/*
* This library is part of OpenCms -
* the Open Source Content Management System
*
* Copyright (c) Alkacon Software GmbH (http://www.alkacon.com)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* For further information about Alkacon Software, please see the
* company website: http://www.alkacon.com
*
* For further information about OpenCms, please see the
* project website: http://www.opencms.org
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package org.opencms.workplace.comparison;
import com.alkacon.diff.Diff;
import org.opencms.i18n.CmsEncoder;
import org.opencms.jsp.CmsJspActionElement;
import org.opencms.util.CmsHtml2TextConverter;
import org.opencms.util.CmsStringUtil;
import org.opencms.workplace.CmsWorkplaceSettings;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.PageContext;
/**
* Provides a GUI for the file comparison dialog.<p>
*
* @since 6.0.0
*/
public class CmsHtmlDifferenceDialog extends CmsDifferenceDialog {
/** constant indicating that the html is to be compared.<p> */
public static final String MODE_HTML = "html";
/** constant indicating that a textual representation of the html is to be compared.<p> */
public static final String MODE_TEXT = "text";
/** request parameter for the textmode.<p> */
public static final String PARAM_TEXTMODE = "textmode";
/**
* Default constructor.<p>
*
* @param jsp an initialized JSP action element
*/
public CmsHtmlDifferenceDialog(CmsJspActionElement jsp) {
super(jsp);
}
/**
* Public constructor with JSP variables.<p>
*
* @param context the JSP page context
* @param req the JSP request
* @param res the JSP response
*/
public CmsHtmlDifferenceDialog(PageContext context, HttpServletRequest req, HttpServletResponse res) {
this(new CmsJspActionElement(context, req, res));
}
/**
* Performs the dialog actions depending on the initialized action and displays the dialog form.<p>
*
* @throws Exception if writing to the JSP out fails
*/
public void displayDialog() throws Exception {
if (getAction() == ACTION_CANCEL) {
actionCloseDialog();
}
JspWriter out = getJsp().getJspContext().getOut();
out.print("<link rel='stylesheet' type='text/css' href='");
out.print(getStyleUri(getJsp()));
out.println("diff.css'>");
out.println(dialogContentStart(getParamTitle()));
out.print("<form name='diff-form' method='post' action='");
out.print(getDialogUri());
out.println("'>");
out.println(allParamsAsHidden());
out.println("</form>");
out.println("<p>");
out.println(getDiffOnlyButtonsHtml());
String onClic1 = "javascript:document.forms['diff-form'].textmode.value = '";
onClic1 += MODE_TEXT;
onClic1 += "'; document.forms['diff-form'].submit();";
String onClic2 = "javascript:document.forms['diff-form'].textmode.value = '";
onClic2 += MODE_HTML;
onClic2 += "'; document.forms['diff-form'].submit();";
out.println(getTwoButtonsHtml(
Messages.get().container(Messages.GUI_DIFF_MODE_TEXT_0).key(getLocale()),
Messages.get().container(Messages.GUI_DIFF_MODE_HTML_0).key(getLocale()),
onClic1,
onClic2,
MODE_HTML.equals(getParamTextmode())));
out.println("</p>");
out.println(dialogBlockStart(null));
out.println("<table cellspacing='0' cellpadding='0' class='xmlTable'>\n<tr><td><pre style='overflow:auto'>");
try {
CmsHtmlDifferenceConfiguration conf = new CmsHtmlDifferenceConfiguration(getMode() == CmsDiffViewMode.ALL
? -1
: getLinesBeforeSkip(), getLocale());
String originalSource = getOriginalSource();
String copySource = getCopySource();
if (MODE_TEXT.equals(getParamTextmode())) {
originalSource = CmsHtml2TextConverter.html2text(originalSource, CmsEncoder.ENCODING_ISO_8859_1);
copySource = CmsHtml2TextConverter.html2text(copySource, CmsEncoder.ENCODING_ISO_8859_1);
}
String diff = Diff.diffAsHtml(originalSource, copySource, conf);
if (CmsStringUtil.isNotEmpty(diff)) {
out.println(diff);
} else {
String htmlDiff = Diff.diffAsHtml(getOriginalSource(), getCopySource(), conf);
if (CmsStringUtil.isNotEmpty(htmlDiff)) {
// extracted text is equal, but html differs
out.println(Messages.get().container(Messages.GUI_COMPARE_IDENTICAL_TEXT_DIFFERENT_HTML_0).key(
getLocale()));
} else if (getMode() == CmsDiffViewMode.ALL) {
// print original source, if there are no differences
out.println(wrapLinesWithUnchangedStyle(CmsStringUtil.substitute(
CmsStringUtil.escapeHtml(originalSource),
"<br/>",
"")));
}
}
} catch (Exception e) {
out.print(e);
}
out.println("</pre></td></tr>\n</table>");
out.println(dialogBlockEnd());
out.println(dialogContentEnd());
out.println(dialogEnd());
out.println(bodyEnd());
out.println(htmlEnd());
}
/**
* @see org.opencms.workplace.CmsWorkplace#initWorkplaceRequestValues(org.opencms.workplace.CmsWorkplaceSettings, javax.servlet.http.HttpServletRequest)
*/
protected void initWorkplaceRequestValues(CmsWorkplaceSettings settings, HttpServletRequest request) {
super.initWorkplaceRequestValues(settings, request);
if (CmsStringUtil.isEmptyOrWhitespaceOnly(getParamTextmode())) {
// ensure a valid mode is set
setParamTextmode(MODE_TEXT);
}
}
/**
*
* @see org.opencms.workplace.comparison.A_CmsDiffViewDialog#validateParamaters()
*/
protected void validateParamaters() {
// noop
}
}