1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/base/src/nsContentAreaDragDrop.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,83 @@
1.4 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.5 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.6 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.7 +
1.8 +
1.9 +#ifndef nsContentAreaDragDrop_h__
1.10 +#define nsContentAreaDragDrop_h__
1.11 +
1.12 +
1.13 +#include "nsCOMPtr.h"
1.14 +
1.15 +#include "nsIDOMEventListener.h"
1.16 +#include "nsITransferable.h"
1.17 +
1.18 +class nsIDOMNode;
1.19 +class nsPIDOMWindow;
1.20 +class nsIDOMDragEvent;
1.21 +class nsISelection;
1.22 +class nsITransferable;
1.23 +class nsIContent;
1.24 +class nsIURI;
1.25 +class nsIFile;
1.26 +class nsISimpleEnumerator;
1.27 +
1.28 +namespace mozilla {
1.29 +namespace dom {
1.30 +class DataTransfer;
1.31 +}
1.32 +}
1.33 +
1.34 +//
1.35 +// class nsContentAreaDragDrop, used to generate the dragdata
1.36 +//
1.37 +class nsContentAreaDragDrop
1.38 +{
1.39 +public:
1.40 +
1.41 + /**
1.42 + * Determine what data in the content area, if any, is being dragged.
1.43 + *
1.44 + * aWindow - the window containing the target node
1.45 + * aTarget - the mousedown event target that started the drag
1.46 + * aSelectionTargetNode - the node where the drag event should be fired
1.47 + * aIsAltKeyPressed - true if the Alt key is pressed. In some cases, this
1.48 + * will prevent the drag from occuring. For example,
1.49 + * holding down Alt over a link should select the text,
1.50 + * not drag the link.
1.51 + * aDataTransfer - the dataTransfer for the drag event.
1.52 + * aCanDrag - [out] set to true if the drag may proceed, false to stop the
1.53 + * drag entirely
1.54 + * aSelection - [out] set to the selection being dragged, or null if no
1.55 + * selection is being dragged.
1.56 + * aDragNode - [out] the link, image or area being dragged, or null if the
1.57 + * drag occurred on another element.
1.58 + */
1.59 + static nsresult GetDragData(nsPIDOMWindow* aWindow,
1.60 + nsIContent* aTarget,
1.61 + nsIContent* aSelectionTargetNode,
1.62 + bool aIsAltKeyPressed,
1.63 + mozilla::dom::DataTransfer* aDataTransfer,
1.64 + bool* aCanDrag,
1.65 + nsISelection** aSelection,
1.66 + nsIContent** aDragNode);
1.67 +};
1.68 +
1.69 +// this is used to save images to disk lazily when the image data is asked for
1.70 +// during the drop instead of when it is added to the drag data transfer. This
1.71 +// ensures that the image data is only created when an image drop is allowed.
1.72 +class nsContentAreaDragDropDataProvider : public nsIFlavorDataProvider
1.73 +{
1.74 +public:
1.75 + NS_DECL_ISUPPORTS
1.76 + NS_DECL_NSIFLAVORDATAPROVIDER
1.77 +
1.78 + virtual ~nsContentAreaDragDropDataProvider() {}
1.79 +
1.80 + nsresult SaveURIToFile(nsAString& inSourceURIString,
1.81 + nsIFile* inDestFile, bool isPrivate);
1.82 +};
1.83 +
1.84 +
1.85 +#endif /* nsContentAreaDragDrop_h__ */
1.86 +
