1 files changed, 74 insertions, 0 deletions
diff --git a/chrome/browser/tab_contents/web_drop_target.h b/chrome/browser/tab_contents/web_drop_target.h
new file mode 100644
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+++ b/chrome/browser/tab_contents/web_drop_target.h
@@ -0,0 +1,74 @@
+// Copyright (c) 2006-2008 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_WEB_DROP_TARGET_H__
+#define CHROME_BROWSER_WEB_DROP_TARGET_H__
+
+#include "base/base_drop_target.h"
+#include "base/scoped_ptr.h"
+
+class InterstitialDropTarget;
+class RenderViewHost;
+class WebContents;
+
+///////////////////////////////////////////////////////////////////////////////
+//
+// WebDropTarget
+//
+//  A helper object that provides drop capabilities to a WebContents. The
+//  DropTarget handles drags that enter the region of the WebContents by
+//  passing on the events to the renderer.
+//
+class WebDropTarget : public BaseDropTarget {
+ public:
+  // Create a new WebDropTarget associating it with the given HWND and
+  // WebContents.
+  WebDropTarget(HWND source_hwnd, WebContents* contents);
+  virtual ~WebDropTarget();
+
+  void set_is_drop_target(bool is_drop_target) {
+    is_drop_target_ = is_drop_target;
+  }
+
+ protected:
+  virtual DWORD OnDragEnter(IDataObject* data_object,
+                            DWORD key_state,
+                            POINT cursor_position,
+                            DWORD effect);
+
+  virtual DWORD OnDragOver(IDataObject* data_object,
+                           DWORD key_state,
+                           POINT cursor_position,
+                           DWORD effect);
+
+  virtual void OnDragLeave(IDataObject* data_object);
+
+  virtual DWORD OnDrop(IDataObject* data_object,
+                       DWORD key_state,
+                       POINT cursor_position,
+                       DWORD effect);
+
+ private:
+  // Our associated WebContents.
+  WebContents* web_contents_;
+
+  // We keep track of the render view host we're dragging over.  If it changes
+  // during a drag, we need to re-send the DragEnter message.  WARNING:
+  // this pointer should never be dereferenced.  We only use it for comparing
+  // pointers.
+  RenderViewHost* current_rvh_;
+
+  // Used to determine what cursor we should display when dragging over web
+  // content area.  This can be updated async during a drag operation.
+  bool is_drop_target_;
+
+  // A special drop target handler for when we try to d&d while an interstitial
+  // page is showing.
+  scoped_ptr<InterstitialDropTarget> interstitial_drop_target_;
+
+  DISALLOW_EVIL_CONSTRUCTORS(WebDropTarget);
+};
+
+#endif  // #ifndef CHROME_BROWSER_WEB_DROP_TARGET_H__
+