gecko-dev/editor/base/nsPlaintextEditor.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*/
#ifndef nsPlaintextEditor_h__
#define nsPlaintextEditor_h__
#include "nsCOMPtr.h"
#include "nsIPlaintextEditor.h"
#include "nsIEditorMailSupport.h"
#include "nsEditor.h"
#include "nsIDOMElement.h"
#include "nsIDOMEventListener.h"
#include "nsEditRules.h"
class nsIDOMKeyEvent;
class nsITransferable;
class nsIDOMEventReceiver;
class nsIDocumentEncoder;
/**
* The text editor implementation.
* Use to edit text document represented as a DOM tree.
*/
class nsPlaintextEditor : public nsEditor,
public nsIPlaintextEditor,
public nsIEditorMailSupport
{
public:
// Interfaces for addref and release and queryinterface
// NOTE macro used is for classes that inherit from
// another class. Only the base class should use NS_DECL_ISUPPORTS
NS_DECL_ISUPPORTS_INHERITED
/* below used by TypedText() */
enum {
eTypedText, /* user typed text */
eTypedBR, /* user typed shift-enter to get a br */
eTypedBreak /* user typed enter */
};
nsPlaintextEditor();
virtual ~nsPlaintextEditor();
/* ------------ nsIPlaintextEditor methods -------------- */
NS_DECL_NSIPLAINTEXTEDITOR
/* ------------ nsIEditorMailSupport overrides -------------- */
NS_IMETHOD PasteAsQuotation(PRInt32 aSelectionType);
NS_IMETHOD InsertAsQuotation(const nsAReadableString& aQuotedText,
nsIDOMNode** aNodeInserted);
NS_IMETHOD PasteAsCitedQuotation(const nsAReadableString& aCitation,
PRInt32 aSelectionType);
NS_IMETHOD InsertAsCitedQuotation(const nsAReadableString& aQuotedText,
const nsAReadableString& aCitation,
PRBool aInsertHTML,
const nsAReadableString& aCharset,
nsIDOMNode** aNodeInserted);
NS_IMETHOD Rewrap(PRBool aRespectNewlines);
NS_IMETHOD StripCites();
NS_IMETHOD GetEmbeddedObjects(nsISupportsArray** aNodeList);
/* ------------ nsIEditorIMESupport overrides -------------- */
NS_IMETHOD SetCompositionString(const nsAReadableString & aCompositionString, nsIPrivateTextRangeList * aTextRange, nsTextEventReply * aReply);
NS_IMETHOD GetReconversionString(nsReconversionEventReply* aReply);
/* ------------ Overrides of nsEditor interface methods -------------- */
/** prepare the editor for use */
NS_IMETHOD Init(nsIDOMDocument *aDoc, nsIPresShell *aPresShell, nsIContent *aRoot, nsISelectionController *aSelCon, PRUint32 aFlags);
NS_IMETHOD GetDocumentIsEmpty(PRBool *aDocumentIsEmpty);
NS_IMETHOD DeleteSelection(EDirection aAction);
NS_IMETHOD SetDocumentCharacterSet(const nsAReadableString & characterSet);
/** we override this here to install event listeners */
NS_IMETHOD PostCreate();
NS_IMETHOD GetFlags(PRUint32 *aFlags);
NS_IMETHOD SetFlags(PRUint32 aFlags);
NS_IMETHOD Undo(PRUint32 aCount);
NS_IMETHOD Redo(PRUint32 aCount);
NS_IMETHOD Cut();
NS_IMETHOD CanCut(PRBool *aCanCut);
NS_IMETHOD Copy();
NS_IMETHOD CanCopy(PRBool *aCanCopy);
NS_IMETHOD Paste(PRInt32 aSelectionType);
NS_IMETHOD CanPaste(PRInt32 aSelectionType, PRBool *aCanPaste);
NS_IMETHOD CanDrag(nsIDOMEvent *aDragEvent, PRBool *aCanDrag);
NS_IMETHOD DoDrag(nsIDOMEvent *aDragEvent);
NS_IMETHOD InsertFromDrop(nsIDOMEvent* aDropEvent);
NS_IMETHOD OutputToString(nsAWritableString& aOutputString,
const nsAReadableString& aFormatType,
PRUint32 aFlags);
NS_IMETHOD OutputToStream(nsIOutputStream* aOutputStream,
const nsAReadableString& aFormatType,
const nsAReadableString& aCharsetOverride,
PRUint32 aFlags);
/** All editor operations which alter the doc should be prefaced
* with a call to StartOperation, naming the action and direction */
NS_IMETHOD StartOperation(PRInt32 opID, nsIEditor::EDirection aDirection);
/** All editor operations which alter the doc should be followed
* with a call to EndOperation */
NS_IMETHOD EndOperation();
/** make the given selection span the entire document */
NS_IMETHOD SelectEntireDocument(nsISelection *aSelection);
/* ------------ Utility Routines, not part of public API -------------- */
NS_IMETHOD TypedText(const nsAReadableString& aString, PRInt32 aAction);
/** returns the absolute position of the end points of aSelection
* in the document as a text stream.
