = FLEXPluralFormatString(count, @"Remove %@ bookmarks", @"Remove %@ bookmark");
+        make.button(title).destructiveStyle().handler(^(NSArray<NSString *> *strings) {
+            [self closeAll];
+            [self toggleEditing];
+        });
+        make.button(@"Cancel").cancelStyle();
+    } showFrom:self source:sender];
+}
+
+- (void)closeAll {
+    NSInteger rowCount = self.bookmarks.count;
+    
+    // Close bookmarks and update data source
+    [FLEXBookmarkManager.bookmarks removeAllObjects];
+    [self reloadData];
+    
+    // Delete rows from table view
+    NSArray<NSIndexPath *> *allRows = [NSArray flex_forEachUpTo:rowCount map:^id(NSUInteger row) {
+        return [NSIndexPath indexPathForRow:row inSection:0];
+    }];
+    [self.tableView deleteRowsAtIndexPaths:allRows withRowAnimation:UITableViewRowAnimationAutomatic];
+}
+
+
+#pragma mark - Table View Data Source
+
+- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
+    return self.bookmarks.count;
+}
+
+- (UITableViewCell *)tableView:(FLEXTableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
+    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:kFLEXDetailCell forIndexPath:indexPath];
+    
+    id object = self.bookmarks[indexPath.row];
+    cell.textLabel.text = [FLEXRuntimeUtility safeDescriptionForObject:object];
+    cell.detailTextLabel.text = [NSString stringWithFormat:@"%@ — %p", [object class], object];
+    
+    return cell;
+}
+
+
+#pragma mark - Table View Delegate
+
+- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
+    if (self.editing) {
+        // Case: editing with multi-select
+        self.toolbarItems.lastObject.title = @"Remove Selected";
+        self.toolbarItems.lastObject.tintColor = FLEXColor.destructiveColor;
+    } else {
+        // Case: selected a bookmark
+        [self dismissAnimated:self.bookmarks[indexPath.row]];
+    }
+}
+
+- (void)tableView:(UITableView *)tableView didDeselectRowAtIndexPath:(NSIndexPath *)indexPath {
+    NSParameterAssert(self.editing);
+    
+    if (tableView.indexPathsForSelectedRows.count == 0) {
+        self.toolbarItems.lastObject.title = @"Done";
+        self.toolbarItems.lastObject.tintColor = self.view.tintColor;
+    }
+}
+
+- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath {
+    return YES;
+}
+
+- (void)tableView:(UITableView *)table
+commitEditingStyle:(UITableViewCellEditingStyle)edit
+forRowAtIndexPath:(NSIndexPath *)indexPath {
+    NSParameterAssert(edit == UITableViewCellEditingStyleDelete);
+    
+    // Remove bookmark and update data source
+    [FLEXBookmarkManager.bookmarks removeObjectAtIndex:indexPath.row];
+    [self reloadData];
+    
+    // Delete row from table view
+    [table deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];
+}
+
+@end

Classes/ExplorerInterface/FLEXExplorerViewController.h

@@ -3,10 +3,10 @@
 //  Flipboard
 //
 //  Created by Ryan Olson on 4/4/14.
-//  Copyright (c) 2014 Flipboard. All rights reserved.
+//  Copyright (c) 2020 FLEX Team. All rights reserved.
 //
 
-#import <UIKit/UIKit.h>
+#import "FLEXExplorerToolbar.h"
 
 @class FLEXWindow;
 @protocol FLEXExplorerViewControllerDelegate;
@@ -17,13 +17,25 @@
 @property (nonatomic, weak) id <FLEXExplorerViewControllerDelegate> delegate;
 @property (nonatomic, readonly) BOOL wantsWindowToBecomeKey;
 
+@property (nonatomic, readonly) FLEXExplorerToolbar *explorerToolbar;
+
 - (BOOL)shouldReceiveTouchAtWindowPoint:(CGPoint)pointInWindowCoordinates;
 
-/// @brief Used to present (or dismiss) a modal view controller ("tool"), typically triggered by pressing a button in the toolbar.
+/// @brief Used to present (or dismiss) a modal view controller ("tool"),
+/// typically triggered by pressing a button in the toolbar.
 ///
 /// If a tool is already presented, this method simply dismisses it and calls the completion block.
 /// If no tool is presented, @code future() @endcode is presented and the completion block is called.
-- (void)toggleToolWithViewControllerProvider:(UINavigationController *(^)(void))future completion:(void(^)(void))completion;
+- (void)toggleToolWithViewControllerProvider:(UINavigationController *(^)(void))future
+                                  completion:(void (^)(void))completion;
+
+/// @brief Used to present (or dismiss) a modal view controller ("tool"),
+/// typically triggered by pressing a button in the toolbar.
+///
+/// If a tool is already presented, this method dismisses it and presents the given tool.
+/// The completion block is called once the tool has been presented.
+- (void)presentTool:(UINavigationController *(^)(void))future
+         completion:(void (^)(void))completion;
 
 // Keyboard shortcut helpers
 

Classes/ExplorerInterface/FLEXExplorerViewController.m

@@ -3,22 +3,24 @@
 //  Flipboard
 //
 //  Created by Ryan Olson on 4/4/14.
-//  Copyright (c) 2014 Flipboard. All rights reserved.
+//  Copyright (c) 2020 FLEX Team. All rights reserved.
 //
 
 #import "FLEXExplorerViewController.h"
-#import "FLEXExplorerToolbar.h"
-#import "FLEXToolbarItem.h"
+#import "FLEXExplorerToolbarItem.h"
 #import "FLEXUtility.h"
 #import "FLEXWindow.h"
+#import "FLEXTabList.h"
 #import "FLEXNavigationController.h"
 #import "FLEXHierarchyViewController.h"
 #import "FLEXGlobalsViewController.h"
 #import "FLEXObjectExplorerViewController.h"
 #import "FLEXObjectExplorerFactory.h"
-#import "FLEXNetworkHistoryTableViewController.h"
-
-static NSString *const kFLEXToolbarTopMarginDefaultsKey = @"com.flex.FLEXToolbar.topMargin";
+#import "FLEXNetworkMITMViewController.h"
+#import "FLEXTabsViewController.h"
+#import "FLEXWindowManagerController.h"
+#import "FLEXViewControllersViewController.h"
+#import "NSUserDefaults+FLEX.h"
 
 typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
     FLEXExplorerModeDefault,
@@ -28,8 +30,6 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
 
 @interface FLEXExplorerViewController () <FLEXHierarchyDelegate, UIAdaptivePresentationControllerDelegate>
 
-@property (nonatomic) FLEXExplorerToolbar *explorerToolbar;
-
 /// Tracks the currently active tool/mode
 @property (nonatomic) FLEXExplorerMode currentMode;
 
@@ -45,6 +45,9 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
 /// Only valid while a toolbar drag pan gesture is in progress.
 @property (nonatomic) CGRect toolbarFrameBeforeDragging;
 
+/// Only valid while a selected view pan gesture is in progress.
+@property (nonatomic) CGFloat selectedViewLastPanX;
+
 /// Borders of all the visible views in the hierarchy at the selection point.
 /// The keys are NSValues with the corresponding view (nonretained).
 @property (nonatomic) NSDictionary<NSValue *, UIView *> *outlineViewsForVisibleViews;
@@ -58,6 +61,9 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
 /// A colored transparent overlay to indicate that the view is selected.
 @property (nonatomic) UIView *selectedViewOverlay;
 
+/// Used to actuate changes in view selection on iOS 10+
+@property (nonatomic, readonly) UISelectionFeedbackGenerator *selectionFBG API_AVAILABLE(ios(10.0));
+
 /// self.view.window as a \c FLEXWindow
 @property (nonatomic, readonly) FLEXWindow *window;
 
@@ -74,7 +80,7 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
 - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
     self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
     if (self) {
-        self.observedViews = [NSMutableSet set];
+        self.observedViews = [NSMutableSet new];
     }
     return self;
 }
@@ -89,11 +95,10 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
     [super viewDidLoad];
 
     // Toolbar
-    self.explorerToolbar = [FLEXExplorerToolbar new];
+    _explorerToolbar = [FLEXExplorerToolbar new];
 
     // Start the toolbar off below any bars that may be at the top of the view.
-    id toolbarOriginYDefault = [[NSUserDefaults standardUserDefaults] objectForKey:kFLEXToolbarTopMarginDefaultsKey];
-    CGFloat toolbarOriginY = toolbarOriginYDefault ? [toolbarOriginYDefault doubleValue] : 100;
+    CGFloat toolbarOriginY = NSUserDefaults.standardUserDefaults.flex_toolbarTopMargin;
 
     CGRect safeArea = [self viewSafeArea];
     CGSize toolbarSize = [self.explorerToolbar sizeThatFits:CGSizeMake(
@@ -119,6 +124,11 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
     self.movePanGR = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(handleMovePan:)];
     self.movePanGR.enabled = self.currentMode == FLEXExplorerModeMove;
     [self.view addGestureRecognizer:self.movePanGR];
+    
+    // Feedback
+    if (@available(iOS 10.0, *)) {
+        _selectionFBG = [UISelectionFeedbackGenerator new];
+    }
 }
 
 - (void)viewWillAppear:(BOOL)animated {
@@ -145,8 +155,13 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
 }
 
 - (UIInterfaceOrientationMask)supportedInterfaceOrientations {
+    // Commenting this out until I can figure out a better way to solve this
+//    if (self.window.isKeyWindow) {
+//        [self.window resignKeyWindow];
+//    }
+    
     UIViewController *viewControllerToAsk = [self viewControllerForRotationAndOrientation];
-    UIInterfaceOrientationMask supportedOrientations = [FLEXUtility infoPlistSupportedInterfaceOrientationsMask];
+    UIInterfaceOrientationMask supportedOrientations = FLEXUtility.infoPlistSupportedInterfaceOrientationsMask;
     if (viewControllerToAsk && ![viewControllerToAsk isKindOfClass:[self class]]) {
         supportedOrientations = [viewControllerToAsk supportedInterfaceOrientations];
     }
@@ -365,24 +380,25 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
 
 - (void)setupToolbarActions {
     FLEXExplorerToolbar *toolbar = self.explorerToolbar;
-    NSDictionary<NSString *, FLEXToolbarItem *> *actionsToItems = @{
+    NSDictionary<NSString *, FLEXExplorerToolbarItem *> *actionsToItems = @{
         NSStringFromSelector(@selector(selectButtonTapped:)):        toolbar.selectItem,
         NSStringFromSelector(@selector(hierarchyButtonTapped:)):     toolbar.hierarchyItem,
+        NSStringFromSelector(@selector(recentButtonTapped:)):        toolbar.recentItem,
         NSStringFromSelector(@selector(moveButtonTapped:)):          toolbar.moveItem,
         NSStringFromSelector(@selector(globalsButtonTapped:)):       toolbar.globalsItem,
         NSStringFromSelector(@selector(closeButtonTapped:)):         toolbar.closeItem,
     };
     
-    [actionsToItems enumerateKeysAndObjectsUsingBlock:^(NSString *sel, FLEXToolbarItem *item, BOOL *stop) {
+    [actionsToItems enumerateKeysAndObjectsUsingBlock:^(NSString *sel, FLEXExplorerToolbarItem *item, BOOL *stop) {
         [item addTarget:self action:NSSelectorFromString(sel) forControlEvents:UIControlEventTouchUpInside];
     }];
 }
 
-- (void)selectButtonTapped:(FLEXToolbarItem *)sender {
+- (void)selectButtonTapped:(FLEXExplorerToolbarItem *)sender {
     [self toggleSelectTool];
 }
 
-- (void)hierarchyButtonTapped:(FLEXToolbarItem *)sender {
+- (void)hierarchyButtonTapped:(FLEXExplorerToolbarItem *)sender {
     [self toggleViewsTool];
 }
 
@@ -391,48 +407,85 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
     return [UIApplication.sharedApplication valueForKey:statusBarString];
 }
 
-- (void)moveButtonTapped:(FLEXToolbarItem *)sender {
+- (void)recentButtonTapped:(FLEXExplorerToolbarItem *)sender {
+    NSAssert(FLEXTabList.sharedList.activeTab, @"Must have active tab");
+    [self presentViewController:FLEXTabList.sharedList.activeTab animated:YES completion:nil];
+}
+
+- (void)moveButtonTapped:(FLEXExplorerToolbarItem *)sender {
     [self toggleMoveTool];
 }
 
-- (void)globalsButtonTapped:(FLEXToolbarItem *)sender {
+- (void)globalsButtonTapped:(FLEXExplorerToolbarItem *)sender {
     [self toggleMenuTool];
 }
 
-- (void)closeButtonTapped:(FLEXToolbarItem *)sender {
+- (void)closeButtonTapped:(FLEXExplorerToolbarItem *)sender {
     self.currentMode = FLEXExplorerModeDefault;
     [self.delegate explorerViewControllerDidFinish:self];
 }
 
 - (void)updateButtonStates {
-    // Move and details only active when an object is selected.
+    FLEXExplorerToolbar *toolbar = self.explorerToolbar;
+    
+    toolbar.selectItem.selected = self.currentMode == FLEXExplorerModeSelect;
+    
+    // Move only enabled when an object is selected.
     BOOL hasSelectedObject = self.selectedView != nil;
-    self.explorerToolbar.moveItem.enabled = hasSelectedObject;
-    self.explorerToolbar.selectItem.selected = self.currentMode == FLEXExplorerModeSelect;
-    self.explorerToolbar.moveItem.selected = self.currentMode == FLEXExplorerModeMove;
+    toolbar.moveItem.enabled = hasSelectedObject;
+    toolbar.moveItem.selected = self.currentMode == FLEXExplorerModeMove;
+    
+    // Recent only enabled when we have a last active tab
+    toolbar.recentItem.enabled = FLEXTabList.sharedList.activeTab != nil;
 }
 
 
 #pragma mark - Toolbar Dragging
 
 - (void)setupToolbarGestures {
+    FLEXExplorerToolbar *toolbar = self.explorerToolbar;
+    
     // Pan gesture for dragging.
-    UIPanGestureRecognizer *panGR = [[UIPanGestureRecognizer alloc]
+    [toolbar.dragHandle addGestureRecognizer:[[UIPanGestureRecognizer alloc]
         initWithTarget:self action:@selector(handleToolbarPanGesture:)
-    ];
-    [self.explorerToolbar.dragHandle addGestureRecognizer:panGR];
+    ]];
     
     // Tap gesture for hinting.
-    UITapGestureRecognizer *hintTapGR = [[UITapGestureRecognizer alloc]
+    [toolbar.dragHandle addGestureRecognizer:[[UITapGestureRecognizer alloc]
         initWithTarget:self action:@selector(handleToolbarHintTapGesture:)
-    ];
-    [self.explorerToolbar.dragHandle addGestureRecognizer:hintTapGR];
+    ]];
     
     // Tap gesture for showing additional details
     self.detailsTapGR = [[UITapGestureRecognizer alloc]
         initWithTarget:self action:@selector(handleToolbarDetailsTapGesture:)
     ];
-    [self.explorerToolbar.selectedViewDescriptionContainer addGestureRecognizer:self.detailsTapGR];
+    [toolbar.selectedViewDescriptionContainer addGestureRecognizer:self.detailsTapGR];
+    // Swipe gestures for selecting deeper / higher views at a point
+    UIPanGestureRecognizer *leftSwipe = [[UIPanGestureRecognizer alloc]
+        initWithTarget:self action:@selector(handleChangeViewAtPointGesture:)
+    ];
+//    UIPanGestureRecognizer *rightSwipe = [[UIPanGestureRecognizer alloc]
+//        initWithTarget:self action:@selector(handleChangeViewAtPointGesture:)
+//    ];
+//    leftSwipe.direction = UISwipeGestureRecognizerDirectionLeft;
+//    rightSwipe.direction = UISwipeGestureRecognizerDirectionRight;
+    [toolbar.selectedViewDescriptionContainer addGestureRecognizer:leftSwipe];
+//    [toolbar.selectedViewDescriptionContainer addGestureRecognizer:rightSwipe];
+    
+    // Long press gesture to present tabs manager
+    [toolbar.globalsItem addGestureRecognizer:[[UILongPressGestureRecognizer alloc]
+        initWithTarget:self action:@selector(handleToolbarShowTabsGesture:)
+    ]];
+    
+    // Long press gesture to present window manager
+    [toolbar.selectItem addGestureRecognizer:[[UILongPressGestureRecognizer alloc]
+        initWithTarget:self action:@selector(handleToolbarWindowManagerGesture:)
+    ]];
+    
+    // Long press gesture to present view controllers at tap
+    [toolbar.hierarchyItem addGestureRecognizer:[[UILongPressGestureRecognizer alloc]
+        initWithTarget:self action:@selector(handleToolbarShowViewControllersGesture:)
+    ]];
 }
 
