clapper-app: Fix missing media in file dialog on Windows

Windows does not support mime-types file filters, so use file extensions instead

src/bin/clapper-app/clapper-app-file-dialog.c

@@ -80,8 +80,15 @@ _dialog_add_mime_types (GtkFileDialog *dialog, const gchar *filter_name,
   GtkFileFilter *filter = gtk_file_filter_new ();
   guint i;
 
-  for (i = 0; mime_types[i]; ++i)
+  /* XXX: Windows does not support mime-types file
+   * filters, so use file extensions instead */
+  for (i = 0; mime_types[i]; ++i) {
+#ifndef G_OS_WIN32
     gtk_file_filter_add_mime_type (filter, mime_types[i]);
+#else
+    gtk_file_filter_add_suffix (filter, mime_types[i]);
+#endif
+  }
 
   gtk_file_filter_set_name (filter, filter_name);
   g_list_store_append (filters, filter);
@@ -99,7 +106,11 @@ clapper_app_file_dialog_open_files (GtkApplication *gtk_app)
   GtkFileDialog *dialog = gtk_file_dialog_new ();
 
   _dialog_add_mime_types (dialog, "Media Files",
+#ifndef G_OS_WIN32
       clapper_app_utils_get_mime_types ());
+#else
+      clapper_app_utils_get_extensions ());
+#endif
 
   gtk_file_dialog_set_modal (dialog, TRUE);
   gtk_file_dialog_set_title (dialog, "Add Files");
@@ -118,7 +129,11 @@ clapper_app_file_dialog_open_subtitles (GtkApplication *gtk_app, ClapperMediaIte
   GtkFileDialog *dialog = gtk_file_dialog_new ();
 
   _dialog_add_mime_types (dialog, "Subtitles",
+#ifndef G_OS_WIN32
       clapper_app_utils_get_subtitles_mime_types ());
+#else
+      clapper_app_utils_get_subtitles_extensions ());
+#endif
 
   gtk_file_dialog_set_modal (dialog, TRUE);
   gtk_file_dialog_set_title (dialog, "Open Subtitles");

src/bin/clapper-app/clapper-app-utils.c

@@ -23,6 +23,30 @@
 #include "clapper-app-utils.h"
 #include "clapper-app-media-item-box.h"
 
+/* Useful only on Windows */
+#ifdef G_OS_WIN32
+const gchar *const *
+clapper_app_utils_get_extensions (void)
+{
+  static const gchar *const all_extensions[] = {
+    "avi", "claps", "m2ts", "mkv", "mov",
+    "mp4", "webm", "wmv", NULL
+  };
+
+  return all_extensions;
+}
+
+const gchar *const *
+clapper_app_utils_get_subtitles_extensions (void)
+{
+  static const gchar *const subs_extensions[] = {
+    "srt", "vtt", NULL
+  };
+
+  return subs_extensions;
+}
+#endif
+
 const gchar *const *
 clapper_app_utils_get_mime_types (void)
 {

src/bin/clapper-app/clapper-app-utils.h

@@ -26,6 +26,14 @@ G_BEGIN_DECLS
 
 typedef void (* ClapperAppUtilsIterRanks) (const gchar *feature_name, GstRank rank, gboolean from_env, gpointer user_data);
 
+#ifdef G_OS_WIN32
+G_GNUC_INTERNAL
+const gchar *const * clapper_app_utils_get_extensions (void);
+
+G_GNUC_INTERNAL
+const gchar *const * clapper_app_utils_get_subtitles_extensions (void);
+#endif
+
 G_GNUC_INTERNAL
 const gchar *const * clapper_app_utils_get_mime_types (void);