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/*
* Copyright (C) 2013 Adobe Systems Incorporated. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_LINE_LINE_WIDTH_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_LINE_LINE_WIDTH_H_
#include "third_party/blink/renderer/core/layout/api/line_layout_block_flow.h"
#include "third_party/blink/renderer/platform/geometry/layout_unit.h"
#include "third_party/blink/renderer/platform/wtf/allocator.h"
namespace blink {
class FloatingObject;
class LineLayoutRubyRun;
enum WhitespaceTreatment { kExcludeWhitespace, kIncludeWhitespace };
class LineWidth {
STACK_ALLOCATED();
public:
LineWidth(LineLayoutBlockFlow, bool is_first_line, IndentTextOrNot);
bool FitsOnLine() const {
return LayoutUnit::FromFloatFloor(CurrentWidth()) <=
available_width_ + LayoutUnit::Epsilon();
}
bool FitsOnLine(float extra) const {
float total_width = CurrentWidth() + extra;
return LayoutUnit::FromFloatFloor(total_width) <=
available_width_ + LayoutUnit::Epsilon();
}
bool FitsOnLine(float extra, WhitespaceTreatment whitespace_treatment) const {
LayoutUnit w = LayoutUnit::FromFloatFloor(CurrentWidth() + extra);
if (whitespace_treatment == kExcludeWhitespace)
w -= LayoutUnit::FromFloatCeil(TrailingWhitespaceWidth());
return w <= available_width_;
}
// Note that m_uncommittedWidth may not be LayoutUnit-snapped at this point.
// Because currentWidth() is used by the code that lays out words in a single
// LayoutText, it's expected that offsets will not be snapped until an
// InlineBox boundary is reached.
float CurrentWidth() const { return committed_width_ + uncommitted_width_; }
// FIXME: We should eventually replace these three functions by ones that work
// on a higher abstraction.
float UncommittedWidth() const { return uncommitted_width_; }
float CommittedWidth() const { return committed_width_; }
float AvailableWidth() const { return available_width_; }
float TrailingWhitespaceWidth() const { return trailing_whitespace_width_; }
void UpdateAvailableWidth(LayoutUnit minimum_height = LayoutUnit());
void ShrinkAvailableWidthForNewFloatIfNeeded(const FloatingObject&);
void AddUncommittedWidth(float delta) { uncommitted_width_ += delta; }
void Commit();
void ApplyOverhang(LineLayoutRubyRun,
LineLayoutItem start_layout_item,
LineLayoutItem end_layout_item);
void FitBelowFloats(bool is_first_line = false);
void SetTrailingWhitespaceWidth(float width) {
trailing_whitespace_width_ = width;
}
void SnapAtNodeBoundary() {
if (!uncommitted_width_) {
committed_width_ = LayoutUnit::FromFloatCeil(committed_width_).ToFloat();
} else {
uncommitted_width_ =
LayoutUnit::FromFloatCeil(committed_width_ + uncommitted_width_)
.ToFloat() -
committed_width_;
}
}
IndentTextOrNot IndentText() const { return indent_text_; }
private:
void ComputeAvailableWidthFromLeftAndRight();
void UpdateLineDimension(LayoutUnit new_line_top,
LayoutUnit new_line_width,
const LayoutUnit& new_line_left,
const LayoutUnit& new_line_right);
void WrapNextToShapeOutside(bool is_first_line);
LineLayoutBlockFlow block_;
float uncommitted_width_;
float committed_width_;
// The amount by which |m_availableWidth| has been inflated to account for
// possible contraction due to ruby overhang.
float overhang_width_;
float trailing_whitespace_width_;
LayoutUnit left_;
LayoutUnit right_;
LayoutUnit available_width_;
bool is_first_line_;
IndentTextOrNot indent_text_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_LINE_LINE_WIDTH_H_
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