1 // Copyright (c) 2011 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 CHROME_BROWSER_UI_WEBUI_DOWNLOADS_DOM_HANDLER_H_ 6 #define CHROME_BROWSER_UI_WEBUI_DOWNLOADS_DOM_HANDLER_H_ 7 #pragma once 8 9 #include <vector> 10 11 #include "base/memory/scoped_callback_factory.h" 12 #include "chrome/browser/download/download_item.h" 13 #include "chrome/browser/download/download_manager.h" 14 #include "content/browser/webui/web_ui.h" 15 16 class ListValue; 17 18 // The handler for Javascript messages related to the "downloads" view, 19 // also observes changes to the download manager. 20 class DownloadsDOMHandler : public WebUIMessageHandler, 21 public DownloadManager::Observer, 22 public DownloadItem::Observer { 23 public: 24 explicit DownloadsDOMHandler(DownloadManager* dlm); 25 virtual ~DownloadsDOMHandler(); 26 27 void Init(); 28 29 // WebUIMessageHandler implementation. 30 virtual void RegisterMessages(); 31 32 // DownloadItem::Observer interface 33 virtual void OnDownloadUpdated(DownloadItem* download); OnDownloadOpened(DownloadItem * download)34 virtual void OnDownloadOpened(DownloadItem* download) { } 35 36 // DownloadManager::Observer interface 37 virtual void ModelChanged(); 38 39 // Callback for the "getDownloads" message. 40 void HandleGetDownloads(const ListValue* args); 41 42 // Callback for the "openFile" message - opens the file in the shell. 43 void HandleOpenFile(const ListValue* args); 44 45 // Callback for the "drag" message - initiates a file object drag. 46 void HandleDrag(const ListValue* args); 47 48 // Callback for the "saveDangerous" message - specifies that the user 49 // wishes to save a dangerous file. 50 void HandleSaveDangerous(const ListValue* args); 51 52 // Callback for the "discardDangerous" message - specifies that the user 53 // wishes to discard (remove) a dangerous file. 54 void HandleDiscardDangerous(const ListValue* args); 55 56 // Callback for the "show" message - shows the file in explorer. 57 void HandleShow(const ListValue* args); 58 59 // Callback for the "pause" message - pauses the file download. 60 void HandlePause(const ListValue* args); 61 62 // Callback for the "remove" message - removes the file download from shelf 63 // and list. 64 void HandleRemove(const ListValue* args); 65 66 // Callback for the "cancel" message - cancels the download. 67 void HandleCancel(const ListValue* args); 68 69 // Callback for the "clearAll" message - clears all the downloads. 70 void HandleClearAll(const ListValue* args); 71 72 private: 73 // Send the current list of downloads to the page. 74 void SendCurrentDownloads(); 75 76 // Clear all download items and their observers. 77 void ClearDownloadItems(); 78 79 // Return the download that corresponds to a given id. 80 DownloadItem* GetDownloadById(int id); 81 82 // Return the download that is referred to in a given value. 83 DownloadItem* GetDownloadByValue(const ListValue* args); 84 85 // Current search text. 86 std::wstring search_text_; 87 88 // Our model 89 DownloadManager* download_manager_; 90 91 // The current set of visible DownloadItems for this view received from the 92 // DownloadManager. DownloadManager owns the DownloadItems. The vector is 93 // kept in order, sorted by ascending start time. 94 typedef std::vector<DownloadItem*> OrderedDownloads; 95 OrderedDownloads download_items_; 96 97 base::ScopedCallbackFactory<DownloadsDOMHandler> callback_factory_; 98 99 DISALLOW_COPY_AND_ASSIGN(DownloadsDOMHandler); 100 }; 101 102 #endif // CHROME_BROWSER_UI_WEBUI_DOWNLOADS_DOM_HANDLER_H_ 103