+//<script type="text/javascript">
+
+
+const XObject = imports.XObject.XObject;
+const console = imports.console.console;
+
+
+const Token = imports.Token.Token;
+const Lang = imports.Lang.Lang;
+
+/**
+ @class Search a {@link JSDOC.TextStream} for language tokens.
+*/
+const TokenReader = XObject.define(
+ function(o) {
+
+ XObject.extend(this, o || {});
+
+ },
+ Object,
+ {
+ /** @cfg {Boolean} collapseWhite merge multiple whitespace/comments into a single token **/
+ collapseWhite : false, // only reduces white space...
+ /** @cfg {Boolean} keepDocs keep JSDOC comments **/
+ keepDocs : true,
+ /** @cfg {Boolean} keepWhite keep White space **/
+ keepWhite : false,
+ /** @cfg {Boolean} keepComments keep all comments **/
+ keepComments : false,
+ /** @cfg {Boolean} sepIdents seperate identifiers (eg. a.b.c into ['a', '.', 'b', '.', 'c'] ) **/
+ sepIdents : false,
+ /** @cfg {String} filename name of file being parsed. **/
+ filename : '',
+ /** @config {Boolean} ignoreBadGrammer do not throw errors if we find stuff that might break compression **/
+ ignoreBadGrammer : false,
+ /**
+ * tokenize a stream
+ * @return {Array} of tokens
+ *
+ * ts = new TextStream(File.read(str));
+ * tr = TokenReader({ keepComments : true, keepWhite : true });
+ * tr.tokenize(ts)
+ *
+ */
+ tokenize : function(/**JSDOC.TextStream*/stream) {
+ this.line =1;
+ var tokens = [];
+ /**@ignore*/
+ tokens.last = function() { return tokens[tokens.length-1]; }
+ /**@ignore*/
+ tokens.lastSym = function() {
+ for (var i = tokens.length-1; i >= 0; i--) {
+ if (!(tokens[i].is("WHIT") || tokens[i].is("COMM"))) return tokens[i];
+ }
+ return true;
+ }
+
+ while (!stream.look().eof) {
+ if (this.read_mlcomment(stream, tokens)) continue;
+ if (this.read_slcomment(stream, tokens)) continue;
+ if (this.read_dbquote(stream, tokens)) continue;
+ if (this.read_snquote(stream, tokens)) continue;
+ if (this.read_regx(stream, tokens)) continue;
+ if (this.read_numb(stream, tokens)) continue;
+ if (this.read_punc(stream, tokens)) continue;
+ if (this.read_newline(stream, tokens)) continue;
+ if (this.read_space(stream, tokens)) continue;
+ if (this.read_word(stream, tokens)) continue;
+
+ // if execution reaches here then an error has happened
+ tokens.push(new Token(stream.next(), "TOKN", "UNKNOWN_TOKEN", this.line));
+ }
+
+
+
+ return tokens;
+ },
+
+ /**
+ * findPuncToken - find the id of a token (previous to current)
+ * need to back check syntax..
+ *
+ * @arg {Array} tokens the array of tokens.
+ * @arg {String} token data (eg. '(')
+ * @arg {Number} offset where to start reading from
+ * @return {Number} position of token
+ */
+ findPuncToken : function(tokens, data, n) {
+ n = n || tokens.length -1;
+ var stack = 0;
+ while (n > -1) {
+
+ if (!stack && tokens[n].data == data) {
+ return n;
+ }
+
+ if (tokens[n].data == ')' || tokens[n].data == '}') {
+ stack++;
+ n--;
+ continue;
+ }
+ if (stack && (tokens[n].data == '{' || tokens[n].data == '(')) {
+ stack--;
+ n--;
+ continue;
+ }
+
+
+ n--;
+ }
+ return -1;
+ },
+ /**
+ * lastSym - find the last token symbol
+ * need to back check syntax..
+ *
+ * @arg {Array} tokens the array of tokens.
+ * @arg {Number} offset where to start..
+ * @return {Token} the token
+ */
+ lastSym : function(tokens, n) {
+ for (var i = n-1; i >= 0; i--) {
+ if (!(tokens[i].is("WHIT") || tokens[i].is("COMM"))) return tokens[i];
+ }
+ return null;
+ },
+
+
+
+ /**
+ @returns {Boolean} Was the token found?
