Stick windows to sides of workspaces

ash/wm/workspace/workspace_layout_manager.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_WORKSPACE_WORKSPACE_LAYOUT_MANAGER_H_
 #define ASH_WM_WORKSPACE_WORKSPACE_LAYOUT_MANAGER_H_
 
 #include <set>
 
 #include "ash/shell_observer.h"
@@ skipping 89 matching lines @@
   void AdjustWindowSizeForScreenChange(aura::Window* window,
                                        AdjustWindowReason reason);
 
   // Updates the bounds of the window from a show state change.
   void UpdateBoundsFromShowState(aura::Window* window);
 
   // If |window| is maximized or fullscreen the bounds of the window are set and
   // true is returned. Does nothing otherwise.
   bool SetMaximizedOrFullscreenBounds(aura::Window* window);
 
+  // Enum for bits that contain edges that a window can be stuck to.
+  // Multiple edges can be combined in a bitmask
+  enum StuckWindowEdges {
+     EDGE_NONE = 0,
+     EDGE_LEFT = 1,
+     EDGE_RIGHT = 2,
+     EDGE_TOP = 4,
+     EDGE_BOTTOM = 8,
+     EDGE_ALL = EDGE_LEFT | EDGE_RIGHT | EDGE_TOP | EDGE_BOTTOM
+  };
+
+  // set the bitmask with edges
+  int CalculateStuckEdges(aura::Window* window);
+
+  // restores stuck state for right or bottom edges
+  gfx::Rect AdjustWindowBoundsForStuckEdges(aura::Window* window,
+                                            const gfx::Rect& bounds);
+
   WorkspaceManager* workspace_manager();
 
   aura::RootWindow* root_window_;
 
   Workspace* workspace_;
 
   // Set of windows we're listening to.
   WindowSet windows_;
 
   // The work area. Cached to avoid unnecessarily moving windows during a
   // workspace switch.
   gfx::Rect work_area_;
 
   DISALLOW_COPY_AND_ASSIGN(WorkspaceLayoutManager);
 };
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_WM_WORKSPACE_WORKSPACE_LAYOUT_MANAGER_H_