Same name in other branches
  1. 5.0.x advagg_js_minify/jsqueeze.inc \Patchwork\JSqueeze::extractClosures()
  2. 6.0.x advagg_js_minify/jsqueeze.inc \Patchwork\JSqueeze::extractClosures()
  3. 7.x-2.x advagg_js_compress/jsqueeze.inc \Patchwork\JSqueeze::extractClosures()
  4. 8.x-2.x advagg_js_minify/jsqueeze.inc \Patchwork\JSqueeze::extractClosures()
  5. 8.x-4.x advagg_js_minify/jsqueeze.inc \Patchwork\JSqueeze::extractClosures()
1 call to JSqueeze::extractClosures()
JSqueeze::squeeze in advagg_js_minify/jsqueeze.inc
Squeezes a JavaScript source code.

File

advagg_js_minify/jsqueeze.inc, line 533

Class

JSqueeze

Namespace

Patchwork

Code

protected function extractClosures($code) {
    $code = ';' . $code;
    $this->argFreq[-1] += substr_count($code, '}catch(');
    if ($this->argFreq[-1]) {
        // Special catch scope handling
        // FIXME: this implementation doesn't work with nested catch scopes who need
        // access to their parent's caught variable (but who needs that?).
        $f = preg_split("@}catch\\(({$this->varRx})@", $code, -1, PREG_SPLIT_DELIM_CAPTURE);
        $code = 'catch$scope$var' . mt_rand();
        $this->specialVarRx = $this->specialVarRx ? '(?:' . $this->specialVarRx . '|' . preg_quote($code) . ')' : preg_quote($code);
        $i = count($f) - 1;
        while ($i) {
            $c = 1;
            $j = 0;
            $l = strlen($f[$i]);
            while ($c && $j < $l) {
                $s = $f[$i][$j++];
                $c += '(' == $s ? 1 : (')' == $s ? -1 : 0);
            }
            if (!$c) {
                do {
                    $s = $f[$i][$j++];
                    $c += '{' == $s ? 1 : ('}' == $s ? -1 : 0);
                } while ($c && $j < $l);
            }
            $c = preg_quote($f[$i - 1], '#');
            $f[$i - 2] .= '}catch(' . preg_replace("#([.,{]?)(?<![a-zA-Z0-9_\$@]){$c}\\b#", '$1' . $code, $f[$i - 1] . substr($f[$i], 0, $j)) . substr($f[$i], $j);
            unset($f[$i--], $f[$i--]);
        }
        $code = $f[0];
    }
    $f = preg_split("'(?<![a-zA-Z0-9_\$])(function[ (].*?\\{)'", $code, -1, PREG_SPLIT_DELIM_CAPTURE);
    $i = count($f) - 1;
    $closures = array();
    while ($i) {
        $c = 1;
        $j = 0;
        $l = strlen($f[$i]);
        while ($c && $j < $l) {
            $s = $f[$i][$j++];
            $c += '{' == $s ? 1 : ('}' == $s ? -1 : 0);
        }
        switch (substr($f[$i - 2], -1)) {
            default:
                if (false !== ($c = strpos($f[$i - 1], ' ', 8))) {
                    break;
                }
            case false:
            case "\n":
            case ';':
            case '{':
            case '}':
            case ')':
            case ']':
                $c = strpos($f[$i - 1], '(', 8);
        }
        $l = "//''\"\"#{$i}'";
        $code = substr($f[$i - 1], $c);
        $closures[$l] = $code . substr($f[$i], 0, $j);
        $f[$i - 2] .= substr($f[$i - 1], 0, $c) . $l . substr($f[$i], $j);
        if ('(){' !== $code) {
            $j = substr_count($code, ',');
            do {
                isset($this->argFreq[$j]) ? ++$this->argFreq[$j] : ($this->argFreq[$j] = 1);
            } while ($j--);
        }
        $i -= 2;
    }
    return array(
        $f[0],
        $closures,
    );
}