mirror of
https://github.com/silverstripe/silverstripe-framework
synced 2024-10-22 14:05:37 +02:00
595a6dc333
- Implements recommended solution from bug report. - Calculates last index only once instead of at each loop iteration. - There was no existing test for this method, so if someone can implement a test, that would be great.
571 lines
16 KiB
PHP
571 lines
16 KiB
PHP
<?php
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/**
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* A list designed to hold form field instances.
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*
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* @package forms
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* @subpackage fields-structural
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*/
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class FieldList extends ArrayList {
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/**
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* Cached flat representation of all fields in this set,
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* including fields nested in {@link CompositeFields}.
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*
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* @uses self::collateDataFields()
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* @var array
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*/
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protected $sequentialSet;
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/**
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* @var array
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*/
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protected $sequentialSaveableSet;
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/**
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* @todo Documentation
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*/
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protected $containerField;
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public function __construct($items = array()) {
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if (!is_array($items) || func_num_args() > 1) {
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$items = func_get_args();
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}
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parent::__construct($items);
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foreach ($items as $item) {
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if ($item instanceof FormField) $item->setContainerFieldSet($this);
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}
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}
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/**
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* Return a sequential set of all fields that have data. This excludes wrapper composite fields
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* as well as heading / help text fields.
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*/
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public function dataFields() {
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if(!$this->sequentialSet) $this->collateDataFields($this->sequentialSet);
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return $this->sequentialSet;
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}
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public function saveableFields() {
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if(!$this->sequentialSaveableSet) $this->collateDataFields($this->sequentialSaveableSet, true);
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return $this->sequentialSaveableSet;
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}
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protected function flushFieldsCache() {
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$this->sequentialSet = null;
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$this->sequentialSaveableSet = null;
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}
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protected function collateDataFields(&$list, $saveableOnly = false) {
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foreach($this as $field) {
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if($field->isComposite()) $field->collateDataFields($list, $saveableOnly);
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if($saveableOnly) {
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$isIncluded = ($field->hasData() && !$field->isReadonly() && !$field->isDisabled());
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} else {
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$isIncluded = ($field->hasData());
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}
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if($isIncluded) {
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$name = $field->getName();
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if(isset($list[$name])) {
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$errSuffix = "";
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if($this->form) $errSuffix = " in your '{$this->form->class}' form called '" . $this->form->Name() . "'";
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else $errSuffix = '';
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user_error("collateDataFields() I noticed that a field called '$name' appears twice$errSuffix.", E_USER_ERROR);
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}
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$list[$name] = $field;
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}
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}
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}
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/**
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* Add an extra field to a tab within this FieldList.
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* This is most commonly used when overloading getCMSFields()
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*
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* @param string $tabName The name of the tab or tabset. Subtabs can be referred to as TabSet.Tab or TabSet.Tab.Subtab.
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* This function will create any missing tabs.
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* @param FormField $field The {@link FormField} object to add to the end of that tab.
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* @param string $insertBefore The name of the field to insert before. Optional.
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*/
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public function addFieldToTab($tabName, $field, $insertBefore = null) {
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// This is a cache that must be flushed
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$this->flushFieldsCache();
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// Find the tab
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$tab = $this->findOrMakeTab($tabName);
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// Add the field to the end of this set
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if($insertBefore) $tab->insertBefore($field, $insertBefore);
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else $tab->push($field);
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}
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/**
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* Add a number of extra fields to a tab within this FieldList.
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* This is most commonly used when overloading getCMSFields()
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*
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* @param string $tabName The name of the tab or tabset. Subtabs can be referred to as TabSet.Tab or TabSet.Tab.Subtab.
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* This function will create any missing tabs.
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* @param array $fields An array of {@link FormField} objects.
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*/
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public function addFieldsToTab($tabName, $fields, $insertBefore = null) {
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$this->flushFieldsCache();
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// Find the tab
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$tab = $this->findOrMakeTab($tabName);
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// Add the fields to the end of this set
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foreach($fields as $field) {
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// Check if a field by the same name exists in this tab
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if($insertBefore) {
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$tab->insertBefore($field, $insertBefore);
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} elseif($tab->fieldByName($field->getName())) {
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// It exists, so we need to replace the old one
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$this->replaceField($field->getName(), $field);
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} else {
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$tab->push($field);
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}
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}
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}
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/**
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* Remove the given field from the given tab in the field.
