Viewing file:  SlideshowPluginSlideshowStylesheet.php (6.53 KB) -rw-rw-rw-
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<?php
/**
* SlideshowPluginSlideshowStylesheet handles the loading of the slideshow's stylesheets.
*
* @since 2.2.8
* @author Stefan Boonstra
*/
class SlideshowPluginSlideshowStylesheet
{
/** @var bool $allStylesheetsRegistered */
public static $allStylesheetsRegistered = false;
/**
* Initializes the SlideshowPluginSlideshowStylesheet class
*
* @since 2.2.12
*/
public static function init()
{
add_action('wp_enqueue_scripts', array(__CLASS__, 'enqueueFrontendStylesheets'));
}
/**
* Enqueue stylesheet
*/
public static function enqueueFrontendStylesheets()
{
if (SlideshowPluginGeneralSettings::getStylesheetLocation() === 'head')
{
// Register functional stylesheet
wp_enqueue_style(
'slideshow-jquery-image-gallery-stylesheet_functional',
SlideshowPluginMain::getPluginUrl() . '/style/SlideshowPlugin/functional.css',
array(),
SlideshowPluginMain::$version
);
// Get default and custom stylesheets
$stylesheets = SlideshowPluginGeneralSettings::getStylesheets(true, true);
$defaultStylesheets = $stylesheets['default'];
$customStylesheets = $stylesheets['custom'];
// Clean the '.css' extension from the default stylesheets
foreach ($defaultStylesheets as $defaultStylesheetKey => $defaultStylesheetValue)
{
$newDefaultStylesheetKey = str_replace('.css', '', $defaultStylesheetKey);
$defaultStylesheets[$newDefaultStylesheetKey] = $defaultStylesheetValue;
if ($defaultStylesheetKey !== $newDefaultStylesheetKey)
{
unset($defaultStylesheets[$defaultStylesheetKey]);
}
}
// Enqueue stylesheets
foreach (array_merge($defaultStylesheets, $customStylesheets) as $stylesheetKey => $stylesheetValue)
{
wp_enqueue_style(
'slideshow-jquery-image-gallery-ajax-stylesheet_' . $stylesheetKey,
admin_url('admin-ajax.php?action=slideshow_jquery_image_gallery_load_stylesheet&style=' . $stylesheetKey, 'admin'),
array(),
$stylesheetValue['version']
);
}
self::$allStylesheetsRegistered = true;
}
}
/**
* Enqueues a stylesheet based on the stylesheet's name. This can either be a default stylesheet or a custom one.
* If the name parameter is left unset, the default stylesheet will be used.
*
* Returns the name and version number of the stylesheet that's been enqueued, as this can be different from the
* name passed. This can be this case if a stylesheet does not exist and a default stylesheet is enqueued.
*
* @param string $name (optional, defaults to null)
* @return array [$name, $version]
*/
public static function enqueueStylesheet($name = null)
{
if (self::isCustomStylesheet($name))
{
$version = get_option($name . '_version', SlideshowPluginMain::$version);
if (!self::$allStylesheetsRegistered)
{
wp_enqueue_style(
'slideshow-jquery-image-gallery-ajax-stylesheet_' . $name,
admin_url('admin-ajax.php?action=slideshow_jquery_image_gallery_load_stylesheet&style=' . $name, 'admin'),
array(),
$version
);
}
}
else
{
$name = str_replace('.css', '', $name);
$version = SlideshowPluginMain::$version;
if (!self::$allStylesheetsRegistered)
{
wp_enqueue_style(
'slideshow-jquery-image-gallery-stylesheet_' . $name,
SlideshowPluginMain::getPluginUrl() . '/css/' . $name . '.css',
array(),
$version
);
}
}
return array($name, $version);
}
/**
* Called through WordPress' admin-ajax.php script, registered in the SlideshowPluginAJAX class. This function
* must not be called on itself.
*
* Uses the loadStylesheet function to load the stylesheet passed in the URL data. If no stylesheet name is set, all
* stylesheets will be loaded.
*
* Headers are set to allow file caching.
*
* @since 2.2.11
*/
public static function loadStylesheetByAJAX()
{
$styleName = filter_input(INPUT_GET, 'style', FILTER_SANITIZE_SPECIAL_CHARS);
// If no style name is set, all stylesheets will be loaded.
if (isset($styleName) &&
!empty($styleName) &&
strlen($styleName) > 0)
{
$stylesheet = self::getStylesheet($styleName);
}
else
{
return;
}
// Exit if headers have already been sent
if (headers_sent())
{
return;
}
// Set header to CSS. Cache for a year (as WordPress does)
header('Content-Type: text/css; charset=UTF-8');
header('Expires: ' . gmdate("D, d M Y H:i:s", time() + 31556926) . ' GMT');
header('Pragma: cache');
header("Cache-Control: public, max-age=31556926");
echo $stylesheet;
die;
}
/**
* Gets the stylesheet with the parsed style name, then returns it.
*
* @since 2.2.8
* @param string $styleName
* @return string $stylesheet
*/
public static function getStylesheet($styleName)
{
// Check if $styleName is a custom stylesheet
if (self::isCustomStylesheet($styleName))
{
// Get custom stylesheet
$stylesheet = get_option($styleName, '');
}
else
{
$stylesheetFile = SlideshowPluginMain::getPluginPath() . DIRECTORY_SEPARATOR . 'style' . DIRECTORY_SEPARATOR . 'SlideshowPlugin' . DIRECTORY_SEPARATOR . $styleName . '.css';
if (!file_exists($stylesheetFile))
{
$stylesheetFile = SlideshowPluginMain::getPluginPath() . DIRECTORY_SEPARATOR . 'style' . DIRECTORY_SEPARATOR . 'SlideshowPlugin' . DIRECTORY_SEPARATOR . 'style-light.css';
}
// Get contents of stylesheet
ob_start();
include($stylesheetFile);
$stylesheet = ob_get_clean();
}
// Replace the URL placeholders with actual URLs and add a unique identifier to separate stylesheets
$stylesheet = str_replace('%plugin-url%', SlideshowPluginMain::getPluginUrl(), $stylesheet);
$stylesheet = str_replace('%site-url%', get_bloginfo('url'), $stylesheet);
$stylesheet = str_replace('%stylesheet-url%', get_stylesheet_directory_uri(), $stylesheet);
$stylesheet = str_replace('%template-url%', get_template_directory_uri(), $stylesheet);
$stylesheet = str_replace('.slideshow_container', '.slideshow_container_' . $styleName, $stylesheet);
return $stylesheet;
}
/**
* Checks if the passed $styleName is a custom stylesheet or not.
*
* @since 2.2.23
* @param string $styleName
* @return boolean $isCustomStyle
*/
public static function isCustomStylesheet($styleName)
{
// Get array of custom style keys and check if $styleName is in this array
return in_array($styleName, array_keys(get_option(SlideshowPluginGeneralSettings::$customStyles, array())));
}
}
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