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+/*
+
+ JS Beautifier
+---------------
+ $Date: 2008-04-21 16:13:36 +0300 (Mon, 21 Apr 2008) $
+ $Revision: 53 $
+
+
+ Written by Einars "elfz" Lielmanis, <elfz@laacz.lv>
+ http://elfz.laacz.lv/beautify/
+
+ Originally converted to javascript by Vital, <vital76@gmail.com>
+ http://my.opera.com/Vital/blog/2007/11/21/javascript-beautify-on-javascript-translated
+
+
+ You are free to use this in any way you want, in case you find this useful or working for you.
+
+ Usage:
+ js_beautify(js_source_text);
+
+*/
+
+
+function js_beautify(js_source_text, indent_size, indent_character)
+{
+
+ var input, output, token_text, last_type, last_text, last_word, current_mode, modes, indent_level, indent_string;
+ var whitespace, wordchar, punct, parser_pos, line_starters, in_case;
+ var prefix, token_type;
+
+ function print_newline(ignore_repeated)
+ {
+ ignore_repeated = typeof ignore_repeated === 'undefined' ? true: ignore_repeated;
+
+ // remove trailing whitespace and indent
+ while (output.length && (output[output.length - 1] === ' ' || output[output.length - 1] === indent_string)) {
+ output.pop();
+ }
+
+ if (!output.length) {
+ return; // no newline on start of file
+ }
+
+ if (output[output.length - 1] !== "\n" || !ignore_repeated) {
+ output.push("\n");
+ }
+ for (var i = 0; i < indent_level; i++) {
+ output.push(indent_string);
+ }
+ }
+
+
+
+ function print_space()
+ {
+ var last_output = output.length ? output[output.length - 1] : ' ';
+ if (last_output !== ' ' && last_output !== '\n' && last_output !== indent_string) { // prevent occassional duplicate space
+ output.push(' ');
+ }
+ }
+
+
+ function print_token()
+ {
+ output.push(token_text);
+ }
+
+ function indent()
+ {
+ indent_level++;
+ }
+
+
+ function unindent()
+ {
+ if (indent_level) {
+ indent_level--;
+ }
+ }
+
+
+ function remove_indent()
+ {
+ if (output.length && output[output.length - 1] === indent_string) {
+ output.pop();
+ }
+ }
+
+
+ function set_mode(mode)
+ {
+ modes.push(current_mode);
+ current_mode = mode;
+ }
+
+
+ function restore_mode()
+ {
+ current_mode = modes.pop();
+ }
+
+
+ function in_array(what, arr)
+ {
+ for (var i = 0; i < arr.length; i++)
+ {
+ if (arr[i] === what) {
+ return true;
+ }
+ }
+ return false;
+ }
+
+
+
+ function get_next_token()
+ {
+ var n_newlines = 0;
+ var c = '';
+
+ do {
+ if (parser_pos >= input.length) {
+ return ['', 'TK_EOF'];
+ }
+ c = input.charAt(parser_pos);
+
+ parser_pos += 1;
+ if (c === "\n") {
+ n_newlines += 1;
+ }
+ }
+ while (in_array(c, whitespace));
+
+ if (n_newlines > 1) {
+ for (var i = 0; i < 2; i++) {
+ print_newline(i === 0);
+ }
+ }
+ var wanted_newline = (n_newlines === 1);
+
+
+ if (in_array(c, wordchar)) {
+ if (parser_pos < input.length) {
+ while (in_array(input.charAt(parser_pos), wordchar)) {
+ c += input.charAt(parser_pos);
+ parser_pos += 1;
+ if (parser_pos === input.length) {
+ break;
+ }
+ }
+ }
+
+ // small and surprisingly unugly hack for 1E-10 representation
+ if (parser_pos !== input.length && c.match(/^[0-9]+[Ee]$/) && input.charAt(parser_pos) === '-') {
+ parser_pos += 1;
+
+ var t = get_next_token(parser_pos);
+ c += '-' + t[0];
+ return [c, 'TK_WORD'];
+ }
+
+ if (c === 'in') { // hack for 'in' operator
+ return [c, 'TK_OPERATOR'];
+ }
+ return [c, 'TK_WORD'];
+ }
+
+ if (c === '(' || c === '[') {
+ return [c, 'TK_START_EXPR'];
+ }
+
+ if (c === ')' || c === ']') {
+ return [c, 'TK_END_EXPR'];
+ }
+
+ if (c === '{') {
+ return [c, 'TK_START_BLOCK'];
+ }
+
+ if (c === '}') {
+ return [c, 'TK_END_BLOCK'];
+ }
+
+ if (c === ';') {
+ return [c, 'TK_END_COMMAND'];
+ }
+
+ if (c === '/') {
+ var comment = '';
+ // peek for comment /* ... */
+ if (input.charAt(parser_pos) === '*') {
+ parser_pos += 1;
+ if (parser_pos < input.length) {
+ while (! (input.charAt(parser_pos) === '*' && input.charAt(parser_pos + 1) && input.charAt(parser_pos + 1) === '/') && parser_pos < input.length) {
+ comment += input.charAt(parser_pos);
+ parser_pos += 1;
+ if (parser_pos >= input.length) {
+ break;
+ }
+ }
+ }
+ parser_pos += 2;
+ return ['/*' + comment + '*/', 'TK_BLOCK_COMMENT'];
+ }
+ // peek for comment // ...
