1 files changed, 145 insertions, 0 deletions
diff --git a/src/pulsecore/x11prop.c b/src/pulsecore/x11prop.c
new file mode 100644
index 0000000..f3f7737
--- /dev/null
+++ b/src/pulsecore/x11prop.c
@@ -0,0 +1,145 @@
+/***
+  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;
+}