The Tor Browser / file revision

 /* This Source Code Form is subject to the terms of the Mozilla Public

  * License, v. 2.0. If a copy of the MPL was not distributed with this

  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

 #include "nsISupports.idl"

 interface nsIDOMDragEvent;

 interface nsIURI;

 [scriptable, uuid(6B58A5A7-76D0-4E93-AB2E-4DE108683FF8)]

 interface nsIDroppedLinkHandler : nsISupports

 {

   /**

    * Determines if a link being dragged can be dropped and returns true if so.

    * aEvent should be a dragenter or dragover event.

    *

    * If aAllowSameDocument is false, drops are only allowed if the document

    * of the source of the drag is different from the destination. This check

    * includes any parent, sibling and child frames in the same content tree.

    * If true, the source is not checked.

    */

   boolean canDropLink(in nsIDOMDragEvent aEvent, in boolean aAllowSameDocument);

   /**

    * Given a drop event aEvent, determines the link being dragged and returns

    * it. If a uri is returned the caller can, for instance, load it. If null

    * is returned, there is no valid link to be dropped.

    *

    * A NS_ERROR_DOM_SECURITY_ERR error will be thrown and the event cancelled if

    * the receiving target should not load the uri for security reasons. This

    * will occur if any of the following conditions are true:

    *  - the source of the drag initiated a link for dragging that

    *    it itself cannot access. This prevents a source document from tricking

    *    the user into a dragging a chrome url, for example.

    *  - aDisallowInherit is true, and the URI being dropped would inherit the

    *    current document's security context (URI_INHERITS_SECURITY_CONTEXT).

    *

    * aName is filled in with the link title if it exists, or an empty string

    * otherwise.

    */

   AString dropLink(in nsIDOMDragEvent aEvent, out AString aName,

                    [optional] in boolean aDisallowInherit);

 };