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ChangeCSSInlineStyleTxn.h
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00001 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
00002 /* ***** BEGIN LICENSE BLOCK *****
00003  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00004  *
00005  * The contents of this file are subject to the Mozilla Public License Version
00006  * 1.1 (the "License"); you may not use this file except in compliance with
00007  * the License. You may obtain a copy of the License at
00008  * http://www.mozilla.org/MPL/
00009  *
00010  * Software distributed under the License is distributed on an "AS IS" basis,
00011  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00012  * for the specific language governing rights and limitations under the
00013  * License.
00014  *
00015  * The Original Code is mozilla.org code.
00016  *
00017  * The Initial Developer of the Original Code is
00018  * Netscape Communications Corporation.
00019  * Portions created by the Initial Developer are Copyright (C) 1998
00020  * the Initial Developer. All Rights Reserved.
00021  *
00022  * Contributor(s):
00023  *   Original Author: Daniel Glazman <glazman@netscape.com>
00024  *
00025  * Alternatively, the contents of this file may be used under the terms of
00026  * either of the GNU General Public License Version 2 or later (the "GPL"),
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00028  * in which case the provisions of the GPL or the LGPL are applicable instead
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00036  *
00037  * ***** END LICENSE BLOCK ***** */
00038 
00039 #ifndef ChangeCSSInlineStyleTxn_h__
00040 #define ChangeCSSInlineStyleTxn_h__
00041 
00042 #include "EditTxn.h"
00043 #include "nsCOMPtr.h"
00044 #include "nsIDOMElement.h"
00045 #include "nsIEditor.h"
00046 
00047 #define CHANGE_CSSINLINESTYLE_TXN_CID \
00048 {/* a2185c9e-1dd1-11b2-88d6-d89704bf7a5a */ \
00049 0xa2185c9e, 0x1dd1, 0x11b2, \
00050 {0x88, 0xd6, 0xd8, 0x97, 0x04, 0xbf, 0x7a, 0x5a} }
00051 
00056 class ChangeCSSInlineStyleTxn : public EditTxn
00057 {
00058 public:
00059 
00060   static const nsIID& GetCID() { static const nsIID iid = CHANGE_CSSINLINESTYLE_TXN_CID; return iid; }
00061 
00062   virtual ~ChangeCSSInlineStyleTxn();
00063 
00071   NS_IMETHOD Init(nsIEditor      * aEditor,
00072                   nsIDOMElement  * aElement,
00073                   nsIAtom        * aProperty,
00074                   const nsAString & aValue,
00075                   PRBool aRemoveProperty);
00076 
00084   static PRBool ValueIncludes(const nsAString & aValueList, const nsAString & aValue, PRBool aCaseSensitive);
00085 
00091   NS_IMETHOD AddValueToMultivalueProperty(nsAString & aValues, const nsAString  & aNewValue);
00092 
00093 private:
00094   ChangeCSSInlineStyleTxn();
00095 
00101   PRBool AcceptsMoreThanOneValue(nsIAtom * aCSSProperty);
00102 
00107   void   RemoveValueFromListOfValues(nsAString & aValues, const nsAString  & aRemoveValue);
00108 
00115   void   AppendDeclaration(nsAString & aOutputString,
00116                            const nsAString & aProperty,
00117                            const nsAString & aValues);
00118 
00124   nsresult SetStyle(PRBool aAttributeWasSet, nsAString & aValue);
00125 
00126 public:
00127 
00128   NS_IMETHOD DoTransaction(void);
00129 
00130   NS_IMETHOD UndoTransaction(void);
00131 
00132   NS_IMETHOD RedoTransaction(void);
00133 
00134   NS_IMETHOD Merge(nsITransaction *aTransaction, PRBool *aDidMerge);
00135 
00136   NS_IMETHOD GetTxnDescription(nsAString& aTxnDescription);
00137 
00138 protected:
00139 
00141   nsIEditor *mEditor;
00142   
00144   nsCOMPtr<nsIDOMElement> mElement;
00145   
00147   nsIAtom *mProperty;
00148 
00150   nsString mValue;
00151 
00153   nsString mUndoValue;
00155   nsString mRedoValue;
00157   PRBool   mUndoAttributeWasSet;
00159   PRBool   mRedoAttributeWasSet;
00160 
00162   PRBool   mRemoveProperty;
00163 
00164   friend class TransactionFactory;
00165 };
00166 
00167 #endif