зеркало из https://github.com/mozilla/gecko-dev.git
576 строки
24 KiB
C++
576 строки
24 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*/
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#ifndef __editor_h__
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#define __editor_h__
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#include "nsCOMPtr.h"
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#include "nsWeakReference.h"
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#include "nsIEditor.h"
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#include "nsIEditorIMESupport.h"
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#include "nsIDOMDocument.h"
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#include "nsIDiskDocument.h"
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#include "nsISelection.h"
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#include "nsIDOMCharacterData.h"
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#include "nsIDOMEventListener.h"
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#include "nsIDOMRange.h"
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#include "nsIPrivateTextRange.h"
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#include "nsITransactionManager.h"
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#include "nsIComponentManager.h"
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#include "nsISupportsArray.h"
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#include "nsIDOMCharacterData.h"
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#include "nsICSSStyleSheet.h"
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#include "nsIDTD.h"
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#include "nsIDOMElement.h"
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#include "nsVoidArray.h"
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#include "nsSelectionState.h"
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class nsIEditActionListener;
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class nsIDocumentStateListener;
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class nsIDOMCharacterData;
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class nsIDOMRange;
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class nsIPresShell;
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class nsIViewManager;
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class ChangeAttributeTxn;
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class CreateElementTxn;
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class InsertElementTxn;
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class DeleteElementTxn;
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class InsertTextTxn;
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class DeleteTextTxn;
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class SplitElementTxn;
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class JoinElementTxn;
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class EditAggregateTxn;
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class nsVoidArray;
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class nsISupportsArray;
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class nsILocale;
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class IMETextTxn;
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class AddStyleSheetTxn;
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class RemoveStyleSheetTxn;
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class nsIFile;
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class nsISelectionController;
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/** implementation of an editor object. it will be the controller/focal point
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* for the main editor services. i.e. the GUIManager, publishing, transaction
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* manager, event interfaces. the idea for the event interfaces is to have them
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* delegate the actual commands to the editor independent of the XPFE implementation.
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*/
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class nsEditor : public nsIEditor,
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public nsIEditorIMESupport,
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public nsSupportsWeakReference
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{
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public:
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enum IterDirection
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{
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kIterForward,
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kIterBackward
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};
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enum OperationID
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{
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kOpIgnore = -1,
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kOpNone = 0,
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kOpUndo,
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kOpRedo,
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kOpInsertNode,
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kOpCreateNode,
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kOpDeleteNode,
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kOpSplitNode,
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kOpJoinNode,
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kOpDeleteSelection,
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// text commands
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kOpInsertBreak = 1000,
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kOpInsertText = 1001,
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kOpInsertIMEText = 1002,
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kOpDeleteText = 1003
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};
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static const char* kMOZEditorBogusNodeAttr;
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static const char* kMOZEditorBogusNodeValue;
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/** The default constructor. This should suffice. the setting of the interfaces is done
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* after the construction of the editor class.
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*/
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nsEditor();
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/** The default destructor. This should suffice. Should this be pure virtual
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* for someone to derive from the nsEditor later? I dont believe so.
