464 Zeilen
13 KiB
JavaScript
464 Zeilen
13 KiB
JavaScript
// block; "begin", "case", "fun", "if", "receive", "try": closed by "end"
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// block internal; "after", "catch", "of"
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// guard; "when", closed by "->"
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// "->" opens a clause, closed by ";" or "."
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// "<<" opens a binary, closed by ">>"
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// "," appears in arglists, lists, tuples and terminates lines of code
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// "." resets indentation to 0
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// obsolete; "cond", "let", "query"
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CodeMirror.defineMIME("text/x-erlang", "erlang");
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CodeMirror.defineMode("erlang", function(cmCfg, modeCfg) {
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function rval(state,stream,type) {
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// distinguish between "." as terminator and record field operator
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if (type == "record") {
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state.context = "record";
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}else{
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state.context = false;
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}
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// remember last significant bit on last line for indenting
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if (type != "whitespace" && type != "comment") {
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state.lastToken = stream.current();
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}
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// erlang -> CodeMirror tag
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switch (type) {
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case "atom": return "atom";
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case "attribute": return "attribute";
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case "builtin": return "builtin";
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case "comment": return "comment";
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case "fun": return "meta";
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case "function": return "tag";
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case "guard": return "property";
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case "keyword": return "keyword";
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case "macro": return "variable-2";
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case "number": return "number";
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case "operator": return "operator";
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case "record": return "bracket";
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case "string": return "string";
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case "type": return "def";
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case "variable": return "variable";
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case "error": return "error";
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case "separator": return null;
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case "open_paren": return null;
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case "close_paren": return null;
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default: return null;
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}
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}
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var typeWords = [
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"-type", "-spec", "-export_type", "-opaque"];
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var keywordWords = [
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"after","begin","catch","case","cond","end","fun","if",
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"let","of","query","receive","try","when"];
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var separatorWords = [
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"->",";",":",".",","];
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var operatorWords = [
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"and","andalso","band","bnot","bor","bsl","bsr","bxor",
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"div","not","or","orelse","rem","xor"];
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var symbolWords = [
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"+","-","*","/",">",">=","<","=<","=:=","==","=/=","/=","||","<-"];
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var openParenWords = [
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"<<","(","[","{"];
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var closeParenWords = [
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"}","]",")",">>"];
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var guardWords = [
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"is_atom","is_binary","is_bitstring","is_boolean","is_float",
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"is_function","is_integer","is_list","is_number","is_pid",
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"is_port","is_record","is_reference","is_tuple",
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"atom","binary","bitstring","boolean","function","integer","list",
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"number","pid","port","record","reference","tuple"];
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var bifWords = [
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"abs","adler32","adler32_combine","alive","apply","atom_to_binary",
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"atom_to_list","binary_to_atom","binary_to_existing_atom",
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"binary_to_list","binary_to_term","bit_size","bitstring_to_list",
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"byte_size","check_process_code","contact_binary","crc32",
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"crc32_combine","date","decode_packet","delete_module",
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"disconnect_node","element","erase","exit","float","float_to_list",
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"garbage_collect","get","get_keys","group_leader","halt","hd",
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"integer_to_list","internal_bif","iolist_size","iolist_to_binary",
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"is_alive","is_atom","is_binary","is_bitstring","is_boolean",
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"is_float","is_function","is_integer","is_list","is_number","is_pid",
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"is_port","is_process_alive","is_record","is_reference","is_tuple",
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"length","link","list_to_atom","list_to_binary","list_to_bitstring",
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"list_to_existing_atom","list_to_float","list_to_integer",
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"list_to_pid","list_to_tuple","load_module","make_ref","module_loaded",
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"monitor_node","node","node_link","node_unlink","nodes","notalive",
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"now","open_port","pid_to_list","port_close","port_command",
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"port_connect","port_control","pre_loaded","process_flag",
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"process_info","processes","purge_module","put","register",
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"registered","round","self","setelement","size","spawn","spawn_link",
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"spawn_monitor","spawn_opt","split_binary","statistics",
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"term_to_binary","time","throw","tl","trunc","tuple_size",
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"tuple_to_list","unlink","unregister","whereis"];
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// ignored for indenting purposes
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var ignoreWords = [
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",", ":", "catch", "after", "of", "cond", "let", "query"];
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var smallRE = /[a-z_]/;
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var largeRE = /[A-Z_]/;
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var digitRE = /[0-9]/;
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var octitRE = /[0-7]/;
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var anumRE = /[a-z_A-Z0-9]/;
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var symbolRE = /[\+\-\*\/<>=\|:]/;
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var openParenRE = /[<\(\[\{]/;
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var closeParenRE = /[>\)\]\}]/;
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var sepRE = /[\->\.,:;]/;
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function isMember(element,list) {
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return (-1 < list.indexOf(element));
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}
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function isPrev(stream,string) {
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var start = stream.start;
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var len = string.length;
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if (len <= start) {
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var word = stream.string.slice(start-len,start);
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return word == string;
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}else{
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return false;
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}
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}
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function tokenize(stream, state) {
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if (stream.eatSpace()) {
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return rval(state,stream,"whitespace");
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}
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// attributes and type specs
