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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 "content/public/browser/web_contents.h"
#include "content/public/browser/web_contents_observer.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebDragOperation.h"
struct BrowserPluginHostMsg_Attach_Params;
struct BrowserPluginHostMsg_ResizeGuest_Params;
namespace gfx {
class Point;
}
namespace content {
class BrowserPluginGuest;
class BrowserPluginGuestManager;
class BrowserPluginHostFactory;
class RenderWidgetHostImpl;
class WebContentsImpl;
class CONTENT_EXPORT BrowserPluginEmbedder : public WebContentsObserver {
public:
virtual ~BrowserPluginEmbedder();
static BrowserPluginEmbedder* Create(WebContentsImpl* web_contents);
// Returns the RenderViewHost at a point (|x|, |y|) asynchronously via
// |callback|. We need a roundtrip to renderer process to get this
// information.
void GetRenderViewHostAtPosition(
int x,
int y,
const WebContents::GetRenderViewHostCallback& callback);
// Called when embedder's |rwh| has sent screen rects to renderer.
void DidSendScreenRects();
// Overrides factory for testing. Default (NULL) value indicates regular
// (non-test) environment.
static void set_factory_for_testing(BrowserPluginHostFactory* factory) {
factory_ = factory;
}
// WebContentsObserver implementation.
virtual void RenderViewGone(base::TerminationStatus status) OVERRIDE;
virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
void DragSourceEndedAt(int client_x, int client_y, int screen_x,
int screen_y, WebKit::WebDragOperation operation);
void DragSourceMovedTo(int client_x, int client_y,
int screen_x, int screen_y);
void OnUpdateDragCursor(bool* handled);
void DragEnteredGuest(BrowserPluginGuest* guest);
void DragLeftGuest(BrowserPluginGuest* guest);
void StartDrag(BrowserPluginGuest* guest);
void StopDrag(BrowserPluginGuest* guest);
void SystemDragEnded();
private:
friend class TestBrowserPluginEmbedder;
BrowserPluginEmbedder(WebContentsImpl* web_contents);
void CleanUp();
BrowserPluginGuestManager* GetBrowserPluginGuestManager();
// Message handlers.
void OnAllocateInstanceID(int request_id);
void OnAttach(int instance_id,
const BrowserPluginHostMsg_Attach_Params& params);
void OnPluginAtPositionResponse(int instance_id,
int request_id,
const gfx::Point& position);
// Static factory instance (always NULL for non-test).
static BrowserPluginHostFactory* factory_;
// Map that contains outstanding queries to |GetRenderViewHostAtPosition|.
// We need a roundtrip to the renderer process to retrieve the answer,
// so we store these callbacks until we hear back from the renderer.
typedef std::map<int, WebContents::GetRenderViewHostCallback>
GetRenderViewHostCallbackMap;
GetRenderViewHostCallbackMap pending_get_render_view_callbacks_;
// Next request id for BrowserPluginMsg_PluginAtPositionRequest query.
int next_get_render_view_request_id_;
// 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_;
DISALLOW_COPY_AND_ASSIGN(BrowserPluginEmbedder);
};
} // namespace content
#endif // CONTENT_BROWSER_BROWSER_PLUGIN_BROWSER_PLUGIN_EMBEDDER_H_
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