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Set trigger targets arbitrary levels above current form context (#3465) 

Fixes #3260. Enables setting the target field for the trigger API to a form context an arbitrary number of levels above the current field by prepending the field name with `^` for each level to go up. For instance, if you had a field [allow_pictures] in the base form and a [records] repeater with [image] fields, and you set the target field for the trigger on [image] to [^allow_pictures] then it would work properly instead of looking for an [allow_pictures] field on the [records] field. Credit to @MartynasJanu. Documented in edc78b584b
This commit is contained in:
MartynasJanu 2018-03-22 07:25:18 +02:00 committed by Luke Towers
parent 4a2e959fb8
commit 13dadaa667
1 changed files with 50 additions and 1 deletions
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51
modules/backend/classes/FormField.php
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@ -18,6 +18,11 @@ class FormField
*/
const NO_SAVE_DATA = -1;
/**
* @var string A special character in yaml config files to indicate a field higher in hierarchy
*/
const HIERARCHY_UP = '^';
/**
* @var string Form field name.
*/
@ -461,6 +466,12 @@ class FormField
$triggerField = array_get($this->trigger, 'field');
$triggerCondition = array_get($this->trigger, 'condition');
// Check for parent field reference for the trigger condition
$triggerFieldParentLevel = $this->getNumberOfPrecedingSymbols($triggerField, self::HIERARCHY_UP);
if ($triggerFieldParentLevel > 0) {
$triggerField = substr($triggerField, $triggerFieldParentLevel);
}
// Apply these to container
if (in_array($triggerAction, ['hide', 'show']) && $position != 'container') {
return $attributes;
@ -471,7 +482,11 @@ class FormField
return $attributes;
}
if ($this->arrayName) {
// Reduce the field reference for the trigger condition field
if ($this->arrayName && $triggerFieldParentLevel > 0) {
$parentFormName = $this->reduceFieldNameHierarchy($this->arrayName, $triggerFieldParentLevel);
$fullTriggerField = $parentFormName.'['.implode('][', HtmlHelper::nameToArray($triggerField)).']';
} elseif ($this->arrayName) {
$fullTriggerField = $this->arrayName.'['.implode('][', HtmlHelper::nameToArray($triggerField)).']';
}
else {
@ -489,6 +504,40 @@ class FormField
return $attributes;
}
/**
* Reduces the field name hierarchy depth by $level levels.
* country[city][0][street][0] turns into country[city][0] when reduced by 1 level;
* country[city][0][street][0] turns into country when reduced by 2 levels;
* etc.
*
* @param string $fieldName
* @param int $level
* @return string
*/
protected function reduceFieldNameHierarchy($fieldName, $level) {
$parentFormName = HtmlHelper::nameToArray($fieldName);
$sliceLength = count($parentFormName) - $level * 2;
if ($sliceLength <= 1) {
return $parentFormName[0];
}
$parentFormName = array_slice($parentFormName, 0, $sliceLength);
$parentFormNameFirst = array_shift($parentFormName);
return $parentFormNameFirst.'['.implode('][', $parentFormName).']';
}
/**
* If $string begins with any number of consecutive symbols,
* returns the number, otherwise returns 0
*
* @param string $string
* @param string $symbol
* @return int
*/
protected function getNumberOfPrecedingSymbols($string, $symbol) {
return strlen($string) - strlen(ltrim($string, $symbol));
}
/**
* Adds attributes used specifically by the Input Preset API
* @param array $attributes