/**
* Load a component extension
*
* Override this class to load component class files which exist outside of ICE's path
*
* @param string $ext Name of the extension
* @return string Name of the class which was loaded
*/
public function load_ext($ext)
{
// expand extension name
$ext_full = $this->policy()->get_handle() . '/' . $ext;
// try to load it with extension loader
return ICE_Ext_Loader::load_one($ext_full);
}
/**
* Return singleton instance
*
* @return ICE_Ext_Loader
*/
public static final function instance()
{
// new instance if necessary
if (!self::$instance instanceof self) {
// create singleton instance
self::$instance = new self();
}
return self::$instance;
}
/**
* Load the scheme, using a theme as the starting point for the stack
*
* This method recursively crawls UP the theme hiearachy
*
* @param string $theme Theme's *directory name*
* @return boolean
*/
public function load($theme = null)
{
// was a theme passed?
if (empty($theme)) {
// fall back to using active theme
$theme = ICE_ACTIVE_THEME;
}
// get path to config file
$ini_file = $this->theme_config_file($theme, $this->config_file);
// does ini file exist?
if (ICE_Files::cache($ini_file)->is_readable()) {
// parse it
$ini = parse_ini_file($ini_file, true);
// push onto loaded stack
$this->config_files_loaded->push($ini_file);
} else {
// yipes, theme has no ini file.
// assume that parent theme is the root theme
$ini[self::DIRECTIVE_PARENT_THEME] = $this->root_theme;
}
// make sure we got something
if ($ini !== false) {
// parent theme?
$parent_theme = isset($ini[self::DIRECTIVE_PARENT_THEME]) ? $ini[self::DIRECTIVE_PARENT_THEME] : false;
// recurse up the theme stack if necessary
if ($parent_theme) {
// load it
$this->load($parent_theme);
}
// push onto the stack AFTER recursion
$this->themes->push($theme);
// loop through directives and set them
foreach ($ini as $name => $value) {
if ($name == self::DIRECTIVE_ADVANCED) {
if (is_array($value)) {
foreach ($value as $name_adv => $value_adv) {
$this->directives()->set($theme, $name_adv, $value_adv, true);
}
}
continue;
} else {
$this->directives()->set($theme, $name, $value, true);
}
}
// make sure theme is NOT compiled in
if (false === $this->themes_compiled->contains($theme)) {
// add extension dir to extension loader
ICE_Ext_Loader::path($this->theme_file($theme, $this->exts_dir));
}
} else {
throw new Exception('Failed to parse theme ini file: ' . $ini_file);
}
}
/**
* Return path to an ext file
*
* @param string $filename
* @return string
*/
public final function locate_file($filename)
{
// loop class ancestry
foreach ($this->reflect_stack() as $reflection) {
// call ext loader file locator helper
$located = ICE_Ext_Loader::instance()->locate_file($reflection->getName(), $filename);
// anything?
if ($located) {
return $located;
}
}
// no file found :(
return false;
}
