fop/fop-core/src/main/java/org/apache/fop/render/ps/PSSVGFlowRootElementBridge.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 java.text.AttributedCharacterIterator;
import java.util.List;

import org.apache.batik.bridge.FlowTextPainter;
import org.apache.batik.bridge.TextNode;
import org.apache.batik.bridge.TextPainter;
import org.apache.batik.bridge.svg12.SVGFlowRootElementBridge;
import org.apache.batik.gvt.GraphicsNode;

import org.apache.fop.fonts.FontInfo;

/**
 * Element Bridge for SVG 1.2 flow text, so those texts can be painted using
 * PDF primitives.
 */
public class PSSVGFlowRootElementBridge extends SVGFlowRootElementBridge {

    private PSTextPainter textPainter;

    /**
     * Main Constructor.
     * @param fontInfo the font directory
     */
    public PSSVGFlowRootElementBridge(FontInfo fontInfo) {
        this.textPainter = new PSFlowTextPainter(fontInfo);
    }

    /** {@inheritDoc} */
    protected GraphicsNode instantiateGraphicsNode() {
        GraphicsNode node = super.instantiateGraphicsNode();
        if (node != null) {
            //Set our own text painter
            ((TextNode)node).setTextPainter(getTextPainter());
        }
        return node;
    }

    /**
     * Returns the text painter used by this bridge.
     * @return the text painter
     */
    public TextPainter getTextPainter() {
        return this.textPainter;
    }

    private class PSFlowTextPainter extends PSTextPainter {

        /**
         * Main constructor
         * @param fontInfo the font directory
         */
        public PSFlowTextPainter(FontInfo fontInfo) {
            super(fontInfo);
        }

        /** {@inheritDoc} */
        public List getTextRuns(TextNode node, AttributedCharacterIterator aci) {
            //Text runs are delegated to the normal FlowTextPainter, we just paint the text.
            FlowTextPainter delegate = (FlowTextPainter)FlowTextPainter.getInstance();
            return delegate.getTextRuns(node, aci);
        }

    }

}