From 4128f78f5543bebc7cd1868736855207019f1f71 Mon Sep 17 00:00:00 2001
From: Jaakko Heinonen <jheinonen@users.sourceforge.net>
Date: Tue, 12 Mar 2002 18:54:29 +0000
Subject: [PATCH] cancel key support added

---
 abook_rl.c | 41 +++++++++++++++++++++++++++++++----------
 abook_rl.h |  2 +-
 edit.c     | 12 ++++++++++--
 ui.c       |  5 +----
 ui.h       |  2 +-
 5 files changed, 44 insertions(+), 18 deletions(-)

diff --git a/abook_rl.c b/abook_rl.c
index be8ac90..43ab31a 100644
--- a/abook_rl.c
+++ b/abook_rl.c
@@ -33,6 +33,8 @@
 static int rl_x, rl_y;
 static WINDOW *rl_win;
 
+static bool rl_cancelled;
+
 static void
 rl_refresh()
 {
@@ -58,26 +60,36 @@ rline_update()
 	rl_refresh();
 }
 
-void
+static void
 rline_compdisp(char **matches, int n, int max_len)
 {
-	/*
-	 * dummy
-	 */
+	/* dummy */
+}
+
+static int
+rl_cancel(int dummy1, int dummy2)
+{
+	rl_cancelled = TRUE;
+
+	rl_done = 1;
+
+	return 0;
 }
 
 static void
-abook_rl_init(int use_completion)
+abook_rl_init(bool use_completion)
 {
 	rl_readline_name = RL_READLINE_NAME;
 	
 	rl_already_prompted = 1;
+	rl_catch_sigwinch = 0;
 	
 	rl_redisplay_function = rline_update;
 	rl_completion_display_matches_hook = rline_compdisp;
-	
+
 	rl_unbind_function_in_map(rl_clear_screen, rl_get_keymap());
 	rl_unbind_function_in_map(rl_reverse_search_history, rl_get_keymap());
+	rl_unbind_function_in_map(rl_re_read_init_file, rl_get_keymap());
 	
 	if(use_completion) {
 		rl_bind_key('\t', rl_menu_complete);
@@ -86,18 +98,21 @@ abook_rl_init(int use_completion)
 		rl_unbind_function_in_map(rl_menu_complete, rl_get_keymap());
 	}
 
+	rl_bind_key('g' & 31, rl_cancel); /* C-g */
+
 	clear_history();
+
+	rl_cancelled = FALSE;
 }	
 
 char *
-abook_readline(WINDOW *w, int y, int x, char *s, int limit, int use_completion)
+abook_readline(WINDOW *w, int y, int x, char *s, int limit, bool use_completion)
 {
-	char *ret = NULL;
+	char *ret;
 
-	rl_win = w;
 	abook_rl_init(use_completion);
 
-	wmove(rl_win, rl_y = y, rl_x = x);
+	wmove(rl_win = w, rl_y = y, rl_x = x);
 	rl_refresh();
 
 	if(s && *s)
@@ -105,6 +120,12 @@ abook_readline(WINDOW *w, int y, int x, char *s, int limit, int use_completion)
 	
 	ret = readline(NULL);
 
+	if(rl_cancelled) {
+		if(ret)
+			free(ret);
+		ret = NULL;
+	}
+
 	return ret;
 }
 
diff --git a/abook_rl.h b/abook_rl.h
index d6c2c22..22b67ba 100644
--- a/abook_rl.h
+++ b/abook_rl.h
@@ -4,6 +4,6 @@
 #include "abook_curses.h"
 
 char		*abook_readline(WINDOW *w, int y, int x, char *s, int limit,
-		int use_completion);
+		bool use_completion);
 
 #endif
diff --git a/edit.c b/edit.c
index 90cc07d..9403975 100644
--- a/edit.c
+++ b/edit.c
@@ -187,6 +187,7 @@ change_field(char *msg, char **field)
 {
 	int max_len = MAX_FIELD_LEN;
 	char *old;
+	int ret = 0;
 
 	if( !strncmp("E-mail", msg, 6) )
 		max_len = MAX_EMAIL_LEN;
@@ -195,12 +196,19 @@ change_field(char *msg, char **field)
 
 	*field = ui_readline(msg, old, max_len - 1, 0);
 
-	free(old);
+	if(*field) {
+		free(old);
+		if(!**field)
+			my_free(*field);
+	} else {
+		*field = old;
+		ret = 1;
+	}
 
 	clear_statusline();
 	refresh_statusline();
 
-	return 0;
+	return ret;
 }
 
 static void
diff --git a/ui.c b/ui.c
index b15d8ba..a7d1a54 100644
--- a/ui.c
+++ b/ui.c
@@ -239,7 +239,7 @@ statusline_addstr(char *str)
 }
 
 char *
-ui_readline(char *prompt, char *s, int limit, int use_completion)
+ui_readline(char *prompt, char *s, int limit, bool use_completion)
 {
 	int y, x;
 	char *ret;
@@ -250,9 +250,6 @@ ui_readline(char *prompt, char *s, int limit, int use_completion)
 
 	ret = abook_readline(bottom, y, x, s, limit, use_completion);
 
-	if(ret && !*ret)
-		my_free(ret);
-
 	if(ret)
 		strtrim(ret);
 
diff --git a/ui.h b/ui.h
index da7cdfa..33107f8 100644
--- a/ui.h
+++ b/ui.h
@@ -20,7 +20,7 @@ int		statusline_ask_boolean(char *msg, int def);
 void            clear_statusline();
 void		display_help(int help);
 void		statusline_addstr(char *str);
-char *		ui_readline(char *prompt, char *s, int limit, int use_completion);
+char *		ui_readline(char *prompt, char *s, int limit, bool use_completion);
 void		refresh_statusline();
 void		get_commands();
 void		ui_remove_items();
-- 
2.39.2