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/***
This file is part of PulseAudio.
Copyright 2004-2006 Lennart Poettering
PulseAudio 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 2.1 of the License,
or (at your option) any later version.
PulseAudio 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 PulseAudio; if not, see <http://www.gnu.org/licenses/>.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <string.h>
#include "x11prop.h"
#include <pulsecore/macro.h>
#include <xcb/xproto.h>
#define PA_XCB_FORMAT 8
static xcb_screen_t *screen_of_display(xcb_connection_t *xcb, int screen) {
const xcb_setup_t *s;
xcb_screen_iterator_t iter;
if ((s = xcb_get_setup(xcb))) {
iter = xcb_setup_roots_iterator(s);
for (; iter.rem; --screen, xcb_screen_next(&iter))
if (0 == screen)
return iter.data;
}
return NULL;
}
void pa_x11_set_prop(xcb_connection_t *xcb, int screen, const char *name, const char *data) {
xcb_screen_t *xs;
xcb_intern_atom_reply_t *reply;
pa_assert(xcb);
pa_assert(name);
pa_assert(data);
if ((xs = screen_of_display(xcb, screen))) {
reply = xcb_intern_atom_reply(xcb,
xcb_intern_atom(xcb, 0, strlen(name), name),
NULL);
if (reply) {
xcb_change_property(xcb, XCB_PROP_MODE_REPLACE, xs->root, reply->atom,
XCB_ATOM_STRING, PA_XCB_FORMAT,
(int) strlen(data), (const void*) data);
free(reply);
}
}
}
void pa_x11_del_prop(xcb_connection_t *xcb, int screen, const char *name) {
xcb_screen_t *xs;
xcb_intern_atom_reply_t *reply;
pa_assert(xcb);
pa_assert(name);
if ((xs = screen_of_display(xcb, screen))) {
reply = xcb_intern_atom_reply(xcb,
xcb_intern_atom(xcb, 0, strlen(name), name),
NULL);
if (reply) {
xcb_delete_property(xcb, xs->root, reply->atom);
free(reply);
}
}
}
char* pa_x11_get_prop(xcb_connection_t *xcb, int screen, const char *name, char *p, size_t l) {
char *ret = NULL;
int len;
xcb_get_property_cookie_t req;
xcb_get_property_reply_t* prop = NULL;
xcb_screen_t *xs;
xcb_intern_atom_reply_t *reply;
pa_assert(xcb);
pa_assert(name);
pa_assert(p);
xs = screen_of_display(xcb, screen);
/*
* Also try and get the settings from the first screen.
* This allows for e.g. a Media Center to run on screen 1 (e.g. HDMI) and have
* different defaults (e.g. prefer the HDMI sink) than the primary screen 0
* which uses the Internal Audio sink.
*/
if (!xs && 0 != screen)
xs = screen_of_display(xcb, 0);
if (xs) {
reply = xcb_intern_atom_reply(xcb,
xcb_intern_atom(xcb, 0, strlen(name), name),
NULL);
if (!reply)
goto finish;
req = xcb_get_property(xcb, 0, xs->root, reply->atom, XCB_ATOM_STRING, 0, (uint32_t)(l-1));
free(reply);
prop = xcb_get_property_reply(xcb, req, NULL);
if (!prop)
goto finish;
if (PA_XCB_FORMAT != prop->format)
goto finish;
len = xcb_get_property_value_length(prop);
if (len < 1 || len >= (int)l)
goto finish;
memcpy(p, xcb_get_property_value(prop), len);
p[len] = 0;
ret = p;
}
finish:
if (prop)
free(prop);
return ret;
}
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