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/* $Id$ */
/***
This file is part of polypaudio.
polypaudio is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation; either version 2 of the License,
or (at your option) any later version.
polypaudio 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.
You should have received a copy of the GNU Lesser General Public License
along with polypaudio; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
#include <assert.h>
#include <stdio.h>
#include "llist.h"
#include "x11wrap.h"
#include "xmalloc.h"
#include "log.h"
#include "props.h"
typedef struct pa_x11_internal pa_x11_internal;
struct pa_x11_internal {
PA_LLIST_FIELDS(pa_x11_internal);
pa_x11_wrapper *wrapper;
pa_io_event* io_event;
int fd;
};
struct pa_x11_wrapper {
pa_core *core;
int ref;
char *property_name;
Display *display;
pa_defer_event* defer_event;
pa_io_event* io_event;
PA_LLIST_HEAD(pa_x11_client, clients);
PA_LLIST_HEAD(pa_x11_internal, internals);
};
struct pa_x11_client {
PA_LLIST_FIELDS(pa_x11_client);
pa_x11_wrapper *wrapper;
int (*callback)(pa_x11_wrapper *w, XEvent *e, void *userdata);
void *userdata;
};
/* Dispatch all pending X11 events */
static void work(pa_x11_wrapper *w) {
assert(w && w->ref >= 1);
while (XPending(w->display)) {
pa_x11_client *c;
XEvent e;
XNextEvent(w->display, &e);
for (c = w->clients; c; c = c->next) {
assert(c->callback);
if (c->callback(w, &e, c->userdata) != 0)
break;
}
}
}
/* IO notification event for the X11 display connection */
static void display_io_event(pa_mainloop_api *m, pa_io_event *e, int fd, PA_GCC_UNUSED pa_io_event_flags_t f, void *userdata) {
pa_x11_wrapper *w = userdata;
assert(m && e && fd >= 0 && w && w->ref >= 1);
work(w);
}
/* Deferred notification event. Called once each main loop iteration */
static void defer_event(pa_mainloop_api *m, pa_defer_event *e, void *userdata) {
pa_x11_wrapper *w = userdata;
assert(m && e && w && w->ref >= 1);
work(w);
}
/* IO notification event for X11 internal connections */
static void internal_io_event(pa_mainloop_api *m, pa_io_event *e, int fd, PA_GCC_UNUSED pa_io_event_flags_t f, void *userdata) {
pa_x11_wrapper *w = userdata;
assert(m && e && fd >= 0 && w && w->ref >= 1);
XProcessInternalConnection(w->display, fd);
}
/* Add a new IO source for the specified X11 internal connection */
static pa_x11_internal* x11_internal_add(pa_x11_wrapper *w, int fd) {
pa_x11_internal *i;
assert(i && fd >= 0);
i = pa_xmalloc(sizeof(pa_x11_internal));
i->wrapper = w;
i->io_event = w->core->mainloop->io_new(w->core->mainloop, fd, PA_IO_EVENT_INPUT, internal_io_event, w);
i->fd = fd;
PA_LLIST_PREPEND(pa_x11_internal, w->internals, i);
return i;
}
/* Remove an IO source for an X11 internal connection */
static void x11_internal_remove(pa_x11_wrapper *w, pa_x11_internal *i) {
assert(i);
PA_LLIST_REMOVE(pa_x11_internal, w->internals, i);
w->core->mainloop->io_free(i->io_event);
pa_xfree(i);
}
/* Implementation of XConnectionWatchProc */
static void x11_watch(Display *display, XPointer userdata, int fd, Bool opening, XPointer *watch_data) {
pa_x11_wrapper *w = (pa_x11_wrapper*) userdata;
assert(display && w && fd >= 0);
if (opening)
*watch_data = (XPointer) x11_internal_add(w, fd);
else
x11_internal_remove(w, (pa_x11_internal*) *watch_data);
}
static pa_x11_wrapper* x11_wrapper_new(pa_core *c, const char *name, const char *t) {
pa_x11_wrapper*w;
Display *d;
int r;
if (!(d = XOpenDisplay(name))) {
pa_log(__FILE__": XOpenDisplay() failed\n");
return NULL;
}
w = pa_xmalloc(sizeof(pa_x11_wrapper));
w->core = c;
w->ref = 1;
w->property_name = pa_xstrdup(t);
w->display = d;
PA_LLIST_HEAD_INIT(pa_x11_client, w->clients);
PA_LLIST_HEAD_INIT(pa_x11_internal, w->internals);
w->defer_event = c->mainloop->defer_new(c->mainloop, defer_event, w);
w->io_event = c->mainloop->io_new(c->mainloop, ConnectionNumber(d), PA_IO_EVENT_INPUT, display_io_event, w);
XAddConnectionWatch(d, x11_watch, (XPointer) w);
r = pa_property_set(c, w->property_name, w);
assert(r >= 0);
return w;
}
static void x11_wrapper_free(pa_x11_wrapper*w) {
int r;
assert(w);
r = pa_property_remove(w->core, w->property_name);
assert(r >= 0);
assert(!w->clients);
XRemoveConnectionWatch(w->display, x11_watch, (XPointer) w);
XCloseDisplay(w->display);
w->core->mainloop->io_free(w->io_event);
w->core->mainloop->defer_free(w->defer_event);
while (w->internals)
x11_internal_remove(w, w->internals);
pa_xfree(w->property_name);
pa_xfree(w);
}
pa_x11_wrapper* pa_x11_wrapper_get(pa_core *c, const char *name) {
char t[256];
pa_x11_wrapper *w;
assert(c);
snprintf(t, sizeof(t), "x11-wrapper%s%s", name ? "-" : "", name ? name : "");
if ((w = pa_property_get(c, t)))
return pa_x11_wrapper_ref(w);
return x11_wrapper_new(c, name, t);
}
pa_x11_wrapper* pa_x11_wrapper_ref(pa_x11_wrapper *w) {
assert(w && w->ref >= 1);
w->ref++;
return w;
}
void pa_x11_wrapper_unref(pa_x11_wrapper* w) {
assert(w && w->ref >= 1);
if (!(--w->ref))
x11_wrapper_free(w);
}
Display *pa_x11_wrapper_get_display(pa_x11_wrapper *w) {
assert(w && w->ref >= 1);
return w->display;
}
pa_x11_client* pa_x11_client_new(pa_x11_wrapper *w, int (*cb)(pa_x11_wrapper *w, XEvent *e, void *userdata), void *userdata) {
pa_x11_client *c;
assert(w && w->ref >= 1);
c = pa_xmalloc(sizeof(pa_x11_client));
c->wrapper = w;
c->callback = cb;
c->userdata = userdata;
PA_LLIST_PREPEND(pa_x11_client, w->clients, c);
return c;
}
void pa_x11_client_free(pa_x11_client *c) {
assert(c && c->wrapper && c->wrapper->ref >= 1);
PA_LLIST_REMOVE(pa_x11_client, c->wrapper->clients, c);
pa_xfree(c);
}
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