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// Copyright (c) 2012 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_EXTENSIONS_API_TAB_CAPTURE_TAB_CAPTURE_REGISTRY_H_
#define CHROME_BROWSER_EXTENSIONS_API_TAB_CAPTURE_TAB_CAPTURE_REGISTRY_H_
#include <string>
#include <utility>
#include <vector>
#include "base/macros.h"
#include "base/memory/scoped_vector.h"
#include "base/scoped_observer.h"
#include "chrome/browser/media/media_capture_devices_dispatcher.h"
#include "chrome/common/extensions/api/tab_capture.h"
#include "content/public/browser/media_request_state.h"
#include "extensions/browser/browser_context_keyed_api_factory.h"
#include "extensions/browser/extension_registry_observer.h"
namespace base {
class ListValue;
}
namespace content {
class BrowserContext;
class WebContents;
}
namespace extensions {
class ExtensionRegistry;
namespace tab_capture = api::tab_capture;
class TabCaptureRegistry : public BrowserContextKeyedAPI,
public ExtensionRegistryObserver,
public MediaCaptureDevicesDispatcher::Observer {
public:
static TabCaptureRegistry* Get(content::BrowserContext* context);
// Used by BrowserContextKeyedAPI.
static BrowserContextKeyedAPIFactory<TabCaptureRegistry>*
GetFactoryInstance();
// List all pending, active and stopped capture requests.
void GetCapturedTabs(const std::string& extension_id,
base::ListValue* list_of_capture_info) const;
// Add a tab capture request to the registry when a stream is requested
// through the API. |target_contents| refers to the WebContents associated
// with the tab to be captured. |extension_id| refers to the Extension
// initiating the request. |is_anonymous| is true if GetCapturedTabs() should
// not list the captured tab, and no status change events should be dispatched
// for it.
//
// TODO(miu): This is broken in that it's possible for a later WebContents
// instance to have the same pointer value as a previously-destroyed one. To
// be fixed while working on http://crbug.com/163100.
bool AddRequest(content::WebContents* target_contents,
const std::string& extension_id,
bool is_anonymous);
// Called by MediaStreamDevicesController to verify the request before
// creating the stream. |render_process_id| and |render_frame_id| are used to
// look-up a WebContents instance, which should match the |target_contents|
// from the prior call to AddRequest(). In addition, a request is not
// verified unless the |extension_id| also matches AND the request itself is
// in the PENDING state.
bool VerifyRequest(int render_process_id,
int render_frame_id,
const std::string& extension_id);
private:
friend class BrowserContextKeyedAPIFactory<TabCaptureRegistry>;
class LiveRequest;
explicit TabCaptureRegistry(content::BrowserContext* context);
~TabCaptureRegistry() override;
// Used by BrowserContextKeyedAPI.
static const char* service_name() {
return "TabCaptureRegistry";
}
static const bool kServiceIsCreatedWithBrowserContext = false;
static const bool kServiceRedirectedInIncognito = true;
// ExtensionRegistryObserver implementation.
void OnExtensionUnloaded(content::BrowserContext* browser_context,
const Extension* extension,
UnloadedExtensionInfo::Reason reason) override;
// MediaCaptureDevicesDispatcher::Observer implementation.
void OnRequestUpdate(int original_target_render_process_id,
int original_target_render_frame_id,
content::MediaStreamType stream_type,
const content::MediaRequestState state) override;
// Send a StatusChanged event containing the current state of |request|.
void DispatchStatusChangeEvent(const LiveRequest* request) const;
// Look-up a LiveRequest associated with the given |target_contents| (or
// the originally targetted RenderFrameHost), if any.
LiveRequest* FindRequest(const content::WebContents* target_contents) const;
LiveRequest* FindRequest(int original_target_render_process_id,
int original_target_render_frame_id) const;
// Removes the |request| from |requests_|, thus causing its destruction.
void KillRequest(LiveRequest* request);
content::BrowserContext* const browser_context_;
ScopedVector<LiveRequest> requests_;
ScopedObserver<ExtensionRegistry, ExtensionRegistryObserver>
extension_registry_observer_;
DISALLOW_COPY_AND_ASSIGN(TabCaptureRegistry);
};
} // namespace extensions
#endif // CHROME_BROWSER_EXTENSIONS_API_TAB_CAPTURE_TAB_CAPTURE_REGISTRY_H_
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