added expando_get_signals() and special_vars_get_signals() to return list

of signals the expandos use. Also added "time changed" signal which gets
emitted when $Z changes.


git-svn-id: http://svn.irssi.org/repos/irssi/trunk@1814 dbcabf3a-b0e7-0310-adc4-f8d773084564

src/core/expandos.c

@@ -54,7 +54,10 @@ static time_t client_start_time;
 static char *last_sent_msg, *last_sent_msg_body;
 static char *last_privmsg_from, *last_public_from;
 static char *sysname, *sysrelease, *sysarch;
+
 static const char *timestamp_format;
+static int timestamp_seconds;
+static time_t last_timestamp;
 
 #define CHAR_EXPANDO(chr) \
 	(char_expandos[(int) (unsigned char) chr])
@@ -209,6 +212,38 @@ void expando_unbind(const char *key, int funccount, SIGNAL_FUNC *funcs)
 	}
 }
 
+/* Returns [<signal id>, EXPANDO_ARG_xxx, <signal id>, ..., -1] */
+int *expando_get_signals(const char *key)
+{
+	EXPANDO_REC *rec;
+	int *signals;
+        int n;
+
+	g_return_val_if_fail(key != NULL, NULL);
+
+	rec = expando_find(key);
+	if (rec == NULL || rec->signals < 0)
+                return NULL;
+
+	if (rec->signals == 0) {
+		/* it's unknown when this expando changes..
+		   check it once in a second */
+		signals = g_new(int, 3);
+		signals[0] = signal_get_uniq_id("expando timer");
+		signals[1] = EXPANDO_ARG_NONE;
+		signals[2] = -1;
+                return signals;
+	}
+
+        signals = g_new(int, rec->signals*2+1);
+	for (n = 0; n < rec->signals; n++) {
+                signals[n*2] = rec->signal_ids[n];
+                signals[n*2+1] = rec->signal_args[n];
+	}
+	signals[rec->signals*2] = -1;
+        return signals;
+}
+
 EXPANDO_FUNC expando_find_char(char chr)
 {
 	return CHAR_EXPANDO(chr) == NULL ? NULL :
@@ -437,13 +472,41 @@ static void sig_message_own_private(SERVER_REC *server, const char *msg,
 
 static int sig_timer(void)
 {
+	time_t now;
+	struct tm *tm;
+        int last_min;
+
         signal_emit("expando timer", 0);
+
+        /* check if $Z has changed */
+	now = time(NULL);
+	if (last_timestamp != now) {
+		if (!timestamp_seconds) {
+                        /* assume it changes every minute */
+			tm = localtime(&last_timestamp);
+			last_min = tm->tm_min;
+
+			tm = localtime(&now);
+			if (tm->tm_min == last_min)
+                                return 1;
+		}
+
+                signal_emit("time changed", 0);
+		last_timestamp = now;
+	}
+
         return 1;
 }
 
 static void read_settings(void)
 {
-        timestamp_format = settings_get_str("timestamp_format");
+	timestamp_format = settings_get_str("timestamp_format");
+	timestamp_seconds =
+		strstr(timestamp_format, "%r") != NULL ||
+		strstr(timestamp_format, "%s") != NULL ||
+		strstr(timestamp_format, "%S") != NULL ||
+		strstr(timestamp_format, "%T") != NULL;
+
 }
 
 void expandos_init(void)
@@ -457,6 +520,7 @@ void expandos_init(void)
 	client_start_time = time(NULL);
 	last_sent_msg = NULL; last_sent_msg_body = NULL;
 	last_privmsg_from = NULL; last_public_from = NULL;
+        last_timestamp = 0;
 
         sysname = sysrelease = sysarch = NULL;
 #ifdef HAVE_SYS_UTSNAME_H
@@ -523,7 +587,8 @@ void expandos_init(void)
 	expando_create("Y", expando_realname,
 		       "window changed", EXPANDO_ARG_NONE,
 		       "window server changed", EXPANDO_ARG_WINDOW, NULL);
-	expando_create("Z", expando_time, NULL);
+	expando_create("Z", expando_time,
+		       "time changed", EXPANDO_ARG_NONE, NULL);
 	expando_create("$", expando_dollar,
 		       "", EXPANDO_NEVER, NULL);
 

src/core/expandos.h

@@ -5,7 +5,7 @@
 
 /* first argument of signal must match to active .. */
 typedef enum {
-        EXPANDO_ARG_NONE,
+        EXPANDO_ARG_NONE = 1,
         EXPANDO_ARG_SERVER,
         EXPANDO_ARG_WINDOW,
 	EXPANDO_ARG_WINDOW_ITEM,
@@ -28,6 +28,9 @@ void expando_destroy(const char *key, EXPANDO_FUNC func);
 void expando_bind(const char *key, int funccount, SIGNAL_FUNC *funcs);
 void expando_unbind(const char *key, int funccount, SIGNAL_FUNC *funcs);
 
+/* Returns [<signal id>, EXPANDO_ARG_xxx, <signal id>, ..., -1] */
+int *expando_get_signals(const char *key);
+
 /* internal: */
 EXPANDO_FUNC expando_find_char(char chr);
 EXPANDO_FUNC expando_find_long(const char *key);

src/core/special-vars.c

@@ -597,41 +597,126 @@ void special_history_func_set(SPECIAL_HISTORY_FUNC func)
 	history_func = func;
 }
 