 - (void)handleToolbarPanGesture:(UIPanGestureRecognizer *)panGR {
@@ -473,10 +526,7 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
     }
 
     self.explorerToolbar.frame = unconstrainedFrame;
-
-    [NSUserDefaults.standardUserDefaults
-        setDouble:unconstrainedFrame.origin.y forKey:kFLEXToolbarTopMarginDefaultsKey
-    ];
+    NSUserDefaults.standardUserDefaults.flex_toolbarTopMargin = unconstrainedFrame.origin.y;
 }
 
 - (void)handleToolbarHintTapGesture:(UITapGestureRecognizer *)tapGR {
@@ -501,12 +551,49 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
 - (void)handleToolbarDetailsTapGesture:(UITapGestureRecognizer *)tapGR {
     if (tapGR.state == UIGestureRecognizerStateRecognized && self.selectedView) {
         UIViewController *topStackVC = [FLEXObjectExplorerFactory explorerViewControllerForObject:self.selectedView];
-        [self makeKeyAndPresentViewController:
+        [self presentViewController:
             [FLEXNavigationController withRootViewController:topStackVC]
         animated:YES completion:nil];
     }
 }
 
+- (void)handleToolbarShowTabsGesture:(UILongPressGestureRecognizer *)sender {
+    if (sender.state == UIGestureRecognizerStateBegan) {
+        // Back up the UIMenuController items since dismissViewController: will attempt to replace them
+        self.appMenuItems = UIMenuController.sharedMenuController.menuItems;
+        
+        // Don't use FLEXNavigationController because the tab viewer itself is not a tab
+        [super presentViewController:[[UINavigationController alloc]
+            initWithRootViewController:[FLEXTabsViewController new]
+        ] animated:YES completion:nil];
+    }
+}
+
+- (void)handleToolbarWindowManagerGesture:(UILongPressGestureRecognizer *)sender {
+    if (sender.state == UIGestureRecognizerStateBegan) {
+        // Back up the UIMenuController items since dismissViewController: will attempt to replace them
+        self.appMenuItems = UIMenuController.sharedMenuController.menuItems;
+        
+        [super presentViewController:[FLEXNavigationController
+            withRootViewController:[FLEXWindowManagerController new]
+        ] animated:YES completion:nil];
+    }
+}
+
+- (void)handleToolbarShowViewControllersGesture:(UILongPressGestureRecognizer *)sender {
+    if (sender.state == UIGestureRecognizerStateBegan && self.viewsAtTapPoint.count) {
+        // Back up the UIMenuController items since dismissViewController: will attempt to replace them
+        self.appMenuItems = UIMenuController.sharedMenuController.menuItems;
+        
+        UIViewController *list = [FLEXViewControllersViewController
+            controllersForViews:self.viewsAtTapPoint
+        ];
+        [self presentViewController:
+            [FLEXNavigationController withRootViewController:list
+        ] animated:YES completion:nil];
+    }
+}
+
 
 #pragma mark - View Selection
 
@@ -522,6 +609,57 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
     }
 }
 
+- (void)handleChangeViewAtPointGesture:(UIPanGestureRecognizer *)sender {
+    NSInteger max = self.viewsAtTapPoint.count - 1;
+    NSInteger currentIdx = [self.viewsAtTapPoint indexOfObject:self.selectedView];
+    CGFloat locationX = [sender locationInView:self.view].x;
+    
+    // Track the pan gesture: every N points we move along the X axis,
+    // actuate some haptic feedback and move up or down the hierarchy.
+    // We only store the "last" location when we've met the threshold.
+    // We only change the view and actuate feedback if the view selection
+    // changes; that is, as long as we don't go outside or under the array.
+    switch (sender.state) {
+        case UIGestureRecognizerStateBegan: {
+            self.selectedViewLastPanX = locationX;
+            break;
+        }
+        case UIGestureRecognizerStateChanged: {
+            static CGFloat kNextLevelThreshold = 20.f;
+            CGFloat lastX = self.selectedViewLastPanX;
+            NSInteger newSelection = currentIdx;
+            
+            // Left, go down the hierarchy
+            if (locationX < lastX && (lastX - locationX) >= kNextLevelThreshold) {
+                // Choose a new view index up to the max index
+                newSelection = MIN(max, currentIdx + 1);
+                self.selectedViewLastPanX = locationX;
+            }
+            // Right, go up the hierarchy
+            else if (lastX < locationX && (locationX - lastX) >= kNextLevelThreshold) {
+                // Choose a new view index down to the min index
+                newSelection = MAX(0, currentIdx - 1);
+                self.selectedViewLastPanX = locationX;
+            }
+            
+            if (currentIdx != newSelection) {
+                self.selectedView = self.viewsAtTapPoint[newSelection];
+                [self actuateSelectionChangedFeedback];
+            }
+            
+            break;
+        }
+            
+        default: break;
+    }
+}
+
+- (void)actuateSelectionChangedFeedback {
+    if (@available(iOS 10.0, *)) {
+        [self.selectionFBG selectionChanged];
+    }
+}
+
 - (void)updateOutlineViewsForSelectionPoint:(CGPoint)selectionPointInWindow {
     [self removeAndClearOutlineViews];
     
@@ -565,8 +703,8 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
 }
 
 - (NSArray<UIView *> *)viewsAtPoint:(CGPoint)tapPointInWindow skipHiddenViews:(BOOL)skipHidden {
-    NSMutableArray<UIView *> *views = [NSMutableArray array];
-    for (UIWindow *window in [FLEXUtility allWindows]) {
+    NSMutableArray<UIView *> *views = [NSMutableArray new];
+    for (UIWindow *window in FLEXUtility.allWindows) {
         // Don't include the explorer's own window or subviews.
         if (window != self.view.window && [window pointInside:tapPointInWindow withEvent:nil]) {
             [views addObject:window];
@@ -582,8 +720,8 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
     // Select in the window that would handle the touch, but don't just use the result of
     // hitTest:withEvent: so we can still select views with interaction disabled.
     // Default to the the application's key window if none of the windows want the touch.
-    UIWindow *windowForSelection = [UIApplication.sharedApplication keyWindow];
-    for (UIWindow *window in [FLEXUtility allWindows].reverseObjectEnumerator) {
+    UIWindow *windowForSelection = UIApplication.sharedApplication.keyWindow;
+    for (UIWindow *window in FLEXUtility.allWindows.reverseObjectEnumerator) {
         // Ignore the explorer's own window.
         if (window != self.view.window) {
             if ([window hitTest:tapPointInWindow withEvent:nil]) {
@@ -600,7 +738,7 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
 - (NSArray<UIView *> *)recursiveSubviewsAtPoint:(CGPoint)pointInView
                                          inView:(UIView *)view
                                 skipHiddenViews:(BOOL)skipHidden {
-    NSMutableArray<UIView *> *subviewsAtPoint = [NSMutableArray array];
+    NSMutableArray<UIView *> *subviewsAtPoint = [NSMutableArray new];
     for (UIView *subview in view.subviews) {
         BOOL isHidden = subview.hidden || subview.alpha < 0.01;
         if (skipHidden && isHidden) {
@@ -737,20 +875,9 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
 }
 
 
-#pragma mark - Modal Dismissal
-
-- (void)presentationControllerDidDismiss:(UIPresentationController *)presentationController {
-    [self presentedViewControllerDidDismiss];
-}
-
-- (void)presentedViewControllerDidDismiss {
-    [self resignKeyAndDismissViewControllerAnimated:YES completion:nil];
-}
-
-
 #pragma mark - Modal Presentation and Window Management
 
-- (void)makeKeyAndPresentViewController:(UINavigationController *)toPresent
+- (void)presentViewController:(UIViewController *)toPresent
                                animated:(BOOL)animated
                              completion:(void (^)(void))completion {
     // Make our window key to correctly handle input.
@@ -762,38 +889,15 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
     }
     
     // Back up and replace the UIMenuController items
+    // Edit: no longer replacing the items, but still backing them
+    // up in case we start replacing them again in the future
     self.appMenuItems = UIMenuController.sharedMenuController.menuItems;
-    // Initialize custom menu items for explorer screen
-    UIMenuItem *copyObjectAddress = [[UIMenuItem alloc]
-        initWithTitle:@"Copy Address"
-        action:NSSelectorFromString(@"copyObjectAddress:")
-    ];
-    UIMenuController.sharedMenuController.menuItems = @[copyObjectAddress];
-    [UIMenuController.sharedMenuController update];
     
-    // Add the "Done" button to the navigation controller's view controller if it doesn't have one
-    // (the hierarchy screen adds it's own done button in order to pass data between us)
-    if (!toPresent.topViewController.navigationItem.rightBarButtonItem) {
-        toPresent.topViewController.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc]
-            initWithBarButtonSystemItem:UIBarButtonSystemItemDone
-            target:self
-            action:@selector(presentedViewControllerDidDismiss)
-        ];
-    }
-    
-    // Make myself the delegate for sheets presented modally so we can do the
-    // proper cleanup when sheets are dragged to dismiss without the done button
-    if (@available(iOS 13, *)) {
-        toPresent.presentationController.delegate = self;
-    }
-    
-    // Show the view controller.
-    [self presentViewController:toPresent animated:animated completion:completion];
+    // Show the view controller
+    [super presentViewController:toPresent animated:animated completion:completion];
 }
 
-- (void)resignKeyAndDismissViewControllerAnimated:(BOOL)animated
-                                       completion:(void (^)(void))completion
-{
+- (void)dismissViewControllerAnimated:(BOOL)animated completion:(void (^)(void))completion {    
     UIWindow *appWindow = self.window.previousKeyWindow;
     [appWindow makeKeyWindow];
     [appWindow.rootViewController setNeedsStatusBarAppearanceUpdate];
@@ -809,20 +913,35 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
     // scroll to top, but below FLEX otherwise for exploration.
     [self statusWindow].windowLevel = UIWindowLevelStatusBar;
     
-    [self dismissViewControllerAnimated:animated completion:completion];
+    [self updateButtonStates];
+    
+    [super dismissViewControllerAnimated:animated completion:completion];
 }
 
-- (BOOL)wantsWindowToBecomeKey
-{
+- (BOOL)wantsWindowToBecomeKey {
     return self.window.previousKeyWindow != nil;
 }
 
 - (void)toggleToolWithViewControllerProvider:(UINavigationController *(^)(void))future
-                                  completion:(void(^)(void))completion {
+                                  completion:(void (^)(void))completion {
     if (self.presentedViewController) {
-        [self resignKeyAndDismissViewControllerAnimated:YES completion:completion];
+        // We do NOT want to present the future; this is
+        // a convenience method for toggling the SAME TOOL
+        [self dismissViewControllerAnimated:YES completion:completion];
     } else if (future) {
-        [self makeKeyAndPresentViewController:future() animated:YES completion:completion];
+        [self presentViewController:future() animated:YES completion:completion];
+    }
+}
+
+- (void)presentTool:(UINavigationController *(^)(void))future
+         completion:(void (^)(void))completion {
+    if (self.presentedViewController) {
+        // If a tool is already presented, dismiss it first
+        [self dismissViewControllerAnimated:YES completion:^{
+            [self presentViewController:future() animated:YES completion:completion];
+        }];
+    } else if (future) {
+        [self presentViewController:future() animated:YES completion:completion];
     }
 }
 
@@ -843,8 +962,8 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
 
 - (void)toggleMoveTool {
     if (self.currentMode == FLEXExplorerModeMove) {
-        self.currentMode = FLEXExplorerModeDefault;
-    } else {
+        self.currentMode = FLEXExplorerModeSelect;
+    } else if (self.currentMode == FLEXExplorerModeSelect && self.selectedView) {
         self.currentMode = FLEXExplorerModeMove;
     }
 }
@@ -864,11 +983,7 @@ typedef NS_ENUM(NSUInteger, FLEXExplorerMode) {
         } else {
             return [FLEXHierarchyViewController delegate:self];
         }
-    } completion:^{
-        if (completion) {
-            completion();
-        }
-    }];
+    } completion:completion];
 }
 
 - (void)toggleMenuTool {

Classes/ExplorerInterface/FLEXViewControllersViewController.h

@@ -0,0 +1,19 @@
+//
+//  FLEXViewControllersViewController.h
+//  FLEX
+//
+//  Created by Tanner Bennett on 2/13/20.
+//  Copyright © 2020 FLEX Team. All rights reserved.
+//
+
+#import "FLEXFilteringTableViewController.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface FLEXViewControllersViewController : FLEXFilteringTableViewController
+
++ (instancetype)controllersForViews:(NSArray<UIView *> *)views;
+
+@end
+
+NS_ASSUME_NONNULL_END

Classes/ExplorerInterface/FLEXViewControllersViewController.m

@@ -0,0 +1,79 @@
+//
+//  FLEXViewControllersViewController.m
+//  FLEX
+//
+//  Created by Tanner Bennett on 2/13/20.
+//  Copyright © 2020 FLEX Team. All rights reserved.
+//
+
+#import "FLEXViewControllersViewController.h"
+#import "FLEXObjectExplorerFactory.h"
+#import "FLEXMutableListSection.h"
+#import "FLEXUtility.h"
+
+@interface FLEXViewControllersViewController ()
+@property (nonatomic, readonly) FLEXMutableListSection *section;
+@property (nonatomic, readonly) NSArray<UIViewController *> *controllers;
+@end
+
+@implementation FLEXViewControllersViewController
+@dynamic sections, allSections;
+
+#pragma mark - Initialization
+
++ (instancetype)controllersForViews:(NSArray<UIView *> *)views {
+    return [[self alloc] initWithViews:views];
+}
+
+- (id)initWithViews:(NSArray<UIView *> *)views {
+    NSParameterAssert(views.count);
+    
+    self = [self initWithStyle:UITableViewStylePlain];
+    if (self) {
+        _controllers = [views flex_mapped:^id(UIView *view, NSUInteger idx) {
+            return [FLEXUtility viewControllerForView:view];
+        }];
+    }
+    
+    return self;
+}
+
+- (void)viewDidLoad {
+    [super viewDidLoad];
+    
+    self.title = @"View Controllers at Tap";
+    self.showsSearchBar = YES;
+    [self disableToolbar];
+}
+
+- (NSArray<FLEXTableViewSection *> *)makeSections {
+    _section = [FLEXMutableListSection list:self.controllers
+        cellConfiguration:^(UITableViewCell *cell, UIViewController *controller, NSInteger row) {
+            cell.textLabel.text = [NSString
+                stringWithFormat:@"%@ — %p", NSStringFromClass(controller.class), controller
+            ];
+            cell.detailTextLabel.text = controller.view.description;
+            cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
+            cell.textLabel.lineBreakMode = NSLineBreakByTruncatingTail;
+    } filterMatcher:^BOOL(NSString *filterText, UIViewController *controller) {
+        return [NSStringFromClass(controller.class) localizedCaseInsensitiveContainsString:filterText];
+    }];
+    
+    self.section.selectionHandler = ^(UIViewController *host, UIViewController *controller) {
+        [host.navigationController pushViewController:
+            [FLEXObjectExplorerFactory explorerViewControllerForObject:controller]
+        animated:YES];
+    };
+    
+    self.section.customTitle = @"View Controllers";
+    return @[self.section];
+}
+
+
+#pragma mark - Private
+
+- (void)dismissAnimated {
+    [self dismissViewControllerAnimated:YES completion:nil];
+}
+
+@end

Classes/ExplorerInterface/FLEXWindow.h

@@ -3,7 +3,7 @@
 //  Flipboard
 //
 //  Created by Ryan Olson on 4/13/14.
-//  Copyright (c) 2014 Flipboard. All rights reserved.
+//  Copyright (c) 2020 FLEX Team. All rights reserved.
 //
 
 #import <UIKit/UIKit.h>

Classes/ExplorerInterface/FLEXWindow.m

@@ -3,7 +3,7 @@
 //  Flipboard
 //
 //  Created by Ryan Olson on 4/13/14.
-//  Copyright (c) 2014 Flipboard. All rights reserved.
+//  Copyright (c) 2020 FLEX Team. All rights reserved.
 //
 
 #import "FLEXWindow.h"

