advagg_js_cdn.module

<?php


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

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

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

/**
 * Default value to see if SWFObject should be grabbed from the Google CDN.
 */
define('ADVAGG_JS_CDN_SWFOBJECT', TRUE);

/**
 * Implements hook_advagg_js_pre_alter().
 */
function advagg_js_cdn_advagg_js_pre_alter(&$javascript, $preprocess_js, $public_downloads, $scope) {
    // Exit early if we are not going to CDN any code.
    $cdn_jquery = variable_get('advagg_js_cdn_jquery', ADVAGG_JS_CDN_JQUERY);
    $cdn_jquery_ui = variable_get('advagg_js_cdn_jquery_ui', ADVAGG_JS_CDN_JQUERY_UI);
    $cdn_swfobject = variable_get('advagg_js_cdn_swfobject', ADVAGG_JS_CDN_SWFOBJECT);
    if (!$cdn_jquery && !$cdn_jquery_ui && !$cdn_swfobject) {
        return FALSE;
    }
    // Set filepaths/versions
    $jquery_version = variable_get('advagg_js_cdn_jquery_version', '1.2.6');
    $jquery_filepath = 'misc/jquery.js';
    if (module_exists('jquery_update') && variable_get('jquery_update_replace', TRUE)) {
        // jquery_update_get_version hits disk and doesn't get cached.
        // advagg_js_cdn_advagg_js_pre_alter will run mutiple times per request so
        // caching the value of $jquery_update_version here.
        static $jquery_update_version;
        if (empty($jquery_update_version)) {
            $jquery_update_version = variable_get('advagg_js_cdn_jquery_update_version', jquery_update_get_version());
        }
        $jquery_update_filepath = drupal_get_path('module', 'jquery_update');
    }
    if (module_exists('jquery_ui')) {
        // jquery_ui_get_version hits disk and doesn't get cached.
        // advagg_js_cdn_advagg_js_pre_alter will run mutiple times per request so
        // caching the value of jquery_ui_get_version here.
        static $jquery_ui_version;
        if (empty($jquery_ui_version)) {
            $jquery_ui_version = jquery_ui_get_version();
        }
        $jquery_ui_filepath = advagg_js_cdn_get_jquery_ui_filename();
    }
    if (module_exists('swftools')) {
        $swfobject_version = variable_get('advagg_js_cdn_swfobject_version', '2.2');
        if (function_exists('swftools_get_player_path')) {
            $swfobject_filepath = swftools_get_player_path() . '/swfobject2/swfobject.js';
        }
        elseif (function_exists('swftools_get_library')) {
            $swfobject_filepath = swftools_get_library('swfobject') . '/swfobject.js';
        }
    }
    // http or https.
    $schema = advagg_get_server_schema();
    foreach ($javascript as $type => $data) {
        // Skip inline and setting js.
        if (!$data || $type == 'setting' || $type == 'inline') {
            continue;
        }
        // Search and replace.
        foreach ($data as $path => $info) {
            // jquery.js
            if ($cdn_jquery) {
                if (isset($jquery_update_filepath) && ($path == $jquery_update_filepath . '/replace/jquery.min.js' || $path == $jquery_filepath . '/replace/jquery.js')) {
                    $info['preprocess'] = FALSE;
                    $javascript['external'][$schema . '://ajax.googleapis.com/ajax/libs/jquery/' . $jquery_update_version . '/jquery.min.js'] = $info;
                    unset($javascript[$type][$path]);
                }
                elseif ($path == $jquery_filepath) {
                    $info['preprocess'] = FALSE;
                    $javascript['external'][$schema . '://ajax.googleapis.com/ajax/libs/jquery/' . $jquery_version . '/jquery.min.js'] = $info;
                    unset($javascript[$type][$path]);
                }
            }
            // jquery-ui.js
            if ($cdn_jquery_ui) {
                if (isset($jquery_ui_filepath) && isset($jquery_ui_version) && $path == $jquery_ui_filepath) {
                    $info['preprocess'] = FALSE;
                    $javascript['external'][$schema . '://ajax.googleapis.com/ajax/libs/jqueryui/' . $jquery_ui_version . '/jquery-ui.min.js'] = $info;
                    unset($javascript[$type][$path]);
                }
            }
            // swfobject.js
            if ($cdn_swfobject) {
                if (isset($swfobject_filepath) && $path == $swfobject_filepath) {
                    $info['preprocess'] = FALSE;
                    $javascript['external'][$schema . '://ajax.googleapis.com/ajax/libs/swfobject/' . $swfobject_version . '/swfobject.js'] = $info;
                    unset($javascript[$type][$path]);
                }
            }
        }
    }
}

/**
 * Get the path for the jquery-ui.js file.
 *
 * @param string $file
 *   filename.
 */
function advagg_js_cdn_get_jquery_ui_filename($file = 'jquery-ui') {
    $jquery_ui_path_const = 'JQUERY_UI_PATH';
    if (!defined($jquery_ui_path_const)) {
        if (!function_exists('jquery_ui_get_path')) {
            return FALSE;
        }
        $jquery_ui_path = jquery_ui_get_path();
        if ($jquery_ui_path === FALSE) {
            return FALSE;
        }
    }
    else {
        $jquery_ui_path = constant($jquery_ui_path_const);
    }
    $jquery_ui_path .= '/ui';
    $compression = variable_get('jquery_update_compression_type', 'mini');
    switch ($compression) {
        case 'none':
            $file_path = "{$file}.js";
            break;
        case 'pack':
            $file_path = "packed/{$file}.packed.js";
            break;
        case 'mini':
        default:
            $file_path = "minified/{$file}.min.js";
            break;
    }
    $js_path = $jquery_ui_path . '/' . $file_path;
    return $js_path;
}