AbstractSVGSAXGenerator.java

/*******************************************************************************
 * Copyright 2010 Simon Mieth
 * 
 * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/

package org.kabeja.svg.generators;

import java.util.Map;

import org.kabeja.DraftDocument;
import org.kabeja.common.Color;
import org.kabeja.common.DraftEntity;
import org.kabeja.common.LineType;
import org.kabeja.svg.SVGConstants;
import org.kabeja.svg.SVGContext;
import org.kabeja.svg.SVGSAXGenerator;
import org.kabeja.svg.SVGUtils;
import org.xml.sax.helpers.AttributesImpl;

public abstract class AbstractSVGSAXGenerator implements SVGSAXGenerator {

	
	public void setCommonAttributes(AttributesImpl atts, Map context,
			DraftEntity entity) {
		
		setVisibilityAttribute(atts, entity);
		setXMLIDAttribute(atts, entity);
		setColorAttribute(atts, entity);
		setStrokeAttribute(atts, context, entity);
		
	}
	
	
	
	public void setCommonTextAttributes(AttributesImpl atts, Map context,
			DraftEntity entity){
		setVisibilityAttribute(atts, entity);
		setXMLIDAttribute(atts, entity);
		setColorAttribute(atts, entity);
		SVGUtils.addAttribute(atts, SVGConstants.SVG_ATTRIBUTE_STROKE,
				SVGConstants.SVG_ATTRIBUTE_FILL_VALUE_NONE);
		SVGUtils.addAttribute(atts, SVGConstants.SVG_ATTRIBUTE_FILL,SVGConstants.SVG_ATTRIBUTE_VALUE_CURRENTCOLOR );
	}
	
	
	protected void setVisibilityAttribute(AttributesImpl atts,	DraftEntity entity){
		// a negative color indicates the layer is off
		if (!entity.isVisibile()) {
			// we calculate the bounds self so they must not
			// rendered from the SVG-Renderer.
			// If they should be in the rendering-tree change
			// this to visible=hidden
			SVGUtils.addAttribute(atts, SVGConstants.SVG_ATTRIBUTE_DISPLAY,
					SVGConstants.SVG_ATTRIBUTE_DISPLAY_VALUE_NONE);
		}

	}
	
	
	protected void setColorAttribute(AttributesImpl atts,	DraftEntity entity){
		// color 256 indicates color by layer
		int color = entity.getColor();

		if ((color != 0) && (color != 256)) {
		    //check RGB color first
		    byte[] b = entity.getColorRGB();
		    if(b.length==3){
		        SVGUtils.addAttribute(atts, SVGConstants.SVG_ATTRIBUTE_COLOR,
	                                Color.getRGBString(b));
		    }else{
		    
			SVGUtils.addAttribute(atts, SVGConstants.SVG_ATTRIBUTE_COLOR,
					Color.getRGBString(color));
		    }
			
		}
	}
	
	
	protected void setXMLIDAttribute(AttributesImpl atts,	DraftEntity entity){
	
			SVGUtils.addAttribute(atts, SVGConstants.XML_ID, SVGUtils
					.toValidateID(entity.getID()));
		
	}
	
	
	
	protected void setStrokeAttribute(AttributesImpl atts, Map context,
			DraftEntity entity){
		
		
		
		SVGUtils.addAttribute(atts, SVGConstants.SVG_ATTRIBUTE_STROKE,
				SVGConstants.SVG_ATTRIBUTE_VALUE_CURRENTCOLOR);
		
		if ((entity.getLineWeight() > 0)
				&& !context.containsKey(SVGContext.DRAFT_STROKE_WIDTH_IGNORE)) {
			SVGUtils.addAttribute(atts,
					SVGConstants.SVG_ATTRIBUTE_STROKE_WITDH, SVGUtils
							.lineWeightToStrokeWidth(entity.getLineWeight()));
		} 

		DraftDocument doc = entity.getDocument();

		double gscale = doc.getHeader().getLinetypeScale();

		

		if (entity.hasLineType() && !entity.isOmitLineType()) {
		
			gscale = gscale * entity.getLinetypeScaleFactor();
			SVGUtils.addStrokeDashArrayAttribute(atts,entity.getLineType(), gscale);
			
			
		} else if (!entity.isOmitLineType()) {
			// get the line type from layer
			LineType ltype =  entity.getLayer().getLineType();

			if (ltype != null) {
				gscale = gscale * entity.getLinetypeScaleFactor();
				SVGUtils.addStrokeDashArrayAttribute(atts, ltype, (entity
						.getLinetypeScaleFactor() * gscale));
			} else if (entity.isOmitLineType()) {
				SVGUtils.addAttribute(atts,
						SVGConstants.SVG_ATTRIBUTE_STROKE_DASHARRAY, "");
			}
		}
	}
}