advagg_css_cdn.module

<?php


/**
 * @file
 * Advanced aggregation js cdn module.
 */

/**
 * @addtogroup default_variables
 * @{
 */

/**
 * Default value to see if jquery-ui should be grabbed from the Google CDN.
 */
define('ADVAGG_CSS_CDN_JQUERY_UI', TRUE);

/**
 * Default jquery ui version.
 */
define('ADVAGG_CSS_CDN_JQUERY_UI_VERSION', '1.8.7');

/**
 * @} End of "addtogroup default_variables".
 */

/**
 * @addtogroup hooks
 * @{
 */

/**
 * Implements hook_css_alter().
 */
function advagg_css_cdn_css_alter(&$css) {
    // Only modify if jquery_update is not enabled.
    if (module_exists('jquery_update')) {
        return;
    }
    // Setup variables.
    // jquery ui.
    $jquery_ui_version = variable_get('advagg_css_cdn_jquery_ui_version', ADVAGG_CSS_CDN_JQUERY_UI_VERSION);
    $ui_mapping = advagg_css_cdn_get_ui_mapping();
    foreach ($css as $name => $values) {
        // Only modify if
        // advagg_css_cdn_jquery_ui is enabled,
        // name is in the $ui_mapping array.
        // and type is file.
        if (variable_get('advagg_css_cdn_jquery_ui', ADVAGG_CSS_CDN_JQUERY_UI) && array_key_exists($name, $ui_mapping) && $css[$name]['type'] === 'file') {
            $css[$name]['data'] = '//ajax.googleapis.com/ajax/libs/jqueryui/' . $jquery_ui_version . '/themes/base/jquery.' . $ui_mapping[$name] . '.css';
            $css[$name]['type'] = 'external';
            // Fallback does not work do to
            // "SecurityError: The operation is insecure.".
        }
    }
}

/**
 * @} End of "addtogroup hooks".
 */

/**
 * @addtogroup advagg_hooks
 * @{
 */

/**
 * Implements hook_advagg_css_groups_alter().
 */
function advagg_css_cdn_advagg_css_groups_alter(&$css_groups, $preprocess_css) {
    // Work around a bug with seven_css_alter.
    // http://drupal.org/node/1937860
    $theme_keys[] = $GLOBALS['theme'];
    if (!empty($GLOBALS['base_theme_info'])) {
        foreach ($GLOBALS['base_theme_info'] as $base) {
            $theme_keys[] = $base->name;
        }
    }
    $match = FALSE;
    foreach ($theme_keys as $name) {
        if ($name === 'seven') {
            $match = TRUE;
        }
    }
    if (empty($match)) {
        return;
    }
    $target = FALSE;
    $last_group = FALSE;
    $last_key = FALSE;
    $kill_key = FALSE;
    $replaced = FALSE;
    foreach ($css_groups as $key => $group) {
        if (empty($target)) {
            if ($group['type'] === 'external' && $group['preprocess'] && $preprocess_css) {
                foreach ($group['items'] as $k => $value) {
                    if ($value['data'] === 'themes/seven/jquery.ui.theme.css') {
                        // Type should be file and not external (core bug).
                        $value['type'] = 'file';
                        $target = $value;
                        unset($css_groups[$key]['items'][$k]);
                        if (empty($css_groups[$key]['items'])) {
                            unset($css_groups[$key]);
                            $kill_key = $key;
                        }
                    }
                }
            }
        }
        else {
            $diff = array_merge(array_diff_assoc($group['browsers'], $target['browsers']), array_diff_assoc($target['browsers'], $group['browsers']));
            if ($group['type'] != $target['type'] || $group['group'] != $target['group'] || $group['every_page'] != $target['every_page'] || $group['media'] != $target['media'] || $group['media'] != $target['media'] || $group['preprocess'] != $target['preprocess'] || !empty($diff)) {
                if (!empty($last_group)) {
                    $diff = array_merge(array_diff_assoc($last_group['browsers'], $target['browsers']), array_diff_assoc($target['browsers'], $last_group['browsers']));
                    if ($last_group['type'] != $target['type'] || $last_group['group'] != $target['group'] || $last_group['every_page'] != $target['every_page'] || $last_group['media'] != $target['media'] || $last_group['media'] != $target['media'] || $last_group['preprocess'] != $target['preprocess'] || !empty($diff)) {
                        // Insert New.
                        $css_groups[$kill_key] = array(
                            'group' => $target['group'],
                            'type' => $target['type'],
                            'every_page' => $target['every_page'],
                            'media' => $target['media'],
                            'preprocess' => $target['preprocess'],
                            'browsers' => $target['browsers'],
                            'items' => array(
                                $target,
                            ),
                        );
                        $replaced = TRUE;
                    }
                    else {
                        // Insert above.
                        $css_groups[$last_key]['items'][] = $target;
                        $replaced = TRUE;
                    }
                }
            }
            else {
                // Insert below.
                array_unshift($css_groups[$key]['items'], $target);
                $replaced = TRUE;
            }
        }
        $last_group = $group;
        $last_key = $key;
        if ($replaced) {
            break;
        }
    }
    ksort($css_groups);
}

/**
 * @} End of "addtogroup advagg_hooks".
 */

/**
 * Return an array of jquery ui files.
 */
function advagg_css_cdn_get_ui_mapping() {
    // Replace jQuery UI's CSS, beginning by defining the mapping.
    $ui_mapping = array(
        'misc/ui/jquery.ui.accordion.css' => 'ui.accordion',
        'misc/ui/jquery.ui.autocomplete.css' => 'ui.autocomplete',
        'misc/ui/jquery.ui.button.css' => 'ui.button',
        'misc/ui/jquery.ui.core.css' => 'ui.core',
        'misc/ui/jquery.ui.datepicker.css' => 'ui.datepicker',
        'misc/ui/jquery.ui.dialog.css' => 'ui.dialog',
        'misc/ui/jquery.ui.progressbar.css' => 'ui.progressbar',
        'misc/ui/jquery.ui.resizable.css' => 'ui.resizable',
        'misc/ui/jquery.ui.selectable.css' => 'ui.selectable',
        'misc/ui/jquery.ui.slider.css' => 'ui.slider',
        'misc/ui/jquery.ui.tabs.css' => 'ui.tabs',
        'misc/ui/jquery.ui.theme.css' => 'ui.theme',
    );
    return $ui_mapping;
}