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      1 /*
      2  * (C) 1999-2003 Lars Knoll (knoll (at) kde.org)
      3  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
      4  * Copyright (C) 2013 Intel Corporation. All rights reserved.
      5  *
      6  * This library is free software; you can redistribute it and/or
      7  * modify it under the terms of the GNU Library General Public
      8  * License as published by the Free Software Foundation; either
      9  * version 2 of the License, or (at your option) any later version.
     10  *
     11  * This library is distributed in the hope that it will be useful,
     12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     14  * Library General Public License for more details.
     15  *
     16  * You should have received a copy of the GNU Library General Public License
     17  * along with this library; see the file COPYING.LIB.  If not, write to
     18  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     19  * Boston, MA 02110-1301, USA.
     20  */
     21 
     22 #include "config.h"
     23 #include "core/StylePropertyShorthand.h"
     24 
     25 namespace WebCore {
     26 
     27 const StylePropertyShorthand& borderShorthandForParsing()
     28 {
     29     static const CSSPropertyID borderShorthandProperties[] = { CSSPropertyBorderWidth, CSSPropertyBorderStyle, CSSPropertyBorderColor };
     30     static const StylePropertyShorthand* propertiesForInitialization[] = {
     31         &borderWidthShorthand(),
     32         &borderStyleShorthand(),
     33         &borderColorShorthand(),
     34     };
     35     DEFINE_STATIC_LOCAL(StylePropertyShorthand, borderForParsingLonghands, (CSSPropertyBorder, borderShorthandProperties, propertiesForInitialization, WTF_ARRAY_LENGTH(borderShorthandProperties)));
     36     return borderForParsingLonghands;
     37 }
     38 
     39 const StylePropertyShorthand& animationShorthandForParsing()
     40 {
     41     // When we parse the animation shorthand we need to look for animation-name
     42     // last because otherwise it might match against the keywords for fill mode,
     43     // timing functions and infinite iteration. This means that animation names
     44     // that are the same as keywords (e.g. 'forwards') won't always match in the
     45     // shorthand. In that case the authors should be using longhands (or
     46     // reconsidering their approach). This is covered by the animations spec
     47     // bug: https://www.w3.org/Bugs/Public/show_bug.cgi?id=14790
     48     // And in the spec (editor's draft) at:
     49     // http://dev.w3.org/csswg/css3-animations/#animation-shorthand-property
     50     static const CSSPropertyID animationPropertiesForParsing[] = {
     51         CSSPropertyAnimationDuration,
     52         CSSPropertyAnimationTimingFunction,
     53         CSSPropertyAnimationDelay,
     54         CSSPropertyAnimationIterationCount,
     55         CSSPropertyAnimationDirection,
     56         CSSPropertyAnimationFillMode,
     57         CSSPropertyAnimationPlayState,
     58         CSSPropertyAnimationName
     59     };
     60     DEFINE_STATIC_LOCAL(StylePropertyShorthand, webkitAnimationLonghandsForParsing, (CSSPropertyAnimation, animationPropertiesForParsing, WTF_ARRAY_LENGTH(animationPropertiesForParsing)));
     61     return webkitAnimationLonghandsForParsing;
     62 }
     63 
     64 const StylePropertyShorthand& webkitAnimationShorthandForParsing()
     65 {
     66     // When we parse the animation shorthand we need to look for animation-name
     67     // last because otherwise it might match against the keywords for fill mode,
     68     // timing functions and infinite iteration. This means that animation names
     69     // that are the same as keywords (e.g. 'forwards') won't always match in the
     70     // shorthand. In that case the authors should be using longhands (or
     71     // reconsidering their approach). This is covered by the animations spec
     72     // bug: https://www.w3.org/Bugs/Public/show_bug.cgi?id=14790
     73     // And in the spec (editor's draft) at:
     74     // http://dev.w3.org/csswg/css3-animations/#animation-shorthand-property
     75     static const CSSPropertyID animationPropertiesForParsing[] = {
     76         CSSPropertyWebkitAnimationDuration,
     77         CSSPropertyWebkitAnimationTimingFunction,
     78         CSSPropertyWebkitAnimationDelay,
     79         CSSPropertyWebkitAnimationIterationCount,
