mirror of
https://github.com/RGBCube/serenity
synced 2025-10-31 15:12:45 +00:00
72c9f56c66
Stop worrying about tiny OOMs. Work towards #20449. While going through these, I also changed the function signature in many places where returning ThrowCompletionOr<T> is no longer necessary.
460 lines
18 KiB
C++
460 lines
18 KiB
C++
/*
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* Copyright (c) 2018-2022, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/StringBuilder.h>
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#include <LibWeb/ARIA/Roles.h>
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#include <LibWeb/Bindings/ExceptionOrUtils.h>
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#include <LibWeb/DOM/Document.h>
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#include <LibWeb/DOM/IDLEventListener.h>
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#include <LibWeb/DOM/ShadowRoot.h>
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#include <LibWeb/HTML/BrowsingContext.h>
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#include <LibWeb/HTML/DOMStringMap.h>
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#include <LibWeb/HTML/EventHandler.h>
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#include <LibWeb/HTML/Focus.h>
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#include <LibWeb/HTML/HTMLAnchorElement.h>
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#include <LibWeb/HTML/HTMLAreaElement.h>
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#include <LibWeb/HTML/HTMLBaseElement.h>
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#include <LibWeb/HTML/HTMLBodyElement.h>
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#include <LibWeb/HTML/HTMLElement.h>
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#include <LibWeb/HTML/NavigableContainer.h>
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#include <LibWeb/HTML/VisibilityState.h>
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#include <LibWeb/HTML/Window.h>
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#include <LibWeb/Infra/CharacterTypes.h>
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#include <LibWeb/Infra/Strings.h>
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#include <LibWeb/Layout/Box.h>
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#include <LibWeb/Layout/BreakNode.h>
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#include <LibWeb/Layout/TextNode.h>
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#include <LibWeb/Painting/PaintableBox.h>
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#include <LibWeb/UIEvents/EventNames.h>
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#include <LibWeb/UIEvents/FocusEvent.h>
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#include <LibWeb/UIEvents/MouseEvent.h>
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#include <LibWeb/WebIDL/DOMException.h>
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#include <LibWeb/WebIDL/ExceptionOr.h>
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namespace Web::HTML {
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HTMLElement::HTMLElement(DOM::Document& document, DOM::QualifiedName qualified_name)
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: Element(document, move(qualified_name))
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{
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}
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HTMLElement::~HTMLElement() = default;
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void HTMLElement::initialize(JS::Realm& realm)
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{
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Base::initialize(realm);
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set_prototype(&Bindings::ensure_web_prototype<Bindings::HTMLElementPrototype>(realm, "HTMLElement"));
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m_dataset = DOMStringMap::create(*this);
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}
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void HTMLElement::visit_edges(Cell::Visitor& visitor)
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{
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Base::visit_edges(visitor);
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visitor.visit(m_dataset.ptr());
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}
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// https://html.spec.whatwg.org/multipage/dom.html#dom-dir
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DeprecatedString HTMLElement::dir() const
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{
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auto dir = attribute(HTML::AttributeNames::dir);
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#define __ENUMERATE_HTML_ELEMENT_DIR_ATTRIBUTE(keyword) \
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if (dir.equals_ignoring_ascii_case(#keyword##sv)) \
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return #keyword##sv;
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ENUMERATE_HTML_ELEMENT_DIR_ATTRIBUTES
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#undef __ENUMERATE_HTML_ELEMENT_DIR_ATTRIBUTE
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return {};
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}
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void HTMLElement::set_dir(DeprecatedString const& dir)
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{
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MUST(set_attribute(HTML::AttributeNames::dir, dir));
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}
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bool HTMLElement::is_editable() const
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{
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switch (m_content_editable_state) {
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case ContentEditableState::True:
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return true;
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case ContentEditableState::False:
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return false;
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case ContentEditableState::Inherit:
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return parent() && parent()->is_editable();
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default:
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VERIFY_NOT_REACHED();
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}
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}
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DeprecatedString HTMLElement::content_editable() const
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{
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switch (m_content_editable_state) {
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case ContentEditableState::True:
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return "true";
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case ContentEditableState::False:
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return "false";
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case ContentEditableState::Inherit:
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return "inherit";
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default:
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VERIFY_NOT_REACHED();
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}
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}
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// https://html.spec.whatwg.org/multipage/interaction.html#contenteditable
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WebIDL::ExceptionOr<void> HTMLElement::set_content_editable(DeprecatedString const& content_editable)
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{
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if (content_editable.equals_ignoring_ascii_case("inherit"sv)) {
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remove_attribute(HTML::AttributeNames::contenteditable);
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return {};
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}
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if (content_editable.equals_ignoring_ascii_case("true"sv)) {
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MUST(set_attribute(HTML::AttributeNames::contenteditable, "true"));
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return {};
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}
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if (content_editable.equals_ignoring_ascii_case("false"sv)) {
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MUST(set_attribute(HTML::AttributeNames::contenteditable, "false"));
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return {};
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}
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return WebIDL::SyntaxError::create(realm(), "Invalid contentEditable value, must be 'true', 'false', or 'inherit'");
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}
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void HTMLElement::set_inner_text(StringView text)
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{
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remove_all_children();
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MUST(append_child(document().create_text_node(text)));
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set_needs_style_update(true);
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}
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DeprecatedString HTMLElement::inner_text()
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{
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StringBuilder builder;
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// innerText for element being rendered takes visibility into account, so force a layout and then walk the layout tree.
