content/base/public/nsViewportInfo.h@97036ab72558 (annotated)
content/base/public/nsViewportInfo.h
Tue, 06 Jan 2015 21:39:09 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Tue, 06 Jan 2015 21:39:09 +0100
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
- permissions
- -rw-r--r--
Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
| michael@0 | 1 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 2 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 3 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 4 | |
| michael@0 | 5 | #ifndef nsViewportInfo_h___ |
| michael@0 | 6 | #define nsViewportInfo_h___ |
| michael@0 | 7 | |
| michael@0 | 8 | #include <stdint.h> |
| michael@0 | 9 | #include "mozilla/Attributes.h" |
| michael@0 | 10 | #include "Units.h" |
| michael@0 | 11 | |
| michael@0 | 12 | /** |
| michael@0 | 13 | * Default values for the nsViewportInfo class. |
| michael@0 | 14 | */ |
| michael@0 | 15 | static const mozilla::LayoutDeviceToScreenScale kViewportMinScale(0.0f); |
| michael@0 | 16 | static const mozilla::LayoutDeviceToScreenScale kViewportMaxScale(10.0f); |
| michael@0 | 17 | static const mozilla::CSSIntSize kViewportMinSize(200, 40); |
| michael@0 | 18 | static const mozilla::CSSIntSize kViewportMaxSize(10000, 10000); |
| michael@0 | 19 | static const int32_t kViewportDefaultScreenWidth = 980; |
| michael@0 | 20 | |
| michael@0 | 21 | /** |
| michael@0 | 22 | * Information retrieved from the <meta name="viewport"> tag. See |
| michael@0 | 23 | * nsContentUtils::GetViewportInfo for more information on this functionality. |
| michael@0 | 24 | */ |
| michael@0 | 25 | class MOZ_STACK_CLASS nsViewportInfo |
| michael@0 | 26 | { |
| michael@0 | 27 | public: |
| michael@0 | 28 | nsViewportInfo(const mozilla::ScreenIntSize& aDisplaySize, |
| michael@0 | 29 | bool aAllowZoom = true, bool aAllowDoubleTapZoom = true) : |
| michael@0 | 30 | mDefaultZoom(1.0), |
| michael@0 | 31 | mAutoSize(true), |
| michael@0 | 32 | mAllowZoom(aAllowZoom), |
| michael@0 | 33 | mAllowDoubleTapZoom(aAllowDoubleTapZoom) |
| michael@0 | 34 | { |
| michael@0 | 35 | mSize = mozilla::gfx::RoundedToInt(mozilla::ScreenSize(aDisplaySize) / mDefaultZoom); |
| michael@0 | 36 | mozilla::CSSToLayoutDeviceScale pixelRatio(1.0f); |
| michael@0 | 37 | mMinZoom = pixelRatio * kViewportMinScale; |
| michael@0 | 38 | mMaxZoom = pixelRatio * kViewportMaxScale; |
| michael@0 | 39 | ConstrainViewportValues(); |
| michael@0 | 40 | } |
| michael@0 | 41 | |
| michael@0 | 42 | nsViewportInfo(const mozilla::CSSToScreenScale& aDefaultZoom, |
| michael@0 | 43 | const mozilla::CSSToScreenScale& aMinZoom, |
| michael@0 | 44 | const mozilla::CSSToScreenScale& aMaxZoom, |
| michael@0 | 45 | const mozilla::CSSIntSize& aSize, |
| michael@0 | 46 | bool aAutoSize, |
| michael@0 | 47 | bool aAllowZoom, |
| michael@0 | 48 | bool aAllowDoubleTapZoom) : |
| michael@0 | 49 | mDefaultZoom(aDefaultZoom), |
| michael@0 | 50 | mMinZoom(aMinZoom), |
| michael@0 | 51 | mMaxZoom(aMaxZoom), |
| michael@0 | 52 | mSize(aSize), |
| michael@0 | 53 | mAutoSize(aAutoSize), |
| michael@0 | 54 | mAllowZoom(aAllowZoom), |
