function get_next_token(&$pos)
{
global $last_type, $last_text;
global $whitespace, $wordchar, $punct;
global $input, $input_length;
if (!$whitespace) {
$whitespace = make_array("\n\r\t ");
}
if (!$wordchar) {
$wordchar = make_array('abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_$');
}
if (!$punct) {
$punct = explode(' ', '+ - * / % & ++ -- = += -= *= /= %= == === != !== > < >= <= >> << >>> >>>= >>= <<= && &= | || ! !! , : ? ^ ^= |=');
}
$n_newlines = 0;
do {
if ($pos >= $input_length) {
return array('', TK_EOF);
}
$c = $input[$pos];
$pos += 1;
if ($c == "\n") {
nl($n_newlines == 0);
$n_newlines += 1;
}
} while (in_array($c, $whitespace));
if (in_array($c, $wordchar)) {
if ($pos < $input_length) {
while (in_array($input[$pos], $wordchar)) {
$c .= $input[$pos];
$pos += 1;
if ($pos == $input_length) {
break;
}
}
}
// small and surprisingly unugly hack for 1E-10 representation
if ($pos != $input_length and preg_match('/^\\d+[Ee]$/', $c) and $input[$pos] == '-') {
$pos += 1;
list($next_word, $next_type) = get_next_token($pos);
$c .= '-' . $next_word;
return array($c, TK_WORD);
}
if ($c == 'in') {
// hack for 'in' operator
return array($c, TK_OPERATOR);
}
return array($c, TK_WORD);
}
if ($c == '(' || $c == '[') {
return array($c, TK_START_EXPR);
}
if ($c == ')' || $c == ']') {
return array($c, TK_END_EXPR);
}
if ($c == '{') {
return array($c, TK_START_BLOCK);
}
if ($c == '}') {
return array($c, TK_END_BLOCK);
}
if ($c == ';') {
return array($c, TK_END_COMMAND);
}
if ($c == '/') {
// peek for comment /* ... */
if ($input[$pos] == '*') {
$comment = '';
$pos += 1;
if ($pos < $input_length) {
while (!($input[$pos] == '*' && isset($input[$pos + 1]) && $input[$pos + 1] == '/') && $pos < $input_length) {
$comment .= $input[$pos];
$pos += 1;
if ($pos >= $input_length) {
break;
}
}
}
$pos += 2;
return array("/*{$comment}*/", TK_BLOCK_COMMENT);
}
// peek for comment // ...
if ($input[$pos] == '/') {
$comment = $c;
while ($input[$pos] != "\r" && $input[$pos] != "\n") {
$comment .= $input[$pos];
$pos += 1;
if ($pos >= $input_length) {
break;
}
}
$pos += 1;
return array($comment, TK_COMMENT);
}
}
if ($c == "'" || $c == '"' || $c == '/' && ($last_type == TK_WORD and $last_text == 'return' or $last_type == TK_START_EXPR || $last_type == TK_END_BLOCK || $last_type == TK_OPERATOR || $last_type == TK_EOF || $last_type == TK_END_COMMAND)) {
// regexp
$sep = $c;
$c = '';
$esc = false;
if ($pos < $input_length) {
while ($esc || $input[$pos] != $sep) {
$c .= $input[$pos];
if (!$esc) {
$esc = $input[$pos] == '\\';
} else {
$esc = false;
}
$pos += 1;
if ($pos >= $input_length) {
break;
}
}
}
$pos += 1;
if ($last_type == TK_END_COMMAND) {
nl();
}
return array($sep . $c . $sep, TK_STRING);
}
if (in_array($c, $punct)) {
while ($pos < $input_length and in_array($c . $input[$pos], $punct)) {
$c .= $input[$pos];
$pos += 1;
if ($pos >= $input_length) {
break;
}
}
return array($c, TK_OPERATOR);
}
return array($c, TK_UNKNOWN);
}
function js_beautify($js_source_text, $tab_size = 4)
{
global $output, $token_text, $last_type, $last_text, $in, $ins, $indent, $tab_string, $is_last_nl;
global $input, $input_length;
// $tab_string = str_repeat(' ', $tab_size);
$tab_string = "\t";
$input = $js_source_text;
$input_length = strlen($input);
$last_word = '';
// last TK_WORD passed
$last_type = TK_START_EXPR;
// last token type
$last_text = '';
// last token text
$output = '';
$is_last_nl = true;
// was the last character written a newline?
// words which should always start on new line.
// simple hack for cases when lines aren't ending with semicolon.
// feel free to tell me about the ones that need to be added.
$line_starters = explode(',', 'continue,try,throw,return,var,if,switch,case,default,for,while,break,function');
// states showing if we are currently in expression (i.e. "if" case) - IN_EXPR, or in usual block (like, procedure), IN_BLOCK.
// some formatting depends on that.
$in = IN_BLOCK;
$ins = array($in);
$indent = 0;
$pos = 0;
// parser position
$in_case = false;
// flag for parser that case/default has been processed, and next colon needs special attention
while (true) {
list($token_text, $token_type) = get_next_token($pos);
if ($token_type == TK_EOF) {
break;
}
// $output .= " [$token_type:$last_type]";
switch ($token_type) {
case TK_START_EXPR:
in(IN_EXPR);
if ($last_type == TK_END_EXPR or $last_type == TK_START_EXPR) {
// do nothing on (( and )( and ][ and ]( ..
