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156c1083e9
The first step of the find in page algorithm is to walk the layout tree of each document on the page and construct a list of strings against which to search for matches. Previously, this was being done for each new query, even when the page content hadn't been updated. The output of this process is now cached in the viewport node of the associated document. This ensures that this process is no longer repeated unnceessarily.
93 lines
2.7 KiB
C++
93 lines
2.7 KiB
C++
/*
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* Copyright (c) 2018-2023, 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 <LibWeb/DOM/Range.h>
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#include <LibWeb/Dump.h>
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#include <LibWeb/Layout/Viewport.h>
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#include <LibWeb/Painting/PaintableBox.h>
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#include <LibWeb/Painting/StackingContext.h>
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#include <LibWeb/Painting/ViewportPaintable.h>
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namespace Web::Layout {
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JS_DEFINE_ALLOCATOR(Viewport);
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Viewport::Viewport(DOM::Document& document, NonnullRefPtr<CSS::StyleProperties> style)
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: BlockContainer(document, &document, move(style))
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{
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}
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Viewport::~Viewport() = default;
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JS::GCPtr<Painting::Paintable> Viewport::create_paintable() const
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{
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return Painting::ViewportPaintable::create(*this);
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}
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void Viewport::visit_edges(Visitor& visitor)
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{
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Base::visit_edges(visitor);
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if (!m_text_blocks.has_value())
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return;
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for (auto& text_block : *m_text_blocks) {
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for (auto& text_position : text_block.positions)
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visitor.visit(text_position.dom_node);
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}
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}
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Vector<Viewport::TextBlock> const& Viewport::text_blocks()
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{
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if (!m_text_blocks.has_value())
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update_text_blocks();
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return *m_text_blocks;
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}
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void Viewport::update_text_blocks()
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{
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StringBuilder builder;
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size_t current_start_position = 0;
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Vector<TextPosition> text_positions;
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Vector<TextBlock> text_blocks;
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for_each_in_inclusive_subtree([&](auto const& layout_node) {
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if (layout_node.display().is_none() || !layout_node.paintable() || !layout_node.paintable()->is_visible())
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return TraversalDecision::Continue;
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if (layout_node.is_box()) {
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if (!builder.is_empty()) {
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text_blocks.append({ builder.to_string_without_validation(), text_positions });
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current_start_position = 0;
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text_positions.clear_with_capacity();
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builder.clear();
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}
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return TraversalDecision::Continue;
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}
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if (layout_node.is_text_node()) {
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auto const& text_node = verify_cast<Layout::TextNode>(layout_node);
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auto& dom_node = const_cast<DOM::Text&>(text_node.dom_node());
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if (text_positions.is_empty()) {
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text_positions.empend(dom_node);
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} else {
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text_positions.empend(dom_node, current_start_position);
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}
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auto const& current_node_text = text_node.text_for_rendering();
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current_start_position += current_node_text.bytes_as_string_view().length();
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builder.append(move(current_node_text));
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}
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return TraversalDecision::Continue;
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});
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if (!builder.is_empty())
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text_blocks.append({ builder.to_string_without_validation(), text_positions });
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m_text_blocks = move(text_blocks);
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}
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}
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