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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef CHROME_FRAME_INFOBARS_INTERNAL_INFOBAR_WINDOW_H_ | |
6 #define CHROME_FRAME_INFOBARS_INTERNAL_INFOBAR_WINDOW_H_ | |
7 | |
8 #include "base/basictypes.h" | |
9 #include "base/memory/scoped_ptr.h" | |
10 #include "base/time/time.h" | |
11 | |
12 #include "chrome_frame/infobars/infobar_content.h" | |
13 #include "chrome_frame/infobars/infobar_manager.h" | |
14 | |
15 struct FunctionStub; | |
16 | |
17 // Manages the display of an InfobarContent instance within a container window. | |
18 // Positions the infobar content by displacing other "natural" content of the | |
19 // window (see ReserveSpace). Allows positioning either above or below the | |
20 // natural content. | |
21 class InfobarWindow { | |
22 public: | |
23 // Integrates the InfobarWindow with its environment. | |
24 class Host { | |
25 public: | |
26 virtual ~Host() {} | |
27 | |
28 // Returns a handle to the window within which infobar content should be | |
29 // created. All windows associated with the infobar content should be | |
30 // descendants of the container window. | |
31 virtual HWND GetContainerWindow() = 0; | |
32 | |
33 // Triggers an immediate re-evaluation of the dimensions of the displaced | |
34 // content. InfobarWindow::ReserveSpace will be called with the natural | |
35 // dimensions of the displaced content. | |
36 virtual void UpdateLayout() = 0; | |
37 }; // class Host | |
38 | |
39 explicit InfobarWindow(InfobarType type); | |
40 ~InfobarWindow(); | |
41 | |
42 void SetHost(Host* host); | |
43 | |
44 // Shows the supplied content in this InfobarWindow. Normally, | |
45 // InfobarContent::InstallInFrame will be called with an InfobarContent::Frame | |
46 // instance the content may use to interact with the InfobarWindow. | |
47 // | |
48 // InfobarContent is deleted when the InfobarWindow is finished with the | |
49 // content (either through failure or when successfully hidden). | |
50 bool Show(InfobarContent* content); | |
51 | |
52 // Hides the infobar. | |
53 void Hide(); | |
54 | |
55 // Receives the total space requested by the displaced content and subtracts | |
56 // any space required by this infobar. Passes the reserved dimensions to | |
57 // InfobarContent::SetDimensions. | |
58 void ReserveSpace(RECT* rect); | |
59 | |
60 private: | |
61 // Provides InfobarContent with access to this InfobarWindow. | |
62 class FrameImpl : public InfobarContent::Frame { | |
63 public: | |
64 explicit FrameImpl(InfobarWindow* infobar_window); | |
65 | |
66 // InfobarContent::Frame implementation | |
67 virtual HWND GetFrameWindow(); | |
68 virtual void CloseInfobar(); | |
69 | |
70 private: | |
71 InfobarWindow* infobar_window_; | |
72 DISALLOW_COPY_AND_ASSIGN(FrameImpl); | |
73 }; // class FrameImpl | |
74 | |
75 // Sets up our state to show or hide and calls Host::UpdateLayout to cause a | |
76 // call to ReserveSpace. Sets up a timer to periodically call UpdateLayout. | |
77 void StartSlidingTowards(int height); | |
78 | |
79 // Based on the initial height, how long (and if) we have been sliding, and | |
80 // the target height, decides what the current height should be. | |
81 int CalculateHeight(); | |
82 | |
83 // Manage a timer that repeatedly calls Host::UpdateLayout | |
84 bool StartTimer(); | |
85 bool StopTimer(); | |
86 | |
87 scoped_ptr<InfobarContent> content_; | |
88 Host* host_; | |
89 FrameImpl frame_impl_; | |
90 InfobarType type_; | |
91 int current_width_; | |
92 int current_height_; | |
93 | |
94 // These variables control our state for sliding and are used to calculate | |
95 // the desired height at any given time. | |
96 base::Time slide_start_; // When we started sliding, or the null time if we | |
97 // are not sliding. | |
98 int initial_height_; // Where we started sliding from | |
99 int target_height_; // Where we are sliding to | |
100 | |
101 // ID and thunk for the slide-effect timer | |
102 int timer_id_; | |
103 FunctionStub* timer_stub_; | |
104 | |
105 DISALLOW_COPY_AND_ASSIGN(InfobarWindow); | |
106 }; // class InfobarWindow | |
107 | |
108 #endif // CHROME_FRAME_INFOBARS_INTERNAL_INFOBAR_WINDOW_H_ | |
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