333 lines
8.3 KiB
JavaScript
333 lines
8.3 KiB
JavaScript
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if (typeof JSDOC == "undefined") JSDOC = {};
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/**
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@class Search a {@link JSDOC.TextStream} for language tokens.
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*/
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JSDOC.TokenReader = function() {
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this.keepDocs = true;
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this.keepWhite = false;
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this.keepComments = false;
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}
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/**
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@type {JSDOC.Token[]}
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*/
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JSDOC.TokenReader.prototype.tokenize = function(/**JSDOC.TextStream*/stream) {
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var tokens = [];
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/**@ignore*/ tokens.last = function() { return tokens[tokens.length-1]; }
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/**@ignore*/ tokens.lastSym = function() {
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for (var i = tokens.length-1; i >= 0; i--) {
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if (!(tokens[i].is("WHIT") || tokens[i].is("COMM"))) return tokens[i];
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}
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}
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while (!stream.look().eof) {
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if (this.read_mlcomment(stream, tokens)) continue;
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if (this.read_slcomment(stream, tokens)) continue;
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if (this.read_dbquote(stream, tokens)) continue;
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if (this.read_snquote(stream, tokens)) continue;
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if (this.read_regx(stream, tokens)) continue;
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if (this.read_numb(stream, tokens)) continue;
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if (this.read_punc(stream, tokens)) continue;
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if (this.read_newline(stream, tokens)) continue;
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if (this.read_space(stream, tokens)) continue;
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if (this.read_word(stream, tokens)) continue;
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// if execution reaches here then an error has happened
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tokens.push(new JSDOC.Token(stream.next(), "TOKN", "UNKNOWN_TOKEN"));
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}
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return tokens;
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}
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/**
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@returns {Boolean} Was the token found?
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*/
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JSDOC.TokenReader.prototype.read_word = function(/**JSDOC.TokenStream*/stream, tokens) {
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var found = "";
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while (!stream.look().eof && JSDOC.Lang.isWordChar(stream.look())) {
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found += stream.next();
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}
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if (found === "") {
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return false;
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}
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else {
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var name;
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if ((name = JSDOC.Lang.keyword(found))) tokens.push(new JSDOC.Token(found, "KEYW", name));
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else tokens.push(new JSDOC.Token(found, "NAME", "NAME"));
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return true;
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}
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}
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/**
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@returns {Boolean} Was the token found?
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*/
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JSDOC.TokenReader.prototype.read_punc = function(/**JSDOC.TokenStream*/stream, tokens) {
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var found = "";
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var name;
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while (!stream.look().eof && JSDOC.Lang.punc(found+stream.look())) {
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found += stream.next();
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}
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if (found === "") {
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return false;
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}
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else {
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tokens.push(new JSDOC.Token(found, "PUNC", JSDOC.Lang.punc(found)));
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return true;
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}
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}
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/**
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@returns {Boolean} Was the token found?
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*/
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JSDOC.TokenReader.prototype.read_space = function(/**JSDOC.TokenStream*/stream, tokens) {
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var found = "";
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while (!stream.look().eof && JSDOC.Lang.isSpace(stream.look())) {
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found += stream.next();
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}
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if (found === "") {
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return false;
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}
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else {
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if (this.collapseWhite) found = " ";
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if (this.keepWhite) tokens.push(new JSDOC.Token(found, "WHIT", "SPACE"));
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return true;
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}
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}
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/**
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@returns {Boolean} Was the token found?
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*/
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JSDOC.TokenReader.prototype.read_newline = function(/**JSDOC.TokenStream*/stream, tokens) {
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var found = "";
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while (!stream.look().eof && JSDOC.Lang.isNewline(stream.look())) {
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found += stream.next();
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}
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if (found === "") {
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return false;
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}
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else {
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if (this.collapseWhite) found = "\n";
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if (this.keepWhite) tokens.push(new JSDOC.Token(found, "WHIT", "NEWLINE"));
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return true;
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}
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}
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/**
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@returns {Boolean} Was the token found?
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*/
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JSDOC.TokenReader.prototype.read_mlcomment = function(/**JSDOC.TokenStream*/stream, tokens) {
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if (stream.look() == "/" && stream.look(1) == "*") {
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var found = stream.next(2);
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while (!stream.look().eof && !(stream.look(-1) == "/" && stream.look(-2) == "*")) {
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found += stream.next();
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}
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// to start doclet we allow /** or /*** but not /**/ or /****
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if (/^\/\*\*([^\/]|\*[^*])/.test(found) && this.keepDocs) tokens.push(new JSDOC.Token(found, "COMM", "JSDOC"));
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else if (this.keepComments) tokens.push(new JSDOC.Token(found, "COMM", "MULTI_LINE_COMM"));
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return true;
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}
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return false;
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}
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/**
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@returns {Boolean} Was the token found?
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*/
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JSDOC.TokenReader.prototype.read_slcomment = function(/**JSDOC.TokenStream*/stream, tokens) {
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var found;
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if (
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(stream.look() == "/" && stream.look(1) == "/" && (found=stream.next(2)))
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(stream.look() == "<" && stream.look(1) == "!" && stream.look(2) == "-" && stream.look(3) == "-" && (found=stream.next(4)))
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) {
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while (!stream.look().eof && !JSDOC.Lang.isNewline(stream.look())) {
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found += stream.next();
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}
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if (this.keepComments) {
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tokens.push(new JSDOC.Token(found, "COMM", "SINGLE_LINE_COMM"));
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}
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return true;
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}
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return false;
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}
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/**
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@returns {Boolean} Was the token found?
