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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "nsError.h"
#include "nsIDocument.h"
#include "mozilla/EventForwards.h"
class nsINode;
class nsISelection;
class nsIDocument;
class nsIImageLoadingContent;
class nsIContent;
class nsITransferable;
class nsACString;
class nsAString;
class nsIPresShell;
class nsILoadContext;
class nsCopySupport
{
// class of static helper functions for copy support
public:
static nsresult ClearSelectionCache();
static nsresult HTMLCopy(nsISelection *aSel, nsIDocument *aDoc,
int16_t aClipboardID, bool aWithRubyAnnotation);
static nsresult DoHooks(nsIDocument *aDoc, nsITransferable *aTrans,
bool *aDoPutOnClipboard);
// 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, uint32_t aFlags, nsISelection *aSel, nsIDocument *aDoc, nsAString& outdata);
static nsresult ImageCopy(nsIImageLoadingContent* aImageElement,
nsILoadContext* aLoadContext,
int32_t 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 aEventMessage, which should be either eCut, eCopy or
* ePaste, 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.
*
* aClipboardType specifies which clipboard to use, from nsIClipboard.
*
* If aActionTaken is non-NULL, it will be set to true if an action was
* taken, whether it be the default action or the default being prevented.
*
* If the event is cancelled or an error occurs, false will be returned.
*/
static bool FireClipboardEvent(mozilla::EventMessage aEventMessage,
int32_t aClipboardType,
nsIPresShell* aPresShell,
nsISelection* aSelection,
bool* aActionTaken = nullptr);
};
#endif
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