// Copyright (C) 2012 Pyrios.
//
// 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 prettify.parser.Prettify;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.regex.Pattern;

/**
 * This is similar to the lang-tcl.js in JavaScript Prettify.
 *
 * All comments are adapted from the JavaScript Prettify.
 *
 * 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-tcl">proc foo {} {puts bar}</pre>
 *
 * I copy-pasted lang-lisp.js, so this is probably not 100% accurate.
 * I used http://wiki.tcl.tk/1019 for the keywords, but tried to only
 * include as keywords that had more impact on the program flow
 * rather than providing convenience. For example, I included 'if'
 * since that provides branching, but left off 'open' since that is more
 * like a proc. Add more if it makes sense.
 *
 * @author pyrios@gmail.com
 */
public class LangTcl extends Lang {

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

        _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, "\""}));

        _fallthroughStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_KEYWORD, Pattern.compile("^(?:after|append|apply|array|break|case|catch|continue|error|eval|exec|exit|expr|for|foreach|if|incr|info|proc|return|set|switch|trace|uplevel|upvar|while)\\b"), null}));
        _fallthroughStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_LITERAL, Pattern.compile("^[+\\-]?(?:[0#]x[0-9a-f]+|\\d+\\/\\d+|(?:\\.\\d+|\\d+(?:\\.\\d*)?)(?:[ed][+\\-]?\\d+)?)", Pattern.CASE_INSENSITIVE)}));
        // A single quote possibly followed by a word that optionally ends with
        // = ! or ?.
        _fallthroughStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_LITERAL, Pattern.compile("^\\'(?:-*(?:\\w|\\\\[\\x21-\\x7e])(?:[\\w-]*|\\\\[\\x21-\\x7e])[=!?]?)?")}));
        // A word that optionally ends with = ! or ?.
        _fallthroughStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_PLAIN, Pattern.compile("^-*(?:[a-z_]|\\\\[\\x21-\\x7e])(?:[\\w-]*|\\\\[\\x21-\\x7e])[=!?]?")}));
        // A printable non-space non-special character
        _fallthroughStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_PUNCTUATION, Pattern.compile("^[^\\w\\t\\n\\r \\xA0()\\\"\\\\\\';]+")}));

        setShortcutStylePatterns(_shortcutStylePatterns);
        setFallthroughStylePatterns(_fallthroughStylePatterns);
    }

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