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document().update_layout();
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if (!layout_node())
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return text_content();
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Function<void(Layout::Node const&)> recurse = [&](auto& node) {
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for (auto* child = node.first_child(); child; child = child->next_sibling()) {
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if (is<Layout::TextNode>(child))
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builder.append(verify_cast<Layout::TextNode>(*child).text_for_rendering());
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if (is<Layout::BreakNode>(child))
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builder.append('\n');
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recurse(*child);
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}
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};
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recurse(*layout_node());
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return builder.to_deprecated_string();
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}
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// // https://drafts.csswg.org/cssom-view/#dom-htmlelement-offsettop
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int HTMLElement::offset_top() const
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{
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// NOTE: Ensure that layout is up-to-date before looking at metrics.
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const_cast<DOM::Document&>(document()).update_layout();
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if (is<HTML::HTMLBodyElement>(this) || !layout_node() || !parent_element() || !parent_element()->layout_node())
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return 0;
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auto position = layout_node()->box_type_agnostic_position();
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auto parent_position = parent_element()->layout_node()->box_type_agnostic_position();
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return position.y().to_int() - parent_position.y().to_int();
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}
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// https://drafts.csswg.org/cssom-view/#dom-htmlelement-offsetleft
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int HTMLElement::offset_left() const
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{
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// NOTE: Ensure that layout is up-to-date before looking at metrics.
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const_cast<DOM::Document&>(document()).update_layout();
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if (is<HTML::HTMLBodyElement>(this) || !layout_node() || !parent_element() || !parent_element()->layout_node())
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return 0;
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auto position = layout_node()->box_type_agnostic_position();
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auto parent_position = parent_element()->layout_node()->box_type_agnostic_position();
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return position.x().to_int() - parent_position.x().to_int();
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}
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// https://drafts.csswg.org/cssom-view/#dom-htmlelement-offsetwidth
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int HTMLElement::offset_width() const
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{
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// NOTE: Ensure that layout is up-to-date before looking at metrics.
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const_cast<DOM::Document&>(document()).update_layout();
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// 1. If the element does not have any associated CSS layout box return zero and terminate this algorithm.
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if (!paintable_box())
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return 0;
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// 2. Return the width of the axis-aligned bounding box of the border boxes of all fragments generated by the element’s principal box,
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// ignoring any transforms that apply to the element and its ancestors.
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// FIXME: Account for inline boxes.
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return paintable_box()->border_box_width().to_int();
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}
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// https://drafts.csswg.org/cssom-view/#dom-htmlelement-offsetheight
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int HTMLElement::offset_height() const
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{
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// NOTE: Ensure that layout is up-to-date before looking at metrics.
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const_cast<DOM::Document&>(document()).update_layout();
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// 1. If the element does not have any associated CSS layout box return zero and terminate this algorithm.
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if (!paintable_box())
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return 0;
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// 2. Return the height of the axis-aligned bounding box of the border boxes of all fragments generated by the element’s principal box,
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// ignoring any transforms that apply to the element and its ancestors.
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// FIXME: Account for inline boxes.
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return paintable_box()->border_box_height().to_int();
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}
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// https://html.spec.whatwg.org/multipage/links.html#cannot-navigate
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bool HTMLElement::cannot_navigate() const
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{
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// An element element cannot navigate if one of the following is true:
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// - element's node document is not fully active
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if (!document().is_fully_active())
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return true;
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// - element is not an a element and is not connected.
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return !is<HTML::HTMLAnchorElement>(this) && !is_connected();
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}
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void HTMLElement::attribute_changed(DeprecatedFlyString const& name, DeprecatedString const& value)
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{
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Element::attribute_changed(name, value);
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if (name == HTML::AttributeNames::contenteditable) {
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if (value.is_null()) {
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m_content_editable_state = ContentEditableState::Inherit;
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} else {
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if (value.is_empty() || value.equals_ignoring_ascii_case("true"sv)) {
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// "true", an empty string or a missing value map to the "true" state.
