feat: buggy resize implementation

src/ui.c

@@ -46,6 +46,7 @@ static void print_session(struct uint_point origin, struct session session,
 static void print_user(struct uint_point origin, struct user user,
                        bool multiple);
 static void print_passwd(struct uint_point origin, uint length, bool err);
+static void print_ui();
 
 // ansi resource: https://gist.github.com/fnky/458719343aabd01cfb17a3a4f7296797
 static struct termios orig_term;
@@ -54,6 +55,23 @@ static struct winsize window;
 
 #define INNER_BOX_OUT_MARGIN 2
 struct config* g_config = NULL;
+
+void resize_handler(int) {
+  ioctl(STDOUT_FILENO, TIOCGWINSZ, &window);
+
+  if (window.ws_row < BOX_HEIGHT + INNER_BOX_OUT_MARGIN * 2 ||
+      window.ws_col < BOX_WIDTH + INNER_BOX_OUT_MARGIN * 2) {
+    printf("\033[2J\033[H"); // Clear screen
+    printf("\x1b[1;31mScreen too small\x1b[0m\n");
+    printf("\x1b[%s;%sm\x1b[2J", g_config->colors.bg, g_config->colors.fg);
+    return;
+  }
+
+  printf("\033[2J\033[H"); // Clear screen
+
+  print_ui();
+}
+
 void setup(struct config* config) {
   g_config = config;
   ioctl(STDOUT_FILENO, TIOCGWINSZ, &window);
@@ -81,6 +99,7 @@ void setup(struct config* config) {
   print_footer();
   (void)atexit(restore_all);
   (void)signal(SIGINT, signal_handler);
+  (void)signal(SIGWINCH, resize_handler);
 }
 
 static struct uint_point box_start() {
@@ -173,12 +192,7 @@ void ui_update_ofield(struct opts_field* NNULLABLE self) {
 }
 
 static char* unknown_str = "unknown";
-// NOLINTNEXTLINE(readability-function-cognitive-complexity)
+void print_ui() {
-int load(struct Vector* users, struct Vector* sessions) {
-  /// SETUP
-  gusers = users;
-  gsessions = sessions;
-
   // hostnames larger won't render properly
   const u_char HOSTNAME_SIZE = VALUES_COL - VALUES_SEPR - BOX_HMARGIN;
   char hostname_buf[HOSTNAME_SIZE];
@@ -194,6 +208,35 @@ int load(struct Vector* users, struct Vector* sessions) {
     //     1]);
     // *hidx = '\0';
   }
+  /// PRINTING
+  const struct uint_point BOXSTART = box_start();
+
+  // printf box
+  print_box();
+
+  // put hostname
+  printf("\x1b[%d;%dH\x1b[%sm%s\x1b[%sm", BOXSTART.y + HEAD_ROW,
+         BOXSTART.x + VALUES_COL - VALUES_SEPR - (uint)utf8len(hostname),
+         g_config->colors.e_hostname, hostname, g_config->colors.fg);
+
+  // put date
+  char* fmtd_time = fmt_time(g_config->behavior.timefmt);
+  printf("\x1b[%d;%dH\x1b[%sm%s\x1b[%sm", BOXSTART.y + HEAD_ROW,
+         BOXSTART.x + BOX_WIDTH - 1 - BOX_HMARGIN - (uint)utf8len(fmtd_time),
+         g_config->colors.e_date, fmtd_time, g_config->colors.fg);
+  free(fmtd_time);
+
+  ui_update_field(SESSION);
+  ui_update_field(USER);
+  ui_update_field(PASSWD);
+  ui_update_cursor_focus();
+}
+
+// NOLINTNEXTLINE(readability-function-cognitive-complexity)
+int load(struct Vector* users, struct Vector* sessions) {
+  /// SETUP
+  gusers = users;
+  gsessions = sessions;
 
   of_session =
       ofield_new(sessions->length + g_config->behavior.include_defshell);
@@ -228,28 +271,7 @@ int load(struct Vector* users, struct Vector* sessions) {
     free(initial_state.session_opt);
   }
 
-  /// PRINTING
+  print_ui();
-  const struct uint_point BOXSTART = box_start();
-
-  // printf box
-  print_box();
-
-  // put hostname
-  printf("\x1b[%d;%dH\x1b[%sm%s\x1b[%sm", BOXSTART.y + HEAD_ROW,
-         BOXSTART.x + VALUES_COL - VALUES_SEPR - (uint)utf8len(hostname),
-         g_config->colors.e_hostname, hostname, g_config->colors.fg);
-
-  // put date
-  char* fmtd_time = fmt_time(g_config->behavior.timefmt);
-  printf("\x1b[%d;%dH\x1b[%sm%s\x1b[%sm", BOXSTART.y + HEAD_ROW,
-         BOXSTART.x + BOX_WIDTH - 1 - BOX_HMARGIN - (uint)utf8len(fmtd_time),
-         g_config->colors.e_date, fmtd_time, g_config->colors.fg);
-  free(fmtd_time);
-
-  ui_update_field(SESSION);
-  ui_update_field(USER);
-  ui_update_field(PASSWD);
-  ui_update_cursor_focus();
 
   /// INTERACTIVE
   u_char len;