function advagg_does_js_start_with_use_strict

Given a js string, see if "use strict"; is the first thing ran.

Paramètres

string $filename: String; filename containing path information as well.

Return value

bool True if "use strict"; is the first thing ran.

2 calls to advagg_does_js_start_with_use_strict()

advagg_insert_update_files dans ./advagg.inc

Insert/Update data in the advagg_files table.

advagg_update_7213 dans ./advagg.install

Populate the use_strict field in the advagg_files table.

Fichier

./advagg.inc, line 326

Code

function advagg_does_js_start_with_use_strict($filename) {
    $files =& drupal_static(__FUNCTION__, array());
    if (!isset($files[$filename])) {
        // Make advagg_get_*_aggregate_contents() available.
        module_load_include('inc', 'advagg', 'advagg.missing');
        $aggregate_settings = advagg_current_hooks_hash_array();
        $file_aggregate = array(
            $filename => array(),
        );
        list($contents) = advagg_get_js_aggregate_contents($file_aggregate, $aggregate_settings);
        // See if the js file starts with "use strict";.
        // Trim the JS down to 24kb.
        $length = variable_get('advagg_js_header_length', ADVAGG_JS_HEADER_LENGTH);
        $header = advagg_get_js_header($contents, $length);
        // Look for the string.
        $use_strict = stripos($header, '"use strict";');
        $strict_js = FALSE;
        if ($use_strict === FALSE) {
            $use_strict = stripos($header, "'use strict';");
        }
        if ($use_strict !== FALSE) {
            if ($use_strict == 0) {
                $strict_js = TRUE;
            }
            else {
                // Get all text before "use strict";.
                $substr = substr($header, 0, $use_strict);
                // Check if there are any comments.
                $single_line_comment = strpos($substr, '//');
                $multi_line_comment = strpos($substr, '/*');
                $in_function = strpos($substr, '{');
                if ($single_line_comment !== FALSE || $multi_line_comment !== FALSE) {
                    // Remove js comments and try again.
                    advagg_remove_js_comments($header);
                    // Look for the string.
                    $use_strict = stripos($header, '"use strict";');
                    if ($use_strict === FALSE) {
                        $use_strict = stripos($header, "'use strict';");
                    }
                    // Get all text before "use strict"; with comments removed.
                    $substr = substr($header, 0, $use_strict);
                    // Check if there is a function before use strict.
                    $in_function = strpos($substr, '{');
                }
                if ($in_function === FALSE) {
                    $strict_js = TRUE;
                }
            }
        }
        $files[$filename] = $strict_js;
    }
    return $files[$filename];
}