/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* ***** BEGIN LICENSE BLOCK ***** * Version: NPL 1.1/GPL 2.0/LGPL 2.1 * * 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 the Initial Developer are Copyright (C) 1998 * the Initial Developer. All Rights Reserved. * * Contributor(s): * Daniel Glazman * * * Alternatively, the contents of this file may be used under the terms of * either the GNU General Public License Version 2 or later (the "GPL"), or * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), * in which case the provisions of the GPL or the LGPL are applicable instead * of those above. If you wish to allow use of your version of this file only * under the terms of either the GPL or the LGPL, and not to allow others to * use your version of this file under the terms of the NPL, indicate your * decision by deleting the provisions above and replace them with the notice * and other provisions required by the GPL or the LGPL. If you do not delete * the provisions above, a recipient may use your version of this file under * the terms of any one of the NPL, the GPL or the LGPL. * * ***** END LICENSE BLOCK ***** */ #ifndef __editor_h__ #define __editor_h__ #include "nsCOMPtr.h" #include "nsWeakReference.h" #include "nsIEditor.h" #include "nsIEditorIMESupport.h" #include "nsIDOMDocument.h" #include "nsISelection.h" #include "nsIDOMCharacterData.h" #include "nsIPrivateTextRange.h" #include "nsITransactionManager.h" #include "nsIComponentManager.h" #include "nsISupportsArray.h" #include "nsICSSStyleSheet.h" #include "nsIDTD.h" #include "nsIDOMElement.h" #include "nsSelectionState.h" class nsIEditActionListener; class nsIDocumentStateListener; class nsIDOMCharacterData; class nsIDOMRange; class nsIPresShell; class nsIViewManager; class ChangeAttributeTxn; class CreateElementTxn; class InsertElementTxn; class DeleteElementTxn; class InsertTextTxn; class DeleteTextTxn; class SplitElementTxn; class JoinElementTxn; class EditAggregateTxn; class nsVoidArray; class nsISupportsArray; class nsILocale; class IMETextTxn; class AddStyleSheetTxn; class RemoveStyleSheetTxn; class nsIFile; class nsISelectionController; #define kMOZEditorBogusNodeAttr NS_LITERAL_STRING("_moz_editor_bogus_node") #define kMOZEditorBogusNodeValue NS_LITERAL_STRING("TRUE") /** implementation of an editor object. it will be the controller/focal point * for the main editor services. i.e. the GUIManager, publishing, transaction * manager, event interfaces. the idea for the event interfaces is to have them * delegate the actual commands to the editor independent of the XPFE implementation. */ class nsEditor : public nsIEditor, public nsIEditorIMESupport, public nsSupportsWeakReference { public: enum IterDirection { kIterForward, kIterBackward }; enum OperationID { kOpIgnore = -1, kOpNone = 0, kOpUndo, kOpRedo, kOpInsertNode, kOpCreateNode, kOpDeleteNode, kOpSplitNode, kOpJoinNode, kOpDeleteSelection, // text commands kOpInsertBreak = 1000, kOpInsertText = 1001, kOpInsertIMEText = 1002, kOpDeleteText = 1003 }; /** The default constructor. This should suffice. the setting of the interfaces is done * after the construction of the editor class. */ nsEditor(); /** The default destructor. This should suffice. Should this be pure virtual * for someone to derive from the nsEditor later? I dont believe so. */ virtual ~nsEditor(); //Interfaces for addref and release and queryinterface //NOTE: Use NS_DECL_ISUPPORTS_INHERITED in