io.wcm.handler.richtext.impl.RichTextHandlerImpl.java Source code

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Here is the source code for io.wcm.handler.richtext.impl.RichTextHandlerImpl.java

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/*
 * #%L
 * wcm.io
 * %%
 * Copyright (C) 2014 wcm.io
 * %%
 * 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.
 * #L%
 */
package io.wcm.handler.richtext.impl;

import io.wcm.handler.media.MediaArgs;
import io.wcm.handler.richtext.RichText;
import io.wcm.handler.richtext.RichTextBuilder;
import io.wcm.handler.richtext.RichTextHandler;
import io.wcm.handler.richtext.RichTextNameConstants;
import io.wcm.handler.richtext.RichTextRequest;
import io.wcm.handler.richtext.TextMode;
import io.wcm.handler.richtext.util.RewriteContentHandler;
import io.wcm.handler.richtext.util.RichTextUtil;
import io.wcm.handler.url.UrlMode;
import io.wcm.sling.models.annotations.AemObject;

import java.util.ArrayList;
import java.util.List;

import org.apache.commons.lang3.StringUtils;
import org.apache.sling.api.SlingHttpServletRequest;
import org.apache.sling.api.resource.Resource;
import org.apache.sling.models.annotations.Model;
import org.apache.sling.models.annotations.injectorspecific.Self;
import org.jdom2.Content;
import org.jdom2.Element;
import org.jdom2.JDOMException;
import org.jdom2.Text;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.day.cq.wcm.api.Page;
import com.google.common.collect.ImmutableList;

/**
 * Default implementation of {@link RichTextHandler}.
 */
@Model(adaptables = { SlingHttpServletRequest.class, Resource.class }, adapters = RichTextHandler.class)
public final class RichTextHandlerImpl implements RichTextHandler {

    static final Logger log = LoggerFactory.getLogger(RichTextHandlerImpl.class);

    @Self
    private RewriteContentHandler rewriteContentHandler;
    @AemObject
    private Page currentPage;

    @Override
    public RichTextBuilder get(Resource resource) {
        return new RichTextBuilderImpl(resource, this);
    }

    @Override
    public RichTextBuilder get(String text) {
        return new RichTextBuilderImpl(text, this);
    }

    RichText processRequest(RichTextRequest richTextRequest) {
        String text = getRawText(richTextRequest);
        TextMode textMode = getTextMode(richTextRequest);

        List<Content> content;
        if (textMode == TextMode.XHTML) {
            content = processRichText(text, richTextRequest.getUrlMode(), richTextRequest.getMediaArgs());
        } else {
            content = processPlainText(text);
        }

        return new RichText(richTextRequest, content);
    }

    private String getRawText(RichTextRequest richTextRequest) {
        if (richTextRequest.getResource() != null) {
            return richTextRequest.getResourceProperties().get(RichTextNameConstants.PN_TEXT, String.class);
        } else {
            return richTextRequest.getText();
        }
    }

    private TextMode getTextMode(RichTextRequest richTextRequest) {
        if (richTextRequest.getTextMode() != null) {
            return richTextRequest.getTextMode();
        } else if (richTextRequest.getResource() != null) {
            boolean textIsRich = richTextRequest.getResourceProperties().get(RichTextNameConstants.PN_TEXT_IS_RICH,
                    true);
            return textIsRich ? TextMode.XHTML : TextMode.PLAIN;
        } else {
            return TextMode.XHTML;
        }
    }

    private List<Content> processRichText(String text, UrlMode urlMode, MediaArgs mediaArgs) {
        if (isEmpty(text)) {
            return ImmutableList.of();
        }

        // Parse text
        try {
            Element contentParent = RichTextUtil.parseText(text, true);

            // Rewrite content (e.g. anchor tags)
            RichTextUtil.rewriteContent(contentParent, rewriteContentHandler);

            // return xhtml elements
            return ImmutableList.copyOf(contentParent.cloneContent());
        } catch (JDOMException ex) {
            log.debug("Unable to parse XHTML text."
                    + (currentPage != null ? " Current page is " + currentPage.getPath() + "." : ""), ex);
            return ImmutableList.of();
        }
    }

    private List<Content> processPlainText(String text) {
        if (StringUtils.isBlank(text)) {
            return ImmutableList.of();
        }

        List<Content> content = new ArrayList<>();
        String[] lines = StringUtils.splitByWholeSeparatorPreserveAllTokens(text, "\n");
        for (int i = 0; i < lines.length; i++) {
            if (i > 0) {
                content.add(new Element("br"));
            }
            content.add(new Text(lines[i]));
        }

        return ImmutableList.copyOf(content);
    }

    @Override
    public boolean isEmpty(String text) {
        return RichTextUtil.isEmpty(text);
    }

}