| // Copyright (C) 2008 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-lua.js in JavaScript Prettify. |
| * |
| * All comments are adapted from the JavaScript Prettify. |
| * |
| * <p> |
| * Registers a language handler for Lua. |
| * |
| * |
| * 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-lua">(my Lua code)</pre> |
| * |
| * |
| * I used http://www.lua.org/manual/5.1/manual.html#2.1 |
| * Because of the long-bracket concept used in strings and comments, Lua does |
| * not have a regular lexical grammar, but luckily it fits within the space |
| * of irregular grammars supported by javascript regular expressions. |
| * |
| * @author mikesamuel@gmail.com |
| */ |
| public class LangLua extends Lang { |
| |
| public LangLua() { |
| List<List<Object>> _shortcutStylePatterns = new ArrayList<List<Object>>(); |
| List<List<Object>> _fallthroughStylePatterns = new ArrayList<List<Object>>(); |
| |
| // 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 or single quoted, possibly multi-line, string. |
| _shortcutStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_STRING, Pattern.compile("^(?:\\\"(?:[^\\\"\\\\]|\\\\[\\s\\S])*(?:\\\"|$)|\\'(?:[^\\'\\\\]|\\\\[\\s\\S])*(?:\\'|$))"), null, "\"'"})); |
| // A comment is either a line comment that starts with two dashes, or |
| // two dashes preceding a long bracketed block. |
| _fallthroughStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_COMMENT, Pattern.compile("^--(?:\\[(=*)\\[[\\s\\S]*?(?:\\]\\1\\]|$)|[^\\r\\n]*)")})); |
| // A long bracketed block not preceded by -- is a string. |
| _fallthroughStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_STRING, Pattern.compile("^\\[(=*)\\[[\\s\\S]*?(?:\\]\\1\\]|$)")})); |
| _fallthroughStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_KEYWORD, Pattern.compile("^(?:and|break|do|else|elseif|end|false|for|function|if|in|local|nil|not|or|repeat|return|then|true|until|while)\\b"), null})); |
| // A number is a hex integer literal, a decimal real literal, or in |
| // scientific notation. |
| _fallthroughStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_LITERAL, Pattern.compile("^[+-]?(?:0x[\\da-f]+|(?:(?:\\.\\d+|\\d+(?:\\.\\d*)?)(?:e[+\\-]?\\d+)?))", Pattern.CASE_INSENSITIVE)})); |
| // An identifier |
| _fallthroughStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_PLAIN, Pattern.compile("^[a-z_]\\w*", Pattern.CASE_INSENSITIVE)})); |
| // A run of punctuation |
| _fallthroughStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_PUNCTUATION, Pattern.compile("^[^\\w\\t\\n\\r \\xA0][^\\w\\n\\r \\xA0\\\"\\'\\-\\+=]*")})); |
| |
| setShortcutStylePatterns(_shortcutStylePatterns); |
| setFallthroughStylePatterns(_fallthroughStylePatterns); |
| } |
| |
| public static List<String> getFileExtensions() { |
| return Arrays.asList(new String[]{"lua"}); |
| } |
| } |