any class inherited from nsEditor NS_DECL_ISUPPORTS /* ------------ utility methods -------------- */ NS_IMETHOD GetPresShell(nsIPresShell **aPS); void NotifyEditorObservers(void); /* ------------ nsIEditor methods -------------- */ NS_DECL_NSIEDITOR /* ------------ nsIEditorIMESupport methods -------------- */ NS_IMETHOD BeginComposition(nsTextEventReply* aReply); NS_IMETHOD QueryComposition(nsTextEventReply* aReply); NS_IMETHOD SetCompositionString(const nsAReadableString& aCompositionString, nsIPrivateTextRangeList* aTextRangeList,nsTextEventReply* aReply); NS_IMETHOD EndComposition(void); NS_IMETHOD ForceCompositionEnd(void); NS_IMETHOD GetReconversionString(nsReconversionEventReply *aReply); public: NS_IMETHOD InsertTextImpl(const nsAReadableString& aStringToInsert, nsCOMPtr *aInOutNode, PRInt32 *aInOutOffset, nsIDOMDocument *aDoc); NS_IMETHOD InsertTextIntoTextNodeImpl(const nsAReadableString& aStringToInsert, nsIDOMCharacterData *aTextNode, PRInt32 aOffset); NS_IMETHOD DeleteSelectionImpl(EDirection aAction); NS_IMETHOD DeleteSelectionAndCreateNode(const nsAReadableString& aTag, nsIDOMNode ** aNewNode); /* helper routines for node/parent manipulations */ nsresult ReplaceContainer(nsIDOMNode *inNode, nsCOMPtr *outNode, const nsAReadableString &aNodeType, const nsAReadableString *aAttribute = nsnull, const nsAReadableString *aValue = nsnull, PRBool aCloneAttributes = PR_FALSE); nsresult RemoveContainer(nsIDOMNode *inNode); nsresult InsertContainerAbove(nsIDOMNode *inNode, nsCOMPtr *outNode, const nsAReadableString &aNodeType, const nsAReadableString *aAttribute = nsnull, const nsAReadableString *aValue = nsnull); nsresult MoveNode(nsIDOMNode *aNode, nsIDOMNode *aParent, PRInt32 aOffset); /* Method to replace certain CreateElementNS() calls. Arguments: nsString& aTag - tag you want nsIContent** aContent - returned Content that was created with above namespace. */ nsresult CreateHTMLContent(const nsAReadableString& aTag, nsIContent** aContent); protected: /* NS_IMETHOD SetProperties(nsVoidArray *aPropList); NS_IMETHOD GetProperties(nsVoidArray *aPropList); */ /** create a transaction for setting aAttribute to aValue on aElement */ NS_IMETHOD CreateTxnForSetAttribute(nsIDOMElement *aElement, const nsAReadableString & aAttribute, const nsAReadableString & aValue, ChangeAttributeTxn ** aTxn); /** create a transaction for removing aAttribute on aElement */ NS_IMETHOD CreateTxnForRemoveAttribute(nsIDOMElement *aElement, const nsAReadableString & aAttribute, ChangeAttributeTxn ** aTxn); /** create a transaction for creating a new child node of aParent of type aTag. */ NS_IMETHOD CreateTxnForCreateElement(const nsAReadableString & aTag, nsIDOMNode *aParent, PRInt32 aPosition, CreateElementTxn ** aTxn); /** create a transaction for inserting aNode as a child of aParent. */ NS_IMETHOD CreateTxnForInsertElement(nsIDOMNode * aNode, nsIDOMNode * aParent, PRInt32 aOffset, InsertElementTxn ** aTxn); /** create a transaction for removing aElement from its parent. */ NS_IMETHOD CreateTxnForDeleteElement(nsIDOMNode * aElement, DeleteElementTxn ** aTxn); NS_IMETHOD CreateTxnForDeleteSelection(EDirection aAction, EditAggregateTxn ** aTxn); NS_IMETHOD CreateTxnForDeleteInsertionPoint(nsIDOMRange *aRange, EDirection aAction, EditAggregateTxn *aTxn); /** create a transaction for inserting aStringToInsert into aTextNode * if aTextNode is null, the string is inserted at the current selection. */ NS_IMETHOD