components/dom_distiller/webui/dom_distiller_handler.h

   1 // Copyright 2013 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_DOM_DISTILLER_WEBUI_DOM_DISTILLER_HANDLER_H_
   6 #define COMPONENTS_DOM_DISTILLER_WEBUI_DOM_DISTILLER_HANDLER_H_
   7
   8 #include <string>
   9
  10 #include "base/memory/weak_ptr.h"
  11 #include "base/values.h"
  12 #include "content/public/browser/web_ui_message_handler.h"
  13
  14 namespace dom_distiller {
  15
  16 class DomDistillerService;
  17
  18 // Handler class for DOM Distiller list operations.
  19 class DomDistillerHandler : public content::WebUIMessageHandler {
  20  public:
  21   // The lifetime of |service| has to outlive this handler.
  22   DomDistillerHandler(DomDistillerService* service, const std::string& scheme);
  23   ~DomDistillerHandler() override;
  24
  25   // content::WebUIMessageHandler implementation.
  26   void RegisterMessages() override;
  27
  28   // Callback from JavaScript for the "requestEntries" message. This
  29   // requests the list of entries and returns it to the front end by calling
  30   // "onReceivedEntries". There are no JavaScript arguments to this method.
  31   void HandleRequestEntries(const base::ListValue* args);
  32
  33   // Callback from JavaScript for when an article should be added. The first
  34   // element in |args| should be a string representing the URL to be added.
  35   void HandleAddArticle(const base::ListValue* args);
  36
  37   // Callback from JavaScript for when an article is selected. The first element
  38   // in |args| should be a string representing the ID of the entry to be
  39   // selected.
  40   void HandleSelectArticle(const base::ListValue* args);
  41
  42   // Callback from JavaScript for when viewing a URL is requested. The first
  43   // element in |args| should be a string representing the URL to be viewed.
  44   void HandleViewUrl(const base::ListValue* args);
  45
  46  private:
  47   // Callback from DomDistillerService when an article is available.
  48   void OnArticleAdded(bool article_available);
  49
  50   // The DomDistillerService.
  51   DomDistillerService* service_;
  52
  53   // The scheme for DOM distiller articles.
  54   std::string article_scheme_;
  55
  56   // Factory for the creating refs in callbacks.
  57   base::WeakPtrFactory<DomDistillerHandler> weak_ptr_factory_;
  58
  59   DISALLOW_COPY_AND_ASSIGN(DomDistillerHandler);
  60 };
  61
  62 }  // namespace dom_distiller
  63
  64 #endif  // COMPONENTS_DOM_DISTILLER_WEBUI_DOM_DISTILLER_HANDLER_H_