Classes/ExplorerInterface/FLEXWindowManagerController.h

@@ -0,0 +1,17 @@
+//
+//  FLEXWindowManagerController.h
+//  FLEX
+//
+//  Created by Tanner on 2/6/20.
+//  Copyright © 2020 FLEX Team. All rights reserved.
+//
+
+#import "FLEXTableViewController.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface FLEXWindowManagerController : FLEXTableViewController
+
+@end
+
+NS_ASSUME_NONNULL_END

Classes/ExplorerInterface/FLEXWindowManagerController.m

@@ -0,0 +1,302 @@
+//
+//  FLEXWindowManagerController.m
+//  FLEX
+//
+//  Created by Tanner on 2/6/20.
+//  Copyright © 2020 FLEX Team. All rights reserved.
+//
+
+#import "FLEXWindowManagerController.h"
+#import "FLEXManager+Private.h"
+#import "FLEXUtility.h"
+#import "FLEXObjectExplorerFactory.h"
+
+@interface FLEXWindowManagerController ()
+@property (nonatomic) UIWindow *keyWindow;
+@property (nonatomic, copy) NSString *keyWindowSubtitle;
+@property (nonatomic, copy) NSArray<UIWindow *> *windows;
+@property (nonatomic, copy) NSArray<NSString *> *windowSubtitles;
+@property (nonatomic, copy) NSArray<UIScene *> *scenes API_AVAILABLE(ios(13));
+@property (nonatomic, copy) NSArray<NSString *> *sceneSubtitles;
+@property (nonatomic, copy) NSArray<NSArray *> *sections;
+@end
+
+@implementation FLEXWindowManagerController
+
+#pragma mark - Initialization
+
+- (id)init {
+    return [self initWithStyle:UITableViewStylePlain];
+}
+
+- (void)viewDidLoad {
+    [super viewDidLoad];
+    
+    self.title = @"Windows";
+    if (@available(iOS 13, *)) {
+        self.title = @"Windows and Scenes";
+    }
+    
+    [self disableToolbar];
+    [self reloadData];
+}
+
+
+#pragma mark - Private
+
+- (void)reloadData {
+    self.keyWindow = UIApplication.sharedApplication.keyWindow;
+    self.windows = UIApplication.sharedApplication.windows;
+    self.keyWindowSubtitle = self.windowSubtitles[[self.windows indexOfObject:self.keyWindow]];
+    self.windowSubtitles = [self.windows flex_mapped:^id(UIWindow *window, NSUInteger idx) {
+        return [NSString stringWithFormat:@"Level: %@ — Root: %@",
+            @(window.windowLevel), window.rootViewController
+        ];
+    }];
+    
+    if (@available(iOS 13, *)) {
+        self.scenes = UIApplication.sharedApplication.connectedScenes.allObjects;
+        self.sceneSubtitles = [self.scenes flex_mapped:^id(UIScene *scene, NSUInteger idx) {
+            return [self sceneDescription:scene];
+        }];
+        
+        self.sections = @[@[self.keyWindow], self.windows, self.scenes];
+    } else {
+        self.sections = @[@[self.keyWindow], self.windows];
+    }
+    
+    [self.tableView reloadData];
+}
+
+- (void)dismissAnimated {
+    [self dismissViewControllerAnimated:YES completion:nil];
+}
+
+- (void)showRevertOrDismissAlert:(void(^)())revertBlock {
+    [self.tableView deselectRowAtIndexPath:self.tableView.indexPathForSelectedRow animated:YES];
+    [self reloadData];
+    [self.tableView reloadData];
+    
+    UIWindow *highestWindow = UIApplication.sharedApplication.keyWindow;
+    UIWindowLevel maxLevel = 0;
+    for (UIWindow *window in UIApplication.sharedApplication.windows) {
+        if (window.windowLevel > maxLevel) {
+            maxLevel = window.windowLevel;
+            highestWindow = window;
+        }
+    }
+    
+    [FLEXAlert makeAlert:^(FLEXAlert *make) {
+        make.title(@"Keep Changes?");
+        make.message(@"If you do not wish to keep these settings, choose 'Revert Changes' below.");
+        
+        make.button(@"Keep Changes").destructiveStyle();
+        make.button(@"Keep Changes and Dismiss").destructiveStyle().handler(^(NSArray<NSString *> *strings) {
+            [self dismissAnimated];
+        });
+        make.button(@"Revert Changes").cancelStyle().handler(^(NSArray<NSString *> *strings) {
+            revertBlock();
+            [self reloadData];
+            [self.tableView reloadData];
+        });
+    } showFrom:[FLEXUtility topViewControllerInWindow:highestWindow]];
+}
+
+- (NSString *)sceneDescription:(UIScene *)scene API_AVAILABLE(ios(13)) {
+    NSString *state = [self stringFromSceneState:scene.activationState];
+    NSString *title = scene.title.length ? scene.title : nil;
+    NSString *suffix = nil;
+    
+    if ([scene isKindOfClass:[UIWindowScene class]]) {
+        UIWindowScene *windowScene = (id)scene;
+        suffix = FLEXPluralString(windowScene.windows.count, @"windows", @"window");
+    }
+    
+    NSMutableString *description = state.mutableCopy;
+    if (title) {
+        [description appendFormat:@" — %@", title];
+    }
+    if (suffix) {
+        [description appendFormat:@" — %@", suffix];
+    }
+    
+    return description.copy;
+}
+
+- (NSString *)stringFromSceneState:(UISceneActivationState)state API_AVAILABLE(ios(13)) {
+    switch (state) {
+        case UISceneActivationStateUnattached:
+            return @"Unattached";
+        case UISceneActivationStateForegroundActive:
+            return @"Active";
+        case UISceneActivationStateForegroundInactive:
+            return @"Inactive";
+        case UISceneActivationStateBackground:
+            return @"Backgrounded";
+    }
+    
+    return [NSString stringWithFormat:@"Unknown state: %@", @(state)];
+}
+
+
+#pragma mark - Table View Data Source
+
+- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
+    return self.sections.count;
+}
+
+- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
+    return self.sections[section].count;
+}
+
+- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section {
+    switch (section) {
+        case 0: return @"Key Window";
+        case 1: return @"Windows";
+        case 2: return @"Connected Scenes";
+    }
+    
+    return nil;
+}
+
+- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
+    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:kFLEXDetailCell forIndexPath:indexPath];
+    cell.accessoryType = UITableViewCellAccessoryDetailButton;
+    cell.textLabel.lineBreakMode = NSLineBreakByTruncatingTail;
+    
+    UIWindow *window = nil;
+    NSString *subtitle = nil;
+    
+    switch (indexPath.section) {
+        case 0:
+            window = self.keyWindow;
+            subtitle = self.keyWindowSubtitle;
+            break;
+        case 1:
+            window = self.windows[indexPath.row];
+            subtitle = self.windowSubtitles[indexPath.row];
+            break;
+        case 2:
+            if (@available(iOS 13, *)) {
+                UIScene *scene = self.scenes[indexPath.row];
+                cell.textLabel.text = scene.description;
+                cell.detailTextLabel.text = self.sceneSubtitles[indexPath.row];
+                return cell;
+            }
+    }
+    
+    cell.textLabel.text = window.description;
+    cell.detailTextLabel.text = [NSString
+        stringWithFormat:@"Level: %@ — Root: %@",
+        @((NSInteger)window.windowLevel), window.rootViewController.class
+    ];
+    
+    return cell;
+}
+
+
+#pragma mark - Table View Delegate
+
+- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
+    UIWindow *window = nil;
+    NSString *subtitle = nil;
+    FLEXWindow *flex = FLEXManager.sharedManager.explorerWindow;
+    
+    id cancelHandler = ^{
+        [self.tableView deselectRowAtIndexPath:self.tableView.indexPathForSelectedRow animated:YES];
+    };
+    
+    switch (indexPath.section) {
+        case 0:
+            window = self.keyWindow;
+            subtitle = self.keyWindowSubtitle;
+            break;
+        case 1:
+            window = self.windows[indexPath.row];
+            subtitle = self.windowSubtitles[indexPath.row];
+            break;
+        case 2:
+            if (@available(iOS 13, *)) {
+                UIScene *scene = self.scenes[indexPath.row];
+                UIWindowScene *oldScene = flex.windowScene;
+                BOOL isWindowScene = [scene isKindOfClass:[UIWindowScene class]];
+                BOOL isFLEXScene = isWindowScene ? flex.windowScene == scene : NO;
+                
+                [FLEXAlert makeAlert:^(FLEXAlert *make) {
+                    make.title(NSStringFromClass(scene.class));
+                    
+                    if (isWindowScene) {
+                        if (isFLEXScene) {
+                            make.message(@"Already the FLEX window scene");
+                        }
+                        
+                        make.button(@"Set as FLEX Window Scene")
+                        .handler(^(NSArray<NSString *> *strings) {
+                            flex.windowScene = (id)scene;
+                            [self showRevertOrDismissAlert:^{
+                                flex.windowScene = oldScene;
+                            }];
+                        }).enabled(!isFLEXScene);
+                        make.button(@"Cancel").cancelStyle();
+                    } else {
+                        make.message(@"Not a UIWindowScene");
+                        make.button(@"Dismiss").cancelStyle().handler(cancelHandler);
+                    }
+                } showFrom:self];
+            }
+    }
+
+    __block UIWindow *targetWindow = nil, *oldKeyWindow = nil;
+    __block UIWindowLevel oldLevel;
+    __block BOOL wasVisible;
+    
+    subtitle = [subtitle stringByAppendingString:
+        @"\n\n1) Adjust the FLEX window level relative to this window,\n"
+        "2) adjust this window's level relative to the FLEX window,\n"
+        "3) set this window's level to a specific value, or\n"
+        "4) make this window the key window if it isn't already."
+    ];
+    
+    [FLEXAlert makeAlert:^(FLEXAlert *make) {
+        make.title(NSStringFromClass(window.class)).message(subtitle);
+        make.button(@"Adjust FLEX Window Level").handler(^(NSArray<NSString *> *strings) {
+            targetWindow = flex; oldLevel = flex.windowLevel;
+            flex.windowLevel = window.windowLevel + strings.firstObject.integerValue;
+            
+            [self showRevertOrDismissAlert:^{ targetWindow.windowLevel = oldLevel; }];
+        });
+        make.button(@"Adjust This Window's Level").handler(^(NSArray<NSString *> *strings) {
+            targetWindow = window; oldLevel = window.windowLevel;
+            window.windowLevel = flex.windowLevel + strings.firstObject.integerValue;
+            
+            [self showRevertOrDismissAlert:^{ targetWindow.windowLevel = oldLevel; }];
+        });
+        make.button(@"Set This Window's Level").handler(^(NSArray<NSString *> *strings) {
+            targetWindow = window; oldLevel = window.windowLevel;
+            window.windowLevel = strings.firstObject.integerValue;
+            
+            [self showRevertOrDismissAlert:^{ targetWindow.windowLevel = oldLevel; }];
+        });
+        make.button(@"Make Key And Visible").handler(^(NSArray<NSString *> *strings) {
+            oldKeyWindow = UIApplication.sharedApplication.keyWindow;
+            wasVisible = window.hidden;
+            [window makeKeyAndVisible];
+            
+            [self showRevertOrDismissAlert:^{
+                window.hidden = wasVisible;
+                [oldKeyWindow makeKeyWindow];
+            }];
+        }).enabled(!window.isKeyWindow && !window.hidden);
+        make.button(@"Cancel").cancelStyle().handler(cancelHandler);
+        
+        make.textField(@"+/- window level, i.e. 5 or -10");
+    } showFrom:self];
+}
+
+- (void)tableView:(UITableView *)tableView accessoryButtonTappedForRowWithIndexPath:(NSIndexPath *)ip {
+    [self.navigationController pushViewController:
+        [FLEXObjectExplorerFactory explorerViewControllerForObject:self.sections[ip.section][ip.row]]
+    animated:YES];
+}
+
+@end

Classes/ExplorerInterface/Tabs/FLEXTabList.h

@@ -0,0 +1,45 @@
+//
+//  FLEXTabList.h
+//  FLEX
+//
+//  Created by Tanner on 2/1/20.
+//  Copyright © 2020 FLEX Team. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface FLEXTabList : NSObject
+
+@property (nonatomic, readonly, class) FLEXTabList *sharedList;
+
+@property (nonatomic, readonly, nullable) UINavigationController *activeTab;
+@property (nonatomic, readonly) NSArray<UINavigationController *> *openTabs;
+/// Snapshots of each tab when they were last active.
+@property (nonatomic, readonly) NSArray<UIImage *> *openTabSnapshots;
+/// \c NSNotFound if no tabs are present.
+/// Setting this property changes the active tab to one of the already open tabs.
+@property (nonatomic) NSInteger activeTabIndex;
+
+/// Adds a new tab and sets the new tab as the active tab.
+- (void)addTab:(UINavigationController *)newTab;
+/// Closes the given tab. If this tab was the active tab,
+/// the most recent tab before that becomes the active tab.
+- (void)closeTab:(UINavigationController *)tab;
+/// Closes a tab at the given index. If this tab was the active tab,
+/// the most recent tab before that becomes the active tab.
+- (void)closeTabAtIndex:(NSInteger)idx;
+/// Closes all of the tabs at the given indexes. If the active tab
+/// is included, the most recent still-open tab becomes the active tab.
+- (void)closeTabsAtIndexes:(NSIndexSet *)indexes;
+/// A shortcut to close the active tab.
+- (void)closeActiveTab;
+/// A shortcut to close \e every tab.
+- (void)closeAllTabs;
+
+- (void)updateSnapshotForActiveTab;
+
+@end
+
+NS_ASSUME_NONNULL_END

Classes/ExplorerInterface/Tabs/FLEXTabList.m

@@ -0,0 +1,133 @@
+//
+//  FLEXTabList.m
+//  FLEX
+//
+//  Created by Tanner on 2/1/20.
+//  Copyright © 2020 FLEX Team. All rights reserved.
+//
+
+#import "FLEXTabList.h"
+#import "FLEXUtility.h"
+
+@interface FLEXTabList () {
+    NSMutableArray *_openTabs;
+    NSMutableArray *_openTabSnapshots;
+}
+@end
+#pragma mark -
+@implementation FLEXTabList
+
+#pragma mark Initialization
+
++ (FLEXTabList *)sharedList {
+    static FLEXTabList *sharedList = nil;
+    static dispatch_once_t onceToken;
+    dispatch_once(&onceToken, ^{
+        sharedList = [self new];
+    });
+    
+    return sharedList;
+}
+
+- (id)init {
+    self = [super init];
+    if (self) {
+        _openTabs = [NSMutableArray new];
+        _openTabSnapshots = [NSMutableArray new];
+        _activeTabIndex = NSNotFound;
+    }
+    
+    return self;
+}
+
+
+#pragma mark Private
+
+- (void)chooseNewActiveTab {
+    if (self.openTabs.count) {
+        self.activeTabIndex = self.openTabs.count - 1;
+    } else {
+        self.activeTabIndex = NSNotFound;
+    }
+}
+
+
+#pragma mark Public
+
+- (void)setActiveTabIndex:(NSInteger)idx {
+    NSParameterAssert(idx < self.openTabs.count || idx == NSNotFound);
+    if (_activeTabIndex == idx) return;
+    
+    _activeTabIndex = idx;
+    _activeTab = (idx == NSNotFound) ? nil : self.openTabs[idx];
+}
+
+- (void)addTab:(UINavigationController *)newTab {
+    NSParameterAssert(newTab);
+    
+    // Update snapshot of the last active tab
+    if (self.activeTab) {
+        [self updateSnapshotForActiveTab];
+    }
+    
+    // Add new tab and snapshot,
+    // update active tab and index
+    [_openTabs addObject:newTab];
+    [_openTabSnapshots addObject:[FLEXUtility previewImageForView:newTab.view]];
+    _activeTab = newTab;
+    _activeTabIndex = self.openTabs.count - 1;
+}
+
+- (void)closeTab:(UINavigationController *)tab {
+    NSParameterAssert(tab);
+    NSParameterAssert([self.openTabs containsObject:tab]);
+    NSInteger idx = [self.openTabs indexOfObject:tab];
+    
+    [self closeTabAtIndex:idx];
+}
+
+- (void)closeTabAtIndex:(NSInteger)idx {
+    NSParameterAssert(idx < self.openTabs.count);
+    
+    // Remove old tab and snapshot
+    [_openTabs removeObjectAtIndex:idx];
+    [_openTabSnapshots removeObjectAtIndex:idx];
+    
+    // Update active tab and index if needed
+    if (self.activeTabIndex == idx) {
+        [self chooseNewActiveTab];
+    }
+}
+
+- (void)closeTabsAtIndexes:(NSIndexSet *)indexes {
+    // Remove old tabs and snapshot
+    [_openTabs removeObjectsAtIndexes:indexes];
+    [_openTabSnapshots removeObjectsAtIndexes:indexes];
+    
+    // Update active tab and index if needed
+    if ([indexes containsIndex:self.activeTabIndex]) {
+        [self chooseNewActiveTab];
+    }
+}
+
+- (void)closeActiveTab {
+    [self closeTab:self.activeTab];
+}
+
+- (void)closeAllTabs {
+    // Remove tabs and snapshots
+    [_openTabs removeAllObjects];
+    [_openTabSnapshots removeAllObjects];
+    
+    // Update active tab index
+    self.activeTabIndex = NSNotFound;
+}
+
+- (void)updateSnapshotForActiveTab {
+    if (self.activeTabIndex != NSNotFound) {
+        UIImage *newSnapshot = [FLEXUtility previewImageForView:self.activeTab.view];
+        [_openTabSnapshots replaceObjectAtIndex:self.activeTabIndex withObject:newSnapshot];
+    }
+}
+
+@end

