1/* 2 * Copyright (C) 2007-2011 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 "CSSPropertyNames.h" 35#include "bindings/v8/ExceptionState.h" 36#include "bindings/v8/V8Binding.h" 37#include "core/css/CSSParser.h" 38#include "core/css/CSSPrimitiveValue.h" 39#include "core/css/CSSStyleDeclaration.h" 40#include "core/css/CSSValue.h" 41#include "core/dom/EventTarget.h" 42#include "core/page/RuntimeCSSEnabled.h" 43#include "wtf/ASCIICType.h" 44#include "wtf/PassRefPtr.h" 45#include "wtf/RefPtr.h" 46#include "wtf/StdLibExtras.h" 47#include "wtf/Vector.h" 48#include "wtf/text/StringBuilder.h" 49#include "wtf/text/StringConcatenate.h" 50 51using namespace WTF; 52using namespace std; 53 54namespace WebCore { 55 56// FIXME: Next two functions look lifted verbatim from JSCSSStyleDeclarationCustom. Please remove duplication. 57 58// Check for a CSS prefix. 59// Passed prefix is all lowercase. 60// First character of the prefix within the property name may be upper or lowercase. 61// Other characters in the prefix within the property name must be lowercase. 62// The prefix within the property name must be followed by a capital letter. 63static bool hasCSSPropertyNamePrefix(const String& propertyName, const char* prefix) 64{ 65#ifndef NDEBUG 66 ASSERT(*prefix); 67 for (const char* p = prefix; *p; ++p) 68 ASSERT(isASCIILower(*p)); 69 ASSERT(propertyName.length()); 70#endif 71 72 if (toASCIILower(propertyName[0]) != prefix[0]) 73 return false; 74 75 unsigned length = propertyName.length(); 76 for (unsigned i = 1; i < length; ++i) { 77 if (!prefix[i]) 78 return isASCIIUpper(propertyName[i]); 79 if (propertyName[i] != prefix[i]) 80 return false; 81 } 82 return false; 83} 84 85class CSSPropertyInfo { 86public: 87 CSSPropertyID propID; 88}; 89 90// When getting properties on CSSStyleDeclarations, the name used from 91// Javascript and the actual name of the property are not the same, so 92// we have to do the following translation. The translation turns upper 93// case characters into lower case characters and inserts dashes to 94// separate words. 95// 96// Example: 'backgroundPositionY' -> 'background-position-y' 97// 98// Also, certain prefixes such as 'css-' are stripped. 99static CSSPropertyInfo* cssPropertyInfo(v8::Handle<v8::String> v8PropertyName) 100{ 101 String propertyName = toWebCoreString(v8PropertyName); 102 typedef HashMap<String, CSSPropertyInfo*> CSSPropertyInfoMap; 103 DEFINE_STATIC_LOCAL(CSSPropertyInfoMap, map, ()); 104 CSSPropertyInfo* propInfo = map.get(propertyName); 105 if (!propInfo) { 106 unsigned length = propertyName.length(); 107 if (!length) 108 return 0; 109 110 StringBuilder builder; 111 builder.reserveCapacity(length); 112 113 unsigned i = 0; 114 115 if (hasCSSPropertyNamePrefix(propertyName, "css")) 116 i += 3; 117 else if (hasCSSPropertyNamePrefix(propertyName, "webkit")) 118 builder.append('-'); 119 else if (isASCIIUpper(propertyName[0])) 120 return 0; 121 122 builder.append(toASCIILower(propertyName[i++])); 123 124 for (; i < length; ++i) { 125 UChar c = propertyName[i]; 126 if (!isASCIIUpper(c)) 127 builder.append(c); 128 else { 129 builder.append('-'); 130 builder.append(toASCIILower(c)); 131 } 132 } 133 134 String propName = builder.toString(); 135 CSSPropertyID propertyID = cssPropertyID(propName); 136 if (propertyID && RuntimeCSSEnabled::isCSSPropertyEnabled(propertyID)) { 