gecko/content/base/public/nsCopySupport.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2012-05-21 04:12:37 -07:00
/* 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/. */
#ifndef nsCopySupport_h__
#define nsCopySupport_h__
#include "nscore.h"
#include "nsINode.h"
class nsISelection;
class nsIDocument;
class nsIImageLoadingContent;
class nsIContent;
class nsITransferable;
class nsACString;
class nsAString;
class nsIPresShell;
class nsCopySupport
{
// class of static helper functions for copy support
public:
static nsresult HTMLCopy(nsISelection *aSel, nsIDocument *aDoc, PRInt16 aClipboardID);
static nsresult DoHooks(nsIDocument *aDoc, nsITransferable *aTrans,
bool *aDoPutOnClipboard);
static nsresult IsPlainTextContext(nsISelection *aSel, nsIDocument *aDoc, bool *aIsPlainTextContext);
// Get the selection, or entire document, in the format specified by the mime type
// (text/html or text/plain). If aSel is non-null, use it, otherwise get the entire
// doc.
static nsresult GetContents(const nsACString& aMimeType, PRUint32 aFlags, nsISelection *aSel, nsIDocument *aDoc, nsAString& outdata);
static nsresult ImageCopy(nsIImageLoadingContent* aImageElement,
PRInt32 aCopyFlags);
// Get the selection as a transferable. Similar to HTMLCopy except does
// not deal with the clipboard.
static nsresult GetTransferableForSelection(nsISelection* aSelection,
nsIDocument* aDocument,
nsITransferable** aTransferable);
// Same as GetTransferableForSelection, but doesn't skip invisible content.
static nsresult GetTransferableForNode(nsINode* aNode,
nsIDocument* aDoc,
nsITransferable** aTransferable);
/**
* Retrieve the selection for the given document. If the current focus
* within the document has its own selection, aSelection will be set to it
* and this focused content node returned. Otherwise, aSelection will be
* set to the document's selection and null will be returned.
*/
static nsIContent* GetSelectionForCopy(nsIDocument* aDocument,
nsISelection** aSelection);
/**
* Returns true if a copy operation is currently permitted based on the
* current focus and selection within the specified document.
*/
static bool CanCopy(nsIDocument* aDocument);
/**
* Fires a cut, copy or paste event, on the given presshell, depending
* on the value of aType, which should be either NS_CUT, NS_COPY or
* NS_PASTE, and perform the default copy action if the event was not
* cancelled.
*
* If aSelection is specified, then this selection is used as the target
* of the operation. Otherwise, GetSelectionForCopy is used to retrieve
* the current selection.
*
* This will fire a cut, copy or paste event at the node at the start
* point of the selection. If a cut or copy event is not cancelled, the
* selection is copied to the clipboard and true is returned. Paste events
* have no default behaviour but true will be returned. It is expected
* that the caller will execute any needed default paste behaviour. Also,
* note that this method only copies text to the clipboard, the caller is
* responsible for removing the content during a cut operation if true is
* returned.
*
* If the event is cancelled or an error occurs, false will be returned.
*/
static bool FireClipboardEvent(PRInt32 aType,
nsIPresShell* aPresShell,
nsISelection* aSelection);
};
#endif