fix: wrong time displayed after system wakeup.

When system is hibernated or paused, the lock time draws on the screen may not
take effects, when we wakeup our computer, the time displayed is wrong for
minutes, use a one second interval timer will fix this problem.

unlock_indicator.c

@@ -33,7 +33,7 @@
 /*******************************************************************************
  * Variables defined in i3lock.c.
  ******************************************************************************/
-static struct ev_periodic *time_redraw_tick;
+static struct ev_timer *time_redraw_tick;
 
 extern bool debug_mode;
 
@@ -234,14 +234,13 @@ xcb_pixmap_t draw_image(uint32_t *resolution) {
         cairo_stroke(ctx);
 
         /* Display (centered) Time */
-        char *timetext = malloc(6);
-
+        char timetext[100] = {'\0'};
         time_t curtime = time(NULL);
         struct tm *tm = localtime(&curtime);
         if (use24hour)
-            strftime(timetext, 100, TIME_FORMAT_24, tm);
+            strftime(timetext, sizeof(timetext), TIME_FORMAT_24, tm);
         else
-            strftime(timetext, 100, TIME_FORMAT_12, tm);
+            strftime(timetext, sizeof(timetext), TIME_FORMAT_12, tm);
 
         /* Text */
         set_auth_color('l');
@@ -259,8 +258,6 @@ xcb_pixmap_t draw_image(uint32_t *resolution) {
         cairo_show_text(ctx, timetext);
         cairo_close_path(ctx);
 
-        free(timetext);
-
         if (auth_state == STATE_AUTH_WRONG && (modifier_string != NULL)) {
             cairo_text_extents_t extents;
             double x, y;
@@ -370,20 +367,19 @@ void clear_indicator(void) {
 
 /* Periodic redraw for clock updates - taken from github.com/ravinrabbid/i3lock-clock */
 
-static void time_redraw_cb(struct ev_loop *loop, ev_periodic *w, int revents) {
+static void time_redraw_cb(struct ev_loop *loop, ev_timer *w, int revents) {
     redraw_screen();
 }
 
 void start_time_redraw_tick(struct ev_loop* main_loop) {
     if (time_redraw_tick) {
-        ev_periodic_set(time_redraw_tick, 1.0, 60., 0);
-        ev_periodic_again(main_loop, time_redraw_tick);
-    } else {
-        /* When there is no memory, we just don’t have a timeout. We cannot
-        * exit() here, since that would effectively unlock the screen. */
-        if (!(time_redraw_tick = calloc(sizeof(struct ev_periodic), 1)))
         return;
-        ev_periodic_init(time_redraw_tick,time_redraw_cb, 1.0, 60., 0);
-        ev_periodic_start(main_loop, time_redraw_tick);
     }
+
+    /* When there is no memory, we just don’t have a timeout. We cannot
+     * exit() here, since that would effectively unlock the screen. */
+    if (!(time_redraw_tick = calloc(sizeof(struct ev_timer), 1)))
+        return;
+    ev_timer_init(time_redraw_tick, time_redraw_cb, 1.0, 1.0);
+    ev_timer_start(main_loop, time_redraw_tick);
 }