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*
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* @param string $tabName The name of the tab
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* @param string $fieldName The name of the field
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*/
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public function removeFieldFromTab($tabName, $fieldName) {
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$this->flushFieldsCache();
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// Find the tab
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$tab = $this->findOrMakeTab($tabName);
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$tab->removeByName($fieldName);
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}
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/**
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* Removes a number of fields from a Tab/TabSet within this FieldList.
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*
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* @param string $tabName The name of the Tab or TabSet field
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* @param array $fields A list of fields, e.g. array('Name', 'Email')
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*/
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public function removeFieldsFromTab($tabName, $fields) {
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$this->flushFieldsCache();
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// Find the tab
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$tab = $this->findOrMakeTab($tabName);
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// Add the fields to the end of this set
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foreach($fields as $field) $tab->removeByName($field);
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}
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/**
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* Remove a field from this FieldList by Name.
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* The field could also be inside a CompositeField.
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*
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* @param string $fieldName The name of the field or tab
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* @param boolean $dataFieldOnly If this is true, then a field will only
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* be removed if it's a data field. Dataless fields, such as tabs, will
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* be left as-is.
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*/
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public function removeByName($fieldName, $dataFieldOnly = false) {
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if(!$fieldName) {
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user_error('FieldList::removeByName() was called with a blank field name.', E_USER_WARNING);
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}
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$this->flushFieldsCache();
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foreach($this->items as $i => $child) {
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if(is_object($child)){
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$childName = $child->getName();
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if(!$childName) $childName = $child->Title();
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if(($childName == $fieldName) && (!$dataFieldOnly || $child->hasData())) {
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array_splice( $this->items, $i, 1 );
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break;
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} else if($child->isComposite()) {
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$child->removeByName($fieldName, $dataFieldOnly);
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}
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}
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}
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}
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/**
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* Replace a single field with another. Ignores dataless fields such as Tabs and TabSets
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*
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* @param string $fieldName The name of the field to replace
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* @param FormField $newField The field object to replace with
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* @return boolean TRUE field was successfully replaced
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* FALSE field wasn't found, nothing changed
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*/
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public function replaceField($fieldName, $newField) {
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$this->flushFieldsCache();
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foreach($this->items as $i => $field) {
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if(is_object($field)) {
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if($field->getName() == $fieldName && $field->hasData()) {
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$this->items[$i] = $newField;
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return true;
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} else if($field->isComposite()) {
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if($field->replaceField($fieldName, $newField)) return true;
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}
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}
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}
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return false;
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}
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/**
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* Rename the title of a particular field name in this set.
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*
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* @param string $fieldName Name of field to rename title of
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* @param string $newFieldTitle New title of field
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* @return boolean
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*/
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public function renameField($fieldName, $newFieldTitle) {
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$field = $this->dataFieldByName($fieldName);
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if(!$field) return false;
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$field->setTitle($newFieldTitle);
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return $field->Title() == $newFieldTitle;
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}
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/**
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* @return boolean
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*/
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public function hasTabSet() {
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foreach($this->items as $i => $field) {
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if(is_object($field) && $field instanceof TabSet) {
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return true;
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}
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}
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return false;
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}
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/**
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* Returns the specified tab object, creating it if necessary.
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*
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* @todo Support recursive creation of TabSets
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*
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* @param string $tabName The tab to return, in the form "Tab.Subtab.Subsubtab".
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* Caution: Does not recursively create TabSet instances, you need to make sure everything
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* up until the last tab in the chain exists.
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* @param string $title Natural language title of the tab. If {@link $tabName} is passed in dot notation,
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* the title parameter will only apply to the innermost referenced tab.
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* The title is only changed if the tab doesn't exist already.
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* @return Tab The found or newly created Tab instance
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*/
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public function findOrMakeTab($tabName, $title = null) {
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$parts = explode('.',$tabName);
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$last_idx = count($parts) - 1;
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// We could have made this recursive, but I've chosen to keep all the logic code within FieldList rather than add it to TabSet and Tab too.