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*/
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virtual ~nsEditor();
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//Interfaces for addref and release and queryinterface
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//NOTE: Use NS_DECL_ISUPPORTS_INHERITED in any class inherited from nsEditor
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NS_DECL_ISUPPORTS
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/* ------------ utility methods -------------- */
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NS_IMETHOD GetPresShell(nsIPresShell **aPS);
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void NotifyEditorObservers(void);
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/* ------------ nsIEditor methods -------------- */
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NS_DECL_NSIEDITOR
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/* ------------ nsIEditorIMESupport methods -------------- */
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NS_IMETHOD BeginComposition(nsTextEventReply* aReply);
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NS_IMETHOD QueryComposition(nsTextEventReply* aReply);
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NS_IMETHOD SetCompositionString(const nsAReadableString& aCompositionString, nsIPrivateTextRangeList* aTextRangeList,nsTextEventReply* aReply);
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NS_IMETHOD EndComposition(void);
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NS_IMETHOD ForceCompositionEnd(void);
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NS_IMETHOD GetReconversionString(nsReconversionEventReply *aReply);
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public:
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NS_IMETHOD InsertTextImpl(const nsAReadableString& aStringToInsert,
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nsCOMPtr<nsIDOMNode> *aInOutNode,
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PRInt32 *aInOutOffset,
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nsIDOMDocument *aDoc);
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NS_IMETHOD InsertTextIntoTextNodeImpl(const nsAReadableString& aStringToInsert,
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nsIDOMCharacterData *aTextNode,
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PRInt32 aOffset);
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NS_IMETHOD DeleteSelectionImpl(EDirection aAction);
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NS_IMETHOD DeleteSelectionAndCreateNode(const nsAReadableString& aTag,
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nsIDOMNode ** aNewNode);
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/* helper routines for node/parent manipulations */
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nsresult ReplaceContainer(nsIDOMNode *inNode,
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nsCOMPtr<nsIDOMNode> *outNode,
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const nsAReadableString &aNodeType,
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const nsAReadableString *aAttribute = nsnull,
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const nsAReadableString *aValue = nsnull,
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PRBool aCloneAttributes = PR_FALSE);
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nsresult RemoveContainer(nsIDOMNode *inNode);
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nsresult InsertContainerAbove(nsIDOMNode *inNode,
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nsCOMPtr<nsIDOMNode> *outNode,
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const nsAReadableString &aNodeType,
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const nsAReadableString *aAttribute = nsnull,
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const nsAReadableString *aValue = nsnull);
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nsresult MoveNode(nsIDOMNode *aNode, nsIDOMNode *aParent, PRInt32 aOffset);
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/* Method to replace certain CreateElementNS() calls.
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Arguments:
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nsString& aTag - tag you want
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nsIContent** aContent - returned Content that was created with above namespace.
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*/
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nsresult CreateHTMLContent(const nsAReadableString& aTag, nsIContent** aContent);
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protected:
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/*
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NS_IMETHOD SetProperties(nsVoidArray *aPropList);
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NS_IMETHOD GetProperties(nsVoidArray *aPropList);
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*/
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/** create a transaction for setting aAttribute to aValue on aElement
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*/
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NS_IMETHOD CreateTxnForSetAttribute(nsIDOMElement *aElement,
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const nsAReadableString & aAttribute,
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const nsAReadableString & aValue,
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ChangeAttributeTxn ** aTxn);
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/** create a transaction for removing aAttribute on aElement
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*/
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NS_IMETHOD CreateTxnForRemoveAttribute(nsIDOMElement *aElement,
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const nsAReadableString & aAttribute,
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ChangeAttributeTxn ** aTxn);
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/** create a transaction for creating a new child node of aParent of type aTag.
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*/
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NS_IMETHOD CreateTxnForCreateElement(const nsAReadableString & aTag,
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nsIDOMNode *aParent,
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PRInt32 aPosition,
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CreateElementTxn ** aTxn);
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/** create a transaction for inserting aNode as a child of aParent.
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*/
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NS_IMETHOD CreateTxnForInsertElement(nsIDOMNode * aNode,
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nsIDOMNode * aParent,
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PRInt32 aOffset,
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InsertElementTxn ** aTxn);
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/** create a transaction for removing aElement from its parent.
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*/
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NS_IMETHOD CreateTxnForDeleteElement(nsIDOMNode * aElement,
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DeleteElementTxn ** aTxn);
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NS_IMETHOD CreateTxnForDeleteSelection(EDirection aAction,
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EditAggregateTxn ** aTxn);
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NS_IMETHOD CreateTxnForDeleteInsertionPoint(nsIDOMRange *aRange,
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EDirection aAction,
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EditAggregateTxn *aTxn);
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/** create a transaction for inserting aStringToInsert into aTextNode
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* if aTextNode is null, the string is inserted at the current selection.
