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/*
* Copyright (c) 2022, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <LibWeb/Layout/InlineFormattingContext.h>
namespace Web::Layout {
class LineBuilder {
AK_MAKE_NONCOPYABLE(LineBuilder);
AK_MAKE_NONMOVABLE(LineBuilder);
public:
LineBuilder(InlineFormattingContext&, LayoutState&);
~LineBuilder();
void break_line(Optional<CSSPixels> next_item_width = {});
void append_box(Box const&, CSSPixels leading_size, CSSPixels trailing_size, CSSPixels leading_margin, CSSPixels trailing_margin);
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);
// Returns whether a line break occurred.
bool break_if_needed(CSSPixels next_item_width)
{
if (should_break(next_item_width)) {
break_line(next_item_width);
return true;
}
return false;
}
CSSPixels available_width_for_current_line() const { return m_available_width_for_current_line; }
void update_last_line();
void remove_last_line_if_empty();
CSSPixels current_y() const { return m_current_y; }
void set_current_y(CSSPixels y) { m_current_y = y; }
void recalculate_available_space();
CSSPixels y_for_float_to_be_inserted_here(Box const&);
private:
void begin_new_line(bool increment_y, bool is_first_break_in_sequence = true);
bool should_break(CSSPixels next_item_width);
LineBox& ensure_last_line_box();
InlineFormattingContext& m_context;
LayoutState& m_layout_state;
LayoutState::UsedValues& m_containing_block_state;
CSSPixels m_available_width_for_current_line { 0 };
CSSPixels m_current_y { 0 };
CSSPixels m_max_height_on_current_line { 0 };
bool m_last_line_needs_update { false };
};
}
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