Mac: give visual feedback for bookmark button drags.

chrome/browser/cocoa/bookmark_bar_controller.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_COCOA_BOOKMARK_BAR_CONTROLLER_H_
 #define CHROME_BROWSER_COCOA_BOOKMARK_BAR_CONTROLLER_H_
 
 #import <Cocoa/Cocoa.h>
 #include <map>
 
@@ skipping 149 matching lines @@
 - (CGFloat)toolbarDividerOpacity;
 
 // Returns true if at least one bookmark was added.
 - (BOOL)addURLs:(NSArray*)urls withTitles:(NSArray*)titles at:(NSPoint)point;
 
 // Updates the sizes and positions of the subviews.
 // TODO(viettrungluu): I'm not convinced this should be public, but I currently
 // need it for animations. Try not to propagate its use.
 - (void)layoutSubviews;
 
-// Complete a drag of a bookmark button to this location on the main bar.
+// Complete a drag of a bookmark button to the given point (given in window
+// coordinates) on the main bar.
 // TODO(jrg): submenu DnD.
 // Returns YES on success.
 - (BOOL)dragButton:(BookmarkButton*)sourceButton to:(NSPoint)point;
 
+// The x-coordinate of (the middle of) the indicator to draw for a drag of the
+// source button to the given point (given in window coordinates).
+// TODO(viettrungluu,jrg): instead of this, make buttons move around.
+- (CGFloat)indicatorPosForDragOfButton:(BookmarkButton*)sourceButton
+                               toPoint:(NSPoint)point;
+
 // Actions for manipulating bookmarks.
 // From a button, ...
 - (IBAction)openBookmark:(id)sender;
 - (IBAction)openFolderMenuFromButton:(id)sender;
 // From a context menu over the button, ...
 - (IBAction)openBookmarkInNewForegroundTab:(id)sender;
 - (IBAction)openBookmarkInNewWindow:(id)sender;
 - (IBAction)openBookmarkInIncognitoWindow:(id)sender;
 - (IBAction)editBookmark:(id)sender;
 - (IBAction)copyBookmark:(id)sender;
@@ skipping 44 matching lines @@
 - (int32)menuTagFromNodeId:(int64)menuid;
 - (void)buildOffTheSideMenu;
 - (NSMenu*)offTheSideMenu;
 - (NSButton*)offTheSideButton;
 - (NSButton*)otherBookmarksButton;
 - (BookmarkNode*)nodeFromMenuItem:(id)sender;
 - (void)updateTheme:(GTMTheme*)theme;
 @end
 
 #endif  // CHROME_BROWSER_COCOA_BOOKMARK_BAR_CONTROLLER_H_