     80         CSSPropertyWebkitAnimationDirection,
     81         CSSPropertyWebkitAnimationFillMode,
     82         CSSPropertyWebkitAnimationPlayState,
     83         CSSPropertyWebkitAnimationName
     84     };
     85     DEFINE_STATIC_LOCAL(StylePropertyShorthand, webkitAnimationLonghandsForParsing, (CSSPropertyWebkitAnimation, animationPropertiesForParsing, WTF_ARRAY_LENGTH(animationPropertiesForParsing)));
     86     return webkitAnimationLonghandsForParsing;
     87 }
     88 
     89 // Similar to animations, we have property after timing-function and delay after duration
     90 const StylePropertyShorthand& transitionShorthandForParsing()
     91 {
     92     static const CSSPropertyID transitionProperties[] = {
     93         CSSPropertyTransitionDuration,
     94         CSSPropertyTransitionTimingFunction,
     95         CSSPropertyTransitionDelay,
     96         CSSPropertyTransitionProperty
     97     };
     98     DEFINE_STATIC_LOCAL(StylePropertyShorthand, transitionLonghands, (CSSPropertyTransition, transitionProperties, WTF_ARRAY_LENGTH(transitionProperties)));
     99     return transitionLonghands;
    100 }
    101 
    102 const StylePropertyShorthand& webkitTransitionShorthandForParsing()
    103 {
    104     static const CSSPropertyID webkitTransitionProperties[] = {
    105         CSSPropertyWebkitTransitionDuration,
    106         CSSPropertyWebkitTransitionTimingFunction,
    107         CSSPropertyWebkitTransitionDelay,
    108         CSSPropertyWebkitTransitionProperty
    109     };
    110     DEFINE_STATIC_LOCAL(StylePropertyShorthand, webkitTransitionLonghands, (CSSPropertyWebkitTransition, webkitTransitionProperties, WTF_ARRAY_LENGTH(webkitTransitionProperties)));
    111     return webkitTransitionLonghands;
    112 }
    113 
    114 // Returns an empty list if the property is not a shorthand, otherwise the list of longhands for parsing.
    115 const StylePropertyShorthand& parsingShorthandForProperty(CSSPropertyID propertyID)
    116 {
    117     switch (propertyID) {
    118     case CSSPropertyAnimation:
    119         return animationShorthandForParsing();
    120     case CSSPropertyBorder:
    121         return borderShorthandForParsing();
    122     case CSSPropertyWebkitAnimation:
    123         return webkitAnimationShorthandForParsing();
    124     case CSSPropertyTransition:
    125         return transitionShorthandForParsing();
    126     case CSSPropertyWebkitTransition:
    127         return webkitTransitionShorthandForParsing();
    128     default:
    129         return shorthandForProperty(propertyID);
    130     }
    131 }
    132 
    133 bool isExpandedShorthand(CSSPropertyID id)
    134 {
    135     // The system fonts bypass the normal style resolution by using RenderTheme,
    136     // thus we need to special case it here. FIXME: This is a violation of CSS 3 Fonts
    137     // as we should still be able to change the longhands.
    138     // DON'T ADD ANY SHORTHAND HERE UNLESS IT ISN'T ALWAYS EXPANDED AT PARSE TIME (which is wrong).
    139     if (id == CSSPropertyFont)
    140         return false;
    141 
    142     return shorthandForProperty(id).length();
    143 }
    144 
    145 bool isExpandedShorthandForAll(CSSPropertyID propertyId)
    146 {
    147     // FIXME: isExpandedShorthand says "font" is not an expanded shorthand,
    148     // but font is expanded to font-family, font-size, and so on.
    149     // StylePropertySerializer::asText should not generate css text like
    150     // "font: initial; font-family: initial;...". To avoid this, we need to
    151     // treat "font" as an expanded shorthand.
    152     // And while applying "all" property, we cannot apply "font" property
    153     // directly. This causes ASSERT crash, because StyleBuilder assume that
    154     // all given properties are not expanded shorthands.
    155     // "marker" has the same issue.
    156     if (propertyId == CSSPropertyMarker || propertyId == CSSPropertyFont)
    157         return true;
    158     return shorthandForProperty(propertyId).length();
    159 }
    160 
    161 unsigned indexOfShorthandForLonghand(CSSPropertyID shorthandID, const Vector<StylePropertyShorthand, 4>& shorthands)
    162 {
    163     for (unsigned i = 0; i < shorthands.size(); ++i) {
    164         if (shorthands.at(i).id() == shorthandID)
    165             return i;
    166     }
    167     ASSERT_NOT_REACHED();
    168     return 0;
    169 }
    170 
    171 } // namespace WebCore
    172