pjs/widget/xpwidgets/nsBaseScreen.cpp

93 строки
3.0 KiB
C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: sw=2 ts=8 et :
*/
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at:
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Code.
*
* The Initial Developer of the Original Code is
* The Mozilla Foundation
* Portions created by the Initial Developer are Copyright (C) 2011
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Chris Jones <jones.chris.g@gmail.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsBaseScreen.h"
NS_IMPL_ISUPPORTS1(nsBaseScreen, nsIScreen)
nsBaseScreen::nsBaseScreen()
{
for (PRUint32 i = 0; i < nsIScreen::BRIGHTNESS_LEVELS; i++)
mBrightnessLocks[i] = 0;
}
nsBaseScreen::~nsBaseScreen() { }
NS_IMETHODIMP
nsBaseScreen::LockMinimumBrightness(PRUint32 aBrightness)
{
NS_ABORT_IF_FALSE(
aBrightness < nsIScreen::BRIGHTNESS_LEVELS,
"Invalid brightness level to lock");
mBrightnessLocks[aBrightness]++;
NS_ABORT_IF_FALSE(mBrightnessLocks[aBrightness] > 0,
"Overflow after locking brightness level");
CheckMinimumBrightness();
return NS_OK;
}
NS_IMETHODIMP
nsBaseScreen::UnlockMinimumBrightness(PRUint32 aBrightness)
{
NS_ABORT_IF_FALSE(
aBrightness < nsIScreen::BRIGHTNESS_LEVELS,
"Invalid brightness level to lock");
NS_ABORT_IF_FALSE(mBrightnessLocks[aBrightness] > 0,
"Unlocking a brightness level with no corresponding lock");
mBrightnessLocks[aBrightness]--;
CheckMinimumBrightness();
return NS_OK;
}
void
nsBaseScreen::CheckMinimumBrightness()
{
PRUint32 brightness = nsIScreen::BRIGHTNESS_LEVELS;
for (PRUint32 i = 0; i < nsIScreen::BRIGHTNESS_LEVELS; i++)
if (mBrightnessLocks[i] > 0)
brightness = i;
ApplyMinimumBrightness(brightness);
}