ash: Refactor some code that snaps windows.

ash/wm/window_util.h

 // Copyright (c) 2012 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_UTIL_H_
 #define ASH_WM_WINDOW_UTIL_H_
 
 #include "ash/ash_export.h"
+#include "ash/wm/workspace/snap_sizer.h"
 #include "base/compiler_specific.h"
 #include "ui/base/ui_base_types.h"
 
 namespace aura {
 class RootWindow;
 class Window;
 }
 
 namespace gfx {
 class Rect;
@@ skipping 58 matching lines @@
 
 // Restores |window|, which must not be NULL.
 ASH_EXPORT void RestoreWindow(aura::Window* window);
 
 // Maximizes or restores |window| based on its state. |window| must not be NULL.
 ASH_EXPORT void ToggleMaximizedWindow(aura::Window* window);
 
 // Moves the window to the center of the display.
 ASH_EXPORT void CenterWindow(aura::Window* window);
 
+// Snaps a window left or right.
+ASH_EXPORT void SnapWindow(aura::Window* window,

[sky, 2012/11/28 22:04:01]

In hope of not making this file contain a ton of stuff, what do you think of
making this a static function on SnapSizer? Especially since it takes a
SnapSizer edge.

[sadrul, 2012/11/28 23:20:16]

Yep. Sounds good to me. Done.

+                           internal::SnapSizer::Edge edge);
+
 // Returns the existing Layer for |window| (and all its descendants) and creates
 // a new layer for |window| and all its descendants. This is intended for
 // animations that want to animate between the existing visuals and a new window
 // state. The caller owns the return value.
 //
 // As a result of this |window| has freshly created layers, meaning the layers
 // are all empty (nothing has been painted to them) and are sized to 0x0. Soon
 // after this call you need to reset the bounds of the window. Or, you can pass
 // true as the second argument to let the function do that.
 ASH_EXPORT ui::Layer* RecreateWindowLayers(aura::Window* window,
@@ skipping 27 matching lines @@
 
 // Move the given bounds inside the given work area, including a safety margin.
 ASH_EXPORT void AdjustBoundsToEnsureWindowVisibility(
     gfx::Rect* bounds,
     const gfx::Rect& work_area);
 
 }  // namespace wm
 }  // namespace ash
 
 #endif  // ASH_WM_WINDOW_UTIL_H_