iska
156 lines
3.3 KiB
Objective-C
156 lines
3.3 KiB
Objective-C
//
|
|
// CSSCombinatorSelector.m
|
|
// HTMLKit
|
|
//
|
|
// Created by Iska on 12/10/15.
|
|
// Copyright © 2015 BrainCookie. All rights reserved.
|
|
//
|
|
|
|
#import "CSSCombinatorSelector.h"
|
|
#import "HTMLElement.h"
|
|
#import "HTMLNode+Private.h"
|
|
|
|
#pragma mark - Declarations
|
|
|
|
@interface CSSChildOfElementCombinatorSelector : CSSCombinatorSelector
|
|
@end
|
|
|
|
@interface CSSDecendantOfElementCombinatorSelector : CSSCombinatorSelector
|
|
@end
|
|
|
|
@interface CSSAdjacentSiblingCombinatorSelector : CSSCombinatorSelector
|
|
@end
|
|
|
|
@interface CSSGeneralSiblingCombinatorSelector : CSSCombinatorSelector
|
|
@end
|
|
|
|
#pragma mark - Base Combinator
|
|
|
|
@interface CSSCombinatorSelector ()
|
|
{
|
|
CSSSelector *_selector;
|
|
}
|
|
@property (nonatomic, strong, readonly) CSSSelector *selector;
|
|
@end
|
|
|
|
@implementation CSSCombinatorSelector
|
|
@synthesize selector = _selector;
|
|
|
|
+ (instancetype)childOfElementCombinator:(CSSSelector *)selector
|
|
{
|
|
return [[CSSChildOfElementCombinatorSelector alloc] initWithSelector:selector];
|
|
}
|
|
|
|
+ (instancetype)descendantOfElementCombinator:(CSSSelector *)selector
|
|
{
|
|
return [[CSSDecendantOfElementCombinatorSelector alloc] initWithSelector:selector];
|
|
}
|
|
|
|
+ (instancetype)adjacentSiblingCombinator:(CSSSelector *)selector
|
|
{
|
|
return [[CSSAdjacentSiblingCombinatorSelector alloc] initWithSelector:selector];
|
|
}
|
|
|
|
+ (instancetype)generalSiblingCombinator:(CSSSelector *)selector
|
|
{
|
|
return [[CSSGeneralSiblingCombinatorSelector alloc] initWithSelector:selector];
|
|
}
|
|
|
|
- (instancetype)initWithSelector:(CSSSelector *)selector
|
|
{
|
|
self = [super init];
|
|
if (self) {
|
|
_selector = selector;
|
|
}
|
|
return self;
|
|
}
|
|
|
|
@end
|
|
|
|
#pragma mark - Child OfElement Combinator
|
|
|
|
@implementation CSSChildOfElementCombinatorSelector
|
|
|
|
- (BOOL)acceptElement:(HTMLElement *)element
|
|
{
|
|
HTMLElement *parent = element.parentElement;
|
|
return parent != nil && [self.selector acceptElement:parent];
|
|
}
|
|
|
|
- (NSString *)debugDescription
|
|
{
|
|
return [NSString stringWithFormat:@"%@ > ", self.selector.debugDescription];
|
|
}
|
|
|
|
@end
|
|
|
|
#pragma mark - Decendant Of Element Combinator
|
|
|
|
@implementation CSSDecendantOfElementCombinatorSelector
|
|
|
|
- (BOOL)acceptElement:(HTMLElement *)element
|
|
{
|
|
HTMLElement *parent = element.parentElement;
|
|
|
|
while (parent != nil) {
|
|
if ([self.selector acceptElement:parent]) {
|
|
return YES;
|
|
}
|
|
parent = parent.parentElement;
|
|
}
|
|
|
|
return NO;
|
|
}
|
|
|
|
- (NSString *)debugDescription
|
|
{
|
|
return [NSString stringWithFormat:@"%@ ", self.selector.debugDescription];
|
|
}
|
|
|
|
@end
|
|
|
|
#pragma mark - Adjacent Sibling Combinator
|
|
|
|
@implementation CSSAdjacentSiblingCombinatorSelector
|
|
|
|
- (BOOL)acceptElement:(HTMLElement *)element
|
|
{
|
|
HTMLNode *previous = element.previousSiblingElement;
|
|
if (previous == nil || previous.nodeType != HTMLNodeElement) {
|
|
return NO;
|
|
}
|
|
return [self.selector acceptElement:previous.asElement];
|
|
}
|
|
|
|
- (NSString *)debugDescription
|
|
{
|
|
return [NSString stringWithFormat:@"%@ + ", self.selector.debugDescription];
|
|
}
|
|
|
|
@end
|
|
|
|
#pragma mark - General Sibling Combinator
|
|
|
|
@implementation CSSGeneralSiblingCombinatorSelector
|
|
|
|
- (BOOL)acceptElement:(HTMLElement *)element
|
|
{
|
|
HTMLNode *previous = element.previousSiblingElement;
|
|
|
|
while (previous != nil && previous.nodeType == HTMLNodeElement) {
|
|
if ([self.selector acceptElement:previous.asElement]) {
|
|
return YES;
|
|
}
|
|
previous = previous.previousSiblingElement;
|
|
}
|
|
|
|
return NO;
|
|
}
|
|
|
|
- (NSString *)debugDescription
|
|
{
|
|
return [NSString stringWithFormat:@"%@ ~ ", self.selector.debugDescription];
|
|
}
|
|
|
|
@end
|