/**
* Is this insertion spot right before or after a disallowed element?
*
* Loops through each of the "from_element" defined at speed bump
* registration, and blocks insertion if either the previous or following
* paragraph contains any of them.
*
* To add additional element constraints, you must define your own element
* class which implements the method `paragraph_not_contains_element`.
* The class name will be the uppercased version of the string passed in
* from_element at speed bump registration.
*
* For example if you wanted to add an "hr" contraint, define a class at
* `\Speed_Bumps\Constraints\Elements\Hr` with has a method called
* "paragraph_not_contains_element" which checks that a string of text
* doesn't contain an `<hr>`.
*/
public static function meets_minimum_distance_from_elements($can_insert, $context, $args, $already_inserted)
{
// Support passing an integer here, which will be treated as a unit of "paragraphs"
if (is_int($args['from_element'])) {
$args['from_element'] = array('paragraphs' => $args['from_element']);
}
if (!is_array($args['from_element'])) {
return $can_insert;
}
$defaults = array_flip(array('paragraphs', 'words', 'characters'));
$base_distance_constraints = array_intersect_key($args['from_element'], $defaults);
$from_element = array_diff_key($args['from_element'], $defaults);
if (!empty($from_element)) {
foreach ($from_element as $key => $val) {
$distance_constraints = $base_distance_constraints;
if (is_int($key)) {
$element_to_check = Factory::build(ucfirst($val));
} else {
$element_to_check = Factory::build(ucfirst($key));
foreach (array('paragraphs', 'words', 'characters') as $unit) {
if (isset($val[$unit])) {
$distance_constraints[$unit] = $val[$unit];
}
}
}
foreach (array_filter($distance_constraints) as $unit => $measurement) {
$paragraphs_to_check = Text::content_within_distance_of($context['parts'], $context['index'], $unit, $measurement);
foreach ($paragraphs_to_check as $paragraph) {
if (!$element_to_check->paragraph_not_contains_element($paragraph)) {
$can_insert = false;
}
}
}
}
}
return $can_insert;
}
