<?PHP
/**
* Copyright (c) 2009, Yahoo! Inc. All rights reserved.
* Code licensed under the BSD License:
* http://developer.yahoo.net/yui/license.html
* version: 1.0.0b2
*/
/**
* Used to specify JavaScript and CSS module requirements. It maintains a dependency
* tree for these modules so when a module is requested, all of the other modules it
* depends on are included as well. By default, the YUI Library is configured, and
* other modules and their dependencies can be added via PHP.
* @module phploader
*/
define('YUI_AFTER', 'after');
define('YUI_BASE', 'base');
define('YUI_CSS', 'css');
define('YUI_DATA', 'DATA');
define('YUI_DEPCACHE', 'depCache');
define('YUI_DEBUG', 'DEBUG');
define('YUI_EMBED', 'EMBED');
define('YUI_FILTERS', 'filters');
define('YUI_FULLPATH', 'fullpath');
define('YUI_FULLJSON', 'FULLJSON');
define('YUI_GLOBAL', 'global');
define('YUI_JS', 'js');
define('YUI_JSON', 'JSON');
define('YUI_MODULES', 'modules');
define('YUI_SUBMODULES', 'submodules');
define('YUI_EXPOUND', 'expound');
define('YUI_NAME', 'name');
define('YUI_OPTIONAL', 'optional');
define('YUI_OVERRIDES', 'overrides');
define('YUI_PATH', 'path');
define('YUI_PKG', 'pkg');
define('YUI_PREFIX', 'prefix');
define('YUI_PROVIDES', 'provides');
define('YUI_RAW', 'RAW');
define('YUI_REPLACE', 'replace');
define('YUI_REQUIRES', 'requires');
define('YUI_ROLLUP', 'rollup');
define('YUI_SATISFIES', 'satisfies');
define('YUI_SEARCH', 'search');
define('YUI_SKIN', 'skin');
define('YUI_SKINNABLE', 'skinnable');
define('YUI_SUPERSEDES', 'supersedes');
define('YUI_TAGS', 'TAGS');
define('YUI_TYPE', 'type');
define('YUI_URL', 'url');
/**
* The YUI PHP loader base class which provides dynamic server-side loading for YUI
* @class YAHOO_util_Loader
* @namespace PHP
*/
class YAHOO_util_Loader {
/**
* The base directory
* @property base
* @type string
* @default http://yui.yahooapis.com/[YUI VERSION]/build/
*/
var $base = "";
/**
* A filter to apply to result urls. This filter will modify the default path for
* all modules. The default path is the minified version of the files (e.g., event-min.js).
* Changing the filter alows for picking up the unminified (raw) or debug sources.
* The default set of valid filters are: YUI_DEBUG & YUI_RAW
* @property filter
* @type string (e.g.)
* @default empty string (minified vesion)
*/
var $filter = "";
/**
* An array of filters & filter replacement rules. Used with $filter.
* @property filters
* @type array
* @default
*/
var $filters = array();
/**
* A list of modules to apply the filter to. If not supplied, all
* modules will have any defined filters applied. Tip: Useful for debugging.
* @property filterList
* @type array
* @default null
*/
var $filterList = null;
/**
* Should we allow rollups
* @property allowRollups
* @type boolean
* @default true
*/
var $allowRollups = true;
/**
* Whether or not to load optional dependencies for the requested modules
* @property loadOptional
* @type boolean
* @default false
*/
var $loadOptional = false;
/**
* Force rollup modules to be sorted as moved to the top of
* the stack when performing an automatic rollup. This has a very small performance consequence.
