iska
77 lines
1.3 KiB
Objective-C
77 lines
1.3 KiB
Objective-C
//
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// HTMLNodeTraversal.m
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// HTMLKit
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//
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// Created by Iska on 05/06/15.
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// Copyright (c) 2015 BrainCookie. All rights reserved.
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//
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#import "HTMLNodeTraversal.h"
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#import "HTMLNode.h"
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#import "HTMLNodeFilter.h"
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HTMLNode * PrecedingNode(HTMLNode *node, HTMLNode *root)
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{
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HTMLNode *previous = node.previousSibling;
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if (previous != nil) {
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while (previous.lastChild != nil) {
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previous = previous.lastChild;
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}
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return previous;
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}
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if (node == root) {
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return nil;
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}
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return node.parentNode;
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}
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HTMLNode * FollowingNode(HTMLNode *node, HTMLNode *root)
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{
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if (node.firstChild != nil) {
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return node.firstChild;
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}
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do {
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if (node == root) {
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return nil;
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}
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if (node.nextSibling != nil) {
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return node.nextSibling;
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}
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node = node.parentNode;
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} while (node != nil);
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return nil;
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}
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HTMLNode * FollowingNodeSkippingChildren(HTMLNode *node, HTMLNode *root)
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{
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do {
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if (node == root) {
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return nil;
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}
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if (node.nextSibling != nil) {
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return node.nextSibling;
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}
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node = node.parentNode;
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} while (node != nil);
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return nil;
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}
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HTMLNodeFilterValue FilterNode(id<HTMLNodeFilter> filter, HTMLNodeFilterShowOptions whatToShow, HTMLNode *node)
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{
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unsigned long nthBit = (1 << (node.nodeType - 1)) & whatToShow;
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if (!nthBit) {
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return HTMLNodeFilterSkip;
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}
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if (filter == nil) {
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return HTMLNodeFilterAccept;
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}
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return [filter acceptNode:node];
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}
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