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if ((peekToken(state).token == "" || peekToken(state).token == ".") &&
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stream.peek() == '-') {
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stream.next();
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if (stream.eat(smallRE) && stream.eatWhile(anumRE)) {
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if (isMember(stream.current(),typeWords)) {
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return rval(state,stream,"type");
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}else{
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return rval(state,stream,"attribute");
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}
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}
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stream.backUp(1);
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}
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var ch = stream.next();
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// comment
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if (ch == '%') {
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stream.skipToEnd();
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return rval(state,stream,"comment");
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}
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// macro
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if (ch == '?') {
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stream.eatWhile(anumRE);
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return rval(state,stream,"macro");
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}
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// record
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if ( ch == "#") {
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stream.eatWhile(anumRE);
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return rval(state,stream,"record");
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}
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// char
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if ( ch == "$") {
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if (stream.next() == "\\") {
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if (!stream.eatWhile(octitRE)) {
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stream.next();
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}
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}
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return rval(state,stream,"string");
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}
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// quoted atom
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if (ch == '\'') {
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if (singleQuote(stream)) {
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return rval(state,stream,"atom");
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}else{
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return rval(state,stream,"error");
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}
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}
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// string
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if (ch == '"') {
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if (doubleQuote(stream)) {
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return rval(state,stream,"string");
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}else{
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return rval(state,stream,"error");
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}
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}
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// variable
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if (largeRE.test(ch)) {
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stream.eatWhile(anumRE);
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return rval(state,stream,"variable");
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}
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// atom/keyword/BIF/function
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if (smallRE.test(ch)) {
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stream.eatWhile(anumRE);
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if (stream.peek() == "/") {
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stream.next();
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if (stream.eatWhile(digitRE)) {
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return rval(state,stream,"fun"); // f/0 style fun
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}else{
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stream.backUp(1);
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return rval(state,stream,"atom");
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}
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}
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var w = stream.current();
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if (isMember(w,keywordWords)) {
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pushToken(state,stream);
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return rval(state,stream,"keyword");
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}
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if (stream.peek() == "(") {
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// 'put' and 'erlang:put' are bifs, 'foo:put' is not
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if (isMember(w,bifWords) &&
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(!isPrev(stream,":") || isPrev(stream,"erlang:"))) {
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return rval(state,stream,"builtin");
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}else{
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return rval(state,stream,"function");
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}
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}
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if (isMember(w,guardWords)) {
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return rval(state,stream,"guard");
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}
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if (isMember(w,operatorWords)) {
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return rval(state,stream,"operator");
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}
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if (stream.peek() == ":") {
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if (w == "erlang") {
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return rval(state,stream,"builtin");
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} else {
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return rval(state,stream,"function");
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}
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}
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return rval(state,stream,"atom");
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}
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// number
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if (digitRE.test(ch)) {
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stream.eatWhile(digitRE);
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if (stream.eat('#')) {
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stream.eatWhile(digitRE); // 16#10 style integer
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} else {
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if (stream.eat('.')) { // float
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stream.eatWhile(digitRE);
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}
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if (stream.eat(/[eE]/)) {
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stream.eat(/[-+]/); // float with exponent
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stream.eatWhile(digitRE);
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}
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}
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return rval(state,stream,"number"); // normal integer
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}
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// open parens
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if (nongreedy(stream,openParenRE,openParenWords)) {
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pushToken(state,stream);
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return rval(state,stream,"open_paren");
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}
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// close parens
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if (nongreedy(stream,closeParenRE,closeParenWords)) {
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pushToken(state,stream);
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return rval(state,stream,"close_paren");
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}
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// separators
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if (greedy(stream,sepRE,separatorWords)) {
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// distinguish between "." as terminator and record field operator
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if (state.context == false) {
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pushToken(state,stream);
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}
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return rval(state,stream,"separator");
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}
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// operators
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if (greedy(stream,symbolRE,symbolWords)) {
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return rval(state,stream,"operator");
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}
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return rval(state,stream,null);
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}
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function nongreedy(stream,re,words) {
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if (stream.current().length == 1 && re.test(stream.current())) {
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stream.backUp(1);
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while (re.test(stream.peek())) {
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stream.next();