Classes/ExplorerInterface/Tabs/FLEXTabsViewController.h

@@ -0,0 +1,13 @@
+//
+//  FLEXTabsViewController.h
+//  FLEX
+//
+//  Created by Tanner on 2/4/20.
+//  Copyright © 2020 FLEX Team. All rights reserved.
+//
+
+#import "FLEXTableViewController.h"
+
+@interface FLEXTabsViewController : FLEXTableViewController
+
+@end

Classes/ExplorerInterface/Tabs/FLEXTabsViewController.m

@@ -0,0 +1,335 @@
+//
+//  FLEXTabsViewController.m
+//  FLEX
+//
+//  Created by Tanner on 2/4/20.
+//  Copyright © 2020 FLEX Team. All rights reserved.
+//
+
+#import "FLEXTabsViewController.h"
+#import "FLEXNavigationController.h"
+#import "FLEXTabList.h"
+#import "FLEXBookmarkManager.h"
+#import "FLEXTableView.h"
+#import "FLEXUtility.h"
+#import "FLEXColor.h"
+#import "UIBarButtonItem+FLEX.h"
+#import "FLEXExplorerViewController.h"
+#import "FLEXGlobalsViewController.h"
+#import "FLEXBookmarksViewController.h"
+
+@interface FLEXTabsViewController ()
+@property (nonatomic, copy) NSArray<UINavigationController *> *openTabs;
+@property (nonatomic, copy) NSArray<UIImage *> *tabSnapshots;
+@property (nonatomic) NSInteger activeIndex;
+@property (nonatomic) BOOL presentNewActiveTabOnDismiss;
+
+@property (nonatomic, readonly) FLEXExplorerViewController *corePresenter;
+@end
+
+@implementation FLEXTabsViewController
+
+#pragma mark - Initialization
+
+- (id)init {
+    return [self initWithStyle:UITableViewStylePlain];
+}
+
+- (void)viewDidLoad {
+    [super viewDidLoad];
+    
+    self.title = @"Open Tabs";
+    self.navigationController.hidesBarsOnSwipe = NO;
+    self.tableView.allowsMultipleSelectionDuringEditing = YES;
+    
+    [self reloadData:NO];
+}
+
+- (void)viewWillAppear:(BOOL)animated {
+    [super viewWillAppear:animated];
+    [self setupDefaultBarItems];
+}
+
+- (void)viewDidAppear:(BOOL)animated {
+    [super viewDidAppear:animated];
+    
+    // Instead of updating the active snapshot before we present,
+    // we update it after we present to avoid pre-presenation latency
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [FLEXTabList.sharedList updateSnapshotForActiveTab];
+        [self reloadData:NO];
+        [self.tableView reloadData];
+    });
+}
+
+
+#pragma mark - Private
+
+/// @param trackActiveTabDelta whether to check if the active
+/// tab changed and needs to be presented upon "Done" dismissal.
+/// @return whether the active tab changed or not (if there are any tabs left)
+- (BOOL)reloadData:(BOOL)trackActiveTabDelta {
+    BOOL activeTabDidChange = NO;
+    FLEXTabList *list = FLEXTabList.sharedList;
+    
+    // Flag to enable check to determine whether
+    if (trackActiveTabDelta) {
+        NSInteger oldActiveIndex = self.activeIndex;
+        if (oldActiveIndex != list.activeTabIndex && list.activeTabIndex != NSNotFound) {
+            self.presentNewActiveTabOnDismiss = YES;
+            activeTabDidChange = YES;
+        } else if (self.presentNewActiveTabOnDismiss) {
+            // If we had something to present before, now we don't
+            // (i.e. activeTabIndex == NSNotFound)
+            self.presentNewActiveTabOnDismiss = NO;
+        }
+    }
+    
+    // We assume the tabs aren't going to change out from under us, since
+    // presenting any other tool via keyboard shortcuts should dismiss us first
+    self.openTabs = list.openTabs;
+    self.tabSnapshots = list.openTabSnapshots;
+    self.activeIndex = list.activeTabIndex;
+    
+    return activeTabDidChange;
+}
+
+- (void)reloadActiveTabRowIfChanged:(BOOL)activeTabChanged {
+    // Refresh the newly active tab row if needed
+    if (activeTabChanged) {
+        NSIndexPath *active = [NSIndexPath
+           indexPathForRow:self.activeIndex inSection:0
+        ];
+        [self.tableView reloadRowsAtIndexPaths:@[active] withRowAnimation:UITableViewRowAnimationNone];
+    }
+}
+
+- (void)setupDefaultBarItems {
+    self.navigationItem.rightBarButtonItem = FLEXBarButtonItemSystem(Done, self, @selector(dismissAnimated));
+    self.toolbarItems = @[
+        UIBarButtonItem.flex_fixedSpace,
+        UIBarButtonItem.flex_flexibleSpace,
+        FLEXBarButtonItemSystem(Add, self, @selector(addTabButtonPressed:)),
+        UIBarButtonItem.flex_flexibleSpace,
+        FLEXBarButtonItemSystem(Edit, self, @selector(toggleEditing)),
+    ];
+    
+    // Disable editing if no tabs available
+    self.toolbarItems.lastObject.enabled = self.openTabs.count > 0;
+}
+
+- (void)setupEditingBarItems {
+    self.navigationItem.rightBarButtonItem = nil;
+    self.toolbarItems = @[
+        [UIBarButtonItem flex_itemWithTitle:@"Close All" target:self action:@selector(closeAllButtonPressed:)],
+        UIBarButtonItem.flex_flexibleSpace,
+        [UIBarButtonItem flex_disabledSystemItem:UIBarButtonSystemItemAdd],
+        UIBarButtonItem.flex_flexibleSpace,
+        // We use a non-system done item because we change its title dynamically
+        [UIBarButtonItem flex_doneStyleitemWithTitle:@"Done" target:self action:@selector(toggleEditing)]
+    ];
+    
+    self.toolbarItems.firstObject.tintColor = FLEXColor.destructiveColor;
+}
+
+- (FLEXExplorerViewController *)corePresenter {
+    // We must be presented by a FLEXExplorerViewController, or presented
+    // by another view controller that was presented by FLEXExplorerViewController
+    FLEXExplorerViewController *presenter = (id)self.presentingViewController;
+    presenter = (id)presenter.presentingViewController ?: presenter;
+    NSAssert(
+        [presenter isKindOfClass:[FLEXExplorerViewController class]],
+        @"The tabs view controller expects to be presented by the explorer controller"
+    );
+    return presenter;
+}
+
+
+#pragma mark Button Actions
+
+- (void)dismissAnimated {
+    if (self.presentNewActiveTabOnDismiss) {
+        // The active tab was closed so we need to present the new one
+        UIViewController *activeTab = FLEXTabList.sharedList.activeTab;
+        FLEXExplorerViewController *presenter = self.corePresenter;
+        [presenter dismissViewControllerAnimated:YES completion:^{
+            [presenter presentViewController:activeTab animated:YES completion:nil];
+        }];
+    } else if (self.activeIndex == NSNotFound) {
+        // The only tab was closed, so dismiss everything
+        [self.corePresenter dismissViewControllerAnimated:YES completion:nil];
+    } else {
+        // Simple dismiss with the same active tab, only dismiss myself
+        [self dismissViewControllerAnimated:YES completion:nil];
+    }
+}
+
+- (void)toggleEditing {
+    NSArray<NSIndexPath *> *selected = self.tableView.indexPathsForSelectedRows;
+    self.editing = !self.editing;
+    
+    if (self.isEditing) {
+        [self setupEditingBarItems];
+    } else {
+        [self setupDefaultBarItems];
+        
+        // Get index set of tabs to close
+        NSMutableIndexSet *indexes = [NSMutableIndexSet new];
+        for (NSIndexPath *ip in selected) {
+            [indexes addIndex:ip.row];
+        }
+        
+        if (selected.count) {
+            // Close tabs and update data source
+            [FLEXTabList.sharedList closeTabsAtIndexes:indexes];
+            BOOL activeTabChanged = [self reloadData:YES];
+            
+            // Remove deleted rows
+            [self.tableView deleteRowsAtIndexPaths:selected withRowAnimation:UITableViewRowAnimationAutomatic];
+            
+            // Refresh the newly active tab row if needed
+            [self reloadActiveTabRowIfChanged:activeTabChanged];
+        }
+    }
+}
+
+- (void)addTabButtonPressed:(UIBarButtonItem *)sender {
+    if (FLEXBookmarkManager.bookmarks.count) {
+        [FLEXAlert makeSheet:^(FLEXAlert *make) {
+            make.title(@"New Tab");
+            make.button(@"Main Menu").handler(^(NSArray<NSString *> *strings) {
+                [self addTabAndDismiss:[FLEXNavigationController
+                    withRootViewController:[FLEXGlobalsViewController new]
+                ]];
+            });
+            make.button(@"Choose from Bookmarks").handler(^(NSArray<NSString *> *strings) {
+                [self presentViewController:[FLEXNavigationController
+                    withRootViewController:[FLEXBookmarksViewController new]
+                ] animated:YES completion:nil];
+            });
+            make.button(@"Cancel").cancelStyle();
+        } showFrom:self source:sender];
+    } else {
+        // No bookmarks, just open the main menu
+        [self addTabAndDismiss:[FLEXNavigationController
+            withRootViewController:[FLEXGlobalsViewController new]
+        ]];
+    }
+}
+
+- (void)addTabAndDismiss:(UINavigationController *)newTab {
+    FLEXExplorerViewController *presenter = self.corePresenter;
+    [presenter dismissViewControllerAnimated:YES completion:^{
+        [presenter presentViewController:newTab animated:YES completion:nil];
+    }];
+}
+
+- (void)closeAllButtonPressed:(UIBarButtonItem *)sender {
+    [FLEXAlert makeSheet:^(FLEXAlert *make) {
+        NSInteger count = self.openTabs.count;
+        NSString *title = FLEXPluralFormatString(count, @"Close %@ tabs", @"Close %@ tab");
+        make.button(title).destructiveStyle().handler(^(NSArray<NSString *> *strings) {
+            [self closeAll];
+            [self toggleEditing];
+        });
+        make.button(@"Cancel").cancelStyle();
+    } showFrom:self source:sender];
+}
+
+- (void)closeAll {
+    NSInteger rowCount = self.openTabs.count;
+    
+    // Close tabs and update data source
+    [FLEXTabList.sharedList closeAllTabs];
+    [self reloadData:YES];
+    
+    // Delete rows from table view
+    NSArray<NSIndexPath *> *allRows = [NSArray flex_forEachUpTo:rowCount map:^id(NSUInteger row) {
+        return [NSIndexPath indexPathForRow:row inSection:0];
+    }];
+    [self.tableView deleteRowsAtIndexPaths:allRows withRowAnimation:UITableViewRowAnimationAutomatic];
+}
+
+
+#pragma mark - Table View Data Source
+
+- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
+    return self.openTabs.count;
+}
+
+- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
+    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:kFLEXDetailCell forIndexPath:indexPath];
+    
+    UINavigationController *tab = self.openTabs[indexPath.row];
+    cell.imageView.image = self.tabSnapshots[indexPath.row];
+    cell.textLabel.text = tab.topViewController.title;
+    cell.detailTextLabel.text = FLEXPluralString(tab.viewControllers.count, @"pages", @"page");
+    
+    if (!cell.tag) {
+        cell.textLabel.lineBreakMode = NSLineBreakByTruncatingTail;
+        cell.textLabel.font = [UIFont preferredFontForTextStyle:UIFontTextStyleHeadline];
+        cell.detailTextLabel.font = [UIFont preferredFontForTextStyle:UIFontTextStyleSubheadline];
+        cell.tag = 1;
+    }
+    
+    if (indexPath.row == self.activeIndex) {
+        cell.backgroundColor = FLEXColor.secondaryBackgroundColor;
+    } else {
+        cell.backgroundColor = FLEXColor.primaryBackgroundColor;
+    }
+    
+    return cell;
+}
+
+
+#pragma mark - Table View Delegate
+
+- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
+    if (self.editing) {
+        // Case: editing with multi-select
+        self.toolbarItems.lastObject.title = @"Close Selected";
+        self.toolbarItems.lastObject.tintColor = FLEXColor.destructiveColor;
+    } else {
+        if (self.activeIndex == indexPath.row && self.corePresenter != self.presentingViewController) {
+            // Case: selected the already active tab
+            [self dismissAnimated];
+        } else {
+            // Case: selected a different tab,
+            // or selected a tab when presented from the FLEX toolbar
+            FLEXTabList.sharedList.activeTabIndex = indexPath.row;
+            self.presentNewActiveTabOnDismiss = YES;
+            [self dismissAnimated];
+        }
+    }
+}
+
+- (void)tableView:(UITableView *)tableView didDeselectRowAtIndexPath:(NSIndexPath *)indexPath {
+    NSParameterAssert(self.editing);
+    
+    if (tableView.indexPathsForSelectedRows.count == 0) {
+        self.toolbarItems.lastObject.title = @"Done";
+        self.toolbarItems.lastObject.tintColor = self.view.tintColor;
+    }
+}
+
+- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath {
+    return YES;
+}
+
+- (void)tableView:(UITableView *)table
+commitEditingStyle:(UITableViewCellEditingStyle)edit
+forRowAtIndexPath:(NSIndexPath *)indexPath {
+    NSParameterAssert(edit == UITableViewCellEditingStyleDelete);
+    
+    // Close tab and update data source
+    [FLEXTabList.sharedList closeTab:self.openTabs[indexPath.row]];
+    BOOL activeTabChanged = [self reloadData:YES];
+    
+    // Delete row from table view
+    [table deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];
+    
+    // Refresh the newly active tab row if needed
+    [self reloadActiveTabRowIfChanged:activeTabChanged];
+}
+
+@end

Classes/FLEX-Categories.h

@@ -0,0 +1,22 @@
+//
+//  FLEX-Categories.h
+//  FLEX
+//
+//  Created by Tanner on 3/12/20.
+//  Copyright © 2020 FLEX Team. All rights reserved.
+//
+
+
+
+#import <FLEX/UIBarButtonItem+FLEX.h>
+#import <FLEX/CALayer+FLEX.h>
+#import <FLEX/UIFont+FLEX.h>
+#import <FLEX/UIGestureRecognizer+Blocks.h>
+#import <FLEX/UIPasteboard+FLEX.h>
+#import <FLEX/UIMenu+FLEX.h>
+#import <FLEX/UITextField+Range.h>
+
+#import <FLEX/NSObject+FLEX_Reflection.h>
+#import <FLEX/NSArray+FLEX.h>
+#import <FLEX/NSUserDefaults+FLEX.h>
+#import <FLEX/NSTimer+FLEX.h>

Classes/FLEX-Core.h

@@ -0,0 +1,23 @@
+//
+//  FLEX-Core.h
+//  FLEX
+//
+//  Created by Tanner on 3/11/20.
+//  Copyright © 2020 FLEX Team. All rights reserved.
+//
+
+#import <FLEX/FLEXFilteringTableViewController.h>
+#import <FLEX/FLEXNavigationController.h>
+#import <FLEX/FLEXTableViewController.h>
+#import <FLEX/FLEXTableView.h>
+
+#import <FLEX/FLEXSingleRowSection.h>
+#import <FLEX/FLEXTableViewSection.h>
+
+#import <FLEX/FLEXCodeFontCell.h>
+#import <FLEX/FLEXSubtitleTableViewCell.h>
+#import <FLEX/FLEXTableViewCell.h>
+#import <FLEX/FLEXMultilineTableViewCell.h>
+#import <FLEX/FLEXKeyValueTableViewCell.h>
+
+#import <FLEX/FLEXScopeCarousel.h>

