| // Copyright (C) 2012 Jeffrey 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-rd.js in JavaScript Prettify. |
| * <p/> |
| * Support for R documentation (Rd) files |
| * <p/> |
| * Minimal highlighting or Rd files, basically just highlighting |
| * macros. It does not try to identify verbatim or R-like regions of |
| * macros as that is too complicated for a lexer. Descriptions of the |
| * Rd format can be found |
| * http://cran.r-project.org/doc/manuals/R-exts.html and |
| * http://developer.r-project.org/parseRd.pdf. |
| * |
| * @author Jeffrey Arnold |
| */ |
| public class LangRd extends Lang { |
| |
| public LangRd() { |
| 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)})); |
| // all comments begin with '%' |
| _shortcutStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_COMMENT, Pattern.compile("^%[^\\r\\n]*"), null, "%"})); |
| |
| // special macros with no args |
| _fallthroughStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_LITERAL, Pattern.compile("^\\\\(?:cr|l?dots|R|tab)\\b")})); |
| // macros |
| _fallthroughStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_KEYWORD, Pattern.compile("^\\\\[a-zA-Z@]+")})); |
| // highlighted as macros, since technically they are |
| _fallthroughStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_KEYWORD, Pattern.compile("^#(?:ifn?def|endif)")})); |
| // catch escaped brackets |
| _fallthroughStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_PLAIN, Pattern.compile("^\\\\[{}]")})); |
| // punctuation |
| _fallthroughStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_PUNCTUATION, Pattern.compile("^[{}()\\[\\]]+")})); |
| |
| setShortcutStylePatterns(_shortcutStylePatterns); |
| setFallthroughStylePatterns(_fallthroughStylePatterns); |
| } |
| |
| public static List<String> getFileExtensions() { |
| return Arrays.asList(new String[]{"Rd", "rd"}); |
| } |
| } |