fix: restore original GTK/appindicator implementation of tray icons (#23674)

shell/browser/ui/gtk/app_indicator_icon.h

@@ -0,0 +1,116 @@
+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef SHELL_BROWSER_UI_GTK_APP_INDICATOR_ICON_H_
+#define SHELL_BROWSER_UI_GTK_APP_INDICATOR_ICON_H_
+
+#include <memory>
+#include <string>
+
+#include "base/files/file_path.h"
+#include "base/macros.h"
+#include "base/memory/weak_ptr.h"
+#include "base/nix/xdg_util.h"
+#include "ui/base/glib/glib_signal.h"
+#include "ui/views/linux_ui/status_icon_linux.h"
+
+typedef struct _AppIndicator AppIndicator;
+typedef struct _GtkWidget GtkWidget;
+
+class SkBitmap;
+
+namespace gfx {
+class ImageSkia;
+}
+
+namespace ui {
+class MenuModel;
+}
+
+namespace electron {
+
+namespace gtkui {
+
+class AppIndicatorIconMenu;
+
+// Status icon implementation which uses libappindicator.
+class AppIndicatorIcon : public views::StatusIconLinux {
+ public:
+  // The id uniquely identifies the new status icon from other chrome status
+  // icons.
+  AppIndicatorIcon(std::string id,
+                   const gfx::ImageSkia& image,
+                   const base::string16& tool_tip);
+  ~AppIndicatorIcon() override;
+
+  // Indicates whether libappindicator so could be opened.
+  static bool CouldOpen();
+
+  // Overridden from views::StatusIconLinux:
+  void SetIcon(const gfx::ImageSkia& image) override;
+  void SetToolTip(const base::string16& tool_tip) override;
+  void UpdatePlatformContextMenu(ui::MenuModel* menu) override;
+  void RefreshPlatformContextMenu() override;
+
+ private:
+  struct SetImageFromFileParams {
+    // The temporary directory in which the icon(s) were written.
+    base::FilePath parent_temp_dir;
+
+    // The icon theme path to pass to libappindicator.
+    std::string icon_theme_path;
+
+    // The icon name to pass to libappindicator.
+    std::string icon_name;
+  };
+
+  // Writes |bitmap| to a temporary directory on a worker thread. The temporary
+  // directory is selected based on KDE's quirks.
+  static SetImageFromFileParams WriteKDE4TempImageOnWorkerThread(
+      const SkBitmap& bitmap,
+      const base::FilePath& existing_temp_dir);
+
+  // Writes |bitmap| to a temporary directory on a worker thread. The temporary
+  // directory is selected based on Unity's quirks.
+  static SetImageFromFileParams WriteUnityTempImageOnWorkerThread(
+      const SkBitmap& bitmap,
+      int icon_change_count,
+      const std::string& id);
+
+  void SetImageFromFile(const SetImageFromFileParams& params);
+  void SetMenu();
+
+  // Sets a menu item at the top of the menu as a replacement for the status
+  // icon click action. Clicking on this menu item should simulate a status icon
+  // click by despatching a click event.
+  void UpdateClickActionReplacementMenuItem();
+
+  // Callback for when the status icon click replacement menu item is activated.
+  void OnClickActionReplacementMenuItemActivated();
+
+  std::string id_;
+  std::string tool_tip_;
+
+  // Used to select KDE or Unity for image setting.
+  base::nix::DesktopEnvironment desktop_env_;
+
+  // Gtk status icon wrapper
+  AppIndicator* icon_;
+
+  std::unique_ptr<AppIndicatorIconMenu> menu_;
+  ui::MenuModel* menu_model_;
+
+  base::FilePath temp_dir_;
+  int icon_change_count_;
+
+  base::WeakPtrFactory<AppIndicatorIcon> weak_factory_{this};
+
+  DISALLOW_COPY_AND_ASSIGN(AppIndicatorIcon);
+};
+
+}  // namespace gtkui
+
+}  // namespace electron
+
+#endif  // SHELL_BROWSER_UI_GTK_APP_INDICATOR_ICON_H_