1 // Copyright 2014 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef COMPONENTS_RENDERER_CONTEXT_MENU_RENDER_VIEW_CONTEXT_MENU_PROXY_H_ 6 #define COMPONENTS_RENDERER_CONTEXT_MENU_RENDER_VIEW_CONTEXT_MENU_PROXY_H_ 7 8 #include "base/strings/string16.h" 9 10 namespace content { 11 class BrowserContext; 12 class RenderViewHost; 13 class WebContents; 14 } 15 16 // An interface that controls a RenderViewContextMenu instance from observers. 17 // This interface is designed mainly for controlling the instance while showing 18 // so we can add a context-menu item that takes long time to create its text, 19 // such as retrieving the item text from a server. The simplest usage is: 20 // 1. Adding an item with temporary text; 21 // 2. Posting a background task that creates the item text, and; 22 // 3. Calling UpdateMenuItem() in the callback function. 23 // The following snippet describes the simple usage that updates a context-menu 24 // item with this interface. 25 // 26 // class MyTask : public net::URLFetcherDelegate { 27 // public: 28 // MyTask(RenderViewContextMenuProxy* proxy, int id) 29 // : proxy_(proxy), 30 // id_(id) { 31 // } 32 // virtual ~MyTask() { 33 // } 34 // virtual void OnURLFetchComplete(const net::URLFetcher* source, 35 // const GURL& url, 36 // const net::URLRequestStatus& status, 37 // int response, 38 // const net::ResponseCookies& cookies, 39 // const std::string& data) { 40 // bool enabled = response == 200; 41 // const char* text = enabled ? "OK" : "ERROR"; 42 // proxy_->UpdateMenuItem(id_, enabled, base::ASCIIToUTF16(text)); 43 // } 44 // void Start(const GURL* url, net::URLRequestContextGetter* context) { 45 // fetcher_.reset(new URLFetcher(url, URLFetcher::GET, this)); 46 // fetcher_->SetRequestContext(context); 47 // content::AssociateURLFetcherWithRenderView( 48 // fetcher_.get(), 49 // proxy_->GetRenderViewHost()->GetSiteInstance()->GetSite(), 50 // proxy_->GetRenderViewHost()->GetProcess()->GetID(), 51 // proxy_->GetRenderViewHost()->GetRoutingID()); 52 // fetcher_->Start(); 53 // } 54 // 55 // private: 56 // URLFetcher fetcher_; 57 // RenderViewContextMenuProxy* proxy_; 58 // int id_; 59 // }; 60 // 61 // void RenderViewContextMenu::AppendEditableItems() { 62 // // Add a menu item with temporary text shown while we create the final 63 // // text. 64 // menu_model_.AddItemWithStringId(IDC_MY_ITEM, IDC_MY_TEXT); 65 // 66 // // Start a task that creates the final text. 67 // my_task_ = new MyTask(this, IDC_MY_ITEM); 68 // my_task_->Start(...); 69 // } 70 // 71 class RenderViewContextMenuProxy { 72 public: 73 // Add a menu item to a context menu. 74 virtual void AddMenuItem(int command_id, const base::string16& title) = 0; 75 virtual void AddCheckItem(int command_id, const base::string16& title) = 0; 76 virtual void AddSeparator() = 0; 77 78 // Add a submenu item to a context menu. 79 virtual void AddSubMenu(int command_id, 80 const base::string16& label, 81 ui::MenuModel* model) = 0; 82 83 // Update the status and text of the specified context-menu item. 84 virtual void UpdateMenuItem(int command_id, 85 bool enabled, 86 bool hidden, 87 const base::string16& title) = 0; 88 89 // Retrieve the given associated objects with a context menu. 90 virtual content::RenderViewHost* GetRenderViewHost() const = 0; 91 virtual content::WebContents* GetWebContents() const = 0; 92 virtual content::BrowserContext* GetBrowserContext() const = 0; 93 }; 94 95 #endif // COMPONENTS_RENDERER_CONTEXT_MENU_RENDER_VIEW_CONTEXT_MENU_PROXY_H_ 96
