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/*
* Copyright 1999-2004 The Apache Software Foundation.
*
* 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.
*/
/* $Id$ */
package org.apache.fop.render.ps;
import org.apache.batik.bridge.SVGTextElementBridge;
import org.apache.batik.bridge.BridgeContext;
import org.apache.batik.gvt.GraphicsNode;
import org.apache.batik.gvt.TextNode;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
/**
* Bridge class for the <text> element.
* This bridge will use the direct text painter if the text
* for the element is simple.
*
* @author <a href="mailto:fop-dev@xml.apache.org">Apache XML FOP Development Team</a>
* @version $Id: PSTextElementBridge.java,v 1.2 2003/03/07 09:46:30 jeremias Exp $
*/
public class PSTextElementBridge extends SVGTextElementBridge {
private PSTextPainter textPainter;
/**
* Constructs a new bridge for the <text> element.
* @param textPainter the text painter to use
*/
public PSTextElementBridge(PSTextPainter textPainter) {
this.textPainter = textPainter;
}
/**
* Create a text element bridge.
* This set the text painter on the node if the text is simple.
* @param ctx the bridge context
* @param e the svg element
* @return the text graphics node created by the super class
*/
public GraphicsNode createGraphicsNode(BridgeContext ctx, Element e) {
GraphicsNode node = super.createGraphicsNode(ctx, e);
/* this code is worthless I think. PSTextPainter does a much better job
* at determining whether to stroke or not. */
if (true/*node != null && isSimple(ctx, e, node)*/) {
((TextNode)node).setTextPainter(getTextPainter());
}
return node;
}
private PSTextPainter getTextPainter() {
return this.textPainter;
}
/**
* Check if text element contains simple text.
* This checks the children of the text element to determine
* if the text is simple. The text is simple if it can be rendered
* with basic text drawing algorithms. This means there are no
* alternate characters, the font is known and there are no effects
* applied to the text.
*
* @param ctx the bridge context
* @param element the svg text element
* @param node the graphics node
* @return true if this text is simple of false if it cannot be
* easily rendered using normal drawString on the PDFGraphics2D
*/
private boolean isSimple(BridgeContext ctx, Element element, GraphicsNode node) {
for (Node n = element.getFirstChild();
n != null;
n = n.getNextSibling()) {
switch (n.getNodeType()) {
case Node.ELEMENT_NODE:
if (n.getLocalName().equals(SVG_TSPAN_TAG)
|| n.getLocalName().equals(SVG_ALT_GLYPH_TAG)) {
return false;
} else if (n.getLocalName().equals(SVG_TEXT_PATH_TAG)) {
return false;
} else if (n.getLocalName().equals(SVG_TREF_TAG)) {
return false;
}
break;
case Node.TEXT_NODE:
case Node.CDATA_SECTION_NODE:
default:
}
}
/*if (CSSUtilities.convertFilter(element, node, ctx) != null) {
return false;
}*/
return true;
}
}
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