X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~mdw/git/disorder/blobdiff_plain/1f868ca317a161c7b754dc2d80b3be49eddafb23..983196fb899e3c882ec1dc8bee52cd9e9f9e4b8d:/disobedience/log.c

diff --git a/disobedience/log.c b/disobedience/log.c
index 38d83f0..f0ea7d1 100644
--- a/disobedience/log.c
+++ b/disobedience/log.c
@@ -60,27 +60,6 @@ const disorder_eclient_log_callbacks log_callbacks = {
   log_rescanned
 };
 
-/** @brief State monitor
- *
- * We keep a linked list of everything that is interested in state changes.
- */
-struct monitor {
-  /** @brief Next monitor */
-  struct monitor *next;
-
-  /** @brief State bits of interest */
-  unsigned long mask;
-
-  /** @brief Function to call if any of @c mask change */
-  monitor_callback *callback;
-
-  /** @brief User data for callback */
-  void *u;
-};
-
-/** @brief List of monitors */
-static struct monitor *monitors;
-
 /** @brief Update everything */
 void all_update(void) {
   ++suppress_actions;
@@ -96,8 +75,6 @@ void all_update(void) {
  * Depending on server and network state the TCP connection to the server may
  * go up or down many times during the lifetime of Disobedience.  This function
  * is called whenever it connects.
- *
- * The intent is to use the monitor logic to achieve this in future.
  */
 static void log_connected(void attribute((unused)) *v) {
   /* Don't know what we might have missed while disconnected so update
@@ -162,10 +139,21 @@ static void log_scratched(void attribute((unused)) *v,
                           const char attribute((unused)) *user) {
 }
 
+/** @brief Map from state bits to state change events */
+static const struct {
+  unsigned long bit;
+  const char *event;
+} state_events[] = {
+  { DISORDER_PLAYING_ENABLED, "enabled-changed" },
+  { DISORDER_RANDOM_ENABLED, "random-changed" },
+  { DISORDER_TRACK_PAUSED, "pause-changed" },
+  { DISORDER_PLAYING, "playing-changed" },
+};
+#define NSTATE_EVENTS (sizeof state_events / sizeof *state_events)
+
 /** @brief Called when a state change occurs */
 static void log_state(void attribute((unused)) *v,
                       unsigned long state) {
-  const struct monitor *m;
   unsigned long changes = state ^ last_state;
   static int first = 1;
 
@@ -179,11 +167,10 @@ static void log_state(void attribute((unused)) *v,
      disorder_eclient_interpret_state(state),
      disorder_eclient_interpret_state(changes)));
   last_state = state;
-  /* Tell anything that cares about the state change */
-  for(m = monitors; m; m = m->next) {
-    if(changes & m->mask)
-      m->callback(m->u);
-  }
+  /* Notify interested parties what has changed */
+  for(unsigned n = 0; n < NSTATE_EVENTS; ++n)
+    if(changes & state_events[n].bit)
+      event_raise(state_events[n].event, 0);
   --suppress_actions;
 }
 
@@ -204,25 +191,6 @@ static void log_rescanned(void attribute((unused)) *v) {
   event_raise("added-changed", 0);
 }
 
-/** @brief Add a monitor to the list
- * @param callback Function to call
- * @param u User data to pass to @p callback
- * @param mask Mask of flags that @p callback cares about
- *
- * Pass @p mask as -1UL to match all flags.
- */
-void register_monitor(monitor_callback *callback,
-                      void *u,
-                      unsigned long mask) {
-  struct monitor *m = xmalloc(sizeof *m);
-
-  m->next = monitors;
-  m->mask = mask;
-  m->callback = callback;
-  m->u = u;
-  monitors = m;
-}
-
 /*
 Local Variables:
 c-basic-offset:2