| // Copyright (C) 2013 Andrew Allen |
| // |
| // 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-erlang.js in JavaScript Prettify. |
| * <p/> |
| * All comments are adapted from the JavaScript Prettify. |
| * <p/> |
| * <p/> |
| * <p/> |
| * Derived from https://raw.github.com/erlang/otp/dev/lib/compiler/src/core_parse.yrl |
| * Modified from Mike Samuel's Haskell plugin for google-code-prettify |
| * |
| * @author achew22@gmail.com |
| */ |
| public class LangErlang extends Lang { |
| |
| public LangErlang() { |
| List<List<Object>> _shortcutStylePatterns = new ArrayList<List<Object>>(); |
| List<List<Object>> _fallthroughStylePatterns = new ArrayList<List<Object>>(); |
| |
| // Whitespace |
| // whitechar -> newline | vertab | space | tab | uniWhite |
| // newline -> return linefeed | return | linefeed | formfeed |
| _shortcutStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_PLAIN, Pattern.compile("\\t\\n\\x0B\\x0C\\r ]+"), null, "\t\n" + Character.toString((char) 0x0B) + Character.toString((char) 0x0C) + "\r "})); |
| // Single line double-quoted strings. |
| _shortcutStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_STRING, Pattern.compile("^\\\"(?:[^\\\"\\\\\\n\\x0C\\r]|\\\\[\\s\\S])*(?:\\\"|$)"), null, "\""})); |
| |
| // Handle atoms |
| _shortcutStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_LITERAL, Pattern.compile("^[a-z][a-zA-Z0-9_]*")})); |
| // Handle single quoted atoms |
| _shortcutStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_LITERAL, Pattern.compile("^\\'(?:[^\\'\\\\\\n\\x0C\\r]|\\\\[^&])+\\'?"), null, "'"})); |
| |
| // Handle macros. Just to be extra clear on this one, it detects the ? |
| // then uses the regexp to end it so be very careful about matching |
| // all the terminal elements |
| _shortcutStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_LITERAL, Pattern.compile("^\\?[^ \\t\\n({]+"), null, "?"})); |
| |
| // decimal -> digit{digit} |
| // octal -> octit{octit} |
| // hexadecimal -> hexit{hexit} |
| // integer -> decimal |
| // | 0o octal | 0O octal |
| // | 0x hexadecimal | 0X hexadecimal |
| // float -> decimal . decimal [exponent] |
| // | decimal exponent |
| // exponent -> (e | E) [+ | -] decimal |
| _shortcutStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_LITERAL, Pattern.compile("^(?:0o[0-7]+|0x[\\da-f]+|\\d+(?:\\.\\d+)?(?:e[+\\-]?\\d+)?)", Pattern.CASE_INSENSITIVE), null, "0123456789"})); |
| |
| |
| // TODO: catch @declarations inside comments |
| |
| // Comments in erlang are started with % and go till a newline |
| _fallthroughStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_COMMENT, Pattern.compile("^%[^\\n\\r]*")})); |
| |
| // Catch macros |
| //[PR['PR_TAG'], /?[^( \n)]+/], |
| |
| /** |
| * %% Keywords (atoms are assumed to always be single-quoted). |
| * 'module' 'attributes' 'do' 'let' 'in' 'letrec' |
| * 'apply' 'call' 'primop' |
| * 'case' 'of' 'end' 'when' 'fun' 'try' 'catch' 'receive' 'after' |
| */ |
| _fallthroughStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_KEYWORD, Pattern.compile("^(?:module|attributes|do|let|in|letrec|apply|call|primop|case|of|end|when|fun|try|catch|receive|after|char|integer|float,atom,string,var)\\b")})); |
| |
| /** |
| * Catch definitions (usually defined at the top of the file) |
| * Anything that starts -something |
| */ |
| _fallthroughStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_KEYWORD, Pattern.compile("^-[a-z_]+")})); |
| |
| // Catch variables |
| _fallthroughStylePatterns.add(Arrays.asList(new Object[]{Prettify.PR_TYPE, Pattern.compile("^[A-Z_][a-zA-Z0-9_]*")})); |
| |
| // matches the symbol production |
| _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[]{"erlang", "erl"}); |
| } |
| } |