rAc: reduce number of redundant layouts of DetailsContainerView

chrome/browser/ui/views/autofill/autofill_dialog_views.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_VIEWS_AUTOFILL_AUTOFILL_DIALOG_VIEWS_H_
 #define CHROME_BROWSER_UI_VIEWS_AUTOFILL_AUTOFILL_DIALOG_VIEWS_H_
 
 #include <map>
 
 #include "base/memory/scoped_vector.h"
@@ skipping 380 matching lines @@
     virtual void PaintChildren(gfx::Canvas* canvas) OVERRIDE;
     virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
 
    private:
     // Returns the corred resource ID (i.e. IDR_*) for the current |state()|.
     int ResourceIDForState() const;
 
     DISALLOW_COPY_AND_ASSIGN(SuggestedButton);
   };
 
+  // A view that runs a callback whenever its bounds change, and which can
+  // optionally suppress layout.
+  class DetailsContainerView : public views::View {
+   public:
+    explicit DetailsContainerView(const base::Closure& callback);
+    virtual ~DetailsContainerView();
+
+    void set_ignore_layouts(bool ignore_layouts) {
+      ignore_layouts_ = ignore_layouts;
+    }
+
+    // views::View implementation.
+    virtual void OnBoundsChanged(const gfx::Rect& previous_bounds) OVERRIDE;
+    virtual void Layout() OVERRIDE;
+
+   private:
+    base::Closure bounds_changed_callback_;
+
+    // The view ignores Layout() calls when this is true.
+    bool ignore_layouts_;
+
+    DISALLOW_COPY_AND_ASSIGN(DetailsContainerView);
+  };
+
   // A view that contains a suggestion (such as a known address) and a link to
   // edit the suggestion.
   class SuggestionView : public views::View {
    public:
     explicit SuggestionView(AutofillDialogViews* autofill_dialog);
     virtual ~SuggestionView();
 
     void SetState(const SuggestionState& state);
 
     // views::View implementation.
@@ skipping 194 matching lines @@
   AccountChooser* account_chooser_;
 
   // A WebView to that navigates to a Google sign-in page to allow the user to
   // sign-in.
   views::WebView* sign_in_webview_;
 
   // View that wraps |details_container_| and makes it scroll vertically.
   views::ScrollView* scrollable_area_;
 
   // View to host details sections.
-  views::View* details_container_;
+  DetailsContainerView* details_container_;
 
   // A view that overlays |this| (for "loading..." messages).
   views::View* loading_shield_;
 
   // The view that completely overlays the dialog (used for the splash page).
   OverlayView* overlay_view_;
 
   // The "Extra view" is on the same row as the dialog buttons.
   views::View* button_strip_extra_view_;
 
@@ skipping 31 matching lines @@
 
   // Delegate for the sign-in dialog's webview.
   scoped_ptr<AutofillDialogSignInDelegate> sign_in_delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(AutofillDialogViews);
 };
 
 }  // namespace autofill
 
 #endif  // CHROME_BROWSER_UI_VIEWS_AUTOFILL_AUTOFILL_DIALOG_VIEWS_H_