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// Copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_GEOLOCATION_GEOLOCATION_PERMISSION_CONTEXT_H_
#define CHROME_BROWSER_GEOLOCATION_GEOLOCATION_PERMISSION_CONTEXT_H_
#include <map>
#include "base/basictypes.h"
#include "base/file_path.h"
#include "base/ref_counted.h"
class GeolocationDispatcherHost;
class GURL;
class Profile;
class RenderViewHost;
// GeolocationPermissionContext manages Geolocation permissions per origin.
// It keeps an in-memory cache of permissions, and if not available, loads
// from disk. If there's no data, it'll trigger the UI elements to ask the
// user for permission.
// Regardless of where the permission data came from, it always notifies the
// requesting render_view asynchronously via ViewMsg_Geolocation_PermissionSet.
class GeolocationPermissionContext
: public base::RefCountedThreadSafe<GeolocationPermissionContext> {
public:
explicit GeolocationPermissionContext(Profile* profile);
// The render is requesting permission to use Geolocation.
// Response will be sent asynchronously as ViewMsg_Geolocation_PermissionSet.
// Must be called from the IO thread.
void RequestGeolocationPermission(
int render_process_id, int render_view_id, int bridge_id,
const GURL& origin);
// Called once the user sets the geolocation permission.
// It'll update the internal state on different threads via
// SetPermissionMemoryCacheOnIOThread and SetPermissionOnFileThread.
void SetPermission(
int render_process_id, int render_view_id, int bridge_id,
const GURL& origin, bool allowed);
private:
friend class base::RefCountedThreadSafe<GeolocationPermissionContext>;
virtual ~GeolocationPermissionContext();
// This is initially called on the IO thread by the public API
// RequestGeolocationPermission when there's no data available in the
// in-memory cache.
// It forwards a call to the FILE thread which tries to load permission data
// from disk:
// - If available, it will call SetPermissionMemoryCacheOnIOThread() to write
// the in-memory cache in the IO thread, and NotifyPermissionSet to send the
// message to the corresponding render.
// - If not available, it'll delegate to RequestPermissionDataFromUI.
void HandlePermissionMemoryCacheMiss(
int render_process_id, int render_view_id, int bridge_id,
const GURL& origin);
// Triggers the associated UI element to request permission.
void RequestPermissionFromUI(
int render_process_id, int render_view_id, int bridge_id,
const GURL& origin);
// Notifies whether or not the corresponding render is allowed to use
// geolocation.
void NotifyPermissionSet(
int render_process_id, int render_view_id, int bridge_id,
bool allowed);
// Sets permissions_ cache (if not on IO thread, will forward to it).
void SetPermissionMemoryCacheOnIOThread(const GURL& origin, bool allowed);
// Sets permissions file data (if not on FILE thread, will forward to it).
void SetPermissionOnFileThread(const GURL& origin, bool allowed);
// This should only be accessed from the UI thread.
Profile* const profile_;
// Indicates whether profile_ is off the record.
bool const is_off_the_record_;
// The path where geolocation permission data is stored.
FilePath const permissions_path_;
// This should only be accessed from the UI thread.
std::map<std::string, bool> permissions_;
DISALLOW_COPY_AND_ASSIGN(GeolocationPermissionContext);
};
#endif // CHROME_BROWSER_GEOLOCATION_GEOLOCATION_PERMISSION_CONTEXT_H_
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