Warn when reloading with unsaved modifications

Since the reload operation overwrites all changes, warn before reloading
if there are unsaved modifications.

Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>

src/calcurse.c

@@ -256,6 +256,13 @@ static inline void key_generic_save(void)
 
 static inline void key_generic_reload(void)
 {
+	if (io_get_modified() && status_ask_bool(_("By reloading items, you "
+			"will lose any unsaved modifications. "
+			"Continue?")) != 1) {
+		wins_update(FLAG_STA);
+		return;
+	}
+
 	/* Reinitialize data structures. */
 	apoint_llist_free();
 	event_llist_free();
@@ -271,6 +278,7 @@ static inline void key_generic_reload(void)
 
 	io_load_todo();
 	io_load_app();
+	io_unset_modified();
 	ui_todo_load_items();
 	ui_todo_sel_reset();
 
@@ -616,6 +624,7 @@ int main(int argc, char **argv)
 	io_load_keys(conf.pager);
 	io_load_todo();
 	io_load_app();
+	io_unset_modified();
 	wins_resize();
 	/*
 	 * Refresh the hidden key handler window here to prevent wgetch() from

src/calcurse.h

@@ -779,6 +779,9 @@ unsigned io_dump_pid(char *);
 unsigned io_get_pid(char *);
 int io_file_is_empty(char *);
 int io_file_cp(const char *, const char *);
+void io_unset_modified(void);
+void io_set_modified(void);
+int io_get_modified(void);
 
 /* keys.c */
 void keys_init(void);

src/io.c

@@ -83,6 +83,8 @@ HTABLE_PROTOTYPE(ht_keybindings, ht_keybindings_s)
     HTABLE_GENERATE(ht_keybindings, ht_keybindings_s, load_keys_ht_getkey,
 		load_keys_ht_compare)
 
+static int modified = 0;
+
 /* Draw a progress bar while saving, loading or exporting data. */
 static void progress_bar(progress_bar_t type, int progress)
 {
@@ -430,6 +432,8 @@ void io_save_cal(enum save_display display)
 	if (!io_save_keys())
 		ERROR_MSG("%s", access_pb);
 
+	io_unset_modified();
+
 	/* Print a message telling data were saved */
 	if (ui_mode == UI_CURSES && conf.system_dialogs) {
 		status_mesg(save_success, enter);
@@ -1342,3 +1346,18 @@ int io_file_cp(const char *src, const char *dst)
 
 	return 1;
 }
+
+void io_unset_modified(void)
+{
+	modified = 0;
+}
+
+void io_set_modified(void)
+{
+	modified = 1;
+}
+
+int io_get_modified(void)
+{
+	return modified;
+}

src/ui-day.c

@@ -314,9 +314,11 @@ void ui_day_item_edit(void)
 			(_("Edit: "), choice_recur_evnt, 2)) {
 		case 1:
 			update_desc(&re->mesg);
+			io_set_modified();
 			break;
 		case 2:
 			update_rept(&re->rpt, re->day);
+			io_set_modified();
 			break;
 		default:
 			return;
@@ -325,6 +327,7 @@ void ui_day_item_edit(void)
 	case EVNT:
 		e = p->item.ev;
 		update_desc(&e->mesg);
+		io_set_modified();
 		break;
 	case RECUR_APPT:
 		ra = p->item.rapt;
@@ -340,23 +343,28 @@ void ui_day_item_edit(void)
 		case 1:
 			need_check_notify = 1;
 			update_start_time(&ra->start, &ra->dur, 1);
+			io_set_modified();
 			break;
 		case 2:
 			update_duration(&ra->start, &ra->dur);
+			io_set_modified();
 			break;
 		case 3:
 			if (notify_bar())
 				need_check_notify =
 				    notify_same_recur_item(ra);
 			update_desc(&ra->mesg);
+			io_set_modified();
 			break;
 		case 4:
 			need_check_notify = 1;
 			update_rept(&ra->rpt, ra->start);
+			io_set_modified();
 			break;
 		case 5:
 			need_check_notify = 1;
 			update_start_time(&ra->start, &ra->dur, 0);
+			io_set_modified();
 			break;
 		default:
 			return;
@@ -375,19 +383,23 @@ void ui_day_item_edit(void)
 		case 1:
 			need_check_notify = 1;
 			update_start_time(&a->start, &a->dur, 1);
+			io_set_modified();
 			break;
 		case 2:
 			update_duration(&a->start, &a->dur);
+			io_set_modified();
 			break;
 		case 3:
 			if (notify_bar())
 				need_check_notify =
 				    notify_same_item(a->start);
 			update_desc(&a->mesg);
+			io_set_modified();
 			break;
 		case 4:
 			need_check_notify = 1;
 			update_start_time(&a->start, &a->dur, 0);
+			io_set_modified();
 			break;
 		default:
 			return;
@@ -549,6 +561,7 @@ void ui_day_item_add(void)
 				  date2sec(*ui_calendar_get_slctd_day(), 0,
 					   0), 1);
 		}
+		io_set_modified();
 	}
 
