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 "bindings/core/v8/V8CSSStyleDeclaration.h"
33
34 #include "bindings/core/v8/ExceptionState.h"
35 #include "bindings/core/v8/V8Binding.h"
36 #include "core/CSSPropertyNames.h"
37 #include "core/css/CSSPrimitiveValue.h"
38 #include "core/css/CSSPropertyMetadata.h"
39 #include "core/css/CSSStyleDeclaration.h"
40 #include "core/css/CSSValue.h"
41 #include "core/css/parser/CSSParser.h"
42 #include "core/events/EventTarget.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
51 using namespace WTF;
52
53 namespace blink {
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.
hasCSSPropertyNamePrefix(const String & propertyName,const char * prefix)60 static bool hasCSSPropertyNamePrefix(const String& propertyName, const char* prefix)
61 {
62 #if ENABLE(ASSERT)
63 ASSERT(*prefix);
64 for (const char* p = prefix; *p; ++p)
65 ASSERT(isASCIILower(*p));
66 ASSERT(propertyName.length());
67 #endif
68
69 if (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 isASCIIUpper(propertyName[i]);
76 if (propertyName[i] != prefix[i])
77 return false;
78 }
79 return false;
80 }
81
82 struct CSSPropertyInfo {
83 CSSPropertyID propID;
84 };
85
cssResolvedPropertyID(const String & propertyName)86 static CSSPropertyID cssResolvedPropertyID(const String& propertyName)
87 {
88 unsigned length = propertyName.length();
89 if (!length)
90 return CSSPropertyInvalid;
91
92 StringBuilder builder;
93 builder.reserveCapacity(length);
94
95 unsigned i = 0;
96 bool hasSeenDash = false;
97
98 if (hasCSSPropertyNamePrefix(propertyName, "css"))
99 i += 3;
100 else if (hasCSSPropertyNamePrefix(propertyName, "webkit"))
101 builder.append('-');
102 else if (isASCIIUpper(propertyName[0]))
103 return CSSPropertyInvalid;
104
105 bool hasSeenUpper = isASCIIUpper(propertyName[i]);
106
107 builder.append(toASCIILower(propertyName[i++]));
108
109 for (; i < length; ++i) {
110 UChar c = propertyName[i];
111 if (!isASCIIUpper(c)) {
112 if (c == '-')
113 hasSeenDash = true;
114 builder.append(c);
115 } else {
116 hasSeenUpper = true;
117 builder.append('-');
118 builder.append(toASCIILower(c));
119 }
120 }
121
122 // Reject names containing both dashes and upper-case characters, such as "border-rightColor".
123 if (hasSeenDash && hasSeenUpper)
124 return CSSPropertyInvalid;
125
126 String propName = builder.toString();
127 return cssPropertyID(propName);
128 }
129
130 // When getting properties on CSSStyleDeclarations, the name used from
131 // Javascript and the actual name of the property are not the same, so
132 // we have to do the following translation. The translation turns upper
133 // case characters into lower case characters and inserts dashes to
134 // separate words.
135 //
136 // Example: 'backgroundPositionY' -> 'background-position-y'
137 //
138 // Also, certain prefixes such as 'css-' are stripped.
