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| 1 // Copyright 2013 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 ASH_COMMON_WM_WINDOW_POSITIONER_H_ | |
| 6 #define ASH_COMMON_WM_WINDOW_POSITIONER_H_ | |
| 7 | |
| 8 #include "ash/ash_export.h" | |
| 9 #include "base/macros.h" | |
| 10 #include "ui/base/ui_base_types.h" | |
| 11 | |
| 12 namespace display { | |
| 13 class Display; | |
| 14 } | |
| 15 | |
| 16 namespace gfx { | |
| 17 class Rect; | |
| 18 } | |
| 19 | |
| 20 namespace ash { | |
| 21 | |
| 22 class WmShell; | |
| 23 class WmWindow; | |
| 24 | |
| 25 namespace test { | |
| 26 class WindowPositionerTest; | |
| 27 } | |
| 28 | |
| 29 // WindowPositioner is used by the browser to move new popups automatically to | |
| 30 // a usable position on the closest work area (of the active window). | |
| 31 class ASH_EXPORT WindowPositioner { | |
| 32 public: | |
| 33 // When the screen resolution width is smaller then this size, The algorithm | |
| 34 // will default to maximized. | |
| 35 static int GetForceMaximizedWidthLimit(); | |
| 36 | |
| 37 // The number of pixels which are kept free top, left and right when a window | |
| 38 // gets positioned to its default location. | |
| 39 static const int kDesktopBorderSize; | |
| 40 | |
| 41 // Maximum width of a window even if there is more room on the desktop. | |
| 42 static const int kMaximumWindowWidth; | |
| 43 | |
| 44 // Computes and returns the bounds and show state for new window | |
| 45 // based on the parameter passed AND existing windows. |window| is | |
| 46 // the one this function will generate a bounds for and used to | |
| 47 // exclude the self window in making decision how to position the | |
| 48 // window. |window| can be (and in most case) NULL. | |
| 49 // |is_saved_bounds| indicates the |bounds_in_out| is the saved | |
| 50 // bounds. | |
| 51 static void GetBoundsAndShowStateForNewWindow( | |
| 52 const WmWindow* new_window, | |
| 53 bool is_saved_bounds, | |
| 54 ui::WindowShowState show_state_in, | |
| 55 gfx::Rect* bounds_in_out, | |
| 56 ui::WindowShowState* show_state_out); | |
| 57 | |
| 58 // Returns the default bounds for a window to be created in the |display|. | |
| 59 static gfx::Rect GetDefaultWindowBounds(const display::Display& display); | |
| 60 | |
| 61 // Check if after removal or hide of the given |removed_window| an | |
| 62 // automated desktop location management can be performed and | |
| 63 // rearrange accordingly. | |
| 64 static void RearrangeVisibleWindowOnHideOrRemove( | |
| 65 const WmWindow* removed_window); | |
| 66 | |
| 67 // Turn the automatic positioning logic temporarily off. Returns the previous | |
| 68 // state. | |
| 69 static bool DisableAutoPositioning(bool ignore); | |
| 70 | |
| 71 // Check if after insertion or showing of the given |added_window| | |
| 72 // an automated desktop location management can be performed and | |
| 73 // rearrange accordingly. | |
| 74 static void RearrangeVisibleWindowOnShow(WmWindow* added_window); | |
| 75 | |
| 76 explicit WindowPositioner(WmShell* shell); | |
| 77 ~WindowPositioner(); | |
| 78 | |
| 79 // Find a suitable screen position for a popup window and return it. The | |
| 80 // passed input position is only used to retrieve the width and height. | |
| 81 // The position is determined on the left / right / top / bottom first. If | |
| 82 // no smart space is found, the position will follow the standard what other | |
| 83 // operating systems do (default cascading style). | |
| 84 gfx::Rect GetPopupPosition(const gfx::Rect& old_pos); | |
| 85 | |
| 86 // Accessor to set a flag indicating whether the first window in ASH should | |
| 87 // be maximized. | |
| 88 static void SetMaximizeFirstWindow(bool maximize); | |
| 89 | |
| 90 protected: | |
| 91 friend class test::WindowPositionerTest; | |
| 92 | |
| 93 // Find a smart way to position the popup window. If there is no space this | |
| 94 // function will return an empty rectangle. | |
| 95 gfx::Rect SmartPopupPosition(const gfx::Rect& old_pos, | |
| 96 const gfx::Rect& work_area, | |
| 97 int grid); | |
| 98 | |
| 99 // Find the next available cascading popup position (on the given screen). | |
| 100 gfx::Rect NormalPopupPosition(const gfx::Rect& old_pos, | |
| 101 const gfx::Rect& work_area); | |
| 102 | |
| 103 // Align the location to the grid / snap to the right / bottom corner. | |
| 104 gfx::Rect AlignPopupPosition(const gfx::Rect& pos, | |
| 105 const gfx::Rect& work_area, | |
| 106 int grid); | |
| 107 | |
| 108 // Constant exposed for unittest. | |
| 109 static const int kMinimumWindowOffset; | |
| 110 | |
| 111 WmShell* shell_; | |
| 112 | |
| 113 // The offset in X and Y for the next popup which opens. | |
| 114 int pop_position_offset_increment_x; | |
| 115 int pop_position_offset_increment_y; | |
| 116 | |
| 117 // The position on the screen for the first popup which gets shown if no | |
| 118 // empty space can be found. | |
| 119 int popup_position_offset_from_screen_corner_x; | |
| 120 int popup_position_offset_from_screen_corner_y; | |
| 121 | |
| 122 // The last used position. | |
| 123 int last_popup_position_x_; | |
| 124 int last_popup_position_y_; | |
| 125 | |
| 126 DISALLOW_COPY_AND_ASSIGN(WindowPositioner); | |
| 127 }; | |
| 128 | |
| 129 } // namespace ash | |
| 130 | |
| 131 #endif // ASH_COMMON_WM_WINDOW_POSITIONER_H_ | |
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Chromium Code Reviews
Issue 2736573002:
chromeos: Move files in //ash/common to //ash, part 2 (Closed)
