WebKitCSSMatrix.cpp revision 2fc2651226baac27029e38c9d6ef883fa32084db 
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
37namespace WebCore {
38
39WebKitCSSMatrix::WebKitCSSMatrix(const TransformationMatrix& m)
40    : m_matrix(m)
41{
42}
43
44WebKitCSSMatrix::WebKitCSSMatrix(const String& s, ExceptionCode& ec)
45{
46    setMatrixValue(s, ec);
47}
48
49WebKitCSSMatrix::~WebKitCSSMatrix()
50{
51}
52
53void WebKitCSSMatrix::setMatrixValue(const String& string, ExceptionCode& ec)
54{
55    CSSParser p(true);
56    RefPtr<CSSMutableStyleDeclaration> styleDeclaration = CSSMutableStyleDeclaration::create();
57    if (p.parseValue(styleDeclaration.get(), CSSPropertyWebkitTransform, string, true)) {
58        // Convert to TransformOperations. This can fail if a property
59        // requires style (i.e., param uses 'ems' or 'exs')
60        RefPtr<CSSValue> value = styleDeclaration->getPropertyCSSValue(CSSPropertyWebkitTransform);
61
62        // Check for a "none" or empty transform. In these cases we can use the default identity matrix.
63        if (!value || (value->isPrimitiveValue() && (static_cast<CSSPrimitiveValue*>(value.get()))->getIdent() == CSSValueNone))
64            return;
65
66        TransformOperations operations;
67        if (!CSSStyleSelector::createTransformOperations(value.get(), 0, 0, operations)) {
68            ec = SYNTAX_ERR;
69            return;
70        }
71
72        // Convert transform operations to a TransformationMatrix. This can fail
73        // if a param has a percentage ('%')
74        TransformationMatrix t;
75        for (unsigned i = 0; i < operations.operations().size(); ++i) {
76            if (operations.operations()[i].get()->apply(t, IntSize(0, 0))) {
77                ec = SYNTAX_ERR;
78                return;
79            }
80        }
81
82        // set the matrix
83        m_matrix = t;
84    } else if (!string.isEmpty()) // There is something there but parsing failed
85        ec = SYNTAX_ERR;
86}
87
88// Perform a concatenation of the matrices (this * secondMatrix)
89PassRefPtr<WebKitCSSMatrix> WebKitCSSMatrix::multiply(WebKitCSSMatrix* secondMatrix) const
90{
91    if (!secondMatrix)
92        return 0;
93
94    return WebKitCSSMatrix::create(TransformationMatrix(m_matrix).multiply(secondMatrix->m_matrix));
95}
96
97PassRefPtr<WebKitCSSMatrix> WebKitCSSMatrix::inverse(ExceptionCode& ec) const
98{
99    if (!m_matrix.isInvertible()) {
100        ec = NOT_SUPPORTED_ERR;
101        return 0;
102    }
103
104    return WebKitCSSMatrix::create(m_matrix.inverse());
105}
106
107PassRefPtr<WebKitCSSMatrix> WebKitCSSMatrix::translate(double x, double y, double z) const
108{
109    if (isnan(x))
110        x = 0;
111    if (isnan(y))
112        y = 0;
113    if (isnan(z))
114        z = 0;
115    return WebKitCSSMatrix::create(TransformationMatrix(m_matrix).translate3d(x, y, z));
116}
117
118PassRefPtr<WebKitCSSMatrix> WebKitCSSMatrix::scale(double scaleX, double scaleY, double scaleZ) const
119{
120    if (isnan(scaleX))
121        scaleX = 1;
122    if (isnan(scaleY))
123        scaleY = scaleX;
124    if (isnan(scaleZ))
125        scaleZ = 1;
126    return WebKitCSSMatrix::create(TransformationMatrix(m_matrix).scale3d(scaleX, scaleY, scaleZ));
127}
128
129PassRefPtr<WebKitCSSMatrix> WebKitCSSMatrix::rotate(double rotX, double rotY, double rotZ) const
130{
131    if (isnan(rotX))
132        rotX = 0;
133
134    if (isnan(rotY) && isnan(rotZ)) {
135        rotZ = rotX;
136        rotX = 0;
137        rotY = 0;
138    }
139
140    if (isnan(rotY))
141        rotY = 0;
142    if (isnan(rotZ))
143        rotZ = 0;
144    return WebKitCSSMatrix::create(TransformationMatrix(m_matrix).rotate3d(rotX, rotY, rotZ));
145}
146
147PassRefPtr<WebKitCSSMatrix> WebKitCSSMatrix::rotateAxisAngle(double x, double y, double z, double angle) const
148{
149    if (isnan(x))
150        x = 0;
151    if (isnan(y))
152        y = 0;
153    if (isnan(z))
154        z = 0;
155    if (isnan(angle))
156        angle = 0;
157    if (x == 0 && y == 0 && z == 0)
158        z = 1;
159    return WebKitCSSMatrix::create(TransformationMatrix(m_matrix).rotate3d(x, y, z, angle));
160}
161
162PassRefPtr<WebKitCSSMatrix> WebKitCSSMatrix::skewX(double angle) const
163{
164    if (isnan(angle))
165        angle = 0;
166    return WebKitCSSMatrix::create(TransformationMatrix(m_matrix).skewX(angle));
167}
168
169PassRefPtr<WebKitCSSMatrix> WebKitCSSMatrix::skewY(double angle) const
170{
171    if (isnan(angle))
172        angle = 0;
173    return WebKitCSSMatrix::create(TransformationMatrix(m_matrix).skewY(angle));
174}
175
176String WebKitCSSMatrix::toString() const
177{
178    // FIXME - Need to ensure valid CSS floating point values (https://bugs.webkit.org/show_bug.cgi?id=20674)
179    if (m_matrix.isAffine())
180        return String::format("matrix(%f, %f, %f, %f, %f, %f)",
181                                m_matrix.a(), m_matrix.b(), m_matrix.c(), m_matrix.d(), m_matrix.e(), m_matrix.f());
182    return String::format("matrix3d(%f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f)",
183                            m_matrix.m11(), m_matrix.m12(), m_matrix.m13(), m_matrix.m14(),
184                            m_matrix.m21(), m_matrix.m22(), m_matrix.m23(), m_matrix.m24(),
185                            m_matrix.m31(), m_matrix.m32(), m_matrix.m33(), m_matrix.m34(),
186                            m_matrix.m41(), m_matrix.m42(), m_matrix.m43(), m_matrix.m44());
187}
188
189} // namespace WebCore
190