CreateTxnForInsertText(const nsAReadableString & aStringToInsert, nsIDOMCharacterData *aTextNode, PRInt32 aOffset, InsertTextTxn ** aTxn); NS_IMETHOD CreateTxnForIMEText(const nsAReadableString & aStringToInsert, IMETextTxn ** aTxn); /** create a transaction for adding a style sheet */ NS_IMETHOD CreateTxnForAddStyleSheet(nsICSSStyleSheet* aSheet, AddStyleSheetTxn* *aTxn); /** create a transaction for removing a style sheet */ NS_IMETHOD CreateTxnForRemoveStyleSheet(nsICSSStyleSheet* aSheet, RemoveStyleSheetTxn* *aTxn); NS_IMETHOD DeleteText(nsIDOMCharacterData *aElement, PRUint32 aOffset, PRUint32 aLength); // NS_IMETHOD DeleteRange(nsIDOMRange *aRange); NS_IMETHOD CreateTxnForDeleteText(nsIDOMCharacterData *aElement, PRUint32 aOffset, PRUint32 aLength, DeleteTextTxn **aTxn); NS_IMETHOD CreateTxnForSplitNode(nsIDOMNode *aNode, PRUint32 aOffset, SplitElementTxn **aTxn); NS_IMETHOD CreateTxnForJoinNode(nsIDOMNode *aLeftNode, nsIDOMNode *aRightNode, JoinElementTxn **aTxn); NS_IMETHOD DeleteSelectionAndPrepareToCreateNode(nsCOMPtr &parentSelectedNode, PRInt32& offsetOfNewNode); // called after a transaction is done successfully NS_IMETHOD DoAfterDoTransaction(nsITransaction *aTxn); // called after a transaction is undone successfully NS_IMETHOD DoAfterUndoTransaction(); // called after a transaction is redone successfully NS_IMETHOD DoAfterRedoTransaction(); typedef enum { eDocumentCreated, eDocumentToBeDestroyed, eDocumentStateChanged } TDocumentListenerNotification; // tell the doc state listeners that the doc state has changed NS_IMETHOD NotifyDocumentListeners(TDocumentListenerNotification aNotificationType); /** make the given selection span the entire document */ NS_IMETHOD SelectEntireDocument(nsISelection *aSelection); /* Helper for output routines -- we expect subclasses to override this */ NS_IMETHOD GetWrapWidth(PRInt32* aWrapCol); // XXXX: Horrible hack! We are doing this because // of an error in Gecko which is not rendering the // document after a change via the DOM - gpk 2/13/99 void HACKForceRedraw(void); NS_IMETHOD ScrollIntoView(PRBool aScrollToBegin); // stub. see comment in source. virtual PRBool IsBlockNode(nsIDOMNode *aNode); // helper for GetPriorNode nsresult GetPriorNodeImpl(nsIDOMNode *aCurrentNode, PRBool aEditableNode, nsCOMPtr *aResultNode, PRBool bNoBlockCrossing = PR_FALSE); // helper for GetNextNode nsresult GetNextNodeImpl(nsIDOMNode *aCurrentNode, PRBool aEditableNode, nsCOMPtr *aResultNode, PRBool bNoBlockCrossing = PR_FALSE); public: /** 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(); /** routines for managing the preservation of selection across * various editor actions */ PRBool ArePreservingSelection(); nsresult PreserveSelectionAcrossActions(nsISelection *aSel); nsresult RestorePreservedSelection(nsISelection *aSel); void StopPreservingSelection(); /** return the string that represents text nodes in the content tree */ static nsresult GetTextNodeTag(nsAWritableString& aOutString); /** * SplitNode() creates a new node identical to an existing node, and split the contents between the two nodes * @param aExistingRightNode the node to split. It will become the new node's next sibling. * @param aOffset the offset of aExistingRightNode's content|children to do the split at * @param aNewLeftNode [OUT] the new node resulting from the split, becomes aExistingRightNode's previous sibling. * @param aParent the parent of aExistingRightNode */ nsresult