/**
* Uses regex to find css declarations containing background images to include in sprite
*
* @param string $sCss Aggregated css file
* @return array Array of css declarations and image urls to replace with sprite
*/
public function processCssUrls($sCss, $bBackend = FALSE)
{
//JCH_DEBUG ? JchPlatformProfiler::mark('beforeProcessCssUrls plgSystem (JCH Optimize)') : null;
$params = $this->params;
$aRegexStart = array();
$aRegexStart[0] = '
#(?:{
(?=\\s*+(?>[^}\\s:]++[:\\s]++)*?url\\(
(?=[^)]+\\.(?:png|gif|jpe?g))
([^)]+)\\))';
$aRegexStart[1] = '
(?=\\s*+(?>[^}\\s:]++[:\\s]++)*?no-repeat)';
$aRegexStart[2] = '
(?(?=\\s*(?>[^};]++[;\\s]++)*?background(?:-position)?\\s*+:\\s*+(?:[^;}\\s]++[^}\\S]++)*?
(?<p>(?:[tblrc](?:op|ottom|eft|ight|enter)|-?[0-9]+(?:%|[c-x]{2})?))(?:\\s+(?&p))?)
(?=\\s*(?>[^};]++[;\\s]++)*?background(?:-position)?\\s*+:\\s*+(?>[^;}\\s]++[\\s]++)*?
(?:left|top|0(?:%|[c-x]{2})?)\\s+(?:left|top|0(?:%|[c-x]{2})?)
)
)';
$sRegexMiddle = '
[^{}]++} )';
$sRegexEnd = '#isx';
$aIncludeImages = JchOptimize::getArray($params->get('csg_include_images'));
$aExcludeImages = JchOptimize::getArray($params->get('csg_exclude_images'));
$sIncImagesRegex = '';
if (!empty($aIncludeImages[0])) {
foreach ($aIncludeImages as &$sImage) {
$sImage = preg_quote($sImage, '#');
}
$sIncImagesRegex .= '
|(?:{
(?=\\s*+(?>[^}\\s:]++[:\\s]++)*?url';
$sIncImagesRegex .= ' (?=[^)]* [/(](?:' . implode('|', $aIncludeImages) . ')\\))';
$sIncImagesRegex .= '\\(([^)]+)\\)
)
[^{}]++ })';
}
$sExImagesRegex = '';
if (!empty($aExcludeImages[0])) {
$sExImagesRegex .= '(?=\\s*+(?>[^}\\s:]++[:\\s]++)*?url\\(
[^)]++ (?<!';
foreach ($aExcludeImages as &$sImage) {
$sImage = preg_quote($sImage, '#');
}
$sExImagesRegex .= implode('|', $aExcludeImages) . ')\\)
)';
}
$sRegexStart = implode('', $aRegexStart);
$sRegex = $sRegexStart . $sExImagesRegex . $sRegexMiddle . $sIncImagesRegex . $sRegexEnd;
if (preg_match_all($sRegex, $sCss, $aMatches) === FALSE) {
throw new Exception(JchPlatformUtility::translate('Error occurred matching for images to sprite'));
}
if (isset($aMatches[3])) {
$total = count($aMatches[1]);
for ($i = 0; $i < $total; $i++) {
$aMatches[1][$i] = trim($aMatches[1][$i]) ? $aMatches[1][$i] : $aMatches[3][$i];
}
}
if ($bBackend) {
$aImages = array();
$aImagesMatches = array();
$aImgRegex = array();
$aImgRegex[0] = $aRegexStart[0];
$aImgRegex[2] = $aRegexStart[1];
$aImgRegex[4] = $sRegexMiddle;
$aImgRegex[5] = $sRegexEnd;
$sImgRegex = implode('', $aImgRegex);
if (preg_match_all($sImgRegex, $sCss, $aImagesMatches) === FALSE) {
throw new Exception(JchPlatformUtility::translate('Error occurred matching for images to include'));
}
$aImagesMatches[0] = array_diff($aImagesMatches[0], $aMatches[0]);
$aImagesMatches[1] = array_diff($aImagesMatches[1], $aMatches[1]);
$oCssSpriteGen = new CssSpriteGen($this->getImageLibrary(), $this->params, $bBackend);
$aImages['include'] = $oCssSpriteGen->CreateSprite($aImagesMatches[1]);
$aImages['exclude'] = $oCssSpriteGen->CreateSprite($aMatches[1]);
return $aImages;
}
//JCH_DEBUG ? JchPlatformProfiler::mark('afterProcessCssUrls plgSystem (JCH Optimize)') : null;
return $aMatches;
}
/**
* Uses regex to find css declarations containing background images to include in sprite
*
* @param string $sCss Aggregated css file
* @return array Array of css declarations and image urls to replace with sprite
*/
public function processCssUrls($sCss, $bBackend = FALSE)
{
$params = $this->params;
$aRegexStart = array();
$aRegexStart[0] = '
#(?:{
(?=\\s*+(?>[^}\\s:]++[:\\s]++)*?url\\(
(?=[^)]+\\.(?:png|gif|jpe?g))
([^)]+)\\))';
$aRegexStart[1] = '
(?=\\s*+(?>[^}\\s:]++[:\\s]++)*?no-repeat)';
$aRegexStart[2] = '
(?(?=\\s*(?>[^};]++[;\\s]++)*?background(?:-position)?\\s*+:\\s*+(?:[^;}\\s]++[^}\\S]++)*?
