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      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 #include "chrome/browser/geolocation/geolocation_permission_context_android.h"
      6 
      7 #include "base/prefs/pref_service.h"
      8 #include "chrome/browser/android/google_location_settings_helper.h"
      9 #include "chrome/browser/profiles/profile.h"
     10 #include "chrome/common/pref_names.h"
     11 #include "content/public/browser/browser_thread.h"
     12 #include "content/public/browser/web_contents.h"
     13 
     14 GeolocationPermissionContextAndroid::
     15 PermissionRequestInfo::PermissionRequestInfo()
     16     : id(0, 0, 0, GURL()),
     17       user_gesture(false) {}
     18 
     19 GeolocationPermissionContextAndroid::
     20     GeolocationPermissionContextAndroid(Profile* profile)
     21     : GeolocationPermissionContext(profile),
     22       google_location_settings_helper_(
     23           GoogleLocationSettingsHelper::Create()) {
     24 }
     25 
     26 GeolocationPermissionContextAndroid::~GeolocationPermissionContextAndroid() {
     27 }
     28 
     29 void GeolocationPermissionContextAndroid::ProceedDecidePermission(
     30     content::WebContents* web_contents,
     31     const PermissionRequestInfo& info,
     32     base::Callback<void(bool)> callback) {
     33   // Super class implementation expects everything in UI thread instead.
     34   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
     35   GeolocationPermissionContext::DecidePermission(
     36       web_contents, info.id, info.requesting_frame, info.user_gesture,
     37       info.embedder, callback);
     38 }
     39 
     40 void GeolocationPermissionContextAndroid::CheckSystemLocation(
     41     content::WebContents* web_contents,
     42     const PermissionRequestInfo& info,
     43     base::Callback<void(bool)> callback) {
     44   // Check to see if the feature in its entirety has been disabled.
     45   // This must happen before other services (e.g. tabs, extensions)
     46   // get an opportunity to allow the geolocation request.
     47   bool enabled = google_location_settings_helper_->IsSystemLocationEnabled();
     48 
     49   base::Closure ui_closure;
     50   if (enabled) {
     51     ui_closure = base::Bind(
     52         &GeolocationPermissionContextAndroid::ProceedDecidePermission,
     53         this, web_contents, info, callback);
     54   } else {
     55     ui_closure = base::Bind(
     56         &GeolocationPermissionContextAndroid::PermissionDecided,
     57         this, info.id, info.requesting_frame, info.embedder, callback, false);
     58   }
     59 
     60   // This method is executed from the BlockingPool, post the result
     61   // back to the UI thread.
     62   content::BrowserThread::PostTask(
     63       content::BrowserThread::UI, FROM_HERE, ui_closure);
     64 }
     65 
     66 void GeolocationPermissionContextAndroid::DecidePermission(
     67     content::WebContents* web_contents,
     68     const PermissionRequestID& id,
     69     const GURL& requesting_frame,
     70     bool user_gesture,
     71     const GURL& embedder,
     72     base::Callback<void(bool)> callback) {
     73 
     74   PermissionRequestInfo info;
     75   info.id = id;
     76   info.requesting_frame = requesting_frame;
     77   info.user_gesture = user_gesture;
     78   info.embedder = embedder;
     79 
     80   // Called on the UI thread. However, do the work on a separate thread
     81   // to avoid strict mode violation.
     82   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
     83   content::BrowserThread::PostBlockingPoolTask(FROM_HERE,
     84       base::Bind(
     85           &GeolocationPermissionContextAndroid::CheckSystemLocation,
     86           this, web_contents, info, callback));
     87 }
     88