* @property rollupsToTop
* @type boolean
* @default false
*/
var $rollupsToTop = false;
/**
* The first time we output a module type we allow automatic rollups, this
* array keeps track of module types we have processed
* @property processedModuleTypes
* @type array
* @default
*/
var $processedModuleTypes = array();
/**
* All required modules
* @property requests
* @type array
* @default
*/
var $requests = array();
/**
* List of modules that have been been outputted via getLink() / getComboLink()
* @property loaded
* @type array
* @default
*/
var $loaded = array();
/**
* List of all modules superceded by the list of required modules
* @property superceded
* @type array
* @default
*/
var $superceded = array();
/**
* Keeps track of modules that were requested that are not defined
* @property undefined
* @type array
* @default
*/
var $undefined = array();
/**
* Used to determine if additional sorting of dependencies is required
* @property dirty
* @type boolean
* @default true
*/
var $dirty = true;
/**
* List of sorted modules
* @property sorted
* @type array
* @default null
*/
var $sorted = null;
/**
* List of modules the loader has aleady accounted for
* @property accountedFor
* @type array
* @default
*/
var $accountedFor = array();
/**
* The list of required skins
* @property skins
* @type array
* @default
*/
var $skins = array();
/**
* Contains the available module metadata
* @property modules
* @type array
* @default YUI module metadata for the specified release
*/
var $modules = array();
/**
* The APC cache key
* @property fullCacheKey
* @type string
* @default null
*/
var $fullCacheKey = null;
/**
* List of modules that have had their base pathes overridden
* @property baseOverrides
* @type array
* @default
*/
var $baseOverrides = array();
/**
* Used to determine if we have an APC cache hit
* @property cacheFound
* @type boolean
* @default false
*/
var $cacheFound = false;
/**
* Used to delay caching of module data
* @property delayCache
* @type boolean
* @default false
*/
var $delayCache = false;
/* If the version is set, a querystring parameter is appended to the
* end of all generated URLs. This is a cache busting hack for environments
* that always use the same path for the current version of the library.
* @property version
* @type string
* @default null
*/
var $version = null;
var $versionKey = "_yuiversion";
/* Holds the calculated skin definition
* @property skin
* @type array
* @default
*/
var $skin = array();
/* Holds the module rollup metadata
* @property rollupModules
* @type array
* @default
*/
var $rollupModules = array();
/* Holds global module information. Used for global dependency support.
* Note: Does not appear to be in use by recent metadata. Might be deprecated?
* @property globalModules
* @type array
* @default
*/
var $globalModules = array();
/* Holds information about what modules satisfy the requirements of others
* @property satisfactionMap
* @type array
* @default
*/
var $satisfactionMap = array();
/* Holds a cached module dependency list
* @property depCache
* @type array
* @default
*/
var $depCache = array();
/**
* Combined into a single request using the combo service to pontentially reduce the number of
* http requests required. This option is not supported when loading custom modules.
* @property combine
* @type boolean
* @default false
*/
var $combine = false;
/**
* The base path to the combo service. Uses the Yahoo! CDN service by default.
* You do not have to set this property to use the combine option. YUI PHP Loader ships
* with an intrinsic, lightweight combo-handler as well (see combo.php).
* @property comboBase
* @type string
* @default http://yui.yahooapis.com/combo?
*/
var $comboBase = "http://yui.yahooapis.com/combo?";
/**
* Holds the current combo url for the loaded CSS resources. This is
* built with addToCombo and retrieved with getComboLink. Only used when the combine
* is enabled.
* @property cssComboLocation
* @type string
* @default null
*/
var $cssComboLocation = null;
/**
* Holds the current combo url for the loaded JavaScript resources. This is
* built with addToCombo and retrieved with getComboLink. Only used when the combine
* is enabled.
* @property jsComboLocation
* @type string
* @default null
*/
var $jsComboLocation = null;
/**
* The YAHOO_util_Loader class constructor
* @constructor
* @param {string} yuiVersion Defines which version of YUI metadata to load
* @param {string} cacheKey Unique APC cache key. This is combined with the YUI base
* so that updates to YUI will force a new cache entry. However, if your custom config
* changes, this key should be changed (otherwise the old values will be used until the cache expires).
* @param {array} modules A list of custom modules
* @param {boolean} noYUI Pass true if you do not want the YUI metadata
*/
function YAHOO_util_Loader($yuiVersion, $cacheKey=null, $modules=null, $noYUI=false) {
if (!isset($yuiVersion)) {
die("Error: The first parameter of YAHOO_util_Loader must specify which version of YUI to use!");
}
/*
* Include the metadata config file that corresponds to the requested YUI version
* Note: we attempt to find a prebuilt config_{version}.php file which contains an associative array,
* but if not available we'll attempt to find and parse the YUI json dependency file.
