From: Alan Knowles <alan@roojs.com>
Date: Thu, 10 Sep 2015 09:54:33 +0000 (+0800)
Subject: JSDOC/TokenReader.vala
X-Git-Url: http://git.roojs.org/?p=gnome.introspection-doc-generator;a=commitdiff_plain;h=c665397f1bd7b49118b10e99642f832d5c79dc68

JSDOC/TokenReader.vala
---

diff --git a/JSDOC/TokenReader.vala b/JSDOC/TokenReader.vala
index e69de29..9fe4fe7 100644
--- a/JSDOC/TokenReader.vala
+++ b/JSDOC/TokenReader.vala
@@ -0,0 +1,490 @@
+//<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