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<?php
/**
* TActiveControlAdapter and TCallbackPageStateTracker class file.
*
* @author Wei Zhuo <weizhuo[at]gamil[dot]com>
* @link http://www.pradosoft.com/
* @copyright Copyright © 2005-2014 PradoSoft
* @license http://www.pradosoft.com/license/
* @package Prado\Web\UI\ActiveControls
*/
namespace Prado\Web\UI\ActiveControls;
/**
* TStyleDiff class.
*
* Calculates the changes to the Style properties.
*
* @author Wei Zhuo <weizhuo[at]gmail[dot]com>
* @package Prado\Web\UI\ActiveControls
* @since 3.1
*/
class TStyleDiff extends TViewStateDiff
{
/**
* @param TStyle control style
* @return array all the style properties combined.
*/
protected function getCombinedStyle($obj)
{
if(!($obj instanceof TStyle))
return array();
$style = $obj->getStyleFields();
$style = array_merge($style,$this->getStyleFromString($obj->getCustomStyle()));
if($obj->hasFont())
$style = array_merge($style, $this->getStyleFromString($obj->getFont()->toString()));
return $style;
}
/**
* @param string CSS custom style string.
* @param array CSS style as name-value array.
*/
protected function getStyleFromString($string)
{
$style = array();
if(!is_string($string)) return $style;
foreach(explode(';',$string) as $sub)
{
$arr=explode(':',$sub);
if(isset($arr[1]) && trim($arr[0])!=='')
$style[trim($arr[0])] = trim($arr[1]);
}
return $style;
}
/**
* @return string changes to the CSS class name.
*/
protected function getCssClassDiff()
{
if($this->_old===null)
{
return ($this->_new!==null) && $this->_new->hasCssClass()
? $this->_new->getCssClass() : null;
}
else
{
return $this->_old->getCssClass() !== $this->_new->getCssClass() ?
$this->_new->getCssClass() : null;
}
}
/**
* @return array list of changes to the control style.
*/
protected function getStyleDiff()
{
$diff = array_diff_assoc(
$this->getCombinedStyle($this->_new),
$this->getCombinedStyle($this->_old));
return count($diff) > 0 ? $diff : null;
}
/**
* @return array list of changes to the control style and CSS class name.
*/
public function getDifference()
{
if($this->_new===null)
return $this->_null;
else
{
$css = $this->getCssClassDiff();
$style = $this->getStyleDiff();
if(($css!==null) || ($style!==null))
return array('CssClass' => $css, 'Style' => $style);
else
$this->_null;
}
}
}
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