[Mode] Add some extra validating of the mode selected to complete.

3 files changed, 28 insertions, 2 deletions

diff --git a/include/mode.h b/include/mode.h
index a60c9954..0a7b839c 100644
--- a/include/mode.h
+++ b/include/mode.h
@@ -269,6 +269,14 @@ Mode *mode_create(const Mode *mode);
 ModeMode mode_completer_result(Mode *sw, int menu_retv, char **input,
                                unsigned int selected_line, char **path);
 
+/**
+ * @param mode The mode to query.
+ *
+ * Check if mode is a valid completer.
+ *
+ * @returns TRUE if mode can be used as completer.
+ */
+gboolean mode_is_completer(const Mode *sw);
 /**@}*/
 G_END_DECLS
 #endif
diff --git a/source/mode.c b/source/mode.c
index 2e2cdfa3..7cb070de 100644
--- a/source/mode.c
+++ b/source/mode.c
@@ -45,9 +45,16 @@ int mode_init(Mode *mode) {
   g_return_val_if_fail(mode != NULL, FALSE);
   g_return_val_if_fail(mode->_init != NULL, FALSE);
   if (mode->type == MODE_TYPE_UNSET) {
-    g_warning("Mode '%s' does not have a type set. Please update mode.",
+    g_warning("Mode '%s' does not have a type set. Please update mode/plugin.",
               mode->name);
   }
+  if ((mode->type & MODE_TYPE_COMPLETER) == MODE_TYPE_COMPLETER) {
+    if (mode->_completer_result == NULL) {
+      g_error(
+          "Mode '%s' is incomplete and does not implement _completer_result.",
+          mode->name);
+    }
+  }
   // to make sure this is initialized correctly.
   mode->fallback_icon_fetch_uid = 0;
   mode->fallback_icon_not_found = FALSE;
@@ -229,4 +236,13 @@ ModeMode mode_completer_result(Mode *mode, int menu_retv, char **input,
   return 0;
 }
 
+gboolean mode_is_completer(const Mode *mode) {
+  if (mode) {
+    if ((mode->type & MODE_TYPE_COMPLETER) == MODE_TYPE_COMPLETER) {
+      return TRUE;
+    }
+  }
+  return FALSE;
+}
+
 /**@}*/
diff --git a/source/rofi.c b/source/rofi.c
index 10d94a0e..214a78f6 100644
--- a/source/rofi.c
+++ b/source/rofi.c
@@ -1214,9 +1214,11 @@ int rofi_theme_rasi_validate(const char *filename) {
 
 const Mode *rofi_get_completer(void) {
   const Mode *index = mode_available_lookup(config.completer_mode);
-  printf("%p\n", index);
   if (index != NULL) {
     return index;
   }
+  const char *name =
+      config.completer_mode == NULL ? "(null)" : config.completer_mode;
+  g_warning("Mode: %s not found or is not valid for use as completer.", name);
   return NULL;
 }