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      1 /*
      2  * Copyright (C) 2013 Adobe Systems Incorporated. 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  *
      8  * 1. Redistributions of source code must retain the above
      9  *    copyright notice, this list of conditions and the following
     10  *    disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above
     12  *    copyright notice, this list of conditions and the following
     13  *    disclaimer in the documentation and/or other materials
     14  *    provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     17  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     18  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
     19  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
     20  * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
     21  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     22  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     23  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
     25  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     26  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
     27  * OF THE POSSIBILITY OF SUCH DAMAGE.
     28  */
     29 
     30 #include "config.h"
     31 #include "core/css/RuntimeCSSEnabled.h"
     32 
     33 #include "platform/RuntimeEnabledFeatures.h"
     34 #include "wtf/BitArray.h"
     35 
     36 namespace WebCore {
     37 
     38 typedef BitArray<numCSSProperties> CSSPropertySwitches;
     39 
     40 static void setCSSPropertiesEnabled(CSSPropertyID* properties, size_t length, bool featureFlag)
     41 {
     42     for (size_t i = 0; i < length; i++)
     43         RuntimeCSSEnabled::setCSSPropertyEnabled(properties[i], featureFlag);
     44 }
     45 
     46 static void setPropertySwitchesFromRuntimeFeatures()
     47 {
     48     CSSPropertyID exclusionProperties[] = {
     49         CSSPropertyWebkitWrapFlow,
     50         CSSPropertyWebkitWrapThrough,
     51     };
     52     setCSSPropertiesEnabled(exclusionProperties, WTF_ARRAY_LENGTH(exclusionProperties), RuntimeEnabledFeatures::cssExclusionsEnabled());
     53     CSSPropertyID shapeProperties[] = {
     54         CSSPropertyShapeMargin,
     55         CSSPropertyShapeImageThreshold,
     56         CSSPropertyShapeOutside,
     57     };
     58     setCSSPropertiesEnabled(shapeProperties, WTF_ARRAY_LENGTH(shapeProperties), RuntimeEnabledFeatures::cssShapesEnabled());
     59     CSSPropertyID css3TextDecorationProperties[] = {
     60         CSSPropertyTextDecorationColor,
     61         CSSPropertyTextDecorationLine,
     62         CSSPropertyTextDecorationStyle,
     63         CSSPropertyTextUnderlinePosition,
     64     };
     65     setCSSPropertiesEnabled(css3TextDecorationProperties, WTF_ARRAY_LENGTH(css3TextDecorationProperties), RuntimeEnabledFeatures::css3TextDecorationsEnabled());
     66     CSSPropertyID css3TextProperties[] = {
     67         CSSPropertyTextAlignLast,
     68         CSSPropertyTextJustify,
     69     };
     70     setCSSPropertiesEnabled(css3TextProperties, WTF_ARRAY_LENGTH(css3TextProperties), RuntimeEnabledFeatures::css3TextEnabled());
     71     CSSPropertyID cssGridLayoutProperties[] = {
     72         CSSPropertyGridAutoColumns,
     73         CSSPropertyGridAutoRows,
     74         CSSPropertyGridTemplateColumns,
     75         CSSPropertyGridTemplateRows,
     76         CSSPropertyGridColumnStart,
     77         CSSPropertyGridColumnEnd,
     78         CSSPropertyGridRowStart,
     79         CSSPropertyGridRowEnd,
     80         CSSPropertyGridColumn,
     81         CSSPropertyGridRow,
     82         CSSPropertyGridArea,
     83         CSSPropertyGridAutoFlow,
     84         CSSPropertyGridTemplateAreas,
     85         CSSPropertyGridTemplate,
     86         CSSPropertyGrid,
     87         CSSPropertyJustifySelf
     88     };
     89     setCSSPropertiesEnabled(cssGridLayoutProperties, WTF_ARRAY_LENGTH(cssGridLayoutProperties), RuntimeEnabledFeatures::cssGridLayoutEnabled());
     90     CSSPropertyID cssObjectFitPositionProperties[] = {
     91         CSSPropertyObjectFit,
     92         CSSPropertyObjectPosition
     93     };
     94     setCSSPropertiesEnabled(cssObjectFitPositionProperties, WTF_ARRAY_LENGTH(cssObjectFitPositionProperties), RuntimeEnabledFeatures::objectFitPositionEnabled());
