1 /* 2 * Copyright (C) 2013 Google Inc. 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 are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include "config.h" 32 #include "core/css/CSSToLengthConversionData.h" 33 34 #include "core/rendering/RenderView.h" 35 #include "core/rendering/style/RenderStyle.h" 36 37 namespace blink { 38 39 CSSToLengthConversionData::CSSToLengthConversionData(const RenderStyle* style, const RenderStyle* rootStyle, const RenderView* renderView, float zoom, bool computingFontSize) 40 : m_style(style) 41 , m_rootStyle(rootStyle) 42 , m_viewportWidth(renderView ? renderView->layoutViewportWidth() : 0) 43 , m_viewportHeight(renderView ? renderView->layoutViewportHeight() : 0) 44 , m_zoom(zoom) 45 , m_useEffectiveZoom(false) 46 , m_computingFontSize(computingFontSize) 47 { 48 ASSERT(zoom > 0); 49 } 50 51 CSSToLengthConversionData::CSSToLengthConversionData(const RenderStyle* style, const RenderStyle* rootStyle, const RenderView* renderView, bool computingFontSize) 52 : m_style(style) 53 , m_rootStyle(rootStyle) 54 , m_viewportWidth(renderView ? renderView->layoutViewportWidth() : 0) 55 , m_viewportHeight(renderView ? renderView->layoutViewportHeight() : 0) 56 , m_useEffectiveZoom(true) 57 , m_computingFontSize(computingFontSize) 58 { 59 } 60 61 CSSToLengthConversionData::CSSToLengthConversionData(const RenderStyle* style, const RenderStyle* rootStyle, float viewportWidth, float viewportHeight, float zoom, bool computingFontSize) 62 : m_style(style) 63 , m_rootStyle(rootStyle) 64 , m_viewportWidth(viewportWidth) 65 , m_viewportHeight(viewportHeight) 66 , m_zoom(zoom) 67 , m_useEffectiveZoom(false) 68 , m_computingFontSize(computingFontSize) 69 { 70 ASSERT(zoom > 0); 71 } 72 73 float CSSToLengthConversionData::zoom() const 74 { 75 if (m_useEffectiveZoom) 76 return m_style ? m_style->effectiveZoom() : 1; 77 return m_zoom; 78 } 79 80 double CSSToLengthConversionData::viewportWidthPercent() const 81 { 82 m_style->setHasViewportUnits(); 83 return m_viewportWidth / 100; 84 } 85 double CSSToLengthConversionData::viewportHeightPercent() const 86 { 87 m_style->setHasViewportUnits(); 88 return m_viewportHeight / 100; 89 } 90 double CSSToLengthConversionData::viewportMinPercent() const 91 { 92 m_style->setHasViewportUnits(); 93 return std::min(m_viewportWidth, m_viewportHeight) / 100; 94 } 95 double CSSToLengthConversionData::viewportMaxPercent() const 96 { 97 m_style->setHasViewportUnits(); 98 return std::max(m_viewportWidth, m_viewportHeight) / 100; 99 } 100 101 } // namespace blink 102
