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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) 2012-2013 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 ViewportDescription_h
#define ViewportDescription_h
#include "core/page/PageScaleConstraints.h"
#include "platform/Length.h"
#include "platform/geometry/FloatSize.h"
namespace blink {
class LocalFrame;
struct ViewportDescription {
enum Type {
// These are ordered in increasing importance.
UserAgentStyleSheet,
HandheldFriendlyMeta,
MobileOptimizedMeta,
ViewportMeta,
AuthorStyleSheet
} type;
enum {
ValueAuto = -1,
ValueDeviceWidth = -2,
ValueDeviceHeight = -3,
ValuePortrait = -4,
ValueLandscape = -5,
ValueDeviceDPI = -6,
ValueLowDPI = -7,
ValueMediumDPI = -8,
ValueHighDPI = -9,
ValueExtendToZoom = -10
};
ViewportDescription(Type type = UserAgentStyleSheet)
: type(type)
, zoom(ValueAuto)
, minZoom(ValueAuto)
, maxZoom(ValueAuto)
, userZoom(true)
, orientation(ValueAuto)
, deprecatedTargetDensityDPI(ValueAuto)
, zoomIsExplicit(false)
, minZoomIsExplicit(false)
, maxZoomIsExplicit(false)
, userZoomIsExplicit(false)
{
}
// All arguments are in CSS units.
PageScaleConstraints resolve(const FloatSize& initialViewportSize, Length legacyFallbackWidth) const;
Length minWidth;
Length maxWidth;
Length minHeight;
Length maxHeight;
float zoom;
float minZoom;
float maxZoom;
bool userZoom;
float orientation;
float deprecatedTargetDensityDPI; // Only used for Android WebView
// Whether the computed value was explicitly specified rather than being
// inferred.
bool zoomIsExplicit;
bool minZoomIsExplicit;
bool maxZoomIsExplicit;
bool userZoomIsExplicit;
bool operator==(const ViewportDescription& other) const
{
// Used for figuring out whether to reset the viewport or not,
// thus we are not taking type into account.
return minWidth == other.minWidth
&& maxWidth == other.maxWidth
&& minHeight == other.minHeight
&& maxHeight == other.maxHeight
&& zoom == other.zoom
&& minZoom == other.minZoom
&& maxZoom == other.maxZoom
&& userZoom == other.userZoom
&& orientation == other.orientation
&& deprecatedTargetDensityDPI == other.deprecatedTargetDensityDPI
&& zoomIsExplicit == other.zoomIsExplicit
&& minZoomIsExplicit == other.minZoomIsExplicit
&& maxZoomIsExplicit == other.maxZoomIsExplicit
&& userZoomIsExplicit == other.userZoomIsExplicit;
}
bool operator!=(const ViewportDescription& other) const
{
return !(*this == other);
}
bool isLegacyViewportType() const { return type >= HandheldFriendlyMeta && type <= ViewportMeta; }
bool isMetaViewportType() const { return type == ViewportMeta; }
bool isSpecifiedByAuthor() const { return type != UserAgentStyleSheet; }
// Reports UMA stat on whether the page is considered mobile or desktop and what kind of
// mobile it is. Applies only to Android, must only be called once per page load.
void reportMobilePageStats(const LocalFrame*) const;
private:
enum Direction { Horizontal, Vertical };
static float resolveViewportLength(const Length&, const FloatSize& initialViewportSize, Direction);
};
} // namespace blink
#endif // ViewportDescription_h
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