/* -*- 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 1.0 (the "NPL"); you may not use this file except in
 * compliance with the NPL.  You may obtain a copy of the NPL at
 * http://www.mozilla.org/NPL/
 *
 * Software distributed under the NPL is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
 * for the specific language governing rights and limitations under the
 * NPL.
 *
 * The Initial Developer of this code under the NPL is Netscape
 * Communications Corporation.  Portions created by Netscape are
 * Copyright (C) 1998 Netscape Communications Corporation.  All Rights
 * Reserved.
 */

#ifndef nsHTMLEditor_h__
#define nsHTMLEditor_h__

#include "nsITextEditor.h"
#include "nsTextEditor.h"
#include "nsIHTMLEditor.h"
#include "nsCOMPtr.h"
#include "nsIDOMEventListener.h"
#include "nsITableLayout.h"

/**
 * The HTML editor implementation.<br>
 * Use to edit HTML document represented as a DOM tree. 
 */
class nsHTMLEditor  : public nsTextEditor, public nsIHTMLEditor
{

  typedef enum {eNoOp=0, eReplaceParent=1, eInsertParent=2} BlockTransformationType;

public:
  // see nsIHTMLEditor for documentation

//Interfaces for addref and release and queryinterface
//NOTE macro used is for classes that inherit from 
// another class. Only the base class should use NS_DECL_ISUPPORTS
  NS_DECL_ISUPPORTS_INHERITED

  nsHTMLEditor();
  virtual ~nsHTMLEditor();

//Initialization
  NS_IMETHOD Init(nsIDOMDocument *aDoc, nsIPresShell *aPresShell);

//============================================================================
// Methods that are duplicates of nsTextEditor -- exposed here for convenience

// Editing Operations
  NS_IMETHOD SetTextProperty(nsIAtom *aProperty, 
                             const nsString *aAttribute,
                             const nsString *aValue);
  NS_IMETHOD GetTextProperty(nsIAtom *aProperty, 
                             const nsString *aAttribute, const nsString *aValue,
                             PRBool &aFirst, PRBool &aAny, PRBool &aAll);
  NS_IMETHOD RemoveTextProperty(nsIAtom *aProperty, const nsString *aAttribute);
  NS_IMETHOD DeleteSelection(nsIEditor::ECollapsedSelectionAction aAction);
  NS_IMETHOD InsertText(const nsString& aStringToInsert);
  NS_IMETHOD InsertBreak();
  NS_IMETHOD CopyAttributes(nsIDOMNode *aDestNode, nsIDOMNode *aSourceNode);

// Transaction control
  NS_IMETHOD EnableUndo(PRBool aEnable);
  NS_IMETHOD Undo(PRUint32 aCount);
  NS_IMETHOD CanUndo(PRBool &aIsEnabled, PRBool &aCanUndo);
  NS_IMETHOD Redo(PRUint32 aCount);
  NS_IMETHOD CanRedo(PRBool &aIsEnabled, PRBool &aCanRedo);
  NS_IMETHOD BeginTransaction();
  NS_IMETHOD EndTransaction();

// Selection and navigation
  NS_IMETHOD MoveSelectionUp(nsIAtom *aIncrement, PRBool aExtendSelection);
  NS_IMETHOD MoveSelectionDown(nsIAtom *aIncrement, PRBool aExtendSelection);
  NS_IMETHOD MoveSelectionNext(nsIAtom *aIncrement, PRBool aExtendSelection);
  NS_IMETHOD MoveSelectionPrevious(nsIAtom *aIncrement, PRBool aExtendSelection);
  NS_IMETHOD SelectNext(nsIAtom *aIncrement, PRBool aExtendSelection); 
  NS_IMETHOD SelectPrevious(nsIAtom *aIncrement, PRBool aExtendSelection);
  NS_IMETHOD SelectAll();
  NS_IMETHOD BeginningOfDocument();
  NS_IMETHOD EndOfDocument();
  NS_IMETHOD ScrollUp(nsIAtom *aIncrement);
  NS_IMETHOD ScrollDown(nsIAtom *aIncrement);
  NS_IMETHOD ScrollIntoView(PRBool aScrollToBegin);

