function fetchElement($name, $value, &$node, $control_name)
{
$class = $node->attributes('class') ? 'class="' . $node->attributes('class') . '"' : 'class="inputbox"';
// user-friendly names for image processing libraries
$items = array();
foreach ($node->children() as $o) {
$val = $o->attributes('value');
$textkey = $o->data();
$items[$val] = $textkey;
}
// test which image processing libraries are supported
$supported = array();
if (is_gd_supported()) {
$supported['gd'] = 'GD';
}
if (is_imagick_supported()) {
$supported['imagick'] = 'ImageMagick';
}
if (empty($supported)) {
// no library is supported
if (isset($items['none'])) {
$textkey = $items['none'];
} else {
$textkey = 'none';
}
return $this->renderNone($textkey, $control_name . '[' . $name . ']', $class, $control_name . $name);
} else {
// at least a single library is supported
$supported['default'] = 'default';
foreach ($items as $key => $textkey) {
if (isset($supported[$key])) {
$supported[$key] = $textkey;
}
}
return $this->renderHtmlSelect($supported, $control_name . '[' . $name . ']', $class, $value, $control_name . $name);
}
}
public function validate()
{
$this->multilingual = (bool) $this->multilingual;
$this->thumbscache = (bool) $this->thumbscache;
$this->contentcache = (bool) $this->contentcache;
switch ($this->library) {
case 'gd':
if (!is_gd_supported()) {
$this->library = 'default';
}
break;
case 'imagick':
if (!is_imagick_supported()) {
$this->library = 'default';
}
break;
default:
$this->library = 'default';
}
}
public function getInput()
{
$class = isset($this->element['class']) ? 'class="' . (string) $this->element['class'] . '"' : 'class="inputbox"';
// user-friendly names for image processing libraries
$items = array();
foreach ($this->element->option as $o) {
$val = (string) $o['value'];
// attribute "value"
$textkey = (string) $o;
// element content
$items[$val] = $textkey;
}
// test which image processing libraries are supported
$supported = array();
if (is_gd_supported()) {
$supported['gd'] = 'GD';
}
if (is_imagick_supported()) {
$supported['imagick'] = 'ImageMagick';
}
if (empty($supported)) {
// no library is supported
if (isset($items['none'])) {
$textkey = $items['none'];
} else {
$textkey = 'none';
}
return $this->renderNone($textkey, $this->name, $class);
} else {
// at least a single library is supported
$supported['default'] = 'default';
foreach ($items as $key => $textkey) {
if (isset($supported[$key])) {
$supported[$key] = $textkey;
}
}
return $this->renderHtmlSelect($supported, $this->name, $class, $this->value);
}
}
public static function instantiate($library)
{
if ($library == 'default') {
if (is_imagick_supported()) {
$library = 'imagick';
} else {
$library = 'gd';
}
}
switch ($library) {
case 'imagick':
if (is_imagick_supported()) {
return new SIGPlusImageLibraryImagick();
}
case 'gd':
if (is_gd_supported()) {
return new SIGPlusImageLibraryGD();
}
}
return new SIGPlusImageLibrary();
// all operations will throw an image library unavailable exception
}