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/* $Id: RtfCtrlWordHandler.java 3427 2008-05-24 18:32:31Z xlv $
*
* Copyright 2007 by Howard Shank ([email protected])
*
* The contents of this file are subject to the Mozilla 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/MPL/
*
* 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 'iText, a free JAVA-PDF library'.
*
* The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
* the Initial Developer are Copyright (C) 1999-2006 by Bruno Lowagie.
* All Rights Reserved.
* Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
* are Copyright (C) 2000-2006 by Paulo Soares. All Rights Reserved.
*
* Contributor(s): all the names of the contributors are added in the source code
* where applicable.
*
* Alternatively, the contents of this file may be used under the terms of the
* LGPL license (the ?GNU LIBRARY GENERAL PUBLIC LICENSE?), in which case the
* provisions of LGPL are applicable instead of those above. If you wish to
* allow use of your version of this file only under the terms of the LGPL
* License and not to allow others to use your version of this file under
* the MPL, indicate your decision by deleting the provisions above and
* replace them with the notice and other provisions required by the LGPL.
* If you do not delete the provisions above, a recipient may use your version
* of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the MPL as stated above or under the terms of the GNU
* Library General Public License as published by the Free Software Foundation;
* either version 2 of the License, or any later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
* details.
*
* If you didn't download this code from the following link, you should check if
* you aren't using an obsolete version:
* http://www.lowagie.com/iText/
*/
package com.lowagie.text.rtf.parser.ctrlwords;
import com.lowagie.text.rtf.parser.RtfParser;
import com.lowagie.text.rtf.parser.destinations.RtfDestination;
import com.lowagie.text.rtf.parser.destinations.RtfDestinationMgr;
/**
* RtfCtrlWordBase is the base class for all
* control word handlers to extend from.
*
* @author Howard Shank ([email protected])
* @since 2.0.8
*/
public class RtfCtrlWordHandler implements Cloneable {
/**
* Debug flag - internal use
* @since 2.0.8
*/
private static final boolean debug = false;
/**
* Local variable referencing the parser object.
* @since 2.0.8
*/
protected RtfParser rtfParser = null;
/**
* The control word for this class.
* @since 2.0.8
*/
protected String ctrlWord = "";
/**
* The default value for this control word.
* Not all control words use a default parameter value.
* @since 2.0.8
*/
protected int defaultParameterValue = 0;
/**
* Does this control word use the default value?
* @since 2.0.8
*/
protected boolean passDefaultParameterValue = false;
/**
* Control Word type. Destination, toggle, value, etc.
* @since 2.0.8
*/
protected int ctrlWordType = RtfCtrlWordType.UNIDENTIFIED;
/**
* Class, property, etc.
* @since 2.0.8
*/
protected String specialHandler = "";
/**
* What version of the RTF spec the control word was introduced.
* @since 2.0.8
*/
protected float rtfVersionSupported = -1.0f; // -1.0 unknown. Each class should override this as implemented.
/**
* The control word as parsed by the parser.
* @since 2.0.8
*/
protected RtfCtrlWordData ctrlWordData = null;
/**
* String containing the value of "{" or "" (blank) depending on if this is the
* first control word in a group.
* @since 2.0.8
*/
protected String groupPrefix = "";
/**
* The prefix for all control words.
* @since 2.0.8
*/
protected String ctrlWordPrefix = "\\";
/**
* The prefix for all control words.
* @since 2.0.8
*/
protected String ctrlWordSuffix = " ";
/**
* Hidden default constructor. Must use constructor with parameters.
* @see com.lowagie.text.rtf.parser.ctrlwords.RtfCtrlWordHandler#RtfCtrlWordHandler(RtfParser rtfParser, String ctrlWord, int defaultParameterValue, boolean passDefaultParameterValue, int ctrlWordType, String prefix, String suffix, String specialHandler)
* @since 2.0.8
*/
private RtfCtrlWordHandler(){}
/**
* Constructor:
*
* @param rtfParser
* The parser for this control word.