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m_content_editable_state = ContentEditableState::True;
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} else if (value.equals_ignoring_ascii_case("false"sv)) {
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// "false" maps to the "false" state.
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m_content_editable_state = ContentEditableState::False;
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} else {
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// Having no such attribute or an invalid value maps to the "inherit" state.
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m_content_editable_state = ContentEditableState::Inherit;
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}
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}
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}
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// 1. If namespace is not null, or localName is not the name of an event handler content attribute on element, then return.
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// FIXME: Add the namespace part once we support attribute namespaces.
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#undef __ENUMERATE
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#define __ENUMERATE(attribute_name, event_name) \
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if (name == HTML::AttributeNames::attribute_name) { \
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element_event_handler_attribute_changed(event_name, String::from_deprecated_string(value).release_value()); \
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}
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ENUMERATE_GLOBAL_EVENT_HANDLERS(__ENUMERATE)
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#undef __ENUMERATE
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}
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// https://html.spec.whatwg.org/multipage/interaction.html#dom-focus
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void HTMLElement::focus()
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{
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// 1. If the element is marked as locked for focus, then return.
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if (m_locked_for_focus)
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return;
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// 2. Mark the element as locked for focus.
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m_locked_for_focus = true;
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// 3. Run the focusing steps for the element.
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run_focusing_steps(this);
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// FIXME: 4. If the value of the preventScroll dictionary member of options is false,
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// then scroll the element into view with scroll behavior "auto",
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// block flow direction position set to an implementation-defined value,
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// and inline base direction position set to an implementation-defined value.
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// 5. Unmark the element as locked for focus.
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m_locked_for_focus = false;
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}
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// https://html.spec.whatwg.org/multipage/webappapis.html#fire-a-synthetic-pointer-event
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bool HTMLElement::fire_a_synthetic_pointer_event(FlyString const& type, DOM::Element& target, bool not_trusted)
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{
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// 1. Let event be the result of creating an event using PointerEvent.
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// 2. Initialize event's type attribute to e.
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// FIXME: Actually create a PointerEvent!
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auto event = UIEvents::MouseEvent::create(realm(), type);
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// 3. Initialize event's bubbles and cancelable attributes to true.
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event->set_bubbles(true);
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event->set_cancelable(true);
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// 4. Set event's composed flag.
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event->set_composed(true);
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// 5. If the not trusted flag is set, initialize event's isTrusted attribute to false.
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if (not_trusted) {
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event->set_is_trusted(false);
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}
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// FIXME: 6. Initialize event's ctrlKey, shiftKey, altKey, and metaKey attributes according to the current state
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// of the key input device, if any (false for any keys that are not available).
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// FIXME: 7. Initialize event's view attribute to target's node document's Window object, if any, and null otherwise.
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// FIXME: 8. event's getModifierState() method is to return values appropriately describing the current state of the key input device.
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// 9. Return the result of dispatching event at target.
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return target.dispatch_event(event);
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}
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// https://html.spec.whatwg.org/multipage/interaction.html#dom-click
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void HTMLElement::click()
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{
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// FIXME: 1. If this element is a form control that is disabled, then return.
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// 2. If this element's click in progress flag is set, then return.
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if (m_click_in_progress)
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return;
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// 3. Set this element's click in progress flag.
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m_click_in_progress = true;
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// FIXME: 4. Fire a synthetic pointer event named click at this element, with the not trusted flag set.
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fire_a_synthetic_pointer_event(HTML::EventNames::click, *this, true);
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// 5. Unset this element's click in progress flag.
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m_click_in_progress = false;
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}
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// https://html.spec.whatwg.org/multipage/interaction.html#dom-blur
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void HTMLElement::blur()
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{
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// The blur() method, when invoked, should run the unfocusing steps for the element on which the method was called.
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run_unfocusing_steps(this);
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// User agents may selectively or uniformly ignore calls to this method for usability reasons.
