0af2795662
Instead of just ripping out the root of the layout tree from its RefPtr in Document, actually go through the DOM and gather up all the layout nodes. Then destroy them all in one swoop. Also, make sure to do this when detaching Document from Frame, to enforce the invariant that layout only occurs in framed documents.
560 lines
15 KiB
C++
560 lines
15 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <AK/StringBuilder.h>
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#include <LibCore/Timer.h>
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#include <LibGUI/Application.h>
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#include <LibGUI/DisplayLink.h>
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#include <LibGUI/MessageBox.h>
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#include <LibJS/Interpreter.h>
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#include <LibJS/Parser.h>
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#include <LibJS/Runtime/Function.h>
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#include <LibWeb/Bindings/DocumentWrapper.h>
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#include <LibWeb/Bindings/WindowObject.h>
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#include <LibWeb/CSS/StyleResolver.h>
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#include <LibWeb/DOM/Comment.h>
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#include <LibWeb/DOM/Document.h>
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#include <LibWeb/DOM/DocumentFragment.h>
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#include <LibWeb/DOM/DocumentType.h>
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#include <LibWeb/DOM/Element.h>
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#include <LibWeb/DOM/ElementFactory.h>
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#include <LibWeb/DOM/Event.h>
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#include <LibWeb/DOM/Text.h>
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#include <LibWeb/DOM/Window.h>
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#include <LibWeb/HTML/AttributeNames.h>
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#include <LibWeb/HTML/HTMLBodyElement.h>
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#include <LibWeb/HTML/HTMLFrameSetElement.h>
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#include <LibWeb/HTML/HTMLHeadElement.h>
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#include <LibWeb/HTML/HTMLHtmlElement.h>
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#include <LibWeb/HTML/HTMLScriptElement.h>
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#include <LibWeb/HTML/HTMLTitleElement.h>
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#include <LibWeb/InProcessWebView.h>
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#include <LibWeb/Layout/LayoutDocument.h>
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#include <LibWeb/Layout/LayoutTreeBuilder.h>
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#include <LibWeb/Origin.h>
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#include <LibWeb/Page/Frame.h>
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#include <LibWeb/SVG/TagNames.h>
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#include <stdio.h>
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namespace Web::DOM {
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Document::Document(const URL& url)
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: ParentNode(*this, NodeType::DOCUMENT_NODE)
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, m_style_resolver(make<CSS::StyleResolver>(*this))
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, m_style_sheets(CSS::StyleSheetList::create(*this))
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, m_url(url)
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, m_window(Window::create_with_document(*this))
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{
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m_style_update_timer = Core::Timer::create_single_shot(0, [this] {
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update_style();
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});
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}
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Document::~Document()
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{
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}
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void Document::removed_last_ref()
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{
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ASSERT(!ref_count());
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if (m_referencing_node_count)
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return;
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delete this;
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}
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Origin Document::origin() const
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{
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if (!m_url.is_valid())
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return {};
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return { m_url.protocol(), m_url.host(), m_url.port() };
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}
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void Document::schedule_style_update()
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{
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if (m_style_update_timer->is_active())
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return;
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m_style_update_timer->start();
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}
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bool Document::is_child_allowed(const Node& node) const
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{
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switch (node.type()) {
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case NodeType::DOCUMENT_NODE:
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case NodeType::TEXT_NODE:
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return false;
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case NodeType::COMMENT_NODE:
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return true;
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case NodeType::DOCUMENT_TYPE_NODE:
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return !first_child_of_type<DocumentType>();
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case NodeType::ELEMENT_NODE:
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return !first_child_of_type<Element>();
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default:
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return false;
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}
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}
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const Element* Document::document_element() const
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{
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return first_child_of_type<Element>();
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}
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const HTML::HTMLHtmlElement* Document::html_element() const
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{
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auto* html = document_element();
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if (is<HTML::HTMLHtmlElement>(html))
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return downcast<HTML::HTMLHtmlElement>(html);
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return nullptr;
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}
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const HTML::HTMLHeadElement* Document::head() const
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{
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auto* html = html_element();
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if (!html)
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return nullptr;
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return html->first_child_of_type<HTML::HTMLHeadElement>();
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}
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const HTML::HTMLElement* Document::body() const
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{
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auto* html = html_element();
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if (!html)
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return nullptr;
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auto* first_body = html->first_child_of_type<HTML::HTMLBodyElement>();
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if (first_body)
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return first_body;
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auto* first_frameset = html->first_child_of_type<HTML::HTMLFrameSetElement>();
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if (first_frameset)
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return first_frameset;
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return nullptr;
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}
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void Document::set_body(HTML::HTMLElement& new_body)
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{
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if (!is<HTML::HTMLBodyElement>(new_body) && !is<HTML::HTMLFrameSetElement>(new_body)) {
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// FIXME: throw a "HierarchyRequestError" DOMException.
