com.lowagie.text.pdf.parser.SimpleTextExtractingPdfContentStreamProcessor Maven / Gradle / Ivy
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Itext is a java library to create and manipulate PDFs.
This is a fork of version 2.1.7 the last MPL/LGPL version.
It's focused basically on mantain compatibility with newer bouncycastle releases and small bugfixes.
/*
* Copyright 2008 by Kevin Day.
*
* 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) 1999-2008 by Bruno Lowagie.
* All Rights Reserved.
* Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
* are Copyright (C) 2000-2008 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.pdf.parser;
/**
* A simple text extraction processor.
* @since 2.1.4
*/
public class SimpleTextExtractingPdfContentStreamProcessor extends PdfContentStreamProcessor {
/** keeps track of a text matrix. */
Matrix lastTextLineMatrix = null;
/** keeps track of a text matrix. */
Matrix lastEndingTextMatrix = null;
/** The StringBuffer used to write the resulting String. */
StringBuffer result = null;
/**
* Creates a new text extraction processor.
*/
public SimpleTextExtractingPdfContentStreamProcessor() {
super();
result = new StringBuffer();
}
public void reset() {
super.reset();
lastTextLineMatrix = null;
lastEndingTextMatrix = null;
result = new StringBuffer();
}
/**
* Returns the result so far.
* @return a String with the resulting text.
*/
public String getResultantText(){
return result.toString();
}
/**
* Writes text to the result.
* @param text The text that needs to be displayed
* @param endingTextMatrix a text matrix
* @see com.lowagie.text.pdf.parser.PdfContentStreamProcessor#displayText(java.lang.String, com.lowagie.text.pdf.parser.Matrix)
*/
public void displayText(String text, Matrix endingTextMatrix){
boolean hardReturn = false;
if (lastTextLineMatrix != null && lastTextLineMatrix.get(Matrix.I32) != getCurrentTextLineMatrix().get(Matrix.I32)){
hardReturn = true;
}
float currentX = getCurrentTextMatrix().get(Matrix.I31);
if (hardReturn){
result.append('\n');
} else if (lastEndingTextMatrix != null){
float lastEndX = lastEndingTextMatrix.get(Matrix.I31);
float spaceGlyphWidth = gs().font.getWidth(' ')/1000f;
float spaceWidth = (spaceGlyphWidth * gs().fontSize + gs().characterSpacing + gs().wordSpacing) * gs().horizontalScaling; // this is unscaled!!
Matrix scaled = new Matrix(spaceWidth, 0).multiply(getCurrentTextMatrix());
float scaledSpaceWidth = scaled.get(Matrix.I31) - getCurrentTextMatrix().get(Matrix.I31);
if (currentX - lastEndX > scaledSpaceWidth/2f ){
result.append(' ');
}
}
if (text != null && result != null) {
result.append(text);
}
lastTextLineMatrix = getCurrentTextLineMatrix();
lastEndingTextMatrix = endingTextMatrix;
}
}