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136 lines
4.5 KiB
C++
136 lines
4.5 KiB
C++
/*
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* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
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* (C) 1999 Antti Koivisto (koivisto@kde.org)
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* (C) 2001 Dirk Mueller (mueller@kde.org)
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* (C) 2006 Alexey Proskuryakov (ap@webkit.org)
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* Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
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* Copyright (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
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* Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
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* Copyright (C) 2012-2013 Intel Corporation. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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*/
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#ifndef ViewportDescription_h
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#define ViewportDescription_h
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#include "platform/Length.h"
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#include "platform/geometry/FloatSize.h"
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namespace blink {
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class LocalFrame;
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struct ViewportDescription {
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enum Type {
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// These are ordered in increasing importance.
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UserAgentStyleSheet,
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HandheldFriendlyMeta,
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MobileOptimizedMeta,
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ViewportMeta,
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AuthorStyleSheet
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} type;
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enum {
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ValueAuto = -1,
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ValueDeviceWidth = -2,
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ValueDeviceHeight = -3,
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ValuePortrait = -4,
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ValueLandscape = -5,
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ValueDeviceDPI = -6,
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ValueLowDPI = -7,
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ValueMediumDPI = -8,
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ValueHighDPI = -9,
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ValueExtendToZoom = -10
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};
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ViewportDescription(Type type = UserAgentStyleSheet)
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: type(type)
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, zoom(ValueAuto)
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, minZoom(ValueAuto)
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, maxZoom(ValueAuto)
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, userZoom(true)
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, orientation(ValueAuto)
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, deprecatedTargetDensityDPI(ValueAuto)
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, zoomIsExplicit(false)
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, minZoomIsExplicit(false)
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, maxZoomIsExplicit(false)
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, userZoomIsExplicit(false)
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{
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}
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Length minWidth;
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Length maxWidth;
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Length minHeight;
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Length maxHeight;
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float zoom;
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float minZoom;
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float maxZoom;
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bool userZoom;
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float orientation;
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float deprecatedTargetDensityDPI; // Only used for Android WebView
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// Whether the computed value was explicitly specified rather than being
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// inferred.
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bool zoomIsExplicit;
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bool minZoomIsExplicit;
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bool maxZoomIsExplicit;
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bool userZoomIsExplicit;
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bool operator==(const ViewportDescription& other) const
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{
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// Used for figuring out whether to reset the viewport or not,
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// thus we are not taking type into account.
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return minWidth == other.minWidth
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&& maxWidth == other.maxWidth
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&& minHeight == other.minHeight
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&& maxHeight == other.maxHeight
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&& zoom == other.zoom
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&& minZoom == other.minZoom
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&& maxZoom == other.maxZoom
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&& userZoom == other.userZoom
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&& orientation == other.orientation
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&& deprecatedTargetDensityDPI == other.deprecatedTargetDensityDPI
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&& zoomIsExplicit == other.zoomIsExplicit
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&& minZoomIsExplicit == other.minZoomIsExplicit
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&& maxZoomIsExplicit == other.maxZoomIsExplicit
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&& userZoomIsExplicit == other.userZoomIsExplicit;
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}
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bool operator!=(const ViewportDescription& other) const
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{
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return !(*this == other);
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}
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bool isLegacyViewportType() const { return type >= HandheldFriendlyMeta && type <= ViewportMeta; }
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bool isMetaViewportType() const { return type == ViewportMeta; }
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bool isSpecifiedByAuthor() const { return type != UserAgentStyleSheet; }
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// Reports UMA stat on whether the page is considered mobile or desktop and what kind of
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// mobile it is. Applies only to Android, must only be called once per page load.
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void reportMobilePageStats(const LocalFrame*) const;
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private:
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enum Direction { Horizontal, Vertical };
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static float resolveViewportLength(const Length&, const FloatSize& initialViewportSize, Direction);
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};
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} // namespace blink
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#endif // ViewportDescription_h
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