Attempts to remove all unnecessary P tags from html strings - Java java.lang

Java examples for java.lang:String Strip

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Description

Attempts to remove all unnecessary P tags from html strings

Demo Code

/**********************************************************************************
 * $URL$/*ww w. j a v  a  2  s. c  o m*/
 * $Id$
 ***********************************************************************************
 *
 * Copyright (c) 2008 The Sakai Foundation
 *
 * Licensed under the Educational Community 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.opensource.org/licenses/ECL-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.java2s;

public class Main {
    public static String ENDING_P_SPACE_TAGS = "<p>&nbsp;</p>";
    public static String STARTING_P_TAG = "<p>";
    public static String ENDING_P_TAG = "</p>";

    /**
     * Attempts to remove all unnecessary P tags from html strings
     * 
     * @param cleanup an html string to cleanup
     * @return the cleaned up string
     */
    public static String cleanupHtmlPtags(String cleanup) {
        if (cleanup == null) {
            // nulls are ok
            return null;
        } else if (cleanup.trim().length() == 0) {
            // nothing to do
            return cleanup;
        }
        cleanup = cleanup.trim();

        if (cleanup.length() > ENDING_P_SPACE_TAGS.length()) {
            // (remove trailing blank lines)
            // - While (cleanup ends with "<p>&nbsp;</p>") remove trailing "<p>&nbsp;</p>".
            while (cleanup.toLowerCase().endsWith(ENDING_P_SPACE_TAGS)) {
                // chop off the end
                cleanup = cleanup.substring(0,
                        cleanup.length() - ENDING_P_SPACE_TAGS.length())
                        .trim();
            }
        }

        if (cleanup.length() > (STARTING_P_TAG.length() + ENDING_P_TAG
                .length())) {
            // (remove a single set of <p> tags)
            // if cleanup starts with "<p>" and cleanup ends with "</p>" and, remove leading "<p>" and trailing "</p>" from cleanup
            String lcCheck = cleanup.toLowerCase();
            if (lcCheck.startsWith(STARTING_P_TAG)
                    && lcCheck.endsWith(ENDING_P_TAG)) {
                if (lcCheck
                        .indexOf(STARTING_P_TAG, STARTING_P_TAG.length()) == -1
                        && lcCheck.lastIndexOf(ENDING_P_TAG,
                                lcCheck.length() - ENDING_P_TAG.length()
                                        - 1) == -1) {
                    // chop off the front and end P tags
                    cleanup = cleanup.substring(STARTING_P_TAG.length(),
                            cleanup.length() - ENDING_P_TAG.length())
                            .trim();
                }
            }
        }
        //remove the bad <br type="_moz" />
        cleanup = cleanup.replace("<br type=\"_moz\" />", "");

        return cleanup;
    }
}

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