From 78c1c1518a7382628368b09f8744189edf3ceef3 Mon Sep 17 00:00:00 2001
From: LemonBoy <thatlemon@gmail.com>
Date: Mon, 6 Jun 2016 22:25:32 +0200
Subject: [PATCH] Be smart about case-matching the nicks.

If the prefix contains an uppercase letter then don't use the
case-insensitive search functions.
---
 src/fe-common/core/chat-completion.c | 38 +++++++++++++++++++++-------
 1 file changed, 29 insertions(+), 9 deletions(-)

diff --git a/src/fe-common/core/chat-completion.c b/src/fe-common/core/chat-completion.c
index c37c77cd..b212de5f 100644
--- a/src/fe-common/core/chat-completion.c
+++ b/src/fe-common/core/chat-completion.c
@@ -52,6 +52,18 @@ static int completion_auto, completion_strict;
 	last_msg_add(&((MODULE_CHANNEL_REC *) MODULE_DATA(channel))->lastmsgs, \
 		     nick, own, keep_publics_count)
 
+static int contains_uppercase(const char *s1)
+{
+	const char *ch;
+
+	for (ch = s1; *ch != '\0'; ch++) {
+		if (g_ascii_isupper(*ch))
+			return TRUE;
+	}
+
+	return FALSE;
+}
+
 static LAST_MSG_REC *last_msg_find(GSList *list, const char *nick)
 {
 	while (list != NULL) {
@@ -336,7 +348,8 @@ GList *completion_msg(SERVER_REC *win_server,
 }
 
 static void complete_from_nicklist(GList **outlist, CHANNEL_REC *channel,
-				   const char *nick, const char *suffix)
+				   const char *nick, const char *suffix,
+				   const int match_case)
 {
         MODULE_CHANNEL_REC *mchannel;
 	GSList *tmp;
@@ -352,8 +365,10 @@ static void complete_from_nicklist(GList **outlist, CHANNEL_REC *channel,
 	for (tmp = mchannel->lastmsgs; tmp != NULL; tmp = tmp->next) {
 		LAST_MSG_REC *rec = tmp->data;
 
-		if (g_ascii_strncasecmp(rec->nick, nick, len) == 0 &&
-		    glist_find_icase_string(*outlist, rec->nick) == NULL) {
+		if ((match_case? strncmp(rec->nick, nick, len)
+		     : g_ascii_strncasecmp(rec->nick, nick, len)) == 0 &&
+		    (match_case? glist_find_string(*outlist, rec->nick)
+		     : glist_find_icase_string(*outlist, rec->nick)) == NULL) {
 			str = g_strconcat(rec->nick, suffix, NULL);
 			if (completion_lowercase) ascii_strdown(str);
 			if (rec->own)
@@ -368,7 +383,8 @@ static void complete_from_nicklist(GList **outlist, CHANNEL_REC *channel,
 
 static GList *completion_nicks_nonstrict(CHANNEL_REC *channel,
 					 const char *nick,
-					 const char *suffix)
+					 const char *suffix,
+					 const int match_case)
 {
 	GSList *nicks, *tmp;
 	GList *list;
@@ -404,7 +420,8 @@ static GList *completion_nicks_nonstrict(CHANNEL_REC *channel,
                 *out = '\0';
 
 		/* add to list if 'cleaned' nick matches */
-		if (g_ascii_strncasecmp(str, nick, len) == 0) {
+		if ((match_case? strncmp(str, nick, len)
+		     : g_ascii_strncasecmp(str, nick, len)) == 0) {
 			tnick = g_strconcat(rec->nick, suffix, NULL);
 			if (completion_lowercase)
 				ascii_strdown(tnick);
@@ -428,7 +445,7 @@ static GList *completion_channel_nicks(CHANNEL_REC *channel, const char *nick,
 	GSList *nicks, *tmp;
 	GList *list;
 	char *str;
-	int len;
+	int len, match_case;
 
 	g_return_val_if_fail(channel != NULL, NULL);
 	g_return_val_if_fail(nick != NULL, NULL);
@@ -437,9 +454,11 @@ static GList *completion_channel_nicks(CHANNEL_REC *channel, const char *nick,
 	if (suffix != NULL && *suffix == '\0')
 		suffix = NULL;
 
+	match_case = contains_uppercase(nick);
+
 	/* put first the nicks who have recently said something */
 	list = NULL;
-	complete_from_nicklist(&list, channel, nick, suffix);
+	complete_from_nicklist(&list, channel, nick, suffix, match_case);
 
 	/* and add the rest of the nicks too */
 	len = strlen(nick);
@@ -447,7 +466,8 @@ static GList *completion_channel_nicks(CHANNEL_REC *channel, const char *nick,
 	for (tmp = nicks; tmp != NULL; tmp = tmp->next) {
 		NICK_REC *rec = tmp->data;
 
-		if (g_ascii_strncasecmp(rec->nick, nick, len) == 0 &&
+		if ((match_case? strncmp(rec->nick, nick, len)
+		     : g_ascii_strncasecmp(rec->nick, nick, len)) == 0 &&
 		    rec != channel->ownnick) {
 			str = g_strconcat(rec->nick, suffix, NULL);
 			if (completion_lowercase)
@@ -463,7 +483,7 @@ static GList *completion_channel_nicks(CHANNEL_REC *channel, const char *nick,
 	/* remove non alphanum chars from nick and search again in case
 	   list is still NULL ("foo<tab>" would match "_foo_" f.e.) */
 	if (!completion_strict)
-		list = g_list_concat(list, completion_nicks_nonstrict(channel, nick, suffix));
+		list = g_list_concat(list, completion_nicks_nonstrict(channel, nick, suffix, match_case));
 	return list;
 }