The Tor Browser / file comparison
comparison: content/base/public/nsViewportInfo.h
content/base/public/nsViewportInfo.h
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
equal
deleted
inserted
replaced
| -1:000000000000 | 0:18850135e1f2 |
|---|---|
| 1 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 4 | |
| 5 #ifndef nsViewportInfo_h___ | |
| 6 #define nsViewportInfo_h___ | |
| 7 | |
| 8 #include <stdint.h> | |
| 9 #include "mozilla/Attributes.h" | |
| 10 #include "Units.h" | |
| 11 | |
| 12 /** | |
| 13 * Default values for the nsViewportInfo class. | |
| 14 */ | |
| 15 static const mozilla::LayoutDeviceToScreenScale kViewportMinScale(0.0f); | |
| 16 static const mozilla::LayoutDeviceToScreenScale kViewportMaxScale(10.0f); | |
| 17 static const mozilla::CSSIntSize kViewportMinSize(200, 40); | |
| 18 static const mozilla::CSSIntSize kViewportMaxSize(10000, 10000); | |
| 19 static const int32_t kViewportDefaultScreenWidth = 980; | |
| 20 | |
| 21 /** | |
| 22 * Information retrieved from the <meta name="viewport"> tag. See | |
| 23 * nsContentUtils::GetViewportInfo for more information on this functionality. | |
| 24 */ | |
| 25 class MOZ_STACK_CLASS nsViewportInfo | |
| 26 { | |
| 27 public: | |
| 28 nsViewportInfo(const mozilla::ScreenIntSize& aDisplaySize, | |
| 29 bool aAllowZoom = true, bool aAllowDoubleTapZoom = true) : | |
| 30 mDefaultZoom(1.0), | |
| 31 mAutoSize(true), | |
| 32 mAllowZoom(aAllowZoom), | |
| 33 mAllowDoubleTapZoom(aAllowDoubleTapZoom) | |
| 34 { | |
| 35 mSize = mozilla::gfx::RoundedToInt(mozilla::ScreenSize(aDisplaySize) / mDefaultZoom); | |
| 36 mozilla::CSSToLayoutDeviceScale pixelRatio(1.0f); | |
| 37 mMinZoom = pixelRatio * kViewportMinScale; | |
| 38 mMaxZoom = pixelRatio * kViewportMaxScale; | |
| 39 ConstrainViewportValues(); | |
| 40 } | |
| 41 | |
| 42 nsViewportInfo(const mozilla::CSSToScreenScale& aDefaultZoom, | |
| 43 const mozilla::CSSToScreenScale& aMinZoom, | |
| 44 const mozilla::CSSToScreenScale& aMaxZoom, | |
| 45 const mozilla::CSSIntSize& aSize, | |
| 46 bool aAutoSize, | |
| 47 bool aAllowZoom, | |
| 48 bool aAllowDoubleTapZoom) : | |
| 49 mDefaultZoom(aDefaultZoom), | |
| 50 mMinZoom(aMinZoom), | |
| 51 mMaxZoom(aMaxZoom), | |
| 52 mSize(aSize), | |
| 53 mAutoSize(aAutoSize), | |
| 54 mAllowZoom(aAllowZoom), | |
| 55 mAllowDoubleTapZoom(aAllowDoubleTapZoom) | |
| 56 { | |
| 57 ConstrainViewportValues(); | |
| 58 } | |
| 59 | |
| 60 mozilla::CSSToScreenScale GetDefaultZoom() { return mDefaultZoom; } | |
| 61 void SetDefaultZoom(const mozilla::CSSToScreenScale& aDefaultZoom); | |
| 62 mozilla::CSSToScreenScale GetMinZoom() { return mMinZoom; } | |
| 63 mozilla::CSSToScreenScale GetMaxZoom() { return mMaxZoom; } | |
| 64 | |
| 65 mozilla::CSSIntSize GetSize() { return mSize; } | |
| 66 | |
| 67 bool IsAutoSizeEnabled() { return mAutoSize; } | |
| 68 bool IsZoomAllowed() { return mAllowZoom; } | |
| 69 bool IsDoubleTapZoomAllowed() { return mAllowDoubleTapZoom; } | |
| 70 | |
| 71 void SetAllowDoubleTapZoom(bool aAllowDoubleTapZoom) { mAllowDoubleTapZoom = aAllowDoubleTapZoom; } | |
| 72 | |
| 73 private: | |
| 74 | |
| 75 /** | |
| 76 * Constrain the viewport calculations from the | |
| 77 * nsContentUtils::GetViewportInfo() function in order to always return | |
| 78 * sane minimum/maximum values. | |
| 79 */ | |
| 80 void ConstrainViewportValues(); | |
| 81 | |
| 82 // Default zoom indicates the level at which the display is 'zoomed in' | |
| 83 // initially for the user, upon loading of the page. | |
| 84 mozilla::CSSToScreenScale mDefaultZoom; | |
| 85 | |
| 86 // The minimum zoom level permitted by the page. | |
| 87 mozilla::CSSToScreenScale mMinZoom; | |
| 88 | |
| 89 // The maximum zoom level permitted by the page. | |
| 90 mozilla::CSSToScreenScale mMaxZoom; | |
| 91 | |
| 92 // The size of the viewport, specified by the <meta name="viewport"> tag. | |
| 93 mozilla::CSSIntSize mSize; | |
| 94 | |
| 95 // Whether or not we should automatically size the viewport to the device's | |
| 96 // width. This is true if the document has been optimized for mobile, and | |
| 97 // the width property of a specified <meta name="viewport"> tag is either | |
| 98 // not specified, or is set to the special value 'device-width'. | |
| 99 bool mAutoSize; | |
| 100 | |
| 101 // Whether or not the user can zoom in and out on the page. Default is true. | |
| 102 bool mAllowZoom; | |
| 103 | |
| 104 // Whether or not the user can double-tap to zoom in. When this is disabled | |
| 105 // we can dispatch click events faster on a single tap because we don't have | |
| 106 // to wait to detect the double-tap | |
| 107 bool mAllowDoubleTapZoom; | |
| 108 }; | |
| 109 | |
| 110 #endif | |
| 111 |