*/
$parentDir = dirname(dirname(__FILE__));
$phpConfigFile = $parentDir . '/lib/meta/config_' . $yuiVersion . '.php';
$jsonConfigFile = $parentDir . '/lib/meta/json_' . $yuiVersion . '.txt';
if (file_exists($phpConfigFile) && is_readable($phpConfigFile)) {
require($phpConfigFile);
} else if (file_exists($jsonConfigFile) && is_readable($jsonConfigFile) && function_exists('json_encode')) {
$jsonConfigString = file_get_contents($jsonConfigFile);
$inf = json_decode($jsonConfigString, true);
$GLOBALS['yui_current'] = $inf;
} else {
die("Unable to find a suitable YUI metadata file!");
}
global $yui_current;
$this->apcttl = 0;
$this->curlAvail = function_exists('curl_exec');
$this->apcAvail = function_exists('apc_fetch');
$this->jsonAvail = function_exists('json_encode');
$this->customModulesInUse = empty($modules) ? false : true;
$this->base = $yui_current[YUI_BASE];
$this->comboDefaultVersion = $yuiVersion;
$this->fullCacheKey = null;
$cache = null;
if ($cacheKey && $this->apcAvail) {
$this->fullCacheKey = $this->base . $cacheKey;
$cache = apc_fetch($this->fullCacheKey);
}
if ($cache) {
$this->cacheFound = true;
$this->modules = $cache[YUI_MODULES];
$this->skin = $cache[YUI_SKIN];
$this->rollupModules = $cache[YUI_ROLLUP];
$this->globalModules = $cache[YUI_GLOBAL];
$this->satisfactionMap = $cache[YUI_SATISFIES];
$this->depCache = $cache[YUI_DEPCACHE];
$this->filters = $cache[YUI_FILTERS];
} else {
// set up the YUI info for the current version of the lib
if ($noYUI) {
$this->modules = array();
} else {
$this->modules = $yui_current['moduleInfo'];
}
if ($modules) {
$this->modules = array_merge_recursive($this->modules, $modules);
}
$this->skin = $yui_current[YUI_SKIN];
$this->skin['overrides'] = array();
$this->skin[YUI_PREFIX] = "skin-";
$this->filters = array(
YUI_RAW => array(
YUI_SEARCH => "-min\.js",
YUI_REPLACE => ".js"
),
YUI_DEBUG => array(
YUI_SEARCH => "-min\.js",
YUI_REPLACE => "-debug.js"
)
);
foreach ($this->modules as $name=>$m) {
if (isset($m[YUI_GLOBAL])) {
$this->globalModules[$name] = true;
}
if (isset($m[YUI_SUPERSEDES])) {
$this->rollupModules[$name] = $m;
foreach ($m[YUI_SUPERSEDES] as $sup) {
$this->mapSatisfyingModule($sup, $name);
}
}
}
}
}
/**
* Used to update the APC cache
* @method updateCache
*/
function updateCache() {
if ($this->fullCacheKey) {
$cache = array();
$cache[YUI_MODULES] = $this->modules;
$cache[YUI_SKIN] = $this->skin;
$cache[YUI_ROLLUP] = $this->rollupModules;
$cache[YUI_GLOBAL] = $this->globalModules;
$cache[YUI_DEPCACHE] = $this->depCache;
$cache[YUI_SATISFIES] = $this->satisfactionMap;
$cache[YUI_FILTERS] = $this->filters;
apc_store($this->fullCacheKey, $cache, $this->apcttl);
}
}
/**
* Used to load YUI and/or custom components
* @method load
* @param string $varname [, string $... ] List of component names
*/
function load() {
//Expects N-number of named components to load
$args = func_get_args();
foreach ($args as $arg) {
$this->loadSingle($arg);
}
}
/**
* Used to mark a module type as processed
* @method setProcessedModuleType
* @param string $moduleType
*/
function setProcessedModuleType($moduleType='ALL') {
$this->processedModuleTypes[$moduleType] = true;
}
/**
* Used to determine if a module type has been processed
* @method hasProcessedModuleType
* @param string $moduleType
*/
function hasProcessedModuleType($moduleType='ALL') {
return isset($this->processedModuleTypes[$moduleType]);
}
/**
* Used to specify modules that are already on the page that should not be loaded again
* @method setLoaded
* @param string $varname [, string $... ] List of module names
*/
function setLoaded() {
$args = func_get_args();
foreach ($args as $arg) {
if (isset($this->modules[$arg])) {
$this->loaded[$arg] = $arg;
$mod = $this->modules[$arg];
$sups = $this->getSuperceded($arg);
// accounting for by way of supersede
