org.jpedal.examples.viewer.commands.generic.GUICopy Maven / Gradle / Ivy
/*
* ===========================================
* Java Pdf Extraction Decoding Access Library
* ===========================================
*
* Project Info: http://www.idrsolutions.com
* Help section for developers at http://www.idrsolutions.com/support/
*
* (C) Copyright 1997-2017 IDRsolutions and Contributors.
*
* This file is part of JPedal/JPDF2HTML5
*
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* ---------------
* GUICopy.java
* ---------------
*/
package org.jpedal.examples.viewer.commands.generic;
import org.jpedal.PdfDecoderInt;
import org.jpedal.examples.viewer.Values;
import org.jpedal.exception.PdfException;
import org.jpedal.grouping.PdfGroupingAlgorithms;
import org.jpedal.gui.GUIFactory;
import org.jpedal.objects.PdfPageData;
import org.jpedal.utils.Messages;
import org.jpedal.utils.Strip;
/**
* Class to hold generic code for JavaFXCopy.java and Copy.java.
*/
public class GUICopy {
/**
* routine to link GUI into text extraction functions
*
* @param decode_pdf Displayed PDF file
* @param currentGUI The Viewer
* @param commonValues Stores data including Page Number
* @return Extracted text
*/
public static String copySelectedText(final PdfDecoderInt decode_pdf, final GUIFactory currentGUI, final Values commonValues) {
if (!decode_pdf.isExtractionAllowed()) {
currentGUI.showMessageDialog("Not allowed");
return "";
}
final StringBuilder returnValue = new StringBuilder("");
final int[][] highlights = decode_pdf.getTextLines().getHighlightedAreasAs2DArray(commonValues.getCurrentPage());
if (highlights == null) {
return "";
}
final boolean multipleAreas = (highlights.length > 1);
final PdfPageData page_data = decode_pdf.getPdfPageData();
final int cropX = page_data.getCropBoxX(commonValues.getCurrentPage());
final int cropY = page_data.getCropBoxY(commonValues.getCurrentPage());
final int cropW = page_data.getCropBoxWidth(commonValues.getCurrentPage());
final int cropH = page_data.getCropBoxHeight(commonValues.getCurrentPage());
if (highlights != null) {
for (int t = 0; t != highlights.length; t++) {
/*
* ensure co-ords in right order
*/
highlights[t] = adjustHighlightForExtraction(highlights[t]);
int t_x1 = highlights[t][0];
int t_x2 = highlights[t][0] + highlights[t][2];
int t_y1 = highlights[t][1] + highlights[t][3];
int t_y2 = highlights[t][1];
if (t_y1 < t_y2) {
final int temp = t_y2;
t_y2 = t_y1;
t_y1 = temp;
}
if (t_x1 > t_x2) {
final int temp = t_x2;
t_x2 = t_x1;
t_x1 = temp;
}
if (t_x1 < cropX) {
t_x1 = cropX;
}
if (t_x1 > cropW + cropX) {
t_x1 = cropW + cropX;
}
if (t_x2 < cropX) {
t_x2 = cropX;
}
if (t_x2 > cropW + cropX) {
t_x2 = cropW + cropX;
}
if (t_y1 < cropY) {
t_y1 = cropY;
}
if (t_y1 > cropH + cropY) {
t_y1 = cropH + cropY;
}
if (t_y2 < cropY) {
t_y2 = cropY;
}
if (t_y2 > cropH + cropY) {
t_y2 = cropH + cropY;
}
String extractedText;
try {
/*
* create a grouping object to apply grouping to data
*/
final PdfGroupingAlgorithms currentGrouping = decode_pdf.getGroupingObject();
/*
* get the text
*/
extractedText = currentGrouping.extractTextInRectangle(
t_x1, t_y1, t_x2, t_y2, commonValues.getCurrentPage(), false,
true);
/*
*find out if xml or text - as we need to turn xml off
* before extraction. So we assume xml and strip out. This
* is obviously
*/
if (extractedText == null || extractedText.isEmpty()) {
if (!multipleAreas) {
currentGUI.showMessageDialog(Messages.getMessage("PdfViewerMessage.NoTextFound"));
}
} else {
extractedText = Strip.stripXML(extractedText, decode_pdf.isXMLExtraction()).toString();
}
if (extractedText != null) //Add extractedText & newline to returnValue
{
returnValue.append(extractedText).append((char) 0x0D).append((char) 0x0A);
}
} catch (final PdfException e) {
System.err.println("Exception " + e.getMessage()
+ " in file " + commonValues.getSelectedFile());
e.printStackTrace();
}
}
}
if (returnValue.length() > 2) {
return returnValue.substring(0, returnValue.length() - 2);
} else {
return "";
}
}
/**
* Increase size of highlight area to ensure it fully encompasses the text
* to be extracted
*
* @param highlight : original highlight area
* @return updated highlgiht area
*/
public static int[] adjustHighlightForExtraction(final int[] highlight) {
final int x = highlight[0] - 1;
final int y = highlight[1] - 3;
final int width = highlight[2] + 2;
final int height = highlight[3] + 6;
return new int[]{x, y, width, height};
}
}