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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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