+ if (input.charAt(parser_pos) === '/') {
+ comment = c;
+ while (input.charAt(parser_pos) !== "\x0d" && input.charAt(parser_pos) !== "\x0a") {
+ comment += input.charAt(parser_pos);
+ parser_pos += 1;
+ if (parser_pos >= input.length) {
+ break;
+ }
+ }
+ parser_pos += 1;
+ if (wanted_newline) {
+ print_newline();
+ }
+ return [comment, 'TK_COMMENT'];
+ }
+
+ }
+
+ if (c === "'" || // string
+ c === '"' || // string
+ (c === '/' &&
+ ((last_type === 'TK_WORD' && last_text === 'return') || (last_type === 'TK_START_EXPR' || last_type === 'TK_END_BLOCK' || last_type === 'TK_OPERATOR' || last_type === 'TK_EOF' || last_type === 'TK_END_COMMAND')))) { // regexp
+ var sep = c;
+ var esc = false;
+ c = '';
+
+ if (parser_pos < input.length) {
+
+ while (esc || input.charAt(parser_pos) !== sep) {
+ c += input.charAt(parser_pos);
+ if (!esc) {
+ esc = input.charAt(parser_pos) === '\\';
+ } else {
+ esc = false;
+ }
+ parser_pos += 1;
+ if (parser_pos >= input.length) {
+ break;
+ }
+ }
+
+ }
+
+ parser_pos += 1;
+ if (last_type === 'TK_END_COMMAND') {
+ print_newline();
+ }
+ return [sep + c + sep, 'TK_STRING'];
+ }
+
+ if (in_array(c, punct)) {
+ while (parser_pos < input.length && in_array(c + input.charAt(parser_pos), punct)) {
+ c += input.charAt(parser_pos);
+ parser_pos += 1;
+ if (parser_pos >= input.length) {
+ break;
+ }
+ }
+ return [c, 'TK_OPERATOR'];
+ }
+
+ return [c, 'TK_UNKNOWN'];
+ }
+
+
+ //----------------------------------
+
+ indent_character = indent_character || ' ';
+ indent_size = indent_size || 4;
+
+ indent_string = '';
+ while (indent_size--) {
+ indent_string += indent_character;
+ }
+
+ input = js_source_text;
+
+ last_word = ''; // last 'TK_WORD' passed
+ last_type = 'TK_START_EXPR'; // last token type
+ last_text = ''; // last token text
+ output = [];
+
+ whitespace = "\n\r\t ".split('');
+ wordchar = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_$'.split('');
+ punct = '+ - * / % & ++ -- = += -= *= /= %= == === != !== > < >= <= >> << >>> >>>= >>= <<= && &= | || ! !! , : ? ^ ^= |='.split(' ');
+
+ // words which should always start on new line.
+ line_starters = 'continue,try,throw,return,var,if,switch,case,default,for,while,break,function'.split(',');
+
+ // states showing if we are currently in expression (i.e. "if" case) - 'EXPRESSION', or in usual block (like, procedure), 'BLOCK'.
+ // some formatting depends on that.
+ current_mode = 'BLOCK';
+ modes = [current_mode];
+
+ indent_level = 0;
+ parser_pos = 0; // parser position
+ in_case = false; // flag for parser that case/default has been processed, and next colon needs special attention
+ while (true) {
+ var t = get_next_token(parser_pos);
+ token_text = t[0];
+ token_type = t[1];
+ if (token_type === 'TK_EOF') {
+ break;
+ }
+
+ switch (token_type) {
+
+ case 'TK_START_EXPR':
+
+ set_mode('EXPRESSION');
+ if (last_type === 'TK_END_EXPR' || last_type === 'TK_START_EXPR') {
+ // do nothing on (( and )( and ][ and ]( ..
