Switch to doing user-resizing via system for panels on Mac

chrome/browser/ui/cocoa/panels/panel_window_controller_cocoa.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_COCOA_PANELS_PANEL_WINDOW_CONTROLLER_COCOA_H_
 #define CHROME_BROWSER_UI_COCOA_PANELS_PANEL_WINDOW_CONTROLLER_COCOA_H_
 
 // A class acting as the Objective-C controller for the Panel window
 // object. Handles interactions between Cocoa and the cross-platform
 // code. Each window has a single titlebar and is managed/owned by Panel.
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/mac/scoped_nsobject.h"
 #include "base/memory/scoped_ptr.h"
 #import "chrome/browser/ui/cocoa/chrome_browser_window.h"
 #include "chrome/browser/ui/panels/panel.h"
+#import "ui/base/cocoa/tracking_area.h"
 
 class PanelCocoa;
 @class PanelTitlebarViewCocoa;
 
 @interface PanelWindowCocoaImpl : ChromeBrowserWindow {
 }
 @end
 
 @interface PanelWindowControllerCocoa : NSWindowController
                                             <NSWindowDelegate,
                                              NSAnimationDelegate> {
  @private
   IBOutlet PanelTitlebarViewCocoa* titlebar_view_;
   scoped_ptr<PanelCocoa> windowShim_;
   base::scoped_nsobject<NSString> pendingWindowTitle_;
   NSViewAnimation* boundsAnimation_;  // Lifetime controlled manually, needs
                                       // more then just |release| to terminate.
   BOOL animateOnBoundsChange_;
   BOOL throbberShouldSpin_;
   BOOL playingMinimizeAnimation_;
   float animationStopToShowTitlebarOnly_;
   BOOL canBecomeKeyWindow_;
   // Allow a panel to become key if activated via Panel logic, as opposed
   // to by default system selection. The system will prefer a panel
   // window over other application windows due to panels having a higher
   // priority NSWindowLevel, so we distinguish between the two scenarios.
   BOOL activationRequestedByPanel_;
-  base::scoped_nsobject<NSView> overlayView_;
+  // Is user resizing in progress?
+  BOOL userResizing_;
+  // Tracks the whole window in order to receive NSMouseMoved event.
+  ui::ScopedCrTrackingArea trackingArea_;
 }
 
 // Load the window nib and do any Cocoa-specific initialization.
 - (id)initWithPanel:(PanelCocoa*)window;
 
+- (Panel*)panel;
+
 - (void)webContentsInserted:(content::WebContents*)contents;
 - (void)webContentsDetached:(content::WebContents*)contents;
 
 - (void)updateWebContentsViewFrame;
 
 // Sometimes (when we animate the size of the window) we want to stop resizing
 // the WebContents's Cocoa view to avoid unnecessary rendering and issues
 // that can be caused by sizes near 0.
 - (void)disableWebContentsViewAutosizing;
 - (void)enableWebContentsViewAutosizing;
@@ skipping 69 matching lines @@
 
 // Adjust NSStatusWindowLevel based on whether panel is always on top
 // and whether the panel is minimized. The first version wraps the second
 // version using the current panel expanstion state.
 - (void)updateWindowLevel;
 - (void)updateWindowLevel:(BOOL)panelIsMinimized;
 
 // Adjusts NSWindowCollectionBehavior based on whether panel is always on top.
 - (void)updateWindowCollectionBehavior;
 
-// Turns on user-resizable corners/sides indications and enables live resize.
-- (void)enableResizeByMouse:(BOOL)enable;
+// Updates the tracking area per the window size change. This is needed in
+// order to receive the NSMouseMoved notification.
+- (void)updateTrackingArea;
 
 // Turns on/off shadow effect around the window shape.
 - (void)showShadow:(BOOL)show;
 
 // Minimize the window to the dock.
 - (void)miniaturize;
 // Returns true if the window is minimized to the dock.
 - (BOOL)isMiniaturized;
 
+// Returns true if the user-resizing is allowed for the edge/corner close to
+// current mouse location.
+- (BOOL)canResizeByMouseAtCurrentLocation;
+
 - (NSRect)frameRectForContentRect:(NSRect)contentRect;
 - (NSRect)contentRectForFrameRect:(NSRect)frameRect;
 
 @end  // @interface PanelWindowController
 
 #endif  // CHROME_BROWSER_UI_COCOA_PANELS_PANEL_WINDOW_CONTROLLER_COCOA_H_