/usr/include/thunderbird/nsViewportInfo.h is in thunderbird-dev 1:24.4.0+build1-0ubuntu1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 | /* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef nsViewportInfo_h___
#define nsViewportInfo_h___
#include "mozilla/StandardInteger.h"
#include "nscore.h"
/**
* Default values for the nsViewportInfo class.
*/
static const double kViewportMinScale = 0.0;
static const double kViewportMaxScale = 10.0;
static const uint32_t kViewportMinWidth = 200;
static const uint32_t kViewportMaxWidth = 10000;
static const uint32_t kViewportMinHeight = 223;
static const uint32_t kViewportMaxHeight = 10000;
static const int32_t kViewportDefaultScreenWidth = 980;
/**
* Information retrieved from the <meta name="viewport"> tag. See
* nsContentUtils::GetViewportInfo for more information on this functionality.
*/
class MOZ_STACK_CLASS nsViewportInfo
{
public:
nsViewportInfo(uint32_t aDisplayWidth, uint32_t aDisplayHeight) :
mDefaultZoom(1.0),
mMinZoom(kViewportMinScale),
mMaxZoom(kViewportMaxScale),
mWidth(aDisplayWidth),
mHeight(aDisplayHeight),
mAutoSize(true),
mAllowZoom(true)
{
ConstrainViewportValues();
}
nsViewportInfo(double aDefaultZoom,
double aMinZoom,
double aMaxZoom,
uint32_t aWidth,
uint32_t aHeight,
bool aAutoSize,
bool aAllowZoom) :
mDefaultZoom(aDefaultZoom),
mMinZoom(aMinZoom),
mMaxZoom(aMaxZoom),
mWidth(aWidth),
mHeight(aHeight),
mAutoSize(aAutoSize),
mAllowZoom(aAllowZoom)
{
ConstrainViewportValues();
}
double GetDefaultZoom() { return mDefaultZoom; }
void SetDefaultZoom(const double aDefaultZoom);
double GetMinZoom() { return mMinZoom; }
double GetMaxZoom() { return mMaxZoom; }
uint32_t GetWidth() { return mWidth; }
uint32_t GetHeight() { return mHeight; }
bool IsAutoSizeEnabled() { return mAutoSize; }
bool IsZoomAllowed() { return mAllowZoom; }
private:
/**
* Constrain the viewport calculations from the
* nsContentUtils::GetViewportInfo() function in order to always return
* sane minimum/maximum values.
*/
void ConstrainViewportValues();
// Default zoom indicates the level at which the display is 'zoomed in'
// initially for the user, upon loading of the page.
double mDefaultZoom;
// The minimum zoom level permitted by the page.
double mMinZoom;
// The maximum zoom level permitted by the page.
double mMaxZoom;
// The width of the viewport, specified by the <meta name="viewport"> tag,
// in CSS pixels.
uint32_t mWidth;
// The height of the viewport, specified by the <meta name="viewport"> tag,
// in CSS pixels.
uint32_t mHeight;
// Whether or not we should automatically size the viewport to the device's
// width. This is true if the document has been optimized for mobile, and
// the width property of a specified <meta name="viewport"> tag is either
// not specified, or is set to the special value 'device-width'.
bool mAutoSize;
// Whether or not the user can zoom in and out on the page. Default is true.
bool mAllowZoom;
};
#endif
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