d05b30a8dc
When an inline flex fragment raises the line box baseline, include the parent strut descent in the line box bottom and advance the next line from that enlarged line box. This keeps following wrapped or broken lines from overlapping the extra descent. Add ref and text coverage for inline-flex line height and line advancement.
75 lines
2.5 KiB
C++
75 lines
2.5 KiB
C++
/*
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* Copyright (c) 2022, 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 <LibWeb/Layout/InlineFormattingContext.h>
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namespace Web::Layout {
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class LineBuilder {
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AK_MAKE_NONCOPYABLE(LineBuilder);
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AK_MAKE_NONMOVABLE(LineBuilder);
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public:
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LineBuilder(InlineFormattingContext&, LayoutState&, LayoutState::UsedValues& containing_block_used_values, CSS::Direction, CSS::WritingMode);
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enum class ForcedBreak {
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No,
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Yes,
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};
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void break_line(ForcedBreak, Optional<CSSPixels> next_item_width = {});
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void append_box(Box const&, CSSPixels leading_size, CSSPixels trailing_size, CSSPixels leading_margin, CSSPixels trailing_margin);
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void append_text_chunk(TextNode const&, size_t offset_in_node, size_t length_in_node, CSSPixels leading_size, CSSPixels trailing_size, CSSPixels leading_margin, CSSPixels trailing_margin, CSSPixels content_width, CSSPixels content_height, RefPtr<Gfx::GlyphRun>);
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// Returns whether a line break occurred.
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bool break_if_needed(CSSPixels next_item_width)
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{
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if (should_break(next_item_width)) {
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break_line(LineBuilder::ForcedBreak::No, next_item_width);
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return true;
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}
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return false;
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}
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void update_last_line();
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void remove_last_line_if_empty();
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void set_trailing_whitespace_on_previous_line();
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CSSPixels current_block_offset() const { return m_current_block_offset; }
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void recalculate_available_space();
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CSSPixels y_for_float_to_be_inserted_here(Box const&);
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void did_introduce_clearance(CSSPixels);
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private:
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void begin_new_line(bool increment_y, bool is_first_break_in_sequence = true, ForcedBreak = ForcedBreak::No);
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bool should_break(CSSPixels next_item_width);
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LineBox& ensure_last_line_box();
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InlineFormattingContext& m_context;
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LayoutState& m_layout_state;
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LayoutState::UsedValues& m_containing_block_used_values;
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AvailableSize m_available_width_for_current_line { AvailableSize::make_indefinite() };
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CSSPixels m_current_block_offset { 0 };
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CSSPixels m_max_height_on_current_line { 0 };
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CSSPixels m_text_indent { 0 };
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bool m_text_indent_hanging : 1 { false };
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bool m_text_indent_each_line : 1 { false };
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CSS::Direction m_direction { CSS::Direction::Ltr };
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CSS::WritingMode m_writing_mode { CSS::WritingMode::HorizontalTb };
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bool m_last_line_needs_update { false };
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bool m_should_advance_to_last_line_box_bottom { false };
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};
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}
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