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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.
// A BrowserPluginEmbedder handles messages coming from a BrowserPlugin's
// embedder that are not directed at any particular existing guest process.
// In the beginning, when a BrowserPlugin instance in the embedder renderer
// process requests an initial navigation, the WebContents for that renderer
// renderer creates a BrowserPluginEmbedder for itself. The
// BrowserPluginEmbedder, in turn, forwards the requests to a
// BrowserPluginGuestManager, which creates and manages the lifetime of the new
// guest.
#ifndef CONTENT_BROWSER_BROWSER_PLUGIN_BROWSER_PLUGIN_EMBEDDER_H_
#define CONTENT_BROWSER_BROWSER_PLUGIN_BROWSER_PLUGIN_EMBEDDER_H_
#include <map>
#include "base/memory/weak_ptr.h"
#include "base/values.h"
#include "content/public/browser/web_contents.h"
#include "content/public/browser/web_contents_observer.h"
#include "third_party/WebKit/public/web/WebDragOperation.h"
struct BrowserPluginHostMsg_Attach_Params;
struct BrowserPluginHostMsg_ResizeGuest_Params;
namespace gfx {
class Point;
}
namespace content {
class BrowserPluginGuest;
class BrowserPluginGuestManager;
class RenderWidgetHostImpl;
class WebContentsImpl;
struct NativeWebKeyboardEvent;
class CONTENT_EXPORT BrowserPluginEmbedder : public WebContentsObserver {
public:
virtual ~BrowserPluginEmbedder();
static BrowserPluginEmbedder* Create(WebContentsImpl* web_contents);
// Returns this embedder's WebContentsImpl.
WebContentsImpl* GetWebContents() const;
// Called when embedder's |rwh| has sent screen rects to renderer.
void DidSendScreenRects();
// WebContentsObserver implementation.
virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
void DragSourceEndedAt(int client_x, int client_y, int screen_x,
int screen_y, blink::WebDragOperation operation);
void OnUpdateDragCursor(bool* handled);
void DragEnteredGuest(BrowserPluginGuest* guest);
void DragLeftGuest(BrowserPluginGuest* guest);
void StartDrag(BrowserPluginGuest* guest);
// Sends EndSystemDrag message to the guest that initiated the last drag/drop
// operation, if there's any.
void SystemDragEnded();
private:
explicit BrowserPluginEmbedder(WebContentsImpl* web_contents);
BrowserPluginGuestManager* GetBrowserPluginGuestManager() const;
bool DidSendScreenRectsCallback(WebContents* guest_web_contents);
bool SetZoomLevelCallback(double level, WebContents* guest_web_contents);
bool UnlockMouseIfNecessaryCallback(const NativeWebKeyboardEvent& event,
WebContents* guest);
// Called by the content embedder when a guest exists with the provided
// |instance_id|.
void OnGuestCallback(int instance_id,
const BrowserPluginHostMsg_Attach_Params& params,
const base::DictionaryValue* extra_params,
WebContents* guest_web_contents);
// Message handlers.
void OnAttach(int instance_id,
const BrowserPluginHostMsg_Attach_Params& params,
const base::DictionaryValue& extra_params);
void OnPluginAtPositionResponse(int instance_id,
int request_id,
const gfx::Point& position);
// Used to correctly update the cursor when dragging over a guest, and to
// handle a race condition when dropping onto the guest that started the drag
// (the race is that the dragend message arrives before the drop message so
// the drop never takes place).
// crbug.com/233571
base::WeakPtr<BrowserPluginGuest> guest_dragging_over_;
// Pointer to the guest that started the drag, used to forward necessary drag
// status messages to the correct guest.
base::WeakPtr<BrowserPluginGuest> guest_started_drag_;
base::WeakPtrFactory<BrowserPluginEmbedder> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(BrowserPluginEmbedder);
};
} // namespace content
#endif // CONTENT_BROWSER_BROWSER_PLUGIN_BROWSER_PLUGIN_EMBEDDER_H_
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