// file handling
  NS_IMETHOD Save();
  NS_IMETHOD SaveAs(PRBool aSavingCopy);

// cut, copy & paste
  NS_IMETHOD Cut();
  NS_IMETHOD Copy();
  NS_IMETHOD Paste();
  NS_IMETHOD PasteAsQuotation();
  NS_IMETHOD PasteAsCitedQuotation(const nsString& aCitation);
  NS_IMETHOD InsertAsQuotation(const nsString& aQuotedText);
  NS_IMETHOD InsertAsCitedQuotation(const nsString& aQuotedText,
                                    const nsString& aCitation);

// Input/Output
  NS_IMETHOD InsertHTML(const nsString& aInputString);

  NS_IMETHOD BeginComposition(void);
  NS_IMETHOD SetCompositionString(const nsString& aCompositionString, nsIDOMTextRangeList* aTextRange);
  NS_IMETHOD EndComposition(void);

  NS_IMETHOD OutputToString(nsString& aOutputString,
                            const nsString& aFormatType,
                            PRUint32 aFlags);
  NS_IMETHOD OutputToStream(nsIOutputStream* aOutputStream,
                            const nsString& aFormatType,
                            const nsString* aCharsetOverride,
                            PRUint32 aFlags);

// Miscellaneous
  NS_IMETHOD ApplyStyleSheet(const nsString& aURL);

// Logging methods

  NS_IMETHOD StartLogging(nsIFileSpec *aLogFile);
  NS_IMETHOD StopLogging();

// End of methods implemented in nsEditor
//=============================================================
// HTML Editing methods

  // This sets background on the appropriate container element (table, cell,)
  //   or calls into nsTextEditor to set the page background
  NS_IMETHOD SetBackgroundColor(const nsString& aColor);
  NS_IMETHOD SetBodyAttribute(const nsString& aAttr, const nsString& aValue);
  NS_IMETHOD GetParagraphStyle(nsStringArray *aTagList);
  NS_IMETHOD AddBlockParent(nsString& aParentTag);
  NS_IMETHOD ReplaceBlockParent(nsString& aParentTag);
  NS_IMETHOD RemoveParagraphStyle();
  NS_IMETHOD RemoveParent(const nsString &aParentTag);

  NS_IMETHOD GetParagraphFormat(nsString& aParagraphFormat);
  NS_IMETHOD SetParagraphFormat(const nsString& aParagraphFormat);

  NS_IMETHOD Indent(const nsString& aIndent);
  NS_IMETHOD Align(const nsString& aAlign);
  NS_IMETHOD InsertList(const nsString& aListType);

// MHTML helper methods
  NS_IMETHOD GetEmbeddedObjects(nsISupportsArray** aNodeList);

  NS_IMETHOD GetElementOrParentByTagName(const nsString& aTagName, nsIDOMNode *aNode, nsIDOMElement** aReturn);
  NS_IMETHOD GetSelectedElement(const nsString& aTagName, nsIDOMElement** aReturn);
  NS_IMETHOD CreateElementWithDefaults(const nsString& aTagName, nsIDOMElement** aReturn);
  NS_IMETHOD InsertElement(nsIDOMElement* aElement, PRBool aDeleteSelection);
  NS_IMETHOD SaveHLineSettings(nsIDOMElement* aElement);
  NS_IMETHOD InsertLinkAroundSelection(nsIDOMElement* aAnchorElement);
  NS_IMETHOD SelectElement(nsIDOMElement* aElement);
  NS_IMETHOD SetCaretAfterElement(nsIDOMElement* aElement);
  // Return TRUE if aElement is a table-related elemet and caret was set
  PRBool     SetCaretInTableCell(nsIDOMElement* aElement);
  PRBool     IsElementInBody(nsIDOMElement* aElement);

// Table Editing (implemented in EditTable.cpp)

