X-Git-Url: https://git.notmuchmail.org/git?p=notmuch;a=blobdiff_plain;f=lib%2Fmessages.c;h=aa92535fa26ff3c3c750af43a5a2aab5aad543c4;hp=2f7c283ecbb220a3fcf6dca033efced805791335;hb=28ce73848d98d8ee2b661733402e2c10b13418d5;hpb=64c03ae97f2f5294c60ef25d7f41849864e6ebd3

diff --git a/lib/messages.c b/lib/messages.c
index 2f7c283e..aa92535f 100644
--- a/lib/messages.c
+++ b/lib/messages.c
@@ -20,12 +20,7 @@
 
 #include "notmuch-private.h"
 
-#include <glib.h> /* GList */
-
-
-struct _notmuch_messages {
-    notmuch_message_node_t *iterator;
-};
+#include <glib.h>
 
 /* Create a new notmuch_message_list_t object, with 'ctx' as its
  * talloc owner.
@@ -85,20 +80,45 @@ _notmuch_messages_create (notmuch_message_list_t *list)
     if (unlikely (messages == NULL))
 	return NULL;
 
+    messages->is_of_list_type = TRUE;
     messages->iterator = list->head;
 
     return messages;
 }
 
+/* We're using the "is_of_type_list" to conditionally defer to the
+ * notmuch_mset_messages_t implementation of notmuch_messages_t in
+ * query.cc. It's ugly that that's over in query.cc, and it's ugly
+ * that we're not using a union here. Both of those uglies are due to
+ * C++:
+ *
+ *	1. I didn't want to force a C++ header file onto
+ *	   notmuch-private.h and suddenly subject all our code to a
+ *	   C++ compiler and its rules.
+ *
+ *	2. C++ won't allow me to put C++ objects, (with non-trivial
+ *	   constructors) into a union anyway. Even though I'd
+ *	   carefully control object construction with placement new
+ *	   anyway. *sigh*
+ */
 notmuch_bool_t
 notmuch_messages_has_more (notmuch_messages_t *messages)
 {
-    return (messages != NULL && messages->iterator != NULL);
+    if (messages == NULL)
+	return FALSE;
+
+    if (! messages->is_of_list_type)
+	return _notmuch_mset_messages_has_more (messages);
+
+    return (messages->iterator != NULL);
 }
 
 notmuch_message_t *
 notmuch_messages_get (notmuch_messages_t *messages)
 {
+    if (! messages->is_of_list_type)
+	return _notmuch_mset_messages_get (messages);
+
     if (messages->iterator == NULL)
 	return NULL;
 
@@ -108,6 +128,9 @@ notmuch_messages_get (notmuch_messages_t *messages)
 void
 notmuch_messages_advance (notmuch_messages_t *messages)
 {
+    if (! messages->is_of_list_type)
+	return _notmuch_mset_messages_advance (messages);
+
     if (messages->iterator == NULL)
 	return;
 
@@ -119,3 +142,41 @@ notmuch_messages_destroy (notmuch_messages_t *messages)
 {
     talloc_free (messages);
 }
+
+
+notmuch_tags_t *
+notmuch_messages_collect_tags (notmuch_messages_t *messages)
+{
+    notmuch_tags_t *tags, *msg_tags;
+    notmuch_message_t *msg;
+    GHashTable *htable;
+    GList *keys, *l;
+    const char *tag;
+
+    tags = _notmuch_tags_create (messages);
+    if (tags == NULL) return NULL;
+
+    htable = g_hash_table_new_full (g_str_hash, g_str_equal, free, NULL);
+
+    while ((msg = notmuch_messages_get (messages))) {
+	msg_tags = notmuch_message_get_tags (msg);
+	while ((tag = notmuch_tags_get (msg_tags))) {
+	    g_hash_table_insert (htable, xstrdup (tag), NULL);
+	    notmuch_tags_advance (msg_tags);
+	}
+	notmuch_tags_destroy (msg_tags);
+	notmuch_message_destroy (msg);
+	notmuch_messages_advance (messages);
+    }
+
+    keys = g_hash_table_get_keys (htable);
+    for (l = keys; l; l = l->next) {
+	_notmuch_tags_add_tag (tags, (char *)l->data);
+    }
+
+    g_list_free (keys);
+    g_hash_table_destroy (htable);
+
+    _notmuch_tags_prepare_iterator (tags);
+    return tags;
+}