Cleanup to keep panel from manipulating its panel strip assignment directly.

chrome/browser/ui/panels/docked_panel_strip.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 CHROME_BROWSER_UI_PANELS_DOCKED_PANEL_STRIP_H_
 #define CHROME_BROWSER_UI_PANELS_DOCKED_PANEL_STRIP_H_
 #pragma once
 
 #include <list>
 #include <set>
@@ skipping 25 matching lines @@
 
   // Rearranges the positions of the panels in the strip.
   // Handles moving panels to/from overflow area as needed.
   // This is called when the display space has been changed, i.e. working
   // area being changed or a panel being closed.
   virtual void RefreshLayout() OVERRIDE;
 
   // Adds a panel to the strip. The panel may be a newly created panel or one
   // that is transitioning from another grouping of panels.
   virtual void AddPanel(Panel* panel) OVERRIDE;
-  virtual bool RemovePanel(Panel* panel) OVERRIDE;
+  virtual void RemovePanel(Panel* panel) OVERRIDE;
   virtual void CloseAll() OVERRIDE;
   virtual void ResizePanelWindow(
       Panel* panel,
       const gfx::Size& preferred_window_size) OVERRIDE;
   virtual void OnPanelAttentionStateChanged(Panel* panel) OVERRIDE;
   virtual void ActivatePanel(Panel* panel) OVERRIDE;
   virtual void MinimizePanel(Panel* panel) OVERRIDE;
   virtual void RestorePanel(Panel* panel) OVERRIDE;
+  virtual bool IsPanelMinimized(const Panel* panel) const OVERRIDE;
   virtual bool CanShowPanelAsActive(const Panel* panel) const OVERRIDE;
   virtual bool CanDragPanel(const Panel* panel) const OVERRIDE;
   virtual void StartDraggingPanel(Panel* panel) OVERRIDE;
   virtual void DragPanel(Panel* panel, int delta_x, int delta_y) OVERRIDE;
   virtual void EndDraggingPanel(Panel* panel, bool cancelled) OVERRIDE;
 
   // Invoked when a panel's expansion state changes.
   void OnPanelExpansionStateChanged(Panel* panel);
 
   // Returns true if we should bring up the titlebars, given the current mouse
   // point.
   bool ShouldBringUpTitlebars(int mouse_x, int mouse_y) const;
 
   // Brings up or down the titlebars for all minimized panels.
   void BringUpOrDownTitlebars(bool bring_up);
 
   // Returns the bottom position for the panel per its expansion state. If auto-
   // hide bottom bar is present, we want to move the minimized panel to the
   // bottom of the screen, not the bottom of the work area.
   int GetBottomPositionForExpansionState(
       Panel::ExpansionState expansion_state) const;
 
   // num_panels() and panels() only includes panels in the panel strip that
   // do NOT have a temporary layout.
   int num_panels() const { return panels_.size(); }
   const Panels& panels() const { return panels_; }
+  Panel* last_panel() const { return panels_.empty() ? NULL : panels_.back(); }
 
   gfx::Rect display_area() const { return display_area_; }
 
   int GetMaxPanelWidth() const;
   int GetMaxPanelHeight() const;
   int StartingRightPosition() const;
 
   void OnAutoHidingDesktopBarVisibilityChanged(
       AutoHidingDesktopBar::Alignment alignment,
       AutoHidingDesktopBar::Visibility visibility);
 
   void OnFullScreenModeChanged(bool is_full_screen);
 
+  // Returns |true| if panel can fit in the dock strip.
+  bool CanFitPanel(const Panel* panel) const;
+
+  // Used to temporarily disable/re-enable layout refreshes while manipulating
+  // multiple panels at a time.
+  void enable_layout_refresh(bool enable) { layout_refresh_enabled_ = enable; }
+
 #ifdef UNIT_TEST
   int num_temporary_layout_panels() const {
     return panels_in_temporary_layout_.size();
   }
 #endif
 
  private:
   enum TitlebarAction {
     NO_ACTION,
     BRING_UP,
@@ skipping 35 matching lines @@
 
   Panels panels_;
 
   // Stores newly created panels that have a temporary layout until they
   // are moved to overflow after a delay.
   std::set<Panel*> panels_in_temporary_layout_;
 
   int minimized_panel_count_;
   bool are_titlebars_up_;
 
-  // |True| to temporarily prevent refreshing panel layout, e.g. while
+  // |False| to temporarily prevent refreshing panel layout, e.g. while
   // moving panels to overflow area to make room for a panel in this strip.
-  bool disable_layout_refresh_;
+  bool layout_refresh_enabled_;
 
   // Referring to current position in |panels_| where the dragging panel
   // resides.
   Panels::iterator dragging_panel_current_iterator_;
 
   // Referring to original position in |panels_| where the dragging panel
   // resides.
   Panels::iterator dragging_panel_original_iterator_;
 
   // Delayed transitions support. Sometimes transitions between minimized and
   // title-only states are delayed, for better usability with Taskbars/Docks.
   TitlebarAction delayed_titlebar_action_;
 
   // Owned by MessageLoop after posting.
   base::WeakPtrFactory<DockedPanelStrip> titlebar_action_factory_;
 
   static const int kPanelsHorizontalSpacing = 4;
 
   // Absolute minimum width and height for panels, including non-client area.
   // Should only be big enough to accomodate a close button on the reasonably
   // recognisable titlebar.
   static const int kPanelMinWidth;
   static const int kPanelMinHeight;
 
   DISALLOW_COPY_AND_ASSIGN(DockedPanelStrip);
 };
 
 #endif  // CHROME_BROWSER_UI_PANELS_DOCKED_PANEL_STRIP_H_