org.docx4j.template.handler.OutputConversionHTMLStyleElementHandler.java Source code

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Here is the source code for org.docx4j.template.handler.OutputConversionHTMLStyleElementHandler.java

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/*
 * Copyright (c) 2018, vindell (https://github.com/vindell).
 *
 * 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.docx4j.template.handler;

import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URI;
import java.net.URISyntaxException;
import java.nio.charset.Charset;

import org.apache.commons.io.IOUtils;
import org.docx4j.Docx4jProperties;
import org.docx4j.convert.out.ConversionHTMLStyleElementHandler;
import org.docx4j.openpackaging.packages.OpcPackage;
import org.docx4j.template.Docx4jConstants;
import org.w3c.dom.Document;
import org.w3c.dom.Element;

public class OutputConversionHTMLStyleElementHandler implements ConversionHTMLStyleElementHandler {

    private static final OutputConversionHTMLStyleElementHandler OUTPUT_CONVERSION_HTMLSTYLE_ELEMENT_HANDLER = new OutputConversionHTMLStyleElementHandler();

    /**
     * Generate a OutputConversionHTMLStyleElementHandler.
     * @return the OutputConversionHTMLStyleElementHandler
     */
    public static OutputConversionHTMLStyleElementHandler getStyleElementHandler() {
        return OUTPUT_CONVERSION_HTMLSTYLE_ELEMENT_HANDLER;
    }

    protected OutputConversionHTMLStyleElementHandler() {

    }

    @Override
    public Element createStyleElement(OpcPackage opcPackage, Document document, String styleDefinition) {

        // See XsltHTMLFunctions, which typically generates the String styleDefinition.
        // In practice, the styles are coupled to the document content, so you're
        // less likely to override their content; just whether they are linked or inline.

        Element ret = null;
        if ((styleDefinition != null) && (styleDefinition.length() > 0)) {
            ret = document.createElement("style");
            ret.setAttribute("type", "text/css");
            ret.appendChild(document.createComment(styleDefinition));
        }

        /**Key = docx4j.Convert.Out.HTML.CssIncludeUri*/
        String cssIncludeUri = Docx4jProperties.getProperty(Docx4jConstants.DOCX4J_CONVERT_OUT_HTML_CSSINCLUDEURI);
        if ((cssIncludeUri != null) && (cssIncludeUri.length() > 0)) {
            try {
                ret = document.createElement("style");
                ret.setAttribute("type", "text/css");
                ret.appendChild(
                        document.createComment(IOUtils.toString(new URI(cssIncludeUri), Charset.defaultCharset())));
            } catch (IOException e) {
                //do nothing
            } catch (URISyntaxException e) {
                //do nothing
            }
        }
        /**Key = docx4j.Convert.Out.HTML.CssIncludePath*/
        String cssIncludePath = Docx4jProperties
                .getProperty(Docx4jConstants.DOCX4J_CONVERT_OUT_HTML_CSSINCLUDEPATH);
        if ((cssIncludePath != null) && (cssIncludePath.length() > 0)) {
            InputStream input = null;
            try {
                input = new FileInputStream(cssIncludePath);
                ret = document.createElement("style");
                ret.setAttribute("type", "text/css");
                ret.appendChild(document.createComment(IOUtils.toString(input, Charset.defaultCharset())));
            } catch (IOException e) {
                //do nothing
            } finally {
                IOUtils.closeQuietly(input);
            }
        }

        return ret;
    }

}