| michael@0 | 55 | mAllowDoubleTapZoom(aAllowDoubleTapZoom) |
| michael@0 | 56 | { |
| michael@0 | 57 | ConstrainViewportValues(); |
| michael@0 | 58 | } |
| michael@0 | 59 | |
| michael@0 | 60 | mozilla::CSSToScreenScale GetDefaultZoom() { return mDefaultZoom; } |
| michael@0 | 61 | void SetDefaultZoom(const mozilla::CSSToScreenScale& aDefaultZoom); |
| michael@0 | 62 | mozilla::CSSToScreenScale GetMinZoom() { return mMinZoom; } |
| michael@0 | 63 | mozilla::CSSToScreenScale GetMaxZoom() { return mMaxZoom; } |
| michael@0 | 64 | |
| michael@0 | 65 | mozilla::CSSIntSize GetSize() { return mSize; } |
| michael@0 | 66 | |
| michael@0 | 67 | bool IsAutoSizeEnabled() { return mAutoSize; } |
| michael@0 | 68 | bool IsZoomAllowed() { return mAllowZoom; } |
| michael@0 | 69 | bool IsDoubleTapZoomAllowed() { return mAllowDoubleTapZoom; } |
| michael@0 | 70 | |
| michael@0 | 71 | void SetAllowDoubleTapZoom(bool aAllowDoubleTapZoom) { mAllowDoubleTapZoom = aAllowDoubleTapZoom; } |
| michael@0 | 72 | |
| michael@0 | 73 | private: |
| michael@0 | 74 | |
| michael@0 | 75 | /** |
| michael@0 | 76 | * Constrain the viewport calculations from the |
| michael@0 | 77 | * nsContentUtils::GetViewportInfo() function in order to always return |
| michael@0 | 78 | * sane minimum/maximum values. |
| michael@0 | 79 | */ |
| michael@0 | 80 | void ConstrainViewportValues(); |
| michael@0 | 81 | |
| michael@0 | 82 | // Default zoom indicates the level at which the display is 'zoomed in' |
| michael@0 | 83 | // initially for the user, upon loading of the page. |
| michael@0 | 84 | mozilla::CSSToScreenScale mDefaultZoom; |
| michael@0 | 85 | |
| michael@0 | 86 | // The minimum zoom level permitted by the page. |
| michael@0 | 87 | mozilla::CSSToScreenScale mMinZoom; |
| michael@0 | 88 | |
| michael@0 | 89 | // The maximum zoom level permitted by the page. |
| michael@0 | 90 | mozilla::CSSToScreenScale mMaxZoom; |
| michael@0 | 91 | |
| michael@0 | 92 | // The size of the viewport, specified by the <meta name="viewport"> tag. |
| michael@0 | 93 | mozilla::CSSIntSize mSize; |
| michael@0 | 94 | |
| michael@0 | 95 | // Whether or not we should automatically size the viewport to the device's |
| michael@0 | 96 | // width. This is true if the document has been optimized for mobile, and |
| michael@0 | 97 | // the width property of a specified <meta name="viewport"> tag is either |
| michael@0 | 98 | // not specified, or is set to the special value 'device-width'. |
| michael@0 | 99 | bool mAutoSize; |
| michael@0 | 100 | |
| michael@0 | 101 | // Whether or not the user can zoom in and out on the page. Default is true. |
| michael@0 | 102 | bool mAllowZoom; |
| michael@0 | 103 | |
| michael@0 | 104 | // Whether or not the user can double-tap to zoom in. When this is disabled |
| michael@0 | 105 | // we can dispatch click events faster on a single tap because we don't have |
| michael@0 | 106 | // to wait to detect the double-tap |
| michael@0 | 107 | bool mAllowDoubleTapZoom; |
| michael@0 | 108 | }; |
| michael@0 | 109 | |
| michael@0 | 110 | #endif |
| michael@0 | 111 |