* @param ctrlWord
* The string value of this control word.
* @param defaultParameterValue
* The default value of this control word. Not all control words have values.
* @param passDefaultParameterValue
* Flag indicating if this control word should use the default value.
* @param ctrlWordType
* Indicator of the type of control word this is. DESTINATION|DESTINATION_EX|VALUE|FLAG|TOGGLE|SYMBOL
* @param prefix
* String to prefix the ctrl word with. "\" or "\*\" are the 2 used values.
* @param suffix
* String to add as suffix to the ctrl word. " " and "" are the 2 used values.
* @param specialHandler
* If TOGGLE then the property name as String (propertyGroup.propertyName format ex. "character.bold")
* If FLAG then the property name as String (propertyGroup.propertyName format ex. "character.bold")
* If VALUE then the property name as String (propertyGroup.propertyName format ex. "character.bold")
* If SYMBOL then the character to use for substitution as String
* If DESTINATION|DESTINATION_EX then the RtfDestination class name as String
*
* @since 2.0.8
*/
public RtfCtrlWordHandler(RtfParser rtfParser, String ctrlWord, int defaultParameterValue, boolean passDefaultParameterValue,
int ctrlWordType, String prefix, String suffix, String specialHandler) {
super();
this.rtfParser = rtfParser;
this.ctrlWord = ctrlWord;
this.defaultParameterValue = defaultParameterValue;
this.passDefaultParameterValue = passDefaultParameterValue;
this.ctrlWordType = ctrlWordType;
this.ctrlWordPrefix = prefix;
this.ctrlWordSuffix = suffix;
this.specialHandler = specialHandler;
if(this.ctrlWordType == RtfCtrlWordType.DESTINATION || this.ctrlWordType == RtfCtrlWordType.DESTINATION_EX){
if(this.specialHandler == null) {
this.specialHandler = "RtfDestinationNull";
}
String arg1 = ""; // stylesheet value - S, CS, TS
RtfDestinationMgr.addDestination(this.ctrlWord, new Object[] { this.specialHandler, arg1 });
} else {
if(this.ctrlWordType == RtfCtrlWordType.SYMBOL){
} else {
if(this.specialHandler == null) {
this.specialHandler = this.ctrlWord; // if null, make the property the name of the ctrl word
} else {
if(this.specialHandler.length() > 1 && this.specialHandler.endsWith(".")) {
this.specialHandler += this.ctrlWord; // if string length>1 and ends with a period, it's a group. Add ctrlWord
}
}
}
}
}
/**
* The primary control word handler method.
* Called by the parser once it has a control word and parameter if applicable.
*
* @param ctrlWordDataIn
* The control word and associated parameter if applicable.
* @return
* true or false if the control word was handled.
* @since 2.0.8
*/
public final boolean handleControlword(RtfCtrlWordData ctrlWordDataIn){
boolean result = false;
this.ctrlWordData = ctrlWordDataIn;
RtfDestination dest = null;
boolean handled = false;
this.ctrlWordData.prefix = this.ctrlWordPrefix;
this.ctrlWordData.suffix = this.ctrlWordSuffix;
this.ctrlWordData.newGroup = this.rtfParser.getState().newGroup;
this.ctrlWordData.ctrlWordType = this.ctrlWordType;
this.ctrlWordData.specialHandler = this.specialHandler;
if(!this.ctrlWordData.hasParam && this.passDefaultParameterValue) {
this.ctrlWordData.hasParam = true;
this.ctrlWordData.param = Integer.toString(this.defaultParameterValue);
}
if(debug) {
printDebug("handleKeyword: [" + this.ctrlWordData.ctrlWord + "] param=" + ctrlWordDataIn.param);
RtfParser.outputDebug(this.rtfParser.getRtfDocument(), this.rtfParser.getLevel()+1, "RtfCtrlWordHandler debug Start: " + this.ctrlWordData.ctrlWord + " ");
}
if(this.ctrlWordData.ctrlWord.equals("*")) {
return true;
}
if(!beforeControlWord()) {
return true;
}
switch(this.ctrlWordType) {
case RtfCtrlWordType.FLAG:
case RtfCtrlWordType.TOGGLE:
case RtfCtrlWordType.VALUE:
dest = this.rtfParser.getCurrentDestination();
if(dest != null) {
handled = dest.handleControlWord(this.ctrlWordData);
}
break;
case RtfCtrlWordType.SYMBOL:
dest = this.rtfParser.getCurrentDestination();
if(dest != null) {
String data = null;
// if doing an import, then put the control word in the output stream through the character handler
if(this.rtfParser.isImport()) {
data = this.ctrlWordPrefix + this.ctrlWordData.ctrlWord + this.ctrlWordSuffix;
}
if(this.rtfParser.isConvert()) {
data = this.specialHandler;
}
// If there is a substitute character, process the character.
