The Tor Browser: content/base/src/nsContentAreaDragDrop.h@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

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

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

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

     6 #ifndef nsContentAreaDragDrop_h__

     7 #define nsContentAreaDragDrop_h__

    10 #include "nsCOMPtr.h"

    12 #include "nsIDOMEventListener.h"

    13 #include "nsITransferable.h"

    15 class nsIDOMNode;

    16 class nsPIDOMWindow;

    17 class nsIDOMDragEvent;

    18 class nsISelection;

    19 class nsITransferable;

    20 class nsIContent;

    21 class nsIURI;

    22 class nsIFile;

    23 class nsISimpleEnumerator;

    25 namespace mozilla {

    26 namespace dom {

    27 class DataTransfer;

    28 }

    29 }

    31 //

    32 // class nsContentAreaDragDrop, used to generate the dragdata

    33 //

    34 class nsContentAreaDragDrop

    35 {

    36 public:

    38   /**

    39    * Determine what data in the content area, if any, is being dragged.

    40    *

    41    * aWindow - the window containing the target node

    42    * aTarget - the mousedown event target that started the drag

    43    * aSelectionTargetNode - the node where the drag event should be fired

    44    * aIsAltKeyPressed - true if the Alt key is pressed. In some cases, this

    45    *                    will prevent the drag from occuring. For example,

    46    *                    holding down Alt over a link should select the text,

    47    *                    not drag the link.

    48    * aDataTransfer - the dataTransfer for the drag event.

    49    * aCanDrag - [out] set to true if the drag may proceed, false to stop the

    50    *            drag entirely

    51    * aSelection - [out] set to the selection being dragged, or null if no

    52    *                    selection is being dragged.

    53    * aDragNode - [out] the link, image or area being dragged, or null if the

    54    *             drag occurred on another element.

    55    */

    56   static nsresult GetDragData(nsPIDOMWindow* aWindow,

    57                               nsIContent* aTarget,

    58                               nsIContent* aSelectionTargetNode,

    59                               bool aIsAltKeyPressed,

    60                               mozilla::dom::DataTransfer* aDataTransfer,

    61                               bool* aCanDrag,

    62                               nsISelection** aSelection,

    63                               nsIContent** aDragNode);

    64 };

    66 // this is used to save images to disk lazily when the image data is asked for

    67 // during the drop instead of when it is added to the drag data transfer. This

    68 // ensures that the image data is only created when an image drop is allowed.

    69 class nsContentAreaDragDropDataProvider : public nsIFlavorDataProvider

    70 {

    71 public:

    72   NS_DECL_ISUPPORTS

    73   NS_DECL_NSIFLAVORDATAPROVIDER

    75   virtual ~nsContentAreaDragDropDataProvider() {}

    77   nsresult SaveURIToFile(nsAString& inSourceURIString,

    78                          nsIFile* inDestFile, bool isPrivate);

    79 };

    82 #endif /* nsContentAreaDragDrop_h__ */

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