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      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 EXTENSIONS_BROWSER_EXTENSION_HOST_DELEGATE_H_
      6 #define EXTENSIONS_BROWSER_EXTENSION_HOST_DELEGATE_H_
      7 
      8 #include <string>
      9 
     10 #include "content/public/common/media_stream_request.h"
     11 #include "ui/base/window_open_disposition.h"
     12 
     13 namespace content {
     14 class JavaScriptDialogManager;
     15 class WebContents;
     16 }
     17 
     18 namespace gfx {
     19 class Rect;
     20 }
     21 
     22 namespace extensions {
     23 class Extension;
     24 class ExtensionHost;
     25 
     26 // A delegate to support functionality that cannot exist in the extensions
     27 // module. This is not an inner class of ExtensionHost to allow it to be forward
     28 // declared.
     29 class ExtensionHostDelegate {
     30  public:
     31   virtual ~ExtensionHostDelegate() {}
     32 
     33   // Called after the hosting |web_contents| for an extension is created. The
     34   // implementation may wish to add preference observers to |web_contents|.
     35   virtual void OnExtensionHostCreated(content::WebContents* web_contents) = 0;
     36 
     37   // Called after |host| creates a RenderView for an extension.
     38   virtual void OnRenderViewCreatedForBackgroundPage(ExtensionHost* host) = 0;
     39 
     40   // Returns the embedder's JavaScriptDialogManager or NULL if the embedder
     41   // does not support JavaScript dialogs.
     42   virtual content::JavaScriptDialogManager* GetJavaScriptDialogManager() = 0;
     43 
     44   // Creates a new tab or popup window with |web_contents|. The embedder may
     45   // choose to do nothing if tabs and popups are not supported.
     46   virtual void CreateTab(content::WebContents* web_contents,
     47                          const std::string& extension_id,
     48                          WindowOpenDisposition disposition,
     49                          const gfx::Rect& initial_pos,
     50                          bool user_gesture) = 0;
     51 
     52   // Requests access to an audio or video media stream. Invokes |callback|
     53   // with the response.
     54   virtual void ProcessMediaAccessRequest(
     55       content::WebContents* web_contents,
     56       const content::MediaStreamRequest& request,
     57       const content::MediaResponseCallback& callback,
     58       const Extension* extension) = 0;
     59 
     60   // Checks if we have permission to access the microphone or camera. Note that
     61   // this does not query the user. |type| must be MEDIA_DEVICE_AUDIO_CAPTURE
     62   // or MEDIA_DEVICE_VIDEO_CAPTURE.
     63   virtual bool CheckMediaAccessPermission(content::WebContents* web_contents,
     64                                           const GURL& security_origin,
     65                                           content::MediaStreamType type,
     66                                           const Extension* extension) = 0;
     67 };
     68 
     69 }  // namespace extensions
     70 
     71 #endif  // EXTENSIONS_BROWSER_EXTENSION_HOST_DELEGATE_H_
     72