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https://github.com/RGBCube/serenity
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f2a917229a
Here's roughly how this works: - InlineLevelIterator keeps a nesting stack of inline-level nodes with box model metrics. - When entering a node with box model metrics, we add them to the current "leading metrics". - When exiting a node with box model metrics, we add them to the current "trailing metrics". - Pending leading metrics are consumed by the first fragment added to the line. - Pending trailing metrics are consumed by the last fragment added to the line. Like before, the position of a line box fragment is the top left of its content box. However, fragments are placed horizontally along the line with space inserted for padding and border. InlineNode::paint() now expands the content rect as appropriate when painting background and borders. Note that margins and margin collapsing is not yet implemented. This makes the eyes on ACID2 horizontally centered. :^)
50 lines
1.3 KiB
C++
50 lines
1.3 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 <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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explicit LineBuilder(InlineFormattingContext&);
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~LineBuilder();
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void break_line();
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void append_box(Box&, float leading_size, float trailing_size);
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void append_text_chunk(TextNode&, size_t offset_in_node, size_t length_in_node, float leading_size, float trailing_size, float content_width, float content_height);
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void break_if_needed(LayoutMode layout_mode, float next_item_width, bool should_force_break)
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{
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if (should_break(layout_mode, next_item_width, should_force_break))
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break_line();
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}
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float available_width_for_current_line() const { return m_available_width_for_current_line; }
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void update_last_line();
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void remove_last_line_if_empty();
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private:
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void begin_new_line(bool increment_y);
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bool should_break(LayoutMode, float next_item_width, bool should_force_break);
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InlineFormattingContext& m_context;
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float m_available_width_for_current_line { 0 };
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float m_current_y { 0 };
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float m_max_height_on_current_line { 0 };
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bool m_last_line_needs_update { false };
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};
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}
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