/**
* Parses embed() functions within the CSS.
* @access public
* @param $source
* @param $scaffold
* @return string
*/
public function process($source, $scaffold)
{
// We can only embed for file sources
if ($source->type != 'file') {
return;
}
foreach (Scaffold_Helper_CSS::find_functions('embed', $source->contents) as $found) {
// Get the full path to the file relative to the source
$path = $source->find($url);
// The file doesn't exist
if ($path === false) {
continue;
}
$id = 'embeds/' . md5($path);
$ext = pathinfo($path, PATHINFO_EXTENSION);
$mod_time = filemtime($path);
$mime = $this->_get_mime($ext);
// If it's a file we can actually use
if ($mime === false) {
continue;
}
// Try and load it from the cache
$data = $scaffold->cache->get($id);
// If the cached version has expired
if ($data === false or $mod_time > $data->last_modified) {
$data = base64_encode(file_get_contents($path));
$scaffold->cache->set($id, $data, $mod_time, false);
} else {
$data = $data->contents;
}
$string = "url(data:{$mime};base64,{$data})";
$source->contents = str_replace($found['string'], $string, $source->contents);
}
}
/**
* Find css style functions
* @author Anthony Short
* @test
*/
public function Find_css_style_functions()
{
$string = '#id {background:url( http://google.com );border-image:url("images/bullet.png")}';
$expected = array(0 => array('string' => 'url( http://google.com )', 'params' => array('http://google.com ')), 1 => array('string' => 'url("images/bullet.png")', 'params' => array('"images/bullet.png"')));
$output = Scaffold_Helper_CSS::find_functions('url', $string);
$this->assertEquals($output, $expected);
}
/**
* @access public
* @param $source
* @return string
*/
public function pre_process($source, $scaffold)
{
// Go through each custom function
foreach ($this->functions as $name => $function) {
$obj = $function[0];
$method = $function[1];
// Find them in the CSS
foreach (Scaffold_Helper_CSS::find_functions($name, $source->contents) as $found) {
// Call the hook method for this function
$result = call_user_func_array(array($obj, $method), $found['params']);
// Replace it in the CSS
$source->contents = str_replace($found['string'], $result, $source->contents);
}
}
}
