| // Copyright (C) 2012 Jeffrey B. Arnold |
| // |
| // 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-r.js in JavaScript Prettify. |
| * <p/> |
| * 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-r"> code </pre> |
| * <p/> |
| * Language definition from |
| * http://cran.r-project.org/doc/manuals/R-lang.html. |
| * Many of the regexes are shared with the pygments SLexer, |
| * http://pygments.org/. |
| * <p/> |
| * Original: https://raw.github.com/jrnold/prettify-lang-r-bugs/master/lang-r.js |
| * |
| * @author jeffrey.arnold@gmail.com |
| */ |
| public class LangR extends Lang { |
| |
| public LangR() { |
| List<List<Object>> _shortcutStylePatterns = new ArrayList<List<Object>>(); |
| List<List<Object>> _fallthroughStylePatterns = new ArrayList<List<Object>>(); |
| |
| _shortcutStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_PLAIN, Pattern.compile("^[\\t\\n\\r \\xA0]+"), null, "\t\n\r " + Character.toString((char) 0xA0)})); |
| _shortcutStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_STRING, Pattern.compile("^\\\"(?:[^\\\"\\\\]|\\\\[\\s\\S])*(?:\\\"|$)"), null, "\""})); |
| _shortcutStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_STRING, Pattern.compile("^\\'(?:[^\\'\\\\]|\\\\[\\s\\S])*(?:\\'|$)"), null, "'"})); |
| |
| _fallthroughStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_COMMENT, Pattern.compile("^#.*")})); |
| _fallthroughStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_KEYWORD, Pattern.compile("^(?:if|else|for|while|repeat|in|next|break|return|switch|function)(?![A-Za-z0-9_.])")})); |
| // hex numbes |
| _fallthroughStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_LITERAL, Pattern.compile("^0[xX][a-fA-F0-9]+([pP][0-9]+)?[Li]?")})); |
| // Decimal numbers |
| _fallthroughStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_LITERAL, Pattern.compile("^[+-]?([0-9]+(\\.[0-9]+)?|\\.[0-9]+)([eE][+-]?[0-9]+)?[Li]?")})); |
| // builtin symbols |
| _fallthroughStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_LITERAL, Pattern.compile("^(?:NULL|NA(?:_(?:integer|real|complex|character)_)?|Inf|TRUE|FALSE|NaN|\\.\\.(?:\\.|[0-9]+))(?![A-Za-z0-9_.])")})); |
| // assignment, operators, and parens, etc. |
| _fallthroughStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_PUNCTUATION, Pattern.compile("^(?:<<?-|->>?|-|==|<=|>=|<|>|&&?|!=|\\|\\|?|\\*|\\+|\\^|\\/|!|%.*?%|=|~|\\$|@|:{1,3}|[\\[\\](){};,?])")})); |
| // valid variable names |
| _fallthroughStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_PLAIN, Pattern.compile("^(?:[A-Za-z]+[A-Za-z0-9_.]*|\\.[a-zA-Z_][0-9a-zA-Z\\._]*)(?![A-Za-z0-9_.])")})); |
| // string backtick |
| _fallthroughStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_STRING, Pattern.compile("^`.+`")})); |
| |
| setShortcutStylePatterns(_shortcutStylePatterns); |
| setFallthroughStylePatterns(_fallthroughStylePatterns); |
| } |
| |
| public static List<String> getFileExtensions() { |
| return Arrays.asList(new String[]{"r", "s", "R", "S", "Splus"}); |
| } |
| } |