exo: Fix dragging edge cases

components/exo/shell_surface.h

 // Copyright 2015 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 COMPONENTS_EXO_SHELL_SURFACE_H_
 #define COMPONENTS_EXO_SHELL_SURFACE_H_
 
 #include <deque>
 #include <memory>
 #include <string>
@@ skipping 28 matching lines @@
 // This class provides functions for treating a surfaces like toplevel,
 // fullscreen or popup widgets, move, resize or maximize them, associate
 // metadata like title and class, etc.
 class ShellSurface : public SurfaceDelegate,
                      public SurfaceObserver,
                      public views::WidgetDelegate,
                      public views::View,
                      public ash::wm::WindowStateObserver,
                      public aura::WindowObserver,
                      public WMHelper::ActivationObserver,
+                     public WMHelper::ShellObserver,
                      public WMHelper::AccessibilityObserver {
  public:
   // The initial bounds are relative to the coordinate system from/to which the
   // screen transforms map.
   ShellSurface(Surface* surface,
                ShellSurface* parent,
                const gfx::Rect& initial_bounds,
                ScreenTransform transform_to_screen,
                ScreenTransform transform_from_screen,
                bool activatable,
@@ skipping 171 matching lines @@
   void OnWindowBoundsChanged(aura::Window* window,
                              const gfx::Rect& old_bounds,
                              const gfx::Rect& new_bounds) override;
   void OnWindowDestroying(aura::Window* window) override;
 
   // Overridden from WMHelper::ActivationObserver:
   void OnWindowActivated(
       aura::Window* gained_active,
       aura::Window* lost_active) override;
 
+  // Overridden from WMHelper::ShellObserver:
+  void OnOverviewModeStarted() override;
+  void OnOverviewModeEnded() override;
+
   // Overridden from WMHelper::AccessibilityObserver:
   void OnAccessibilityModeChanged() override;
 
   // Overridden from ui::EventHandler:
   void OnKeyEvent(ui::KeyEvent* event) override;
   void OnMouseEvent(ui::MouseEvent* event) override;
 
   // Overridden from ui::AcceleratorTarget:
   bool AcceleratorPressed(const ui::Accelerator& accelerator) override;
 
@@ skipping 67 matching lines @@
   std::string application_id_;
   gfx::Rect geometry_;
   gfx::Rect pending_geometry_;
   double scale_ = 1.0;
   double pending_scale_ = 1.0;
   base::Closure close_callback_;
   base::Closure surface_destroyed_callback_;
   StateChangedCallback state_changed_callback_;
   ConfigureCallback configure_callback_;
   ScopedConfigure* scoped_configure_ = nullptr;
+  bool ignore_widget_bounds_changes_ = false;
   bool ignore_window_bounds_changes_ = false;
   gfx::Point origin_;
   gfx::Vector2d pending_origin_offset_;
   gfx::Vector2d pending_origin_config_offset_;
   int resize_component_ = HTCAPTION;  // HT constant (see ui/base/hit_test.h)
   int pending_resize_component_ = HTCAPTION;
   aura::Window* shadow_overlay_ = nullptr;
   aura::Window* shadow_underlay_ = nullptr;
   std::unique_ptr<ui::EventHandler> shadow_underlay_event_handler_;
   gfx::Rect shadow_content_bounds_;
   float shadow_background_opacity_ = 1.0;
   std::deque<Config> pending_configs_;
   std::unique_ptr<ash::WindowResizer> resizer_;
   std::unique_ptr<ash::WindowResizer> move_resizer_;
   std::unique_ptr<ScopedAnimationsDisabled> scoped_animations_disabled_;
   int top_inset_height_ = 0;
   int pending_top_inset_height_ = 0;
 
   DISALLOW_COPY_AND_ASSIGN(ShellSurface);
 };
 
 }  // namespace exo
 
 #endif  // COMPONENTS_EXO_SHELL_SURFACE_H_