1/*
2 * Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann@kde.org>
3 * Copyright (C) 2004, 2005, 2006, 2007 Rob Buis <buis@kde.org>
4 * Copyright (C) 2014 Samsung Electronics. All rights reserved.
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14 * Library General Public License for more details.
15 *
16 * You should have received a copy of the GNU Library General Public License
17 * along with this library; see the file COPYING.LIB.  If not, write to
18 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
19 * Boston, MA 02110-1301, USA.
20 */
21
22#ifndef SVGZoomAndPan_h
23#define SVGZoomAndPan_h
24
25#include "core/SVGNames.h"
26#include "core/dom/QualifiedName.h"
27#include "wtf/HashSet.h"
28
29namespace blink {
30
31class ExceptionState;
32
33enum SVGZoomAndPanType {
34    SVGZoomAndPanUnknown = 0,
35    SVGZoomAndPanDisable,
36    SVGZoomAndPanMagnify
37};
38
39class SVGZoomAndPan {
40public:
41    // Forward declare enumerations in the W3C naming scheme, for IDL generation.
42    enum {
43        SVG_ZOOMANDPAN_UNKNOWN = SVGZoomAndPanUnknown,
44        SVG_ZOOMANDPAN_DISABLE = SVGZoomAndPanDisable,
45        SVG_ZOOMANDPAN_MAGNIFY = SVGZoomAndPanMagnify
46    };
47
48    virtual ~SVGZoomAndPan() { }
49
50    static bool isKnownAttribute(const QualifiedName&);
51    static void addSupportedAttributes(HashSet<QualifiedName>&);
52
53    static SVGZoomAndPanType parseFromNumber(unsigned short number)
54    {
55        if (!number || number > SVGZoomAndPanMagnify)
56            return SVGZoomAndPanUnknown;
57        return static_cast<SVGZoomAndPanType>(number);
58    }
59
60    bool parseZoomAndPan(const LChar*& start, const LChar* end);
61    bool parseZoomAndPan(const UChar*& start, const UChar* end);
62
63    bool parseAttribute(const QualifiedName& name, const AtomicString& value)
64    {
65        if (name == SVGNames::zoomAndPanAttr) {
66            m_zoomAndPan = SVGZoomAndPanUnknown;
67            if (!value.isEmpty()) {
68                if (value.is8Bit()) {
69                    const LChar* start = value.characters8();
70                    parseZoomAndPan(start, start + value.length());
71                } else {
72                    const UChar* start = value.characters16();
73                    parseZoomAndPan(start, start + value.length());
74                }
75            }
76            return true;
77        }
78
79        return false;
80    }
81
82    // JS API
83    SVGZoomAndPanType zoomAndPan() const { return m_zoomAndPan; }
84    virtual void setZoomAndPan(unsigned short value) { m_zoomAndPan = parseFromNumber(value); }
85    virtual void setZoomAndPan(unsigned short value, ExceptionState&) { setZoomAndPan(value); }
86
87protected:
88    SVGZoomAndPan();
89    void resetZoomAndPan();
90
91private:
92    SVGZoomAndPanType m_zoomAndPan;
93};
94
95} // namespace blink
96
97#endif // SVGZoomAndPan_h
98