1 : /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
2 : * vim: sw=2 ts=8 et :
3 : */
4 : /* ***** BEGIN LICENSE BLOCK *****
5 : * Version: MPL 1.1/GPL 2.0/LGPL 2.1
6 : *
7 : * The contents of this file are subject to the Mozilla Public License Version
8 : * 1.1 (the "License"); you may not use this file except in compliance with
9 : * the License. You may obtain a copy of the License at:
10 : * http://www.mozilla.org/MPL/
11 : *
12 : * Software distributed under the License is distributed on an "AS IS" basis,
13 : * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
14 : * for the specific language governing rights and limitations under the
15 : * License.
16 : *
17 : * The Original Code is Mozilla Code.
18 : *
19 : * The Initial Developer of the Original Code is
20 : * The Mozilla Foundation
21 : * Portions created by the Initial Developer are Copyright (C) 2011
22 : * the Initial Developer. All Rights Reserved.
23 : *
24 : * Contributor(s):
25 : * Chris Jones <jones.chris.g@gmail.com>
26 : *
27 : * Alternatively, the contents of this file may be used under the terms of
28 : * either the GNU General Public License Version 2 or later (the "GPL"), or
29 : * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
30 : * in which case the provisions of the GPL or the LGPL are applicable instead
31 : * of those above. If you wish to allow use of your version of this file only
32 : * under the terms of either the GPL or the LGPL, and not to allow others to
33 : * use your version of this file under the terms of the MPL, indicate your
34 : * decision by deleting the provisions above and replace them with the notice
35 : * and other provisions required by the GPL or the LGPL. If you do not delete
36 : * the provisions above, a recipient may use your version of this file under
37 : * the terms of any one of the MPL, the GPL or the LGPL.
38 : *
39 : * ***** END LICENSE BLOCK ***** */
40 :
41 : #include "nsBaseScreen.h"
42 :
43 0 : NS_IMPL_ISUPPORTS1(nsBaseScreen, nsIScreen)
44 :
45 0 : nsBaseScreen::nsBaseScreen()
46 : {
47 0 : for (PRUint32 i = 0; i < nsIScreen::BRIGHTNESS_LEVELS; i++)
48 0 : mBrightnessLocks[i] = 0;
49 0 : }
50 :
51 0 : nsBaseScreen::~nsBaseScreen() { }
52 :
53 : NS_IMETHODIMP
54 0 : nsBaseScreen::LockMinimumBrightness(PRUint32 aBrightness)
55 : {
56 0 : NS_ABORT_IF_FALSE(
57 : aBrightness < nsIScreen::BRIGHTNESS_LEVELS,
58 : "Invalid brightness level to lock");
59 0 : mBrightnessLocks[aBrightness]++;
60 0 : NS_ABORT_IF_FALSE(mBrightnessLocks[aBrightness] > 0,
61 : "Overflow after locking brightness level");
62 :
63 0 : CheckMinimumBrightness();
64 :
65 0 : return NS_OK;
66 : }
67 :
68 : NS_IMETHODIMP
69 0 : nsBaseScreen::UnlockMinimumBrightness(PRUint32 aBrightness)
70 : {
71 0 : NS_ABORT_IF_FALSE(
72 : aBrightness < nsIScreen::BRIGHTNESS_LEVELS,
73 : "Invalid brightness level to lock");
74 0 : NS_ABORT_IF_FALSE(mBrightnessLocks[aBrightness] > 0,
75 : "Unlocking a brightness level with no corresponding lock");
76 0 : mBrightnessLocks[aBrightness]--;
77 :
78 0 : CheckMinimumBrightness();
79 :
80 0 : return NS_OK;
81 : }
82 :
83 : void
84 0 : nsBaseScreen::CheckMinimumBrightness()
85 : {
86 0 : PRUint32 brightness = nsIScreen::BRIGHTNESS_LEVELS;
87 0 : for (PRUint32 i = 0; i < nsIScreen::BRIGHTNESS_LEVELS; i++)
88 0 : if (mBrightnessLocks[i] > 0)
89 0 : brightness = i;
90 :
91 0 : ApplyMinimumBrightness(brightness);
92 0 : }
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