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491 lines
18 KiB
Plaintext
491 lines
18 KiB
Plaintext
/* -*- Mode: IDL; tab-width: 4; 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 Mozilla 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/MPL/
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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 the Mozilla browser.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications, Inc. Portions created by Netscape are
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* Copyright (C) 1999, Mozilla. All Rights Reserved.
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*
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* Contributor(s):
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* Daniel Glazman <glazman@netscape.com>
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*/
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#include "nsISupports.idl"
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#include "domstubs.idl"
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interface nsIURI;
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interface nsIAtom;
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interface nsISelection;
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interface nsISelectionController;
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interface nsIDocumentStateListener;
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interface nsIOutputStream;
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interface nsITransactionManager;
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interface nsITransaction;
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interface nsIEditorObserver;
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interface nsIEditActionListener;
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%{C++
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#include "nsAWritableString.h"
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//class nsIDOMDocument;
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//class nsIDOMElement;
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//class nsIDOMNode;
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class nsIPresShell;
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class nsIContent;
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typedef short EDirection;
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%}
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[ptr] native nsIPresShellPtr(nsIPresShell);
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[ptr] native nsIContentPtr(nsIContent);
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[scriptable, uuid(06b979ce-1dd2-11b2-b6c7-a8bc47aa06b6)]
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interface nsIEditor : nsISupports
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{
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%{C++
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typedef short EDirection;
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%}
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const short eNone = 0;
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const short eNext = 1;
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const short ePrevious = 2;
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const short eNextWord = 3;
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const short ePreviousWord = 4;
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const short eToBeginningOfLine = 5;
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const short eToEndOfLine = 6;
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/**
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* Init is to tell the implementation of nsIEditor to begin its services
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* @param aDoc The dom document interface being observed
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* @param aPresShell TEMP: The presentation shell displaying the document
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* once events can tell us from what pres shell they originated,
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* this will no longer be necessary and the editor will no longer be
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* linked to a single pres shell.
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* @param aRoot This is the root of the editable section of this document. if it is null then we get root from document body.
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* @param aSelCon this should be used to get the selection location
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* @param aFlags A bitmask of flags for specifying the behavior of the editor.
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*/
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[noscript] void Init(in nsIDOMDocument doc, in nsIPresShellPtr shell, in nsIContentPtr aRoot, in nsISelectionController aSelCon, in unsigned long aFlags);
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void SetAttributeOrEquivalent(in nsIDOMElement element, in DOMString sourceAttrName, in DOMString sourceAttrValue);
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/**
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* PostCreate should be called after Init, and is the time that the editor tells
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* its documentStateObservers that the document has been created.
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*/
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void PostCreate();
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/**
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* PreDestroy is called before the editor goes away, and gives the editor a chance
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* to tell its documentStateObservers that the document is going away.
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*/
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void PreDestroy();
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/** return the edit flags for this editor */
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void GetFlags(out unsigned long flags);
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/** set the edit flags for this editor. May be called at any time. */
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void SetFlags(in unsigned long aFlags);
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/**
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* return the DOM Document this editor is associated with
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*
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* @param aDoc [OUT] the dom interface being observed, refcounted
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*/
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void GetDocument(out nsIDOMDocument doc);
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/** return the body element
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* @param aElement return value for the root of the editable document
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*/
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void GetRootElement(out nsIDOMElement element);
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/**
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* return the presentation shell this editor is associated with
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*
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* @param aPS [OUT] the pres shell, refcounted
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*/
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//NS_IMETHOD GetPresShell(nsIPresShell **aPS);
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/**
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* return the selection controller for the current presentation
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*
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* @param aSelCon [OUT] the selection controller, refcounted
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*/
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void GetSelectionController(out nsISelectionController selectioncontroller);
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/**
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* return the DOM Selection for the presentation shell that has focus
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* (or most recently had focus.)
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* @param aSelection [OUT] the dom interface for the selection
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*/
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void GetSelection(out nsISelection selection);
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/* ------------ Selected content removal -------------- */
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/**
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* DeleteSelection removes all nodes in the current selection.
