xep-0308: Implement LMC for outgoing MUC messages

Including OMEMO encrypted ones.
Also rename `win_println_me_message()` to `win_print_outgoing_muc_msg()
as I think it's a more descriptive name.

src/ui/mucwin.c

@@ -50,6 +50,8 @@
 #include "omemo/omemo.h"
 #endif
 
+static void _mucwin_set_last_message(ProfMucWin *mucwin, const char *const id, const char *const message);
+
 ProfMucWin*
 mucwin_new(const char *const barejid)
 {
@@ -501,7 +503,7 @@ _mucwin_print_triggers(ProfWin *window, const char *const message, GList *trigge
 }
 
 void
-mucwin_outgoing_msg(ProfMucWin *mucwin, const char *const message, const char *const id, prof_enc_t enc_mode)
+mucwin_outgoing_msg(ProfMucWin *mucwin, const char *const message, const char *const id, prof_enc_t enc_mode, const char *const replace_id)
 {
     assert(mucwin != NULL);
 
@@ -519,7 +521,12 @@ mucwin_outgoing_msg(ProfMucWin *mucwin, const char *const message, const char *c
         ch = prefs_get_omemo_char();
     }
 
-    win_println_me_message(window, ch, mynick, "%s", message);
+    win_print_outgoing_muc_msg(window, ch, mynick, id, replace_id, "%s", message);
+
+    // save last id and message for LMC
+    if (id) {
+        _mucwin_set_last_message(mucwin, id, message);
+    }
 }
 
 void
@@ -951,3 +958,13 @@ mucwin_unset_message_char(ProfMucWin *mucwin)
         mucwin->message_char = NULL;
     }
 }
+
+static void
+_mucwin_set_last_message(ProfMucWin *mucwin, const char *const id, const char *const message)
+{
+    free(mucwin->last_message);
+    mucwin->last_message = strdup(message);
+
+    free(mucwin->last_msg_id);
+    mucwin->last_msg_id = strdup(id);
+}

src/ui/ui.h

@@ -158,7 +158,7 @@ void mucwin_occupant_role_and_affiliation_change(ProfMucWin *mucwin, const char
     const char *const role, const char *const affiliation, const char *const actor, const char *const reason);
 void mucwin_roster(ProfMucWin *mucwin, GList *occupants, const char *const presence);
 void mucwin_history(ProfMucWin *mucwin, const char *const nick, GDateTime *timestamp, const char *const message);
-void mucwin_outgoing_msg(ProfMucWin *mucwin, const char *const message, const char *const id, prof_enc_t enc_mode);
+void mucwin_outgoing_msg(ProfMucWin *mucwin, const char *const message, const char *const id, prof_enc_t enc_mode, const char *const replace_id);
 void mucwin_incoming_msg(ProfMucWin *mucwin, ProfMessage *message, GSList *mentions, GList *triggers);
 void mucwin_subject(ProfMucWin *mucwin, const char *const nick, const char *const subject);
 void mucwin_requires_config(ProfMucWin *mucwin);

src/ui/win_types.h

@@ -178,6 +178,9 @@ typedef struct prof_muc_win_t {
     char *enctext;
     char *message_char;
     GDateTime *last_msg_timestamp;
+    // For LMC
+    char *last_message;
+    char *last_msg_id;
 } ProfMucWin;
 
 typedef struct prof_conf_win_t ProfConfWin;

src/ui/window.c

@@ -203,6 +203,8 @@ win_create_muc(const char *const roomjid)
     new_win->enctext = NULL;
     new_win->message_char = NULL;
     new_win->is_omemo = FALSE;
+    new_win->last_message = NULL;
+    new_win->last_msg_id = NULL;
 
     new_win->memcheck = PROFMUCWIN_MEMCHECK;
 
@@ -1169,7 +1171,7 @@ win_println_them_message(ProfWin *window, char ch, int flags, const char *const
 }
 
 void
-win_println_me_message(ProfWin *window, char ch, const char *const me, const char *const message, ...)
+win_print_outgoing_muc_msg(ProfWin *window, char ch, const char *const me, const char *const id, const char *const replace_id, const char *const message, ...)
 {
     GDateTime *timestamp = g_date_time_new_now_local();
 
@@ -1178,8 +1180,13 @@ win_println_me_message(ProfWin *window, char ch, const char *const me, const cha
     GString *fmt_msg = g_string_new(NULL);
     g_string_vprintf(fmt_msg, message, arg);
 
-    buffer_append(window->layout->buffer, ch, 0, timestamp, 0, THEME_TEXT_ME, me, fmt_msg->str, NULL, NULL);
-    _win_print_internal(window, ch, 0, timestamp, 0, THEME_TEXT_ME, me, fmt_msg->str, NULL);
+    if (replace_id) {
+        _win_correct(window, fmt_msg->str, id, replace_id);
+    } else {
+        _win_printf(window, ch, 0, timestamp, 0, THEME_TEXT_ME, me, id, "%s", fmt_msg->str);
+    }
+//    buffer_append(window->layout->buffer, ch, 0, timestamp, 0, THEME_TEXT_ME, me, fmt_msg->str, NULL, NULL);
+//    _win_print_internal(window, ch, 0, timestamp, 0, THEME_TEXT_ME, me, fmt_msg->str, NULL);
 
     inp_nonblocking(TRUE);
     g_date_time_unref(timestamp);

src/ui/window.h

@@ -63,7 +63,7 @@ void win_show_status_string(ProfWin *window, const char *const from,
 
 void win_print_them(ProfWin *window, theme_item_t theme_item, char ch, int flags, const char *const them);
 void win_println_them_message(ProfWin *window, char ch, int flags, const char *const them, const char *const id, const char *const replace_id, const char *const message, ...);
-void win_println_me_message(ProfWin *window, char ch, const char *const me, const char *const message, ...);
+void win_print_outgoing_muc_msg(ProfWin *window, char ch, const char *const me, const char *const id, const char *const replace_id, const char *const message, ...);
 
 void win_print_outgoing(ProfWin *window, const char ch, const char *const id, const char *const replace_id, const char *const message, ...);
 void win_print_incoming(ProfWin *window, const char *const from, ProfMessage *message);