384 lines
11 KiB
PHP
Executable File
384 lines
11 KiB
PHP
Executable File
<?php
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/**
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* DataObjectSet designed for form fields.
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* It extends the DataObjectSet with the ability to get a sequential set of fields.
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* @package forms
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* @subpackage fields-structural
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*/
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class FieldSet extends DataObjectSet {
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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 $sequentialSet;
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/**
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* Return a sequential set of all fields that have data. This excludes wrapper composite fields
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* as well as heading / help text fields.
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*/
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public function dataFields() {
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if(!$this->sequentialSet) $this->collateDataFields($this->sequentialSet);
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return $this->sequentialSet;
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}
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protected function collateDataFields(&$list) {
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foreach($this as $field) {
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if($field->isComposite()) $field->collateDataFields($list);
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if($field->hasData()) {
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$name = $field->Name();
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if(isset($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] = $field;
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}
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}
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}
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/**
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* Add an extra field to a tab within this fieldset.
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* This is most commonly used when overloading getCMSFields()
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* @param tabName The name of the tab or tabset. Subtabs can be referred to as TabSet.Tab or TabSet.Tab.Subtab.
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* This function will create any missing tabs.
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* @param field The {@link FormField} object to add to the end of that tab.
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* @param insertBefore The name of the field to insert before. Optional.
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*/
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public function addFieldToTab($tabName, $field, $insertBefore = null) {
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// This is a cache that must be flushed
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$this->sequentialSet = null;
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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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* Remove the given field from the given tab in the field.
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*/
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public function removeFieldFromTab($tabName, $fieldName) {
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// This is a cache that must be flushed
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$this->sequentialSet = null;
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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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* Remove a field from this fieldset by name.
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* It musn't be buried in a composite field.--- changed
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* It could be buried in a composite field now. --- 5/09/2006
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*/
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public function removeByName($fieldName) {
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foreach($this->items as $i => $child) {
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if(is_object($child) && ($child->Name() == $fieldName || $child->Title() == $fieldName)) {
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// unset($this->items[$i]);
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array_splice( $this->items, $i, 1 );
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break;
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} else if($child->isComposite()) $child->removeByName($fieldName);
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}
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}
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/**
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* Add a number of extra fields to a tab within this fieldset.
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* This is most commonly used when overloading getCMSFields()
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* @param 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 fields An array of {@link FormField} objects.
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*/
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public function addFieldsToTab($tabName, $fields) {
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$this->sequentialSet = null;
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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) $tab->push($field);
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}
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public function replaceField($fieldName, $newField) {
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if($this->sequentialSet) $this->sequentialSet = null;
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foreach($this->items as $i => $field) {
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if(is_object($field)) {
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if($field->Name() == $fieldName) {
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$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, $newField)) return true;
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}
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}
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}
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return false;
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}
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/**
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* Returns the specified tab object, creating it if necessary.
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* @param tabName The tab to return, in the form "Tab.Subtab.Subsubtab"
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*/
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protected function findOrMakeTab($tabName) {
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$parts = explode('.',$tabName);
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// We could have made this recursive, but I've chosen to keep all the logic code within FieldSet rather than add it to TabSet and Tab too.
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$currentPointer = $this;
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foreach($parts as $part) {
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$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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$currentPointer = new Tab($part);
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$parentPointer->push($currentPointer);
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} else {
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user_error("FieldSet::addFieldToTab() Tried to add a tab to a " . $parentPointer->class . " object - '$part' didn't exist.", E_USER_ERROR);
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}
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}
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}
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return $currentPointer;
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}
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/**
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* Returns a named field.
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*
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* @todo Implement similiarly to dataFieldByName() to support nested sets - or merge with dataFields()
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*/
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public function fieldByName($name) {
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foreach($this->items as $child) {
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if($name == $child->Name() || $name == $child->id) return $child;
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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 $child) {
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if($name == $child->Name() || $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 FieldSet.
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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, $name) {
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if($this->sequentialSet) $this->sequentialSet = null;
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$i = 0;
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foreach($this->items as $child) {
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if($name == $child->Name() || $name == $child->id) {
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array_splice($this->items, $i, 0, array($item));
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return;
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}
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$i++;
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}
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$this->items[] = $item;
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}
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/**
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* Inserts an item before the item with name $name
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* It can be buried in a composite field
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* If no item with name $name is found, $item is inserted at the end of the FieldSet
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*
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* @param FormField $item The item to be inserted
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* @param string $name The name of the item that $item should be before
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* @param int $level For internal use only, should not be passed
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*/
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public function insertBeforeRecursive($item, $name, $level = 0) {
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if($this->sequentialSet) $this->sequentialSet = null;
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$i = 0;
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foreach($this->items as $child) {
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if($name == $child->Name() || $name == $child->id) {
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array_splice($this->items, $i, 0, array($item));
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return $level;
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} else if($child->isComposite()) {
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if($level = $child->insertBeforeRecursive($item,$name,$level+1)) return $level;
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}
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$i++;
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}
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if ($level === 0) {
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$this->items[] = $item;
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return 0;
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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 FieldSet.
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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, $name) {
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if($this->sequentialSet) $this->sequentialSet = null;
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$i = 0;
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foreach($this->items as $child) {
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if($name == $child->Name() || $name == $child->id) {
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array_splice($this->items, $i + 1, 0, array($item));
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return;
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}
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$i++;
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}
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$this->items[] = $item;
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}
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/**
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* Push a single field into this FieldSet 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, $key = null) {
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if($this->sequentialSet) $this->sequentialSet = null;
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return parent::push($item, $key = null);
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}
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/**
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* Set the Form instance for this FieldSet.
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*
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* @param Form $form
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*/
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public function setForm($form) {
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foreach($this as $field) $field->setForm($form);
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}
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/**
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* Load the given data into this form.
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* @param data An map of data to load into the FieldSet.
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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 = $field->Name();
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if(isset($data[$fieldName])) $field->setValue($data[$fieldName]);
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}
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}
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/**
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* Return all <input type="hidden"> fields
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* in a form - including fields nested in {@link CompositeFields}.
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* Useful when doing custom field layouts.
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*
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* @return FieldSet
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*/
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function HiddenFields() {
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$hiddenFields = new FieldSet();
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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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* Transform this FieldSet with a given tranform method,
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* e.g. $this->transform(new ReadonlyTransformation())
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*
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* @return FieldSet
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*/
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function transform($trans) {
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$this->sequentialSet = null;
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$newFields = new FieldSet();
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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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* Transforms this FieldSet instance to readonly.
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*
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* @return FieldSet
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*/
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function makeReadonly() {
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return $this->transform(new ReadonlyTransformation());
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}
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/**
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* Transform the named field into a readonly feld.
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*/
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function makeFieldReadonly($fieldName) {
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// Iterate on items, looking for the applicable field
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foreach($this->items as $i => $field) {
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// Once it's found, use FormField::transform to turn the field into a readonly version of itself.
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if($field->Name() == $fieldName) {
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$this->items[$i] = $field->transform(new ReadonlyTransformation());
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// Clear an internal cache
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$this->sequentialSet = null;
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// A true results indicates that the field was foudn
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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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* Change the order of fields in this FieldSet 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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* Field names can be given as an array, or just as a list of arguments.
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*/
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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->Name()] = $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);
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// Update our internal $this->items parameter.
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$this->items = $fields;
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// Re-set an internal cache
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$this->sequentialSet = null;
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}
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}
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?>
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