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* @param aDir if eLTR, delete to the right (for example, the DEL key)
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* if eRTL, delete to the left (for example, the BACKSPACE key)
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*/
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void DeleteSelection(in short action);
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/* ------------ Document info and file methods -------------- */
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/** Returns true if the document has no *meaningful* content */
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void GetDocumentIsEmpty(out boolean documentIsEmpty);
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/** Returns true if the document is modifed and needs saving */
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void GetDocumentModified(out boolean outDocModified);
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/** Returns the current 'Save' document character set */
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void GetDocumentCharacterSet(out DOMString characterSet);
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/** Sets the current 'Save' document character set */
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void SetDocumentCharacterSet(in DOMString characterSet);
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/** to be used ONLY when we need to override the doc's modification state (such as when it's saved)
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*/
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void ResetModificationCount();
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/** Gets the modification count of the document we are editing. Zero means unchanged.
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* @return the modification count of the document being edited. Zero means unchanged.
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*/
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long GetModificationCount();
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/** called each time we modify the document. Increments the modification count of the document.
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* @param aModCount the number of modifications to increase or decrease count by
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*/
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void IncrementModificationCount(in long aModCount);
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/* ------------ Transaction methods -------------- */
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/** GetTransactionManagerDo() Get the transaction manager
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*
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* @return aTxnManager the transaction manager that the editor is using
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*/
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void GetTransactionManager(out nsITransactionManager txnManager);
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/** Do() fires a transaction. It is provided here so clients can create their own transactions.
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* If a transaction manager is present, it is used.
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* Otherwise, the transaction is just executed directly.
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*
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* @param aTxn the transaction to execute
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*/
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void Do(in nsITransaction txn);
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/** turn the undo system on or off
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* @param aEnable if PR_TRUE, the undo system is turned on if it is available
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* if PR_FALSE the undo system is turned off if it was previously on
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* @return if aEnable is PR_TRUE, returns NS_OK if the undo system could be initialized properly
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* if aEnable is PR_FALSE, returns NS_OK.
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*/
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void EnableUndo(in boolean enable);
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/** Undo reverses the effects of the last Do operation, if Undo is enabled in the editor.
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* It is provided here so clients need no knowledge of whether the editor has a transaction manager or not.
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* If a transaction manager is present, it is told to undo and the result of
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* that undo is returned.
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* Otherwise, the Undo request is ignored and an error NS_ERROR_NOT_AVAILABLE is returned.
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*
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*/
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void Undo(in unsigned long count);
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/** returns state information about the undo system.
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* @param aIsEnabled [OUT] PR_TRUE if undo is enabled
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* @param aCanUndo [OUT] PR_TRUE if at least one transaction is currently ready to be undone.
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*/
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void CanUndo(out boolean isEnabled, out boolean canUndo);
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/** Redo reverses the effects of the last Undo operation
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* It is provided here so clients need no knowledge of whether the editor has a transaction manager or not.
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* If a transaction manager is present, it is told to redo and the result of the previously undone
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* transaction is reapplied to the document.
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* If no transaction is available for Redo, or if the document has no transaction manager,
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* the Redo request is ignored and an error NS_ERROR_NOT_AVAILABLE is returned.
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*
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*/
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void Redo(in unsigned long count);
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/** returns state information about the redo system.
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* @param aIsEnabled [OUT] PR_TRUE if redo is enabled
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* @param aCanRedo [OUT] PR_TRUE if at least one transaction is currently ready to be redone.
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*/
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void CanRedo(out boolean isEnabled, out boolean canRedo);
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/** BeginTransaction is a signal from the caller to the editor that the caller will execute multiple updates
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* to the content tree that should be treated as a single logical operation,
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* in the most efficient way possible.<br>
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* All transactions executed between a call to BeginTransaction and EndTransaction will be undoable as
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* an atomic action.<br>
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* EndTransaction must be called after BeginTransaction.<br>
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* Calls to BeginTransaction can be nested, as long as EndTransaction is called once per BeginUpdate.
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*/
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void BeginTransaction();
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/** EndTransaction is a signal to the editor that the caller is finished updating the content model.<br>
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* BeginUpdate must be called before EndTransaction is called.<br>
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* Calls to BeginTransaction can be nested, as long as EndTransaction is called once per BeginTransaction.
