Home | History | Annotate | Download | only in css 
      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 "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 // Returns an empty list if the property is not a shorthand, otherwise the list of longhands for parsing.
     90 const StylePropertyShorthand& parsingShorthandForProperty(CSSPropertyID propertyID)
     91 {
     92     switch (propertyID) {
     93     case CSSPropertyAnimation:
     94         return animationShorthandForParsing();
     95     case CSSPropertyBorder:
     96         return borderShorthandForParsing();
     97     case CSSPropertyWebkitAnimation:
     98         return webkitAnimationShorthandForParsing();
     99     default:
    100         return shorthandForProperty(propertyID);
    101     }
    102 }
    103 
    104 bool isExpandedShorthand(CSSPropertyID id)
    105 {
    106     // The system fonts bypass the normal style resolution by using RenderTheme,
    107     // thus we need to special case it here. FIXME: This is a violation of CSS 3 Fonts
    108     // as we should still be able to change the longhands.
    109     // DON'T ADD ANY SHORTHAND HERE UNLESS IT ISN'T ALWAYS EXPANDED AT PARSE TIME (which is wrong).
    110     if (id == CSSPropertyFont)
    111         return false;
    112 
    113     return shorthandForProperty(id).length();
    114 }
    115 
    116 unsigned indexOfShorthandForLonghand(CSSPropertyID shorthandID, const Vector<StylePropertyShorthand, 4>& shorthands)
    117 {
    118     for (unsigned i = 0; i < shorthands.size(); ++i) {
    119         if (shorthands.at(i).id() == shorthandID)
    120             return i;
    121     }
    122     ASSERT_NOT_REACHED();
    123     return 0;
    124 }
    125 
    126 } // namespace WebCore
    127