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*/
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NS_IMETHOD CreateTxnForInsertText(const nsAReadableString & aStringToInsert,
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nsIDOMCharacterData *aTextNode,
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PRInt32 aOffset,
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InsertTextTxn ** aTxn);
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NS_IMETHOD CreateTxnForIMEText(const nsAReadableString & aStringToInsert,
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IMETextTxn ** aTxn);
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/** create a transaction for adding a style sheet
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*/
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NS_IMETHOD CreateTxnForAddStyleSheet(nsICSSStyleSheet* aSheet, AddStyleSheetTxn* *aTxn);
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/** create a transaction for removing a style sheet
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*/
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NS_IMETHOD CreateTxnForRemoveStyleSheet(nsICSSStyleSheet* aSheet, RemoveStyleSheetTxn* *aTxn);
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NS_IMETHOD DeleteText(nsIDOMCharacterData *aElement,
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PRUint32 aOffset,
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PRUint32 aLength);
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// NS_IMETHOD DeleteRange(nsIDOMRange *aRange);
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NS_IMETHOD CreateTxnForDeleteText(nsIDOMCharacterData *aElement,
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PRUint32 aOffset,
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PRUint32 aLength,
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DeleteTextTxn **aTxn);
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NS_IMETHOD CreateTxnForSplitNode(nsIDOMNode *aNode,
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PRUint32 aOffset,
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SplitElementTxn **aTxn);
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NS_IMETHOD CreateTxnForJoinNode(nsIDOMNode *aLeftNode,
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nsIDOMNode *aRightNode,
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JoinElementTxn **aTxn);
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NS_IMETHOD DeleteSelectionAndPrepareToCreateNode(nsCOMPtr<nsIDOMNode> &parentSelectedNode,
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PRInt32& offsetOfNewNode);
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// called each time we modify the document. Increments the mod
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// count of the doc.
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NS_IMETHOD IncDocModCount(PRInt32 inNumMods);
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// return the mod count of the doc we are editing. Zero means unchanged.
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NS_IMETHOD GetDocModCount(PRInt32 &outModCount);
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// called ONLY when we need to override the doc's modification
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// state. This should already be handled by nsIDiskDocument.
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NS_IMETHOD ResetDocModCount();
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// called after a transaction is done successfully
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NS_IMETHOD DoAfterDoTransaction(nsITransaction *aTxn);
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// called after a transaction is undone successfully
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NS_IMETHOD DoAfterUndoTransaction();
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// called after a transaction is redone successfully
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NS_IMETHOD DoAfterRedoTransaction();
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// called after the document has been saved
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NS_IMETHOD DoAfterDocumentSave();
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typedef enum {
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eDocumentCreated,
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eDocumentToBeDestroyed,
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eDocumentStateChanged
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} TDocumentListenerNotification;
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// tell the doc state listeners that the doc state has changed
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NS_IMETHOD NotifyDocumentListeners(TDocumentListenerNotification aNotificationType);
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/** make the given selection span the entire document */
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NS_IMETHOD SelectEntireDocument(nsISelection *aSelection);
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/* Helper for output routines -- we expect subclasses to override this */
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NS_IMETHOD GetWrapWidth(PRInt32* aWrapCol);
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protected:
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// XXXX: Horrible hack! We are doing this because
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// of an error in Gecko which is not rendering the
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// document after a change via the DOM - gpk 2/13/99
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void HACKForceRedraw(void);
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NS_IMETHOD ScrollIntoView(PRBool aScrollToBegin);
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public:
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/** All editor operations which alter the doc should be prefaced
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* with a call to StartOperation, naming the action and direction */
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NS_IMETHOD StartOperation(PRInt32 opID, nsIEditor::EDirection aDirection);
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/** All editor operations which alter the doc should be followed
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* with a call to EndOperation */
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NS_IMETHOD EndOperation();
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/** routines for managing the preservation of selection across
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* various editor actions */
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PRBool ArePreservingSelection();
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nsresult PreserveSelectionAcrossActions(nsISelection *aSel);
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nsresult RestorePreservedSelection(nsISelection *aSel);
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void StopPreservingSelection();
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/** return the string that represents text nodes in the content tree */
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static nsresult GetTextNodeTag(nsAWritableString& aOutString);
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/**
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* SplitNode() creates a new node identical to an existing node, and split the contents between the two nodes
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* @param aExistingRightNode the node to split. It will become the new node's next sibling.
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* @param aOffset the offset of aExistingRightNode's content|children to do the split at
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* @param aNewLeftNode [OUT] the new node resulting from the split, becomes aExistingRightNode's previous sibling.
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* @param aParent the parent of aExistingRightNode
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*/
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nsresult SplitNodeImpl(nsIDOMNode *aExistingRightNode,
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PRInt32 aOffset,
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nsIDOMNode *aNewLeftNode,
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nsIDOMNode *aParent);
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/**
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* JoinNodes() takes 2 nodes and merge their content|children.