137 propInfo = new CSSPropertyInfo(); 138 propInfo->propID = propertyID; 139 map.add(propertyName, propInfo); 140 } 141 } 142 return propInfo; 143} 144 145void V8CSSStyleDeclaration::namedPropertyEnumeratorCustom(const v8::PropertyCallbackInfo<v8::Array>& info) 146{ 147 typedef Vector<String, numCSSProperties - 1> PreAllocatedPropertyVector; 148 DEFINE_STATIC_LOCAL(PreAllocatedPropertyVector, propertyNames, ()); 149 static unsigned propertyNamesLength = 0; 150 151 if (propertyNames.isEmpty()) { 152 for (int id = firstCSSProperty; id <= lastCSSProperty; ++id) { 153 CSSPropertyID propertyId = static_cast<CSSPropertyID>(id); 154 if (RuntimeCSSEnabled::isCSSPropertyEnabled(propertyId)) 155 propertyNames.append(getJSPropertyName(propertyId)); 156 } 157 sort(propertyNames.begin(), propertyNames.end(), codePointCompareLessThan); 158 propertyNamesLength = propertyNames.size(); 159 } 160 161 v8::Handle<v8::Array> properties = v8::Array::New(propertyNamesLength); 162 for (unsigned i = 0; i < propertyNamesLength; ++i) { 163 String key = propertyNames.at(i); 164 ASSERT(!key.isNull()); 165 properties->Set(v8::Integer::New(i, info.GetIsolate()), v8String(key, info.GetIsolate())); 166 } 167 168 v8SetReturnValue(info, properties); 169} 170 171void V8CSSStyleDeclaration::namedPropertyQueryCustom(v8::Local<v8::String> v8Name, const v8::PropertyCallbackInfo<v8::Integer>& info) 172{ 173 // NOTE: cssPropertyInfo lookups incur several mallocs. 174 // Successful lookups have the same cost the first time, but are cached. 175 if (cssPropertyInfo(v8Name)) { 176 v8SetReturnValueInt(info, 0); 177 return; 178 } 179} 180 181void V8CSSStyleDeclaration::namedPropertyGetterCustom(v8::Local<v8::String> name, const v8::PropertyCallbackInfo<v8::Value>& info) 182{ 183 // First look for API defined attributes on the style declaration object. 184 if (info.Holder()->HasRealNamedCallbackProperty(name)) 185 return; 186 187 // Search the style declaration. 188 CSSPropertyInfo* propInfo = cssPropertyInfo(name); 189 190 // Do not handle non-property names. 191 if (!propInfo) 192 return; 193 194 CSSStyleDeclaration* imp = V8CSSStyleDeclaration::toNative(info.Holder()); 195 RefPtr<CSSValue> cssValue = imp->getPropertyCSSValueInternal(static_cast<CSSPropertyID>(propInfo->propID)); 196 if (cssValue) { 197 v8SetReturnValueStringOrNull(info, cssValue->cssText(), info.GetIsolate()); 198 return; 199 } 200 201 String result = imp->getPropertyValueInternal(static_cast<CSSPropertyID>(propInfo->propID)); 202 if (result.isNull()) 203 result = ""; // convert null to empty string. 204 205 v8SetReturnValueString(info, result, info.GetIsolate()); 206} 207 208void V8CSSStyleDeclaration::namedPropertySetterCustom(v8::Local<v8::String> name, v8::Local<v8::Value> value, const v8::PropertyCallbackInfo<v8::Value>& info) 209{ 210 CSSStyleDeclaration* imp = V8CSSStyleDeclaration::toNative(info.Holder()); 211 CSSPropertyInfo* propInfo = cssPropertyInfo(name); 212 if (!propInfo) 213 return; 214 215 String propertyValue = toWebCoreStringWithNullCheck(value); 216 217 ExceptionState es(info.GetIsolate()); 218 imp->setPropertyInternal(static_cast<CSSPropertyID>(propInfo->propID), propertyValue, false, es); 219 220 if (es.throwIfNeeded()) 221 return; 222 223 v8SetReturnValue(info, value); 224} 225 226} // namespace WebCore 227