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$currentPointer = $this;
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foreach($parts as $k => $part) {
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$parentPointer = $currentPointer;
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$currentPointer = $currentPointer->fieldByName($part);
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// Create any missing tabs
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if(!$currentPointer) {
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if(is_a($parentPointer, 'TabSet')) {
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// use $title on the innermost tab only
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if ($k == $last_idx) {
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if (!isset($title)) {
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$title = $part;
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}
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$currentPointer = new Tab($part, $title);
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}
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else {
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$currentPointer = new TabSet($part);
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}
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$parentPointer->push($currentPointer);
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}
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else {
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$withName = ($parentPointer->hasMethod('Name')) ? " named '{$parentPointer->getName()}'" : null;
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user_error("FieldList::addFieldToTab() Tried to add a tab to object '{$parentPointer->class}'{$withName} - '$part' didn't exist.", E_USER_ERROR);
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}
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}
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}
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return $currentPointer;
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}
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/**
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* Returns a named field.
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* You can use dot syntax to get fields from child composite fields
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*
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* @todo Implement similiarly to dataFieldByName() to support nested sets - or merge with dataFields()
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*/
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public function fieldByName($name) {
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if(strpos($name,'.') !== false) list($name, $remainder) = explode('.',$name,2);
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else $remainder = null;
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foreach($this->items as $child) {
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if(trim($name) == trim($child->getName()) || $name == $child->id) {
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if($remainder) {
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if($child->isComposite()) {
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return $child->fieldByName($remainder);
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} else {
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user_error("Trying to get field '$remainder' from non-composite field $child->class.$name", E_USER_WARNING);
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return null;
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}
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} else {
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return $child;
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}
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}
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}
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}
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/**
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* Returns a named field in a sequential set.
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* Use this if you're using nested FormFields.
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*
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* @param string $name The name of the field to return
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* @return FormField instance
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*/
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public function dataFieldByName($name) {
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if($dataFields = $this->dataFields()) {
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foreach($dataFields as $child) {
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if(trim($name) == trim($child->getName()) || $name == $child->id) return $child;
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}
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}
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}
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/**
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* Inserts a field before a particular field in a FieldList.
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*
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* @param FormField $item The form field to insert
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* @param string $name Name of the field to insert before
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*/
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public function insertBefore($item, $name) {
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$this->onBeforeInsert($item);
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$item->setContainerFieldSet($this);
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$i = 0;
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foreach($this->items as $child) {
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if($name == $child->getName() || $name == $child->id) {
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array_splice($this->items, $i, 0, array($item));
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return $item;
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} elseif($child->isComposite()) {
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$ret = $child->insertBefore($item, $name);
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if($ret) return $ret;
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}
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$i++;
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}
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return false;
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}
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/**
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* Inserts a field after a particular field in a FieldList.
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*
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* @param FormField $item The form field to insert
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* @param string $name Name of the field to insert after
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*/
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public function insertAfter($item, $name) {
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$this->onBeforeInsert($item);
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$item->setContainerFieldSet($this);
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$i = 0;
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foreach($this->items as $child) {
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if($name == $child->getName() || $name == $child->id) {
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array_splice($this->items, $i+1, 0, array($item));
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return $item;
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} elseif($child->isComposite()) {
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$ret = $child->insertAfter($item, $name);
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if($ret) return $ret;
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}
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$i++;
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}
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return false;
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}
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/**
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* Push a single field into this FieldList instance.
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*
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* @param FormField $item The FormField to add
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* @param string $key An option array key (field name)
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*/
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public function push($item, $key = null) {
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$this->onBeforeInsert($item);
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$item->setContainerFieldSet($this);
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return parent::push($item, $key = null);
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}
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/**
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* Handler method called before the FieldList is going to be manipulated.
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*/
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protected function onBeforeInsert($item) {
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$this->flushFieldsCache();
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if($item->getName()) $this->rootFieldSet()->removeByName($item->getName(), true);
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}
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/**
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* Set the Form instance for this FieldList.
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*
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* @param Form $form The form to set this FieldList to
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*/
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public function setForm($form) {
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foreach($this as $field) $field->setForm($form);
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return $this;
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}
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/**
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* Load the given data into this form.
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*
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* @param data An map of data to load into the FieldList
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*/
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public function setValues($data) {
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foreach($this->dataFields() as $field) {
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$fieldName = $field->getName();
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if(isset($data[$fieldName])) $field->setValue($data[$fieldName]);
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}
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return $this;
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}
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/**
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* Return all <input type="hidden"> fields
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* in a form - including fields nested in {@link CompositeFields}.
