Separate out logic to handle different category/group of context menu items from RVContextMenu class

chrome/browser/tab_contents/menu_category_base.h

+// Copyright 2014 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_TAB_CONTENTS_MENU_CATEGORY_BASE_H_
+#define CHROME_BROWSER_TAB_CONTENTS_MENU_CATEGORY_BASE_H_
+
+#include "chrome/browser/custom_handlers/protocol_handler_registry.h"
+#include "content/public/common/context_menu_params.h"
+#include "ui/base/models/simple_menu_model.h"
+
+class Profile;
+
+namespace content {
+class RenderFrameHost;
+class WebContents;
+}
+
+namespace extensions {
+class Extension;
+}
+
+// MenuCategoryBase is a helper to decide which category/group of items are
+// relevant for a given RenderFrameHost and a context.
+//
+// Subclasses can override the behavior of showing/hiding a category.
+class MenuCategoryBase {

[Fady Samuel, 2014/02/24 19:07:29]

This class represents a context not category. It tells RenderViewContextMenu
what categories are supported. How about renaming this to MenuContextBase?

[lazyboy, 2014/02/24 23:45:00]

I've renamed the class to MenuContext, others to MenuContextPanel/Guest...

+ public:
+  virtual ~MenuCategoryBase();
+
+  // Represents a category of menu item groups.
+  // Order matters as they are appended in the enum order.
+  enum ItemCategory {
+    ITEM_CATEGORY_CUSTOM,

[Fady Samuel, 2014/02/24 19:07:29]

Do the bit shifting here perhaps?

[lazyboy, 2014/02/24 23:45:00]

Obsolte now since we're not using masks anymore.

+    ITEM_CATEGORY_PAGE,
+    ITEM_CATEGORY_FRAME,
+    ITEM_CATEGORY_LINK,
+    ITEM_CATEGORY_MEDIA_IMAGE,
+    ITEM_CATEGORY_SEARCHWEBFORIMAGE,
+    ITEM_CATEGORY_MEDIA_VIDEO,
+    ITEM_CATEGORY_MEDIA_AUDIO,
+    ITEM_CATEGORY_MEDIA_PLUGIN,
+    ITEM_CATEGORY_MEDIA_FILE,
+    ITEM_CATEGORY_EDITABLE,
+    ITEM_CATEGORY_COPY,
+    ITEM_CATEGORY_SEARCH_PROVIDER,
+    ITEM_CATEGORY_PRINT,
+    ITEM_CATEGORY_ALL_EXTENSION,
+    ITEM_CATEGORY_CURRENT_EXTENSION,
+    ITEM_CATEGORY_DEVELOPER,
+    ITEM_CATEGORY_DEVTOOLS_UNPACKED_EXT,
+    ITEM_CATEGORY_PRINT_PREVIEW,
+    ITEM_CATEGORY_LAST = ITEM_CATEGORY_PRINT_PREVIEW
+  };

[Fady Samuel, 2014/02/24 19:07:29]

A helper method here: SupportsCategory(...) might be useful.

[lazyboy, 2014/02/24 23:45:00]

Removed bitmask, so this is not required anymore.

+
+  static MenuCategoryBase* Create(
+      content::WebContents* web_contents,
+      content::RenderFrameHost* render_frame_host,
+      const content::ContextMenuParams& params);
+
+  // Returns a bitmask of |ItemCategory|, representing the list of
+  // item categories that are enabled.
+  int GetCategories();
+
+ protected:
+  MenuCategoryBase(content::RenderFrameHost* render_frame_host,
+                   const content::ContextMenuParams& params);
+
+  // Returns if |category| is enabled.
+  virtual bool IsCategoryEnabled(int category);
+
+  const extensions::Extension* GetExtension() const;
+
+  content::ContextMenuParams params_;
+  content::WebContents* source_web_contents_;
+  Profile* profile_;
+
+ private:
+  friend class MenuCategoryFactory;
+
+  bool HasCustomItems(const std::vector<content::MenuItem>& items) const;
+
+  DISALLOW_COPY_AND_ASSIGN(MenuCategoryBase);
+};
+
+#endif  // CHROME_BROWSER_TAB_CONTENTS_MENU_CATEGORY_BASE_H_