0d656c3027
The static position of an absolutely positioned inline child is the in-flow insertion point on the line where it appears. Previously this was reconstructed after layout by walking previous siblings for a line-box fragment. That lookup could match a fragment from an earlier line and collapse multiple abspos children onto the same position, especially in white-space preserving content. Instead, drop a zero-width static-position marker into the line box at the insertion point when each abspos child is encountered. The marker is carried through normal line post-processing, including float intrusion, text-align, justification, trailing-whitespace trimming and ellipsis, so the final static position is resolved from the line itself. Resolve marker-only trailing lines before removing them, so they can provide static position without contributing line height.
56 lines
1.9 KiB
C++
56 lines
1.9 KiB
C++
/*
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* Copyright (c) 2020-2024, Andreas Kling <andreas@ladybird.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/Types.h>
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#include <LibWeb/Forward.h>
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#include <LibWeb/Layout/BlockContainer.h>
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#include <LibWeb/Layout/FormattingContext.h>
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namespace Web::Layout {
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class InlineFormattingContext final : public FormattingContext {
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public:
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InlineFormattingContext(LayoutState&, LayoutMode, BlockContainer const& containing_block, LayoutState::UsedValues& containing_block_used_values, BlockFormattingContext& parent);
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~InlineFormattingContext();
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BlockFormattingContext& parent();
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BlockFormattingContext const& parent() const;
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BlockContainer const& containing_block() const { return static_cast<BlockContainer const&>(context_box()); }
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virtual void run(AvailableSpace const&) override;
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virtual CSSPixels automatic_content_height() const override;
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virtual CSSPixels automatic_content_width() const override;
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void dimension_box_on_line(Box const&, LayoutMode);
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CSSPixels leftmost_inline_offset_at(CSSPixels y) const;
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AvailableSize available_space_for_line(CSSPixels y) const;
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bool any_floats_intrude_at_block_offset(CSSPixels block_offset) const;
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bool can_fit_new_line_at_block_offset(CSSPixels block_offset) const;
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CSSPixels vertical_float_clearance() const;
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void set_vertical_float_clearance(CSSPixels);
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private:
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void generate_line_boxes();
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void apply_text_overflow_ellipsis(Vector<LineBox>&);
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void apply_justification_to_fragments(CSS::TextJustify, LineBox&, bool is_last_line);
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StaticPositionRect calculate_inline_end_static_position_rect() const;
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LayoutState::UsedValues& m_containing_block_used_values;
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Optional<AvailableSpace> m_available_space;
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CSSPixels m_automatic_content_width { 0 };
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CSSPixels m_automatic_content_height { 0 };
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CSSPixels m_vertical_float_clearance { 0 };
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};
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}
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