/**
* fix_mediafilter
*
* @return xxx
*/
function fix_mediafilter()
{
global $CFG;
if (!$this->hotpot->usemediafilter) {
return false;
}
if (!hotpot::load_mediafilter_filter($this->hotpot->usemediafilter)) {
return false;
}
$mediafilterclass = 'hotpot_mediafilter_' . $this->hotpot->usemediafilter;
$mediafilter = new $mediafilterclass($this);
$mediafilter->fix('headcontent', $this);
$mediafilter->fix('bodycontent', $this);
if ($mediafilter->js_inline) {
// remove the internal </script><script ... > joins from the inline javascripts (js_inline)
$search = '/(?:\\s*\\/\\/\\]\\]>)?' . '\\s*<\\/script>\\s*<script type="text\\/javascript">' . '(?:\\s*\\/\\/<!\\[CDATA\\[[ \\t]*)?/is';
$mediafilter->js_inline = preg_replace($search, '', $mediafilter->js_inline);
// extract urls of deferred scripts from $mediafilter->js_external
if (preg_match_all($this->tagpattern('script'), $mediafilter->js_external, $scripts, PREG_OFFSET_CAPTURE)) {
$deferred_js = array();
$strlen_wwwroot = strlen($CFG->wwwroot);
foreach (array_reverse($scripts[0]) as $script) {
// $script [0] => matched string, [1] => offset to start of matched string
$remove = false;
if (strpos($script[0], 'type="text/javascript"')) {
if (preg_match('/src="(.*?)"/i', $script[0], $matches)) {
if (strpos($script[0], 'defer="defer"') === false) {
$inhead = true;
} else {
$inhead = false;
}
// we do not add scripts with $this->page->requires->js() because
// they will not then be added when content is retrieved from cache
//if (substr($matches[1], 0, $strlen_wwwroot)==$CFG->wwwroot) {
// $this->page->requires->js(substr($matches[1], $strlen_wwwroot), $inhead);
// $remove = true;
//} else
if ($inhead) {
// leave this script where it is (i.e. in the head)
} else {
array_unshift($deferred_js, '"' . addslashes_js($matches[1]) . '"');
$remove = true;
}
}
}
if ($remove) {
$mediafilter->js_external = substr_replace($mediafilter->js_external, '', $script[1], strlen($script[0]));
}
}
$deferred_js = implode(',', array_unique($deferred_js));
} else {
$deferred_js = '';
}
if ($deferred_js) {
$deferred_js = '' . ' // load deferred scripts' . "\n" . ' var head = document.getElementsByTagName("head")[0];' . "\n" . ' var urls = new Array(' . $deferred_js . ');' . "\n" . ' for (var i=0; i<urls.length; i++) {' . "\n" . ' var script = document.createElement("script");' . "\n" . ' script.type = "text/javascript";' . "\n" . ' script.src = urls[i];' . "\n" . ' head.appendChild(script);' . "\n" . ' }' . "\n";
}
$functions = '';
if (preg_match_all('/(?<=function )\\w+/', $mediafilter->js_inline, $names)) {
foreach ($names[0] as $name) {
list($start, $finish) = $this->locate_js_block('function', $name, $mediafilter->js_inline, true);
if ($finish) {
$functions .= trim(substr($mediafilter->js_inline, $start, $finish - $start)) . "\n";
$mediafilter->js_inline = substr_replace($mediafilter->js_inline, '', $start, $finish - $start);
}
}
}
// put all the inline javascript into one single function called "hotpot_mediafilter_loader()",
// which also loads up any deferred js, and force this function to be run when the page has loaded
$onload = 'hotpot_mediafilter_loader()';
$search = '/(\\/\\/<!\\[CDATA\\[)(.*)(\\/\\/\\]\\]>)/s';
$replace = '$1' . "\n" . $functions . 'function ' . $onload . '{' . '$2' . $deferred_js . $this->fix_mediafilter_onload_extra() . '} // end function ' . $onload . "\n" . "\n" . $this->fix_onload($onload) . '$3';
$mediafilter->js_inline = preg_replace($search, $replace, $mediafilter->js_inline, 1);
// append the inline javascripts to the end of the bodycontent
$this->bodycontent .= $mediafilter->js_inline;
}
if ($mediafilter->js_external) {
// append the external javascripts to the head content
$this->headcontent .= $mediafilter->js_external;
}
}