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return;
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}
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auto* existing_body = body();
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if (existing_body) {
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TODO();
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return;
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}
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auto* html = document_element();
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if (!html) {
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// FIXME: throw a "HierarchyRequestError" DOMException.
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return;
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}
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// FIXME: Implement this once there's a non-const first_child_of_type:
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// "Otherwise, the body element is null, but there's a document element. Append the new value to the document element."
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TODO();
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}
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String Document::title() const
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{
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auto* head_element = head();
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if (!head_element)
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return {};
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auto* title_element = head_element->first_child_of_type<HTML::HTMLTitleElement>();
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if (!title_element)
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return {};
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return title_element->text_content();
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}
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void Document::attach_to_frame(Badge<Frame>, Frame& frame)
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{
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m_frame = frame.make_weak_ptr();
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for_each_in_subtree([&](auto& node) {
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node.document_did_attach_to_frame(frame);
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return IterationDecision::Continue;
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});
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layout();
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}
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void Document::detach_from_frame(Badge<Frame>, Frame& frame)
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{
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for_each_in_subtree([&](auto& node) {
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node.document_will_detach_from_frame(frame);
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return IterationDecision::Continue;
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});
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tear_down_layout_tree();
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m_frame = nullptr;
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}
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void Document::tear_down_layout_tree()
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{
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if (!m_layout_root)
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return;
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// Gather up all the layout nodes in a vector and detach them from parents
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// while the vector keeps them alive.
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NonnullRefPtrVector<LayoutNode> layout_nodes;
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for_each_in_subtree([&](auto& node) {
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if (node.layout_node())
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layout_nodes.append(*node.layout_node());
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return IterationDecision::Continue;
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});
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for (auto& layout_node : layout_nodes) {
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if (layout_node.parent())
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layout_node.parent()->remove_child(layout_node);
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}
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m_layout_root = nullptr;
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}
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Color Document::background_color(const Palette& palette) const
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{
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auto default_color = palette.base();
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auto* body_element = body();
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if (!body_element)
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return default_color;
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auto* body_layout_node = body_element->layout_node();
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if (!body_layout_node)
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return default_color;
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auto background_color = body_layout_node->specified_style().property(CSS::PropertyID::BackgroundColor);
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if (!background_color.has_value() || !background_color.value()->is_color())
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return default_color;
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return background_color.value()->to_color(*this);
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}
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RefPtr<Gfx::Bitmap> Document::background_image() const
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{
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auto* body_element = body();
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if (!body_element)
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return {};
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auto* body_layout_node = body_element->layout_node();
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if (!body_layout_node)
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return {};
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auto background_image = body_layout_node->specified_style().property(CSS::PropertyID::BackgroundImage);
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if (!background_image.has_value() || !background_image.value()->is_image())
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return {};
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auto& image_value = static_cast<const CSS::ImageStyleValue&>(*background_image.value());
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if (!image_value.bitmap())
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return {};
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return *image_value.bitmap();
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}
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URL Document::complete_url(const String& string) const
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{
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return m_url.complete_url(string);
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}
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void Document::invalidate_layout()
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{
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tear_down_layout_tree();
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}
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void Document::force_layout()
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{
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invalidate_layout();
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layout();
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}
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void Document::layout()
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{