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*/
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void EndTransaction();
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void BeginPlaceHolderTransaction(in nsIAtom name);
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void EndPlaceHolderTransaction();
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void ShouldTxnSetSelection(out boolean result);
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/** Set the flag that prevents InsertElementTxn from changing the selection
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* @param should Set false to suppress changing the selection;
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* i.e., before using InsertElement() to insert under <head> element
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* WARNING: You must be very careful to reset back to PR_TRUE after
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* setting PR_FALSE, else selection/caret is trashed
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* for further editing
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*/
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void SetShouldTxnSetSelection(in boolean should);
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/* ------------ Clipboard methods -------------- */
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/** cut the currently selected text, putting it into the OS clipboard
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* What if no text is selected?
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* What about mixed selections?
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* What are the clipboard formats?
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*/
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void Cut();
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/** Can we cut? True if the doc is modifiable, and we have a non-
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* collapsed selection.
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*/
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void CanCut(out boolean canCut);
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/** copy the currently selected text, putting it into the OS clipboard
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* What if no text is selected?
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* What about mixed selections?
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* What are the clipboard formats?
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*/
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void Copy();
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/** Can we copy? True if we have a non-collapsed selection.
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*/
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void CanCopy(out boolean aCanCopy);
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/** paste the text in the OS clipboard at the cursor position, replacing
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* the selected text (if any)
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*/
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void Paste(in long aSelectionType);
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/** Can we paste? True if the doc is modifiable, and we have
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* pasteable data in the clipboard.
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*/
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void CanPaste(in long aSelectionType, out boolean aCanPaste);
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/* ------------ Selection methods -------------- */
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/** sets the document selection to the entire contents of the document */
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void SelectAll();
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/** sets the document selection to the beginning of the document */
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void BeginningOfDocument();
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/** sets the document selection to the end of the document */
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void EndOfDocument();
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/** Can we paste? True if the doc is modifiable, and we have
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* pasteable data in the clipboard.
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*/
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/* ------------ Drag/Drop methods -------------- */
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/**
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* CanDrag decides if a drag should be started
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* (for example, based on the current selection and mousepoint).
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*/
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void CanDrag(in nsIDOMEvent aEvent, out boolean aCanDrag);
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/**
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* DoDrag transfers the relevant data (as appropriate)
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* to a transferable so it can later be dropped.
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*/
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void DoDrag(in nsIDOMEvent aEvent);
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/**
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* InsertFromDrop looks for a dragsession and inserts the
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* relevant data in response to a drop.
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*/
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void InsertFromDrop(in nsIDOMEvent aEvent);
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/* ------------ Node manipulation methods -------------- */
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/**
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* SetAttribute() sets the attribute of aElement.
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* No checking is done to see if aAttribute is a legal attribute of the node,
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* or if aValue is a legal value of aAttribute.
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*
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* @param aElement the content element to operate on
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* @param aAttribute the string representation of the attribute to set
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* @param aValue the value to set aAttribute to
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*/
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void SetAttribute(in nsIDOMElement aElement, in DOMString attributestr, in DOMString attvalue);
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/**
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* GetAttributeValue() retrieves the attribute's value for aElement.
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*
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* @param aElement the content element to operate on
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* @param aAttribute the string representation of the attribute to get
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* @param aResultValue the value of aAttribute. only valid if aResultIsSet is PR_TRUE
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* @param aResultIsSet PR_TRUE if aAttribute is set on the current node, PR_FALSE if it is not.
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*/
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void GetAttributeValue(in nsIDOMElement aElement,
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in DOMString attributestr,
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out DOMString resultValue,
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out boolean resultIsSet);
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/**
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* RemoveAttribute() deletes aAttribute from the attribute list of aElement.
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* If aAttribute is not an attribute of aElement, nothing is done.
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*
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* @param aElement the content element to operate on
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* @param aAttribute the string representation of the attribute to get
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*/
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void RemoveAttribute(in nsIDOMElement aElement,
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in DOMString aAttribute);
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/**
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* CloneAttributes() is similar to nsIDOMNode::cloneNode(),
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* it assures the attribute nodes of the destination are identical with the source node
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* by copying all existing attributes from the source and deleting those not in the source.
