silverstripe-widgets/code/form/WidgetAreaEditor.php

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<?php
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/**
* Special field type for selecting and configuring widgets on a page.
*
* @package widgets
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*/
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class WidgetAreaEditor extends FormField
{
/**
* @param string $name
* @param array $widgetClasses
* @param int $maxWidgets
*/
public function __construct($name, $widgetClasses = array('Widget'), $maxWidgets = 0)
{
$this->MaxWidgets = $maxWidgets;
$this->widgetClasses = $widgetClasses;
parent::__construct($name);
}
/**
* @param array $properties
*
* @return string - HTML
*/
public function FieldHolder($properties = array())
{
Requirements::css('widgets/css/WidgetAreaEditor.css');
Requirements::javascript('widgets/javascript/WidgetAreaEditor.js');
return $this->renderWith("WidgetAreaEditor");
}
/**
*
* @return ArrayList
*/
public function AvailableWidgets()
{
$widgets= new ArrayList();
foreach ($this->widgetClasses as $widgetClass) {
$classes = ClassInfo::subclassesFor($widgetClass);
if (isset($classes['Widget'])) {
unset($classes['Widget']);
} elseif (isset($classes[0]) && $classes[0] == 'Widget') {
unset($classes[0]);
}
foreach ($classes as $class) {
$available = Config::inst()->get($class, 'only_available_in');
if (!empty($available) && is_array($available)) {
if (in_array($this->Name, $available)) {
$widgets->push(singleton($class));
}
} else {
$widgets->push(singleton($class));
}
}
}
return $widgets;
}
/**
* @return HasManyList
*/
public function UsedWidgets()
{
// Call class_exists() to load Widget.php earlier and avoid a segfault
class_exists('Widget');
$relationName = $this->name;
$widgets = $this->form->getRecord()->getComponent($relationName)->Items();
return $widgets;
}
/**
* @return string
*/
public function IdxField()
{
return $this->id() . 'ID';
}
/**
*
* @return int
*/
public function Value()
{
$relationName = $this->name;
return $this->form->getRecord()->getComponent($relationName)->ID;
}
/**
* @param DataObjectInterface $record
*/
public function saveInto(DataObjectInterface $record)
{
$name = $this->name;
$idName = $name . "ID";
$widgetarea = $record->getComponent($name);
$widgetarea->write();
$record->$idName = $widgetarea->ID;
$widgets = $widgetarea->Items();
// store the field IDs and delete the missing fields
// alternatively, we could delete all the fields and re add them
$missingWidgets = array();
if ($widgets) {
foreach ($widgets as $existingWidget) {
$missingWidgets[$existingWidget->ID] = $existingWidget;
}
}
if (!$this->getForm()) {
throw new Exception("no form");
}
$widgetData = $this->getForm()->getRequest()->requestVar('Widget');
if ($widgetData && isset($widgetData[$this->getName()])) {
$widgetAreaData = $widgetData[$this->getName()];
foreach ($widgetAreaData as $newWidgetID => $newWidgetData) {
// Sometimes the id is "new-1" or similar, ensure this doesn't get into the query
if (!is_numeric($newWidgetID)) {
$newWidgetID = 0;
}
$widget = null;
if ($newWidgetID) {
// \"ParentID\" = '0' is for the new page
$widget = Widget::get()
->filter('ParentID', array(0, $record->$name()->ID))
->byID($newWidgetID);
// check if we are updating an existing widget
if ($widget && isset($missingWidgets[$widget->ID])) {
unset($missingWidgets[$widget->ID]);
}
}
// create a new object
if (!$widget
&& !empty($newWidgetData['Type'])
&& class_exists($newWidgetData['Type'])
&& is_subclass_of($newWidgetData['Type'], 'Widget')
) {
$widget = Injector::inst()->create($newWidgetData['Type']);
$widget->ID = 0;
$widget->ParentID = $record->$name()->ID;
}
if ($widget) {
if ($widget->ParentID == 0) {
$widget->ParentID = $record->$name()->ID;
}
$widget->populateFromPostData($newWidgetData);
}
}
}
// remove the fields not saved
if ($missingWidgets) {
foreach ($missingWidgets as $removedWidget) {
if (isset($removedWidget) && is_numeric($removedWidget->ID)) {
$removedWidget->delete();
}
}
}
}
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}