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* @param aNodeToKeep The node that will remain after the join.
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* @param aNodeToJoin The node that will be joined with aNodeToKeep.
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* There is no requirement that the two nodes be of the same type.
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* @param aParent The parent of aNodeToKeep
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* @param aNodeToKeepIsFirst if PR_TRUE, the contents|children of aNodeToKeep come before the
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* contents|children of aNodeToJoin, otherwise their positions are switched.
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*/
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nsresult JoinNodesImpl(nsIDOMNode *aNodeToKeep,
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nsIDOMNode *aNodeToJoin,
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nsIDOMNode *aParent,
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PRBool aNodeToKeepIsFirst);
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/**
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* Set aOffset to the offset of aChild in aParent.
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* Returns an error if aChild is not an immediate child of aParent.
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*/
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static nsresult GetChildOffset(nsIDOMNode *aChild,
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nsIDOMNode *aParent,
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PRInt32 &aOffset);
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/**
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* Set aParent to the parent of aChild.
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* Set aOffset to the offset of aChild in aParent.
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*/
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static nsresult GetNodeLocation(nsIDOMNode *aChild,
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nsCOMPtr<nsIDOMNode> *aParent,
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PRInt32 *aOffset);
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/** returns the number of things inside aNode in the out-param aCount.
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* @param aNode is the node to get the length of.
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* If aNode is text, returns number of characters.
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* If not, returns number of children nodes.
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* @param aCount [OUT] the result of the above calculation.
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*/
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static nsresult GetLengthOfDOMNode(nsIDOMNode *aNode, PRUint32 &aCount);
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/** get the node immediately prior to aCurrentNode
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* @param aCurrentNode the node from which we start the search
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* @param aEditableNode if PR_TRUE, only return an editable node
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* @param aResultNode [OUT] the node that occurs before aCurrentNode in the tree,
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* skipping non-editable nodes if aEditableNode is PR_TRUE.
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* If there is no prior node, aResultNode will be nsnull.
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*/
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nsresult GetPriorNode(nsIDOMNode *aCurrentNode,
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PRBool aEditableNode,
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nsIDOMNode **aResultNode);
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// and another version that takes a {parent,offset} pair rather than a node
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nsresult GetPriorNode(nsIDOMNode *aParentNode,
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PRInt32 aOffset,
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PRBool aEditableNode,
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nsIDOMNode **aResultNode);
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/** get the node immediately after to aCurrentNode
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* @param aCurrentNode the node from which we start the search
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* @param aEditableNode if PR_TRUE, only return an editable node
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* @param aResultNode [OUT] the node that occurs after aCurrentNode in the tree,
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* skipping non-editable nodes if aEditableNode is PR_TRUE.
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* If there is no prior node, aResultNode will be nsnull.
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*/
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nsresult GetNextNode(nsIDOMNode *aCurrentNode,
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PRBool aEditableNode,
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nsIDOMNode **aResultNode);
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// and another version that takes a {parent,offset} pair rather than a node
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nsresult GetNextNode(nsIDOMNode *aParentNode,
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PRInt32 aOffset,
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PRBool aEditableNode,
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nsIDOMNode **aResultNode);
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/** Get the rightmost child of aCurrentNode, and return it in aResultNode
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* aResultNode is set to nsnull if aCurrentNode has no children.
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*/
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static nsresult GetRightmostChild(nsIDOMNode *aCurrentNode, nsIDOMNode **aResultNode);
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/** Get the leftmost child of aCurrentNode, and return it in aResultNode
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* aResultNode is set to nsnull if aCurrentNode has no children.
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*/
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static nsresult GetLeftmostChild(nsIDOMNode *aCurrentNode, nsIDOMNode **aResultNode);
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/** GetFirstTextNode ADDREFFS and will get the next available text node from the passed
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* in node parameter it can also return NS_ERROR_FAILURE if no text nodes are available
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* now it simply returns the first node in the dom
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* @param nsIDOMNode *aNode is the node to start looking from
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* @param nsIDOMNode **aRetNode is the return location of the text dom node
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*
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* NOTE: this method will probably be removed.
