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/* Copyright (C) 2010 The Android Open Source Project
**
** This software is licensed under the terms of the GNU General Public
** License version 2, as published by the Free Software Foundation, and
** may be copied, distributed, and modified under those terms.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
*/
#include "user-events.h"
#include "android/globals.h"
#include "android/android.h"
#include "android/looper.h"
#include "android/async-utils.h"
#include "android/utils/system.h"
#include "android/utils/debug.h"
#include "android/user-events-common.h"
#include "android/user-events-core.h"
#include "android/sync-utils.h"
/* States of the core user events service.
*/
/* Event header is expected in the pipe. */
#define UE_STATE_EVENT_HEADER 0
/* Event parameters are expected in the pipe. */
#define UE_STATE_EVENT_PARAM 1
/* Core user events service descriptor. */
struct CoreUserEvents {
/* Reader to receive user events. */
AsyncReader user_events_reader;
/* I/O associated with this descriptor. */
LoopIo io;
/* Looper used to communicate user events. */
Looper* looper;
/* Socket for this service. */
int sock;
/* State of the service (see UE_STATE_XXX for possible values). */
int state;
/* Current event header. */
UserEventHeader event_header;
/* Current event parameters. */
union {
UserEventGeneric generic_event;
UserEventMouse mouse_event;
UserEventKeycode keycode_event;
};
};
/* Implemented in android/console.c */
extern void destroy_control_ue_client(void);
/*
* Asynchronous I/O callback launched when reading user events from the socket.
* Param:
* opaque - CoreUserEvents instance.
*/
static void
coreue_io_func(void* opaque, int fd, unsigned events)
{
CoreUserEvents* ue = opaque;
// Read whatever is expected from the socket.
const AsyncStatus status = asyncReader_read(&ue->user_events_reader, &ue->io);
switch (status) {
case ASYNC_COMPLETE:
switch (ue->state) {
case UE_STATE_EVENT_HEADER:
// We just read event header. Now we expect event parameters.
ue->state = UE_STATE_EVENT_PARAM;
// Setup the reader depending on the event type.
switch (ue->event_header.event_type) {
case AUSER_EVENT_MOUSE:
asyncReader_init(&ue->user_events_reader,
&ue->mouse_event,
sizeof(ue->mouse_event),
&ue->io);
break;
case AUSER_EVENT_KEYCODE:
asyncReader_init(&ue->user_events_reader,
&ue->keycode_event,
sizeof(ue->keycode_event),
&ue->io);
break;
case AUSER_EVENT_GENERIC:
asyncReader_init(&ue->user_events_reader,
&ue->generic_event,
sizeof(ue->generic_event),
&ue->io);
break;
default:
derror("Unexpected event type %d\n",
ue->event_header.event_type);
break;
}
break;
case UE_STATE_EVENT_PARAM:
// We just read event parameters. Lets fire the event.
switch (ue->event_header.event_type) {
case AUSER_EVENT_MOUSE:
user_event_mouse(ue->mouse_event.dx,
ue->mouse_event.dy,
ue->mouse_event.dz,
ue->mouse_event.buttons_state);
break;
case AUSER_EVENT_KEYCODE:
user_event_keycode(ue->keycode_event.keycode);
break;
case AUSER_EVENT_GENERIC:
user_event_generic(ue->generic_event.type,
ue->generic_event.code,
ue->generic_event.value);
break;
default:
derror("Unexpected event type %d\n",
ue->event_header.event_type);
break;
}
// Now we expect event header.
ue->event_header.event_type = -1;
ue->state = UE_STATE_EVENT_HEADER;
asyncReader_init(&ue->user_events_reader, &ue->event_header,
sizeof(ue->event_header), &ue->io);
break;
}
break;
case ASYNC_ERROR:
loopIo_dontWantRead(&ue->io);
if (errno == ECONNRESET) {
// UI has exited. We need to destroy user event service.
destroy_control_ue_client();
}
break;
case ASYNC_NEED_MORE:
// Transfer will eventually come back into this routine.
return;
}
}
CoreUserEvents*
coreue_create(int fd)
{
CoreUserEvents* ue;
ANEW0(ue);
ue->sock = fd;
ue->state = UE_STATE_EVENT_HEADER;
ue->looper = looper_newCore();
loopIo_init(&ue->io, ue->looper, ue->sock, coreue_io_func, ue);
asyncReader_init(&ue->user_events_reader, &ue->event_header,
sizeof(ue->event_header), &ue->io);
return ue;
}
void
coreue_destroy(CoreUserEvents* ue)
{
if (ue != NULL) {
if (ue->looper != NULL) {
// Stop all I/O that may still be going on.
loopIo_done(&ue->io);
looper_free(ue->looper);
ue->looper = NULL;
}
free(ue);
}
}
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