 	ui_calendar_monthly_view_cache_set_invalid();
@@ -594,6 +607,7 @@ void ui_day_item_delete(unsigned reg)
 			break;
 		case 2:
 			day_item_erase_note(p);
+			io_set_modified();
 			return;
 		default:	/* User escaped */
 			return;
@@ -607,6 +621,7 @@ void ui_day_item_delete(unsigned reg)
 			break;
 		case 2:
 			day_item_add_exc(p, date);
+			io_set_modified();
 			return;
 		default:
 			return;
@@ -617,6 +632,7 @@ void ui_day_item_delete(unsigned reg)
 	p = day_cut_item(date, listbox_get_sel(&lb_apt));
 	day_cut[reg].type = p->type;
 	day_cut[reg].item = p->item;
+	io_set_modified();
 
 	ui_calendar_monthly_view_cache_set_invalid();
 }
@@ -764,6 +780,7 @@ void ui_day_item_repeat(void)
 	p = day_cut_item(date, item_nb);
 	day_cut[REG_BLACK_HOLE].type = p->type;
 	day_cut[REG_BLACK_HOLE].item = p->item;
+	io_set_modified();
 
 	ui_calendar_monthly_view_cache_set_invalid();
 }
@@ -815,6 +832,7 @@ void ui_day_item_paste(unsigned reg)
 
 	day_item_fork(&day_cut[reg], &day);
 	day_paste_item(&day, ui_calendar_get_slctd_day_sec());
+	io_set_modified();
 
 	ui_calendar_monthly_view_cache_set_invalid();
 }
@@ -905,6 +923,7 @@ void ui_day_flag(void)
 
 	struct day_item *item = day_get_item(listbox_get_sel(&lb_apt));
 	day_item_switch_notify(item);
+	io_set_modified();
 }
 
 void ui_day_view_note(void)
@@ -923,4 +942,5 @@ void ui_day_edit_note(void)
 
 	struct day_item *item = day_get_item(listbox_get_sel(&lb_apt));
 	day_edit_note(item, conf.editor);
+	io_set_modified();
 }

src/ui-todo.c

@@ -54,6 +54,7 @@ void ui_todo_add(void)
 		}
 		todo_add(todo_input, ch - '0', NULL);
 		ui_todo_load_items();
+		io_set_modified();
 	}
 }
 
@@ -88,9 +89,11 @@ void ui_todo_delete(void)
 	case 1:
 		todo_delete(item);
 		ui_todo_load_items();
+		io_set_modified();
 		break;
 	case 2:
 		todo_delete_note(item);
+		io_set_modified();
 		break;
 	default:
 		wins_erase_status_bar();
@@ -109,6 +112,7 @@ void ui_todo_edit(void)
 
 	status_mesg(mesg, "");
 	updatestring(win[STA].p, &item->mesg, 0, 1);
+	io_set_modified();
 }
 
 /* Pipe a todo item to an external program. */
@@ -241,6 +245,7 @@ void ui_todo_chg_priority(int diff)
 
 	item_new = todo_add(item->mesg, id, item->note);
 	todo_delete(item);
+	io_set_modified();
 	listbox_set_sel(&lb_todo, todo_get_position(item_new));
 }
 
@@ -260,6 +265,7 @@ void ui_todo_flag(void)
 
 	struct todo *item = todo_get_item(listbox_get_sel(&lb_todo));
 	todo_flag(item);
+	io_set_modified();
 }
 
 void ui_todo_view_note(void)
@@ -278,4 +284,5 @@ void ui_todo_edit_note(void)
 
 	struct todo *item = todo_get_item(listbox_get_sel(&lb_todo));
 	todo_edit_note(item, conf.editor);
+	io_set_modified();
 }