Moves more code to ash/wm/common

ash/wm/window_positioner.h

-// Copyright 2013 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 ASH_WM_WINDOW_POSITIONER_H_
-#define ASH_WM_WINDOW_POSITIONER_H_
-
-#include "ash/ash_export.h"
-#include "base/macros.h"
-#include "ui/base/ui_base_types.h"
-
-namespace gfx {
-class Display;
-class Rect;
-}
-
-namespace display {
-using Display = gfx::Display;
-}
-
-namespace ash {
-namespace wm {
-class WmGlobals;
-class WmWindow;
-}
-
-namespace test {
-class WindowPositionerTest;
-}
-
-// WindowPositioner is used by the browser to move new popups automatically to
-// a usable position on the closest work area (of the active window).
-class ASH_EXPORT WindowPositioner {
- public:
-  // When the screen resolution width is smaller then this size, The algorithm
-  // will default to maximized.
-  static int GetForceMaximizedWidthLimit();
-
-  // The number of pixels which are kept free top, left and right when a window
-  // gets positioned to its default location.
-  static const int kDesktopBorderSize;
-
-  // Maximum width of a window even if there is more room on the desktop.
-  static const int kMaximumWindowWidth;
-
-  // Computes and returns the bounds and show state for new window
-  // based on the parameter passed AND existing windows. |window| is
-  // the one this function will generate a bounds for and used to
-  // exclude the self window in making decision how to position the
-  // window. |window| can be (and in most case) NULL.
-  // |is_saved_bounds| indicates the |bounds_in_out| is the saved
-  // bounds.
-  static void GetBoundsAndShowStateForNewWindow(
-      const wm::WmWindow* new_window,
-      bool is_saved_bounds,
-      ui::WindowShowState show_state_in,
-      gfx::Rect* bounds_in_out,
-      ui::WindowShowState* show_state_out);
-
-  // Returns the default bounds for a window to be created in the |display|.
-  static gfx::Rect GetDefaultWindowBounds(const display::Display& display);
-
-  // Check if after removal or hide of the given |removed_window| an
-  // automated desktop location management can be performed and
-  // rearrange accordingly.
-  static void RearrangeVisibleWindowOnHideOrRemove(
-      const wm::WmWindow* removed_window);
-
-  // Turn the automatic positioning logic temporarily off. Returns the previous
-  // state.
-  static bool DisableAutoPositioning(bool ignore);
-
-  // Check if after insertion or showing of the given |added_window|
-  // an automated desktop location management can be performed and
-  // rearrange accordingly.
-  static void RearrangeVisibleWindowOnShow(wm::WmWindow* added_window);
-
-  explicit WindowPositioner(wm::WmGlobals* globals);
-  ~WindowPositioner();
-
-  // Find a suitable screen position for a popup window and return it. The
-  // passed input position is only used to retrieve the width and height.
-  // The position is determined on the left / right / top / bottom first. If
-  // no smart space is found, the position will follow the standard what other
-  // operating systems do (default cascading style).
-  gfx::Rect GetPopupPosition(const gfx::Rect& old_pos);
-
-  // Accessor to set a flag indicating whether the first window in ASH should
-  // be maximized.
-  static void SetMaximizeFirstWindow(bool maximize);
-
- protected:
-  friend class test::WindowPositionerTest;
-
-  // Find a smart way to position the popup window. If there is no space this
-  // function will return an empty rectangle.
-  gfx::Rect SmartPopupPosition(const gfx::Rect& old_pos,
-                               const gfx::Rect& work_area,
-                               int grid);
-
-  // Find the next available cascading popup position (on the given screen).
-  gfx::Rect NormalPopupPosition(const gfx::Rect& old_pos,
-                                const gfx::Rect& work_area);
-
-  // Align the location to the grid / snap to the right / bottom corner.
-  gfx::Rect AlignPopupPosition(const gfx::Rect &pos,
-                               const gfx::Rect &work_area,
-                               int grid);
-
-  // Constant exposed for unittest.
-  static const int kMinimumWindowOffset;
-
-  wm::WmGlobals* globals_;
-
-  // The offset in X and Y for the next popup which opens.
-  int pop_position_offset_increment_x;
-  int pop_position_offset_increment_y;
-
-  // The position on the screen for the first popup which gets shown if no
-  // empty space can be found.
-  int popup_position_offset_from_screen_corner_x;
-  int popup_position_offset_from_screen_corner_y;
-
-  // The last used position.
-  int last_popup_position_x_;
-  int last_popup_position_y_;
-
-  DISALLOW_COPY_AND_ASSIGN(WindowPositioner);
-};
-
-}  // namespace ash
-
-#endif  // ASH_WM_WINDOW_POSITIONER_H_