1/*
2 * Copyright (C) 2007, 2008, 2009 Apple 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
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "JSCSSStyleDeclarationCustom.h"
28
29#include "AtomicString.h"
30#include "CSSMutableStyleDeclaration.h"
31#include "CSSPrimitiveValue.h"
32#include "CSSValue.h"
33#include "PlatformString.h"
34#include <runtime/StringObjectThatMasqueradesAsUndefined.h>
35#include <runtime/StringPrototype.h>
36#include <wtf/ASCIICType.h>
37
38using namespace JSC;
39using namespace WTF;
40
41namespace WebCore {
42
43void JSCSSStyleDeclaration::markChildren(MarkStack& markStack)
44{
45    Base::markChildren(markStack);
46
47    CSSStyleDeclaration* declaration = impl();
48    JSGlobalData& globalData = *Heap::heap(this)->globalData();
49
50    if (declaration->isMutableStyleDeclaration()) {
51        CSSMutableStyleDeclaration* mutableDeclaration = static_cast<CSSMutableStyleDeclaration*>(declaration);
52        CSSMutableStyleDeclaration::const_iterator end = mutableDeclaration->end();
53        for (CSSMutableStyleDeclaration::const_iterator it = mutableDeclaration->begin(); it != end; ++it)
54            markDOMObjectWrapper(markStack, globalData, it->value());
55    }
56}
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 Identifier& 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.size());
70#endif
71
72    if (toASCIILower(propertyName.data()[0]) != prefix[0])
73        return false;
74
75    unsigned length = propertyName.size();
76    for (unsigned i = 1; i < length; ++i) {
77        if (!prefix[i])
78            return isASCIIUpper(propertyName.data()[i]);
79        if (propertyName.data()[i] != prefix[i])
80            return false;
81    }
82    return false;
83}
84
85static String cssPropertyName(const Identifier& propertyName, bool* hadPixelOrPosPrefix = 0)
86{
87    if (hadPixelOrPosPrefix)
88        *hadPixelOrPosPrefix = false;
89
90    unsigned length = propertyName.size();
91    if (!length)
92        return String();
93
94    Vector<UChar> name;
95    name.reserveInitialCapacity(length);
96
97    unsigned i = 0;
98
99    if (hasCSSPropertyNamePrefix(propertyName, "css"))
100        i += 3;
101    else if (hasCSSPropertyNamePrefix(propertyName, "pixel")) {
102        i += 5;
103        if (hadPixelOrPosPrefix)
104            *hadPixelOrPosPrefix = true;
105    } else if (hasCSSPropertyNamePrefix(propertyName, "pos")) {
106        i += 3;
107        if (hadPixelOrPosPrefix)
108            *hadPixelOrPosPrefix = true;
109    } else if (hasCSSPropertyNamePrefix(propertyName, "webkit")
110            || hasCSSPropertyNamePrefix(propertyName, "khtml")
111            || hasCSSPropertyNamePrefix(propertyName, "apple"))
112        name.append('-');
113    else {
114        if (isASCIIUpper(propertyName.data()[0]))
115            return String();
116    }
117
118    name.append(toASCIILower(propertyName.data()[i++]));
119
120    for (; i < length; ++i) {
121        UChar c = propertyName.data()[i];
122        if (!isASCIIUpper(c))
123            name.append(c);
124        else {
125            name.append('-');
126            name.append(toASCIILower(c));
127        }
128    }
129
130    return String::adopt(name);
131}
132
133static bool isCSSPropertyName(const Identifier& propertyName)
134{
135    return CSSStyleDeclaration::isPropertyName(cssPropertyName(propertyName));
136}
137
138bool JSCSSStyleDeclaration::canGetItemsForName(ExecState*, CSSStyleDeclaration*, const Identifier& propertyName)
139{
140    return isCSSPropertyName(propertyName);
141}
142
143// FIXME: You can get these properties, and set them (see putDelegate below),
144// but you should also be able to enumerate them.
145JSValue JSCSSStyleDeclaration::nameGetter(ExecState* exec, const Identifier& propertyName, const PropertySlot& slot)
146{
147    JSCSSStyleDeclaration* thisObj = static_cast<JSCSSStyleDeclaration*>(asObject(slot.slotBase()));
148
149    // Set up pixelOrPos boolean to handle the fact that
150    // pixelTop returns "CSS Top" as number value in unit pixels
151    // posTop returns "CSS top" as number value in unit pixels _if_ its a
152    // positioned element. if it is not a positioned element, return 0
153    // from MSIE documentation FIXME: IMPLEMENT THAT (Dirk)
154    bool pixelOrPos;
155    String prop = cssPropertyName(propertyName, &pixelOrPos);
156    RefPtr<CSSValue> v = thisObj->impl()->getPropertyCSSValue(prop);
157    if (v) {
158        if (pixelOrPos && v->cssValueType() == CSSValue::CSS_PRIMITIVE_VALUE)
159            return jsNumber(exec, static_pointer_cast<CSSPrimitiveValue>(v)->getFloatValue(CSSPrimitiveValue::CSS_PX));
160        return jsStringOrNull(exec, v->cssText());
161    }
162
163    // If the property is a shorthand property (such as "padding"),
164    // it can only be accessed using getPropertyValue.
165
166    // Make the SVG 'filter' attribute undetectable, to avoid confusion with the IE 'filter' attribute.
167    if (propertyName == "filter")
168        return StringObjectThatMasqueradesAsUndefined::create(exec, thisObj->impl()->getPropertyValue(prop));
169
170    return jsString(exec, thisObj->impl()->getPropertyValue(prop));
171}
172
173
174bool JSCSSStyleDeclaration::putDelegate(ExecState* exec, const Identifier& propertyName, JSValue value, PutPropertySlot&)
175{
176    if (!isCSSPropertyName(propertyName))
177        return false;
178
179    bool pixelOrPos;
180    String prop = cssPropertyName(propertyName, &pixelOrPos);
181    String propValue = valueToStringWithNullCheck(exec, value);
182    if (pixelOrPos)
183        propValue += "px";
184    ExceptionCode ec = 0;
185    impl()->setProperty(prop, propValue, ec);
186    setDOMException(exec, ec);
187    return true;
188}
189
190} // namespace WebCore
191