WebCore/css/CSSStyleDeclaration.cpp

   1 /*
   2  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
   3  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Library General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Library General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Library General Public License
  16  * along with this library; see the file COPYING.LIB.  If not, write to
  17  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  18  * Boston, MA 02110-1301, USA.
  19  */
  20
  21 #include "config.h"
  22 #include "CSSStyleDeclaration.h"
  23
  24 #include "CSSMutableStyleDeclaration.h"
  25 #include "CSSParser.h"
  26 #include "CSSProperty.h"
  27 #include "CSSPropertyNames.h"
  28 #include "CSSRule.h"
  29 #include <wtf/ASCIICType.h>
  30
  31 using namespace WTF;
  32
  33 namespace WebCore {
  34
  35 CSSStyleDeclaration::CSSStyleDeclaration(CSSRule* parent)
  36     : StyleBase(parent)
  37 {
  38 }
  39
  40 PassRefPtr<CSSValue> CSSStyleDeclaration::getPropertyCSSValue(const String& propertyName)
  41 {
  42     int propID = cssPropertyID(propertyName);
  43     if (!propID)
  44         return 0;
  45     return getPropertyCSSValue(propID);
  46 }
  47
  48 String CSSStyleDeclaration::getPropertyValue(const String &propertyName)
  49 {
  50     int propID = cssPropertyID(propertyName);
  51     if (!propID)
  52         return String();
  53     return getPropertyValue(propID);
  54 }
  55
  56 String CSSStyleDeclaration::getPropertyPriority(const String& propertyName)
  57 {
  58     int propID = cssPropertyID(propertyName);
  59     if (!propID)
  60         return String();
  61     return getPropertyPriority(propID) ? "important" : "";
  62 }
  63
  64 String CSSStyleDeclaration::getPropertyShorthand(const String& propertyName)
  65 {
  66     int propID = cssPropertyID(propertyName);
  67     if (!propID)
  68         return String();
  69     int shorthandID = getPropertyShorthand(propID);
  70     if (!shorthandID)
  71         return String();
  72     return getPropertyName(static_cast<CSSPropertyID>(shorthandID));
  73 }
  74
  75 bool CSSStyleDeclaration::isPropertyImplicit(const String& propertyName)
  76 {
  77     int propID = cssPropertyID(propertyName);
  78     if (!propID)
  79         return false;
  80     return isPropertyImplicit(propID);
  81 }
  82
  83 void CSSStyleDeclaration::setProperty(const String& propertyName, const String& value, ExceptionCode& ec)
  84 {
  85     int important = value.find("!important", 0, false);
  86     if (important == -1)
  87         setProperty(propertyName, value, "", ec);
  88     else
  89         setProperty(propertyName, value.left(important - 1), "important", ec);
  90 }
  91
  92 void CSSStyleDeclaration::setProperty(const String& propertyName, const String& value, const String& priority, ExceptionCode& ec)
  93 {
  94     int propID = cssPropertyID(propertyName);
  95     if (!propID) {
  96         // FIXME: Should we raise an exception here?
  97         return;
  98     }
  99     bool important = priority.find("important", 0, false) != -1;
 100     setProperty(propID, value, important, ec);
 101 }
 102
 103 String CSSStyleDeclaration::removeProperty(const String& propertyName, ExceptionCode& ec)
 104 {
 105     int propID = cssPropertyID(propertyName);
 106     if (!propID)
 107         return String();
 108     return removeProperty(propID, ec);
 109 }
 110
 111 bool CSSStyleDeclaration::isPropertyName(const String& propertyName)
 112 {
 113     return cssPropertyID(propertyName);
 114 }
 115
 116 CSSRule* CSSStyleDeclaration::parentRule() const
 117 {
 118     return (parent() && parent()->isRule()) ? static_cast<CSSRule*>(parent()) : 0;
 119 }
 120
 121 bool CSSStyleDeclaration::cssPropertyMatches(const CSSProperty* property) const
 122 {
 123     RefPtr<CSSValue> value = getPropertyCSSValue(property->id());
 124     return value && value->cssText() == property->value()->cssText();
 125 }
 126
 127 void CSSStyleDeclaration::diff(CSSMutableStyleDeclaration* style) const
 128 {
 129     if (!style)
 130         return;
 131
 132     Vector<int> propertiesToRemove;
 133     {
 134         CSSMutableStyleDeclaration::const_iterator end = style->end();
 135         for (CSSMutableStyleDeclaration::const_iterator it = style->begin(); it != end; ++it) {
 136             const CSSProperty& property = *it;
 137             if (cssPropertyMatches(&property))
 138                 propertiesToRemove.append(property.id());
 139         }
 140     }
 141
 142     // FIXME: This should use mass removal.
 143     for (unsigned i = 0; i < propertiesToRemove.size(); i++)
 144         style->removeProperty(propertiesToRemove[i]);
 145 }
 146
 147 PassRefPtr<CSSMutableStyleDeclaration> CSSStyleDeclaration::copyPropertiesInSet(const int* set, unsigned length) const
 148 {
 149     Vector<CSSProperty> list;
 150     list.reserveInitialCapacity(length);
 151     unsigned variableDependentValueCount = 0;
 152     for (unsigned i = 0; i < length; i++) {
 153         RefPtr<CSSValue> value = getPropertyCSSValue(set[i]);
 154         if (value) {
 155             if (value->isVariableDependentValue())
 156                 variableDependentValueCount++;
 157             list.append(CSSProperty(set[i], value.release(), false));
 158         }
 159     }
 160     return CSSMutableStyleDeclaration::create(list, variableDependentValueCount);
 161 }
 162
 163 } // namespace WebCore