com.sangupta.pep.macros.EmbedImagesMacro.java Source code

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Here is the source code for com.sangupta.pep.macros.EmbedImagesMacro.java

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/**
 *
 * Pep - Slideshows using HTML5
 * Copyright (c) 2012, Sandeep Gupta
 * 
 * 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 com.sangupta.pep.macros;

import java.io.File;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.apache.commons.lang.StringUtils;

import com.sangupta.pep.ContentAndClasses;
import com.sangupta.pep.IMacro;
import com.sangupta.pep.PepUtils;

public class EmbedImagesMacro implements IMacro {

    protected static final Pattern PATTERN = Pattern.compile("<img\\s.*?src=\"(.+?)\"\\s?.*?/?>",
            Pattern.DOTALL | Pattern.UNICODE_CASE);

    @Override
    public ContentAndClasses process(String content, File parentDir) {
        Matcher matcher = PATTERN.matcher(content);
        while (matcher.find()) {
            // String imageTag = matcher.group();
            String imageUrl = matcher.group(1);

            // encode image
            String encodedUrl = PepUtils.encodeImageFromUrl(imageUrl);
            if (encodedUrl == null) {
                System.out.println("Failed to embed image from url: " + imageUrl);
                continue;
            }

            // replace original image with encoded image
            content = StringUtils.replace(content, imageUrl, encodedUrl, 1);
        }

        return new ContentAndClasses(content);
    }

}