- Add CefDragHandler to support examination of drag data and cancellation of drag requests (issue #297).

- Mac: Fix dragging of URLs by providing a default image if no drag image is supplied.

git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@279 5089003a-bbd8-11dd-ad1f-f1f9622dbc98

libcef/web_drop_target_win.h

@@ -11,9 +11,7 @@
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebDragOperation.h"
 #include "ui/base/dragdrop/drop_target.h"
 
-namespace WebKit {
-class WebView;
-};
+class CefBrowserImpl;
 class WebViewHost;
 
 // A helper object that provides drop capabilities to a WebView. The
@@ -23,7 +21,7 @@ class WebDropTarget : public ui::DropTarget {
  public:
   // Create a new WebDropTarget associating it with the given HWND and
   // WebView.
-  WebDropTarget(HWND source_hwnd, WebKit::WebView* view);
+  WebDropTarget(CefBrowserImpl* browser);
   virtual ~WebDropTarget();
 
   void set_drag_cursor(WebKit::WebDragOperation op) {
@@ -49,8 +47,8 @@ class WebDropTarget : public ui::DropTarget {
                        DWORD effect);
 
  private:
-  // Our associated WebView.
-  WebKit::WebView* view_;
+  // Our associated CefBrowserImpl.
+  CefBrowserImpl* browser_;
 
   // We keep track of the web view host we're dragging over.  If it changes
   // during a drag, we need to re-send the DragEnter message.  WARNING:
@@ -62,6 +60,9 @@ class WebDropTarget : public ui::DropTarget {
   // content area.  This can be updated async during a drag operation.
   WebKit::WebDragOperation drag_cursor_;
 
+  // True if the drag has been canceled.
+  bool canceled_;
+
   DISALLOW_COPY_AND_ASSIGN(WebDropTarget);
 };