| /* |
| * Copyright (c) 2017, 2018, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code 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 General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package build.tools.taglet; |
| |
| import java.util.EnumSet; |
| import java.util.List; |
| import java.util.Set; |
| import java.util.regex.Matcher; |
| import java.util.regex.Pattern; |
| import javax.lang.model.element.Element; |
| |
| import com.sun.source.doctree.DocTree; |
| import com.sun.source.doctree.UnknownInlineTagTree; |
| import jdk.javadoc.doclet.Taglet; |
| |
| import static com.sun.source.doctree.DocTree.Kind.*; |
| |
| /** |
| * An inline tag to conveniently insert an external link. |
| * The tag can be used as follows: |
| * {@extLink name description}, for example |
| * <p> |
| * {@code Please see {@extLink Borealis a spectacular} sight.} |
| * <p> |
| * will produce the following html |
| * <p> |
| * {@code |
| * Please see <a href="https://www.oracle.com/pls/topic/lookup?ctx=javase10&id=Borealis">a spectacular</a> sight. |
| * } |
| */ |
| public class ExtLink implements Taglet { |
| static final String SPEC_VERSION; |
| |
| static { |
| SPEC_VERSION = System.getProperty("extlink.spec.version"); |
| if (SPEC_VERSION == null) { |
| throw new RuntimeException("extlink.spec.version property not set"); |
| } |
| } |
| |
| static final String TAG_NAME = "extLink"; |
| |
| static final String URL = "https://www.oracle.com/pls/topic/lookup?ctx=javase" + |
| SPEC_VERSION + "&id="; |
| |
| static final Pattern TAG_PATTERN = Pattern.compile("(?s)(\\s*)(?<name>\\w+)(\\s+)(?<desc>.*)$"); |
| |
| |
| /** |
| * Returns the set of locations in which the tag may be used. |
| */ |
| @Override |
| public Set<Location> getAllowedLocations() { |
| return EnumSet.allOf(jdk.javadoc.doclet.Taglet.Location.class); |
| } |
| |
| @Override |
| public boolean isInlineTag() { |
| return true; |
| } |
| |
| @Override |
| public String getName() { |
| return TAG_NAME; |
| } |
| |
| @Override |
| public String toString(List<? extends DocTree> tags, Element elem) { |
| |
| if (tags.isEmpty()) |
| return ""; |
| |
| DocTree tag = tags.get(0); |
| if (tag.getKind() != UNKNOWN_INLINE_TAG) |
| return ""; |
| |
| UnknownInlineTagTree uitree = (UnknownInlineTagTree) tag; |
| if (uitree.getContent().isEmpty()) |
| return ""; |
| |
| String tagText = uitree.getContent().get(0).toString(); |
| Matcher m = TAG_PATTERN.matcher(tagText); |
| if (!m.find()) |
| return ""; |
| |
| StringBuilder sb = new StringBuilder("<a href=\""); |
| sb.append(URL) |
| .append(m.group("name")) |
| .append("\">") |
| .append(m.group("desc")) |
| .append("</a>"); |
| |
| return sb.toString(); |
| } |
| } |