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if (isMember(stream.current(),words)) {
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return true;
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}
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}
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stream.backUp(stream.current().length-1);
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}
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return false;
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}
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function greedy(stream,re,words) {
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if (stream.current().length == 1 && re.test(stream.current())) {
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while (re.test(stream.peek())) {
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stream.next();
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}
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while (0 < stream.current().length) {
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if (isMember(stream.current(),words)) {
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return true;
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}else{
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stream.backUp(1);
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}
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}
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stream.next();
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}
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return false;
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}
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function doubleQuote(stream) {
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return quote(stream, '"', '\\');
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}
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function singleQuote(stream) {
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return quote(stream,'\'','\\');
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}
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function quote(stream,quoteChar,escapeChar) {
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while (!stream.eol()) {
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var ch = stream.next();
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if (ch == quoteChar) {
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return true;
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}else if (ch == escapeChar) {
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stream.next();
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}
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}
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return false;
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}
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function Token(stream) {
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this.token = stream ? stream.current() : "";
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this.column = stream ? stream.column() : 0;
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this.indent = stream ? stream.indentation() : 0;
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}
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function myIndent(state,textAfter) {
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var indent = cmCfg.indentUnit;
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var outdentWords = ["after","catch"];
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var token = (peekToken(state)).token;
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var wordAfter = takewhile(textAfter,/[^a-z]/);
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if (isMember(token,openParenWords)) {
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return (peekToken(state)).column+token.length;
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}else if (token == "." || token == ""){
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return 0;
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}else if (token == "->") {
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if (wordAfter == "end") {
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return peekToken(state,2).column;
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}else if (peekToken(state,2).token == "fun") {
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return peekToken(state,2).column+indent;
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}else{
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return (peekToken(state)).indent+indent;
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}
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}else if (isMember(wordAfter,outdentWords)) {
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return (peekToken(state)).indent;
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}else{
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return (peekToken(state)).column+indent;
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}
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}
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function takewhile(str,re) {
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var m = str.match(re);
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return m ? str.slice(0,m.index) : str;
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}
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function popToken(state) {
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return state.tokenStack.pop();
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}
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function peekToken(state,depth) {
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var len = state.tokenStack.length;
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var dep = (depth ? depth : 1);
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if (len < dep) {
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return new Token;
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}else{
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return state.tokenStack[len-dep];
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}
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}
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function pushToken(state,stream) {
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var token = stream.current();
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var prev_token = peekToken(state).token;
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if (isMember(token,ignoreWords)) {
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return false;
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}else if (drop_both(prev_token,token)) {
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popToken(state);
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return false;
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}else if (drop_first(prev_token,token)) {
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popToken(state);
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return pushToken(state,stream);
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}else{
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state.tokenStack.push(new Token(stream));
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return true;
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}
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}
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function drop_first(open, close) {
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switch (open+" "+close) {
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case "when ->": return true;
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case "-> end": return true;
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case "-> .": return true;
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case ". .": return true;
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default: return false;
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}
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}
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function drop_both(open, close) {
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switch (open+" "+close) {
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case "( )": return true;
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case "[ ]": return true;
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case "{ }": return true;
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case "<< >>": return true;
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case "begin end": return true;
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case "case end": return true;
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case "fun end": return true;
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case "if end": return true;
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case "receive end": return true;
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case "try end": return true;
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case "-> ;": return true;
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default: return false;
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}
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}
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return {
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startState:
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function() {
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return {tokenStack: [],
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context: false,
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lastToken: null};
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},
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token:
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function(stream, state) {
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return tokenize(stream, state);
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},
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indent:
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function(state, textAfter) {
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// console.log(state.tokenStack);
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return myIndent(state,textAfter);
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}
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};
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});
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