/**
* Post processes CSS.
*
* This method post processes all of the CSS before it is served for this theme.
* This is done so that things such as image URL's can be swapped in and to
* run any specific CSS post process method the theme has requested.
* This allows themes to use CSS settings.
*
* @param string $css The CSS to process.
* @return string The processed CSS.
*/
public function post_process($css)
{
// now resolve all image locations
if (preg_match_all('/\\[\\[pix:([a-z0-9_]+\\|)?([^\\]]+)\\]\\]/', $css, $matches, PREG_SET_ORDER)) {
$replaced = array();
foreach ($matches as $match) {
if (isset($replaced[$match[0]])) {
continue;
}
$replaced[$match[0]] = true;
$imagename = $match[2];
$component = rtrim($match[1], '|');
$imageurl = $this->pix_url($imagename, $component)->out(false);
// we do not need full url because the image.php is always in the same dir
$imageurl = preg_replace('|^http.?://[^/]+|', '', $imageurl);
$css = str_replace($match[0], $imageurl, $css);
}
}
// Now resolve all font locations.
if (preg_match_all('/\\[\\[font:([a-z0-9_]+\\|)?([^\\]]+)\\]\\]/', $css, $matches, PREG_SET_ORDER)) {
$replaced = array();
foreach ($matches as $match) {
if (isset($replaced[$match[0]])) {
continue;
}
$replaced[$match[0]] = true;
$fontname = $match[2];
$component = rtrim($match[1], '|');
$fonturl = $this->font_url($fontname, $component)->out(false);
// We do not need full url because the font.php is always in the same dir.
$fonturl = preg_replace('|^http.?://[^/]+|', '', $fonturl);
$css = str_replace($match[0], $fonturl, $css);
}
}
// Post processing using an object representation of CSS.
$hastreeprocessor = !empty($this->csstreepostprocessor) && function_exists($this->csstreepostprocessor);
$needsparsing = $hastreeprocessor || !empty($this->rtlmode);
if ($needsparsing) {
$parser = new core_cssparser($css);
$csstree = $parser->parse();
unset($parser);
if ($this->rtlmode) {
$this->rtlize($csstree);
}
if ($hastreeprocessor) {
$fn = $this->csstreepostprocessor;
$fn($csstree, $this);
}
$css = $csstree->render();
unset($csstree);
}
// now resolve all theme settings or do any other postprocessing
$csspostprocess = $this->csspostprocess;
if (function_exists($csspostprocess)) {
$css = $csspostprocess($css, $this);
}
return $css;
}
/**
* Post processes CSS.
*
* This method post processes all of the CSS before it is served for this theme.
* This is done so that things such as image URL's can be swapped in and to
* run any specific CSS post process method the theme has requested.
* This allows themes to use CSS settings.
*
* @param string $css The CSS to process.
* @return string The processed CSS.
*/
public function post_process($css)
{
// now resolve all image locations
if (preg_match_all('/\\[\\[pix:([a-z0-9_]+\\|)?([^\\]]+)\\]\\]/', $css, $matches, PREG_SET_ORDER)) {
$replaced = array();
foreach ($matches as $match) {
if (isset($replaced[$match[0]])) {
continue;
}
$replaced[$match[0]] = true;
$imagename = $match[2];
$component = rtrim($match[1], '|');
$imageurl = $this->pix_url($imagename, $component)->out(false);
// we do not need full url because the image.php is always in the same dir
$imageurl = preg_replace('|^http.?://[^/]+|', '', $imageurl);
$css = str_replace($match[0], $imageurl, $css);
}
}
// Now resolve all font locations.
if (preg_match_all('/\\[\\[font:([a-z0-9_]+\\|)?([^\\]]+)\\]\\]/', $css, $matches, PREG_SET_ORDER)) {
$replaced = array();
foreach ($matches as $match) {
if (isset($replaced[$match[0]])) {
continue;
}
$replaced[$match[0]] = true;
$fontname = $match[2];
$component = rtrim($match[1], '|');
$fonturl = $this->font_url($fontname, $component)->out(false);
// We do not need full url because the font.php is always in the same dir.
$fonturl = preg_replace('|^http.?://[^/]+|', '', $fonturl);
$css = str_replace($match[0], $fonturl, $css);
}
}
// Now resolve all theme settings or do any other postprocessing.
// This needs to be done before calling core parser, since the parser strips [[settings]] tags.
$csspostprocess = $this->csspostprocess;
if (function_exists($csspostprocess)) {
$css = $csspostprocess($css, $this);
}
// Post processing using an object representation of CSS.
$treeprocessor = $this->get_css_tree_post_processor();
$needsparsing = !empty($treeprocessor) || !empty($this->rtlmode);
if ($needsparsing) {
// We might need more memory/time to do this, so let's play safe.
raise_memory_limit(MEMORY_EXTRA);
core_php_time_limit::raise(300);
$parser = new core_cssparser($css);
$csstree = $parser->parse();
unset($parser);
if ($this->rtlmode) {
$this->rtlize($csstree);
}
if ($treeprocessor) {
$treeprocessor($csstree, $this);
}
$css = $csstree->render();
unset($csstree);
}
return $css;
}