forked from mirrors/gecko-dev
ba1b11b334
Differential Revision: https://phabricator.services.mozilla.com/D13728 --HG-- extra : moz-landing-system : lando
77 lines
3 KiB
C++
77 lines
3 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef nsContentAreaDragDrop_h__
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#define nsContentAreaDragDrop_h__
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#include "nsCOMPtr.h"
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#include "nsIDOMEventListener.h"
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#include "nsITransferable.h"
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class nsPIDOMWindowOuter;
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class nsITransferable;
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class nsIContent;
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class nsIFile;
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namespace mozilla {
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namespace dom {
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class DataTransfer;
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class Selection;
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} // namespace dom
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} // namespace mozilla
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//
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// class nsContentAreaDragDrop, used to generate the dragdata
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//
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class nsContentAreaDragDrop {
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public:
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/**
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* Determine what data in the content area, if any, is being dragged.
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*
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* aWindow - the window containing the target node
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* aTarget - the mousedown event target that started the drag
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* aSelectionTargetNode - the node where the drag event should be fired
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* aIsAltKeyPressed - true if the Alt key is pressed. In some cases, this
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* will prevent the drag from occuring. For example,
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* holding down Alt over a link should select the text,
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* not drag the link.
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* aDataTransfer - the dataTransfer for the drag event.
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* aCanDrag - [out] set to true if the drag may proceed, false to stop the
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* drag entirely
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* aSelection - [out] set to the selection being dragged, or null if no
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* selection is being dragged.
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* aDragNode - [out] the link, image or area being dragged, or null if the
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* drag occurred on another element.
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* aPrincipal - [out] set to the triggering principal of the drag, or null if
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* it's from browser chrome or OS
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*/
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static nsresult GetDragData(nsPIDOMWindowOuter* aWindow, nsIContent* aTarget,
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nsIContent* aSelectionTargetNode,
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bool aIsAltKeyPressed,
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mozilla::dom::DataTransfer* aDataTransfer,
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bool* aCanDrag,
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mozilla::dom::Selection** aSelection,
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nsIContent** aDragNode,
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nsIPrincipal** aPrincipal);
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};
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// this is used to save images to disk lazily when the image data is asked for
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// during the drop instead of when it is added to the drag data transfer. This
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// ensures that the image data is only created when an image drop is allowed.
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class nsContentAreaDragDropDataProvider : public nsIFlavorDataProvider {
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virtual ~nsContentAreaDragDropDataProvider() {}
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public:
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NS_DECL_ISUPPORTS
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NS_DECL_NSIFLAVORDATAPROVIDER
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nsresult SaveURIToFile(nsIURI* inSourceURI,
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nsIPrincipal* inTriggeringPrincipal,
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nsIFile* inDestFile, bool isPrivate);
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};
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#endif /* nsContentAreaDragDrop_h__ */
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