Classes/FLEX-ObjectExploring.h

@@ -0,0 +1,30 @@
+//
+//  FLEX-ObjectExploring.h
+//  FLEX
+//
+//  Created by Tanner on 3/11/20.
+//  Copyright © 2020 FLEX Team. All rights reserved.
+//
+
+#import <FLEX/FLEXObjectExplorerFactory.h>
+#import <FLEX/FLEXObjectExplorerViewController.h>
+
+#import <FLEX/FLEXObjectExplorer.h>
+
+#import <FLEX/FLEXShortcut.h>
+#import <FLEX/FLEXShortcutsFactory+Defaults.h>
+#import <FLEX/FLEXShortcutsSection.h>
+#import <FLEX/FLEXBlockShortcuts.h>
+#import <FLEX/FLEXBundleShortcuts.h>
+#import <FLEX/FLEXClassShortcuts.h>
+#import <FLEX/FLEXImageShortcuts.h>
+#import <FLEX/FLEXLayerShortcuts.h>
+#import <FLEX/FLEXViewControllerShortcuts.h>
+#import <FLEX/FLEXViewShortcuts.h>
+
+#import <FLEX/FLEXCollectionContentSection.h>
+#import <FLEX/FLEXColorPreviewSection.h>
+#import <FLEX/FLEXDefaultsContentSection.h>
+#import <FLEX/FLEXMetadataSection.h>
+#import <FLEX/FLEXMutableListSection.h>
+#import <FLEX/FLEXObjectInfoSection.h>

Classes/FLEX-Runtime.h

@@ -0,0 +1,25 @@
+//
+//  FLEX-Runtime.h
+//  FLEX
+//
+//  Created by Tanner on 3/11/20.
+//  Copyright © 2020 FLEX Team. All rights reserved.
+//
+
+#import <FLEX/FLEXObjcInternal.h>
+#import <FLEX/FLEXRuntimeSafety.h>
+#import <FLEX/FLEXBlockDescription.h>
+#import <FLEX/FLEXTypeEncodingParser.h>
+
+#import <FLEX/FLEXMirror.h>
+#import <FLEX/FLEXProtocol.h>
+#import <FLEX/FLEXProperty.h>
+#import <FLEX/FLEXIvar.h>
+#import <FLEX/FLEXMethodBase.h>
+#import <FLEX/FLEXMethod.h>
+#import <FLEX/FLEXPropertyAttributes.h>
+#import <FLEX/FLEXRuntime+Compare.h>
+#import <FLEX/FLEXRuntime+UIKitHelpers.h>
+
+#import <FLEX/FLEXProtocolBuilder.h>
+#import <FLEX/FLEXClassBuilder.h>

Classes/FLEX.h

@@ -3,9 +3,22 @@
 //  FLEX
 //
 //  Created by Eric Horacek on 7/18/15.
-//  Copyright (c) 2015 Flipboard. All rights reserved.
+//  Modified by Tanner Bennett on 3/12/20.
+//  Copyright (c) 2020 FLEX Team. All rights reserved.
 //
 
 #import <FLEX/FLEXManager.h>
 #import <FLEX/FLEXManager+Extensibility.h>
 #import <FLEX/FLEXManager+Networking.h>
+
+#import <FLEX/FLEXExplorerToolbar.h>
+#import <FLEX/FLEXExplorerToolbarItem.h>
+#import <FLEX/FLEXGlobalsEntry.h>
+
+#import <FLEX/FLEX-Core.h>
+#import <FLEX/FLEX-Runtime.h>
+#import <FLEX/FLEX-Categories.h>
+#import <FLEX/FLEX-ObjectExploring.h>
+
+#import <FLEX/FLEXAlert.h>
+#import <FLEX/FLEXResources.h>

Classes/FLEXManager.h

@@ -1,38 +0,0 @@
-//
-//  FLEXManager.h
-//  Flipboard
-//
-//  Created by Ryan Olson on 4/4/14.
-//  Copyright (c) 2014 Flipboard. All rights reserved.
-//
-
-#import <UIKit/UIKit.h>
-
-#if !FLEX_AT_LEAST_IOS13_SDK
-@class UIWindowScene;
-#endif
-
-@interface FLEXManager : NSObject
-
-@property (nonatomic, readonly, class) FLEXManager *sharedManager;
-
-@property (nonatomic, readonly) BOOL isHidden;
-
-- (void)showExplorer;
-- (void)hideExplorer;
-- (void)toggleExplorer;
-
-/// Use this to present the explorer in a specific scene when the one
-/// it chooses by default is not the one you wish to display it in.
-- (void)showExplorerFromScene:(UIWindowScene *)scene API_AVAILABLE(ios(13.0));
-
-#pragma mark - Misc
-
-/// Default database password is @c nil by default.
-/// Set this to the password you want the databases to open with.
-@property (copy, nonatomic) NSString *defaultSqliteDatabasePassword;
-
-@end
-
-
-typedef UIViewController *(^FLEXCustomContentViewerFuture)(NSData *data);

Classes/GlobalStateExplorers/DatabaseBrowser/FLEXDBQueryRowCell.h

@@ -0,0 +1,28 @@
+//
+//  FLEXDBQueryRowCell.h
+//  FLEX
+//
+//  Created by Peng Tao on 15/11/24.
+//  Copyright © 2015年 f. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@class FLEXDBQueryRowCell;
+
+extern NSString * const kFLEXDBQueryRowCellReuse;
+
+@protocol FLEXDBQueryRowCellLayoutSource <NSObject>
+
+- (CGFloat)dbQueryRowCell:(FLEXDBQueryRowCell *)dbQueryRowCell minXForColumn:(NSUInteger)column;
+- (CGFloat)dbQueryRowCell:(FLEXDBQueryRowCell *)dbQueryRowCell widthForColumn:(NSUInteger)column;
+
+@end
+
+@interface FLEXDBQueryRowCell : UITableViewCell
+
+/// An array of NSString, NSNumber, or NSData objects
+@property (nonatomic) NSArray *data;
+@property (nonatomic, weak) id<FLEXDBQueryRowCellLayoutSource> layoutSource;
+
+@end

Classes/GlobalStateExplorers/DatabaseBrowser/FLEXDBQueryRowCell.m

@@ -0,0 +1,75 @@
+//
+//  FLEXDBQueryRowCell.m
+//  FLEX
+//
+//  Created by Peng Tao on 15/11/24.
+//  Copyright © 2015年 f. All rights reserved.
+//
+
+#import "FLEXDBQueryRowCell.h"
+#import "FLEXMultiColumnTableView.h"
+#import "NSArray+FLEX.h"
+#import "UIFont+FLEX.h"
+#import "FLEXColor.h"
+
+NSString * const kFLEXDBQueryRowCellReuse = @"kFLEXDBQueryRowCellReuse";
+
+@interface FLEXDBQueryRowCell ()
+@property (nonatomic) NSInteger columnCount;
+@property (nonatomic) NSArray<UILabel *> *labels;
+@end
+
+@implementation FLEXDBQueryRowCell
+
+- (void)setData:(NSArray *)data {
+    _data = data;
+    self.columnCount = data.count;
+    
+    [self.labels flex_forEach:^(UILabel *label, NSUInteger idx) {
+        id content = self.data[idx];
+        
+        if ([content isKindOfClass:[NSString class]]) {
+            label.text = content;
+        } else if (content == NSNull.null) {
+            label.text = @"<null>";
+            label.textColor = FLEXColor.deemphasizedTextColor;
+        } else {
+            label.text = [content description];
+        }
+    }];
+}
+
+- (void)setColumnCount:(NSInteger)columnCount {
+    if (columnCount != _columnCount) {
+        _columnCount = columnCount;
+        
+        // Remove existing labels
+        for (UILabel *l in self.labels) {
+            [l removeFromSuperview];
+        }
+        
+        // Create new labels
+        self.labels = [NSArray flex_forEachUpTo:columnCount map:^id(NSUInteger i) {
+            UILabel *label = [UILabel new];
+            label.font = UIFont.flex_defaultTableCellFont;
+            label.textAlignment = NSTextAlignmentLeft;
+            [self.contentView addSubview:label];
+            
+            return label;
+        }];
+    }
+}
+
+- (void)layoutSubviews {
+    [super layoutSubviews];
+    
+    CGFloat height = self.contentView.frame.size.height;
+    
+    [self.labels flex_forEach:^(UILabel *label, NSUInteger i) {
+        CGFloat width = [self.layoutSource dbQueryRowCell:self widthForColumn:i];
+        CGFloat minX = [self.layoutSource dbQueryRowCell:self minXForColumn:i];
+        label.frame = CGRectMake(minX + 5, 0, (width - 10), height);
+    }];
+}
+
+@end

Classes/GlobalStateExplorers/DatabaseBrowser/FLEXDatabaseManager.h

@@ -12,15 +12,24 @@
 //  which Flying Meat Inc. licenses this file to you.
 
 #import <Foundation/Foundation.h>
+#import "FLEXSQLResult.h"
 
+/// Conformers should automatically open and close the database
 @protocol FLEXDatabaseManager <NSObject>
 
 @required
-- (instancetype)initWithPath:(NSString*)path;
 
-- (BOOL)open;
-- (NSArray<NSDictionary<NSString *, id> *> *)queryAllTables;
-- (NSArray<NSString *> *)queryAllColumnsWithTableName:(NSString *)tableName;
-- (NSArray<NSDictionary<NSString *, id> *> *)queryAllDataWithTableName:(NSString *)tableName;
+/// @return \c nil if the database couldn't be opened
++ (instancetype)managerForDatabase:(NSString *)path;
+
+/// @return a list of all table names
+- (NSArray<NSString *> *)queryAllTables;
+- (NSArray<NSString *> *)queryAllColumnsOfTable:(NSString *)tableName;
+- (NSArray<NSArray *> *)queryAllDataInTable:(NSString *)tableName;
+
+@optional
+
+- (NSArray<NSString *> *)queryRowIDsInTable:(NSString *)tableName;
+- (FLEXSQLResult *)executeStatement:(NSString *)SQLStatement;
 
 @end

Classes/GlobalStateExplorers/DatabaseBrowser/FLEXMultiColumnTableView.h

@@ -14,8 +14,8 @@
 @protocol FLEXMultiColumnTableViewDelegate <NSObject>
 
 @required
-- (void)multiColumnTableView:(FLEXMultiColumnTableView *)tableView didTapLabelWithText:(NSString *)text;
-- (void)multiColumnTableView:(FLEXMultiColumnTableView *)tableView didTapHeaderWithText:(NSString *)text sortType:(FLEXTableColumnHeaderSortType)sortType;
+- (void)multiColumnTableView:(FLEXMultiColumnTableView *)tableView didSelectRow:(NSInteger)row;
+- (void)multiColumnTableView:(FLEXMultiColumnTableView *)tableView didSelectHeaderForColumn:(NSInteger)column sortType:(FLEXTableColumnHeaderSortType)sortType;
 
 @end
 
@@ -25,12 +25,11 @@
 
 - (NSInteger)numberOfColumnsInTableView:(FLEXMultiColumnTableView *)tableView;
 - (NSInteger)numberOfRowsInTableView:(FLEXMultiColumnTableView *)tableView;
-- (NSString *)columnNameInColumn:(NSInteger)column;
-- (NSString *)rowNameInRow:(NSInteger)row;
-- (NSString *)contentAtColumn:(NSInteger)column row:(NSInteger)row;
-- (NSArray *)contentAtRow:(NSInteger)row;
+- (NSString *)columnTitle:(NSInteger)column;
+- (NSString *)rowTitle:(NSInteger)row;
+- (NSArray<NSString *> *)contentForRow:(NSInteger)row;
 
-- (CGFloat)multiColumnTableView:(FLEXMultiColumnTableView *)tableView widthForContentCellInColumn:(NSInteger)column;
+- (CGFloat)multiColumnTableView:(FLEXMultiColumnTableView *)tableView minWidthForContentCellInColumn:(NSInteger)column;
 - (CGFloat)multiColumnTableView:(FLEXMultiColumnTableView *)tableView heightForContentCellInRow:(NSInteger)row;
 - (CGFloat)heightForTopHeaderInTableView:(FLEXMultiColumnTableView *)tableView;
 - (CGFloat)widthForLeftHeaderInTableView:(FLEXMultiColumnTableView *)tableView;
@@ -40,8 +39,8 @@
 
 @interface FLEXMultiColumnTableView : UIView
 
-@property (nonatomic, weak) id<FLEXMultiColumnTableViewDataSource>dataSource;
-@property (nonatomic, weak) id<FLEXMultiColumnTableViewDelegate>delegate;
+@property (nonatomic, weak) id<FLEXMultiColumnTableViewDataSource> dataSource;
+@property (nonatomic, weak) id<FLEXMultiColumnTableViewDelegate> delegate;
 
 - (void)reloadData;
 

Classes/GlobalStateExplorers/DatabaseBrowser/FLEXMultiColumnTableView.m

@@ -7,11 +7,15 @@
 //
 
 #import "FLEXMultiColumnTableView.h"
-#import "FLEXTableContentCell.h"
+#import "FLEXDBQueryRowCell.h"
 #import "FLEXTableLeftCell.h"
+#import "NSArray+FLEX.h"
+#import "FLEXColor.h"
 
-@interface FLEXMultiColumnTableView ()
-<UITableViewDataSource, UITableViewDelegate,UIScrollViewDelegate, FLEXTableContentCellDelegate>
+@interface FLEXMultiColumnTableView () <
+    UITableViewDataSource, UITableViewDelegate,
+    UIScrollViewDelegate, FLEXDBQueryRowCellLayoutSource
+>
 
 @property (nonatomic) UIScrollView *contentScrollView;
 @property (nonatomic) UIScrollView *headerScrollView;
@@ -19,35 +23,49 @@
 @property (nonatomic) UITableView  *contentTableView;
 @property (nonatomic) UIView       *leftHeader;
 
-@property (nonatomic) NSDictionary<NSString *, NSNumber *> *sortStatusDict;
-@property (nonatomic) NSArray *rowData;
+@property (nonatomic) NSArray<UIView *> *headerViews;
+
+/// \c NSNotFound if no column selected
+@property (nonatomic) NSInteger sortColumn;
+@property (nonatomic) FLEXTableColumnHeaderSortType sortType;
+
+@property (nonatomic, readonly) NSInteger numberOfColumns;
+@property (nonatomic, readonly) NSInteger numberOfRows;
+@property (nonatomic, readonly) CGFloat topHeaderHeight;
+@property (nonatomic, readonly) CGFloat leftHeaderWidth;
+@property (nonatomic, readonly) CGFloat columnMargin;
+
 @end
 
 static const CGFloat kColumnMargin = 1;
 
 @implementation FLEXMultiColumnTableView
 
+#pragma mark - Initialization
 
 - (instancetype)initWithFrame:(CGRect)frame {
     self = [super initWithFrame:frame];
     if (self) {
-        [self loadUI];
+        self.autoresizingMask |= UIViewAutoresizingFlexibleWidth;
+        self.autoresizingMask |= UIViewAutoresizingFlexibleHeight;
+        self.autoresizingMask |= UIViewAutoresizingFlexibleTopMargin;
+        self.backgroundColor  = FLEXColor.groupedBackgroundColor;
+        
+        [self loadHeaderScrollView];
+        [self loadContentScrollView];
+        [self loadLeftView];
     }
+    
     return self;
 }
 
-- (void)didMoveToSuperview {
-    [super didMoveToSuperview];
-    [self reloadData];
-}
-
 - (void)layoutSubviews {
     [super layoutSubviews];
     
     CGFloat width  = self.frame.size.width;
     CGFloat height = self.frame.size.height;
-    CGFloat topheaderHeight = [self topHeaderHeight];
-    CGFloat leftHeaderWidth = [self leftHeaderWidth];
+    CGFloat topheaderHeight = self.topHeaderHeight;
+    CGFloat leftHeaderWidth = self.leftHeaderWidth;
     CGFloat topInsets = 0.f;
 
     if (@available (iOS 11.0, *)) {
@@ -55,46 +73,45 @@ static const CGFloat kColumnMargin = 1;
     }
     
