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comparison: content/base/src/nsContentAreaDragDrop.h
content/base/src/nsContentAreaDragDrop.h
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| 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/. */ | |
| 4 | |
| 5 | |
| 6 #ifndef nsContentAreaDragDrop_h__ | |
| 7 #define nsContentAreaDragDrop_h__ | |
| 8 | |
| 9 | |
| 10 #include "nsCOMPtr.h" | |
| 11 | |
| 12 #include "nsIDOMEventListener.h" | |
| 13 #include "nsITransferable.h" | |
| 14 | |
| 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; | |
| 24 | |
| 25 namespace mozilla { | |
| 26 namespace dom { | |
| 27 class DataTransfer; | |
| 28 } | |
| 29 } | |
| 30 | |
| 31 // | |
| 32 // class nsContentAreaDragDrop, used to generate the dragdata | |
| 33 // | |
| 34 class nsContentAreaDragDrop | |
| 35 { | |
| 36 public: | |
| 37 | |
| 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 }; | |
| 65 | |
| 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 | |
| 74 | |
| 75 virtual ~nsContentAreaDragDropDataProvider() {} | |
| 76 | |
| 77 nsresult SaveURIToFile(nsAString& inSourceURIString, | |
| 78 nsIFile* inDestFile, bool isPrivate); | |
| 79 }; | |
| 80 | |
| 81 | |
| 82 #endif /* nsContentAreaDragDrop_h__ */ | |
| 83 |
