Add tabKeyAlwaysIndentsOutdents property

Library/macOSRichTextEditor.xcodeproj/project.xcworkspace/contents.xcworkspacedata

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "self:">
+   </FileRef>
+</Workspace>

Library/macOSRichTextEditor.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>

Library/macOSRichTextEditor/Source/RichTextEditor.h

@@ -129,6 +129,10 @@ typedef NS_OPTIONS(NSUInteger, RichTextEditorShortcut) {
 /// Minimum font size. Defaults to 10.0f.
 @property CGFloat minFontSize;
 
+/// true if tab should always indent and shift+tab should always outdent the current paragraph(s);
+/// false to let the tab key be used as normal
+@property BOOL tabKeyAlwaysIndentsOutdents;
+
 /// Pasteboard type string used when copying text from this NSTextView.
 +(NSString*)pasteboardDataType;
 

Library/macOSRichTextEditor/Source/RichTextEditor.m

@@ -184,6 +184,10 @@ typedef NS_ENUM(NSInteger, ParagraphIndentation) {
     if (self.delegate_interceptor.receiver && [self.delegate_interceptor.receiver respondsToSelector:@selector(textView:shouldChangeTextInRange:replacementString:)]) {
         return [self.delegate_interceptor.receiver textView:textView shouldChangeTextInRange:affectedCharRange replacementString:replacementString];
     }
+    if (self.tabKeyAlwaysIndentsOutdents && [replacementString isEqualToString:@"\t"] && affectedCharRange.length == 0) {
+        //[self userSelectedIncreaseIndent];
+        //return NO;
+    }
     return YES;
 }
 
@@ -1392,6 +1396,14 @@ typedef NS_ENUM(NSInteger, ParagraphIndentation) {
                  (enabledShortcuts == RichTextEditorShortcutAll || enabledShortcuts & RichTextEditorShortcutIncreaseIndent)) {
             [self userSelectedIncreaseIndent];
         }
+        else if (self.tabKeyAlwaysIndentsOutdents && keyChar == '\t' && !commandKeyDown && !shiftKeyDown &&
+                 (enabledShortcuts == RichTextEditorShortcutAll || enabledShortcuts & RichTextEditorShortcutIncreaseIndent)) {
+            [self userSelectedIncreaseIndent];
+        }
+        else if (self.tabKeyAlwaysIndentsOutdents && (keyChar == '\t' || keyChar == 25) && !commandKeyDown && shiftKeyDown &&
+                 (enabledShortcuts == RichTextEditorShortcutAll || enabledShortcuts & RichTextEditorShortcutIncreaseIndent)) {
+            [self userSelectedDecreaseIndent];
+        }
         else if (!([self.rteDelegate respondsToSelector:@selector(richTextEditor:keyDownEvent:)] && [self.rteDelegate richTextEditor:self keyDownEvent:event])) {
             [self sendDelegatePreviewChangeOfType:RichTextEditorPreviewChangeKeyDown];
             [super keyDown:event];