/*
* Copyright (c) 2024 Jiri Svoboda
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/** @addtogroup display
* @{
*/
/** @file Input event queue
*/
#include <adt/list.h>
#include <errno.h>
#include <fibril_synch.h>
#include <io/kbd_event.h>
#include <stdlib.h>
#include "display.h"
#include "ievent.h"
/** Post keyboard event to input event queue.
*
* @param disp Display
* @param kbd Keyboard event
*
* @return EOK on success or an error code
*/
errno_t ds_ievent_post_kbd(ds_display_t *disp, kbd_event_t *kbd)
{
ds_ievent_t *ievent;
ievent = calloc(1, sizeof(ds_ievent_t));
if (ievent == NULL)
return ENOMEM;
ievent->display = disp;
ievent->etype = det_kbd;
ievent->ev.kbd = *kbd;
list_append(&ievent->lievents, &disp->ievents);
fibril_condvar_signal(&disp->ievent_cv);
return EOK;
}
/** Post pointing device event to input event queue.
*
* @param disp Display
* @param kbd Keyboard event
*
* @return EOK on success or an error code
*/
errno_t ds_ievent_post_ptd(ds_display_t *disp, ptd_event_t *ptd)
{
ds_ievent_t *ievent;
ds_ievent_t *prev;
link_t *link;
ievent = calloc(1, sizeof(ds_ievent_t));
if (ievent == NULL)
return ENOMEM;
link = list_last(&disp->ievents);
if (link != NULL) {
prev = list_get_instance(link, ds_ievent_t, lievents);
if (prev->etype == det_ptd && prev->ev.ptd.pos_id ==
ptd->pos_id) {
/*
* Previous event is also a pointing device event
* and it is from the same device.
*/
if (prev->ev.ptd.type == PTD_MOVE &&
ptd->type == PTD_MOVE) {
/* Both events are relative move events */
gfx_coord2_add(&ptd->dmove, &prev->ev.ptd.dmove,
&prev->ev.ptd.dmove);
return EOK;
} else if (prev->ev.ptd.type == PTD_ABS_MOVE &&
ptd->type == PTD_ABS_MOVE) {
/* Both events are absolute move events */
prev->ev.ptd.apos = ptd->apos;
prev->ev.ptd.abounds = ptd->abounds;
return EOK;
}
}
}
ievent->display = disp;
ievent->etype = det_ptd;
ievent->ev.ptd = *ptd;
list_append(&ievent->lievents, &disp->ievents);
fibril_condvar_signal(&disp->ievent_cv);
return EOK;
}
/** Input event processing fibril.
*
* @param arg Argument (ds_display_t *)
* @return EOK success
*/
static errno_t ds_ievent_fibril(void *arg)
{
ds_display_t *disp = (ds_display_t *)arg;
ds_ievent_t *ievent;
link_t *link;
fibril_mutex_lock(&disp->lock);
while (!disp->ievent_quit) {
while (list_empty(&disp->ievents))
fibril_condvar_wait(&disp->ievent_cv, &disp->lock);
link = list_first(&disp->ievents);
assert(link != NULL);
list_remove(link);
ievent = list_get_instance(link, ds_ievent_t, lievents);
switch (ievent->etype) {
case det_kbd:
(void)ds_display_post_kbd_event(disp, &ievent->ev.kbd);
break;
case det_ptd:
(void)ds_display_post_ptd_event(disp, &ievent->ev.ptd);
break;
}
}
/* Signal to ds_ievent_fini() that the event processing fibril quit */
disp->ievent_done = true;
fibril_condvar_signal(&disp->ievent_cv);
fibril_mutex_unlock(&disp->lock);
return EOK;
}
/** Initialize input event processing.
*
* @param disp Display
* @return EOK on success or an error code
*/
errno_t ds_ievent_init(ds_display_t *disp)
{
assert(disp->ievent_fid == 0);
disp->ievent_fid = fibril_create(ds_ievent_fibril, (void *)disp);
if (disp->ievent_fid == 0)
return ENOMEM;
fibril_add_ready(disp->ievent_fid);
return EOK;
}
/** Deinitialize input event processing.
*
* @param disp Display
*/
void ds_ievent_fini(ds_display_t *disp)
{
ds_ievent_t *ievent;
link_t *link;
if (disp->ievent_fid == 0)
return;
/* Signal event processing fibril to quit. */
fibril_mutex_lock(&disp->lock);
disp->ievent_quit = true;
fibril_condvar_signal(&disp->ievent_cv);
/* Wait for event processing fibril to quit. */
while (!disp->ievent_done)
fibril_condvar_wait(&disp->ievent_cv, &disp->lock);
/* Remove all events from the queue. */
while (!list_empty(&disp->ievents)) {
link = list_first(&disp->ievents);
assert(link != NULL);
list_remove(link);
ievent = list_get_instance(link, ds_ievent_t, lievents);
free(ievent);
}
fibril_mutex_unlock(&disp->lock);
fibril_detach(disp->ievent_fid);
disp->ievent_fid = 0;
}
/** @}
*/