void InitGtkFileChooserNativeSupport()

in shell/browser/ui/file_dialog_gtk.cc [63:128]

• 51 lines of code
• 15 McCabe index (conditional complexity)

void InitGtkFileChooserNativeSupport() {
  // Return early if we have already setup the native functions or we have tried
  // once before and failed. Avoid running expensive dynamic library operations.
  if (supports_gtk_file_chooser_native) {
    return;
  }

  // Mark that we have attempted to initialize support at least once
  supports_gtk_file_chooser_native = false;

  if (!g_module_supported()) {
    return;
  }

  gtk_module = g_module_open("libgtk-3.so", G_MODULE_BIND_LAZY);
  if (!gtk_module) {
    return;
  }

  // Will never be unloaded
  g_module_make_resident(gtk_module);

  bool found = g_module_symbol(
      gtk_module, "gtk_file_chooser_native_new",
      reinterpret_cast<void**>(&dl_gtk_file_chooser_native_new));
  if (!found) {
    return;
  }

  found = g_module_symbol(
      gtk_module, "gtk_native_dialog_set_modal",
      reinterpret_cast<void**>(&dl_gtk_native_dialog_set_modal));
  if (!found) {
    return;
  }

  found =
      g_module_symbol(gtk_module, "gtk_native_dialog_destroy",
                      reinterpret_cast<void**>(&dl_gtk_native_dialog_destroy));
  if (!found) {
    return;
  }

  found = g_module_symbol(gtk_module, "gtk_native_dialog_show",
                          reinterpret_cast<void**>(&dl_gtk_native_dialog_show));
  if (!found) {
    return;
  }

  found = g_module_symbol(gtk_module, "gtk_native_dialog_hide",
                          reinterpret_cast<void**>(&dl_gtk_native_dialog_hide));
  if (!found) {
    return;
  }

  found = g_module_symbol(gtk_module, "gtk_native_dialog_run",
                          reinterpret_cast<void**>(&dl_gtk_native_dialog_run));
  if (!found) {
    return;
  }

  supports_gtk_file_chooser_native =
      dl_gtk_file_chooser_native_new && dl_gtk_native_dialog_set_modal &&
      dl_gtk_native_dialog_destroy && dl_gtk_native_dialog_run &&
      dl_gtk_native_dialog_show && dl_gtk_native_dialog_hide;
}