+ */
+ read_word : function(/**JSDOC.TokenStream*/stream, tokens) {
+ var found = "";
+ while (!stream.look().eof && Lang.isWordChar(stream.look())) {
+ found += stream.next();
+ }
+
+ if (found === "") {
+ return false;
+ }
+
+ var name;
+ if ((name = Lang.keyword(found))) {
+ if (found == 'return' && tokens.lastSym().data == ')') {
+ //Seed.print('@' + tokens.length);
+ var n = this.findPuncToken(tokens, ')');
+ //Seed.print(')@' + n);
+ n = this.findPuncToken(tokens, '(', n-1);
+ //Seed.print('(@' + n);
+
+ var lt = this.lastSym(tokens, n);
+ print(JSON.stringify(lt));
+ if (lt.type != 'KEYW' || ['IF', 'WHILE'].indexOf(lt.name) < -1) {
+ if (!this.ignoreBadGrammer) {
+ throw {
+ name : "ArgumentError",
+ message: "\n" + this.filename + ':' + this.line + " Error - return found after )"
+ }
+ }
+ }
+
+
+
+ }
+
+ tokens.push(new Token(found, "KEYW", name, this.line));
+ return true;
+ }
+ if (!this.sepIdents || found.indexOf('.') < 0 ) {
+ tokens.push(new Token(found, "NAME", "NAME", this.line));
+ return true;
+ }
+ var n = found.split('.');
+ var p = false;
+ var _this = this;
+ n.forEach(function(nm) {
+ if (p) {
+ tokens.push(new Token('.', "PUNC", "DOT", _this.line));
+ }
+ p=true;
+ tokens.push(new Token(nm, "NAME", "NAME", _this.line));
+ });
+ return true;
+
+
+ },
+
+ /**
+ @returns {Boolean} Was the token found?
+ */
+ read_punc : function(/**JSDOC.TokenStream*/stream, tokens) {
+ var found = "";
+ var name;
+ while (!stream.look().eof && Lang.punc(found+stream.look())) {
+ found += stream.next();
+ }
+
+
+ if (found === "") {
+ return false;
+ }
+
+ if ((found == '}' || found == ']') && tokens.lastSym().data == ',') {
+ //print("Error - comma found before " + found);
+ //print(JSON.stringify(tokens.lastSym(), null,4));
+ if (this.ignoreBadGrammer) {
+ print("\n" + this.filename + ':' + this.line + " Error - comma found before " + found);
+ } else {
+
+ throw {
+ name : "ArgumentError",
+ message: "\n" + this.filename + ':' + this.line + " Error - comma found before " + found
+ }
+ }
+ }
+
+ tokens.push(new Token(found, "PUNC", Lang.punc(found), this.line));
+ return true;
+
+ },
+
+ /**
+ @returns {Boolean} Was the token found?
+ */
+ read_space : function(/**JSDOC.TokenStream*/stream, tokens) {
+ var found = "";
+
+ while (!stream.look().eof && Lang.isSpace(stream.look()) && !Lang.isNewline(stream.look())) {
+ found += stream.next();
+ }
+
+ if (found === "") {
+ return false;
+ }
+ //print("WHITE = " + JSON.stringify(found));
+ if (this.collapseWhite) found = " ";
+ if (this.keepWhite) tokens.push(new Token(found, "WHIT", "SPACE", this.line));
+ return true;
+
+ },
+
+ /**
+ @returns {Boolean} Was the token found?
+ */
+ read_newline : function(/**JSDOC.TokenStream*/stream, tokens) {
+ var found = "";
+ var line = this.line;
+ while (!stream.look().eof && Lang.isNewline(stream.look())) {
+ this.line++;
+ found += stream.next();
+ }
+
+ if (found === "") {
+ return false;
+ }
+ //this.line++;
+ if (this.collapseWhite) {
+ found = "\n";
+ }
+ if (this.keepWhite) {
+ var last = tokens ? tokens.pop() : false;
+ if (last && last.name != "WHIT") {
+ tokens.push(last);
+ }
+
+ tokens.push(new Token(found, "WHIT", "NEWLINE", line));
+ }
+ return true;
+ },
+
+ /**
+ @returns {Boolean} Was the token found?
+ */
+ read_mlcomment : function(/**JSDOC.TokenStream*/stream, tokens) {
+ if (stream.look() == "/" && stream.look(1) == "*") {
+ var found = stream.next(2);
+ var c = '';
+ var line = this.line;
+ while (!stream.look().eof && !(stream.look(-1) == "/" && stream.look(-2) == "*")) {
+ c = stream.next();
+ if (c == "\n") this.line++;
+ found += c;
+ }
+
+ // to start doclet we allow /** or /*** but not /**/ or /****
+ if (/^\/\*\*([^\/]|\*[^*])/.test(found) && this.keepDocs) tokens.push(new Token(found, "COMM", "JSDOC", this.line));
+ else if (this.keepComments) tokens.push(new Token(found, "COMM", "MULTI_LINE_COMM", line));
+ return true;
+ }
+ return false;
+ },
+
+ /**
+ @returns {Boolean} Was the token found?
+ */
+ read_slcomment : function(/**JSDOC.TokenStream*/stream, tokens) {
+ var found;
+ if (
+ (stream.look() == "/" && stream.look(1) == "/" && (found=stream.next(2)))
+ ||
+ (stream.look() == "<" && stream.look(1) == "!" && stream.look(2) == "-" && stream.look(3) == "-" && (found=stream.next(4)))
+ ) {
+ var line = this.line;
+ while (!stream.look().eof && !Lang.isNewline(stream.look())) {
+ found += stream.next();
+ }
+ if (!stream.look().eof) {
+ found += stream.next();
+ }
+ if (this.keepComments) {
+ tokens.push(new Token(found, "COMM", "SINGLE_LINE_COMM", line));
+ }
+ this.line++;
+ return true;
+ }
+ return false;
+ },
+
+ /**
+ @returns {Boolean} Was the token found?