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if (!frame())
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return;
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if (!m_layout_root) {
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LayoutTreeBuilder tree_builder;
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m_layout_root = static_ptr_cast<LayoutDocument>(tree_builder.build(*this));
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}
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m_layout_root->layout();
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m_layout_root->set_needs_display();
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if (frame()->is_main_frame())
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frame()->page().client().page_did_layout();
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}
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void Document::update_style()
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{
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for_each_in_subtree_of_type<Element>([&](auto& element) {
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if (element.needs_style_update())
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element.recompute_style();
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return IterationDecision::Continue;
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});
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update_layout();
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}
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void Document::update_layout()
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{
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if (!frame())
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return;
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layout();
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}
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RefPtr<LayoutNode> Document::create_layout_node(const CSS::StyleProperties*)
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{
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return adopt(*new LayoutDocument(*this, CSS::StyleProperties::create()));
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}
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void Document::set_link_color(Color color)
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{
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m_link_color = color;
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}
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void Document::set_active_link_color(Color color)
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{
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m_active_link_color = color;
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}
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void Document::set_visited_link_color(Color color)
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{
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m_visited_link_color = color;
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}
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const LayoutDocument* Document::layout_node() const
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{
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return static_cast<const LayoutDocument*>(Node::layout_node());
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}
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LayoutDocument* Document::layout_node()
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{
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return static_cast<LayoutDocument*>(Node::layout_node());
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}
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void Document::set_inspected_node(Node* node)
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{
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if (m_inspected_node == node)
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return;
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if (m_inspected_node && m_inspected_node->layout_node())
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m_inspected_node->layout_node()->set_needs_display();
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m_inspected_node = node;
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if (m_inspected_node && m_inspected_node->layout_node())
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m_inspected_node->layout_node()->set_needs_display();
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}
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void Document::set_hovered_node(Node* node)
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{
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if (m_hovered_node == node)
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return;
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RefPtr<Node> old_hovered_node = move(m_hovered_node);
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m_hovered_node = node;
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invalidate_style();
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}
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NonnullRefPtrVector<Element> Document::get_elements_by_name(const String& name) const
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{
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NonnullRefPtrVector<Element> elements;
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for_each_in_subtree_of_type<Element>([&](auto& element) {
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if (element.attribute(HTML::AttributeNames::name) == name)
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elements.append(element);
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return IterationDecision::Continue;
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});
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return elements;
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}
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NonnullRefPtrVector<Element> Document::get_elements_by_tag_name(const FlyString& tag_name) const
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{
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NonnullRefPtrVector<Element> elements;
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for_each_in_subtree_of_type<Element>([&](auto& element) {
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if (element.local_name() == tag_name)
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elements.append(element);
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return IterationDecision::Continue;
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});
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return elements;
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}
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Color Document::link_color() const
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{
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if (m_link_color.has_value())
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return m_link_color.value();
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if (!frame())
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return Color::Blue;
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return frame()->page().palette().link();
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}
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Color Document::active_link_color() const
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{
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if (m_active_link_color.has_value())
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return m_active_link_color.value();
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if (!frame())
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return Color::Red;
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return frame()->page().palette().active_link();
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}
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Color Document::visited_link_color() const
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{
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if (m_visited_link_color.has_value())
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return m_visited_link_color.value();
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if (!frame())
