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/*
* 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;
float shrinkToFit;
};
struct ViewportArguments {
enum Type {
// These are ordered in increasing importance.
Implicit,
#if PLATFORM(IOS)
PluginDocument,
ImageDocument,
#endif
ViewportMeta,
CSSDeviceAdaptation
} type;
enum {
ValueAuto = -1,
ValueDeviceWidth = -2,
ValueDeviceHeight = -3,
ValuePortrait = -4,
ValueLandscape = -5
};
explicit ViewportArguments(Type type = Implicit)
: type(type)
{
}
// All arguments are in CSS units.
ViewportAttributes resolve(const FloatSize& initialViewportSize, const FloatSize& deviceSize, int defaultWidth) const;
float width { ValueAuto };
float minWidth { ValueAuto };
float maxWidth { ValueAuto };
float height { ValueAuto };
float minHeight { ValueAuto };
float maxHeight { ValueAuto };
float zoom { ValueAuto };
float minZoom { ValueAuto };
float maxZoom { ValueAuto };
float userZoom { ValueAuto };
float orientation { ValueAuto };
float shrinkToFit { ValueAuto };
bool widthWasExplicit { false };
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
&& shrinkToFit == other.shrinkToFit
&& widthWasExplicit == other.widthWasExplicit;
}
bool operator!=(const ViewportArguments& other) const
{
return !(*this == other);
}
#if 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
};
WEBCORE_EXPORT ViewportAttributes computeViewportAttributes(ViewportArguments args, int desktopWidth, int deviceWidth, int deviceHeight, float devicePixelRatio, IntSize visibleViewport);
WEBCORE_EXPORT void restrictMinimumScaleFactorToViewportSize(ViewportAttributes& result, IntSize visibleViewport, float devicePixelRatio);
WEBCORE_EXPORT void restrictScaleFactorToInitialScaleIfNotUserScalable(ViewportAttributes& result);
float computeMinimumScaleFactorForContentContained(const ViewportAttributes& result, const IntSize& viewportSize, const IntSize& contentSize);
void setViewportFeature(ViewportArguments&, Document&, StringView key, StringView value);
TextStream& operator<<(TextStream&, const ViewportArguments&);
} // namespace WebCore
#endif // ViewportArguments_h
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