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
WebKitCSSMatrix(const TransformationMatrix & m)39 WebKitCSSMatrix::WebKitCSSMatrix(const TransformationMatrix& m)
40 : m_matrix(m)
41 {
42 }
43
WebKitCSSMatrix(const String & s,ExceptionCode & ec)44 WebKitCSSMatrix::WebKitCSSMatrix(const String& s, ExceptionCode& ec)
45 {
46 setMatrixValue(s, ec);
47 }
48
~WebKitCSSMatrix()49 WebKitCSSMatrix::~WebKitCSSMatrix()
50 {
51 }
52
setMatrixValue(const String & string,ExceptionCode & ec)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)
multiply(WebKitCSSMatrix * secondMatrix) const88 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
inverse(ExceptionCode & ec) const96 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
translate(double x,double y,double z) const106 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
scale(double scaleX,double scaleY,double scaleZ) const117 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
rotate(double rotX,double rotY,double rotZ) const128 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
rotateAxisAngle(double x,double y,double z,double angle) const146 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
skewX(double angle) const161 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
skewY(double angle) const168 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
toString() const175 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