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*/
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static nsresult GetFirstTextNode(nsIDOMNode *aNode, nsIDOMNode **aRetNode);
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/** GetFirstNodeOfType ADDREFFS and will get the next available node from the passed
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* in aStartNode parameter of type aTag.
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* It can also return NS_ERROR_FAILURE if no such nodes are available
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* @param aStartNode is the node to start looking from
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* @param aTag is the type of node we are searching for
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* @param aResult is the node we found, or nsnull if there is none
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*/
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static nsresult GetFirstNodeOfType(nsIDOMNode *aStartNode,
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const nsAReadableString &aTag,
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nsIDOMNode **aResult);
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/** returns PR_TRUE if aNode is of the type implied by aTag */
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static PRBool NodeIsType(nsIDOMNode *aNode, nsIAtom *aTag);
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static PRBool NodeIsType(nsIDOMNode *aNode, const nsAReadableString &aTag);
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/** returns PR_TRUE if aParent can contain a child of type aTag */
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PRBool CanContainTag(nsIDOMNode* aParent, const nsAReadableString &aTag);
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PRBool TagCanContain(const nsAReadableString &aParentTag, nsIDOMNode* aChild);
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virtual PRBool TagCanContainTag(const nsAReadableString &aParentTag, const nsAReadableString &aChildTag);
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/** returns PR_TRUE if aNode is a descendant of our root node */
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PRBool IsDescendantOfBody(nsIDOMNode *inNode);
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/** returns PR_TRUE if aNode is a container */
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PRBool IsContainer(nsIDOMNode *aNode);
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/** returns PR_TRUE if aNode is an editable node */
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PRBool IsEditable(nsIDOMNode *aNode);
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/** returns PR_TRUE if aNode is a MozEditorBogus node */
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PRBool IsMozEditorBogusNode(nsIDOMNode *aNode);
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/** returns PR_TRUE if content is an merely formatting whitespacce */
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PRBool IsEmptyTextContent(nsIContent* aContent);
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/** counts number of editable child nodes */
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nsresult CountEditableChildren(nsIDOMNode *aNode, PRUint32 &outCount);
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/** Find the deep first and last children. Returned nodes are AddReffed */
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nsresult GetFirstEditableNode(nsIDOMNode *aRoot, nsCOMPtr<nsIDOMNode> *outFirstNode);
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nsresult GetLastEditableNode(nsIDOMNode *aRoot, nsCOMPtr<nsIDOMNode> *outLastNode);
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/** from html rules code - migration in progress */
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static nsresult GetTagString(nsIDOMNode *aNode, nsAWritableString& outString);
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static nsCOMPtr<nsIAtom> GetTag(nsIDOMNode *aNode);
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static PRBool NodesSameType(nsIDOMNode *aNode1, nsIDOMNode *aNode2);
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static PRBool IsTextOrElementNode(nsIDOMNode *aNode);
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static PRBool IsTextNode(nsIDOMNode *aNode);
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static PRInt32 GetIndexOf(nsIDOMNode *aParent, nsIDOMNode *aChild);
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static nsCOMPtr<nsIDOMNode> GetChildAt(nsIDOMNode *aParent, PRInt32 aOffset);
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static nsresult GetStartNodeAndOffset(nsISelection *aSelection, nsCOMPtr<nsIDOMNode> *outStartNode, PRInt32 *outStartOffset);
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static nsresult GetEndNodeAndOffset(nsISelection *aSelection, nsCOMPtr<nsIDOMNode> *outEndNode, PRInt32 *outEndOffset);
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// Helpers to add a node to the selection.