     95 
     96     CSSPropertyID animationProperties[] = {
     97         CSSPropertyAnimation,
     98         CSSPropertyAnimationName,
     99         CSSPropertyAnimationDuration,
    100         CSSPropertyAnimationTimingFunction,
    101         CSSPropertyAnimationDelay,
    102         CSSPropertyAnimationIterationCount,
    103         CSSPropertyAnimationDirection,
    104         CSSPropertyAnimationFillMode,
    105         CSSPropertyAnimationPlayState
    106     };
    107     setCSSPropertiesEnabled(animationProperties, WTF_ARRAY_LENGTH(animationProperties), RuntimeEnabledFeatures::cssAnimationUnprefixedEnabled());
    108 
    109     CSSPropertyID transformProperties[] = {
    110         CSSPropertyBackfaceVisibility,
    111         CSSPropertyPerspective,
    112         CSSPropertyPerspectiveOrigin,
    113         CSSPropertyTransform,
    114         CSSPropertyTransformOrigin,
    115         CSSPropertyTransformStyle
    116     };
    117     setCSSPropertiesEnabled(transformProperties, WTF_ARRAY_LENGTH(transformProperties), RuntimeEnabledFeatures::cssTransformsUnprefixedEnabled());
    118 
    119     RuntimeCSSEnabled::setCSSPropertyEnabled(CSSPropertyMixBlendMode, RuntimeEnabledFeatures::cssCompositingEnabled());
    120     RuntimeCSSEnabled::setCSSPropertyEnabled(CSSPropertyIsolation, RuntimeEnabledFeatures::cssCompositingEnabled());
    121     RuntimeCSSEnabled::setCSSPropertyEnabled(CSSPropertyTouchAction, RuntimeEnabledFeatures::cssTouchActionEnabled());
    122     RuntimeCSSEnabled::setCSSPropertyEnabled(CSSPropertyTouchActionDelay, RuntimeEnabledFeatures::cssTouchActionDelayEnabled());
    123     RuntimeCSSEnabled::setCSSPropertyEnabled(CSSPropertyMaskSourceType, RuntimeEnabledFeatures::cssMaskSourceTypeEnabled());
    124     RuntimeCSSEnabled::setCSSPropertyEnabled(CSSPropertyColumnFill, RuntimeEnabledFeatures::regionBasedColumnsEnabled());
    125     RuntimeCSSEnabled::setCSSPropertyEnabled(CSSPropertyScrollBehavior, RuntimeEnabledFeatures::cssomSmoothScrollEnabled());
    126     RuntimeCSSEnabled::setCSSPropertyEnabled(CSSPropertyWillChange, RuntimeEnabledFeatures::cssWillChangeEnabled());
    127 
    128     // InternalCallback is an implementation detail, rather than an experimental feature, and should never be exposed to the web.
    129     RuntimeCSSEnabled::setCSSPropertyEnabled(CSSPropertyInternalCallback, false);
    130 }
    131 
    132 static CSSPropertySwitches& propertySwitches()
    133 {
    134     static CSSPropertySwitches* switches = 0;
    135     if (!switches) {
    136         switches = new CSSPropertySwitches(true); // All bits sets to 1.
    137         setPropertySwitchesFromRuntimeFeatures();
    138     }
    139     return *switches;
    140 }
    141 
    142 size_t indexForProperty(CSSPropertyID propertyId)
    143 {
    144     RELEASE_ASSERT(propertyId >= firstCSSProperty && propertyId <= lastCSSProperty);
    145     // Values all start at 0. BitArray ASSERTS will catch if we're ever wrong.
    146     return static_cast<size_t>(propertyId - firstCSSProperty);
    147 }
    148 
    149 bool RuntimeCSSEnabled::isCSSPropertyEnabled(CSSPropertyID propertyId)
    150 {
    151     // Internal properties shouldn't be exposed to the web
    152     // so they are considered to be always disabled.
    153     if (isInternalProperty(propertyId))
    154         return false;
    155 
    156     return propertySwitches().get(indexForProperty(propertyId));
    157 }
    158 
    159 void RuntimeCSSEnabled::setCSSPropertyEnabled(CSSPropertyID propertyId, bool enable)
    160 {
    161     size_t propertyIndex = indexForProperty(propertyId);
    162     if (enable)
    163         propertySwitches().set(propertyIndex);
    164     else
    165         propertySwitches().clear(propertyIndex);
    166 }
    167 
    168 void RuntimeCSSEnabled::filterEnabledCSSPropertiesIntoVector(const CSSPropertyID* properties, size_t propertyCount, Vector<CSSPropertyID>& outVector)
    169 {
    170     for (unsigned i = 0; i < propertyCount; i++) {
    171         CSSPropertyID property = properties[i];
    172         if (RuntimeCSSEnabled::isCSSPropertyEnabled(property))
    173             outVector.append(property);
    174     }
    175 }
    176 
    177 } // namespace WebCore
    178