foreach ($sups as $supname=>$val) {
$this->loaded[$supname] = $supname;
}
// prevent rollups for this module type
$this->setProcessedModuleType($mod[YUI_TYPE]);
} else {
$msg = "YUI_LOADER: undefined module name provided to setLoaded(): " . $arg;
error_log($msg, 0);
}
}
}
/**
* Sets up skin for skinnable modules
* @method skinSetup
* @param string $name module name
* @return {string}
*/
function skinSetup($name) {
$skinName = null;
$dep = $this->modules[$name];
if ($dep && isset($dep[YUI_SKINNABLE])) {
$s = $this->skin;
if (isset($s[YUI_OVERRIDES][$name])) {
foreach ($s[YUI_OVERRIDES][$name] as $name2 => $over2) {
$skinName = $this->formatSkin($over2, $name);
}
} else {
$skinName = $this->formatSkin($s["defaultSkin"], $name);
}
// adding new skin module
$this->skins[] = $skinName;
$skin = $this->parseSkin($skinName);
// module-specific
if (isset($skin[2])) {
$dep = $this->modules[$skin[2]];
$package = (isset($dep[YUI_PKG])) ? $dep[YUI_PKG] : $skin[2];
$path = $package . '/' . $s[YUI_BASE] . $skin[1] . '/' . $skin[2] . '.css';
$this->modules[$skinName] = array(
"name" => $skinName,
"type" => YUI_CSS,
"path" => $path,
"after" => $s[YUI_AFTER]
);
// rollup skin
} else {
$path = $s[YUI_BASE] . $skin[1] . '/' . $s[YUI_PATH];
$newmod = array(
"name" => $skinName,
"type" => YUI_CSS,
"path" => $path,
"rollup" => 3,
"after" => $s[YUI_AFTER]
);
$this->modules[$skinName] = $newmod;
$this->rollupModules[$skinName] = $newmod;
}
}
return $skinName;
}
/**
* Parses a module's skin. A modules skin is typically prefixed.
* @method parseSkin
* @param string $name the name of a module to parse
* @return {array}
*/
function parseSkin($moduleName) {
if (strpos( $moduleName, $this->skin[YUI_PREFIX] ) === 0) {
return explode('-', $moduleName);
}
return null;
}
/**
* Add prefix to module skin
* @method formatSkin
* @param string $skin the skin name
* @param string $moduleName the name of a module
* @return {string} prefixed skin name
*/
function formatSkin($skin, $moduleName) {
$prefix = $this->skin[YUI_PREFIX];
$s = $prefix . $skin;
if ($moduleName) {
$s = $s . '-' . $moduleName;
}
return $s;
}
/**
* Loads the requested module
* @method loadSingle
* @param string $name the name of a module to load
* @return {boolean}
*/
function loadSingle($name) {
$skin = $this->parseSkin($name);
if ($skin) {
$this->skins[] = $name;
$this->dirty = true;
return true;
}
if (!isset($this->modules[$name])) {
$this -> undefined[$name] = $name;
return false;
}
if (isset($this->loaded[$name]) || isset($this->accountedFor[$name])) {
// skip
} else {
$this->requests[$name] = $name;
$this->dirty = true;
}
return true;
}
/**
* Used to output each of the required script tags
* @method script
* @return {string}
*/
function script() {
return $this->tags(YUI_JS);
}
/**
* Used to output each of the required link tags
* @method css
* @return {string}
*/
function css() {
return $this->tags(YUI_CSS);
}
/**
* Used to output each of the required html tags (i.e.) script or link
* @method tags
* @param {string} moduleType Type of html tag to return (i.e.) js or css. Default is both.
* @param {boolean} skipSort
* @return {string}
*/
function tags($moduleType=null, $skipSort=false) {
return $this->processDependencies(YUI_TAGS, $moduleType, $skipSort);
}
/**
* Used to embed the raw JavaScript inline
* @method script_embed
* @return {string} Returns the script tag(s) with the JavaScript inline
*/
function script_embed() {
return $this->embed(YUI_JS);
}
/**
* Used to embed the raw CSS
* @method css_embed
* @return {string} (e.g.) Returns the style tag(s) with the CSS inline
*/
function css_embed() {
return $this->embed(YUI_CSS);
}
/**
* Used to output each of the required html tags inline (i.e.) script and/or style
* @method embed
* @param {string} moduleType Type of html tag to return (i.e.) js or css. Default is both.