(?<p>(?:[tblrc](?:op|ottom|eft|ight|enter)|-?[0-9]+(?:%|[c-x]{2})?))(?:\\s+(?&p))?)
(?=\\s*(?>[^};]++[;\\s]++)*?background(?:-position)?\\s*+:\\s*+(?>[^;}\\s]++[\\s]++)*?
(?:left|top|0(?:%|[c-x]{2})?)\\s+(?:left|top|0(?:%|[c-x]{2})?)
)
)';
$sRegexMiddle = '
[^{}]++} )';
$sRegexEnd = '#isx';
$aIncludeImages = JchOptimize::getArray($params->get('csg_include_images'));
$aExcludeImages = JchOptimize::getArray($params->get('csg_exclude_images'));
$sIncImagesRegex = '';
if (!empty($aIncludeImages[0])) {
foreach ($aIncludeImages as &$sImage) {
$sImage = preg_quote($sImage, '#');
}
$sIncImagesRegex .= '
|(?:{
(?=\\s*+(?>[^}\\s:]++[:\\s]++)*?url';
$sIncImagesRegex .= ' (?=[^)]* [/(](?:' . implode('|', $aIncludeImages) . ')\\))';
$sIncImagesRegex .= '\\(([^)]+)\\)
)
[^{}]++ })';
}
$sExImagesRegex = '';
if (!empty($aExcludeImages[0])) {
$sExImagesRegex .= '(?=\\s*+(?>[^}\\s:]++[:\\s]++)*?url\\(
[^)]++ (?<!';
foreach ($aExcludeImages as &$sImage) {
$sImage = preg_quote($sImage, '#');
}
$sExImagesRegex .= implode('|', $aExcludeImages) . ')\\)
)';
}
$sRegexStart = implode('', $aRegexStart);
$sRegex = $sRegexStart . $sExImagesRegex . $sRegexMiddle . $sIncImagesRegex . $sRegexEnd;
if (preg_match_all($sRegex, $sCss, $aMatches) === FALSE) {
throw new Exception(JText::_('Error occurred matching for images to sprite'));
}
if (isset($aMatches[3])) {
$aMatches[1] = array_merge(array_filter($aMatches[1]), array_filter($aMatches[3]));
}
if ($bBackend) {
$aImages = array();
$aImagesMatches = array();
$aImgRegex = array();
$aImgRegex[0] = $aRegexStart[0];
$aImgRegex[2] = $aRegexStart[1];
$aImgRegex[4] = $sRegexMiddle;
$aImgRegex[5] = $sRegexEnd;
$sImgRegex = implode('', $aImgRegex);
if (preg_match_all($sImgRegex, $sCss, $aImagesMatches) === FALSE) {
throw new Exception(JText::_('Error occurred matching for images to include'));
}
$aImagesMatches[0] = array_diff($aImagesMatches[0], $aMatches[0]);
$aImagesMatches[1] = array_diff($aImagesMatches[1], $aMatches[1]);
$aImages['include'] = $aImagesMatches;
$aImages['exclude'] = $aMatches;
return $aImages;
}
return $aMatches;
}
/**
* Generates regex for excluding components set in plugin params
*
* @param string $param
* @return string
*/
protected function getExCompRegex($sExComParam)
{
$aComponents = array_filter(JchOptimize::getArray($sExComParam));
$aExComp = array();
if (!empty($aComponents)) {
$aExComp = array_map(function ($sValue) {
return $sValue . '/';
}, $aComponents);
}
return $aExComp;
}