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// Used by table cell selection methods
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|
nsresult CreateRange(nsIDOMNode *aStartParent, PRInt32 aStartOffset,
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nsIDOMNode *aEndParent, PRInt32 aEndOffset,
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nsIDOMRange **aRange);
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|
// Gets the node at the StartOffset of StartParent in aRange
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|
// (this is a table cell in cell selection mode)
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|
nsresult GetFirstNodeInRange(nsIDOMRange *aRange, nsIDOMNode **aNode);
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|
// Creates a range with just the supplied node and appends that to the selection
|
|
nsresult AppendNodeToSelectionAsRange(nsIDOMNode *aNode);
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|
// When you are using AppendNodeToSelectionAsRange, call this first to start a new selection
|
|
nsresult ClearSelection();
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|
|
|
nsresult IsPreformatted(nsIDOMNode *aNode, PRBool *aResult);
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|
|
|
nsresult SplitNodeDeep(nsIDOMNode *aNode,
|
|
nsIDOMNode *aSplitPointParent,
|
|
PRInt32 aSplitPointOffset,
|
|
PRInt32 *outOffset,
|
|
PRBool aNoEmptyContainers = PR_FALSE,
|
|
nsCOMPtr<nsIDOMNode> *outLeftNode = 0,
|
|
nsCOMPtr<nsIDOMNode> *outRightNode = 0);
|
|
nsresult JoinNodeDeep(nsIDOMNode *aLeftNode, nsIDOMNode *aRightNode, nsCOMPtr<nsIDOMNode> *aOutJoinNode, PRInt32 *outOffset);
|
|
|
|
nsresult GetString(const nsAReadableString& name, nsAWritableString& value);
|
|
|
|
nsresult BeginUpdateViewBatch(void);
|
|
nsresult EndUpdateViewBatch(void);
|
|
|
|
PRBool GetShouldTxnSetSelection();
|
|
|
|
public:
|
|
// Argh! These transaction names are used by PlaceholderTxn and
|
|
// nsPlaintextEditor. They should be localized to those classes.
|
|
static nsIAtom *gTypingTxnName;
|
|
static nsIAtom *gIMETxnName;
|
|
static nsIAtom *gDeleteTxnName;
|
|
|
|
protected:
|
|
|
|
PRUint32 mFlags; // behavior flags. See nsPlaintextEditor.h for the flags we use.
|
|
|
|
nsWeakPtr mPresShellWeak; // weak reference to the nsIPresShell
|
|
nsWeakPtr mSelConWeak; // weak reference to the nsISelectionController
|
|
nsIViewManager *mViewManager;
|
|
PRInt32 mUpdateCount;
|
|
nsCOMPtr<nsITransactionManager> mTxnMgr;
|
|
nsCOMPtr<nsICSSStyleSheet> mLastStyleSheet; // is owning this dangerous?
|
|
nsWeakPtr mPlaceHolderTxn; // weak reference to placeholder for begin/end batch purposes
|
|
nsIAtom *mPlaceHolderName; // name of placeholder transaction
|
|
PRInt32 mPlaceHolderBatch; // nesting count for batching
|
|
nsSelectionState *mSelState; // saved selection state for placeholder txn batching
|
|
nsSelectionState mSavedSel; // cached selection for nsAutoSelectionReset
|
|
nsRangeUpdater mRangeUpdater; // utility class object for maintaining preserved ranges
|
|
PRBool mShouldTxnSetSelection; // turn off for conservative selection adjustment by txns
|
|
nsCOMPtr<nsIDOMElement> mBodyElement; // cached body node
|
|
PRInt32 mAction; // the current editor action
|
|
EDirection mDirection; // the current direction of editor action
|
|
|
|
// data necessary to build IME transactions
|
|
PRBool mInIMEMode; // are we inside an IME composition?
|
|
nsIPrivateTextRangeList* mIMETextRangeList; // IME special selection ranges
|
|
nsCOMPtr<nsIDOMCharacterData> mIMETextNode; // current IME text node
|
|
PRUint32 mIMETextOffset; // offset in text node where IME comp string begins
|
|
PRUint32 mIMEBufferLength; // current length of IME comp string
|
|
|
|
// various listeners
|
|
nsVoidArray* mActionListeners; // listens to all low level actions on the doc
|
|
nsVoidArray* mEditorObservers; // just notify once per high level change
|
|
nsCOMPtr<nsISupportsArray> mDocStateListeners;// listen to overall doc state (dirty or not, just created, etc)
|
|
|
|
PRInt8 mDocDirtyState; // -1 = not initialized
|
|
nsWeakPtr mDocWeak; // weak reference to the nsIDOMDocument
|
|
nsCOMPtr<nsIDTD> mDTD;
|
|
|
|
static PRInt32 gInstanceCount;
|
|
|
|
friend PRBool NSCanUnload(nsISupports* serviceMgr);
|
|
friend class nsAutoTxnsConserveSelection;
|
|
friend class nsAutoSelectionReset;
|
|
friend class nsAutoRules;
|
|
};
|
|
|
|
|
|
#endif
|