217 lines
6.6 KiB
C++
217 lines
6.6 KiB
C++
/*
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* Copyright (c) 2012, Google Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Google Inc. nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "FloatSize.h"
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#include "IntSize.h"
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#include "LayoutUnit.h"
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namespace WTF {
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class TextStream;
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}
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namespace WebCore {
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class LayoutPoint;
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enum AspectRatioFit {
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AspectRatioFitShrink,
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AspectRatioFitGrow
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};
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class LayoutSize {
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public:
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LayoutSize() : m_width(0), m_height(0) { }
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LayoutSize(const IntSize& size) : m_width(size.width()), m_height(size.height()) { }
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template<typename T, typename U> LayoutSize(T width, U height) : m_width(width), m_height(height) { }
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explicit LayoutSize(const FloatSize& size) : m_width(size.width()), m_height(size.height()) { }
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LayoutUnit width() const { return m_width; }
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LayoutUnit height() const { return m_height; }
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template<typename T> void setWidth(T width) { m_width = width; }
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template<typename T> void setHeight(T height) { m_height = height; }
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bool isEmpty() const { return m_width <= 0 || m_height <= 0; }
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bool isZero() const { return !m_width && !m_height; }
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float aspectRatio() const { return static_cast<float>(m_width) / static_cast<float>(m_height); }
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template<typename T, typename U>
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void expand(T width, U height)
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{
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m_width += width;
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m_height += height;
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}
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void shrink(LayoutUnit width, LayoutUnit height)
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{
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m_width -= width;
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m_height -= height;
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}
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void scale(float scale)
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{
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m_width *= scale;
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m_height *= scale;
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}
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void scale(float widthScale, float heightScale)
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{
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m_width *= widthScale;
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m_height *= heightScale;
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}
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LayoutSize constrainedBetween(const LayoutSize& min, const LayoutSize& max) const;
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LayoutSize expandedTo(const LayoutSize& other) const
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{
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return LayoutSize(m_width > other.m_width ? m_width : other.m_width,
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m_height > other.m_height ? m_height : other.m_height);
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}
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LayoutSize shrunkTo(const LayoutSize& other) const
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{
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return LayoutSize(m_width < other.m_width ? m_width : other.m_width,
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m_height < other.m_height ? m_height : other.m_height);
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}
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void clampNegativeToZero()
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{
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*this = expandedTo(LayoutSize());
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}
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void clampToMinimumSize(const LayoutSize& minimumSize)
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{
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if (m_width < minimumSize.width())
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m_width = minimumSize.width();
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if (m_height < minimumSize.height())
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m_height = minimumSize.height();
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}
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LayoutSize transposedSize() const
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{
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return LayoutSize(m_height, m_width);
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}
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operator FloatSize() const { return FloatSize(m_width, m_height); }
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LayoutSize fitToAspectRatio(const LayoutSize& aspectRatio, AspectRatioFit fit) const
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{
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float heightScale = height().toFloat() / aspectRatio.height().toFloat();
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float widthScale = width().toFloat() / aspectRatio.width().toFloat();
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if ((widthScale > heightScale) != (fit == AspectRatioFitGrow))
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return LayoutSize(height() * aspectRatio.width() / aspectRatio.height(), height());
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return LayoutSize(width(), width() * aspectRatio.height() / aspectRatio.width());
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}
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bool mightBeSaturated() const
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{
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return m_width.mightBeSaturated() || m_height.mightBeSaturated();
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}
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private:
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LayoutUnit m_width;
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LayoutUnit m_height;
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};
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inline LayoutSize& operator+=(LayoutSize& a, const LayoutSize& b)
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{
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a.setWidth(a.width() + b.width());
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a.setHeight(a.height() + b.height());
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return a;
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}
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inline LayoutSize& operator-=(LayoutSize& a, const LayoutSize& b)
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{
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a.setWidth(a.width() - b.width());
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a.setHeight(a.height() - b.height());
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return a;
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}
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inline LayoutSize operator+(const LayoutSize& a, const LayoutSize& b)
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{
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return LayoutSize(a.width() + b.width(), a.height() + b.height());
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}
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inline LayoutSize operator-(const LayoutSize& a, const LayoutSize& b)
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{
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return LayoutSize(a.width() - b.width(), a.height() - b.height());
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}
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inline LayoutSize operator-(const LayoutSize& size)
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{
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return LayoutSize(-size.width(), -size.height());
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}
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inline bool operator==(const LayoutSize& a, const LayoutSize& b)
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{
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return a.width() == b.width() && a.height() == b.height();
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}
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inline bool operator!=(const LayoutSize& a, const LayoutSize& b)
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{
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return a.width() != b.width() || a.height() != b.height();
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}
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inline IntSize flooredIntSize(const LayoutSize& s)
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{
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return IntSize(s.width().floor(), s.height().floor());
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}
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inline IntSize ceiledIntSize(const LayoutSize& s)
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{
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return IntSize(s.width().ceil(), s.height().ceil());
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}
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inline IntSize roundedIntSize(const LayoutSize& s)
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{
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return IntSize(s.width().round(), s.height().round());
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}
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inline FloatSize floorSizeToDevicePixels(const LayoutSize& size, float pixelSnappingFactor)
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{
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return FloatSize(floorToDevicePixel(size.width(), pixelSnappingFactor), floorToDevicePixel(size.height(), pixelSnappingFactor));
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}
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inline FloatSize roundSizeToDevicePixels(const LayoutSize& size, float pixelSnappingFactor)
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{
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return FloatSize(roundToDevicePixel(size.width(), pixelSnappingFactor), roundToDevicePixel(size.height(), pixelSnappingFactor));
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}
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WEBCORE_EXPORT WTF::TextStream& operator<<(WTF::TextStream&, const LayoutSize&);
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} // namespace WebCore
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