(GTK only) Add icons to the "Permissions" tab of the Website Settings UI.

chrome/browser/ui/gtk/website_settings/permission_selector.h

+// Copyright (c) 2012 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 CHROME_BROWSER_UI_GTK_WEBSITE_SETTINGS_PERMISSION_SELECTOR_H_
+#define CHROME_BROWSER_UI_GTK_WEBSITE_SETTINGS_PERMISSION_SELECTOR_H_
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "base/observer_list.h"
+#include "chrome/browser/ui/gtk/website_settings/permission_selector_observer.h"
+#include "chrome/common/content_settings.h"
+#include "chrome/common/content_settings_types.h"
+#include "ui/base/gtk/gtk_signal.h"
+
+class GtkThemeService;
+typedef struct _GParamSpec GParamSpec;
+typedef struct _GtkWidget GtkWidget;
+
+// The class |PermissionSelector| allows to change the permission |setting| of a
+// given permission |type|.
+class PermissionSelector {
+ public:
+  // Creates a |PermissionSelector| for the given permission |type|. |setting|
+  // is the current permissions setting. It is possible to pass
+  // |CONTENT_SETTING_DEFAULT| as value for |setting|. |default_setting| is the
+  // effective default setting for the given permission |type|. It is not
+  // allowed to pass |CONTENT_SETTING_DEFAULT| as value for |default_setting|.
+  PermissionSelector(GtkThemeService* theme_service_,
+                     ContentSettingsType type,
+                     ContentSetting setting,
+                     ContentSetting default_setting);
+  ~PermissionSelector();
+
+  // Creates the UI for the |PermissionSelector| and returns the widget that
+  // contains the UI elements. The ownership of the widget is transfered to the
+  // caller.
+  GtkWidget* CreateUI();
+
+  // Adds an |observer|.
+  void AddObserver(PermissionSelectorObserver* observer);
+
+  // Returns the current permission setting.
+  ContentSetting setting() const { return setting_; }
+
+  // Returns the permissions type.
+  ContentSettingsType type() const { return type_; }
+
+ private:
+  CHROMEGTK_CALLBACK_0(PermissionSelector, void, OnPermissionChanged);
+  CHROMEGTK_CALLBACK_1(PermissionSelector, void, OnComboBoxShown, GParamSpec*);
+
+  GtkThemeService* theme_service_;
+
+  // The permission type.
+  ContentSettingsType type_;
+  // The current permission setting.
+  ContentSetting setting_;
+  // The effective default setting. This is required to create the proper UI
+  // string for the default setting.
+  ContentSetting default_setting_;
+
+  // The permission type icon. The icon is changed depending on the selected
+  // setting.
+  // Owned by the widget hierarchy created by the CreateUI method.
+  GtkWidget* icon_;
+
+  ObserverList<PermissionSelectorObserver, false> observer_list_;
+
+  DISALLOW_COPY_AND_ASSIGN(PermissionSelector);
+};
+
+#endif  // CHROME_BROWSER_UI_GTK_WEBSITE_SETTINGS_PERMISSION_SELECTOR_H_