-static void special_vars_signals_do(const char *text, int funccount,
+static void update_signals_hash(GHashTable **hash, int *signals)
-				    SIGNAL_FUNC *funcs, int bind)
 {
-	char *ret;
+	void *signal_id;
-        int need_free;
+        int arg_type;
 
+	if (*hash == NULL) {
+		*hash = g_hash_table_new((GHashFunc) g_direct_hash,
+					 (GCompareFunc) g_direct_equal);
+	}
+
+	while (*signals != -1) {
+                signal_id = GINT_TO_POINTER(*signals);
+		arg_type = GPOINTER_TO_INT(g_hash_table_lookup(*hash, signal_id));
+		if (arg_type != 0 && arg_type != signals[1]) {
+			/* same signal is used for different purposes ..
+			   not sure if this should ever happen, but change
+			   the argument type to none so it will at least
+			   work. */
+			arg_type = EXPANDO_ARG_NONE;
+		}
+
+		if (arg_type == 0) arg_type = signals[1];
+		g_hash_table_insert(*hash, signal_id,
+				    GINT_TO_POINTER(arg_type));
+		signals += 2;
+	}
+}
+
+static void get_signal_hash(void *signal_id, void *arg_type, int **pos)
+{
+	(*pos)[0] = GPOINTER_TO_INT(signal_id);
+        (*pos)[1] = GPOINTER_TO_INT(arg_type);
+        (*pos) += 2;
+}
+
+static int *get_signals_list(GHashTable *hash)
+{
+	int *signals, *pos;
+
+	if (hash == NULL) {
+		/* no expandos in text - never needs updating */
+		return NULL;
+	}
+
+        pos = signals = g_new(int, g_hash_table_size(hash)*2 + 1);
+	g_hash_table_foreach(hash, (GHFunc) get_signal_hash, &pos);
+        *pos = -1;
+
+	g_hash_table_destroy(hash);
+        return signals;
+
+}
+
+#define TASK_BIND		1
+#define TASK_UNBIND		2
+#define TASK_GET_SIGNALS	3
+
+static int *special_vars_signals_task(const char *text, int funccount,
+				      SIGNAL_FUNC *funcs, int task)
+{
+        GHashTable *signals;
+	char *expando;
+	int need_free, *expando_signals;
+
+        signals = NULL;
 	while (*text != '\0') {
 		if (*text == '\\' && text[1] != '\0') {
+                        /* escape */
 			text += 2;
 		} else if (*text == '$' && text[1] != '\0') {
+                        /* expando */
 			text++;
-			ret = parse_special((char **) &text, NULL, NULL,
+			expando = parse_special((char **) &text, NULL, NULL,
-					    NULL, &need_free, NULL,
+						NULL, &need_free, NULL,
-					    PARSE_FLAG_GETNAME);
+						PARSE_FLAG_GETNAME);
-			if (ret != NULL) {
+			if (expando == NULL)
-                                if (bind)
+				continue;
-					expando_bind(ret, funccount, funcs);
-                                else
-					expando_unbind(ret, funccount, funcs);
-				if (need_free) g_free(ret);
-			}
 
+			switch (task) {
+			case TASK_BIND:
+				expando_bind(expando, funccount, funcs);
+				break;
+			case TASK_UNBIND:
+				expando_unbind(expando, funccount, funcs);
+				break;
+			case TASK_GET_SIGNALS:
+				expando_signals = expando_get_signals(expando);
+				if (expando_signals != NULL) {
+					update_signals_hash(&signals,
+							    expando_signals);
+                                        g_free(expando_signals);
+				}
+				break;
+			}
+			if (need_free) g_free(expando);
+		} else {
+                        /* just a char */
+			text++;
 		}
-                else text++;
 	}
+
+	if (task == TASK_GET_SIGNALS)
+                return get_signals_list(signals);
+
+        return NULL;
 }
 
 void special_vars_add_signals(const char *text,
 			      int funccount, SIGNAL_FUNC *funcs)
 {
-        special_vars_signals_do(text, funccount, funcs, TRUE);
+        special_vars_signals_task(text, funccount, funcs, TASK_BIND);
 }
 
 void special_vars_remove_signals(const char *text,
 				 int funccount, SIGNAL_FUNC *funcs)
 {
-        special_vars_signals_do(text, funccount, funcs, FALSE);
+        special_vars_signals_task(text, funccount, funcs, TASK_UNBIND);
+}
+
+int *special_vars_get_signals(const char *text)
+{
+	return special_vars_signals_task(text, 0, NULL, TASK_GET_SIGNALS);
 }

src/core/special-vars.h

@@ -31,5 +31,7 @@ void special_vars_add_signals(const char *text,
 			      int funccount, SIGNAL_FUNC *funcs);
 void special_vars_remove_signals(const char *text,
 				 int funccount, SIGNAL_FUNC *funcs);
+/* Returns [<signal id>, EXPANDO_ARG_xxx, <signal id>, ..., -1] */
+int *special_vars_get_signals(const char *text);
 
 #endif