1/* 2 * Copyright (C) 2012 Intel Corporation. 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 HOLDER “AS IS” AND ANY 17 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE 20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, 21 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 23 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR 25 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 26 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30#include "config.h" 31#include "ViewportStyleResolver.h" 32 33#if ENABLE(CSS_DEVICE_ADAPTATION) 34 35#include "CSSValueKeywords.h" 36#include "Document.h" 37#include "Page.h" 38#include "RenderView.h" 39#include "StylePropertySet.h" 40#include "StyleRule.h" 41#include "ViewportArguments.h" 42 43namespace WebCore { 44 45ViewportStyleResolver::ViewportStyleResolver(Document* document) 46 : m_document(document) 47{ 48 ASSERT(m_document); 49} 50 51ViewportStyleResolver::~ViewportStyleResolver() 52{ 53} 54 55void ViewportStyleResolver::addViewportRule(StyleRuleViewport* viewportRule) 56{ 57 StylePropertySet* propertySet = viewportRule->mutableProperties(); 58 59 unsigned propertyCount = propertySet->propertyCount(); 60 if (!propertyCount) 61 return; 62 63 if (!m_propertySet) { 64 m_propertySet = propertySet->mutableCopy(); 65 return; 66 } 67 68 m_propertySet->mergeAndOverrideOnConflict(propertySet); 69} 70 71void ViewportStyleResolver::clearDocument() 72{ 73 m_document = 0; 74} 75 76void ViewportStyleResolver::resolve() 77{ 78 if (!m_document || !m_propertySet) 79 return; 80 81 ViewportArguments arguments(ViewportArguments::CSSDeviceAdaptation); 82 83 arguments.userZoom = getViewportArgumentValue(CSSPropertyUserZoom); 84 arguments.zoom = getViewportArgumentValue(CSSPropertyZoom); 85 arguments.minZoom = getViewportArgumentValue(CSSPropertyMinZoom); 86 arguments.maxZoom = getViewportArgumentValue(CSSPropertyMaxZoom); 87 arguments.minWidth = getViewportArgumentValue(CSSPropertyMinWidth); 88 arguments.maxWidth = getViewportArgumentValue(CSSPropertyMaxWidth); 89 arguments.minHeight = getViewportArgumentValue(CSSPropertyMinHeight); 90 arguments.maxHeight = getViewportArgumentValue(CSSPropertyMaxHeight); 91 arguments.orientation = getViewportArgumentValue(CSSPropertyOrientation); 92 93 m_document->setViewportArguments(arguments); 94 m_document->updateViewportArguments(); 95 96 m_propertySet = 0; 97} 98 99float ViewportStyleResolver::getViewportArgumentValue(CSSPropertyID id) const 100{ 101 float defaultValue = ViewportArguments::ValueAuto; 102 103 // UserZoom default value is CSSValueZoom, which maps to true, meaning that 104 // yes, it is user scalable. When the value is set to CSSValueFixed, we 105 // return false. 106 if (id == CSSPropertyUserZoom) 107 defaultValue = 1; 108 109 RefPtr<CSSValue> value = m_propertySet->getPropertyCSSValue(id); 110 if (!value || !value->isPrimitiveValue()) 111 return defaultValue; 112 113 CSSPrimitiveValue* primitiveValue = static_cast<CSSPrimitiveValue*>(value.get()); 114 115 if (primitiveValue->isNumber() || primitiveValue->isPx()) 116 return primitiveValue->getFloatValue(); 117 118 if (primitiveValue->isFontRelativeLength()) 119 return primitiveValue->getFloatValue() * m_document->documentElement()->renderStyle()->fontDescription().computedSize(); 120 121 if (primitiveValue->isPercentage()) { 122 float percentValue = primitiveValue->getFloatValue() / 100.0f; 123 switch (id) { 124 case CSSPropertyMaxHeight: 125 case CSSPropertyMinHeight: 126 ASSERT(m_document->initialViewportSize().height() > 0); 127 return percentValue * m_document->initialViewportSize().height(); 128 case CSSPropertyMaxWidth: 129 case CSSPropertyMinWidth: 130 ASSERT(m_document->initialViewportSize().width() > 0); 131 return percentValue * m_document->initialViewportSize().width(); 132 case CSSPropertyMaxZoom: 133 case CSSPropertyMinZoom: 134 case CSSPropertyZoom: 135 return percentValue; 136 default: 137 ASSERT_NOT_REACHED(); 138 break; 139 } 140 } 141 142 switch (primitiveValue->getIdent()) { 143 case CSSValueAuto: 144 return defaultValue; 145 case CSSValueDeviceHeight: 146 return ViewportArguments::ValueDeviceHeight; 147 case CSSValueDeviceWidth: 148 return ViewportArguments::ValueDeviceWidth; 149 case CSSValueLandscape: 150 return ViewportArguments::ValueLandscape; 151 case CSSValuePortrait: 152 return ViewportArguments::ValuePortrait; 153 case CSSValueZoom: 154 return defaultValue; 155 case CSSValueFixed: 156 return 0; 157 default: 158 return defaultValue; 159 } 160} 161 162} // namespace WebCore 163 164#endif // ENABLE(CSS_DEVICE_ADAPTATION) 165