зеркало из https://github.com/mozilla/gecko-dev.git
102 строки
3.6 KiB
C++
102 строки
3.6 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* vim: sw=2 ts=8 et :
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*/
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at:
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla Code.
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*
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* The Initial Developer of the Original Code is
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* The Mozilla Foundation
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* Portions created by the Initial Developer are Copyright (C) 2011
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Chris Jones <jones.chris.g@gmail.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef nsBaseScreen_h
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#define nsBaseScreen_h
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#include "mozilla/Attributes.h"
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#include "nsIScreen.h"
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class nsBaseScreen : public nsIScreen
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{
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public:
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nsBaseScreen();
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virtual ~nsBaseScreen();
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NS_DECL_ISUPPORTS
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// nsIScreen interface
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/**
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* Simple management of screen brightness locks. This abstract base class
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* allows all widget implementations to share brightness locking code.
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*/
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NS_IMETHOD LockMinimumBrightness(PRUint32 aBrightness);
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NS_IMETHOD UnlockMinimumBrightness(PRUint32 aBrightness);
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NS_IMETHOD GetRotation(PRUint32* aRotation) {
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*aRotation = nsIScreen::ROTATION_0_DEG;
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return NS_OK;
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}
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NS_IMETHOD SetRotation(PRUint32 aRotation) { return NS_ERROR_NOT_AVAILABLE; }
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protected:
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/**
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* Manually set the current level of brightness locking. This is called after
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* we determine, based on the current active locks, what the strongest
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* lock is. You should normally not call this function - it will be
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* called automatically by this class.
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*
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* Each widget implementation should implement this in a way that
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* makes sense there. This is normally the only function that
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* contains widget-specific code.
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*
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* The default implementation does nothing.
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*
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* @param aBrightness The current brightness level to set. If this is
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* nsIScreen_MOZILLA_2_0_BRANCH::BRIGHTNESS_LEVELS
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* (an impossible value for a brightness level to be),
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* then that signifies that there is no current
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* minimum brightness level, and the screen can shut off.
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*/
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virtual void ApplyMinimumBrightness(PRUint32 aBrightness) { }
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private:
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/**
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* Checks what the minimum brightness value is, and calls
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* ApplyMinimumBrightness.
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*/
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void CheckMinimumBrightness();
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PRUint32 mBrightnessLocks[nsIScreen::BRIGHTNESS_LEVELS];
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};
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#endif // nsBaseScreen_h
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