gecko-dev/editor/base/nsInterfaceState.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*/
#ifndef nsInterfaceState_h__
#define nsInterfaceState_h__
#include "nsIDOMSelectionListener.h"
#include "nsIDocumentStateListener.h"
#include "nsITransactionListener.h"
#include "nsIWebShell.h"
#include "nsITimer.h"
#include "nsITimerCallback.h"
class nsIHTMLEditor;
class nsIDOMXULDocument;
// class responsible for communicating changes in local state back to the UI.
// This is currently somewhat tied to a given XUL UI implementation
class nsInterfaceState : public nsIDOMSelectionListener,
public nsIDocumentStateListener,
public nsITransactionListener,
public nsITimerCallback
{
public:
nsInterfaceState();
virtual ~nsInterfaceState();
NS_DECL_ISUPPORTS
NS_IMETHOD Init(nsIHTMLEditor* aEditor, nsIDOMXULDocument *aChromeDoc);
// force an update of the UI. At some point, we could pass flags
// here to target certain things for updating.
NS_IMETHOD ForceUpdate(const PRUnichar *tagToUpdate);
// nsIDOMSelectionListener interface
NS_IMETHOD NotifySelectionChanged(nsIDOMDocument *aDoc, nsIDOMSelection *aSel, short aReason);
NS_DECL_NSIDOCUMENTSTATELISTENER
// nsITimerCallback interfaces
NS_IMETHOD_(void) Notify(nsITimer *timer);
/** nsITransactionListener interfaces
*/
NS_IMETHOD WillDo(nsITransactionManager *aManager, nsITransaction *aTransaction, PRBool *aInterrupt);
NS_IMETHOD DidDo(nsITransactionManager *aManager, nsITransaction *aTransaction, nsresult aDoResult);
NS_IMETHOD WillUndo(nsITransactionManager *aManager, nsITransaction *aTransaction, PRBool *aInterrupt);
NS_IMETHOD DidUndo(nsITransactionManager *aManager, nsITransaction *aTransaction, nsresult aUndoResult);
NS_IMETHOD WillRedo(nsITransactionManager *aManager, nsITransaction *aTransaction, PRBool *aInterrupt);
NS_IMETHOD DidRedo(nsITransactionManager *aManager, nsITransaction *aTransaction, nsresult aRedoResult);
NS_IMETHOD WillBeginBatch(nsITransactionManager *aManager, PRBool *aInterrupt);
NS_IMETHOD DidBeginBatch(nsITransactionManager *aManager, nsresult aResult);
NS_IMETHOD WillEndBatch(nsITransactionManager *aManager, PRBool *aInterrupt);
NS_IMETHOD DidEndBatch(nsITransactionManager *aManager, nsresult aResult);
NS_IMETHOD WillMerge(nsITransactionManager *aManager, nsITransaction *aTopTransaction,
nsITransaction *aTransactionToMerge, PRBool *aInterrupt);
NS_IMETHOD DidMerge(nsITransactionManager *aManager, nsITransaction *aTopTransaction,
nsITransaction *aTransactionToMerge,
PRBool aDidMerge, nsresult aMergeResult);
protected:
enum {
eStateUninitialized = -1,
eStateOff = PR_FALSE,
eStateOn = PR_TRUE
};
PRBool SelectionIsCollapsed();
PRBool XULNodeExists(const char* nodeID);
nsresult SetNodeAttribute(const char* nodeID, const char* attributeName, const nsString& newValue);
nsresult UnsetNodeAttribute(const char* nodeID, const char* attributeName);
nsresult UpdateParagraphState(const char* observerName, const char* attributeName);
nsresult UpdateListState(const char* observerName);
nsresult UpdateTextState(const char* tagName, const char* observerName, const char* attributeName, PRInt8& ioState);
nsresult UpdateFontFace(const char* observerName, const char* attributeName);
nsresult UpdateDirtyState(PRBool aNowDirty);
nsresult CallUpdateCommands(const nsString& aCommand);
nsresult PrimeUpdateTimer();
void TimerCallback();
// this class should not hold references to the editor or editorShell. Doing
// so would result in cirular reference chains.
nsIHTMLEditor* mEditor; // the HTML editor
nsIDOMXULDocument* mChromeDoc; // XUL document for the chrome area
nsIDOMWindow* mDOMWindow; // nsIDOMWindow used for calling UpdateCommands
nsCOMPtr<nsITimer> mUpdateTimer;
// what we need to update
PRPackedBool mUpdateParagraph;
PRPackedBool mUpdateFont;
PRPackedBool mUpdateList;
PRPackedBool mUpdateBold;
PRPackedBool mUpdateItalics;
PRPackedBool mUpdateUnderline;
// current state
PRInt8 mBoldState;
PRInt8 mItalicState;
PRInt8 mUnderlineState;
PRInt8 mDirtyState;
PRInt8 mSelectionCollapsed;
PRPackedBool mFirstDoOfFirstUndo;
nsString mParagraphFormat;
nsString mFontString;
nsString mListTag; // contains "" for none, "ol" or "ul"
};
extern "C" nsresult NS_NewInterfaceState(nsIHTMLEditor* aEditor, nsIDOMXULDocument* aChromeDoc, nsIDOMSelectionListener** aInstancePtrResult);
#endif // nsInterfaceState_h__