SplitNodeImpl(nsIDOMNode *aExistingRightNode, PRInt32 aOffset, nsIDOMNode *aNewLeftNode, nsIDOMNode *aParent); /** * JoinNodes() takes 2 nodes and merge their content|children. * @param aNodeToKeep The node that will remain after the join. * @param aNodeToJoin The node that will be joined with aNodeToKeep. * There is no requirement that the two nodes be of the same type. * @param aParent The parent of aNodeToKeep * @param aNodeToKeepIsFirst if PR_TRUE, the contents|children of aNodeToKeep come before the * contents|children of aNodeToJoin, otherwise their positions are switched. */ nsresult JoinNodesImpl(nsIDOMNode *aNodeToKeep, nsIDOMNode *aNodeToJoin, nsIDOMNode *aParent, PRBool aNodeToKeepIsFirst); /** * Set aOffset to the offset of aChild in aParent. * Returns an error if aChild is not an immediate child of aParent. */ static nsresult GetChildOffset(nsIDOMNode *aChild, nsIDOMNode *aParent, PRInt32 &aOffset); /** * Set aParent to the parent of aChild. * Set aOffset to the offset of aChild in aParent. */ static nsresult GetNodeLocation(nsIDOMNode *aChild, nsCOMPtr *aParent, PRInt32 *aOffset); /** returns the number of things inside aNode in the out-param aCount. * @param aNode is the node to get the length of. * If aNode is text, returns number of characters. * If not, returns number of children nodes. * @param aCount [OUT] the result of the above calculation. */ static nsresult GetLengthOfDOMNode(nsIDOMNode *aNode, PRUint32 &aCount); /** get the node immediately prior to aCurrentNode * @param aCurrentNode the node from which we start the search * @param aEditableNode if PR_TRUE, only return an editable node * @param aResultNode [OUT] the node that occurs before aCurrentNode in the tree, * skipping non-editable nodes if aEditableNode is PR_TRUE. * If there is no prior node, aResultNode will be nsnull. */ nsresult GetPriorNode(nsIDOMNode *aCurrentNode, PRBool aEditableNode, nsCOMPtr *aResultNode, PRBool bNoBlockCrossing = PR_FALSE); // and another version that takes a {parent,offset} pair rather than a node nsresult GetPriorNode(nsIDOMNode *aParentNode, PRInt32 aOffset, PRBool aEditableNode, nsCOMPtr *aResultNode, PRBool bNoBlockCrossing = PR_FALSE); /** get the node immediately after to aCurrentNode * @param aCurrentNode the node from which we start the search * @param aEditableNode if PR_TRUE, only return an editable node * @param aResultNode [OUT] the node that occurs after aCurrentNode in the tree, * skipping non-editable nodes if aEditableNode is PR_TRUE. * If there is no prior node, aResultNode will be nsnull. */ nsresult GetNextNode(nsIDOMNode *aCurrentNode, PRBool aEditableNode, nsCOMPtr *aResultNode, PRBool bNoBlockCrossing = PR_FALSE); // and another version that takes a {parent,offset} pair rather than a node nsresult GetNextNode(nsIDOMNode *aParentNode, PRInt32 aOffset, PRBool aEditableNode, nsCOMPtr *aResultNode, PRBool bNoBlockCrossing = PR_FALSE); /** Get the rightmost child of aCurrentNode; * return nsnull if aCurrentNode has no children. */ nsCOMPtr GetRightmostChild(nsIDOMNode *aCurrentNode, PRBool bNoBlockCrossing = PR_FALSE); /** Get the leftmost child of aCurrentNode; * return nsnull if aCurrentNode has no children. */ nsCOMPtr GetLeftmostChild(nsIDOMNode *aCurrentNode, PRBool bNoBlockCrossing = PR_FALSE); /** returns PR_TRUE if aNode is of the type implied by aTag */ static PRBool NodeIsType(nsIDOMNode *aNode, nsIAtom *aTag); static PRBool NodeIsType(nsIDOMNode *aNode, const