function js_beautify(js_source_text,indent_size,indent_character,indent_level)
{var input,output,token_text,last_type,last_text,last_word,current_mode,modes,indent_string;var whitespace,wordchar,punct,parser_pos,line_starters,in_case;var prefix,token_type,do_block_just_closed,var_line,var_line_tainted;function trim_output()
{while(output.length&&(output[output.length-1]===' '||output[output.length-1]===indent_string)){output.pop();}}
function print_newline(ignore_repeated)
{ignore_repeated=typeof ignore_repeated==='undefined'?true:ignore_repeated;trim_output();if(!output.length){return;}
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){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()
{do_block_just_closed=current_mode==='DO_BLOCK';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;}}}
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'){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='';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'];}
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==="'"||c==='"'||(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')))){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_type='TK_START_EXPR';last_text='';output=[];do_block_just_closed=false;var_line=false;var_line_tainted=false;whitespace="\n\r\t ".split('');wordchar='abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_$'.split('');punct='+ - * / % & ++ -- = += -= *= /= %= == === != !== > < >= <= >> << >>> >>>= >>= <<= && &= | || ! !! , : ? ^ ^= |='.split(' ');line_starters='continue,try,throw,return,var,if,switch,case,default,for,while,break,function'.split(',');current_mode='BLOCK';modes=[current_mode];indent_level=indent_level||0;parser_pos=0;in_case=false;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':var_line=false;set_mode('EXPRESSION');if(last_type==='TK_END_EXPR'||last_type==='TK_START_EXPR'){}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':if(last_word==='do'){set_mode('DO_BLOCK');}else{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'){trim_output();unindent();}else{unindent();print_newline();}
print_token();restore_mode();break;case'TK_WORD':if(do_block_just_closed){print_space();print_token();print_space();break;}
if(token_text==='case'||token_text==='default'){if(last_text===':'){remove_indent();}else{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'||current_mode==='DO_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(last_type!=='TK_END_BLOCK'&&in_array(token_text.toLowerCase(),['else','catch','finally'])){print_newline();}else if(in_array(token_text,line_starters)||prefix==='NEWLINE'){if(last_text==='else'){print_space();}else if((last_type==='TK_START_EXPR'||last_text==='=')&&token_text==='function'){}else if(last_type==='TK_WORD'&&(last_text==='return'||last_text==='throw')){print_space();}else if(last_type!=='TK_END_EXPR'){if((last_type!=='TK_START_EXPR'||token_text!=='var')&&last_text!==':'){if(token_text==='if'&&last_type==='TK_WORD'&&last_word==='else'){print_space();}else{print_newline();}}}else{if(in_array(token_text,line_starters)&&last_text!==')'){print_newline();}}}else if(prefix==='SPACE'){print_space();}
print_token();last_word=token_text;if(token_text==='var'){var_line=true;var_line_tainted=false;}
break;case'TK_END_COMMAND':print_token();var_line=false;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(var_line&&token_text!==','){var_line_tainted=true;if(token_text===':'){var_line=false;}}
if(token_text===':'&&in_case){print_token();print_newline();break;}
in_case=false;if(token_text===','){if(var_line){if(var_line_tainted){print_token();print_newline();var_line_tainted=false;}else{print_token();print_space();}}else 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==='++'){if(last_text===';'){start_delim=true;end_delim=false;}else{start_delim=false;end_delim=false;}}else if(token_text==='!'&&last_type==='TK_START_EXPR'){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==='.'){start_delim=false;end_delim=false;}else if(token_text===':'){if(last_text.match(/^\d+$/)){start_delim=true;}else{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_space();print_token();print_newline();break;case'TK_UNKNOWN':print_token();break;}
last_type=token_type;last_text=token_text;}
return output.join('');}