Implement automatic layout and stacking for docked windows

ash/wm/workspace/workspace_window_resizer.cc

 // 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.
 
 #include "ash/wm/workspace/workspace_window_resizer.h"
 
 #include <algorithm>
 #include <cmath>
 #include <utility>
 #include <vector>
@@ skipping 92 matching lines @@
 // to move or resize beyond that edge.
 const int kStickyDistancePixels = 64;
 
 // Snapping distance used instead of WorkspaceWindowResizer::kScreenEdgeInset
 // when resizing a window using touchscreen.
 const int kScreenEdgeInsetForTouchResize = 32;
 
 // Returns true if the window should stick to the edge.
 bool ShouldStickToEdge(int distance_from_edge, int sticky_size) {
   if (CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kAshEnableStickyEdges)) {
+          switches::kAshEnableStickyEdges) ||
+      CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kAshEnableDockedWindows)) {
     return distance_from_edge < 0 &&
            distance_from_edge > -sticky_size;
   }
   return distance_from_edge < sticky_size &&
                               distance_from_edge > -sticky_size * 2;
 }
 
 // Returns the coordinate along the secondary axis to snap to.
 int CoordinateAlongSecondaryAxis(SecondaryMagnetismEdge edge,
                                  int leading,
@@ skipping 220 matching lines @@
       new WorkspaceWindowResizer(details, attached_windows) : NULL;
 }
 
 void WorkspaceWindowResizer::Drag(const gfx::Point& location_in_parent,
                                   int event_flags) {
   last_mouse_location_ = location_in_parent;
 
   int sticky_size;
   if (event_flags & ui::EF_CONTROL_DOWN) {
     sticky_size = 0;
-  } else if (CommandLine::ForCurrentProcess()->HasSwitch(
-      switches::kAshEnableStickyEdges)) {
+  } else if (
+      CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kAshEnableStickyEdges) ||
+      CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kAshEnableDockedWindows)) {
     sticky_size = kStickyDistancePixels;
   } else if ((details_.bounds_change & kBoundsChange_Resizes) &&
       details_.source == aura::client::WINDOW_MOVE_SOURCE_TOUCH) {
     sticky_size = kScreenEdgeInsetForTouchResize;
   } else {
     sticky_size = kScreenEdgeInset;
   }
   // |bounds| is in |window()->parent()|'s coordinates.
   gfx::Rect bounds = CalculateBoundsForDrag(details_, location_in_parent);
 
@@ skipping 554 matching lines @@
   gfx::Rect area(ScreenAsh::GetDisplayBoundsInParent(window()));
   if (location.x() <= area.x())
     return SNAP_LEFT_EDGE;
   if (location.x() >= area.right() - 1)
     return SNAP_RIGHT_EDGE;
   return SNAP_NONE;
 }
 
 }  // namespace internal
 }  // namespace ash