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      1 /*
      2  * Copyright (C) 2003, 2006, 2009 Apple Inc. All rights reserved.
      3  * Copyright (C) 2010 Google Inc. All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  *
      9  * 1.  Redistributions of source code must retain the above copyright
     10  *     notice, this list of conditions and the following disclaimer.
     11  * 2.  Redistributions in binary form must reproduce the above copyright
     12  *     notice, this list of conditions and the following disclaimer in the
     13  *     documentation and/or other materials provided with the distribution.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
     16  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     17  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     18  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
     19  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     20  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     21  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
     22  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     25  */
     26 
     27 #include "config.h"
     28 #include "RoundedIntRect.h"
     29 
     30 #include "IntRect.h"
     31 #include <algorithm>
     32 
     33 using namespace std;
     34 
     35 namespace WebCore {
     36 
     37 bool RoundedIntRect::Radii::isZero() const
     38 {
     39     return m_topLeft.isZero() && m_topRight.isZero() && m_bottomLeft.isZero() && m_bottomRight.isZero();
     40 }
     41 
     42 void RoundedIntRect::Radii::scale(float factor)
     43 {
     44     if (factor == 1)
     45         return;
     46 
     47     // If either radius on a corner becomes zero, reset both radii on that corner.
     48     m_topLeft.scale(factor);
     49     if (!m_topLeft.width() || !m_topLeft.height())
     50         m_topLeft = IntSize();
     51     m_topRight.scale(factor);
     52     if (!m_topRight.width() || !m_topRight.height())
     53         m_topRight = IntSize();
     54     m_bottomLeft.scale(factor);
     55     if (!m_bottomLeft.width() || !m_bottomLeft.height())
     56         m_bottomLeft = IntSize();
     57     m_bottomRight.scale(factor);
     58     if (!m_bottomRight.width() || !m_bottomRight.height())
     59         m_bottomRight = IntSize();
     60 
     61 }
     62 
     63 void RoundedIntRect::Radii::expand(int topWidth, int bottomWidth, int leftWidth, int rightWidth)
     64 {
     65     m_topLeft.setWidth(max(0, m_topLeft.width() + leftWidth));
     66     m_topLeft.setHeight(max(0, m_topLeft.height() + topWidth));
     67 
     68     m_topRight.setWidth(max(0, m_topRight.width() + rightWidth));
     69     m_topRight.setHeight(max(0, m_topRight.height() + topWidth));
     70 
     71     m_bottomLeft.setWidth(max(0, m_bottomLeft.width() + leftWidth));
     72     m_bottomLeft.setHeight(max(0, m_bottomLeft.height() + bottomWidth));
     73 
     74     m_bottomRight.setWidth(max(0, m_bottomRight.width() + rightWidth));
     75     m_bottomRight.setHeight(max(0, m_bottomRight.height() + bottomWidth));
     76 }
     77 
     78 void RoundedIntRect::Radii::includeLogicalEdges(const RoundedIntRect::Radii& edges, bool isHorizontal, bool includeLogicalLeftEdge, bool includeLogicalRightEdge)
     79 {
     80     if (includeLogicalLeftEdge) {
     81         if (isHorizontal)
     82             m_bottomLeft = edges.bottomLeft();
     83         else
     84             m_topRight = edges.topRight();
     85         m_topLeft = edges.topLeft();
     86     }
     87 
     88     if (includeLogicalRightEdge) {
     89         if (isHorizontal)
     90             m_topRight = edges.topRight();
     91         else
     92             m_bottomLeft = edges.bottomLeft();
     93         m_bottomRight = edges.bottomRight();
     94     }
     95 }
     96 
     97 void RoundedIntRect::Radii::excludeLogicalEdges(bool isHorizontal, bool excludeLogicalLeftEdge, bool excludeLogicalRightEdge)
     98 {
     99     if (excludeLogicalLeftEdge) {
    100         if (isHorizontal)
    101             m_bottomLeft = IntSize();
    102         else
    103             m_topRight = IntSize();
    104         m_topLeft = IntSize();
    105     }
    106 
    107     if (excludeLogicalRightEdge) {
    108         if (isHorizontal)
    109             m_topRight = IntSize();
    110         else
    111             m_bottomLeft = IntSize();
    112         m_bottomRight = IntSize();
    113     }
    114 }
    115 
    116 RoundedIntRect::RoundedIntRect(int x, int y, int width, int height)
    117     : m_rect(x, y, width, height)
    118 {
    119 }
    120 
    121 RoundedIntRect::RoundedIntRect(const IntRect& rect, const Radii& radii)
    122     : m_rect(rect)
    123     , m_radii(radii)
    124 {
    125 }
    126 
    127 RoundedIntRect::RoundedIntRect(const IntRect& rect, const IntSize& topLeft, const IntSize& topRight, const IntSize& bottomLeft, const IntSize& bottomRight)
    128     : m_rect(rect)
    129     , m_radii(topLeft, topRight, bottomLeft, bottomRight)
    130 {
    131 }
    132 
    133 void RoundedIntRect::includeLogicalEdges(const Radii& edges, bool isHorizontal, bool includeLogicalLeftEdge, bool includeLogicalRightEdge)
    134 {
    135     m_radii.includeLogicalEdges(edges, isHorizontal, includeLogicalLeftEdge, includeLogicalRightEdge);
    136 }
    137 
    138 void RoundedIntRect::excludeLogicalEdges(bool isHorizontal, bool excludeLogicalLeftEdge, bool excludeLogicalRightEdge)
    139 {
    140     m_radii.excludeLogicalEdges(isHorizontal, excludeLogicalLeftEdge, excludeLogicalRightEdge);
    141 }
    142 
    143 bool RoundedIntRect::isRenderable() const
    144 {
    145     return m_radii.topLeft().width() + m_radii.topRight().width() <= m_rect.width()
    146         && m_radii.bottomLeft().width() + m_radii.bottomRight().width() <= m_rect.width()
    147         && m_radii.topLeft().height() + m_radii.topRight().height() <= m_rect.height()
    148         && m_radii.bottomLeft().height() + m_radii.bottomRight().height() <= m_rect.height();
    149 }
    150 
    151 } // namespace WebCore
    152