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}
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Optional<ARIA::Role> HTMLElement::default_role() const
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{
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// https://www.w3.org/TR/html-aria/#el-article
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if (local_name() == TagNames::article)
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return ARIA::Role::article;
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// https://www.w3.org/TR/html-aria/#el-aside
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if (local_name() == TagNames::aside)
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return ARIA::Role::complementary;
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// https://www.w3.org/TR/html-aria/#el-b
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if (local_name() == TagNames::b)
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return ARIA::Role::generic;
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// https://www.w3.org/TR/html-aria/#el-bdi
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if (local_name() == TagNames::bdi)
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return ARIA::Role::generic;
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// https://www.w3.org/TR/html-aria/#el-bdo
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if (local_name() == TagNames::bdo)
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return ARIA::Role::generic;
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// https://www.w3.org/TR/html-aria/#el-code
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if (local_name() == TagNames::code)
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return ARIA::Role::code;
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// https://www.w3.org/TR/html-aria/#el-dfn
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if (local_name() == TagNames::dfn)
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return ARIA::Role::term;
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// https://www.w3.org/TR/html-aria/#el-em
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if (local_name() == TagNames::em)
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return ARIA::Role::emphasis;
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// https://www.w3.org/TR/html-aria/#el-figure
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if (local_name() == TagNames::figure)
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return ARIA::Role::figure;
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// https://www.w3.org/TR/html-aria/#el-footer
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if (local_name() == TagNames::footer) {
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// TODO: If not a descendant of an article, aside, main, nav or section element, or an element with role=article, complementary, main, navigation or region then role=contentinfo
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// Otherwise, role=generic
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return ARIA::Role::generic;
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}
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// https://www.w3.org/TR/html-aria/#el-header
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if (local_name() == TagNames::header) {
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// TODO: If not a descendant of an article, aside, main, nav or section element, or an element with role=article, complementary, main, navigation or region then role=banner
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// Otherwise, role=generic
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return ARIA::Role::generic;
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}
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// https://www.w3.org/TR/html-aria/#el-hgroup
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if (local_name() == TagNames::hgroup)
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return ARIA::Role::generic;
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// https://www.w3.org/TR/html-aria/#el-i
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if (local_name() == TagNames::i)
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return ARIA::Role::generic;
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// https://www.w3.org/TR/html-aria/#el-main
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if (local_name() == TagNames::main)
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return ARIA::Role::main;
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// https://www.w3.org/TR/html-aria/#el-nav
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if (local_name() == TagNames::nav)
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return ARIA::Role::navigation;
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// https://www.w3.org/TR/html-aria/#el-samp
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if (local_name() == TagNames::samp)
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return ARIA::Role::generic;
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// https://www.w3.org/TR/html-aria/#el-section
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if (local_name() == TagNames::section) {
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// TODO: role=region if the section element has an accessible name
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// Otherwise, no corresponding role
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return ARIA::Role::region;
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}
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// https://www.w3.org/TR/html-aria/#el-small
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if (local_name() == TagNames::small)
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return ARIA::Role::generic;
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// https://www.w3.org/TR/html-aria/#el-strong
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if (local_name() == TagNames::strong)
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return ARIA::Role::strong;
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// https://www.w3.org/TR/html-aria/#el-sub
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if (local_name() == TagNames::sub)
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return ARIA::Role::subscript;
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// https://www.w3.org/TR/html-aria/#el-summary
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if (local_name() == TagNames::summary)
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return ARIA::Role::button;
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// https://www.w3.org/TR/html-aria/#el-sup
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if (local_name() == TagNames::sup)
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return ARIA::Role::superscript;
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// https://www.w3.org/TR/html-aria/#el-u
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if (local_name() == TagNames::u)
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return ARIA::Role::generic;
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return {};
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}
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// https://html.spec.whatwg.org/multipage/semantics.html#get-an-element's-target
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DeprecatedString HTMLElement::get_an_elements_target() const
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{
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// To get an element's target, given an a, area, or form element element, run these steps:
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// 1. If element has a target attribute, then return that attribute's value.
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if (has_attribute(AttributeNames::target))
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return attribute(AttributeNames::target);
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// FIXME: 2. If element's node document contains a base element with a
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// target attribute, then return the value of the target attribute of the
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// first such base element.
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// 3. Return the empty string.
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return DeprecatedString::empty();
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}
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// https://html.spec.whatwg.org/multipage/links.html#get-an-element's-noopener
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TokenizedFeature::NoOpener HTMLElement::get_an_elements_noopener(StringView target) const
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{
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// To get an element's noopener, given an a, area, or form element element and a string target:
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auto rel = attribute(HTML::AttributeNames::rel).to_lowercase();
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auto link_types = rel.view().split_view_if(Infra::is_ascii_whitespace);
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// 1. If element's link types include the noopener or noreferrer keyword, then return true.
|
||
if (link_types.contains_slow("noopener"sv) || link_types.contains_slow("noreferrer"sv))
|
||
return TokenizedFeature::NoOpener::Yes;
|
||
|
||
// 2. If element's link types do not include the opener keyword and
|
||
// target is an ASCII case-insensitive match for "_blank", then return true.
|
||
if (!link_types.contains_slow("opener"sv) && Infra::is_ascii_case_insensitive_match(target, "_blank"sv))
|
||
return TokenizedFeature::NoOpener::Yes;
|
||
|
||
// 3. Return false.
|
||
return TokenizedFeature::NoOpener::No;
|
||
}
|
||
|
||
}
|