cssPropertyInfo(v8::Handle<v8::String> v8PropertyName)139 static CSSPropertyInfo* cssPropertyInfo(v8::Handle<v8::String> v8PropertyName)
140 {
141 String propertyName = toCoreString(v8PropertyName);
142 typedef HashMap<String, CSSPropertyInfo*> CSSPropertyInfoMap;
143 DEFINE_STATIC_LOCAL(CSSPropertyInfoMap, map, ());
144 CSSPropertyInfo* propInfo = map.get(propertyName);
145 if (!propInfo) {
146 propInfo = new CSSPropertyInfo();
147 propInfo->propID = cssResolvedPropertyID(propertyName);
148 map.add(propertyName, propInfo);
149 }
150 if (!propInfo->propID)
151 return 0;
152 ASSERT(CSSPropertyMetadata::isEnabledProperty(propInfo->propID));
153 return propInfo;
154 }
155
namedPropertyEnumeratorCustom(const v8::PropertyCallbackInfo<v8::Array> & info)156 void V8CSSStyleDeclaration::namedPropertyEnumeratorCustom(const v8::PropertyCallbackInfo<v8::Array>& info)
157 {
158 typedef Vector<String, numCSSProperties - 1> PreAllocatedPropertyVector;
159 DEFINE_STATIC_LOCAL(PreAllocatedPropertyVector, propertyNames, ());
160 static unsigned propertyNamesLength = 0;
161
162 if (propertyNames.isEmpty()) {
163 for (int id = firstCSSProperty; id <= lastCSSProperty; ++id) {
164 CSSPropertyID propertyId = static_cast<CSSPropertyID>(id);
165 if (CSSPropertyMetadata::isEnabledProperty(propertyId))
166 propertyNames.append(getJSPropertyName(propertyId));
167 }
168 std::sort(propertyNames.begin(), propertyNames.end(), codePointCompareLessThan);
169 propertyNamesLength = propertyNames.size();
170 }
171
172 v8::Handle<v8::Array> properties = v8::Array::New(info.GetIsolate(), propertyNamesLength);
173 for (unsigned i = 0; i < propertyNamesLength; ++i) {
174 String key = propertyNames.at(i);
175 ASSERT(!key.isNull());
176 properties->Set(v8::Integer::New(info.GetIsolate(), i), v8String(info.GetIsolate(), key));
177 }
178
179 v8SetReturnValue(info, properties);
180 }
181
namedPropertyQueryCustom(v8::Local<v8::String> v8Name,const v8::PropertyCallbackInfo<v8::Integer> & info)182 void V8CSSStyleDeclaration::namedPropertyQueryCustom(v8::Local<v8::String> v8Name, const v8::PropertyCallbackInfo<v8::Integer>& info)
183 {
184 // NOTE: cssPropertyInfo lookups incur several mallocs.
185 // Successful lookups have the same cost the first time, but are cached.
186 if (cssPropertyInfo(v8Name)) {
187 v8SetReturnValueInt(info, 0);
188 return;
189 }
190 }
191
namedPropertyGetterCustom(v8::Local<v8::String> name,const v8::PropertyCallbackInfo<v8::Value> & info)192 void V8CSSStyleDeclaration::namedPropertyGetterCustom(v8::Local<v8::String> name, const v8::PropertyCallbackInfo<v8::Value>& info)
193 {
194 // First look for API defined attributes on the style declaration object.
195 if (info.Holder()->HasRealNamedCallbackProperty(name))
196 return;
197
198 // Search the style declaration.
199 CSSPropertyInfo* propInfo = cssPropertyInfo(name);
200
201 // Do not handle non-property names.
202 if (!propInfo)
203 return;
204
205 CSSStyleDeclaration* impl = V8CSSStyleDeclaration::toImpl(info.Holder());
206 RefPtrWillBeRawPtr<CSSValue> cssValue = impl->getPropertyCSSValueInternal(static_cast<CSSPropertyID>(propInfo->propID));
207 if (cssValue) {
208 v8SetReturnValueStringOrNull(info, cssValue->cssText(), info.GetIsolate());
209 return;
210 }
211
212 String result = impl->getPropertyValueInternal(static_cast<CSSPropertyID>(propInfo->propID));
213 v8SetReturnValueString(info, result, info.GetIsolate());
214 }
215
namedPropertySetterCustom(v8::Local<v8::String> name,v8::Local<v8::Value> value,const v8::PropertyCallbackInfo<v8::Value> & info)216 void V8CSSStyleDeclaration::namedPropertySetterCustom(v8::Local<v8::String> name, v8::Local<v8::Value> value, const v8::PropertyCallbackInfo<v8::Value>& info)
217 {
218 CSSStyleDeclaration* impl = V8CSSStyleDeclaration::toImpl(info.Holder());
219 CSSPropertyInfo* propInfo = cssPropertyInfo(name);
220 if (!propInfo)
221 return;
222
223 TOSTRING_VOID(V8StringResource<TreatNullAsNullString>, propertyValue, value);
224 ExceptionState exceptionState(ExceptionState::SetterContext, getPropertyName(static_cast<CSSPropertyID>(propInfo->propID)), "CSSStyleDeclaration", info.Holder(), info.GetIsolate());
225 impl->setPropertyInternal(static_cast<CSSPropertyID>(propInfo->propID), propertyValue, false, exceptionState);
226
227 if (exceptionState.throwIfNeeded())
228 return;
229
230 v8SetReturnValue(info, value);
231 }
232
233 } // namespace blink
234