4d9740ecef
These will be useful for implementing various things. They don't do any caching at the moment, but that might become valuable in the future. To facilitate this change, I also made it possible to abort a tree walk with for_each_in_subtree() by returning IterationDecision::Break from the callback.
91 lines
2.3 KiB
C++
91 lines
2.3 KiB
C++
#include <AK/StringBuilder.h>
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#include <LibHTML/CSS/StyleResolver.h>
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#include <LibHTML/DOM/Element.h>
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#include <LibHTML/DOM/HTMLAnchorElement.h>
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#include <LibHTML/DOM/Node.h>
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#include <LibHTML/Layout/LayoutBlock.h>
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#include <LibHTML/Layout/LayoutDocument.h>
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#include <LibHTML/Layout/LayoutInline.h>
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#include <LibHTML/Layout/LayoutNode.h>
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#include <LibHTML/Layout/LayoutText.h>
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Node::Node(Document& document, NodeType type)
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: m_document(document)
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, m_type(type)
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{
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}
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Node::~Node()
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{
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}
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const HTMLAnchorElement* Node::enclosing_link_element() const
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{
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for (auto* node = this; node; node = node->parent()) {
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if (is<HTMLAnchorElement>(*node) && to<HTMLAnchorElement>(*node).has_attribute("href"))
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return to<HTMLAnchorElement>(node);
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}
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return nullptr;
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}
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const HTMLElement* Node::enclosing_html_element() const
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{
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return first_ancestor_of_type<HTMLElement>();
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}
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String Node::text_content() const
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{
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Vector<String> strings;
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StringBuilder builder;
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for (auto* child = first_child(); child; child = child->next_sibling()) {
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auto text = child->text_content();
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if (!text.is_empty()) {
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builder.append(child->text_content());
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builder.append(' ');
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}
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}
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if (builder.length() > 1)
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builder.trim(1);
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return builder.to_string();
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}
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const Element* Node::next_element_sibling() const
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{
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for (auto* node = next_sibling(); node; node = node->next_sibling()) {
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if (node->is_element())
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return static_cast<const Element*>(node);
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}
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return nullptr;
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}
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const Element* Node::previous_element_sibling() const
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{
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for (auto* node = previous_sibling(); node; node = node->previous_sibling()) {
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if (node->is_element())
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return static_cast<const Element*>(node);
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}
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return nullptr;
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}
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RefPtr<LayoutNode> Node::create_layout_node(const StyleProperties*) const
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{
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return nullptr;
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}
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void Node::invalidate_style()
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{
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for_each_in_subtree([&](auto& node) {
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if (is<Element>(node))
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node.set_needs_style_update(true);
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return IterationDecision::Continue;
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});
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document().schedule_style_update();
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}
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bool Node::is_link() const
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{
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auto* enclosing_link = enclosing_link_element();
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if (!enclosing_link)
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return false;
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return enclosing_link->has_attribute("href");
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}
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