/**
* Smarty truncate modifier plugin
*
* Type: modifier<br>
* Name: truncate<br>
* Purpose: Truncate a string to a certain length if necessary,
* optionally splitting in the middle of a word, and
* appending the $etc string or inserting $etc into the middle.
* @link http://smarty.php.net/manual/en/language.modifier.truncate.php
* truncate (Smarty online manual)
* @author Monte Ohrt <monte at ohrt dot com>
* @param string
* @param integer
* @param string
* @param boolean
* @param boolean
* @return string
*/
function smarty_modifier_truncate($string, $length = 80, $etc = '...', $break_words = false, $middle = false)
{
if ($length == 0) {
return '';
}
$ansi_as = 2;
if (strlen_ansi($string, Smarty::$_CHARSET, $ansi_as) > $length) {
$length -= min($length, strlen_ansi($etc, Smarty::$_CHARSET, $ansi_as));
if (!$break_words && !$middle) {
$string = preg_replace('/\\s+?(\\S+)?$/', '', substr_ansi($string, 0, $length + 1, Smarty::$_CHARSET, $ansi_as));
}
if (!$middle) {
return substr_ansi($string, 0, $length, Smarty::$_CHARSET, $ansi_as) . $etc;
} else {
return substr_ansi($string, 0, $length / 2, Smarty::$_CHARSET, $ansi_as) . $etc . substr_ansi($string, -$length / 2, 0, Smarty::$_CHARSET, $ansi_as);
}
} else {
return $string;
}
}
/**
* Get the size of an attribute.
*
* @param string $attribute
* @param mixed $value
* @return mixed
*/
protected function getSize($attribute, $value)
{
$hasNumeric = $this->hasRule($attribute, $this->numericRules);
// This method will determine if the attribute is a number, string, or file and
// return the proper size accordingly. If it is a number, then number itself
// is the size. If it is a file, we take kilobytes, and for a string the
// entire length of the string will be considered the attribute size.
if (is_numeric($value) && $hasNumeric) {
return array_get($this->data, $attribute);
} elseif (is_array($value)) {
return count($value);
} elseif ($value instanceof File) {
return $value->getSize() / 1024;
}
//宽字节按照字体的几个宽度计算，比如「微软雅黑」下，汉字占据两个显示宽度
$rule = $this->getRule($attribute, 'Ansi');
$ansiWidth = empty($rule) || empty($rule[1]) ? 1 : intval($rule[1][0]);
return strlen_ansi($value, NULL, $ansiWidth);
//return mb_strlen($value);
}