*/
nsresult GetTextSelectionOffsets(nsISelection *aSelection,
PRInt32 &aStartOffset,
PRInt32 &aEndOffset);
nsresult GetAbsoluteOffsetsForPoints(nsIDOMNode *aInStartNode,
PRInt32 aInStartOffset,
nsIDOMNode *aInEndNode,
PRInt32 aInEndOffset,
nsIDOMNode *aInCommonParentNode,
PRInt32 &aOutStartOffset,
PRInt32 &aEndOffset);
protected:
NS_IMETHOD InitRules();
void BeginEditorInit();
nsresult EndEditorInit();
/** install the event listeners for the editor
* used to be part of Init, but now broken out into a separate method
* called by PostCreate, giving the caller the chance to interpose
* their own listeners before we install our own backstops.
*/
NS_IMETHOD InstallEventListeners();
/** returns the layout object (nsIFrame in the real world) for aNode
* @param aNode the content to get a frame for
* @param aLayoutObject the "primary frame" for aNode, if one exists. May be null
* @return NS_OK whether a frame is found or not
* an error if some serious error occurs
*/
NS_IMETHOD GetLayoutObject(nsIDOMNode *aInNode, nsISupports **aOutLayoutObject);
NS_IMETHOD GetBodyStyleContext(nsIStyleContext** aStyleContext);
// Helpers for output routines
NS_IMETHOD GetAndInitDocEncoder(const nsAReadableString& aFormatType,
PRUint32 aFlags,
const nsAReadableString& aCharset,
nsIDocumentEncoder** encoder);
// key event helpers
NS_IMETHOD CreateBR(nsIDOMNode *aNode, PRInt32 aOffset,
nsCOMPtr<nsIDOMNode> *outBRNode, EDirection aSelect = eNone);
NS_IMETHOD CreateBRImpl(nsCOMPtr<nsIDOMNode> *aInOutParent,
PRInt32 *aInOutOffset,
nsCOMPtr<nsIDOMNode> *outBRNode,
EDirection aSelect);
NS_IMETHOD InsertBR(nsCOMPtr<nsIDOMNode> *outBRNode);
NS_IMETHOD IsRootTag(nsString &aTag, PRBool &aIsTag);
// factored methods for handling insertion of data from transferables (drag&drop or clipboard)
NS_IMETHOD PrepareTransferable(nsITransferable **transferable);
NS_IMETHOD InsertTextFromTransferable(nsITransferable *transferable);
/** simple utility to handle any error with event listener allocation or registration */
void HandleEventListenerError();
/* small utility routine to test the eEditorReadonly bit */
PRBool IsModifiable();
nsresult GetDOMEventReceiver(nsIDOMEventReceiver **aEventReceiver);
//XXX Kludge: Used to suppress spurious drag/drop events (bug 50703)
PRBool mIgnoreSpuriousDragEvent;
NS_IMETHOD IgnoreSpuriousDragEvent(PRBool aIgnoreSpuriousDragEvent) {mIgnoreSpuriousDragEvent = aIgnoreSpuriousDragEvent; return NS_OK;}
// Data members
protected:
nsCOMPtr<nsIEditRules> mRules;
nsCOMPtr<nsIDOMEventListener> mKeyListenerP;
nsCOMPtr<nsIDOMEventListener> mMouseListenerP;
nsCOMPtr<nsIDOMEventListener> mTextListenerP;
nsCOMPtr<nsIDOMEventListener> mCompositionListenerP;
nsCOMPtr<nsIDOMEventListener> mDragListenerP;
nsCOMPtr<nsIDOMEventListener> mFocusListenerP;
PRBool mIsComposing;
PRInt32 mMaxTextLength;
PRInt32 mInitTriggerCounter;
// friends
friend class nsHTMLEditRules;
friend class nsTextEditRules;
friend class nsAutoEditInitRulesTrigger;
};
#endif //nsPlaintextEditor_h__