chrome/browser/geolocation/geolocation_permission_context_android.h

   1 // Copyright 2012 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_GEOLOCATION_GEOLOCATION_PERMISSION_CONTEXT_ANDROID_H_
   6 #define CHROME_BROWSER_GEOLOCATION_GEOLOCATION_PERMISSION_CONTEXT_ANDROID_H_
   7
   8 // The flow for geolocation permissions on Android needs to take into account
   9 // the global geolocation settings so it differs from the desktop one. It
  10 // works as follows.
  11 // GeolocationPermissionContextAndroid::DecidePermission intercepts the flow in
  12 // the UI thread, and posts a task to the blocking pool to CheckSystemLocation.
  13 // CheckSystemLocation will in fact check several possible settings
  14 //     - The global system geolocation setting
  15 //     - The Google location settings on pre KK devices
  16 //     - An old internal Chrome setting on pre-JB MR1 devices
  17 // With all that information it will decide if system location is enabled.
  18 // If enabled, it proceeds with the per site flow via
  19 // GeolocationPermissionContext (which will check per site permissions, create
  20 // infobars, etc.).
  21 //
  22 // Otherwise the permission is already decided.
  23
  24 // There is a bit of thread jumping since some of the permissions (like the
  25 // per site settings) are queried on the UI thread while the system level
  26 // permissions are considered I/O and thus checked in the blocking thread pool.
  27
  28 #include "base/memory/scoped_ptr.h"
  29 #include "base/memory/weak_ptr.h"
  30 #include "chrome/browser/geolocation/geolocation_permission_context.h"
  31 #include "components/content_settings/core/common/permission_request_id.h"
  32 #include "url/gurl.h"
  33
  34 namespace content {
  35 class WebContents;
  36 }
  37
  38 class GoogleLocationSettingsHelper;
  39
  40 class GeolocationPermissionContextAndroid
  41     : public GeolocationPermissionContext {
  42  public:
  43   explicit GeolocationPermissionContextAndroid(Profile* profile);
  44   virtual ~GeolocationPermissionContextAndroid();
  45
  46  private:
  47   struct PermissionRequestInfo {
  48     PermissionRequestInfo();
  49
  50     PermissionRequestID id;
  51     GURL requesting_origin;
  52     GURL embedder_origin;
  53     bool user_gesture;
  54   };
  55
  56   // PermissionContextBase:
  57   virtual void RequestPermission(
  58       content::WebContents* web_contents,
  59        const PermissionRequestID& id,
  60        const GURL& requesting_frame_origin,
  61        bool user_gesture,
  62        const BrowserPermissionCallback& callback) override;
  63
  64   void CheckMasterLocation(content::WebContents* web_contents,
  65                            const PermissionRequestInfo& info,
  66                            const BrowserPermissionCallback& callback);
  67
  68   void ProceedDecidePermission(content::WebContents* web_contents,
  69                                const PermissionRequestInfo& info,
  70                                base::Callback<void(bool)> callback);
  71
  72   // Will perform a final check on the system location settings before
  73   // granting the permission.
  74   void InterceptPermissionCheck(const BrowserPermissionCallback& callback,
  75                                 bool granted);
  76
  77   scoped_ptr<GoogleLocationSettingsHelper> google_location_settings_helper_;
  78   base::WeakPtrFactory<GeolocationPermissionContextAndroid> weak_factory_;
  79
  80  private:
  81   void CheckSystemLocation(content::WebContents* web_contents,
  82                            const PermissionRequestInfo& info,
  83                            base::Callback<void(bool)> callback);
  84
  85   DISALLOW_COPY_AND_ASSIGN(GeolocationPermissionContextAndroid);
  86 };
  87
  88 #endif  // CHROME_BROWSER_GEOLOCATION_GEOLOCATION_PERMISSION_CONTEXT_ANDROID_H_