3d7e788981
Check the width of the next token after white space to decide line breaks. The next width can also be the total width of multiple tokens. This better follows the CSS Text specification and matches behavior of other browsers. Fixes #20388.
104 lines
3.3 KiB
C++
104 lines
3.3 KiB
C++
/*
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* Copyright (c) 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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#pragma once
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#include <AK/Noncopyable.h>
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#include <LibWeb/Layout/BlockContainer.h>
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#include <LibWeb/Layout/InlineNode.h>
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#include <LibWeb/Layout/LayoutState.h>
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#include <LibWeb/Layout/TextNode.h>
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namespace Web::Layout {
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// This class iterates over all the inline-level objects within an inline formatting context.
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// By repeatedly calling next() with the remaining available width on the current line,
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// it returns an "Item" representing the next piece of inline-level content to be placed on the line.
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class InlineLevelIterator {
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AK_MAKE_NONCOPYABLE(InlineLevelIterator);
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AK_MAKE_NONMOVABLE(InlineLevelIterator);
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public:
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struct Item {
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enum class Type {
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Text,
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Element,
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ForcedBreak,
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AbsolutelyPositionedElement,
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FloatingElement,
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};
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Type type {};
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JS::GCPtr<Layout::Node const> node {};
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size_t offset_in_node { 0 };
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size_t length_in_node { 0 };
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CSSPixels width { 0.0f };
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CSSPixels padding_start { 0.0f };
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CSSPixels padding_end { 0.0f };
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CSSPixels border_start { 0.0f };
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CSSPixels border_end { 0.0f };
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CSSPixels margin_start { 0.0f };
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CSSPixels margin_end { 0.0f };
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bool is_collapsible_whitespace { false };
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CSSPixels border_box_width() const
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{
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return border_start + padding_start + width + padding_end + border_end;
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}
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};
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InlineLevelIterator(Layout::InlineFormattingContext&, LayoutState&, Layout::BlockContainer const&, LayoutMode);
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Optional<Item> next();
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CSSPixels next_non_whitespace_sequence_width();
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private:
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Optional<Item> next_without_lookahead();
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void skip_to_next();
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void compute_next();
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void enter_text_node(Layout::TextNode const&);
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void enter_node_with_box_model_metrics(Layout::NodeWithStyleAndBoxModelMetrics const&);
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void exit_node_with_box_model_metrics();
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void add_extra_box_model_metrics_to_item(Item&, bool add_leading_metrics, bool add_trailing_metrics);
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Layout::Node const* next_inline_node_in_pre_order(Layout::Node const& current, Layout::Node const* stay_within);
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Layout::InlineFormattingContext& m_inline_formatting_context;
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Layout::LayoutState& m_layout_state;
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JS::NonnullGCPtr<Layout::BlockContainer const> m_container;
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Layout::LayoutState::UsedValues const& m_container_state;
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JS::GCPtr<Layout::Node const> m_current_node;
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JS::GCPtr<Layout::Node const> m_next_node;
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LayoutMode const m_layout_mode;
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struct TextNodeContext {
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bool do_collapse {};
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bool do_wrap_lines {};
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bool do_respect_linebreaks {};
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bool is_first_chunk {};
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bool is_last_chunk {};
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TextNode::ChunkIterator chunk_iterator;
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Optional<TextNode::Chunk> next_chunk {};
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};
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Optional<TextNodeContext> m_text_node_context;
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struct ExtraBoxMetrics {
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CSSPixels margin { 0 };
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CSSPixels border { 0 };
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CSSPixels padding { 0 };
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};
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Optional<ExtraBoxMetrics> m_extra_leading_metrics;
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Optional<ExtraBoxMetrics> m_extra_trailing_metrics;
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Vector<JS::NonnullGCPtr<NodeWithStyleAndBoxModelMetrics const>> m_box_model_node_stack;
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Queue<InlineLevelIterator::Item> m_lookahead_items;
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};
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}
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