1/* 2 * Copyright (C) 2007-2009 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 "V8CSSStyleDeclaration.h" 33 34#include "CSSParser.h" 35#include "CSSStyleDeclaration.h" 36#include "CSSValue.h" 37#include "CSSPrimitiveValue.h" 38#include "EventTarget.h" 39 40#include "V8Binding.h" 41#include "V8Proxy.h" 42 43#include <wtf/text/StringBuilder.h> 44#include <wtf/text/StringConcatenate.h> 45#include <wtf/ASCIICType.h> 46#include <wtf/PassRefPtr.h> 47#include <wtf/RefPtr.h> 48#include <wtf/StdLibExtras.h> 49#include <wtf/Vector.h> 50 51namespace WebCore { 52 53// FIXME: Next two functions look lifted verbatim from JSCSSStyleDeclarationCustom. Please remove duplication. 54 55// Check for a CSS prefix. 56// Passed prefix is all lowercase. 57// First character of the prefix within the property name may be upper or lowercase. 58// Other characters in the prefix within the property name must be lowercase. 59// The prefix within the property name must be followed by a capital letter. 60static bool hasCSSPropertyNamePrefix(const String& propertyName, const char* prefix) 61{ 62#ifndef NDEBUG 63 ASSERT(*prefix); 64 for (const char* p = prefix; *p; ++p) 65 ASSERT(WTF::isASCIILower(*p)); 66 ASSERT(propertyName.length()); 67#endif 68 69 if (WTF::toASCIILower(propertyName[0]) != prefix[0]) 70 return false; 71 72 unsigned length = propertyName.length(); 73 for (unsigned i = 1; i < length; ++i) { 74 if (!prefix[i]) 75 return WTF::isASCIIUpper(propertyName[i]); 76 if (propertyName[i] != prefix[i]) 77 return false; 78 } 79 return false; 80} 81 82class CSSPropertyInfo { 83public: 84 int propID; 85 bool hadPixelOrPosPrefix; 86 bool wasFilter; 87}; 88 89// When getting properties on CSSStyleDeclarations, the name used from 90// Javascript and the actual name of the property are not the same, so 91// we have to do the following translation. The translation turns upper 92// case characters into lower case characters and inserts dashes to 93// separate words. 94// 95// Example: 'backgroundPositionY' -> 'background-position-y' 96// 97// Also, certain prefixes such as 'pos', 'css-' and 'pixel-' are stripped 98// and the hadPixelOrPosPrefix out parameter is used to indicate whether or 99// not the property name was prefixed with 'pos-' or 'pixel-'. 100static CSSPropertyInfo* cssPropertyInfo(v8::Handle<v8::String>v8PropertyName) 101{ 102 String propertyName = toWebCoreString(v8PropertyName); 103 typedef HashMap<String, CSSPropertyInfo*> CSSPropertyInfoMap; 104 DEFINE_STATIC_LOCAL(CSSPropertyInfoMap, map, ()); 105 CSSPropertyInfo* propInfo = map.get(propertyName); 106 if (!propInfo) { 107 unsigned length = propertyName.length(); 108 bool hadPixelOrPosPrefix = false; 109 if (!length) 110 return 0; 111 112 StringBuilder builder; 113 builder.reserveCapacity(length); 114 115 unsigned i = 0; 116 117 if (hasCSSPropertyNamePrefix(propertyName, "css")) 118 i += 3; 119 else if (hasCSSPropertyNamePrefix(propertyName, "pixel")) { 120 i += 5; 121 hadPixelOrPosPrefix = true; 122 } else if (hasCSSPropertyNamePrefix(propertyName, "pos")) { 123 i += 3; 124 hadPixelOrPosPrefix = true; 125 } else if (hasCSSPropertyNamePrefix(propertyName, "webkit") 126 || hasCSSPropertyNamePrefix(propertyName, "khtml") 127 || hasCSSPropertyNamePrefix(propertyName, "apple")) 128 builder.append('-'); 129 else if (WTF::isASCIIUpper(propertyName[0])) 130 return 0; 131 132 builder.append(WTF::toASCIILower(propertyName[i++])); 133 134 for (; i < length; ++i) { 135 UChar c = propertyName[i]; 136 if (!WTF::isASCIIUpper(c)) 137 builder.append(c); 138 else 139 builder.append(makeString('-', toASCIILower(c))); 140 } 141 142 String propName = builder.toString(); 143 int propertyID = cssPropertyID(propName); 144 if (propertyID) { 145 propInfo = new CSSPropertyInfo(); 146 propInfo->hadPixelOrPosPrefix = hadPixelOrPosPrefix; 147 propInfo->wasFilter = (propName == "filter"); 148 propInfo->propID = propertyID; 149 map.add(propertyName, propInfo); 150 } 151 } 152 return propInfo; 153} 154 155v8::Handle<v8::Value> V8CSSStyleDeclaration::namedPropertyGetter(v8::Local<v8::String> name, const v8::AccessorInfo& info) 156{ 157 INC_STATS("DOM.CSSStyleDeclaration.NamedPropertyGetter"); 158 // First look for API defined attributes on the style declaration object. 159 if (info.Holder()->HasRealNamedCallbackProperty(name)) 160 return notHandledByInterceptor(); 161 162 // Search the style declaration. 163 CSSStyleDeclaration* imp = V8CSSStyleDeclaration::toNative(info.Holder()); 164 CSSPropertyInfo* propInfo = cssPropertyInfo(name); 165 166 // Do not handle non-property names. 167 if (!propInfo) 168 return notHandledByInterceptor(); 169 170 171 RefPtr<CSSValue> cssValue = imp->getPropertyCSSValue(propInfo->propID); 172 if (cssValue) { 173 if (propInfo->hadPixelOrPosPrefix && 174 cssValue->cssValueType() == CSSValue::CSS_PRIMITIVE_VALUE) { 175 return v8::Number::New(static_cast<CSSPrimitiveValue*>( 176 cssValue.get())->getFloatValue(CSSPrimitiveValue::CSS_PX)); 177 } 178 return v8StringOrNull(cssValue->cssText()); 179 } 180 181 String result = imp->getPropertyValue(propInfo->propID); 182 if (result.isNull()) 183 result = ""; // convert null to empty string. 184 185 // The 'filter' attribute is made undetectable in KJS/WebKit 186 // to avoid confusion with IE's filter extension. 187 if (propInfo->wasFilter) 188 return v8UndetectableString(result); 189 190 return v8String(result); 191} 192 193v8::Handle<v8::Value> V8CSSStyleDeclaration::namedPropertySetter(v8::Local<v8::String> name, v8::Local<v8::Value> value, const v8::AccessorInfo& info) 194{ 195 INC_STATS("DOM.CSSStyleDeclaration.NamedPropertySetter"); 196 CSSStyleDeclaration* imp = V8CSSStyleDeclaration::toNative(info.Holder()); 197 CSSPropertyInfo* propInfo = cssPropertyInfo(name); 198 if (!propInfo) 199 return notHandledByInterceptor(); 200 201 String propertyValue = toWebCoreStringWithNullCheck(value); 202 if (propInfo->hadPixelOrPosPrefix) 203 propertyValue.append("px"); 204 205 ExceptionCode ec = 0; 206 int importantIndex = propertyValue.find("!important", 0, false); 207 bool important = false; 208 if (importantIndex != -1) { 209 important = true; 210 propertyValue = propertyValue.left(importantIndex - 1); 211 } 212 imp->setProperty(propInfo->propID, propertyValue, important, ec); 213 214 if (ec) 215 throwError(ec); 216 217 return value; 218} 219 220} // namespace WebCore 221