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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 #include "platform/fonts/FontDescription.h"
     39 
     40 namespace blink {
     41 
     42 // Note that we assume the parser only allows valid CSSValue types.
     43 
     44 class StyleBuilderConverter {
     45 public:
     46     static PassRefPtr<StyleReflection> convertBoxReflect(StyleResolverState&, CSSValue*);
     47     static AtomicString convertFragmentIdentifier(StyleResolverState&, CSSValue*);
     48     static Color convertColor(StyleResolverState&, CSSValue*, bool forVisitedLink = false);
     49     template <typename T> static T convertComputedLength(StyleResolverState&, CSSValue*);
     50     static LengthBox convertClip(StyleResolverState&, CSSValue*);
     51     template <typename T> static T convertFlags(StyleResolverState&, CSSValue*);
     52     static PassRefPtr<FontFeatureSettings> convertFontFeatureSettings(StyleResolverState&, CSSValue*);
     53     static FontDescription::Size convertFontSize(StyleResolverState&, CSSValue*);
     54     static FontWeight convertFontWeight(StyleResolverState&, CSSValue*);
     55     static FontDescription::VariantLigatures convertFontVariantLigatures(StyleResolverState&, CSSValue*);
     56     static EGlyphOrientation convertGlyphOrientation(StyleResolverState&, CSSValue*);
     57     static GridPosition convertGridPosition(StyleResolverState&, CSSValue*);
     58     static GridTrackSize convertGridTrackSize(StyleResolverState&, CSSValue*);
     59     template <typename T> static T convertLineWidth(StyleResolverState&, CSSValue*);
     60     static Length convertLength(StyleResolverState&, CSSValue*);
     61     static Length convertLengthOrAuto(StyleResolverState&, CSSValue*);
     62     static Length convertLengthSizing(StyleResolverState&, CSSValue*);
     63     static Length convertLengthMaxSizing(StyleResolverState&, CSSValue*);
     64     static LengthPoint convertLengthPoint(StyleResolverState&, CSSValue*);
     65     static LineBoxContain convertLineBoxContain(StyleResolverState&, CSSValue*);
     66     static float convertNumberOrPercentage(StyleResolverState&, CSSValue*);
     67     static PassRefPtr<QuotesData> convertQuotes(StyleResolverState&, CSSValue*);
     68     static LengthSize convertRadius(StyleResolverState&, CSSValue*);
     69     static EPaintOrder convertPaintOrder(StyleResolverState&, CSSValue*);
     70     static PassRefPtr<ShadowList> convertShadow(StyleResolverState&, CSSValue*);
     71     static float convertSpacing(StyleResolverState&, CSSValue*);
     72     template <CSSValueID IdForNone> static AtomicString convertString(StyleResolverState&, CSSValue*);
     73     static PassRefPtr<SVGLengthList> convertStrokeDasharray(StyleResolverState&, CSSValue*);
     74     static StyleColor convertStyleColor(StyleResolverState&, CSSValue*, bool forVisitedLink = false);
     75     static Color convertSVGColor(StyleResolverState&, CSSValue*);
     76     static PassRefPtr<SVGLength> convertSVGLength(StyleResolverState&, CSSValue*);
     77     static float convertTextStrokeWidth(StyleResolverState&, CSSValue*);
     78 
     79     static bool convertGridTrackList(CSSValue*, Vector<GridTrackSize>&, NamedGridLinesMap&, OrderedNamedGridLines&, StyleResolverState&);
     80     static void createImplicitNamedGridLinesFromGridArea(const NamedGridAreaMap&, NamedGridLinesMap&, GridTrackSizingDirection);
     81 };
     82 
     83 template <typename T>
     84 T StyleBuilderConverter::convertComputedLength(StyleResolverState& state, CSSValue* value)
     85 {
     86     return toCSSPrimitiveValue(value)->computeLength<T>(state.cssToLengthConversionData());
     87 }
     88 
     89 template <typename T>
     90 T StyleBuilderConverter::convertFlags(StyleResolverState& state, CSSValue* value)
     91 {
     92     T flags = static_cast<T>(0);
     93     for (CSSValueListIterator i(value); i.hasMore(); i.advance())
     94         flags |= *toCSSPrimitiveValue(i.value());
     95     return flags;
     96 }
     97 
     98 template <typename T>
     99 T StyleBuilderConverter::convertLineWidth(StyleResolverState& state, CSSValue* value)
    100 {
    101     CSSPrimitiveValue* primitiveValue = toCSSPrimitiveValue(value);
    102     CSSValueID valueID = primitiveValue->getValueID();
    103     if (valueID == CSSValueThin)
    104         return 1;
    105     if (valueID == CSSValueMedium)
    106         return 3;
    107     if (valueID == CSSValueThick)
    108         return 5;
    109     if (valueID == CSSValueInvalid) {
    110         // Any original result that was >= 1 should not be allowed to fall below 1.
    111         // This keeps border lines from vanishing.
    112         T result = primitiveValue->computeLength<T>(state.cssToLengthConversionData());
    113         if (state.style()->effectiveZoom() < 1.0f && result < 1.0) {
    114             T originalLength = primitiveValue->computeLength<T>(state.cssToLengthConversionData().copyWithAdjustedZoom(1.0));
    115             if (originalLength >= 1.0)
    116                 return 1.0;
    117         }
    118         return result;
    119     }
    120     ASSERT_NOT_REACHED();
    121     return 0;
    122 }
    123 
    124 template <CSSValueID IdForNone>
    125 AtomicString StyleBuilderConverter::convertString(StyleResolverState&, CSSValue* value)
    126 {
    127     CSSPrimitiveValue* primitiveValue = toCSSPrimitiveValue(value);
    128     if (primitiveValue->getValueID() == IdForNone)
    129         return nullAtom;
    130     return AtomicString(primitiveValue->getStringValue());
    131 }
    132 
    133 } // namespace blink
    134 
    135 #endif
    136