Add support for disabling CSS Properties at runtime

Source/core/css/StylePropertySet.cpp

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2011 Research In Motion Limited. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 #include "config.h"
 #include "StylePropertySet.h"
 
+#include "core/page/RuntimeCSSEnabled.h"
 #include "CSSParser.h"
 #include "CSSValueKeywords.h"
 #include "CSSValueList.h"
 #include "CSSValuePool.h"
 #include "CSSVariableValue.h"
 #include "Document.h"
 #include "PropertySetCSSStyleDeclaration.h"
 #include "StylePropertyShorthand.h"
 #include "StyleSheetContents.h"
 #include <wtf/BitArray.h>
@@ skipping 1023 matching lines @@
     unsigned size = propertyCount();
     for (unsigned i = 0; i < size; ++i) {
         if (propertyAt(i).value()->hasFailedOrCanceledSubresources())
             return true;
     }
     return false;
 }
 
 // This is the list of properties we want to copy in the copyBlockProperties() function.
 // It is the list of CSS properties that apply specially to block-level elements.
-static const CSSPropertyID blockProperties[] = {
+static const CSSPropertyID staticBlockProperties[] = {
     CSSPropertyOrphans,
     CSSPropertyOverflow, // This can be also be applied to replaced elements
     CSSPropertyWebkitAspectRatio,
     CSSPropertyWebkitColumnCount,
     CSSPropertyWebkitColumnGap,
     CSSPropertyWebkitColumnRuleColor,
     CSSPropertyWebkitColumnRuleStyle,
     CSSPropertyWebkitColumnRuleWidth,
     CSSPropertyWebkitColumnBreakBefore,
     CSSPropertyWebkitColumnBreakAfter,
     CSSPropertyWebkitColumnBreakInside,
     CSSPropertyWebkitColumnWidth,
     CSSPropertyPageBreakAfter,
     CSSPropertyPageBreakBefore,
     CSSPropertyPageBreakInside,
 #if ENABLE(CSS_REGIONS)
     CSSPropertyWebkitRegionBreakAfter,
     CSSPropertyWebkitRegionBreakBefore,
     CSSPropertyWebkitRegionBreakInside,
 #endif
     CSSPropertyTextAlign,
 #if ENABLE(CSS3_TEXT)
     CSSPropertyWebkitTextAlignLast,
 #endif // CSS3_TEXT
     CSSPropertyTextIndent,
     CSSPropertyWidows
 };
 
+static const Vector<CSSPropertyID>& blockProperties()
+{
+    DEFINE_STATIC_LOCAL(Vector<CSSPropertyID>, properties, ());
+    if (properties.isEmpty())
+        RuntimeCSSEnabled::filterEnabledCSSPropertiesIntoVector(staticBlockProperties, WTF_ARRAY_LENGTH(staticBlockProperties), properties);
+    return properties;
+}
+
 void StylePropertySet::clear()
 {
     ASSERT(isMutable());
     mutablePropertyVector().clear();
 }
 
-const unsigned numBlockProperties = WTF_ARRAY_LENGTH(blockProperties);
-
 PassRefPtr<StylePropertySet> StylePropertySet::copyBlockProperties() const
 {
-    return copyPropertiesInSet(blockProperties, numBlockProperties);
+    return copyPropertiesInSet(blockProperties());
 }
 
 void StylePropertySet::removeBlockProperties()
 {
-    removePropertiesInSet(blockProperties, numBlockProperties);
+    removePropertiesInSet(blockProperties().data(), blockProperties().size());
 }
 
 bool StylePropertySet::removePropertiesInSet(const CSSPropertyID* set, unsigned length)
 {
     ASSERT(isMutable());
     if (mutablePropertyVector().isEmpty())
         return false;
 
     // FIXME: This is always used with static sets and in that case constructing the hash repeatedly is pretty pointless.
     HashSet<CSSPropertyID> toRemove;
@@ skipping 73 matching lines @@
     // FIXME: This should use mass removal.
     for (unsigned i = 0; i < propertiesToRemove.size(); ++i)
         removeProperty(propertiesToRemove[i]);
 }
 
 PassRefPtr<StylePropertySet> StylePropertySet::copy() const
 {
     return adoptRef(new MutableStylePropertySet(*this));
 }
 
-PassRefPtr<StylePropertySet> StylePropertySet::copyPropertiesInSet(const CSSPropertyID* set, unsigned length) const
+PassRefPtr<StylePropertySet> StylePropertySet::copyPropertiesInSet(const Vector<CSSPropertyID>& properties) const
 {
     Vector<CSSProperty, 256> list;
-    list.reserveInitialCapacity(length);
-    for (unsigned i = 0; i < length; ++i) {
-        RefPtr<CSSValue> value = getPropertyCSSValue(set[i]);
+    list.reserveInitialCapacity(properties.size());
+    for (unsigned i = 0; i < properties.size(); ++i) {
+        RefPtr<CSSValue> value = getPropertyCSSValue(properties[i]);
         if (value)
-            list.append(CSSProperty(set[i], value.release(), false));
+            list.append(CSSProperty(properties[i], value.release(), false));
     }
     return StylePropertySet::create(list.data(), list.size());
 }
 
 PropertySetCSSStyleDeclaration* StylePropertySet::cssStyleDeclaration()
 {
     if (!m_ownsCSSOMWrapper)
         return 0;
     ASSERT(isMutable());
     return propertySetCSSOMWrapperMap().get(this);
@@ skipping 87 matching lines @@
     result.appendLiteral(": ");
     result.append(propertyValue()->cssText());
     if (isImportant())
         result.appendLiteral(" !important");
     result.append(';');
     return result.toString();
 }
 
 
 } // namespace WebCore