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      1 /*
      2  * Copyright (C) 2008 Apple Inc. 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  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #include "config.h"
     27 #include "core/css/CSSMatrix.h"
     28 
     29 #include "CSSPropertyNames.h"
     30 #include "CSSValueKeywords.h"
     31 #include "bindings/v8/ExceptionState.h"
     32 #include "core/css/CSSParser.h"
     33 #include "core/css/StylePropertySet.h"
     34 #include "core/css/resolver/TransformBuilder.h"
     35 #include "core/dom/ExceptionCode.h"
     36 #include "wtf/MathExtras.h"
     37 
     38 namespace WebCore {
     39 
     40 CSSMatrix::CSSMatrix(const TransformationMatrix& m)
     41     : m_matrix(m)
     42 {
     43     ScriptWrappable::init(this);
     44 }
     45 
     46 CSSMatrix::CSSMatrix(const String& s, ExceptionState& es)
     47 {
     48     ScriptWrappable::init(this);
     49     setMatrixValue(s, es);
     50 }
     51 
     52 CSSMatrix::~CSSMatrix()
     53 {
     54 }
     55 
     56 void CSSMatrix::setMatrixValue(const String& string, ExceptionState& es)
     57 {
     58     if (string.isEmpty())
     59         return;
     60 
     61     RefPtr<MutableStylePropertySet> styleDeclaration = MutableStylePropertySet::create();
     62     if (CSSParser::parseValue(styleDeclaration.get(), CSSPropertyWebkitTransform, string, true, CSSStrictMode, 0)) {
     63         // Convert to TransformOperations. This can fail if a property
     64         // requires style (i.e., param uses 'ems' or 'exs')
     65         RefPtr<CSSValue> value = styleDeclaration->getPropertyCSSValue(CSSPropertyWebkitTransform);
     66 
     67         // Check for a "none" or empty transform. In these cases we can use the default identity matrix.
     68         if (!value || (value->isPrimitiveValue() && (toCSSPrimitiveValue(value.get()))->getValueID() == CSSValueNone))
     69             return;
     70 
     71         TransformOperations operations;
     72         if (!TransformBuilder::createTransformOperations(value.get(), 0, 0, operations)) {
     73             es.throwDOMException(SyntaxError);
     74             return;
     75         }
     76 
     77         // Convert transform operations to a TransformationMatrix. This can fail
     78         // if a param has a percentage ('%')
     79         TransformationMatrix t;
     80         for (unsigned i = 0; i < operations.operations().size(); ++i) {
     81             if (operations.operations()[i].get()->apply(t, IntSize(0, 0))) {
     82                 es.throwDOMException(SyntaxError);
     83                 return;
     84             }
     85         }
     86 
     87         // set the matrix
     88         m_matrix = t;
     89     } else { // There is something there but parsing failed.
     90         es.throwDOMException(SyntaxError);
     91     }
     92 }
     93 
     94 // Perform a concatenation of the matrices (this * secondMatrix)
     95 PassRefPtr<CSSMatrix> CSSMatrix::multiply(CSSMatrix* secondMatrix) const
     96 {
     97     if (!secondMatrix)
     98         return 0;
     99 
    100     return CSSMatrix::create(TransformationMatrix(m_matrix).multiply(secondMatrix->m_matrix));
    101 }
    102 
    103 PassRefPtr<CSSMatrix> CSSMatrix::inverse(ExceptionState& es) const
    104 {
    105     if (!m_matrix.isInvertible()) {
    106         es.throwDOMException(NotSupportedError);
    107         return 0;
    108     }
    109 
    110     return CSSMatrix::create(m_matrix.inverse());
    111 }
    112 
    113 PassRefPtr<CSSMatrix> CSSMatrix::translate(double x, double y, double z) const
    114 {
    115     if (std::isnan(x))
    116         x = 0;
    117     if (std::isnan(y))
    118         y = 0;
    119     if (std::isnan(z))
    120         z = 0;
    121     return CSSMatrix::create(TransformationMatrix(m_matrix).translate3d(x, y, z));
    122 }
    123 
    124 PassRefPtr<CSSMatrix> CSSMatrix::scale(double scaleX, double scaleY, double scaleZ) const
    125 {
    126     if (std::isnan(scaleX))
    127         scaleX = 1;
    128     if (std::isnan(scaleY))
    129         scaleY = scaleX;
    130     if (std::isnan(scaleZ))
    131         scaleZ = 1;
    132     return CSSMatrix::create(TransformationMatrix(m_matrix).scale3d(scaleX, scaleY, scaleZ));
    133 }
    134 
    135 PassRefPtr<CSSMatrix> CSSMatrix::rotate(double rotX, double rotY, double rotZ) const
    136 {
    137     if (std::isnan(rotX))
    138         rotX = 0;
    139 
    140     if (std::isnan(rotY) && std::isnan(rotZ)) {
    141         rotZ = rotX;
    142         rotX = 0;
    143         rotY = 0;
    144     }
    145 
    146     if (std::isnan(rotY))
    147         rotY = 0;
    148     if (std::isnan(rotZ))
    149         rotZ = 0;
    150     return CSSMatrix::create(TransformationMatrix(m_matrix).rotate3d(rotX, rotY, rotZ));
    151 }
    152 
    153 PassRefPtr<CSSMatrix> CSSMatrix::rotateAxisAngle(double x, double y, double z, double angle) const
    154 {
    155     if (std::isnan(x))
    156         x = 0;
    157     if (std::isnan(y))
    158         y = 0;
    159     if (std::isnan(z))
    160         z = 0;
    161     if (std::isnan(angle))
    162         angle = 0;
    163     if (!x && !y && !z)
    164         z = 1;
    165     return CSSMatrix::create(TransformationMatrix(m_matrix).rotate3d(x, y, z, angle));
    166 }
    167 
    168 PassRefPtr<CSSMatrix> CSSMatrix::skewX(double angle) const
    169 {
    170     if (std::isnan(angle))
    171         angle = 0;
    172     return CSSMatrix::create(TransformationMatrix(m_matrix).skewX(angle));
    173 }
    174 
    175 PassRefPtr<CSSMatrix> CSSMatrix::skewY(double angle) const
    176 {
    177     if (std::isnan(angle))
    178         angle = 0;
    179     return CSSMatrix::create(TransformationMatrix(m_matrix).skewY(angle));
    180 }
    181 
    182 String CSSMatrix::toString() const
    183 {
    184     // FIXME - Need to ensure valid CSS floating point values (https://bugs.webkit.org/show_bug.cgi?id=20674)
    185     if (m_matrix.isAffine())
    186         return String::format("matrix(%f, %f, %f, %f, %f, %f)", m_matrix.a(), m_matrix.b(), m_matrix.c(), m_matrix.d(), m_matrix.e(), m_matrix.f());
    187     return String::format("matrix3d(%f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f)",
    188     m_matrix.m11(), m_matrix.m12(), m_matrix.m13(), m_matrix.m14(),
    189     m_matrix.m21(), m_matrix.m22(), m_matrix.m23(), m_matrix.m24(),
    190     m_matrix.m31(), m_matrix.m32(), m_matrix.m33(), m_matrix.m34(),
    191     m_matrix.m41(), m_matrix.m42(), m_matrix.m43(), m_matrix.m44());
    192 }
    193 
    194 } // namespace WebCore
    195