     CGFloat contentWidth = 0.0;
-    NSInteger rowsCount = [self numberOfColumns];
-    for (int i = 0; i < rowsCount; i++) {
-        contentWidth += [self contentWidthForColumn:i];
+    NSInteger columnsCount = self.numberOfColumns;
+    for (int i = 0; i < columnsCount; i++) {
+        contentWidth += CGRectGetWidth(self.headerViews[i].bounds);
     }
     
-    self.leftTableView.frame           = CGRectMake(0, topheaderHeight + topInsets, leftHeaderWidth, height - topheaderHeight - topInsets);
-    self.headerScrollView.frame        = CGRectMake(leftHeaderWidth, topInsets, width - leftHeaderWidth, topheaderHeight);
-    self.headerScrollView.contentSize  = CGSizeMake( self.contentTableView.frame.size.width, self.headerScrollView.frame.size.height);
-    self.contentTableView.frame        = CGRectMake(0, 0, contentWidth + [self numberOfColumns] * [self columnMargin] , height - topheaderHeight - topInsets);
-    self.contentScrollView.frame       = CGRectMake(leftHeaderWidth, topheaderHeight + topInsets, width - leftHeaderWidth, height - topheaderHeight - topInsets);
+    CGFloat contentHeight = height - topheaderHeight - topInsets;
+    
+    self.leftHeader.frame = CGRectMake(0, topInsets, self.leftHeaderWidth, self.topHeaderHeight);
+    self.leftTableView.frame = CGRectMake(
+        0, topheaderHeight + topInsets, leftHeaderWidth, contentHeight
+    );
+    self.headerScrollView.frame = CGRectMake(
+        leftHeaderWidth, topInsets, width - leftHeaderWidth, topheaderHeight
+    );
+    self.headerScrollView.contentSize = CGSizeMake(
+        self.contentTableView.frame.size.width, self.headerScrollView.frame.size.height
+    );
+    self.contentTableView.frame = CGRectMake(
+        0, 0, contentWidth + self.numberOfColumns * self.columnMargin , contentHeight
+    );
+    self.contentScrollView.frame = CGRectMake(
+        leftHeaderWidth, topheaderHeight + topInsets, width - leftHeaderWidth, contentHeight
+    );
     self.contentScrollView.contentSize = self.contentTableView.frame.size;
-    self.leftHeader.frame              = CGRectMake(0, topInsets, [self leftHeaderWidth], [self topHeaderHeight]);
 }
 
 
-- (void)loadUI {
-    [self loadHeaderScrollView];
-    [self loadContentScrollView];
-    [self loadLeftView];
-}
-
-- (void)reloadData {
-    [self loadLeftViewData];
-    [self loadContentData];
-    [self loadHeaderData];
-}
-
 #pragma mark - UI
 
 - (void)loadHeaderScrollView {
-    UIScrollView *headerScrollView = [UIScrollView new];
-    headerScrollView.delegate      = self;
-    self.headerScrollView          = headerScrollView;
-    self.headerScrollView.backgroundColor =  [UIColor colorWithWhite:0.803 alpha:0.850];
+    UIScrollView *headerScrollView   = [UIScrollView new];
+    headerScrollView.delegate        = self;
+    headerScrollView.backgroundColor = FLEXColor.secondaryGroupedBackgroundColor;
+    self.headerScrollView            = headerScrollView;
     
     [self addSubview:headerScrollView];
 }
 
 - (void)loadContentScrollView {
-    
     UIScrollView *scrollView = [UIScrollView new];
     scrollView.bounces       = NO;
     scrollView.delegate      = self;
@@ -103,82 +120,94 @@ static const CGFloat kColumnMargin = 1;
     tableView.delegate       = self;
     tableView.dataSource     = self;
     tableView.separatorStyle = UITableViewCellSeparatorStyleNone;
+    [tableView registerClass:[FLEXDBQueryRowCell class]
+        forCellReuseIdentifier:kFLEXDBQueryRowCellReuse
+    ];
     
-    [self addSubview:scrollView];
     [scrollView addSubview:tableView];
+    [self addSubview:scrollView];
     
     self.contentScrollView = scrollView;
-    self.contentTableView    = tableView;
-    
+    self.contentTableView  = tableView;
 }
 
 - (void)loadLeftView {
-    UITableView *leftTableView = [UITableView new];
+    UITableView *leftTableView   = [UITableView new];
     leftTableView.delegate       = self;
     leftTableView.dataSource     = self;
     leftTableView.separatorStyle = UITableViewCellSeparatorStyleNone;
     self.leftTableView           = leftTableView;
     [self addSubview:leftTableView];
     
-    UIView *leftHeader = [UIView new];
-    leftHeader.backgroundColor = [UIColor colorWithWhite:0.950 alpha:0.668];
+    UIView *leftHeader         = [UIView new];
+    leftHeader.backgroundColor = FLEXColor.secondaryBackgroundColor;
     self.leftHeader            = leftHeader;
     [self addSubview:leftHeader];
-    
 }
 
 
 #pragma mark - Data
 
+- (void)reloadData {
+    [self loadHeaderData];
+    [self loadLeftViewData];
+    [self loadContentData];
+}
+
 - (void)loadHeaderData {
-    NSArray<UIView *> *subviews = self.headerScrollView.subviews;
-    
-    for (UIView *subview in subviews) {
+    // Remove existing headers, if any
+    for (UIView *subview in self.headerViews) {
         [subview removeFromSuperview];
     }
-    CGFloat x = 0.0;
-    CGFloat w = 0.0;
-    for (int i = 0; i < [self numberOfColumns] ; i++) {
-        w = [self contentWidthForColumn:i] + [self columnMargin];
+    
+    __block CGFloat xOffset = 0;
+    
+    self.headerViews = [NSArray flex_forEachUpTo:self.numberOfColumns map:^id(NSUInteger column) {
+        FLEXTableColumnHeader *header = [FLEXTableColumnHeader new];
+        header.titleLabel.text = [self columnTitle:column];
         
-        FLEXTableColumnHeader *cell = [[FLEXTableColumnHeader alloc] initWithFrame:CGRectMake(x, 0, w, [self topHeaderHeight] - 1)];
-        cell.label.text = [self columnTitleForColumn:i];
-        [self.headerScrollView addSubview:cell];
+        CGSize fittingSize = CGSizeMake(CGFLOAT_MAX, self.topHeaderHeight - 1);
+        CGFloat width = self.columnMargin + MAX(
+            [self minContentWidthForColumn:column],
+            [header sizeThatFits:fittingSize].width
+        );
+        header.frame = CGRectMake(xOffset, 0, width, self.topHeaderHeight - 1);
+
+        if (column == self.sortColumn) {
+            header.sortType = self.sortType;
+        }
         
-        FLEXTableColumnHeaderSortType type = [self.sortStatusDict[[self columnTitleForColumn:i]] integerValue];
-        [cell changeSortStatusWithType:type];
+        // Header tap gesture
+        UITapGestureRecognizer *gesture = [[UITapGestureRecognizer alloc]
+            initWithTarget:self action:@selector(contentHeaderTap:)
+        ];
+        [header addGestureRecognizer:gesture];
+        header.userInteractionEnabled = YES;
         
-        UITapGestureRecognizer *gesture = [[UITapGestureRecognizer alloc] initWithTarget:self
-                                                                                  action:@selector(contentHeaderTap:)];
-        [cell addGestureRecognizer:gesture];
-        cell.userInteractionEnabled = YES;
-        
-        x = x + w;
-    }
+        xOffset += width;
+        [self.headerScrollView addSubview:header];
+        return header;
+    }];
 }
 
 - (void)contentHeaderTap:(UIGestureRecognizer *)gesture {
-    FLEXTableColumnHeader *header = (FLEXTableColumnHeader *)gesture.view;
-    NSString *string = header.label.text;
-    FLEXTableColumnHeaderSortType currentType = [self.sortStatusDict[string] integerValue];
-    FLEXTableColumnHeaderSortType newType ;
+    NSInteger newSortColumn = [self.headerViews indexOfObject:gesture.view];
+    FLEXTableColumnHeaderSortType newType = FLEXNextTableColumnHeaderSortType(self.sortType);
     
-    switch (currentType) {
-        case FLEXTableColumnHeaderSortTypeNone:
-            newType = FLEXTableColumnHeaderSortTypeAsc;
-            break;
-        case FLEXTableColumnHeaderSortTypeAsc:
-            newType = FLEXTableColumnHeaderSortTypeDesc;
-            break;
-        case FLEXTableColumnHeaderSortTypeDesc:
-            newType = FLEXTableColumnHeaderSortTypeAsc;
-            break;
-    }
+    // Reset old header
+    FLEXTableColumnHeader *oldHeader = (id)self.headerViews[self.sortColumn];
+    oldHeader.sortType = FLEXTableColumnHeaderSortTypeNone;
     
-    self.sortStatusDict = @{header.label.text : @(newType)};
-    [header changeSortStatusWithType:newType];
-    [self.delegate multiColumnTableView:self didTapHeaderWithText:string sortType:newType];
+    // Update new header
+    FLEXTableColumnHeader *newHeader = (id)self.headerViews[newSortColumn];
+    newHeader.sortType = newType;
     
+    // Update self
+    self.sortColumn = newSortColumn;
+    self.sortType = newType;
+
+    // Notify delegate
+    [self.delegate multiColumnTableView:self didSelectHeaderForColumn:newSortColumn sortType:newType];
 }
 
 - (void)loadContentData {
@@ -189,39 +218,30 @@ static const CGFloat kColumnMargin = 1;
     [self.leftTableView reloadData];
 }
 
-- (UITableViewCell *)tableView:(UITableView *)tableView
-         cellForRowAtIndexPath:(NSIndexPath *)indexPath {
-    UIColor *backgroundColor = UIColor.whiteColor;
+- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
+    // Alternating background color
+    UIColor *backgroundColor = FLEXColor.primaryBackgroundColor;
     if (indexPath.row % 2 != 0) {
-        backgroundColor = [UIColor colorWithWhite:0.950 alpha:0.750];
+        backgroundColor = FLEXColor.secondaryBackgroundColor;
     }
     
-    if (tableView != self.leftTableView) {
-        self.rowData = [self.dataSource contentAtRow:indexPath.row];
-        FLEXTableContentCell *cell = [FLEXTableContentCell cellWithTableView:tableView
-                                                                columnNumber:[self numberOfColumns]];
+    // Left side table view for row numbers
+    if (tableView == self.leftTableView) {
+        FLEXTableLeftCell *cell = [FLEXTableLeftCell cellWithTableView:tableView];
         cell.contentView.backgroundColor = backgroundColor;
-        cell.delegate = self;
-        
-        for (int i = 0 ; i < cell.labels.count; i++) {
-            
-            UILabel *label  = cell.labels[i];
-            label.textColor = UIColor.blackColor;
-            
-            NSString *content = [NSString stringWithFormat:@"%@",self.rowData[i]];
-            if ([content isEqualToString:@"<null>"]) {
-                label.textColor = UIColor.lightGrayColor;
-                content = @"NULL";
-            }
-            label.text            = content;
-            label.backgroundColor = backgroundColor;
-        }
+        cell.titlelabel.text = [self rowTitle:indexPath.row];
         return cell;
     }
+    // Right side table view for data
     else {
-        FLEXTableLeftCell *cell          = [FLEXTableLeftCell cellWithTableView:tableView];
+        FLEXDBQueryRowCell *cell = [tableView
+            dequeueReusableCellWithIdentifier:kFLEXDBQueryRowCellReuse forIndexPath:indexPath
+        ];
+        
         cell.contentView.backgroundColor = backgroundColor;
-        cell.titlelabel.text             = [self rowTitleForRow:indexPath.row];
+        cell.data = [self.dataSource contentForRow:indexPath.row];
+        cell.layoutSource = self;
+        NSAssert(cell.data.count == self.numberOfColumns, @"Count of data provided was incorrect");
         return cell;
     }
 }
@@ -230,12 +250,11 @@ static const CGFloat kColumnMargin = 1;
     return [self.dataSource numberOfRowsInTableView:self];
 }
 
-
 - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
     return [self.dataSource multiColumnTableView:self heightForContentCellInRow:indexPath.row];
 }
 
-
+// Scroll all scroll views in sync
 - (void)scrollViewDidScroll:(UIScrollView *)scrollView {
     if (scrollView == self.contentScrollView) {
         self.headerScrollView.contentOffset = scrollView.contentOffset;
@@ -251,23 +270,34 @@ static const CGFloat kColumnMargin = 1;
     }
 }
 
-#pragma mark -
+
 #pragma mark UITableView Delegate
 
 - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
     if (tableView == self.leftTableView) {
-        [self.contentTableView selectRowAtIndexPath:indexPath
-                                           animated:NO
-                                     scrollPosition:UITableViewScrollPositionNone];
+        [self.contentTableView
+            selectRowAtIndexPath:indexPath
+            animated:NO
+            scrollPosition:UITableViewScrollPositionNone
+        ];
     }
     else if (tableView == self.contentTableView) {
-        [self.leftTableView selectRowAtIndexPath:indexPath
-                                        animated:NO
-                                  scrollPosition:UITableViewScrollPositionNone];
+        [self.delegate multiColumnTableView:self didSelectRow:indexPath.row];
     }
 }
 
-#pragma mark -
+
+#pragma mark FLEXDBQueryRowCellLayoutSource
+
+- (CGFloat)dbQueryRowCell:(FLEXDBQueryRowCell *)dbQueryRowCell minXForColumn:(NSUInteger)column {
+    return CGRectGetMinX(self.headerViews[column].frame);
+}
+
+- (CGFloat)dbQueryRowCell:(FLEXDBQueryRowCell *)dbQueryRowCell widthForColumn:(NSUInteger)column {
+    return CGRectGetWidth(self.headerViews[column].bounds);
+}
+
+
 #pragma mark DataSource Accessor
 
 - (NSInteger)numberOfRows {
@@ -278,20 +308,16 @@ static const CGFloat kColumnMargin = 1;
     return [self.dataSource numberOfColumnsInTableView:self];
 }
 
-- (NSString *)columnTitleForColumn:(NSInteger)column {
-    return [self.dataSource columnNameInColumn:column];
+- (NSString *)columnTitle:(NSInteger)column {
+    return [self.dataSource columnTitle:column];
 }
 
-- (NSString *)rowTitleForRow:(NSInteger)row {
-    return [self.dataSource rowNameInRow:row];
+- (NSString *)rowTitle:(NSInteger)row {
+    return [self.dataSource rowTitle:row];
 }
 
-- (NSString *)contentAtColumn:(NSInteger)column row:(NSInteger)row; {
-    return [self.dataSource contentAtColumn:column row:row];
-}
-
-- (CGFloat)contentWidthForColumn:(NSInteger)column {
-    return [self.dataSource multiColumnTableView:self widthForContentCellInColumn:column];
+- (CGFloat)minContentWidthForColumn:(NSInteger)column {
+    return [self.dataSource multiColumnTableView:self minWidthForContentCellInColumn:column];
 }
 
 - (CGFloat)contentHeightForRow:(NSInteger)row {
@@ -310,9 +336,4 @@ static const CGFloat kColumnMargin = 1;
     return kColumnMargin;
 }
 
-
-- (void)tableContentCell:(FLEXTableContentCell *)tableView labelDidTapWithText:(NSString *)text {
-    [self.delegate multiColumnTableView:self didTapLabelWithText:text];
-}
-
 @end

Classes/GlobalStateExplorers/DatabaseBrowser/FLEXRealmDatabaseManager.m

@@ -7,6 +7,8 @@
 //
 
 #import "FLEXRealmDatabaseManager.h"
+#import "NSArray+FLEX.h"
+#import "FLEXSQLResult.h"
 
 #if __has_include(<Realm/Realm.h>)
 #import <Realm/Realm.h>
@@ -18,92 +20,83 @@
 @interface FLEXRealmDatabaseManager ()
 
 @property (nonatomic, copy) NSString *path;
-@property (nonatomic) RLMRealm * realm;
+@property (nonatomic) RLMRealm *realm;
 
 @end
 
-//#endif
-
 @implementation FLEXRealmDatabaseManager
+static Class RLMRealmClass = nil;
 
-- (instancetype)initWithPath:(NSString*)aPath {
-    Class realmClass = NSClassFromString(@"RLMRealm");
-    if (realmClass == nil) {
++ (void)load {
+    RLMRealmClass = NSClassFromString(@"RLMRealm");
+}
+
++ (instancetype)managerForDatabase:(NSString *)path {
+    return [[self alloc] initWithPath:path];
+}
+
+- (instancetype)initWithPath:(NSString *)path {
+    if (!RLMRealmClass) {
         return nil;
     }
     
     self = [super init];
-    
     if (self) {
-        _path = aPath;
+        _path = path;
+        
+        if (![self open]) {
+            return nil;
+        }
     }
+    
     return self;
 }
 