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* Useful when doing custom field layouts.
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*
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* @return FieldList
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*/
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public function HiddenFields() {
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$hiddenFields = new FieldList();
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$dataFields = $this->dataFields();
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if($dataFields) foreach($dataFields as $field) {
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if($field instanceof HiddenField) $hiddenFields->push($field);
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}
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return $hiddenFields;
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}
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/**
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* Return all fields except for the hidden fields.
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* Useful when making your own simplified form layouts.
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*/
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public function VisibleFields() {
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$visibleFields = new FieldList();
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foreach($this as $field) {
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if(!($field instanceof HiddenField)) $visibleFields->push($field);
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}
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return $visibleFields;
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}
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/**
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* Transform this FieldList with a given tranform method,
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* e.g. $this->transform(new ReadonlyTransformation())
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*
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* @return FieldList
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*/
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public function transform($trans) {
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$this->flushFieldsCache();
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$newFields = new FieldList();
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foreach($this as $field) {
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$newFields->push($field->transform($trans));
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}
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return $newFields;
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}
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/**
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* Returns the root field set that this belongs to
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*/
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public function rootFieldSet() {
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if($this->containerField) return $this->containerField->rootFieldSet();
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else return $this;
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}
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public function setContainerField($field) {
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$this->containerField = $field;
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return $this;
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}
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/**
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* Transforms this FieldList instance to readonly.
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*
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* @return FieldList
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*/
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public function makeReadonly() {
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return $this->transform(new ReadonlyTransformation());
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}
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/**
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* Transform the named field into a readonly feld.
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*
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* @param string|FormField
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*/
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public function makeFieldReadonly($field) {
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$fieldName = ($field instanceof FormField) ? $field->getName() : $field;
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$srcField = $this->dataFieldByName($fieldName);
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$this->replaceField($fieldName, $srcField->performReadonlyTransformation());
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}
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/**
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* Change the order of fields in this FieldList by specifying an ordered list of field names.
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* This works well in conjunction with SilverStripe's scaffolding functions: take the scaffold, and
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* shuffle the fields around to the order that you want.
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*
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* Please note that any tabs or other dataless fields will be clobbered by this operation.
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*
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* @param array $fieldNames Field names can be given as an array, or just as a list of arguments.
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*/
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public function changeFieldOrder($fieldNames) {
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// Field names can be given as an array, or just as a list of arguments.
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if(!is_array($fieldNames)) $fieldNames = func_get_args();
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// Build a map of fields indexed by their name. This will make the 2nd step much easier.
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$fieldMap = array();
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foreach($this->dataFields() as $field) $fieldMap[$field->getName()] = $field;
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// Iterate through the ordered list of names, building a new array to be put into $this->items.
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// While we're doing this, empty out $fieldMap so that we can keep track of leftovers.
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// Unrecognised field names are okay; just ignore them
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$fields = array();
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foreach($fieldNames as $fieldName) {
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if(isset($fieldMap[$fieldName])) {
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$fields[] = $fieldMap[$fieldName];
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unset($fieldMap[$fieldName]);
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}
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}
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// Add the leftover fields to the end of the list.
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$fields = $fields + array_values($fieldMap);
|
|
|
|
// Update our internal $this->items parameter.
|
|
$this->items = $fields;
|
|
|
|
$this->flushFieldsCache();
|
|
}
|
|
|
|
/**
|
|
* Find the numerical position of a field within
|
|
* the children collection. Doesn't work recursively.
|
|
*
|
|
* @param string|FormField
|
|
* @return Position in children collection (first position starts with 0). Returns FALSE if the field can't be found.
|
|
*/
|
|
public function fieldPosition($field) {
|
|
if(is_object($field)) $field = $field->getName();
|
|
|
|
$i = 0;
|
|
foreach($this->dataFields() as $child) {
|
|
if($child->getName() == $field) return $i;
|
|
$i++;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Default template rendering of a FieldList will concatenate all FieldHolder values.
|
|
*/
|
|
function forTemplate() {
|
|
$output = "";
|
|
foreach($this as $field) {
|
|
$output .= $field->FieldHolder();
|
|
}
|
|
return $output;
|
|
}
|
|
} |