1/*
2 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
3 *           (C) 1999 Antti Koivisto (koivisto@kde.org)
4 *           (C) 2001 Dirk Mueller (mueller@kde.org)
5 *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
6 * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
7 * Copyright (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
8 * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
9 *
10 * This library is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Library General Public
12 * License as published by the Free Software Foundation; either
13 * version 2 of the License, or (at your option) any later version.
14 *
15 * This library is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
18 * Library General Public License for more details.
19 *
20 * You should have received a copy of the GNU Library General Public License
21 * along with this library; see the file COPYING.LIB.  If not, write to
22 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
23 * Boston, MA 02110-1301, USA.
24 *
25 */
26
27#ifndef ViewportArguments_h
28#define ViewportArguments_h
29
30#include "IntSize.h"
31#include <wtf/Forward.h>
32
33namespace WebCore {
34
35class Document;
36
37enum ViewportErrorCode {
38    UnrecognizedViewportArgumentKeyError,
39    UnrecognizedViewportArgumentValueError,
40    TruncatedViewportArgumentValueError,
41    MaximumScaleTooLargeError,
42    TargetDensityDpiTooSmallOrLargeError
43};
44
45struct ViewportAttributes {
46    IntSize layoutSize;
47
48    float devicePixelRatio;
49
50    float initialScale;
51    float minimumScale;
52    float maximumScale;
53
54    float userScalable;
55};
56
57struct ViewportArguments {
58
59    enum {
60        ValueAuto = -1,
61        ValueDesktopWidth = -2,
62        ValueDeviceWidth = -3,
63        ValueDeviceHeight = -4,
64        ValueDeviceDPI = -5,
65        ValueLowDPI = -6,
66        ValueMediumDPI = -7,
67        ValueHighDPI = -8
68    };
69
70    ViewportArguments()
71        : initialScale(ValueAuto)
72        , minimumScale(ValueAuto)
73        , maximumScale(ValueAuto)
74        , width(ValueAuto)
75        , height(ValueAuto)
76        , targetDensityDpi(ValueAuto)
77        , userScalable(ValueAuto)
78    {
79    }
80
81    float initialScale;
82    float minimumScale;
83    float maximumScale;
84    float width;
85    float height;
86    float targetDensityDpi;
87    float userScalable;
88
89    bool operator==(const ViewportArguments& other) const
90    {
91        return initialScale == other.initialScale
92            && minimumScale == other.minimumScale
93            && maximumScale == other.maximumScale
94            && width == other.width
95            && height == other.height
96            && targetDensityDpi == other.targetDensityDpi
97            && userScalable == other.userScalable;
98    }
99};
100
101ViewportAttributes computeViewportAttributes(ViewportArguments args, int desktopWidth, int deviceWidth, int deviceHeight, int deviceDPI, IntSize visibleViewport);
102
103void setViewportFeature(const String& keyString, const String& valueString, Document*, void* data);
104void reportViewportWarning(Document*, ViewportErrorCode, const String& replacement1, const String& replacement2);
105
106} // namespace WebCore
107
108#endif // ViewportArguments_h
109