Stick windows to sides of workspaces

ash/wm/workspace/workspace_window_resizer.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_WINDOW_RESIZER_H_
 #define ASH_WM_WORKSPACE_WINDOW_RESIZER_H_
 
 #include <vector>
 
 #include "ash/wm/window_resizer.h"
@@ skipping 83 matching lines @@
   // returns the number of pixels that couldn't be allocated to the attached
   // windows (due to min/max size constraints).
   // Note the return value can be positive or negative, a negative value
   // indicating that that many pixels couldn't be removed from the attached
   // windows.
   int CalculateAttachedSizes(
       int delta,
       int available_size,
       std::vector<int>* sizes) const;
 
+  // Returns a bitmask of all edges touching the dock bounds when dock is not
+  // opened yet or the edge representing the side that the dock is opened on.
+  int CalculateDockEdges(const gfx::Rect& bounds) const;
+
   // Divides |amount| evenly between |sizes|. If |amount| is negative it
   // indicates how many pixels |sizes| should be shrunk by.
   // Returns how many pixels failed to be allocated/removed from |sizes|.
   int GrowFairly(int amount, std::vector<WindowSize>& sizes) const;
 
   // Calculate the ratio of pixels that each WindowSize in |sizes| should
   // receive when growing or shrinking.
   void CalculateGrowthRatios(const std::vector<WindowSize*>& sizes,
                              std::vector<float>* out_ratios) const;
 
@@ skipping 69 matching lines @@
   // Gives a previews of where the the window will end up. Only used if there
   // is a grid and the caption is being dragged.
   scoped_ptr<PhantomWindowController> snap_phantom_window_controller_;
 
   // Used to determine the target position of a snap.
   scoped_ptr<SnapSizer> snap_sizer_;
 
   // Last SnapType.
   SnapType snap_type_;
 
+  // Last updated bitmask of all touched edges.
+  mutable int dock_edges_mask_;
+
   // Number of mouse moves since the last bounds change. Only used for phantom
   // placement to track when the mouse is moved while pushed against the edge of
   // the screen.
   int num_mouse_moves_since_bounds_change_;
 
   // The mouse location passed to Drag().
   gfx::Point last_mouse_location_;
 
   // Window the drag has magnetically attached to.
   aura::Window* magnetism_window_;
 
   // Used to verify |magnetism_window_| is still valid.
   aura::WindowTracker window_tracker_;
 
   // If |magnetism_window_| is non-NULL this indicates how the two windows
   // should attach.
   MatchedEdge magnetism_edge_;
 
   DISALLOW_COPY_AND_ASSIGN(WorkspaceWindowResizer);
 };
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_WM_WORKSPACE_WINDOW_RESIZER_H_