} elseif ($last_type != TK_WORD and $last_type != TK_OPERATOR) {
space();
} elseif (in_array($last_word, $line_starters) and $last_word != 'function') {
space();
}
token();
break;
case TK_END_EXPR:
token();
in_pop();
break;
case TK_START_BLOCK:
in(IN_BLOCK);
if ($last_type != TK_OPERATOR and $last_type != TK_START_EXPR) {
if ($last_type == TK_START_BLOCK) {
nl();
} else {
space();
}
}
token();
indent();
break;
case TK_END_BLOCK:
if ($last_type == TK_END_EXPR) {
unindent();
nl(false);
} elseif ($last_type == TK_END_BLOCK) {
unindent();
nl(false);
} elseif ($last_type == TK_START_BLOCK) {
// nothing
unindent();
} else {
unindent();
nl(false);
}
token();
in_pop();
break;
case TK_WORD:
if ($token_text == 'case' or $token_text == 'default') {
if ($last_text == ':') {
// switch cases following one another
remove_indent();
} else {
$indent--;
nl();
$indent++;
}
token();
$in_case = true;
break;
}
$prefix = PRINT_NONE;
if ($last_type == TK_END_BLOCK) {
if (!in_array(strtolower($token_text), array('else', 'catch', 'finally'))) {
$prefix = PRINT_NL;
} else {
$prefix = PRINT_SPACE;
space();
}
} elseif ($last_type == TK_END_COMMAND && $in == IN_BLOCK) {
$prefix = PRINT_NL;
} elseif ($last_type == TK_END_COMMAND && $in == IN_EXPR) {
$prefix = PRINT_SPACE;
} elseif ($last_type == TK_WORD) {
if ($last_word == 'else') {
// else if
$prefix = PRINT_SPACE;
} else {
$prefix = PRINT_SPACE;
}
} elseif ($last_type == TK_START_BLOCK) {
$prefix = PRINT_NL;
} elseif ($last_type == TK_END_EXPR) {
space();
}
if (in_array($token_text, $line_starters) or $prefix == PRINT_NL) {
if ($last_text == 'else') {
// no need to force newline on else break
// DONOTHING
space();
} elseif (($last_type == TK_START_EXPR or $last_text == '=') and $token_text == 'function') {
// no need to force newline on 'function': (function
// DONOTHING
} elseif ($last_type == TK_WORD and ($last_text == 'return' or $last_text == 'throw')) {
// no newline between 'return nnn'
space();
} else {
if ($last_type != TK_END_EXPR) {
if (($last_type != TK_START_EXPR or $token_text != 'var') and $last_text != ':') {
// no need to force newline on 'var': for (var x = 0...)
if ($token_text == 'if' and $last_type == TK_WORD and $last_word == 'else') {
// no newline for } else if {
space();
} else {
nl();
}
}
}
}
} elseif ($prefix == PRINT_SPACE) {
space();
}
token();
$last_word = strtolower($token_text);
break;
case TK_END_COMMAND:
token();
break;
case TK_STRING:
if ($last_type == TK_START_BLOCK or $last_type == TK_END_BLOCK) {
nl();
} elseif ($last_type == TK_WORD) {
space();
}
token();
break;
case TK_OPERATOR:
$start_delim = true;
$end_delim = true;
if ($token_text == ':' and $in_case) {
token();
// colon really asks for separate treatment
nl();
$expecting_case = false;
break;
}
$in_case = false;
if ($token_text == ',') {
if ($last_type == TK_END_BLOCK) {
token();
nl();
} else {
if ($in == IN_BLOCK) {
token();
nl();
} else {
token();
space();
}
}
break;
} elseif ($token_text == '--' or $token_text == '++') {
// unary operators special case
if ($last_text == ';') {
// space for (;; ++i)
$start_delim = true;
$end_delim = false;
} else {
$start_delim = false;
$end_delim = false;
}
} elseif ($token_text == '!' and $last_type == TK_START_EXPR) {
// special case handling: if (!a)
$start_delim = false;
$end_delim = false;
} elseif ($last_type == TK_OPERATOR) {
$start_delim = false;
$end_delim = false;
} elseif ($last_type == TK_END_EXPR) {
$start_delim = true;
$end_delim = true;
} elseif ($token_text == '.') {
// decimal digits or object.property
$start_delim = false;
$end_delim = false;
} elseif ($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) {
space();
}
token();
if ($end_delim) {
space();
}
break;
case TK_BLOCK_COMMENT:
nl();
token();
nl();
break;
case TK_COMMENT:
//if ($last_type != TK_COMMENT) {
nl();
//}
token();
nl();
break;
case TK_UNKNOWN:
token();
break;
}
if ($token_type != TK_COMMENT) {
$last_type = $token_type;
$last_text = $token_text;
}
}
// clean empty lines from redundant spaces
$output = preg_replace('/^ +$/m', '', $output);
return $output;
}