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*/
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JSDOC.TokenReader.prototype.read_dbquote = function(/**JSDOC.TokenStream*/stream, tokens) {
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if (stream.look() == "\"") {
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// find terminator
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var string = stream.next();
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while (!stream.look().eof) {
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if (stream.look() == "\\") {
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if (JSDOC.Lang.isNewline(stream.look(1))) {
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do {
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stream.next();
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} while (!stream.look().eof && JSDOC.Lang.isNewline(stream.look()));
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string += "\\\n";
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}
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else {
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string += stream.next(2);
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}
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}
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else if (stream.look() == "\"") {
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string += stream.next();
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tokens.push(new JSDOC.Token(string, "STRN", "DOUBLE_QUOTE"));
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return true;
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}
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else {
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string += stream.next();
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}
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}
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}
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return false; // error! unterminated string
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}
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/**
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@returns {Boolean} Was the token found?
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*/
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JSDOC.TokenReader.prototype.read_snquote = function(/**JSDOC.TokenStream*/stream, tokens) {
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if (stream.look() == "'") {
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// find terminator
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var string = stream.next();
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while (!stream.look().eof) {
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if (stream.look() == "\\") { // escape sequence
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string += stream.next(2);
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}
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else if (stream.look() == "'") {
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string += stream.next();
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tokens.push(new JSDOC.Token(string, "STRN", "SINGLE_QUOTE"));
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return true;
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}
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else {
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string += stream.next();
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}
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}
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}
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return false; // error! unterminated string
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}
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/**
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@returns {Boolean} Was the token found?
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*/
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JSDOC.TokenReader.prototype.read_numb = function(/**JSDOC.TokenStream*/stream, tokens) {
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if (stream.look() === "0" && stream.look(1) == "x") {
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return this.read_hex(stream, tokens);
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}
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var found = "";
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while (!stream.look().eof && JSDOC.Lang.isNumber(found+stream.look())){
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found += stream.next();
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}
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if (found === "") {
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return false;
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}
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else {
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if (/^0[0-7]/.test(found)) tokens.push(new JSDOC.Token(found, "NUMB", "OCTAL"));
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else tokens.push(new JSDOC.Token(found, "NUMB", "DECIMAL"));
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return true;
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}
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}
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/*t:
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requires("../lib/JSDOC/TextStream.js");
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requires("../lib/JSDOC/Token.js");
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requires("../lib/JSDOC/Lang.js");
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plan(3, "testing JSDOC.TokenReader.prototype.read_numb");
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//// setup
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var src = "function foo(num){while (num+8.0 >= 0x20 && num < 0777){}}";
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var tr = new JSDOC.TokenReader();
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var tokens = tr.tokenize(new JSDOC.TextStream(src));
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var hexToken, octToken, decToken;
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for (var i = 0; i < tokens.length; i++) {
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if (tokens[i].name == "HEX_DEC") hexToken = tokens[i];
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if (tokens[i].name == "OCTAL") octToken = tokens[i];
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if (tokens[i].name == "DECIMAL") decToken = tokens[i];
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}
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////
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is(decToken.data, "8.0", "decimal number is found in source.");
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is(hexToken.data, "0x20", "hexdec number is found in source (issue #99).");
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is(octToken.data, "0777", "octal number is found in source.");
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*/
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/**
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@returns {Boolean} Was the token found?
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*/
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JSDOC.TokenReader.prototype.read_hex = function(/**JSDOC.TokenStream*/stream, tokens) {
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var found = stream.next(2);
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while (!stream.look().eof) {
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if (JSDOC.Lang.isHexDec(found) && !JSDOC.Lang.isHexDec(found+stream.look())) { // done
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tokens.push(new JSDOC.Token(found, "NUMB", "HEX_DEC"));
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return true;
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}
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else {
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found += stream.next();
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}
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}
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return false;
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}
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/**
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@returns {Boolean} Was the token found?
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*/
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JSDOC.TokenReader.prototype.read_regx = function(/**JSDOC.TokenStream*/stream, tokens) {
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var last;
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if (
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stream.look() == "/"
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&&
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(
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(
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!(last = tokens.lastSym()) // there is no last, the regex is the first symbol
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(
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!last.is("NUMB")
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&& !last.is("NAME")
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&& !last.is("RIGHT_PAREN")
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&& !last.is("RIGHT_BRACKET")
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)
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)
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)
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) {
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var regex = stream.next();
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while (!stream.look().eof) {
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if (stream.look() == "\\") { // escape sequence
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regex += stream.next(2);
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}
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else if (stream.look() == "/") {
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regex += stream.next();
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while (/[gmi]/.test(stream.look())) {
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regex += stream.next();
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}
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tokens.push(new JSDOC.Token(regex, "REGX", "REGX"));
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return true;
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}
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else {
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regex += stream.next();
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}
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}
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// error: unterminated regex
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}
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return false;
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}
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