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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 "WebKitCSSMatrix.h"
     28 
     29 #include "CSSParser.h"
     30 #include "CSSStyleSelector.h"
     31 #include "CSSMutableStyleDeclaration.h"
     32 #include "CSSPropertyNames.h"
     33 #include "CSSValueKeywords.h"
     34 #include "ExceptionCode.h"
     35 #include <wtf/MathExtras.h>
     36 
     37 namespace WebCore {
     38 
     39 WebKitCSSMatrix::WebKitCSSMatrix(const TransformationMatrix& m)
     40     : m_matrix(m)
     41 {
     42 }
     43 
     44 WebKitCSSMatrix::WebKitCSSMatrix(const String& s, ExceptionCode& ec)
     45 {
     46     setMatrixValue(s, ec);
     47 }
     48 
     49 WebKitCSSMatrix::~WebKitCSSMatrix()
     50 {
     51 }
     52 
     53 void WebKitCSSMatrix::setMatrixValue(const String& string, ExceptionCode& ec)
     54 {
     55     RefPtr<CSSMutableStyleDeclaration> styleDeclaration = CSSMutableStyleDeclaration::create();
     56     if (CSSParser::parseValue(styleDeclaration.get(), CSSPropertyWebkitTransform, string, true, true)) {
     57         // Convert to TransformOperations. This can fail if a property
     58         // requires style (i.e., param uses 'ems' or 'exs')
     59         RefPtr<CSSValue> value = styleDeclaration->getPropertyCSSValue(CSSPropertyWebkitTransform);
     60 
     61         // Check for a "none" or empty transform. In these cases we can use the default identity matrix.
     62         if (!value || (value->isPrimitiveValue() && (static_cast<CSSPrimitiveValue*>(value.get()))->getIdent() == CSSValueNone))
     63             return;
     64 
     65         TransformOperations operations;
     66         if (!CSSStyleSelector::createTransformOperations(value.get(), 0, 0, operations)) {
     67             ec = SYNTAX_ERR;
     68             return;
     69         }
     70 
     71         // Convert transform operations to a TransformationMatrix. This can fail
     72         // if a param has a percentage ('%')
     73         TransformationMatrix t;
     74         for (unsigned i = 0; i < operations.operations().size(); ++i) {
     75             if (operations.operations()[i].get()->apply(t, IntSize(0, 0))) {
     76                 ec = SYNTAX_ERR;
     77                 return;
     78             }
     79         }
     80 
     81         // set the matrix
     82         m_matrix = t;
     83     } else if (!string.isEmpty()) // There is something there but parsing failed
     84         ec = SYNTAX_ERR;
     85 }
     86 
     87 // Perform a concatenation of the matrices (this * secondMatrix)
     88 PassRefPtr<WebKitCSSMatrix> WebKitCSSMatrix::multiply(WebKitCSSMatrix* secondMatrix) const
     89 {
     90     if (!secondMatrix)
     91         return 0;
     92 
     93     return WebKitCSSMatrix::create(TransformationMatrix(m_matrix).multiply(secondMatrix->m_matrix));
     94 }
     95 
     96 PassRefPtr<WebKitCSSMatrix> WebKitCSSMatrix::inverse(ExceptionCode& ec) const
     97 {
     98     if (!m_matrix.isInvertible()) {
     99         ec = NOT_SUPPORTED_ERR;
    100         return 0;
    101     }
    102 
    103     return WebKitCSSMatrix::create(m_matrix.inverse());
    104 }
    105 
    106 PassRefPtr<WebKitCSSMatrix> WebKitCSSMatrix::translate(double x, double y, double z) const
    107 {
    108     if (isnan(x))
    109         x = 0;
    110     if (isnan(y))
    111         y = 0;
    112     if (isnan(z))
    113         z = 0;
    114     return WebKitCSSMatrix::create(TransformationMatrix(m_matrix).translate3d(x, y, z));
    115 }
    116 
    117 PassRefPtr<WebKitCSSMatrix> WebKitCSSMatrix::scale(double scaleX, double scaleY, double scaleZ) const
    118 {
    119     if (isnan(scaleX))
    120         scaleX = 1;
    121     if (isnan(scaleY))
    122         scaleY = scaleX;
    123     if (isnan(scaleZ))
    124         scaleZ = 1;
    125     return WebKitCSSMatrix::create(TransformationMatrix(m_matrix).scale3d(scaleX, scaleY, scaleZ));
    126 }
    127 
    128 PassRefPtr<WebKitCSSMatrix> WebKitCSSMatrix::rotate(double rotX, double rotY, double rotZ) const
    129 {
    130     if (isnan(rotX))
    131         rotX = 0;
    132 
    133     if (isnan(rotY) && isnan(rotZ)) {
    134         rotZ = rotX;
    135         rotX = 0;
    136         rotY = 0;
    137     }
    138 
    139     if (isnan(rotY))
    140         rotY = 0;
    141     if (isnan(rotZ))
    142         rotZ = 0;
    143     return WebKitCSSMatrix::create(TransformationMatrix(m_matrix).rotate3d(rotX, rotY, rotZ));
    144 }
    145 
    146 PassRefPtr<WebKitCSSMatrix> WebKitCSSMatrix::rotateAxisAngle(double x, double y, double z, double angle) const
    147 {
    148     if (isnan(x))
    149         x = 0;
    150     if (isnan(y))
    151         y = 0;
    152     if (isnan(z))
    153         z = 0;
    154     if (isnan(angle))
    155         angle = 0;
    156     if (x == 0 && y == 0 && z == 0)
    157         z = 1;
    158     return WebKitCSSMatrix::create(TransformationMatrix(m_matrix).rotate3d(x, y, z, angle));
    159 }
    160 
    161 PassRefPtr<WebKitCSSMatrix> WebKitCSSMatrix::skewX(double angle) const
    162 {
    163     if (isnan(angle))
    164         angle = 0;
    165     return WebKitCSSMatrix::create(TransformationMatrix(m_matrix).skewX(angle));
    166 }
    167 
    168 PassRefPtr<WebKitCSSMatrix> WebKitCSSMatrix::skewY(double angle) const
    169 {
    170     if (isnan(angle))
    171         angle = 0;
    172     return WebKitCSSMatrix::create(TransformationMatrix(m_matrix).skewY(angle));
    173 }
    174 
    175 String WebKitCSSMatrix::toString() const
    176 {
    177     // FIXME - Need to ensure valid CSS floating point values (https://bugs.webkit.org/show_bug.cgi?id=20674)
    178     if (m_matrix.isAffine())
    179         return String::format("matrix(%f, %f, %f, %f, %f, %f)",
    180                                 m_matrix.a(), m_matrix.b(), m_matrix.c(), m_matrix.d(), m_matrix.e(), m_matrix.f());
    181     return String::format("matrix3d(%f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f)",
    182                             m_matrix.m11(), m_matrix.m12(), m_matrix.m13(), m_matrix.m14(),
    183                             m_matrix.m21(), m_matrix.m22(), m_matrix.m23(), m_matrix.m24(),
    184                             m_matrix.m31(), m_matrix.m32(), m_matrix.m33(), m_matrix.m34(),
    185                             m_matrix.m41(), m_matrix.m42(), m_matrix.m43(), m_matrix.m44());
    186 }
    187 
    188 } // namespace WebCore
    189