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return Color::Magenta;
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return frame()->page().palette().visited_link();
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}
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static JS::VM& main_thread_vm()
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{
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static RefPtr<JS::VM> vm;
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if (!vm)
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vm = JS::VM::create();
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return *vm;
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}
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JS::Interpreter& Document::interpreter()
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{
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if (!m_interpreter)
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m_interpreter = JS::Interpreter::create<Bindings::WindowObject>(main_thread_vm(), *m_window);
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return *m_interpreter;
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}
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JS::Value Document::run_javascript(const StringView& source)
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{
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auto parser = JS::Parser(JS::Lexer(source));
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auto program = parser.parse_program();
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if (parser.has_errors()) {
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parser.print_errors();
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return JS::js_undefined();
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}
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auto& interpreter = document().interpreter();
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auto result = interpreter.run(interpreter.global_object(), *program);
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if (interpreter.exception())
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interpreter.vm().clear_exception();
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return result;
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}
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NonnullRefPtr<Element> Document::create_element(const String& tag_name)
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{
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return DOM::create_element(*this, tag_name);
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}
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NonnullRefPtr<DocumentFragment> Document::create_document_fragment()
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{
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return adopt(*new DocumentFragment(*this));
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}
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NonnullRefPtr<Text> Document::create_text_node(const String& data)
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{
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return adopt(*new Text(*this, data));
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}
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NonnullRefPtr<Comment> Document::create_comment(const String& data)
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{
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return adopt(*new Comment(*this, data));
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}
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void Document::set_pending_parsing_blocking_script(Badge<HTML::HTMLScriptElement>, HTML::HTMLScriptElement* script)
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{
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m_pending_parsing_blocking_script = script;
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}
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NonnullRefPtr<HTML::HTMLScriptElement> Document::take_pending_parsing_blocking_script(Badge<HTML::HTMLDocumentParser>)
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{
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return m_pending_parsing_blocking_script.release_nonnull();
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}
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void Document::add_script_to_execute_when_parsing_has_finished(Badge<HTML::HTMLScriptElement>, HTML::HTMLScriptElement& script)
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{
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m_scripts_to_execute_when_parsing_has_finished.append(script);
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}
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NonnullRefPtrVector<HTML::HTMLScriptElement> Document::take_scripts_to_execute_when_parsing_has_finished(Badge<HTML::HTMLDocumentParser>)
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{
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return move(m_scripts_to_execute_when_parsing_has_finished);
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}
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void Document::add_script_to_execute_as_soon_as_possible(Badge<HTML::HTMLScriptElement>, HTML::HTMLScriptElement& script)
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{
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m_scripts_to_execute_as_soon_as_possible.append(script);
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}
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NonnullRefPtrVector<HTML::HTMLScriptElement> Document::take_scripts_to_execute_as_soon_as_possible(Badge<HTML::HTMLDocumentParser>)
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{
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return move(m_scripts_to_execute_as_soon_as_possible);
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}
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void Document::adopt_node(Node& subtree_root)
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{
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subtree_root.for_each_in_subtree([&](auto& node) {
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node.set_document({}, *this);
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return IterationDecision::Continue;
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});
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}
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const DocumentType* Document::doctype() const
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{
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return first_child_of_type<DocumentType>();
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}
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const String& Document::compat_mode() const
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{
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static String back_compat = "BackCompat";
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static String css1_compat = "CSS1Compat";
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if (m_quirks_mode == QuirksMode::Yes)
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return back_compat;
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return css1_compat;
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}
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bool Document::is_editable() const
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{
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return m_editable;
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}
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void Document::set_focused_element(Element* element)
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{
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if (m_focused_element == element)
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return;
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if (element)
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|
m_focused_element = element->make_weak_ptr();
|
|
else
|
|
m_focused_element = nullptr;
|
|
|
|
if (m_layout_root)
|
|
m_layout_root->set_needs_display();
|
|
}
|
|
|
|
void Document::set_ready_state(const String& ready_state)
|
|
{
|
|
m_ready_state = ready_state;
|
|
dispatch_event(Event::create("readystatechange"));
|
|
}
|
|
|
|
}
|