+ } else if (last_type !== 'TK_WORD' && last_type !== 'TK_OPERATOR') {
+ print_space();
+ } else if (in_array(last_word, line_starters) && last_word !== 'function') {
+ print_space();
+ }
+ print_token();
+ break;
+
+ case 'TK_END_EXPR':
+
+ print_token();
+ restore_mode();
+ break;
+
+ case 'TK_START_BLOCK':
+
+ set_mode('BLOCK');
+ if (last_type !== 'TK_OPERATOR' && last_type !== 'TK_START_EXPR') {
+ if (last_type === 'TK_START_BLOCK') {
+ print_newline();
+ } else {
+ print_space();
+ }
+ }
+ print_token();
+ indent();
+ break;
+
+ case 'TK_END_BLOCK':
+ if (last_type === 'TK_START_BLOCK') {
+ // nothing
+ unindent();
+ } else {
+ unindent();
+ print_newline();
+ }
+ print_token();
+ restore_mode();
+ break;
+
+ case 'TK_WORD':
+
+ if (token_text === 'case' || token_text === 'default') {
+ if (last_text === ':') {
+ // switch cases following one another
+ remove_indent();
+ } else {
+ // case statement starts in the same line where switch
+ unindent();
+ print_newline();
+ indent();
+ }
+ print_token();
+ in_case = true;
+ break;
+ }
+
+ prefix = 'NONE';
+ if (last_type === 'TK_END_BLOCK') {
+ if (!in_array(token_text.toLowerCase(), ['else', 'catch', 'finally'])) {
+ prefix = 'NEWLINE';
+ } else {
+ prefix = 'SPACE';
+ print_space();
+ }
+ } else if (last_type === 'TK_END_COMMAND' && current_mode === 'BLOCK') {
+ prefix = 'NEWLINE';
+ } else if (last_type === 'TK_END_COMMAND' && current_mode === 'EXPRESSION') {
+ prefix = 'SPACE';
+ } else if (last_type === 'TK_WORD') {
+ prefix = 'SPACE';
+ } else if (last_type === 'TK_START_BLOCK') {
+ prefix = 'NEWLINE';
+ } else if (last_type === 'TK_END_EXPR') {
+ print_space();
+ prefix = 'NEWLINE';
+ }
+
+ if (in_array(token_text, line_starters) || prefix === 'NEWLINE') {
+
+ if (last_text === 'else') {
+ // no need to force newline on else break
+ print_space();
+ } else if ((last_type === 'TK_START_EXPR' || last_text === '=') && token_text === 'function') {
+ // no need to force newline on 'function': (function
+ // DONOTHING
+ } else if (last_type === 'TK_WORD' && (last_text === 'return' || last_text === 'throw')) {
+ // no newline between 'return nnn'
+ print_space();
+ } else if (last_type !== 'TK_END_EXPR') {
+ if ((last_type !== 'TK_START_EXPR' || token_text !== 'var') && last_text !== ':') {
+ // no need to force newline on 'var': for (var x = 0...)
+ if (token_text === 'if' && last_type === 'TK_WORD' && last_word === 'else') {
+ // no newline for } else if {
+ print_space();
+ } else {
+ print_newline();
+ }
+ }
+ }
+ } else if (prefix === 'SPACE') {
+ print_space();
+ }
+ print_token();
+ last_word = token_text;
+ break;
+
+ case 'TK_END_COMMAND':
+
+ print_token();
+ break;
+
+ case 'TK_STRING':
+
+ if (last_type === 'TK_START_BLOCK' || last_type === 'TK_END_BLOCK') {
+ print_newline();
+ } else if (last_type === 'TK_WORD') {
+ print_space();
+ }
+ print_token();
+ break;
+
+ case 'TK_OPERATOR':
+
+ var start_delim = true;
+ var end_delim = true;
+
+ if (token_text === ':' && in_case) {
+ print_token(); // colon really asks for separate treatment
+ print_newline();
+ break;
+ }
+
+ in_case = false;
+
+ if (token_text === ',') {
+ if (last_type === 'TK_END_BLOCK') {
+ print_token();
+ print_newline();
+ } else {
+ if (current_mode === 'BLOCK') {
+ print_token();
+ print_newline();
+ } else {
+ print_token();
+ print_space();
+ }
+ }
+ break;
+ } else if (token_text === '--' || token_text === '++') { // unary operators special case
+ if (last_text === ';') {
+ // space for (;; ++i)
+ start_delim = true;
+ end_delim = false;
+ } else {
+ start_delim = false;
+ end_delim = false;
+ }
+ } else if (token_text === '!' && last_type === 'TK_START_EXPR') {
+ // special case handling: if (!a)
+ start_delim = false;
+ end_delim = false;
+ } else if (last_type === 'TK_OPERATOR') {
+ start_delim = false;
+ end_delim = false;
+ } else if (last_type === 'TK_END_EXPR') {
+ start_delim = true;
+ end_delim = true;
+ } else if (token_text === '.') {
+ // decimal digits or object.property
+ start_delim = false;
+ end_delim = false;
+
+ } else if (token_text === ':') {
+ // zz: xx
+ // can't differentiate ternary op, so for now it's a ? b: c; without space before colon
+ start_delim = false;
+ }
+ if (start_delim) {
+ print_space();
+ }
+
+ print_token();
+
+ if (end_delim) {
+ print_space();
+ }
+ break;
+
+ case 'TK_BLOCK_COMMENT':
+
+ print_newline();
+ print_token();
+ print_newline();
+ break;
+
+ case 'TK_COMMENT':
+
+ // print_newline();
+ print_space();
+ print_token();
+ print_newline();
+ break;
+
+ case 'TK_UNKNOWN':
+ print_token();
+ break;
+ }
+
+ last_type = token_type;
+ last_text = token_text;
+ }
+
+ return output.join('');
+
+}