MacViews: Implement SetCursor

ui/views/cocoa/bridged_native_widget.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_native_widget.h"
 
 #import <objc/runtime.h>
 
 #include "base/logging.h"
 #include "base/mac/mac_util.h"
@@ skipping 186 matching lines @@
   }
   DCHECK(window_visible_);
 }
 
 void BridgedNativeWidget::AcquireCapture() {
   DCHECK(!HasCapture());
   if (!window_visible_)
     return;  // Capture on hidden windows is disallowed.
 
   mouse_capture_.reset(new CocoaMouseCapture(this));
+
+  // Initiating global event capture with addGlobalMonitorForEventsMatchingMask:
+  // will reset the mouse cursor to an arrow. Asking the window for an update
+  // here will restore what we want. However, it can sometimes cause the cursor
+  // to flicker, once, on the initial mouseDown.
+  // TOOD(tapted): Make this unnecessary by only asking for global mouse capture
+  // for the cases that need it (e.g. menus, but not drag and drop).
+  [window_ cursorUpdate:[NSApp currentEvent]];
 }
 
 void BridgedNativeWidget::ReleaseCapture() {
   mouse_capture_.reset();
 }
 
 bool BridgedNativeWidget::HasCapture() {
   return mouse_capture_ && mouse_capture_->IsActive();
 }
 
 void BridgedNativeWidget::SetNativeWindowProperty(const char* name,
                                                   void* value) {
   NSString* key = [NSString stringWithUTF8String:name];
   if (value) {
     [GetWindowProperties() setObject:[NSValue valueWithPointer:value]
                               forKey:key];
   } else {
     [GetWindowProperties() removeObjectForKey:key];
   }
 }
 
 void* BridgedNativeWidget::GetNativeWindowProperty(const char* name) const {
   NSString* key = [NSString stringWithUTF8String:name];
   return [[GetWindowProperties() objectForKey:key] pointerValue];
 }
 
+void BridgedNativeWidget::SetCursor(NSCursor* cursor) {
+  [window_delegate_ setCursor:cursor];
+}
+
 void BridgedNativeWidget::OnWindowWillClose() {
   if (parent_)
     parent_->RemoveChildWindow(this);
   [window_ setDelegate:nil];
   [[NSNotificationCenter defaultCenter] removeObserver:window_delegate_];
   native_widget_mac_->OnWindowWillClose();
 }
 
 void BridgedNativeWidget::OnFullscreenTransitionStart(
     bool target_fullscreen_state) {
@@ skipping 442 matching lines @@
       window_, &kWindowPropertiesKey);
   if (!properties) {
     properties = [NSMutableDictionary dictionary];
     objc_setAssociatedObject(window_, &kWindowPropertiesKey,
                              properties, OBJC_ASSOCIATION_RETAIN);
   }
   return properties;
 }
 
 }  // namespace views