 - (BOOL)open {
-    Class realmClass = NSClassFromString(@"RLMRealm");
     Class configurationClass = NSClassFromString(@"RLMRealmConfiguration");
-    
-    if (realmClass == nil || configurationClass == nil) {
+    if (!RLMRealmClass || !configurationClass) {
         return NO;
     }
     
     NSError *error = nil;
     id configuration = [configurationClass new];
     [(RLMRealmConfiguration *)configuration setFileURL:[NSURL fileURLWithPath:self.path]];
-    self.realm = [realmClass realmWithConfiguration:configuration error:&error];
+    self.realm = [RLMRealmClass realmWithConfiguration:configuration error:&error];
+    
     return (error == nil);
 }
 
-- (NSArray<NSDictionary<NSString *, id> *> *)queryAllTables {
-    NSMutableArray<NSDictionary<NSString *, id> *> *allTables = [NSMutableArray array];
-    RLMSchema *schema = [self.realm schema];
-    
-    for (RLMObjectSchema *objectSchema in schema.objectSchema) {
-        if (objectSchema.className == nil) {
-            continue;
-        }
-        
-        NSDictionary<NSString *, id> *dictionary = @{@"name":objectSchema.className};
-        [allTables addObject:dictionary];
-    }
-    
-    return allTables;
+- (NSArray<NSString *> *)queryAllTables {
+    // Map each schema to its name
+    NSArray<NSString *> *tableNames = [self.realm.schema.objectSchema flex_mapped:^id(RLMObjectSchema *schema, NSUInteger idx) {
+        return schema.className ?: nil;
+    }];
+
+    return [tableNames sortedArrayUsingSelector:@selector(localizedCaseInsensitiveCompare:)];
 }
 
-- (NSArray<NSString *> *)queryAllColumnsWithTableName:(NSString *)tableName {
-    RLMObjectSchema *objectSchema = [[self.realm schema] schemaForClassName:tableName];
-    if (objectSchema == nil) {
-        return nil;
-    }
-    
-    NSMutableArray<NSString *> *columnNames = [NSMutableArray array];
-    for (RLMProperty *property in objectSchema.properties) {
-        [columnNames addObject:property.name];
-    }
-    
-    return columnNames;
+- (NSArray<NSString *> *)queryAllColumnsOfTable:(NSString *)tableName {
+    RLMObjectSchema *objectSchema = [self.realm.schema schemaForClassName:tableName];
+    // Map each column to its name
+    return [objectSchema.properties flex_mapped:^id(RLMProperty *property, NSUInteger idx) {
+        return property.name;
+    }];
 }
 
-- (NSArray<NSDictionary<NSString *, id> *> *)queryAllDataWithTableName:(NSString *)tableName {
-    RLMObjectSchema *objectSchema = [[self.realm schema] schemaForClassName:tableName];
+- (NSArray<NSArray *> *)queryAllDataInTable:(NSString *)tableName {
+    RLMObjectSchema *objectSchema = [self.realm.schema schemaForClassName:tableName];
     RLMResults *results = [self.realm allObjects:tableName];
-    if (results.count == 0 || objectSchema == nil) {
+    if (results.count == 0 || !objectSchema) {
         return nil;
     }
     
-    NSMutableArray<NSDictionary<NSString *, id> *> *allDataEntries = [NSMutableArray array];
-    for (RLMObject *result in results) {
-        NSMutableDictionary<NSString *, id> *entry = [NSMutableDictionary dictionary];
-        for (RLMProperty *property in objectSchema.properties) {
-            id value = [result valueForKey:property.name];
-            entry[property.name] = (value) ? (value) : [NSNull null];
-        }
-        
-        [allDataEntries addObject:entry];
-    }
-    
-    return allDataEntries;
+    // Map results to an array of rows
+    return [NSArray flex_mapped:results block:^id(RLMObject *result, NSUInteger idx) {
+        // Map each row to an array of the values of its properties 
+        return [objectSchema.properties flex_mapped:^id(RLMProperty *property, NSUInteger idx) {
+            return [result valueForKey:property.name] ?: NSNull.null;
+        }];
+    }];
 }
 
 @end

Classes/GlobalStateExplorers/DatabaseBrowser/FLEXSQLResult.h

@@ -0,0 +1,48 @@
+//
+//  FLEXSQLResult.h
+//  FLEX
+//
+//  Created by Tanner on 3/3/20.
+//  Copyright © 2020 FLEX Team. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface FLEXSQLResult : NSObject
+
+/// Describes the result of a non-select query, or an error of any kind of query
++ (instancetype)message:(NSString *)message;
+/// Describes the result of a known failed execution
++ (instancetype)error:(NSString *)message;
+
+/// @param rowData A list of rows, where each element in the row
+/// corresponds to the column given in /c columnNames
++ (instancetype)columns:(NSArray<NSString *> *)columnNames
+                rows:(NSArray<NSArray<NSString *> *> *)rowData;
+
+@property (nonatomic, readonly, nullable) NSString *message;
+
+/// A value of YES means this is surely an error,
+/// but it still might be an error even with a value of NO
+@property (nonatomic, readonly) BOOL isError;
+
+/// A list of column names
+@property (nonatomic, readonly, nullable) NSArray<NSString *> *columns;
+/// A list of rows, where each element in the row corresponds
+/// to the value of the column at the same index in \c columns.
+///
+/// That is, given a row, looping over the contents of the row and
+/// the contents of \c columns will give you key-value pairs of
+/// column names to column values for that row.
+@property (nonatomic, readonly, nullable) NSArray<NSArray<NSString *> *> *rows;
+/// A list of rows where the fields are paired to column names.
+///
+/// This property is lazily constructed by looping over
+/// the rows and columns present in the other two properties.
+@property (nonatomic, readonly, nullable) NSArray<NSDictionary<NSString *, id> *> *keyedRows;
+
+@end
+
+NS_ASSUME_NONNULL_END

Classes/GlobalStateExplorers/DatabaseBrowser/FLEXSQLResult.m

@@ -0,0 +1,53 @@
+//
+//  FLEXSQLResult.m
+//  FLEX
+//
+//  Created by Tanner on 3/3/20.
+//  Copyright © 2020 FLEX Team. All rights reserved.
+//
+
+#import "FLEXSQLResult.h"
+#import "NSArray+FLEX.h"
+
+@implementation FLEXSQLResult
+@synthesize keyedRows = _keyedRows;
+
++ (instancetype)message:(NSString *)message {
+    return [[self alloc] initWithmessage:message columns:nil rows:nil];
+}
+
++ (instancetype)error:(NSString *)message {
+    FLEXSQLResult *result = [self message:message];
+    result->_isError = YES;
+    return result;
+}
+
++ (instancetype)columns:(NSArray<NSString *> *)columnNames rows:(NSArray<NSArray<NSString *> *> *)rowData {
+    return [[self alloc] initWithmessage:nil columns:columnNames rows:rowData];
+}
+
+- (id)initWithmessage:(NSString *)message columns:(NSArray *)columns rows:(NSArray<NSArray *> *)rows {
+    NSParameterAssert(message || (columns && rows));
+    NSParameterAssert(columns.count == rows.firstObject.count);
+    
+    self = [super init];
+    if (self) {
+        _message = message;
+        _columns = columns;
+        _rows = rows;
+    }
+    
+    return self;
+}
+
+- (NSArray<NSDictionary<NSString *,id> *> *)keyedRows {
+    if (!_keyedRows) {
+        _keyedRows = [self.rows flex_mapped:^id(NSArray<NSString *> *row, NSUInteger idx) {
+            return [NSDictionary dictionaryWithObjects:row forKeys:self.columns];
+        }];
+    }
+    
+    return _keyedRows;
+}
+
+@end

Classes/GlobalStateExplorers/DatabaseBrowser/FLEXSQLiteDatabaseManager.h

@@ -13,7 +13,20 @@
 
 #import <Foundation/Foundation.h>
 #import "FLEXDatabaseManager.h"
+#import "FLEXSQLResult.h"
 
 @interface FLEXSQLiteDatabaseManager : NSObject <FLEXDatabaseManager>
 
+/// Contains the result of the last operation, which may be an error
+@property (nonatomic, readonly) FLEXSQLResult *lastResult;
+/// Calls into \c sqlite3_last_insert_rowid()
+@property (nonatomic, readonly) NSInteger lastRowID;
+
+/// Given a statement like 'SELECT * from @table where @col = @val' and arguments
+/// like { @"table": @"Album", @"col": @"year", @"val" @1 } this method will
+/// invoke the statement and properly bind the given arguments to the statement.
+///
+/// You may pass NSStrings, NSData, NSNumbers, or NSNulls as values.
+- (FLEXSQLResult *)executeStatement:(NSString *)statement arguments:(NSDictionary<NSString *, id> *)args;
+
 @end

Classes/GlobalStateExplorers/DatabaseBrowser/FLEXSQLiteDatabaseManager.m

@@ -8,60 +8,71 @@
 
 #import "FLEXSQLiteDatabaseManager.h"
 #import "FLEXManager.h"
+#import "NSArray+FLEX.h"
+#import "FLEXRuntimeConstants.h"
 #import <sqlite3.h>
 
+static NSString * const QUERY_TABLENAMES = @"SELECT name FROM sqlite_master WHERE type='table' ORDER BY name";
 
-static NSString *const QUERY_TABLENAMES_SQL = @"SELECT name FROM sqlite_master WHERE type='table' ORDER BY name";
+@interface FLEXSQLiteDatabaseManager ()
+@property (nonatomic) sqlite3 *db;
+@property (nonatomic, copy) NSString *path;
+@end
 
-@implementation FLEXSQLiteDatabaseManager {
-    sqlite3* _db;
-    NSString* _databasePath;
+@implementation FLEXSQLiteDatabaseManager
+
+#pragma mark - FLEXDatabaseManager
+
++ (instancetype)managerForDatabase:(NSString *)path {
+    return [[self alloc] initWithPath:path];
 }
 
-- (instancetype)initWithPath:(NSString*)aPath {
+- (instancetype)initWithPath:(NSString *)path {
     self = [super init];
-    
     if (self) {
-        _databasePath = [aPath copy];
+        self.path = path;
     }
+    
     return self;
 }
 
+- (void)dealloc {
+    [self close];
+}
+
 - (BOOL)open {
-    if (_db) {
+    if (self.db) {
         return YES;
     }
-    int err = sqlite3_open(_databasePath.UTF8String, &_db);
+    
+    int err = sqlite3_open(self.path.UTF8String, &_db);
 
 #if SQLITE_HAS_CODEC
-    NSString *defaultSqliteDatabasePassword = [FLEXManager sharedManager].defaultSqliteDatabasePassword;
-
+    NSString *defaultSqliteDatabasePassword = FLEXManager.sharedManager.defaultSqliteDatabasePassword;
     if (defaultSqliteDatabasePassword) {
         const char *key = defaultSqliteDatabasePassword.UTF8String;
-
         sqlite3_key(_db, key, (int)strlen(key));
     }
 #endif
 
-    if(err != SQLITE_OK) {
-        NSLog(@"error opening!: %d", err);
-        return NO;
+    if (err != SQLITE_OK) {
+        return [self storeErrorForLastTask:@"Open"];
     }
+    
     return YES;
 }
-
+    
 - (BOOL)close {
-    if (!_db) {
+    if (!self.db) {
         return YES;
     }
     
     int  rc;
-    BOOL retry;
-    BOOL triedFinalizingOpenStatements = NO;
+    BOOL retry, triedFinalizingOpenStatements = NO;
     
     do {
-        retry   = NO;
-        rc      = sqlite3_close(_db);
+        retry = NO;
+        rc    = sqlite3_close(_db);
         if (SQLITE_BUSY == rc || SQLITE_LOCKED == rc) {
             if (!triedFinalizingOpenStatements) {
                 triedFinalizingOpenStatements = YES;
@@ -72,126 +83,231 @@ static NSString *const QUERY_TABLENAMES_SQL = @"SELECT name FROM sqlite_master W
                     retry = YES;
                 }
             }
+        } else if (SQLITE_OK != rc) {
+            [self storeErrorForLastTask:@"Close"];
+            self.db = nil;
+            return NO;
         }
-        else if (SQLITE_OK != rc) {
-            NSLog(@"error closing!: %d", rc);
-        }
-    }
-    while (retry);
+    } while (retry);
     
-    _db = nil;
+    self.db = nil;
     return YES;
 }
 
-
-- (NSArray<NSDictionary<NSString *, id> *> *)queryAllTables {
-    return [self executeQuery:QUERY_TABLENAMES_SQL];
+- (NSInteger)lastRowID {
+    return (NSInteger)sqlite3_last_insert_rowid(self.db);
 }
 
-- (NSArray<NSString *> *)queryAllColumnsWithTableName:(NSString *)tableName {
+- (NSArray<NSString *> *)queryAllTables {
+    return [[self executeStatement:QUERY_TABLENAMES].rows flex_mapped:^id(NSArray *table, NSUInteger idx) {
+        return table.firstObject;
+    }] ?: @[];
+}
+
+- (NSArray<NSString *> *)queryAllColumnsOfTable:(NSString *)tableName {
     NSString *sql = [NSString stringWithFormat:@"PRAGMA table_info('%@')",tableName];
-    NSArray<NSDictionary<NSString *, id> *> *resultArray =  [self executeQuery:sql];
-    NSMutableArray<NSString *> *array = [NSMutableArray array];
-    for (NSDictionary<NSString *, id> *dict in resultArray) {
-        NSString *columnName = (NSString *)dict[@"name"] ?: @"";
-        [array addObject:columnName];
-    }
-    return array;
+    FLEXSQLResult *results = [self executeStatement:sql];
+
+    return [results.keyedRows flex_mapped:^id(NSDictionary *column, NSUInteger idx) {
+        return column[@"name"];
+    }] ?: @[];
 }
 
-- (NSArray<NSDictionary<NSString *, id> *> *)queryAllDataWithTableName:(NSString *)tableName {
-    NSString *sql = [NSString stringWithFormat:@"SELECT * FROM %@",tableName];
-    return [self executeQuery:sql];
+- (NSArray<NSArray *> *)queryAllDataInTable:(NSString *)tableName {
+    NSString *command = [NSString stringWithFormat:@"SELECT * FROM \"%@\"", tableName];
+    return [self executeStatement:command].rows ?: @[];
 }
 
-#pragma mark -
-#pragma mark - Private
+- (NSArray<NSString *> *)queryRowIDsInTable:(NSString *)tableName {
+    NSString *command = [NSString stringWithFormat:@"SELECT rowid FROM \"%@\"", tableName];
+    NSArray<NSArray<NSString *> *> *data = [self executeStatement:command].rows ?: @[];
+    
+    return [data flex_mapped:^id(NSArray<NSString *> *obj, NSUInteger idx) {
+        return obj.firstObject;
+    }];
+}
 
