/**
* Chop up any local CSS files that are too big and add an IE conditional
*
* @param string $strBuffer
* @param string $strTemplate
*
* @return string $strBuffer
*/
public function run($strBuffer, $strTemplate)
{
$ua = \Environment::get('agent');
if (stripos($strTemplate, 'fe_') !== false && $ua->browser == 'ie') {
$objDOM = new \DOMDocument();
$objDOM->loadHTML($strBuffer);
$objCSSLinks = $objDOM->getElementsByTagName('link');
foreach ($objCSSLinks as $link) {
//Local files only
if (strpos($link->getAttribute('href'), 'assets/css/') !== false) {
//Replace ASSETS_URL
$strFile = str_replace(TL_ASSETS_URL, '', $link->getAttribute('href'));
$objFile = new \File($strFile);
$strContent = $objFile->getContent();
//Split up into chunklets
$splitter = new Splitter();
$count = $splitter->countSelectors($strContent) - 4095;
if ($count > 0) {
$part = 2;
for ($i = $count; $i > 0; $i -= 4095) {
$strFilename = 'assets/css/' . $objFile->filename . '-ie9-' . $part . '.css';
if (!file_exists(TL_ROOT . '/' . $strFilename)) {
//Write content
$strChunkContent = $splitter->split($strContent, $part);
$objNewFile = new \File($strFilename);
$objNewFile->write($strChunkContent);
$objNewFile->close();
}
//Add IE Conditional
foreach ($objDOM->getElementsByTagName('head') as $head) {
$strComment = '[if lte IE 9]><link rel="stylesheet" href="';
$strComment .= TL_ASSETS_URL . $strFilename . '"><![endif]';
$objChildNode = new \DOMComment($strComment);
$head->appendChild($objChildNode);
}
$part++;
}
}
}
}
$strBuffer = $objDOM->saveHTML();
}
return $strBuffer;
}
/**
* @dataProvider provideCssFilesAndCounts
*/
public function testCountSelectors($css, $expectedCount)
{
$splitter = new Splitter();
self::assertEquals($expectedCount, $splitter->countSelectors($css));
}
/**
* @dataProvider provideCssFilesAndCounts
*/
public function testCountSelectorsWorksWithCachedCss($css, $expectedCount)
{
$splitter = new Splitter($css);
self::assertEquals($expectedCount, $splitter->countSelectors());
}
