MacViews: Implement Tab Dragging

ui/views/cocoa/bridged_content_view.mm

 // Copyright 2014 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.
 
 #import "ui/views/cocoa/bridged_content_view.h"
 
 #include "base/logging.h"
 #import "base/mac/mac_util.h"
 #import "base/mac/scoped_nsobject.h"
 #include "base/strings/sys_string_conversions.h"
@@ skipping 17 matching lines @@
 #include "ui/views/view.h"
 #include "ui/views/widget/widget.h"
 
 using views::MenuController;
 
 namespace {
 
 NSString* const kFullKeyboardAccessChangedNotification =
     @"com.apple.KeyboardUIModeDidChange";
 
+// We're sending simulated mouse events in CocoaWindowMoveLoop, and don't want
+// BridgedContentView to react when we're starting/ending the RunMoveLoop.
+// When reattaching the dragged tab we're sending the mouse down event to the
+// parent window we don't have the pointer to, so this flag is global for the
+// RunMoveLoop.
+bool g_ignore_mouse_events = false;
+
 // Returns true if all four corners of |rect| are contained inside |path|.
 bool IsRectInsidePath(NSRect rect, NSBezierPath* path) {
   return [path containsPoint:rect.origin] &&
          [path containsPoint:NSMakePoint(rect.origin.x + rect.size.width,
                                          rect.origin.y)] &&
          [path containsPoint:NSMakePoint(rect.origin.x,
                                          rect.origin.y + rect.size.height)] &&
          [path containsPoint:NSMakePoint(rect.origin.x + rect.size.width,
                                          rect.origin.y + rect.size.height)];
 }
@@ skipping 221 matching lines @@
                name:kFullKeyboardAccessChangedNotification
              object:nil];
 
     // Initialize the focus manager with the correct keyboard accessibility
     // setting.
     [self updateFullKeyboardAccess];
   }
   return self;
 }
 
++ (void)setIgnoreMouseEvents:(BOOL)flag {
+  g_ignore_mouse_events = flag;
+}
+
 - (void)clearView {
   textInputClient_ = nullptr;
   hostedView_ = nullptr;
   [[NSDistributedNotificationCenter defaultCenter] removeObserver:self];
   [cursorTrackingArea_.get() clearOwner];
   [self removeTrackingArea:cursorTrackingArea_.get()];
 }
 
 - (void)processCapturedMouseEvent:(NSEvent*)theEvent {
   if (!hostedView_)
@@ skipping 163 matching lines @@
 // BaseView implementation.
 
 // Don't use tracking areas from BaseView. BridgedContentView's tracks
 // NSTrackingCursorUpdate and Apple's documentation suggests it's incompatible.
 - (void)enableTracking {
 }
 
 // Translates the location of |theEvent| to toolkit-views coordinates and passes
 // the event to NativeWidgetMac for handling.
 - (void)mouseEvent:(NSEvent*)theEvent {
-  if (!hostedView_)
+  if (!hostedView_ || g_ignore_mouse_events)
     return;
 
   ui::MouseEvent event(theEvent);
 
   // Aura updates tooltips with the help of aura::Window::AddPreTargetHandler().
   // Mac hooks in here.
   [self updateTooltipIfRequiredAt:event.location()];
 
   hostedView_->GetWidget()->OnMouseEvent(&event);
 }
@@ skipping 550 matching lines @@
   }
 
   return [super accessibilityAttributeValue:attribute];
 }
 
 - (id)accessibilityHitTest:(NSPoint)point {
   return [hostedView_->GetNativeViewAccessible() accessibilityHitTest:point];
 }
 
 @end