-- (NSArray<NSDictionary<NSString *, id> *> *)executeQuery:(NSString *)sql {
+- (FLEXSQLResult *)executeStatement:(NSString *)sql {
+    return [self executeStatement:sql arguments:nil];
+}
+
+- (FLEXSQLResult *)executeStatement:(NSString *)sql arguments:(NSDictionary *)args {
     [self open];
-    NSMutableArray<NSDictionary<NSString *, id> *> *resultArray = [NSMutableArray array];
+    
+    FLEXSQLResult *result = nil;
+    
     sqlite3_stmt *pstmt;
-    if (sqlite3_prepare_v2(_db, sql.UTF8String, -1, &pstmt, 0) == SQLITE_OK) {
-        while (sqlite3_step(pstmt) == SQLITE_ROW) {
-            NSUInteger num_cols = (NSUInteger)sqlite3_data_count(pstmt);
-            if (num_cols > 0) {
-                NSMutableDictionary<NSString *, id> *dict = [NSMutableDictionary dictionaryWithCapacity:num_cols];
-                
-                int columnCount = sqlite3_column_count(pstmt);
-                
-                int columnIdx = 0;
-                for (columnIdx = 0; columnIdx < columnCount; columnIdx++) {
-                    
-                    NSString *columnName = [NSString stringWithUTF8String:sqlite3_column_name(pstmt, columnIdx)];
-                    id objectValue = [self objectForColumnIndex:columnIdx stmt:pstmt];
-                    [dict setObject:objectValue forKey:columnName];
-                }
-                [resultArray addObject:dict];
+    int status;
+    if ((status = sqlite3_prepare_v2(_db, sql.UTF8String, -1, &pstmt, 0)) == SQLITE_OK) {
+        NSMutableArray<NSArray *> *rows = [NSMutableArray new];
+        
+        // Bind parameters, if any
+        if (![self bindParameters:args toStatement:pstmt]) {
+            return self.lastResult;
+        }
+        
+        // Grab columns
+        int columnCount = sqlite3_column_count(pstmt);
+        NSArray<NSString *> *columns = [NSArray flex_forEachUpTo:columnCount map:^id(NSUInteger i) {
+            return @(sqlite3_column_name(pstmt, (int)i));
+        }];
+        
+        // Execute statement
+        while ((status = sqlite3_step(pstmt)) == SQLITE_ROW) {
+            // Grab rows if this is a selection query
+            int dataCount = sqlite3_data_count(pstmt);
+            if (dataCount > 0) {
+                [rows addObject:[NSArray flex_forEachUpTo:columnCount map:^id(NSUInteger i) {
+                    return [self objectForColumnIndex:(int)i stmt:pstmt];
+                }]];
             }
         }
+        
+        if (status == SQLITE_DONE) {
+            if (rows.count) {
+                // We selected some rows
+                result = _lastResult = [FLEXSQLResult columns:columns rows:rows];
+            } else {
+                // We executed a query like INSERT, UDPATE, or DELETE
+                int rowsAffected = sqlite3_changes(_db);
+                NSString *message = [NSString stringWithFormat:@"%d row(s) affected", rowsAffected];
+                result = _lastResult = [FLEXSQLResult message:message];
+            }
+        } else {
+            // An error occured executing the query
+            result = _lastResult = [self errorResult:@"Execution"];
+        }
+    } else {
+        // An error occurred creating the prepared statement
+        result = _lastResult = [self errorResult:@"Prepared statement"];
     }
-    [self close];
-    return resultArray;
+    
+    sqlite3_finalize(pstmt);
+    return result;
 }
 
 
+#pragma mark - Private
+
+/// @return YES on success, NO if an error was encountered and stored in \c lastResult
+- (BOOL)bindParameters:(NSDictionary *)args toStatement:(sqlite3_stmt *)pstmt {
+    for (NSString *param in args.allKeys) {
+        int status = SQLITE_OK, idx = sqlite3_bind_parameter_index(pstmt, param.UTF8String);
+        id value = args[param];
+        
+        if (idx == 0) {
+            // No parameter matching that arg
+            @throw NSInternalInconsistencyException;
+        }
+        
+        // Null
+        if ([value isKindOfClass:[NSNull class]]) {
+            status = sqlite3_bind_null(pstmt, idx);
+        }
+        // String params
+        else if ([value isKindOfClass:[NSString class]]) {
+            const char *str = [value UTF8String];
+            status = sqlite3_bind_text(pstmt, idx, str, (int)strlen(str), SQLITE_TRANSIENT);
+        }
+        // Data params
+        else if ([value isKindOfClass:[NSData class]]) {
+            const void *blob = [value bytes];
+            status = sqlite3_bind_blob64(pstmt, idx, blob, [value length], SQLITE_TRANSIENT);
+        }
+        // Primitive params
+        else if ([value isKindOfClass:[NSNumber class]]) {
+            FLEXTypeEncoding type = [value objCType][0];
+            switch (type) {
+                case FLEXTypeEncodingCBool:
+                case FLEXTypeEncodingChar:
+                case FLEXTypeEncodingUnsignedChar:
+                case FLEXTypeEncodingShort:
+                case FLEXTypeEncodingUnsignedShort:
+                case FLEXTypeEncodingInt:
+                case FLEXTypeEncodingUnsignedInt:
+                case FLEXTypeEncodingLong:
+                case FLEXTypeEncodingUnsignedLong:
+                case FLEXTypeEncodingLongLong:
+                case FLEXTypeEncodingUnsignedLongLong:
+                    status = sqlite3_bind_int64(pstmt, idx, (sqlite3_int64)[value longValue]);
+                    break;
+                
+                case FLEXTypeEncodingFloat:
+                case FLEXTypeEncodingDouble:
+                    status = sqlite3_bind_double(pstmt, idx, [value doubleValue]);
+                    break;
+                    
+                default:
+                    @throw NSInternalInconsistencyException;
+                    break;
+            }
+        }
+        // Unsupported type
+        else {
+            @throw NSInternalInconsistencyException;
+        }
+        
+        if (status != SQLITE_OK) {
+            return [self storeErrorForLastTask:
+                [NSString stringWithFormat:@"Binding param named '%@'", param]
+            ];
+        }
+    }
+    
+    return YES;
+}
+
+- (BOOL)storeErrorForLastTask:(NSString *)action {
+    _lastResult = [self errorResult:action];
+    return NO;
+}
+
+- (FLEXSQLResult *)errorResult:(NSString *)description {
+    const char *error = sqlite3_errmsg(_db);
+    NSString *message = error ? @(error) : [NSString
+        stringWithFormat:@"(%@: empty error)", description
+    ];
+    
+    return [FLEXSQLResult error:message];
+}
+
 - (id)objectForColumnIndex:(int)columnIdx stmt:(sqlite3_stmt*)stmt {
     int columnType = sqlite3_column_type(stmt, columnIdx);
     
-    id returnValue = nil;
-    
-    if (columnType == SQLITE_INTEGER) {
-        returnValue =  [NSNumber numberWithLongLong:sqlite3_column_int64(stmt, columnIdx)];
+    switch (columnType) {
+        case SQLITE_INTEGER:
+            return @(sqlite3_column_int64(stmt, columnIdx)).stringValue;
+        case SQLITE_FLOAT:
+            return  @(sqlite3_column_double(stmt, columnIdx)).stringValue;
+        case SQLITE_BLOB:
+            return [NSString stringWithFormat:@"Data (%@ bytes)",
+                @([self dataForColumnIndex:columnIdx stmt:stmt].length)
+            ];
+            
+        default:
+            // Default to a string for everything else
+            return [self stringForColumnIndex:columnIdx stmt:stmt] ?: NSNull.null;
     }
-    else if (columnType == SQLITE_FLOAT) {
-        returnValue = [NSNumber numberWithDouble:sqlite3_column_double(stmt, columnIdx)];
-    }
-    else if (columnType == SQLITE_BLOB) {
-        returnValue = [self dataForColumnIndex:columnIdx stmt:stmt];
-    }
-    else {
-        //default to a string for everything else
-        returnValue = [self stringForColumnIndex:columnIdx stmt:stmt];
-    }
-    
-    if (returnValue == nil) {
-        returnValue = [NSNull null];
-    }
-    
-    return returnValue;
 }
-
+                
 - (NSString *)stringForColumnIndex:(int)columnIdx stmt:(sqlite3_stmt *)stmt {
+    if (sqlite3_column_type(stmt, columnIdx) == SQLITE_NULL || columnIdx < 0) {
+        return nil;
+    }
     
+    const char *text = (const char *)sqlite3_column_text(stmt, columnIdx);
+    return text ? @(text) : nil;
+}
+
+- (NSData *)dataForColumnIndex:(int)columnIdx stmt:(sqlite3_stmt *)stmt {
     if (sqlite3_column_type(stmt, columnIdx) == SQLITE_NULL || (columnIdx < 0)) {
         return nil;
     }
     
-    const char *c = (const char *)sqlite3_column_text(stmt, columnIdx);
+    const void *blob = sqlite3_column_blob(stmt, columnIdx);
+    NSInteger size = (NSInteger)sqlite3_column_bytes(stmt, columnIdx);
     
-    if (!c) {
-        // null row.
-        return nil;
-    }
-    
-    return [NSString stringWithUTF8String:c];
+    return blob ? [NSData dataWithBytes:blob length:size] : nil;
 }
 
-- (NSData *)dataForColumnIndex:(int)columnIdx stmt:(sqlite3_stmt *)stmt{
-    
-    if (sqlite3_column_type(stmt, columnIdx) == SQLITE_NULL || (columnIdx < 0)) {
-        return nil;
-    }
-    
-    const char *dataBuffer = sqlite3_column_blob(stmt, columnIdx);
-    int dataSize = sqlite3_column_bytes(stmt, columnIdx);
-    
-    if (dataBuffer == NULL) {
-        return nil;
-    }
-    
-    return [NSData dataWithBytes:(const void *)dataBuffer length:(NSUInteger)dataSize];
-}
-
-
 @end

Classes/GlobalStateExplorers/DatabaseBrowser/FLEXTableColumnHeader.h

@@ -14,11 +14,25 @@ typedef NS_ENUM(NSUInteger, FLEXTableColumnHeaderSortType) {
     FLEXTableColumnHeaderSortTypeDesc,
 };
 
+NS_INLINE FLEXTableColumnHeaderSortType FLEXNextTableColumnHeaderSortType(
+    FLEXTableColumnHeaderSortType current) {
+    switch (current) {
+        case FLEXTableColumnHeaderSortTypeAsc:
+            return FLEXTableColumnHeaderSortTypeDesc;
+        case FLEXTableColumnHeaderSortTypeNone:
+        case FLEXTableColumnHeaderSortTypeDesc:
+            return FLEXTableColumnHeaderSortTypeAsc;
+    }
+    
+    return FLEXTableColumnHeaderSortTypeNone;
+}
+
 @interface FLEXTableColumnHeader : UIView
 
-@property (nonatomic) UILabel *label;
+@property (nonatomic) NSInteger index;
+@property (nonatomic, readonly) UILabel *titleLabel;
 
-- (void)changeSortStatusWithType:(FLEXTableColumnHeaderSortType)type;
+@property (nonatomic) FLEXTableColumnHeaderSortType sortType;
 
 @end
 

Classes/GlobalStateExplorers/DatabaseBrowser/FLEXTableColumnHeader.m

@@ -7,36 +7,44 @@
 //
 
 #import "FLEXTableColumnHeader.h"
+#import "FLEXColor.h"
+#import "UIFont+FLEX.h"
+#import "FLEXUtility.h"
 
-@implementation FLEXTableColumnHeader {
-    UILabel *_arrowLabel;
-}
+static const CGFloat kMargin = 5;
+static const CGFloat kArrowWidth = 20;
 
+@interface FLEXTableColumnHeader ()
+@property (nonatomic, readonly) UILabel *arrowLabel;
+@property (nonatomic, readonly) UIView *lineView;
+@end
+
+@implementation FLEXTableColumnHeader
 
 - (instancetype)initWithFrame:(CGRect)frame {
     self = [super initWithFrame:frame];
     if (self) {
-        self.backgroundColor = UIColor.whiteColor;
+        self.backgroundColor = FLEXColor.secondaryBackgroundColor;
         
-        UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(5, 0, frame.size.width - 25, frame.size.height)];
-        label.font = [UIFont systemFontOfSize:13.0];
-        [self addSubview:label];
-        self.label = label;
+        _titleLabel = [UILabel new];
+        _titleLabel.font = UIFont.flex_defaultTableCellFont;
+        [self addSubview:_titleLabel];
         
-        
-        _arrowLabel = [[UILabel alloc] initWithFrame:CGRectMake(frame.size.width - 20, 0, 20, frame.size.height)];
-        _arrowLabel.font = [UIFont systemFontOfSize:13.0];
+        _arrowLabel = [UILabel new];
+        _arrowLabel.font = UIFont.flex_defaultTableCellFont;
         [self addSubview:_arrowLabel];
         
-        UIView *line = [[UIView alloc] initWithFrame:CGRectMake(frame.size.width - 1, 2, 1, frame.size.height - 4)];
-        line.backgroundColor = [UIColor colorWithWhite:0.803 alpha:0.850];
-        [self addSubview:line];
+        _lineView = [UIView new];
+        _lineView.backgroundColor = FLEXColor.hairlineColor;
+        [self addSubview:_lineView];
         
     }
     return self;
 }
 
-- (void)changeSortStatusWithType:(FLEXTableColumnHeaderSortType)type {
+- (void)setSortType:(FLEXTableColumnHeaderSortType)type {
+    _sortType = type;
+    
     switch (type) {
         case FLEXTableColumnHeaderSortTypeNone:
             _arrowLabel.text = @"";
@@ -50,8 +58,21 @@
     }
 }
 
+- (void)layoutSubviews {
+    [super layoutSubviews];
+    
+    CGSize size = self.frame.size;
+    
+    self.titleLabel.frame = CGRectMake(kMargin, 0, size.width - kArrowWidth - kMargin, size.height);
+    self.arrowLabel.frame = CGRectMake(size.width - kArrowWidth, 0, kArrowWidth, size.height);
+    self.lineView.frame = CGRectMake(size.width - 1, 2, FLEXPointsToPixels(1), size.height - 4);
+}
 
-
-
+- (CGSize)sizeThatFits:(CGSize)size {
+    CGFloat margins = kArrowWidth - 2 * kMargin;
+    size = CGSizeMake(size.width - margins, size.height);
+    CGFloat width = [_titleLabel sizeThatFits:size].width + margins;
+    return CGSizeMake(width, size.height);
+}
 
 @end

Classes/GlobalStateExplorers/DatabaseBrowser/FLEXTableContentCell.h

@@ -1,27 +0,0 @@
-//
-//  FLEXTableContentCell.h
-//  FLEX
-//
-//  Created by Peng Tao on 15/11/24.
-//  Copyright © 2015年 f. All rights reserved.
-//
-
-#import <UIKit/UIKit.h>
-
-@class FLEXTableContentCell;
-@protocol FLEXTableContentCellDelegate <NSObject>
-
-@optional
-- (void)tableContentCell:(FLEXTableContentCell *)tableView labelDidTapWithText:(NSString *)text;
-
-@end
-
-@interface FLEXTableContentCell : UITableViewCell
-
-@property (nonatomic) NSArray<UILabel *> *labels;
-
-@property (nonatomic, weak) id<FLEXTableContentCellDelegate> delegate;
-
-+ (instancetype)cellWithTableView:(UITableView *)tableView columnNumber:(NSInteger)number;
-
-@end

Classes/GlobalStateExplorers/DatabaseBrowser/FLEXTableContentCell.m

@@ -1,63 +0,0 @@
-//
-//  FLEXTableContentCell.m
-//  FLEX
-//
-//  Created by Peng Tao on 15/11/24.
-//  Copyright © 2015年 f. All rights reserved.
-//
-
-#import "FLEXTableContentCell.h"
-#import "FLEXMultiColumnTableView.h"
-
-@interface FLEXTableContentCell ()
-
-@end
-
-@implementation FLEXTableContentCell
-
-+ (instancetype)cellWithTableView:(UITableView *)tableView columnNumber:(NSInteger)number; {
-    static NSString *identifier = @"FLEXTableContentCell";
-    FLEXTableContentCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier];
-    if (!cell) {
-        cell = [[FLEXTableContentCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:identifier];
-        NSMutableArray<UILabel *> *labels = [NSMutableArray array];
-        for (int i = 0; i < number ; i++) {
-            UILabel *label = [[UILabel alloc] initWithFrame:CGRectZero];
-            label.backgroundColor = UIColor.whiteColor;
-            label.font            = [UIFont systemFontOfSize:13.0];
-            label.textAlignment   = NSTextAlignmentLeft;
-            label.backgroundColor = UIColor.greenColor;
-            [labels addObject:label];
-            
-            UITapGestureRecognizer *gesture = [[UITapGestureRecognizer alloc] initWithTarget:cell
-                                                                                      action:@selector(labelDidTap:)];
-            [label addGestureRecognizer:gesture];
-            label.userInteractionEnabled = YES;
-            
-            [cell.contentView addSubview:label];
-            cell.contentView.backgroundColor = UIColor.whiteColor;
-        }
-        cell.labels = labels;
-    }
-    return cell;
-}
-
-- (void)layoutSubviews {
-    [super layoutSubviews];
-    CGFloat labelWidth  = self.contentView.frame.size.width / self.labels.count;
-    CGFloat labelHeight = self.contentView.frame.size.height;
-    for (int i = 0; i < self.labels.count; i++) {
-        UILabel *label = self.labels[i];
-        label.frame = CGRectMake(labelWidth * i + 5, 0, (labelWidth - 10), labelHeight);
-    }
-}
-
-
-- (void)labelDidTap:(UIGestureRecognizer *)gesture {
-    UILabel *label = (UILabel *)gesture.view;
-    if ([self.delegate respondsToSelector:@selector(tableContentCell:labelDidTapWithText:)]) {
-        [self.delegate tableContentCell:self labelDidTapWithText:label.text];
-    }
-}
-
-@end