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
|
// Copyright (c) 2017 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 CONTENT_BROWSER_RENDERER_HOST_CURSOR_MANAGER_H_
#define CONTENT_BROWSER_RENDERER_HOST_CURSOR_MANAGER_H_
#include <map>
#include "content/common/content_export.h"
#include "content/common/cursors/webcursor.h"
namespace content {
class RenderWidgetHostViewBase;
// CursorManager coordinates mouse cursors for multiple RenderWidgetHostViews
// on a single page. It is owned by the top-level RenderWidgetHostView and
// calls back to its DisplayCursor method when the cursor needs to change,
// either because the mouse moved over a different view or because a cursor
// update was received for the current view.
class CONTENT_EXPORT CursorManager {
public:
class TooltipObserver {
public:
virtual ~TooltipObserver() {}
virtual void OnSetTooltipTextForView(
const RenderWidgetHostViewBase* view,
const base::string16& tooltip_text) = 0;
};
CursorManager(RenderWidgetHostViewBase* root);
~CursorManager();
// Called for any RenderWidgetHostView that received an UpdateCursor message
// from its renderer process.
void UpdateCursor(RenderWidgetHostViewBase*, const WebCursor&);
// Called when the mouse moves over a different RenderWidgetHostView.
void UpdateViewUnderCursor(RenderWidgetHostViewBase*);
// Accepts TooltipText updates from views, but only updates what's displayed
// if the requesting view is currently under the mouse cursor.
void SetTooltipTextForView(const RenderWidgetHostViewBase* view,
const base::string16& tooltip_text);
// Notification of a RenderWidgetHostView being destroyed, so that its
// cursor map entry can be removed if it has one. If it is the current
// view_under_cursor_, then the root_view_'s cursor will be displayed.
void ViewBeingDestroyed(RenderWidgetHostViewBase*);
// Accessor for browser tests, enabling verification of the cursor_map_.
// Returns false if the provided View is not in the map, and outputs
// the cursor otherwise.
bool GetCursorForTesting(RenderWidgetHostViewBase*, WebCursor&);
void SetTooltipObserverForTesting(TooltipObserver* observer);
private:
// Stores the last received cursor from each RenderWidgetHostView.
std::map<RenderWidgetHostViewBase*, WebCursor> cursor_map_;
// The view currently underneath the cursor, which corresponds to the cursor
// currently displayed.
RenderWidgetHostViewBase* view_under_cursor_;
// The root view is the target for DisplayCursor calls whenever the active
// cursor needs to change.
RenderWidgetHostViewBase* root_view_;
TooltipObserver* tooltip_observer_for_testing_;
};
} // namespace content
#endif // CONTENT_BROWSER_RENDERER_HOST_CURSOR_MANAGER_H_
|
