Mac: implement DnD of URLs onto Omnibox.

chrome/browser/cocoa/autocomplete_text_field.mm

 // 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.
 
 #import "chrome/browser/cocoa/autocomplete_text_field.h"
 
 #include "base/logging.h"
 #import "chrome/browser/cocoa/autocomplete_text_field_cell.h"
+#import "chrome/browser/cocoa/browser_window_controller.h"
+#import "chrome/browser/cocoa/toolbar_controller.h"
+#import "chrome/browser/cocoa/url_drop_target.h"
 
 @implementation AutocompleteTextField
 
 @synthesize observer = observer_;
 
 + (Class)cellClass {
   return [AutocompleteTextFieldCell class];
 }
 
 - (void)dealloc {
   [[NSNotificationCenter defaultCenter] removeObserver:self];
   [super dealloc];
 }
 
 - (void)awakeFromNib {
   DCHECK([[self cell] isKindOfClass:[AutocompleteTextFieldCell class]]);
+  dropHandler_.reset([[URLDropTargetHandler alloc] initWithView:self]);
 }
 
 - (void)flagsChanged:(NSEvent*)theEvent {
   if (observer_) {
     const bool controlFlag = ([theEvent modifierFlags]&NSControlKeyMask) != 0;
     observer_->OnControlKeyChanged(controlFlag);
   }
 }
 
 - (AutocompleteTextFieldCell*)autocompleteTextFieldCell {
@@ skipping 208 matching lines @@
 - (void)viewDidMoveToWindow {
   if ([self window]) {
     NSNotificationCenter* nc = [NSNotificationCenter defaultCenter];
     [nc addObserver:self
            selector:@selector(windowDidResignKey:)
                name:NSWindowDidResignKeyNotification
              object:[self window]];
   }
 }
 
+// (URLDropTarget protocol)
+- (id<URLDropTargetController>)urlDropController {
+  BrowserWindowController* windowController = [[self window] windowController];
+  DCHECK([windowController isKindOfClass:[BrowserWindowController class]]);
+  return [windowController toolbarController];
+}
+
+// (URLDropTarget protocol)
+- (NSDragOperation)draggingEntered:(id<NSDraggingInfo>)sender {
+  // Make ourself the first responder, which will select the text to indicate
+  // that our contents would be replaced by a drop.
+  // TODO(viettrungluu): crbug.com/30809 -- this is a hack since it steals focus
+  // and doesn't return it.
+  [[self window] makeFirstResponder:self];
+  return [dropHandler_ draggingEntered:sender];
+}
+
+// (URLDropTarget protocol)
+- (NSDragOperation)draggingUpdated:(id<NSDraggingInfo>)sender {
+  return [dropHandler_ draggingUpdated:sender];
+}
+
+// (URLDropTarget protocol)
+- (void)draggingExited:(id<NSDraggingInfo>)sender {
+  return [dropHandler_ draggingExited:sender];
+}
+
+// (URLDropTarget protocol)
+- (BOOL)performDragOperation:(id<NSDraggingInfo>)sender {
+  return [dropHandler_ performDragOperation:sender];
+}
+
 @end