1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
|
/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* (C) 2001 Dirk Mueller (mueller@kde.org)
* (C) 2006 Alexey Proskuryakov (ap@webkit.org)
* Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
* Copyright (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
* Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
* Copyright (C) 2012 Intel Corporation. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#ifndef ViewportArguments_h
#define ViewportArguments_h
#include "FloatSize.h"
#include <wtf/Forward.h>
namespace WebCore {
class Document;
enum ViewportErrorCode {
UnrecognizedViewportArgumentKeyError,
UnrecognizedViewportArgumentValueError,
TruncatedViewportArgumentValueError,
MaximumScaleTooLargeError
};
struct ViewportAttributes {
FloatSize layoutSize;
float initialScale;
float minimumScale;
float maximumScale;
float userScalable;
float orientation;
};
struct ViewportArguments {
enum Type {
// These are ordered in increasing importance.
Implicit,
#if ENABLE(LEGACY_VIEWPORT_ADAPTION)
XHTMLMobileProfile,
HandheldFriendlyMeta,
MobileOptimizedMeta,
#endif
ViewportMeta,
CSSDeviceAdaptation
} type;
enum {
ValueAuto = -1,
ValueDeviceWidth = -2,
ValueDeviceHeight = -3,
ValuePortrait = -4,
ValueLandscape = -5
};
ViewportArguments(Type type = Implicit)
: type(type)
, width(ValueAuto)
, minWidth(ValueAuto)
, maxWidth(ValueAuto)
, height(ValueAuto)
, minHeight(ValueAuto)
, maxHeight(ValueAuto)
, zoom(ValueAuto)
, minZoom(ValueAuto)
, maxZoom(ValueAuto)
, userZoom(ValueAuto)
, orientation(ValueAuto)
{
}
// All arguments are in CSS units.
ViewportAttributes resolve(const FloatSize& initialViewportSize, const FloatSize& deviceSize, int defaultWidth) const;
float width;
float minWidth;
float maxWidth;
float height;
float minHeight;
float maxHeight;
float zoom;
float minZoom;
float maxZoom;
float userZoom;
float orientation;
bool operator==(const ViewportArguments& other) const
{
// Used for figuring out whether to reset the viewport or not,
// thus we are not taking type into account.
return width == other.width
&& minWidth == other.minWidth
&& maxWidth == other.maxWidth
&& height == other.height
&& minHeight == other.minHeight
&& maxHeight == other.maxHeight
&& zoom == other.zoom
&& minZoom == other.minZoom
&& maxZoom == other.maxZoom
&& userZoom == other.userZoom
&& orientation == other.orientation;
}
bool operator!=(const ViewportArguments& other) const
{
return !(*this == other);
}
#if PLATFORM(BLACKBERRY) || PLATFORM(GTK) || PLATFORM(QT)
// FIXME: We're going to keep this constant around until all embedders
// refactor their code to no longer need it.
static const float deprecatedTargetDPI;
#endif
};
ViewportAttributes computeViewportAttributes(ViewportArguments args, int desktopWidth, int deviceWidth, int deviceHeight, float devicePixelRatio, IntSize visibleViewport);
void restrictMinimumScaleFactorToViewportSize(ViewportAttributes& result, IntSize visibleViewport, float devicePixelRatio);
void restrictScaleFactorToInitialScaleIfNotUserScalable(ViewportAttributes& result);
float computeMinimumScaleFactorForContentContained(const ViewportAttributes& result, const IntSize& viewportSize, const IntSize& contentSize);
void setViewportFeature(const String& keyString, const String& valueString, Document*, void* data);
void reportViewportWarning(Document*, ViewportErrorCode, const String& replacement1, const String& replacement2);
} // namespace WebCore
#endif // ViewportArguments_h
|
