/**
 * @license Copyright (C) 2011 Google Inc.
 *
 * 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.
 */
package prettify.lang;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.regex.Pattern;
import prettify.parser.Prettify;

/**
 * This is similar to the lang-clj.js in JavaScript Prettify.
 * 
 * All comments are adapted from the JavaScript Prettify.
 * 
 * <p>
 * Registers a language handler for Clojure.
 *
 *
 * To use, include prettify.js and this file in your HTML page.
 * Then put your code in an HTML tag like
 *      <pre class="prettyprint lang-lisp">(my lisp code)</pre>
 * The lang-cl class identifies the language as common lisp.
 * This file supports the following language extensions:
 *     lang-clj - Clojure
 *
 *
 * I used lang-lisp.js as the basis for this adding the clojure specific
 * keywords and syntax.
 *
 * "Name"    = 'Clojure'
 * "Author"  = 'Rich Hickey'
 * "Version" = '1.2'
 * "About"   = 'Clojure is a lisp for the jvm with concurrency primitives and a richer set of types.'
 *
 *
 * I used <a href="http://clojure.org/Reference">Clojure.org Reference</a> as
 * the basis for the reserved word list.
 *
 *
 * @author jwall@google.com
 */
public class LangClj extends Lang {

  public LangClj() {
    List<List<Object>> _shortcutStylePatterns = new ArrayList<List<Object>>();
    List<List<Object>> _fallthroughStylePatterns = new ArrayList<List<Object>>();

    // clojure has more paren types than minimal lisp.
    _shortcutStylePatterns.add(Arrays.asList(new Object[]{"opn", Pattern.compile("^[\\(\\{\\[]+"), null, "([{"}));
    _shortcutStylePatterns.add(Arrays.asList(new Object[]{"clo", Pattern.compile("^[\\)\\}\\]]+"), null, ")]}"}));
    // A line comment that starts with ;
    _shortcutStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_COMMENT, Pattern.compile("^;[^\r\n]*"), null, ";"}));
    // Whitespace
    _shortcutStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_PLAIN, Pattern.compile("^[\t\n\r \\xA0]+"), null, "\t\n\r " + Character.toString((char) 0xA0)}));
    // A double quoted, possibly multi-line, string.
    _shortcutStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_STRING, Pattern.compile("^\\\"(?:[^\\\"\\\\]|\\\\[\\s\\S])*(?:\\\"|$)"), null, "\""}));
    // clojure has a much larger set of keywords
    _fallthroughStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_KEYWORD, Pattern.compile("^(?:def|if|do|let|quote|var|fn|loop|recur|throw|try|monitor-enter|monitor-exit|defmacro|defn|defn-|macroexpand|macroexpand-1|for|doseq|dosync|dotimes|and|or|when|not|assert|doto|proxy|defstruct|first|rest|cons|defprotocol|deftype|defrecord|reify|defmulti|defmethod|meta|with-meta|ns|in-ns|create-ns|import|intern|refer|alias|namespace|resolve|ref|deref|refset|new|set!|memfn|to-array|into-array|aset|gen-class|reduce|map|filter|find|nil?|empty?|hash-map|hash-set|vec|vector|seq|flatten|reverse|assoc|dissoc|list|list?|disj|get|union|difference|intersection|extend|extend-type|extend-protocol|prn)\\b"), null}));
    _fallthroughStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_TYPE, Pattern.compile("^:[0-9a-zA-Z\\-]+")}));

    setShortcutStylePatterns(_shortcutStylePatterns);
    setFallthroughStylePatterns(_fallthroughStylePatterns);
  }

  public static List<String> getFileExtensions() {
    return Arrays.asList(new String[]{"clj"});
  }
}