mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-30 00:01:50 +00:00
99 lines
3.5 KiB
Plaintext
99 lines
3.5 KiB
Plaintext
/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
|
|
*
|
|
* 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/. */
|
|
|
|
#include "nsISupports.idl"
|
|
|
|
[scriptable, uuid(826e80c8-d70f-42e2-8aa9-82c05f2a370a)]
|
|
interface nsIScreen : nsISupports
|
|
{
|
|
/**
|
|
* Levels of brightness for the screen, from off to full brightness.
|
|
*/
|
|
const unsigned long BRIGHTNESS_DIM = 0;
|
|
const unsigned long BRIGHTNESS_FULL = 1;
|
|
|
|
/* The number of different brightness levels */
|
|
const unsigned long BRIGHTNESS_LEVELS = 2;
|
|
|
|
/**
|
|
* Allowable screen rotations, when the underlying widget toolkit
|
|
* supports rotating the screen.
|
|
*
|
|
* ROTATION_0_DEG is the default, unrotated configuration.
|
|
*/
|
|
const unsigned long ROTATION_0_DEG = 0;
|
|
const unsigned long ROTATION_90_DEG = 1;
|
|
const unsigned long ROTATION_180_DEG = 2;
|
|
const unsigned long ROTATION_270_DEG = 3;
|
|
|
|
/**
|
|
* A unique identifier for this device, useful for requerying
|
|
* for it via nsIScreenManager.
|
|
*/
|
|
readonly attribute unsigned long id;
|
|
|
|
/**
|
|
* These report screen dimensions in (screen-specific) device pixels
|
|
*/
|
|
void GetRect(out long left, out long top, out long width, out long height);
|
|
void GetAvailRect(out long left, out long top, out long width, out long height);
|
|
|
|
/**
|
|
* And these report in desktop pixels
|
|
*/
|
|
void GetRectDisplayPix(out long left, out long top, out long width, out long height);
|
|
void GetAvailRectDisplayPix(out long left, out long top, out long width, out long height);
|
|
|
|
/**
|
|
* Locks the minimum brightness of the screen, forcing it to be at
|
|
* least as bright as a certain brightness level. Each call to this
|
|
* function must eventually be followed by a corresponding call to
|
|
* unlockMinimumBrightness, with the same brightness level.
|
|
*
|
|
* @param brightness A brightness level, one of the above constants.
|
|
*/
|
|
void lockMinimumBrightness(in unsigned long brightness);
|
|
|
|
/**
|
|
* Releases a lock on the screen brightness. This must be called
|
|
* (eventually) after a corresponding call to lockMinimumBrightness.
|
|
*
|
|
* @param brightness A brightness level, one of the above constants.
|
|
*/
|
|
void unlockMinimumBrightness(in unsigned long brightness);
|
|
|
|
readonly attribute long pixelDepth;
|
|
readonly attribute long colorDepth;
|
|
/**
|
|
* Get/set the screen rotation, on platforms that support changing
|
|
* screen rotation.
|
|
*/
|
|
attribute unsigned long rotation;
|
|
|
|
/**
|
|
* The number of device pixels per desktop pixel for this screen (for
|
|
* hidpi configurations where there may be multiple device pixels per
|
|
* desktop px and/or per CSS px).
|
|
*
|
|
* This seems poorly named (something like devicePixelsPerDesktopPixel
|
|
* would be more accurate/explicit), but given that it is exposed to
|
|
* front-end code and may also be used by add-ons, it's probably not
|
|
* worth the disruption of changing it.
|
|
*
|
|
* Returns 1.0 if HiDPI mode is disabled or unsupported, or if the
|
|
* host OS uses device pixels as its desktop pixel units (as in Win8.1
|
|
* per-monitor dpi support).
|
|
*/
|
|
readonly attribute double contentsScaleFactor;
|
|
|
|
/**
|
|
* The default number of device pixels per unscaled CSS pixel for this
|
|
* screen. This is probably what contentsScaleFactor originally meant
|
|
* to be, prior to confusion between CSS pixels and desktop pixel units.
|
|
*/
|
|
readonly attribute double defaultCSSScaleFactor;
|
|
};
|