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 * Copyright (C) 2012-2013 Intel Corporation. All rights reserved. 10 * 11 * This library is free software; you can redistribute it and/or 12 * modify it under the terms of the GNU Library General Public 13 * License as published by the Free Software Foundation; either 14 * version 2 of the License, or (at your option) any later version. 15 * 16 * This library is distributed in the hope that it will be useful, 17 * but WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 19 * Library General Public License for more details. 20 * 21 * You should have received a copy of the GNU Library General Public License 22 * along with this library; see the file COPYING.LIB. If not, write to 23 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 24 * Boston, MA 02110-1301, USA. 25 * 26 */ 27 28 #ifndef ViewportDescription_h 29 #define ViewportDescription_h 30 31 #include "core/page/PageScaleConstraints.h" 32 #include "platform/Length.h" 33 #include "platform/geometry/FloatSize.h" 34 35 namespace WebCore { 36 37 struct ViewportDescription { 38 39 enum Type { 40 // These are ordered in increasing importance. 41 UserAgentStyleSheet, 42 HandheldFriendlyMeta, 43 MobileOptimizedMeta, 44 ViewportMeta, 45 AuthorStyleSheet 46 } type; 47 48 enum { 49 ValueAuto = -1, 50 ValueDeviceWidth = -2, 51 ValueDeviceHeight = -3, 52 ValuePortrait = -4, 53 ValueLandscape = -5, 54 ValueDeviceDPI = -6, 55 ValueLowDPI = -7, 56 ValueMediumDPI = -8, 57 ValueHighDPI = -9, 58 ValueExtendToZoom = -10 59 }; 60 61 ViewportDescription(Type type = UserAgentStyleSheet) typeViewportDescription62 : type(type) 63 , zoom(ValueAuto) 64 , minZoom(ValueAuto) 65 , maxZoom(ValueAuto) 66 , userZoom(ValueAuto) 67 , orientation(ValueAuto) 68 , deprecatedTargetDensityDPI(ValueAuto) 69 { 70 } 71 72 // All arguments are in CSS units. 73 PageScaleConstraints resolve(const FloatSize& initialViewportSize) const; 74 75 Length minWidth; 76 Length maxWidth; 77 Length minHeight; 78 Length maxHeight; 79 float zoom; 80 float minZoom; 81 float maxZoom; 82 float userZoom; 83 float orientation; 84 float deprecatedTargetDensityDPI; // Only used for Android WebView 85 86 bool operator==(const ViewportDescription& other) const 87 { 88 // Used for figuring out whether to reset the viewport or not, 89 // thus we are not taking type into account. 90 return minWidth == other.minWidth 91 && maxWidth == other.maxWidth 92 && minHeight == other.minHeight 93 && maxHeight == other.maxHeight 94 && zoom == other.zoom 95 && minZoom == other.minZoom 96 && maxZoom == other.maxZoom 97 && userZoom == other.userZoom 98 && orientation == other.orientation 99 && deprecatedTargetDensityDPI == other.deprecatedTargetDensityDPI; 100 } 101 102 bool operator!=(const ViewportDescription& other) const 103 { 104 return !(*this == other); 105 } 106 isLegacyViewportTypeViewportDescription107 bool isLegacyViewportType() const { return type >= HandheldFriendlyMeta && type <= ViewportMeta; } isMetaViewportTypeViewportDescription108 bool isMetaViewportType() const { return type == ViewportMeta; } isSpecifiedByAuthorViewportDescription109 bool isSpecifiedByAuthor() const { return type != UserAgentStyleSheet; } 110 111 private: 112 enum Direction { Horizontal, Vertical }; 113 static float resolveViewportLength(const Length&, const FloatSize& initialViewportSize, Direction); 114 }; 115 116 } // namespace WebCore 117 118 #endif // ViewportDescription_h 119