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 "CSSStyleDeclaration.h"
33
34 #include "CSSParser.h"
35 #include "CSSValue.h"
36 #include "CSSPrimitiveValue.h"
37 #include "EventTarget.h"
38
39 #include "V8Binding.h"
40 #include "V8CustomBinding.h"
41 #include "V8Proxy.h"
42
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
49 namespace WebCore {
50
51 // FIXME: Next two functions look lifted verbatim from JSCSSStyleDeclarationCustom. Please remove duplication.
52
53 // Check for a CSS prefix.
54 // Passed prefix is all lowercase.
55 // First character of the prefix within the property name may be upper or lowercase.
56 // Other characters in the prefix within the property name must be lowercase.
57 // The prefix within the property name must be followed by a capital letter.
hasCSSPropertyNamePrefix(const String & propertyName,const char * prefix)58 static bool hasCSSPropertyNamePrefix(const String& propertyName, const char* prefix)
59 {
60 #ifndef NDEBUG
61 ASSERT(*prefix);
62 for (const char* p = prefix; *p; ++p)
63 ASSERT(WTF::isASCIILower(*p));
64 ASSERT(propertyName.length());
65 #endif
66
67 if (WTF::toASCIILower(propertyName[0]) != prefix[0])
68 return false;
69
70 unsigned length = propertyName.length();
71 for (unsigned i = 1; i < length; ++i) {
72 if (!prefix[i])
73 return WTF::isASCIIUpper(propertyName[i]);
74 if (propertyName[i] != prefix[i])
75 return false;
76 }
77 return false;
78 }
79
80 class CSSPropertyInfo {
81 public:
82 int propID;
83 bool hadPixelOrPosPrefix;
84 bool wasFilter;
85 };
86
87 // When getting properties on CSSStyleDeclarations, the name used from
88 // Javascript and the actual name of the property are not the same, so
89 // we have to do the following translation. The translation turns upper
90 // case characters into lower case characters and inserts dashes to
91 // separate words.
92 //
93 // Example: 'backgroundPositionY' -> 'background-position-y'
94 //
95 // Also, certain prefixes such as 'pos', 'css-' and 'pixel-' are stripped
96 // and the hadPixelOrPosPrefix out parameter is used to indicate whether or
97 // not the property name was prefixed with 'pos-' or 'pixel-'.
cssPropertyInfo(v8::Handle<v8::String> v8PropertyName)98 static CSSPropertyInfo* cssPropertyInfo(v8::Handle<v8::String>v8PropertyName)
99 {
100 String propertyName = toWebCoreString(v8PropertyName);
101 typedef HashMap<String, CSSPropertyInfo*> CSSPropertyInfoMap;
102 DEFINE_STATIC_LOCAL(CSSPropertyInfoMap, map, ());
103 CSSPropertyInfo* propInfo = map.get(propertyName);
104 if (!propInfo) {
105 unsigned length = propertyName.length();
106 bool hadPixelOrPosPrefix = false;
107 if (!length)
108 return 0;
109
110 Vector<UChar> name;
111 name.reserveCapacity(length);
112
113 unsigned i = 0;
114
115 if (hasCSSPropertyNamePrefix(propertyName, "css"))
116 i += 3;
117 else if (hasCSSPropertyNamePrefix(propertyName, "pixel")) {
118 i += 5;
119 hadPixelOrPosPrefix = true;
120 } else if (hasCSSPropertyNamePrefix(propertyName, "pos")) {
121 i += 3;
122 hadPixelOrPosPrefix = true;
123 } else if (hasCSSPropertyNamePrefix(propertyName, "webkit")
124 || hasCSSPropertyNamePrefix(propertyName, "khtml")
125 || hasCSSPropertyNamePrefix(propertyName, "apple"))
126 name.append('-');
127 else if (WTF::isASCIIUpper(propertyName[0]))
128 return 0;
129
130 name.append(WTF::toASCIILower(propertyName[i++]));
131
132 for (; i < length; ++i) {
133 UChar c = propertyName[i];
134 if (!WTF::isASCIIUpper(c))
135 name.append(c);
136 else {
137 name.append('-');
138 name.append(WTF::toASCIILower(c));
139 }
140 }
141
142 String propName = String::adopt(name);
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
NAMED_PROPERTY_GETTER(CSSStyleDeclaration)155 NAMED_PROPERTY_GETTER(CSSStyleDeclaration)
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 =
164 V8DOMWrapper::convertToNativeObject<CSSStyleDeclaration>(V8ClassIndex::CSSSTYLEDECLARATION, info.Holder());
165 CSSPropertyInfo* propInfo = cssPropertyInfo(name);
166
167 // Do not handle non-property names.
168 if (!propInfo)
169 return notHandledByInterceptor();
170
171
172 RefPtr<CSSValue> cssValue = imp->getPropertyCSSValue(propInfo->propID);
173 if (cssValue) {
174 if (propInfo->hadPixelOrPosPrefix &&
175 cssValue->cssValueType() == CSSValue::CSS_PRIMITIVE_VALUE) {
176 return v8::Number::New(static_cast<CSSPrimitiveValue*>(
177 cssValue.get())->getFloatValue(CSSPrimitiveValue::CSS_PX));
178 }
179 return v8StringOrNull(cssValue->cssText());
180 }
181
182 String result = imp->getPropertyValue(propInfo->propID);
183 if (result.isNull())
184 result = ""; // convert null to empty string.
185
186 // The 'filter' attribute is made undetectable in KJS/WebKit
187 // to avoid confusion with IE's filter extension.
188 if (propInfo->wasFilter)
189 return v8UndetectableString(result);
190
191 return v8String(result);
192 }
193
NAMED_PROPERTY_SETTER(CSSStyleDeclaration)194 NAMED_PROPERTY_SETTER(CSSStyleDeclaration)
195 {
196 INC_STATS("DOM.CSSStyleDeclaration.NamedPropertySetter");
197 CSSStyleDeclaration* imp =
198 V8DOMWrapper::convertToNativeObject<CSSStyleDeclaration>(
199 V8ClassIndex::CSSSTYLEDECLARATION, info.Holder());
200 CSSPropertyInfo* propInfo = cssPropertyInfo(name);
201 if (!propInfo)
202 return notHandledByInterceptor();
203
204 String propertyValue = toWebCoreStringWithNullCheck(value);
205 if (propInfo->hadPixelOrPosPrefix)
206 propertyValue.append("px");
207
208 ExceptionCode ec = 0;
209 int importantIndex = propertyValue.find("!important", 0, false);
210 bool important = false;
211 if (importantIndex != -1) {
212 important = true;
213 propertyValue = propertyValue.left(importantIndex - 1);
214 }
215 imp->setProperty(propInfo->propID, propertyValue, important, ec);
216
217 if (ec)
218 throwError(ec);
219
220 return value;
221 }
222
223 } // namespace WebCore
224