nsAReadableString &aTag); /** returns PR_TRUE if aParent can contain a child of type aTag */ PRBool CanContainTag(nsIDOMNode* aParent, const nsAReadableString &aTag); PRBool TagCanContain(const nsAReadableString &aParentTag, nsIDOMNode* aChild); virtual PRBool TagCanContainTag(const nsAReadableString &aParentTag, const nsAReadableString &aChildTag); /** returns PR_TRUE if aNode is our root node */ PRBool IsRootNode(nsIDOMNode *inNode); /** returns PR_TRUE if aNode is a descendant of our root node */ PRBool IsDescendantOfBody(nsIDOMNode *inNode); /** returns PR_TRUE if aNode is a container */ PRBool IsContainer(nsIDOMNode *aNode); /** returns PR_TRUE if aNode is an editable node */ PRBool IsEditable(nsIDOMNode *aNode); /** returns PR_TRUE if aNode is a MozEditorBogus node */ PRBool IsMozEditorBogusNode(nsIDOMNode *aNode); /** returns PR_TRUE if content is an merely formatting whitespacce */ PRBool IsEmptyTextContent(nsIContent* aContent); /** counts number of editable child nodes */ nsresult CountEditableChildren(nsIDOMNode *aNode, PRUint32 &outCount); /** Find the deep first and last children. Returned nodes are AddReffed */ nsresult GetFirstEditableNode(nsIDOMNode *aRoot, nsCOMPtr *outFirstNode); #ifdef XXX_DEAD_CODE nsresult GetLastEditableNode(nsIDOMNode *aRoot, nsCOMPtr *outLastNode); #endif /** from html rules code - migration in progress */ static nsresult GetTagString(nsIDOMNode *aNode, nsAWritableString& outString); static nsCOMPtr GetTag(nsIDOMNode *aNode); virtual PRBool NodesSameType(nsIDOMNode *aNode1, nsIDOMNode *aNode2); static PRBool IsTextOrElementNode(nsIDOMNode *aNode); static PRBool IsTextNode(nsIDOMNode *aNode); static PRInt32 GetIndexOf(nsIDOMNode *aParent, nsIDOMNode *aChild); static nsCOMPtr GetChildAt(nsIDOMNode *aParent, PRInt32 aOffset); static nsresult GetStartNodeAndOffset(nsISelection *aSelection, nsCOMPtr *outStartNode, PRInt32 *outStartOffset); static nsresult GetEndNodeAndOffset(nsISelection *aSelection, nsCOMPtr *outEndNode, PRInt32 *outEndOffset); // Helpers to add a node to the selection. // Used by table cell selection methods nsresult CreateRange(nsIDOMNode *aStartParent, PRInt32 aStartOffset, nsIDOMNode *aEndParent, PRInt32 aEndOffset, nsIDOMRange **aRange); // Creates a range with just the supplied node and appends that to the selection nsresult AppendNodeToSelectionAsRange(nsIDOMNode *aNode); // When you are using AppendNodeToSelectionAsRange, call this first to start a new selection nsresult ClearSelection(); nsresult IsPreformatted(nsIDOMNode *aNode, PRBool *aResult); nsresult SplitNodeDeep(nsIDOMNode *aNode, nsIDOMNode *aSplitPointParent, PRInt32 aSplitPointOffset, PRInt32 *outOffset, PRBool aNoEmptyContainers = PR_FALSE, nsCOMPtr *outLeftNode = 0, nsCOMPtr *outRightNode = 0); nsresult JoinNodeDeep(nsIDOMNode *aLeftNode, nsIDOMNode *aRightNode, nsCOMPtr *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 mModCount; // number of modifications (for undo/redo stack) 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 mTxnMgr; nsCOMPtr 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 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 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 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 mDTD; static PRInt32 gInstanceCount; friend PRBool NSCanUnload(nsISupports* serviceMgr); friend class nsAutoTxnsConserveSelection; friend class nsAutoSelectionReset; friend class nsAutoRules; }; #endif