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* This is used when the destination node (element) already exists
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*
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* The supplied nodes MUST BE ELEMENTS (most callers are working with nodes)
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* @param aDestNode the destination element to operate on
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* @param aSourceNode the source element to copy attributes from
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*/
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void CloneAttributes(in nsIDOMNode destNode, in nsIDOMNode sourceNode);
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/**
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* CreateNode instantiates a new element of type aTag and inserts it into aParent at aPosition.
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* @param aTag The type of object to create
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* @param aParent The node to insert the new object into
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* @param aPosition The place in aParent to insert the new node
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* @param aNewNode [OUT] The node created. Caller must release aNewNode.
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*/
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void CreateNode(in DOMString tag,
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in nsIDOMNode parent,
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in long position,
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out nsIDOMNode newNode);
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/**
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* InsertNode inserts aNode into aParent at aPosition.
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* No checking is done to verify the legality of the insertion. That is the
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* responsibility of the caller.
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* @param aNode The DOM Node to insert.
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* @param aParent The node to insert the new object into
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* @param aPosition The place in aParent to insert the new node
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* 0=first child, 1=second child, etc.
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* any number > number of current children = last child
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*/
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void InsertNode(in nsIDOMNode vode,
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in nsIDOMNode parent,
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in long aPosition);
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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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*/
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void SplitNode(in nsIDOMNode existingRightNode,
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in long offset,
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out nsIDOMNode newLeftNode);
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/**
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* JoinNodes() takes 2 nodes and merge their content|children.
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* @param aLeftNode The left node. It will be deleted.
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* @param aRightNode The right node. It will remain after the join.
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* @param aParent The parent of aExistingRightNode
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*
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* There is no requirement that the two nodes be of the same type.
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* However, a text node can be merged only with another text node.
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*/
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void JoinNodes(in nsIDOMNode leftNode,
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in nsIDOMNode rightNode,
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in nsIDOMNode parent);
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/**
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* DeleteNode removes aChild from aParent.
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* @param aChild The node to delete
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*/
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void DeleteNode(in nsIDOMNode child);
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/**
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* InsertFormattingForNode() sets a special dirty attribute on the node.
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* Usually this will be called immediately after creating a new node.
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* @param aNode The node for which to insert formatting.
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*/
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void MarkNodeDirty(in nsIDOMNode node);
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/* ------------ Output methods -------------- */
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/**
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* Output methods:
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* aFormatType is a mime type, like text/plain.
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*/
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void OutputToString(out DOMString outputString,
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[const]in DOMString formatType,
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in unsigned long flags);
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void OutputToStream(in nsIOutputStream aStream,
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[const] in DOMString formatType,
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[const] in DOMString charsetOverride,
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in unsigned long flags);
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/* ------------ Various listeners methods -------------- */
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/** add an EditorObserver to the editors list of observers. */
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void AddEditorObserver(in nsIEditorObserver observer);
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/** Remove an EditorObserver from the editor's list of observers. */
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void RemoveEditorObserver(in nsIEditorObserver observer);
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/** add an EditActionListener to the editors list of listeners. */
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void AddEditActionListener(in nsIEditActionListener listener);
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/** Remove an EditActionListener from the editor's list of listeners. */
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void RemoveEditActionListener(in nsIEditActionListener listener);
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/** Add a DocumentStateListener to the editors list of doc state listeners. */
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void AddDocumentStateListener(in nsIDocumentStateListener listener);
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/** Remove a DocumentStateListener to the editors list of doc state listeners. */
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void RemoveDocumentStateListener(in nsIDocumentStateListener listener);
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/* ------------ Debug methods -------------- */
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/**
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* And a debug method -- show us what the tree looks like right now
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*/
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void DumpContentTree();
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/** Dumps a text representation of the content tree to standard out */
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void DebugDumpContent() ;
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/* Run unit tests. Noop in optimized builds */
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void DebugUnitTests(out long outNumTests, out long outNumTestsFailed);
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};
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