// If no substitute character, then provide special handling in the destination for the ctrl word.
if(data != null) {
for(int idx=0; idx< data.length(); idx++) {
handled = dest.handleCharacter(data.charAt(idx));
}
} else {
handled = dest.handleControlWord(this.ctrlWordData);
}
}
break;
case RtfCtrlWordType.DESTINATION_EX:
case RtfCtrlWordType.DESTINATION:
// set the destination
int x=0;
if("shppict".equals(this.ctrlWord) || "nonshppict".equals(this.ctrlWord)) {
x++;
}
handled = this.rtfParser.setCurrentDestination(this.ctrlWord);
// let destination handle the ctrl word now.
dest = this.rtfParser.getCurrentDestination();
if(dest != null) {
if(dest.getNewTokeniserState() == RtfParser.TOKENISER_IGNORE_RESULT) {
handled = dest.handleControlWord(this.ctrlWordData);
}
else {
this.rtfParser.setTokeniserState(dest.getNewTokeniserState());
}
}
break;
}
afterControlWord();
if(debug) {
RtfParser.outputDebug(this.rtfParser.getRtfDocument(), this.rtfParser.getLevel()+1, "RtfCtrlWordHandler debug End: " + this.ctrlWordData.ctrlWord + " ");
}
return result;
}
/**
* Pre-processing before the control word.
*
* If return value is true, no further processing will be performed on
* this control word.
*
* @return false = stop processing, true = continue processing
* @since 2.0.8
*/
//Primary purpose is for \* control word and event handling.
protected boolean beforeControlWord() {
if(debug) printDebug("beforeControlWord");
// TODO: This is where events would be triggered
return true;
}
/**
* Handle the control word.
*
* @return true if control word was handled, false if it was not handled.
* @since 2.0.8
*/
protected boolean onControlWord() {
if(debug) printDebug("onCtrlWord");
// TODO: This is where events would be triggered
return false;
}
/**
* Post-processing after the control word.
*
* @return false = stop processing, true = continue processing
* @since 2.0.8
*/
protected boolean afterControlWord() {
if(debug) printDebug("afterControlWord");
// TODO: This is where events would be triggered
return true;
}
// public String ctrlWordString() {
// //String out = ctrlWordPrefix + this.ctrlWord;
// String out = "";
// if(this.bExtendedDestination) {
// out += "\\*";
// }
// out = ctrlWordPrefix + this.ctrlWordData.ctrlWord;
// if(this.ctrlWordData.hasParam) {
// if(this.ctrlWordData.isNeg) out += "-";
// out += this.ctrlWordData.param;
// } else {
// if(this.passDefaultParameterValue == true) {
// out += Integer.toString(this.defaultParameterValue);
// }
// }
// out += this.ctrlWordSuffix;
// return out;
// }
/**
* Debug function to print class/method
* @param txt The String to output.
* @since 2.0.8
*/
private final void printDebug(final String txt) {
System.out.println(this.getClass().getName() + " : " + txt);
}
}
