TextGroup.java

/*
 * $Id: TextGroup.java 341 2012-06-18 14:38:54Z blowagie $
 *
 * This file is part of the iText (R) project.
 * Copyright (c) 1998-2012 1T3XT BVBA
 * Authors: VVB, Bruno Lowagie, et al.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License version 3
 * as published by the Free Software Foundation with the addition of the
 * following permission added to Section 15 as permitted in Section 7(a):
 * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY 1T3XT,
 * 1T3XT DISCLAIMS THE WARRANTY OF NON INFRINGEMENT OF THIRD PARTY RIGHTS.
 *
 * This program 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 Affero General Public License for more details.
 * You should have received a copy of the GNU Affero General Public License
 * along with this program; if not, see http://www.gnu.org/licenses or write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA, 02110-1301 USA, or download the license from the following URL:
 * http://itextpdf.com/terms-of-use/
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License.
 *
 * In accordance with Section 7(b) of the GNU Affero General Public License,
 * a covered work must retain the producer line in every PDF that is created
 * or manipulated using iText.
 *
 * You can be released from the requirements of the license by purchasing
 * a commercial license. Buying such a license is mandatory as soon as you
 * develop commercial activities involving the iText software without
 * disclosing the source code of your own applications.
 * These activities include: offering paid services to customers as an ASP,
 * serving PDFs on the fly in a web application, shipping iText with a closed
 * source product.
 *
 * For more information, please contact iText Software Corp. at this
 * address: sales@itextpdf.com
 */
package com.itextpdf.tool.xml.svg.graphic;

import java.util.List;
import java.util.Map;


import com.itextpdf.text.Element;
import com.itextpdf.text.pdf.PdfContentByte;
import com.itextpdf.text.pdf.PdfTemplate;
import com.itextpdf.tool.xml.svg.tags.Graphic;


public class TextGroup extends Graphic {
	final List<Element> list;
	final float width, height, x, y;
	
	public TextGroup(List<Element> list, float x, float y, float width, float height, Map<String, String> css) {
		super(css);
		this.list = list;
		this.width = width;
		this.height = height;
		this.x = x;
		this.y = y;
	}
	
	void drawGroup(PdfContentByte cb) {
		//TODO if width and height not know: what to do
		//PdfTemplate template = cb.createTemplate(this.width, this.height);		
		PdfTemplate template = cb.createTemplate(500, 500);
		//draw the list of elements on the new template
		
		List<Integer> xSpacing = null, ySpacing = null;	
		float defaultSpacing = template.getCharacterSpacing();
		float rise = 0;
		
		template.beginText();
		//
		for (Element elem : this.list){
			Text text = (Text) elem;
			//CssSvgAppliers.getInstance().applyForText(, text.getCss(), text.getChunk());
			CssSvgAppliers.getInstance().applyForText(template, text.getCss(), text.getChunk());
			
		    if(!text.isRelative()){
		    	//when there are x,y coordinates in the text or tspan
		    	template.setTextMatrix(text.getX(), -1 * text.getY());
		    }		    
		   	    
		    //System.out.println(text.chunk.getFont());
		    
		    //the spacing
		    if(text.getDx() != null){
		    	xSpacing = text.getDx();		    	
		    }
		    if(text.getDy() != null){
		    	ySpacing = text.getDy();	
		    	rise = 0;
		    }		    
		    if(xSpacing != null || ySpacing != null){		    	
		    	String display = text.getText();
		    	for (int i = 0; i < display.length() ; i++) {
		    		if(xSpacing != null && xSpacing.size() > 0){
		    			template.setCharacterSpacing(xSpacing.get(0));
		    			xSpacing.remove(0);
		    		}
		    		if(ySpacing != null && ySpacing.size() > 0){
		    			rise = rise - ySpacing.get(0);
		    			template.setTextRise(rise);
		    			ySpacing.remove(0);
		    		}else{
		    			template.setTextRise(rise);
		    		}
		    		template.showText(display.substring(i, i+1));
		    		
		    		template.setCharacterSpacing(defaultSpacing);
		    	}
		    }else{
		    	template.showText(text.getText());
		    }
		}
		template.endText();
		//add the template at the x, y position
		cb.concatCTM(1,0,0,-1,0,0);
		
		cb.add(template);
	}
	
	@Override
	public void draw(PdfContentByte cb) {
		drawGroup(cb);
	}

}