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+/**
+ * Copyright (c) 2005, www.pdfbox.org
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * 3. Neither the name of pdfbox; nor the names of its
+ * contributors may be used to endorse or promote products derived from this
+ * software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * http://www.pdfbox.org
+ *
+ */
+package org.pdfbox.util;
+
+import java.awt.Rectangle;
+import java.io.IOException;
+import java.io.StringWriter;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.Vector;
+
+import org.pdfbox.cos.COSStream;
+import org.pdfbox.pdmodel.PDPage;
+import org.pdfbox.pdmodel.common.PDStream;
+
+/**
+ * This will extract text from a specified region in the PDF.
+ *
+ * @author Ben Litchfield (ben@benlitchfield.com)
+ * @version $Revision: 1.3 $
+ */
+public class PDFTextStripperByArea extends PDFTextStripper
+{
+ private List regions = new ArrayList();
+ private Map regionArea = new HashMap();
+ private Map regionCharacterList = new HashMap();
+ private Map regionText = new HashMap();
+
+ /**
+ * Constructor.
+ * @throws IOException If there is an error loading properties.
+ */
+ public PDFTextStripperByArea() throws IOException
+ {
+ super();
+ }
+
+ /**
+ * Add a new region to group text by.
+ *
+ * @param regionName The name of the region.
+ * @param rect The rectangle area to retrieve the text from.
+ */
+ public void addRegion( String regionName, Rectangle rect )
+ {
+ regions.add( regionName );
+ regionArea.put( regionName, rect );
+ }
+
+ /**
+ * Get the list of regions that have been setup.
+ *
+ * @return A list of java.lang.String objects to identify the region names.
+ */
+ public List getRegions()
+ {
+ return regions;
+ }
+
+ /**
+ * Get the text for the region, this should be called after extractRegions().
+ *
+ * @param regionName The name of the region to get the text from.
+ * @return The text that was identified in that region.
+ */
+ public String getTextForRegion( String regionName )
+ {
+ StringWriter text = (StringWriter)regionText.get( regionName );
+ return text.toString();
+ }
+
+ /**
+ * Process the page to extract the region text.
+ *
+ * @param page The page to extract the regions from.
+ * @throws IOException If there is an error while extracting text.
+ */
+ public void extractRegions( PDPage page ) throws IOException
+ {
+ Iterator regionIter = regions.iterator();
+ while( regionIter.hasNext() )
+ {
+ //reset the stored text for the region so this class
+ //can be reused.
+ String regionName = (String)regionIter.next();
+ Vector regionCharactersByArticle = new Vector();
+ regionCharactersByArticle.add( new ArrayList() );
+ regionCharacterList.put( regionName, regionCharactersByArticle );
+ regionText.put( regionName, new StringWriter() );
+ }
+
+ PDStream contentStream = page.getContents();
+ if( contentStream != null )
+ {
+ COSStream contents = contentStream.getStream();
+ processPage( page, contents );
+ }
+ }
+
+ /**
+ * @see PDFTextStripper#showCharacter(TextPosition)
+ */
+ protected void showCharacter( TextPosition text )
+ {
+ Iterator regionIter = regionArea.keySet().iterator();
+ while( regionIter.hasNext() )
+ {
+ String region = (String)regionIter.next();
+ Rectangle rect = (Rectangle)regionArea.get( region );
+ if( rect.contains( text.getX(), text.getY() ) )
+ {
+ charactersByArticle = (Vector)regionCharacterList.get( region );
+ super.showCharacter( text );
+ }
+ }
+ }
+
+ /**
+ * This will print the text to the output stream.
+ *
+ * @throws IOException If there is an error writing the text.
+ */
+ protected void flushText() throws IOException
+ {
+ Iterator regionIter = regionArea.keySet().iterator();
+ while( regionIter.hasNext() )
+ {
+ String region = (String)regionIter.next();
+ charactersByArticle = (Vector)regionCharacterList.get( region );
+ output = (StringWriter)regionText.get( region );
+ super.flushText();
+ }
+ }
+}