11e7d72686
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Append text chunks to either the start or end of the text fragment, depending on the text direction. The direction is determined by what script its code points are from.
71 lines
2.2 KiB
C++
71 lines
2.2 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 <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);
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~LineBuilder();
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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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CSSPixels current_y() const { return m_current_y; }
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void set_current_y(CSSPixels y) { m_current_y = y; }
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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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auto& inline_formatting_context() { return m_context; }
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private:
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void begin_new_line(bool increment_y, bool is_first_break_in_sequence = true);
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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_y { 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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CSS::Direction m_direction { CSS::Direction::Ltr };
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bool m_last_line_needs_update { false };
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};
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}
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