summaryrefslogtreecommitdiffstats
path: root/content/browser/browser_plugin/browser_plugin_embedder.h
blob: 4c3731837ac2da56467efe8a2a6dd5d92c964961 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
// 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 "base/memory/weak_ptr.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;

namespace content {

class BrowserPluginGuest;
class BrowserPluginGuestManager;
class RenderWidgetHostImpl;
struct NativeWebKeyboardEvent;

class CONTENT_EXPORT BrowserPluginEmbedder : public WebContentsObserver {
 public:
  ~BrowserPluginEmbedder() override;

  static BrowserPluginEmbedder* Create(WebContentsImpl* web_contents);

  // Called when embedder's |rwh| has sent screen rects to renderer.
  void DidSendScreenRects();

  // WebContentsObserver implementation.
  bool OnMessageReceived(const IPC::Message& message) override;
  bool OnMessageReceived(const IPC::Message& message,
                         RenderFrameHost* render_frame_host) override;

  // Sends a 'dragend' message to the guest that started the drag.
  void DragSourceEndedAt(int client_x, int client_y, int screen_x,
      int screen_y, blink::WebDragOperation operation);

  // Indicates that a drag operation has entered into the bounds of a given
  // |guest|. Returns whether the |guest| also started the operation.
  bool DragEnteredGuest(BrowserPluginGuest* guest);

  // Indicates that a drag operation has left the bounds of a given |guest|.
  void DragLeftGuest(BrowserPluginGuest* guest);

  // Called when the screen info has changed.
  void ScreenInfoChanged();

  // Closes modal dialogs in all of the guests.
  void CancelGuestDialogs();

  // Called by WebContentsViewGuest when a drag operation is started within
  // |guest|. This |guest| will be signaled at the end of the drag operation.
  void StartDrag(BrowserPluginGuest* guest);

  // Sends EndSystemDrag message to the guest that initiated the last drag/drop
  // operation, if there's any.
  void SystemDragEnded();

  // Used to handle special keyboard events.
  bool HandleKeyboardEvent(const NativeWebKeyboardEvent& event);

  // Find the given |search_text| in the page. Returns true if the find request
  // is handled by this browser plugin embedder.
  bool Find(int request_id,
            const base::string16& search_text,
            const blink::WebFindOptions& options);
  bool StopFinding(StopFindAction action);

  // Returns the "full page" guest if there is one. That is, if there is a
  // single BrowserPlugin in the embedder which takes up the full page, then it
  // is returned.
  BrowserPluginGuest* GetFullPageGuest();

 private:
  explicit BrowserPluginEmbedder(WebContentsImpl* web_contents);

  BrowserPluginGuestManager* GetBrowserPluginGuestManager() const;

  void ClearGuestDragStateIfApplicable();

  static bool DidSendScreenRectsCallback(WebContents* guest_web_contents);

  // Notifies a guest that the embedder's screen info has changed.
  static bool NotifyScreenInfoChanged(WebContents* guest_web_contents);

  // Closes modal dialogs in |guest_web_contents|.
  static bool CancelDialogs(WebContents* guest_web_contents);

  static bool UnlockMouseIfNecessaryCallback(bool* mouse_unlocked,
                                             WebContents* guest);

  static bool FindInGuest(int request_id,
                          const base::string16& search_text,
                          const blink::WebFindOptions& options,
                          WebContents* guest);
  static bool StopFindingInGuest(StopFindAction action, WebContents* guest);

  // Message handlers.

  void OnAttach(RenderFrameHost* render_frame_host,
                int instance_id,
                const BrowserPluginHostMsg_Attach_Params& params);
  void OnUpdateDragCursor(bool* handled);

  // 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_;

  // Keeps track of "dragend" state.
  bool guest_drag_ending_;

  base::WeakPtrFactory<BrowserPluginEmbedder> weak_ptr_factory_;

  DISALLOW_COPY_AND_ASSIGN(BrowserPluginEmbedder);
};

}  // namespace content

#endif  // CONTENT_BROWSER_BROWSER_PLUGIN_BROWSER_PLUGIN_EMBEDDER_H_