1/* 2 * Copyright (C) 2013 Adobe Systems Incorporated. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above 9 * copyright notice, this list of conditions and the following 10 * disclaimer. 11 * 2. Redistributions in binary form must reproduce the above 12 * copyright notice, this list of conditions and the following 13 * disclaimer in the documentation and/or other materials 14 * provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 19 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 20 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 21 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 25 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 27 * OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30#include "config.h" 31#include "core/rendering/shapes/BoxShape.h" 32 33#include "wtf/MathExtras.h" 34 35namespace blink { 36 37LayoutRect BoxShape::shapeMarginLogicalBoundingBox() const 38{ 39 FloatRect marginBounds(m_bounds.rect()); 40 if (shapeMargin() > 0) 41 marginBounds.inflate(shapeMargin()); 42 return static_cast<LayoutRect>(marginBounds); 43} 44 45FloatRoundedRect BoxShape::shapeMarginBounds() const 46{ 47 FloatRoundedRect marginBounds(m_bounds); 48 if (shapeMargin() > 0) { 49 marginBounds.inflate(shapeMargin()); 50 marginBounds.expandRadii(shapeMargin()); 51 } 52 return marginBounds; 53} 54 55LineSegment BoxShape::getExcludedInterval(LayoutUnit logicalTop, LayoutUnit logicalHeight) const 56{ 57 const FloatRoundedRect& marginBounds = shapeMarginBounds(); 58 if (marginBounds.isEmpty() || !lineOverlapsShapeMarginBounds(logicalTop, logicalHeight)) 59 return LineSegment(); 60 61 float y1 = logicalTop.toFloat(); 62 float y2 = (logicalTop + logicalHeight).toFloat(); 63 const FloatRect& rect = marginBounds.rect(); 64 65 if (!marginBounds.isRounded()) 66 return LineSegment(marginBounds.rect().x(), marginBounds.rect().maxX()); 67 68 float topCornerMaxY = std::max<float>(marginBounds.topLeftCorner().maxY(), marginBounds.topRightCorner().maxY()); 69 float bottomCornerMinY = std::min<float>(marginBounds.bottomLeftCorner().y(), marginBounds.bottomRightCorner().y()); 70 71 if (topCornerMaxY <= bottomCornerMinY && y1 <= topCornerMaxY && y2 >= bottomCornerMinY) 72 return LineSegment(rect.x(), rect.maxX()); 73 74 float x1 = rect.maxX(); 75 float x2 = rect.x(); 76 float minXIntercept; 77 float maxXIntercept; 78 79 if (y1 <= marginBounds.topLeftCorner().maxY() && y2 >= marginBounds.bottomLeftCorner().y()) 80 x1 = rect.x(); 81 82 if (y1 <= marginBounds.topRightCorner().maxY() && y2 >= marginBounds.bottomRightCorner().y()) 83 x2 = rect.maxX(); 84 85 if (marginBounds.xInterceptsAtY(y1, minXIntercept, maxXIntercept)) { 86 x1 = std::min<float>(x1, minXIntercept); 87 x2 = std::max<float>(x2, maxXIntercept); 88 } 89 90 if (marginBounds.xInterceptsAtY(y2, minXIntercept, maxXIntercept)) { 91 x1 = std::min<float>(x1, minXIntercept); 92 x2 = std::max<float>(x2, maxXIntercept); 93 } 94 95 ASSERT(x2 >= x1); 96 return LineSegment(x1, x2); 97} 98 99void BoxShape::buildDisplayPaths(DisplayPaths& paths) const 100{ 101 paths.shape.addRoundedRect(m_bounds.rect(), m_bounds.radii().topLeft(), m_bounds.radii().topRight(), m_bounds.radii().bottomLeft(), m_bounds.radii().bottomRight()); 102 if (shapeMargin()) 103 paths.marginShape.addRoundedRect(shapeMarginBounds().rect(), shapeMarginBounds().radii().topLeft(), shapeMarginBounds().radii().topRight(), shapeMarginBounds().radii().bottomLeft(), shapeMarginBounds().radii().bottomRight()); 104} 105 106} // namespace blink 107