Theme support for the extension shelf

chrome/browser/views/extensions/extension_shelf.h

 // Copyright (c) 2009 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_VIEWS_EXTENSIONS_EXTENSION_SHELF_H_
 #define CHROME_BROWSER_VIEWS_EXTENSIONS_EXTENSION_SHELF_H_
 
 #include "app/gfx/canvas.h"
 #include "app/slide_animation.h"
 #include "base/task.h"
 #include "chrome/browser/extensions/extension_shelf_model.h"
 #include "chrome/browser/extensions/extensions_service.h"
 #include "chrome/browser/views/browser_bubble.h"
+#include "chrome/browser/views/detachable_toolbar_view.h"
 #include "views/view.h"
 
 class Browser;
 namespace views {
   class Label;
   class MouseEvent;
 }
 
 // A shelf that contains Extension toolstrips.
-class ExtensionShelf : public views::View,
+class ExtensionShelf : public DetachableToolbarView,
                        public ExtensionContainer,
                        public ExtensionShelfModelObserver,
                        public AnimationDelegate,
                        public NotificationObserver {
  public:
   explicit ExtensionShelf(Browser* browser);
   virtual ~ExtensionShelf();
 
   // Get the current model.
   ExtensionShelfModel* model() { return model_; }
 
-  // Returns whether the extension shelf is detached from the Chrome frame.
-  bool IsDetachedStyle();
-
   // Toggles a preference for whether to always show the extension shelf.
   static void ToggleWhenExtensionShelfVisible(Profile* profile);
 
-  // View
-  virtual void Paint(gfx::Canvas* canvas);
+  // DetachableToolbarView methods:
+  virtual bool IsOnTop() const;
+  virtual bool IsDetached() const;
+  virtual double GetAnimationValue() const {
+    return size_animation_->GetCurrentValue();
+  }
+
+  // View methods:
+  virtual void PaintChildren(gfx::Canvas* canvas);
   virtual gfx::Size GetPreferredSize();
   virtual void Layout();
   virtual void OnMouseExited(const views::MouseEvent& event);
   virtual void OnMouseEntered(const views::MouseEvent& event);
   virtual bool GetAccessibleName(std::wstring* name);
   virtual bool GetAccessibleRole(AccessibilityTypes::Role* role);
   virtual void SetAccessibleName(const std::wstring& name);
+  virtual void ThemeChanged();
 
-  // ExtensionContainer
+  // ExtensionContainer methods:
   virtual void OnExtensionMouseEvent(ExtensionView* view);
   virtual void OnExtensionMouseLeave(ExtensionView* view);
 
-  // ExtensionShelfModelObserver
+  // ExtensionShelfModelObserver methods:
   virtual void ToolstripInsertedAt(ExtensionHost* toolstrip, int index);
   virtual void ToolstripRemovingAt(ExtensionHost* toolstrip, int index);
   virtual void ToolstripDraggingFrom(ExtensionHost* toolstrip, int index);
   virtual void ToolstripMoved(ExtensionHost* toolstrip,
                               int from_index,
                               int to_index);
   virtual void ToolstripChanged(ExtensionShelfModel::iterator toolstrip);
   virtual void ExtensionShelfEmpty();
   virtual void ShelfModelReloaded();
   virtual void ShelfModelDeleting();
 
-  // AnimationDelegate
+  // AnimationDelegate methods:
   virtual void AnimationProgressed(const Animation* animation);
   virtual void AnimationEnded(const Animation* animation);
 
-  // NotificationObserver
+  // NotificationObserver methods:
   virtual void Observe(NotificationType type,
                        const NotificationSource& source,
                        const NotificationDetails& details);
 
  protected:
-  // View
+  // View methods:
   virtual void ChildPreferredSizeChanged(View* child);
 
  private:
   class Toolstrip;
   friend class Toolstrip;
   class PlaceholderView;
 
   // Dragging toolstrips
   void DropExtension(Toolstrip* handle, const gfx::Point& pt, bool cancel);
 
   // Expand the specified toolstrip, navigating to |url| if non-empty,
   // and setting the |height|.
   void ExpandToolstrip(ExtensionHost* host, const GURL& url, int height);
 
   // Collapse the specified toolstrip, navigating to |url| if non-empty.
   void CollapseToolstrip(ExtensionHost* host, const GURL& url);
 
-  // Inits the background bitmap.
+  // Initializes the background bitmaps for all views.
   void InitBackground(gfx::Canvas* canvas, const SkRect& subset);
 
   // Returns the Toolstrip at |x| coordinate.  If |x| is out of bounds, returns
   // NULL.
   Toolstrip* ToolstripAtX(int x);
 
   // Returns the Toolstrip at |index|.
   Toolstrip* ToolstripAtIndex(int index);
 
   // Returns the toolstrip associated with |view|.
   Toolstrip* ToolstripForView(ExtensionView* view);
 
   // Loads initial state from |model_|.
   void LoadFromModel();
 
   // This method computes the bounds for the extension shelf items. If
   // |compute_bounds_only| = TRUE, the bounds for the items are just computed,
   // but are not set. This mode is used by GetPreferredSize() to obtain the
   // desired bounds. If |compute_bounds_only| = FALSE, the bounds are set.
   gfx::Size LayoutItems(bool compute_bounds_only);
 
   // Returns whether the extension shelf always shown (checks pref value).
-  bool IsAlwaysShown();
+  bool IsAlwaysShown() const;
 
   // Returns whether the extension shelf is being displayed over the new tab
   // page.
-  bool OnNewTabPage();
+  bool OnNewTabPage() const;
 
   NotificationRegistrar registrar_;
 
   // Background bitmap to draw under extension views.
-  SkBitmap background_;
+  bool background_needs_repaint_;
+
+  // Whether the background we are remembering is for detached mode or not.
+  // This allows us to switch backgrounds and remember if we've done so, so that
+  // we don't have to do it over and over again.
+  bool background_for_detached_;
 
   // The browser this extension shelf belongs to.
   Browser* browser_;
 
   // The model representing the toolstrips on the shelf.
   ExtensionShelfModel* model_;
 
   // Storage of strings needed for accessibility.
   std::wstring accessible_name_;
 
   // Animation controlling showing and hiding of the shelf.
   scoped_ptr<SlideAnimation> size_animation_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionShelf);
 };
 
 #endif  // CHROME_BROWSER_VIEWS_EXTENSIONS_EXTENSION_SHELF_H_