+ */
+ read_dbquote : function(/**JSDOC.TokenStream*/stream, tokens) {
+ if (stream.look() == "\"") {
+ // find terminator
+ var string = stream.next();
+
+ while (!stream.look().eof) {
+ if (stream.look() == "\\") {
+ if (Lang.isNewline(stream.look(1))) {
+ do {
+ stream.next();
+ } while (!stream.look().eof && Lang.isNewline(stream.look()));
+ string += "\\\n";
+ }
+ else {
+ string += stream.next(2);
+ }
+ }
+ else if (stream.look() == "\"") {
+ string += stream.next();
+ tokens.push(new Token(string, "STRN", "DOUBLE_QUOTE", this.line));
+ return true;
+ }
+ else {
+ string += stream.next();
+ }
+ }
+ }
+ return false; // error! unterminated string
+ },
+
+ /**
+ @returns {Boolean} Was the token found?
+ */
+ read_snquote : function(/**JSDOC.TokenStream*/stream, tokens) {
+ if (stream.look() == "'") {
+ // find terminator
+ var string = stream.next();
+
+ while (!stream.look().eof) {
+ if (stream.look() == "\\") { // escape sequence
+ string += stream.next(2);
+ }
+ else if (stream.look() == "'") {
+ string += stream.next();
+ tokens.push(new Token(string, "STRN", "SINGLE_QUOTE", this.line));
+ return true;
+ }
+ else {
+ string += stream.next();
+ }
+ }
+ }
+ return false; // error! unterminated string
+ },
+
+ /**
+ @returns {Boolean} Was the token found?
+ */
+ read_numb : function(/**JSDOC.TokenStream*/stream, tokens) {
+ if (stream.look() === "0" && stream.look(1) == "x") {
+ return this.read_hex(stream, tokens);
+ }
+
+ var found = "";
+
+ while (!stream.look().eof && Lang.isNumber(found+stream.look())){
+ found += stream.next();
+ }
+
+ if (found === "") {
+ return false;
+ }
+ else {
+ if (/^0[0-7]/.test(found)) tokens.push(new Token(found, "NUMB", "OCTAL", this.line));
+ else tokens.push(new Token(found, "NUMB", "DECIMAL", this.line));
+ return true;
+ }
+ },
+ /*t:
+ requires("../lib/JSDOC/TextStream.js");
+ requires("../lib/JSDOC/Token.js");
+ requires("../lib/JSDOC/Lang.js");
+
+ plan(3, "testing read_numb");
+
+ //// setup
+ var src = "function foo(num){while (num+8.0 >= 0x20 && num < 0777){}}";
+ var tr = new TokenReader();
+ var tokens = tr.tokenize(new TextStream(src));
+
+ var hexToken, octToken, decToken;
+ for (var i = 0; i < tokens.length; i++) {
+ if (tokens[i].name == "HEX_DEC") hexToken = tokens[i];
+ if (tokens[i].name == "OCTAL") octToken = tokens[i];
+ if (tokens[i].name == "DECIMAL") decToken = tokens[i];
+ }
+ ////
+
+ is(decToken.data, "8.0", "decimal number is found in source.");
+ is(hexToken.data, "0x20", "hexdec number is found in source (issue #99).");
+ is(octToken.data, "0777", "octal number is found in source.");
+ */
+
+ /**
+ @returns {Boolean} Was the token found?
+ */
+ read_hex : function(/**JSDOC.TokenStream*/stream, tokens) {
+ var found = stream.next(2);
+
+ while (!stream.look().eof) {
+ if (Lang.isHexDec(found) && !Lang.isHexDec(found+stream.look())) { // done
+ tokens.push(new Token(found, "NUMB", "HEX_DEC", this.line));
+ return true;
+ }
+ else {
+ found += stream.next();
+ }
+ }
+ return false;
+ },
+
+ /**
+ @returns {Boolean} Was the token found?
+ */
+ read_regx : function(/**JSDOC.TokenStream*/stream, tokens) {
+ var last;
+ if (
+ stream.look() == "/"
+ &&
+ (
+
+ (
+ !(last = tokens.lastSym()) // there is no last, the regex is the first symbol
+ ||
+ (
+ !last.is("NUMB")
+ && !last.is("NAME")
+ && !last.is("RIGHT_PAREN")
+ && !last.is("RIGHT_BRACKET")
+ )
+ )
+ )
+ ) {
+ var regex = stream.next();
+
+ while (!stream.look().eof) {
+ if (stream.look() == "\\") { // escape sequence
+ regex += stream.next(2);
+ }
+ else if (stream.look() == "/") {
+ regex += stream.next();
+
+ while (/[gmi]/.test(stream.look())) {
+ regex += stream.next();
+ }
+
+ tokens.push(new Token(regex, "REGX", "REGX", this.line));
+ return true;
+ }
+ else {
+ regex += stream.next();
+ }
+ }
+ // error: unterminated regex
+ }
+ return false;
+ }
+});
\ No newline at end of file