  // Helper used to get nsITableLayout interface for methods implemented in nsTableFrame
  NS_IMETHOD GetTableLayoutObject(nsIDOMElement* aTable, nsITableLayout **tableLayoutObject);
  /** Get the row an column index from the layout's cellmap */
  NS_IMETHOD GetCellIndexes(nsIDOMElement *aCell, PRInt32 & aRowIndex, PRInt32 &aColIndex);
  /** Get the number of rows and columns in a table from the layout's cellmap */
  NS_IMETHOD GetTableSize(nsIDOMElement *aTable, PRInt32& aRowCount, PRInt32& aColCount);

  /* Get cell at a cellmap location. Returns NS_TABLELAYOUT_CELL_NOT_FOUND if past end of row or col */
  NS_IMETHOD GetCellAt(nsIDOMElement* aTable, PRInt32 aRowIndex, PRInt32 aColIndex, nsIDOMElement* &aCell);
  /* Get cell and associated data */
  NS_IMETHOD GetCellDataAt(nsIDOMElement* aTable, PRInt32 aRowIndex, PRInt32 aColIndex, nsIDOMElement* &aCell, 
                           PRInt32& aStartRowIndex, PRInt32& aStartColIndex, 
                           PRInt32& aRowSpan, PRInt32& aColSpan, PRBool& aIsSelected);

  NS_IMETHOD InsertTable();
  NS_IMETHOD InsertTableCell(PRInt32 aNumber, PRBool aAfter);
  NS_IMETHOD InsertTableColumn(PRInt32 aNumber, PRBool aAfter);
  NS_IMETHOD InsertTableRow(PRInt32 aNumber, PRBool aAfter);
  NS_IMETHOD DeleteTable();
  NS_IMETHOD DeleteTableCell(PRInt32 aNumber);
  NS_IMETHOD DeleteTableColumn(PRInt32 aNumber);
  NS_IMETHOD DeleteTableRow(PRInt32 aNumber);
  NS_IMETHOD JoinTableCells(PRBool aCellToRight);
  
protected:
  
// rules initialization

  virtual void  InitRules();

  NS_IMETHOD ReParentContentOfNode(nsIDOMNode *aNode, 
                                   nsString   &aParentTag,
                                   BlockTransformationType aTranformation);

  NS_IMETHOD ReParentBlockContent(nsIDOMNode  *aNode, 
                                  nsString    &aParentTag,
                                  nsIDOMNode  *aBlockParentNode,
                                  nsString    &aBlockParentTag,
                                  BlockTransformationType aTranformation,
                                  nsIDOMNode **aNewParentNode);
  
  NS_IMETHOD ReParentContentOfRange(nsIDOMRange *aRange, 
                                    nsString    &aParentTag,
                                    BlockTransformationType aTranformation);

  NS_IMETHOD RemoveParagraphStyleFromRange(nsIDOMRange *aRange);
  
  NS_IMETHOD RemoveParagraphStyleFromBlockContent(nsIDOMRange *aRange);

  NS_IMETHOD RemoveParentFromRange(const nsString &aParentTag, nsIDOMRange *aRange);
  
  NS_IMETHOD RemoveParentFromBlockContent(const nsString &aParentTag, nsIDOMRange *aRange);

  NS_IMETHOD IsRootTag(nsString &aTag, PRBool &aIsTag);

  NS_IMETHOD IsSubordinateBlock(nsString &aTag, PRBool &aIsTag);


// EVENT LISTENERS AND COMMAND ROUTING NEEDS WORK
// For now, the listners are tied to the nsTextEditor class
//
//  nsCOMPtr<nsIDOMEventListener> mKeyListenerP;
//  nsCOMPtr<nsIDOMEventListener> mMouseListenerP;

  // this overrides the base class implementation. It is not exported in nsIHTMLEditor.
  NS_IMETHOD DebugUnitTests(PRInt32 *outNumTests, PRInt32 *outNumTestsFailed);

};

#endif //nsHTMLEditor_h__