1/*
2 * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
3 *           (C) 2000 Antti Koivisto (koivisto@kde.org)
4 *           (C) 2000 Dirk Mueller (mueller@kde.org)
5 * Copyright (C) 2003, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
6 * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
7 *
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
12 *
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16 * Library General Public License for more details.
17 *
18 * You should have received a copy of the GNU Library General Public License
19 * along with this library; see the file COPYING.LIB.  If not, write to
20 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
21 * Boston, MA 02110-1301, USA.
22 *
23 */
24
25#ifndef TranslateTransformOperation_h
26#define TranslateTransformOperation_h
27
28#include "platform/Length.h"
29#include "platform/LengthFunctions.h"
30#include "platform/transforms/TransformOperation.h"
31
32namespace WebCore {
33
34class PLATFORM_EXPORT TranslateTransformOperation : public TransformOperation {
35public:
36    static PassRefPtr<TranslateTransformOperation> create(const Length& tx, const Length& ty, OperationType type)
37    {
38        return adoptRef(new TranslateTransformOperation(tx, ty, 0, type));
39    }
40
41    static PassRefPtr<TranslateTransformOperation> create(const Length& tx, const Length& ty, double tz, OperationType type)
42    {
43        return adoptRef(new TranslateTransformOperation(tx, ty, tz, type));
44    }
45
46    virtual bool canBlendWith(const TransformOperation& other) const;
47
48    double x(const FloatSize& borderBoxSize) const { return floatValueForLength(m_x, borderBoxSize.width()); }
49    double y(const FloatSize& borderBoxSize) const { return floatValueForLength(m_y, borderBoxSize.height()); }
50
51    Length x() const { return m_x; }
52    Length y() const { return m_y; }
53    double z() const { return m_z; }
54
55private:
56    virtual bool isIdentity() const OVERRIDE { return !floatValueForLength(m_x, 1) && !floatValueForLength(m_y, 1) && !m_z; }
57
58    virtual OperationType type() const OVERRIDE { return m_type; }
59
60    virtual bool operator==(const TransformOperation& o) const OVERRIDE
61    {
62        if (!isSameType(o))
63            return false;
64        const TranslateTransformOperation* t = static_cast<const TranslateTransformOperation*>(&o);
65        return m_x == t->m_x && m_y == t->m_y && m_z == t->m_z;
66    }
67
68    virtual void apply(TransformationMatrix& transform, const FloatSize& borderBoxSize) const OVERRIDE
69    {
70        transform.translate3d(x(borderBoxSize), y(borderBoxSize), z());
71    }
72
73    virtual PassRefPtr<TransformOperation> blend(const TransformOperation* from, double progress, bool blendToIdentity = false) OVERRIDE;
74
75    virtual bool dependsOnBoxSize() const OVERRIDE
76    {
77        return m_x.isPercent() || m_y.isPercent();
78    }
79
80    TranslateTransformOperation(const Length& tx, const Length& ty, double tz, OperationType type)
81        : m_x(tx)
82        , m_y(ty)
83        , m_z(tz)
84        , m_type(type)
85    {
86        ASSERT(type == TranslateX || type == TranslateY || type == TranslateZ || type == Translate || type == Translate3D);
87    }
88
89    Length m_x;
90    Length m_y;
91    double m_z;
92    OperationType m_type;
93};
94
95} // namespace WebCore
96
97#endif // TranslateTransformOperation_h
98