001/*
002 * (C) Copyright 2006-2007 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 * Contributors:
017 *     Jean-Marc Orliaguet, Chalmers
018 *
019 * $Id$
020 */
021
022package org.nuxeo.theme.html;
023
024import java.util.regex.Matcher;
025import java.util.regex.Pattern;
026
027import org.apache.commons.logging.Log;
028import org.apache.commons.logging.LogFactory;
029import org.nuxeo.theme.elements.Element;
030import org.nuxeo.theme.fragments.Fragment;
031import org.nuxeo.theme.fragments.FragmentType;
032import org.nuxeo.theme.rendering.RenderingInfo;
033import org.nuxeo.theme.views.TemplateView;
034import org.nuxeo.theme.views.ViewType;
035
036public class HTMLView extends TemplateView {
037
038    private static final Log log = LogFactory.getLog(HTMLView.class);
039
040    private static final Pattern firstTagPattern = Pattern.compile("<([a-zA-Z0-9:]*)[^>]*>", Pattern.DOTALL);
041
042    private static final String[] ALLOWED_TAGS = { "html", "body", "table", "tr", "td", "div" };
043
044    @Override
045    public String render(final RenderingInfo info) {
046        final ViewType viewType = getViewType();
047        final String template = viewType.getTemplate();
048        String result = getTemplateContent(template);
049
050        // Sanity check
051        final Matcher matcher = firstTagPattern.matcher(result);
052        if (matcher.find()) {
053            final String tag = matcher.group(1).toLowerCase();
054            boolean found = false;
055            for (String allowedTag : ALLOWED_TAGS) {
056                if (tag.equals(allowedTag)) {
057                    found = true;
058                }
059            }
060            if (!found) {
061                // log.warn(String.format(
062                // "First HTML tag of view template: %s (<%s>) not one of <html>, <body>, <div>, <table>, <tr>, <td>",
063                // template, tag));
064            }
065        } else {
066            log.warn("First HTML tag of view template: " + template + " not found");
067        }
068
069        // replace model expressions
070        final Element element = info.getElement();
071        if (element instanceof Fragment) {
072            final Fragment fragment = (Fragment) element;
073            if (!info.isDirty() && hasModelExpressions(result)) {
074                final FragmentType fragmentType = fragment.getFragmentType();
075                String fragmentTypeName = fragmentType.getTypeName();
076                log.warn(String.format(
077                        "Cannot render \"%s\" with the view \"%s\" because the view's template contains a 'nxthemesInfo' variable and the fragment type is not declared as dynamic. Try to add <dynamic>true</dynamic> in the <fragment name=\"%s\"> definition.",
078                        fragmentTypeName, getViewType().getViewName(), fragmentTypeName));
079                return "";
080            }
081            result = replaceModelExpressions(info, result);
082        }
083
084        String cssClassName = element.getCssClassName();
085        if (cssClassName != null) {
086            result = CSSUtils.insertCssClass(result, cssClassName);
087        }
088
089        // replace [nxthemes markup] strings with the actual markup
090        result = result.replace("[nxthemes markup]", info.getMarkup());
091
092        return result;
093    }
094
095    public String replaceModelExpressions(@SuppressWarnings("unused") final RenderingInfo info, final String html) {
096        return html;
097    }
098
099    public boolean hasModelExpressions(final String html) {
100        return html.contains("nxthemesInfo");
101    }
102
103}