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      1 /*
      2  * Copyright (C) 2013 Google Inc. All rights reserved.
      3  *
      4  *     * Redistributions of source code must retain the above copyright
      5  * notice, this list of conditions and the following disclaimer.
      6  *     * Redistributions in binary form must reproduce the above
      7  * copyright notice, this list of conditions and the following disclaimer
      8  * in the documentation and/or other materials provided with the
      9  * distribution.
     10  *     * Neither the name of Google Inc. nor the names of its
     11  * contributors may be used to endorse or promote products derived from
     12  * this software without specific prior written permission.
     13  *
     14  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     15  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     16  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     17  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     18  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     19  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     20  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     24  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     25  */
     26 
     27 #ifndef StyleBuilderConverter_h
     28 #define StyleBuilderConverter_h
     29 
     30 #include "core/css/CSSValue.h"
     31 #include "core/css/resolver/StyleResolverState.h"
     32 #include "core/rendering/RenderView.h"
     33 #include "core/rendering/style/QuotesData.h"
     34 #include "core/rendering/style/ShadowList.h"
     35 #include "core/rendering/style/StyleReflection.h"
     36 #include "core/svg/SVGLength.h"
     37 #include "platform/LengthSize.h"
     38 
     39 namespace WebCore {
     40 
     41 // Note that we assume the parser only allows valid CSSValue types.
     42 
     43 class StyleBuilderConverter {
     44 public:
     45     static PassRefPtr<StyleReflection> convertBoxReflect(StyleResolverState&, CSSValue*);
     46     static AtomicString convertFragmentIdentifier(StyleResolverState&, CSSValue*);
     47     template <typename T> static T convertComputedLength(StyleResolverState&, CSSValue*);
     48     static EGlyphOrientation convertGlyphOrientation(StyleResolverState&, CSSValue*);
     49     static GridPosition convertGridPosition(StyleResolverState&, CSSValue*);
     50     static GridTrackSize convertGridTrackSize(StyleResolverState&, CSSValue*);
     51     template <typename T> static T convertLineWidth(StyleResolverState&, CSSValue*);
     52     static Length convertLength(StyleResolverState&, CSSValue*);
     53     static Length convertLengthOrAuto(StyleResolverState&, CSSValue*);
     54     static Length convertLengthSizing(StyleResolverState&, CSSValue*);
     55     static Length convertLengthMaxSizing(StyleResolverState&, CSSValue*);
     56     static LengthPoint convertLengthPoint(StyleResolverState&, CSSValue*);
     57     static LineBoxContain convertLineBoxContain(StyleResolverState&, CSSValue*);
     58     static float convertNumberOrPercentage(StyleResolverState&, CSSValue*);
     59     static PassRefPtr<QuotesData> convertQuotes(StyleResolverState&, CSSValue*);
     60     static LengthSize convertRadius(StyleResolverState&, CSSValue*);
     61     static EPaintOrder convertPaintOrder(StyleResolverState&, CSSValue*);
     62     static PassRefPtr<ShadowList> convertShadow(StyleResolverState&, CSSValue*);
     63     static float convertSpacing(StyleResolverState&, CSSValue*);
     64     template <CSSValueID IdForNone> static AtomicString convertString(StyleResolverState&, CSSValue*);
     65     static PassRefPtr<SVGLengthList> convertStrokeDasharray(StyleResolverState&, CSSValue*);
     66     static Color convertSVGColor(StyleResolverState&, CSSValue*);
     67     static PassRefPtr<SVGLength> convertSVGLength(StyleResolverState&, CSSValue*);
     68     static float convertTextStrokeWidth(StyleResolverState&, CSSValue*);
     69 
     70     static bool convertGridTrackList(CSSValue*, Vector<GridTrackSize>&, NamedGridLinesMap&, OrderedNamedGridLines&, StyleResolverState&);
     71     static void createImplicitNamedGridLinesFromGridArea(const NamedGridAreaMap&, NamedGridLinesMap&, GridTrackSizingDirection);
     72 };
     73 
     74 template <typename T>
     75 T StyleBuilderConverter::convertComputedLength(StyleResolverState& state, CSSValue* value)
     76 {
     77     return toCSSPrimitiveValue(value)->computeLength<T>(state.cssToLengthConversionData());
     78 }
     79 
     80 template <typename T>
     81 T StyleBuilderConverter::convertLineWidth(StyleResolverState& state, CSSValue* value)
     82 {
     83     CSSPrimitiveValue* primitiveValue = toCSSPrimitiveValue(value);
     84     CSSValueID valueID = primitiveValue->getValueID();
     85     if (valueID == CSSValueThin)
     86         return 1;
     87     if (valueID == CSSValueMedium)
     88         return 3;
     89     if (valueID == CSSValueThick)
     90         return 5;
     91     if (valueID == CSSValueInvalid) {
     92         // Any original result that was >= 1 should not be allowed to fall below 1.
     93         // This keeps border lines from vanishing.
     94         T result = primitiveValue->computeLength<T>(state.cssToLengthConversionData());
     95         if (state.style()->effectiveZoom() < 1.0f && result < 1.0) {
     96             T originalLength = primitiveValue->computeLength<T>(state.cssToLengthConversionData().copyWithAdjustedZoom(1.0));
     97             if (originalLength >= 1.0)
     98                 return 1.0;
     99         }
    100         return result;
    101     }
    102     ASSERT_NOT_REACHED();
    103     return 0;
    104 }
    105 
    106 template <CSSValueID IdForNone>
    107 AtomicString StyleBuilderConverter::convertString(StyleResolverState&, CSSValue* value)
    108 {
    109     CSSPrimitiveValue* primitiveValue = toCSSPrimitiveValue(value);
    110     if (primitiveValue->getValueID() == IdForNone)
    111         return nullAtom;
    112     return AtomicString(primitiveValue->getStringValue());
    113 }
    114 
    115 } // namespace WebCore
    116 
    117 #endif
    118