| /* |
| * BRLTTY - A background process providing access to the console screen (when in |
| * text mode) for a blind person using a refreshable braille display. |
| * |
| * Copyright (C) 1995-2023 by The BRLTTY Developers. |
| * |
| * BRLTTY comes with ABSOLUTELY NO WARRANTY. |
| * |
| * This is free software, placed under the terms of the |
| * GNU Lesser General Public License, as published by the Free Software |
| * Foundation; either version 2.1 of the License, or (at your option) any |
| * later version. Please see the file LICENSE-LGPL for details. |
| * |
| * Web Page: http://brltty.app/ |
| * |
| * This software is maintained by Dave Mielke <dave@mielke.cc>. |
| */ |
| |
| #include "prologue.h" |
| |
| #include "bell.h" |
| |
| #ifdef HAVE_LINUX_INPUT_H |
| #include <linux/input.h> |
| |
| #include "system_linux.h" |
| |
| static InputEventMonitor *inputEventMonitor = NULL; |
| |
| static int |
| prepareUinputObject (UinputObject *uinput) { |
| if (!enableUinputEventType(uinput, EV_SND)) return 0; |
| if (!enableUinputSound(uinput, SND_BELL)) return 0; |
| return 1; |
| } |
| |
| static void |
| handleInputEvent (const InputEvent *event) { |
| switch (event->type) { |
| case EV_SND: { |
| int value = event->value; |
| |
| switch (event->code) { |
| case SND_BELL: |
| if (value) alertConsoleBell(); |
| break; |
| |
| default: |
| break; |
| } |
| |
| break; |
| } |
| |
| default: |
| break; |
| } |
| } |
| |
| int |
| canMonitorConsoleBell (void) { |
| return 1; |
| } |
| |
| int |
| startMonitoringConsoleBell (void) { |
| if (!inputEventMonitor) { |
| InputEventMonitor *monitor = newInputEventMonitor( |
| "Console Bell Monitor", prepareUinputObject, handleInputEvent |
| ); |
| |
| if (!monitor) return 0; |
| inputEventMonitor = monitor; |
| } |
| |
| return 1; |
| } |
| |
| void |
| stopMonitoringConsoleBell (void) { |
| if (inputEventMonitor) { |
| destroyInputEventMonitor(inputEventMonitor); |
| inputEventMonitor = NULL; |
| } |
| } |
| |
| #else /* HAVE_LINUX_INPUT_H */ |
| int |
| canMonitorConsoleBell (void) { |
| return 0; |
| } |
| |
| int |
| startMonitoringConsoleBell (void) { |
| return 0; |
| } |
| |
| void |
| stopMonitoringConsoleBell (void) { |
| } |
| #endif /* HAVE_LINUX_INPUT_H */ |