jcs.org
Serenity Operating System
1/*
2 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice, this
9 * list of conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright notice,
12 * this list of conditions and the following disclaimer in the documentation
13 * and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
22 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include <AK/StringBuilder.h>
28#include <LibHTML/CSS/StyleResolver.h>
29#include <LibHTML/DOM/Element.h>
30#include <LibHTML/DOM/HTMLAnchorElement.h>
31#include <LibHTML/DOM/Node.h>
32#include <LibHTML/Layout/LayoutBlock.h>
33#include <LibHTML/Layout/LayoutDocument.h>
34#include <LibHTML/Layout/LayoutInline.h>
35#include <LibHTML/Layout/LayoutNode.h>
36#include <LibHTML/Layout/LayoutText.h>
37
38Node::Node(Document& document, NodeType type)
39 : m_document(document)
40 , m_type(type)
41{
42}
43
44Node::~Node()
45{
46}
47
48const HTMLAnchorElement* Node::enclosing_link_element() const
49{
50 for (auto* node = this; node; node = node->parent()) {
51 if (is<HTMLAnchorElement>(*node) && to<HTMLAnchorElement>(*node).has_attribute("href"))
52 return to<HTMLAnchorElement>(node);
53 }
54 return nullptr;
55}
56
57const HTMLElement* Node::enclosing_html_element() const
58{
59 return first_ancestor_of_type<HTMLElement>();
60}
61
62String Node::text_content() const
63{
64 Vector<String> strings;
65 StringBuilder builder;
66 for (auto* child = first_child(); child; child = child->next_sibling()) {
67 auto text = child->text_content();
68 if (!text.is_empty()) {
69 builder.append(child->text_content());
70 builder.append(' ');
71 }
72 }
73 if (builder.length() > 1)
74 builder.trim(1);
75 return builder.to_string();
76}
77
78const Element* Node::next_element_sibling() const
79{
80 for (auto* node = next_sibling(); node; node = node->next_sibling()) {
81 if (node->is_element())
82 return static_cast<const Element*>(node);
83 }
84 return nullptr;
85}
86
87const Element* Node::previous_element_sibling() const
88{
89 for (auto* node = previous_sibling(); node; node = node->previous_sibling()) {
90 if (node->is_element())
91 return static_cast<const Element*>(node);
92 }
93 return nullptr;
94}
95
96RefPtr<LayoutNode> Node::create_layout_node(const StyleProperties*) const
97{
98 return nullptr;
99}
100
101void Node::invalidate_style()
102{
103 for_each_in_subtree_of_type<Element>([&](auto& element) {
104 element.set_needs_style_update(true);
105 return IterationDecision::Continue;
106 });
107 document().schedule_style_update();
108}
109
110bool Node::is_link() const
111{
112 auto* enclosing_link = enclosing_link_element();
113 if (!enclosing_link)
114 return false;
115 return enclosing_link->has_attribute("href");
116}