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142 lines
5.6 KiB
C++
142 lines
5.6 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Original Author: Daniel Glazman <glazman@netscape.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef ChangeCSSInlineStyleTxn_h__
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#define ChangeCSSInlineStyleTxn_h__
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#include "EditTxn.h"
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#include "nsCOMPtr.h"
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#include "nsIDOMElement.h"
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#include "nsIEditor.h"
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/**
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* A transaction that changes the value of a CSS inline style of a content node.
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* This transaction covers add, remove, and change a property's value.
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*/
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class ChangeCSSInlineStyleTxn : public EditTxn
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{
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public:
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/** Initialize the transaction.
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* @param aEditor [IN] the object providing core editing operations
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* @param aNode [IN] the node whose style attribute will be changed
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* @param aProperty [IN] the name of the property to change
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* @param aValue [IN] the new value for aProperty, if aRemoveProperty is false
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* @param aRemoveProperty [IN] if true, remove aProperty from style attribute
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*/
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NS_IMETHOD Init(nsIEditor * aEditor,
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nsIDOMElement * aElement,
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nsIAtom * aProperty,
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const nsAString & aValue,
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bool aRemoveProperty);
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/** returns true if the list of white-space separated values contains aValue
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*
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* @return true if the value is in the list of values
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* @param aValueList [IN] a list of white-space separated values
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* @param aValue [IN] the value to look for in the list
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* @param aCaseSensitive [IN] a boolean being true if a case-sensitive search is needed
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*/
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static bool ValueIncludes(const nsAString & aValueList, const nsAString & aValue, bool aCaseSensitive);
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/** adds the value aNewValue to the list of white-space separated values aValues
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*
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* @param aValues [IN/OUT] a list of wite-space separated values
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* @param aNewValue [IN] a value this code adds to aValues if it is not already in
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*/
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NS_IMETHOD AddValueToMultivalueProperty(nsAString & aValues, const nsAString & aNewValue);
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ChangeCSSInlineStyleTxn();
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private:
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/** returns true if the property accepts more than one value
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*
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* @return true if the property accepts more than one value
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* @param aCSSProperty [IN] the CSS property
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*/
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bool AcceptsMoreThanOneValue(nsIAtom * aCSSProperty);
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/** remove a value from a list of white-space separated values
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* @param aValues [IN] a list of white-space separated values
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* @param aRemoveValue [IN] the value to remove from the list
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*/
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void RemoveValueFromListOfValues(nsAString & aValues, const nsAString & aRemoveValue);
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/** If the boolean is true and if the value is not the empty string,
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* set the property in the transaction to that value; if the value
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* is empty, remove the property from element's styles. If the boolean
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* is false, just remove the style attribute.
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*/
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nsresult SetStyle(bool aAttributeWasSet, nsAString & aValue);
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public:
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NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(ChangeCSSInlineStyleTxn, EditTxn)
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NS_IMETHOD QueryInterface(REFNSIID aIID, void** aInstancePtr);
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NS_DECL_EDITTXN
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NS_IMETHOD RedoTransaction();
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protected:
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/** the editor that created this transaction */
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nsIEditor *mEditor;
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/** the element to operate upon */
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nsCOMPtr<nsIDOMElement> mElement;
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/** the CSS property to change */
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nsIAtom *mProperty;
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/** the value to set the property to (ignored if mRemoveProperty==true) */
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nsString mValue;
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/** the value to set the property to for undo */
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nsString mUndoValue;
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/** the value to set the property to for redo */
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nsString mRedoValue;
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/** true if the style attribute was present and not empty before DoTransaction */
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bool mUndoAttributeWasSet;
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/** true if the style attribute is present and not empty after DoTransaction */
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bool mRedoAttributeWasSet;
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/** true if the operation is to remove mProperty from mElement */
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bool mRemoveProperty;
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};
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#endif
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