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 "CSSToLengthConversionData.h" 33 34#include "RenderStyle.h" 35#include "RenderView.h" 36 37namespace WebCore { 38 39float CSSToLengthConversionData::zoom() const 40{ 41 if (m_useEffectiveZoom) 42 return m_style ? m_style->effectiveZoom() : 1; 43 return m_zoom; 44} 45 46double CSSToLengthConversionData::viewportWidthFactor() const 47{ 48 if (m_style && !m_computingFontSize) 49 m_style->setHasViewportUnits(); 50 51 if (!m_renderView) 52 return 0; 53 54 return m_renderView->viewportSizeForCSSViewportUnits().width() / 100.0; 55} 56 57double CSSToLengthConversionData::viewportHeightFactor() const 58{ 59 if (m_style && !m_computingFontSize) 60 m_style->setHasViewportUnits(); 61 62 if (!m_renderView) 63 return 0; 64 65 return m_renderView->viewportSizeForCSSViewportUnits().height() / 100.0; 66} 67 68double CSSToLengthConversionData::viewportMinFactor() const 69{ 70 if (m_style && !m_computingFontSize) 71 m_style->setHasViewportUnits(); 72 73 if (!m_renderView) 74 return 0; 75 76 IntSize viewportSizeForCSSViewportUnits = m_renderView->viewportSizeForCSSViewportUnits(); 77 return std::min(viewportSizeForCSSViewportUnits.width(), viewportSizeForCSSViewportUnits.height()) / 100.0; 78} 79 80double CSSToLengthConversionData::viewportMaxFactor() const 81{ 82 if (m_style && !m_computingFontSize) 83 m_style->setHasViewportUnits(); 84 85 if (!m_renderView) 86 return 0; 87 88 IntSize viewportSizeForCSSViewportUnits = m_renderView->viewportSizeForCSSViewportUnits(); 89 return std::max(viewportSizeForCSSViewportUnits.width(), viewportSizeForCSSViewportUnits.height()) / 100.0; 90} 91 92} // namespace WebCore 93