* @param {boolean} skipSort
* @return {string} Returns the style tag(s) with the CSS inline and/or the script tag(s) with the JavaScript inline
*/
function embed($moduleType=null, $skipSort=false) {
return $this->processDependencies(YUI_EMBED, $moduleType, $skipSort);
}
/**
* Used to fetch an array of the required JavaScript components
* @method script_data
* @return {array} Returns an array of data about each of the identified JavaScript components
*/
function script_data() {
return $this->data(YUI_JS);
}
/**
* Used to fetch an array of the required CSS components
* @method css_data
* @return {array} Returns an array of data about each of the identified JavaScript components
*/
function css_data() {
return $this->data(YUI_CSS);
}
/**
* Used to output an Array which contains data about the required JavaScript & CSS components
* @method data
* @param {string} moduleType Type of html tag to return (i.e.) js or css. Default is both.
* @param {boolean} allowRollups
* @param {boolean} skipSort
* @return {string}
*/
function data($moduleType=null, $allowRollups=false, $skipSort=false) {
if (!$allowRollups) {
$this->setProcessedModuleType($moduleType);
}
$type = YUI_DATA;
return $this->processDependencies($type, $moduleType, $skipSort);
}
/**
* Used to fetch a JSON object with the required JavaScript components
* @method script_json
* @return {string} Returns a JSON object containing urls for each JavaScript component
*/
function script_json() {
return $this->json(YUI_JS);
}
/**
* Used to fetch a JSON object with the required CSS components
* @method css_json
* @return {string} Returns a JSON object containing urls for each CSS component
*/
function css_json() {
return $this->json(YUI_CSS);
}
/**
* Used to fetch a JSON object with the required JavaScript and CSS components
* @method json
* @param {string} moduleType
* @param {boolean} allowRollups
* @param {boolean} skipSort
* @param {boolean} full
* @return {string} Returns a JSON object with the required JavaScript and CSS components
*/
function json($moduleType=null, $allowRollups=false, $skipSort=false, $full=false) {
if (!$allowRollups) {
$this->setProcessedModuleType($moduleType);
}
// the original JSON output only sent the provides data, not the requires
$type = YUI_JSON;
if ($full) {
$type = YUI_FULLJSON;
}
return $this->processDependencies($type, $moduleType, $skipSort);
}
/**
* Used to produce the raw JavaScript code inline without the actual script tags
* @method script_raw
* @return {string} Returns the raw JavaScript code inline without the actual script tags
*/
function script_raw() {
return $this->raw(YUI_JS);
}
/**
* Used to produce the raw CSS code inline without the actual style tags
* @method css_raw
* @return {string} Returns the raw CSS code inline without the actual style tags
*/
function css_raw() {
return $this->raw(YUI_CSS);
}
/**
* Used to produce the raw Javacript and CSS code inline without the actual script or style tags
* @method raw
* @param {string} moduleType
* @param {boolean} allowRollups
* @param {boolean} skipSort
* @return {string} Returns the raw JavaScript and/or CSS code inline without the actual style tags
*/
function raw($moduleType=null, $allowRollups=false, $skipSort=false) {
return $this->processDependencies(YUI_RAW, $moduleType, $skipSort);
}
/**
* General logging function. Writes a message to the PHP error log.
* @method log
* @param {string} msg Message to write
*/
function log($msg) {
error_log($msg, 0);
}
/**
* Markes a module as being accounted for. Used in dependency testing.
