'. t('Enable parallel downloads on the Performance settings page.', array('@performance' => url('admin/settings/performance'))) .'';
return $output;
}
}
/**
* Implementation of hook_form_alter().
*
* @param &$form
* Nested array of form elements that comprise the form.
* @param $form_state
* A keyed array containing the current state of the form.
* @param $form_id
* String representing the name of the form itself. Typically this is the name of the function that generated the form.
*/
function parallel_form_alter(&$form, $form_state, $form_id) {
if ($form_id == 'system_performance_settings') {
$form['bandwidth_optimizations']['parallel_enabled'] = array(
'#type' => 'checkbox',
'#title' => t('Enable Parallel'),
'#default_value' => variable_get('parallel_enabled', TRUE),
'#weight' => -20,
);
$form['bandwidth_optimizations']['parallel_exit'] = array(
'#type' => 'checkbox',
'#title' => t('Use Hook Exit For CSS Replacement'),
'#default_value' => variable_get('parallel_exit', FALSE),
'#description' => t('If your using a recolorable theme, you should probably use this.'),
'#weight' => -19,
);
$form['bandwidth_optimizations']['parallel_domain_css'] = array(
'#type' => 'textfield',
'#title' => t('Enter domain - CSS'),
'#default_value' => variable_get('parallel_domain_css', ''),
'#description' => t('//data1.example.com'),
'#weight' => -18,
);
$form['bandwidth_optimizations']['parallel_domain_js'] = array(
'#type' => 'textfield',
'#title' => t('Enter domain - JS'),
'#default_value' => variable_get('parallel_domain_js', ''),
'#description' => t('//data2.example.com'),
'#weight' => -17,
);
$form['bandwidth_optimizations']['parallel_domain_img'] = array(
'#type' => 'textfield',
'#title' => t('Enter domain - IMG'),
'#default_value' => variable_get('parallel_domain_img', ''),
'#description' => t('//data3.example.com'),
'#weight' => -16,
);
}
}
/**
* Implementation of hook_theme_registry_alter().
*
* Make Parallel's page preprocess function run *after* everything else's,
* so that a theme can't call drupal_get_js() and mess everything up.
*
* @param &$theme_registry
* The entire cache of theme registry information, post-processing.
*/
function parallel_theme_registry_alter(&$theme_registry) {
if (isset($theme_registry['page'])) {
// If parallel's preprocess function is there already, remove it.
if ($key = array_search('parallel_preprocess_page', $theme_registry['page']['preprocess functions'])) {
unset($theme_registry['page']['preprocess functions'][$key]);
}
// Now tack it on at the end so it runs after everything else.
$theme_registry['page']['preprocess functions'][] = 'parallel_preprocess_page';
}
}
/**
* Implementation of template_preprocess_page().
*
* @param &$variables
* Array containing various page elements.
*/
function parallel_preprocess_page(&$variables) {
if (variable_get('parallel_enabled', TRUE)) {
if (variable_get('parallel_domain_css', '') != '') {
$variables['styles'] = str_replace(' href="/', ' href="' . variable_get('parallel_domain_css', '') . '/', $variables['styles']);
}
if (variable_get('parallel_domain_js', '') != '') {
$variables['scripts'] = str_replace(' src="/', ' src="' . variable_get('parallel_domain_js', '') . '/', $variables['scripts']);
$variables['closure'] = str_replace(' src="/', ' src="' . variable_get('parallel_domain_js', '') . '/', $variables['closure']);
}
if (variable_get('parallel_domain_img', '') != '') {
$skip_keys = array('styles', 'scripts', 'closure', 'zebra', 'id', 'directory', 'layout', 'head_title', 'base_path', 'front_page', 'head', 'body_clases');
foreach ($variables as $key => $value) {
if (!in_array($key, $skip_keys) && is_string($value) && !empty($value)) {
$variables[$key] = parallel_image_replace($value, variable_get('parallel_domain_img', ''));
}
}
}
}
}
/**
* Replace src with subdomain in html.
*
* @param $html
* String containing valid html
* @param $subdomain
* subdomain
*
* @return string
* modified html
*/
function parallel_image_replace($html, $subdomain) {
$host_re = array(
'(https?\:)?\/\/' . preg_quote($_SERVER['SERVER_NAME']) . '\/',
'(https?\:)?\/\/' . preg_quote($_SERVER['HTTP_HOST']) . '\/',
// manually add domains here
//'(https?\:)?\/\/' .preg_quote('manual.domain.com'). '\/',
);
$pattern = '/(]*\s+)src\s*=\s*(\'|")?(\/([^\/])|' . implode('|', $host_re) . ')/i';
$replacement = '$1 src=$2' . $subdomain . '/$4';
return preg_replace($pattern, $replacement, $html);
}
/**
* Implementation of hook_init().
*
* Start the output buffer.
*/
function parallel_init() {
if ( variable_get('parallel_enabled', FALSE)
&& variable_get('parallel_exit', FALSE)
&& variable_get('parallel_domain_css', '') != ''
) {
ob_start();
}
}
/**
* Implementation of hook_exit().
*
* Alt way of getting the css filenames
*/
function parallel_exit() {
// Ensure we are not serving a cached page; drupal_set_content is the first
// function in common.inc which is included in the full drupal bootstrap.
if ( variable_get('parallel_enabled', FALSE)
&& variable_get('parallel_exit', FALSE)
&& variable_get('parallel_domain_css', '') != ''
&& function_exists('drupal_set_content')
) {
$buffer = ob_get_contents();
ob_end_clean();
// Extract external css files from html document
$css_old = array();
$css = explode(' $value) {
// Only grab the first string, containing the css filename.
$css_old[$key] = '', $value)) . ' />';
$css[$key] = str_replace(' href="/', ' href="' . variable_get('parallel_domain_css', '') . '/', $css_old[$key]);
$buffer = str_replace($css_old[$key], $css[$key], $buffer);
}
watchdog('parallel', htmlentities(print_r($css_old, TRUE) . "\n\n\n\n" . print_r($css, TRUE)));
ob_start();
print $buffer;
if (variable_get('cache', CACHE_DISABLED) != CACHE_DISABLED) {
page_set_cache();
}
}
}