X-Git-Url: https://git.notmuchmail.org/git?p=notmuch;a=blobdiff_plain;f=lib%2Fmessages.c;h=0eee5690d7feae1380aad512ede8110333d8f2b6;hp=8b627750b5838a90abc31fe26b055b77df1f6c68;hb=59823f964250be6d0ddbdfc45d4b07803bab267d;hpb=d3349358c6a5048559bd2a4faebe476ebd222170

diff --git a/lib/messages.c b/lib/messages.c
index 8b627750..0eee5690 100644
--- a/lib/messages.c
+++ b/lib/messages.c
@@ -20,74 +20,111 @@
 
 #include "notmuch-private.h"
 
-#include <glib.h> /* GList */
+#include <glib.h>
 
-typedef struct _message_list {
-    notmuch_message_t *message;
-    struct _message_list *next;
-} message_list_t;
-
-struct _notmuch_messages {
-    message_list_t *head;
-    message_list_t **tail;
-};
-
-/* Create a new notmuch_messages_t object, with 'ctx' as its talloc owner.
+/* Create a new notmuch_message_list_t object, with 'ctx' as its
+ * talloc owner.
  *
  * This function can return NULL in case of out-of-memory.
  */
-notmuch_messages_t *
-_notmuch_messages_create (void *ctx)
+notmuch_message_list_t *
+_notmuch_message_list_create (const void *ctx)
 {
-    notmuch_messages_t *messages;
+    notmuch_message_list_t *list;
 
-    messages = talloc (ctx, notmuch_messages_t);
-    if (unlikely (messages == NULL))
+    list = talloc (ctx, notmuch_message_list_t);
+    if (unlikely (list == NULL))
 	return NULL;
 
-    messages->head = NULL;
-    messages->tail = &messages->head;
+    list->head = NULL;
+    list->tail = &list->head;
 
-    return messages;
+    return list;
 }
 
-/* Add a new message to 'messages'.
- */
+/* Append 'message' to the end of 'list'. */
 void
-_notmuch_messages_add_message (notmuch_messages_t *messages,
-			       notmuch_message_t *message)
+_notmuch_message_list_add_message (notmuch_message_list_t *list,
+				   notmuch_message_t *message)
+{
+    notmuch_message_node_t *node = talloc (list, notmuch_message_node_t);
+
+    node->message = message;
+    node->next = NULL;
+
+    *(list->tail) = node;
+    list->tail = &node->next;
+}
+
+notmuch_messages_t *
+_notmuch_messages_create (notmuch_message_list_t *list)
 {
-    message_list_t *new = talloc (messages, message_list_t);
+    notmuch_messages_t *messages;
+
+    if (list->head == NULL)
+	return NULL;
 
-    new->message = message;
-    new->next = NULL;
+    messages = talloc (list, notmuch_messages_t);
+    if (unlikely (messages == NULL))
+	return NULL;
 
-    *(messages->tail) = new;
-    messages->tail = &new->next;
+    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)
+notmuch_messages_valid (notmuch_messages_t *messages)
 {
-    return messages->head != NULL;
+    if (messages == NULL)
+	return FALSE;
+
+    if (! messages->is_of_list_type)
+	return _notmuch_mset_messages_valid (messages);
+
+    return (messages->iterator != NULL);
 }
 
 notmuch_message_t *
 notmuch_messages_get (notmuch_messages_t *messages)
 {
-    if (messages->head == NULL)
+    if (! messages->is_of_list_type)
+	return _notmuch_mset_messages_get (messages);
+
+    if (messages->iterator == NULL)
 	return NULL;
 
-    return messages->head->message;
+    return messages->iterator->message;
 }
 
 void
-notmuch_messages_advance (notmuch_messages_t *messages)
+notmuch_messages_move_to_next (notmuch_messages_t *messages)
 {
-    if (messages->head == NULL)
+    if (! messages->is_of_list_type) {
+	_notmuch_mset_messages_move_to_next (messages);
+	return;
+    }
+
+    if (messages->iterator == NULL)
 	return;
 
-    messages->head = messages->head->next;
+    messages->iterator = messages->iterator->next;
 }
 
 void
@@ -95,3 +132,42 @@ notmuch_messages_destroy (notmuch_messages_t *messages)
 {
     talloc_free (messages);
 }
+
+
+notmuch_tags_t *
+notmuch_messages_collect_tags (notmuch_messages_t *messages)
+{
+    notmuch_string_list_t *tags;
+    notmuch_tags_t *msg_tags;
+    notmuch_message_t *msg;
+    GHashTable *htable;
+    GList *keys, *l;
+    const char *tag;
+
+    tags = _notmuch_string_list_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_move_to_next (msg_tags);
+	}
+	notmuch_tags_destroy (msg_tags);
+	notmuch_message_destroy (msg);
+	notmuch_messages_move_to_next (messages);
+    }
+
+    keys = g_hash_table_get_keys (htable);
+    for (l = keys; l; l = l->next) {
+	_notmuch_string_list_append (tags, (char *)l->data);
+    }
+
+    g_list_free (keys);
+    g_hash_table_destroy (htable);
+
+    _notmuch_string_list_sort (tags);
+    return _notmuch_tags_create (messages, tags);
+}