* @method accountFor
* @param {string} name Module to mark as being accounted for
*/
function accountFor($name) {
$this->accountedFor[$name] = $name;
if (isset($this->modules[$name])) {
$dep = $this->modules[$name];
$sups = $this->getSuperceded($name);
foreach ($sups as $supname=>$val) {
// accounting for by way of supersede package
$this->accountedFor[$supname] = true;
}
}
}
/**
* Used during dependecy processing to prune modules from the list of modules requiring further processing
* @method prune
* @param {array} deps List of module dependencies
* @param {string} moduleType Type of modules to prune (i.e.) js or css
* @return {array}
*/
function prune($deps, $moduleType) {
if ($moduleType) {
$newdeps = array();
foreach ($deps as $name=>$val) {
$dep = $this->modules[$name];
if ($dep[YUI_TYPE] == $moduleType) {
$newdeps[$name] = true;
}
}
return $newdeps;
} else {
return $deps;
}
}
/**
* Use to get a list of modules superseded by the given module name
* @method getSuperceded
* @param {string} name Module name
* @return {array}
*/
function getSuperceded($name) {
$key = YUI_SUPERSEDES . $name;
if (isset($this->depCache[$key])) {
return $this->depCache[$key];
}
$sups = array();
if (isset($this->modules[$name])) {
$m = $this->modules[$name];
if (isset($m[YUI_SUPERSEDES])) {
foreach ($m[YUI_SUPERSEDES] as $supName) {
$sups[$supName] = true;
if (isset($this->modules[$supName])) {
$supsups = $this->getSuperceded($supName);
if (count($supsups) > 0) {
$sups = array_merge($sups, $supsups);
}
}
}
}
}
$this->depCache[$key] = $sups;
return $sups;
}
/**
* Identify dependencies for a give module name
* @method getAllDependencies
* @param {string} mname Module name
* @param {boolean} loadOptional Load optional dependencies
* @param {array} completed
* @return {array}
*/
function getAllDependencies($mname, $loadOptional=false, $completed=array()) {
$key = YUI_REQUIRES . $mname;
if ($loadOptional) {
$key .= YUI_OPTIONAL;
}
if (isset($this->depCache[$key])) {
return $this->depCache[$key];
}
$m = $this->modules[$mname];
$mProvides = $this->getProvides($mname);
$reqs = array();
//Some modules pretend to be others (override if this is the case)
if (isset($this->modules[$mname][YUI_EXPOUND])) {
if (!isset($completed[$mname])) {
$reqs = array_merge($completed, $this->getAllDependencies($this->modules[$mname][YUI_EXPOUND], $loadOptional, array($mname => true)));
}
}
//Add any requirements defined on the module itself
if (isset($m[YUI_REQUIRES])) {
$origreqs = $m[YUI_REQUIRES];
foreach($origreqs as $r) {
if (!isset($reqs[$r])) {
$reqs[$r] = true;
$reqs = array_merge($reqs, $this->getAllDependencies($r, $loadOptional, $reqs));
}
}
}
//Add any submodule requirements not provided by the rollups
if (isset($m[YUI_SUBMODULES])) {
foreach($m[YUI_SUBMODULES] as $submodule) {
$subreqs = $submodule[YUI_REQUIRES];
foreach($subreqs as $sr) {
if (!in_array($sr, $mProvides) && !in_array($sr, $this->accountedFor)) {
if (!isset($reqs[$sr])) {
$reqs[$sr] = true;
$reqs = array_merge($reqs, $this->getAllDependencies($sr, $loadOptional, $reqs));
}
}
}
}
}
//Add any superseded requirements not provided by the rollup and/or rollup submodules
if (isset($m[YUI_SUPERSEDES])) {
foreach($m[YUI_SUPERSEDES] as $supersededModule) {
if (isset($this->modules[$supersededModule][YUI_REQUIRES])) {
foreach($this->modules[$supersededModule][YUI_REQUIRES] as $supersededModuleReq) {
if (!in_array($supersededModuleReq, $mProvides)) {
if (!isset($reqs[$supersededModuleReq]))
{
$reqs[$supersededModuleReq] = true;
$reqs = array_merge($reqs, $this->getAllDependencies($supersededModuleReq, $loadOptional, $reqs));
}
}
}
}
//Add any submodule requirements not provided by the rollup or originally requested module
if (isset($this->modules[$supersededModule][YUI_SUBMODULES])) {
foreach($this->modules[$supersededModule][YUI_SUBMODULES] as $supersededSubmodule) {
$ssmProvides = $this->getProvides($supersededModule);
$supersededSubreqs = $supersededSubmodule[YUI_REQUIRES];
foreach($supersededSubreqs as $ssr) {
if (!in_array($ssr, $ssmProvides)) {
if (!isset($reqs[$ssr]))
{
$reqs[$ssr] = true;
$reqs = array_merge($reqs, $this->getAllDependencies($ssr, $loadOptional, $reqs));
}
}
}
}
}
}
}
if ($loadOptional && isset($m[YUI_OPTIONAL])) {
$o = $m[YUI_OPTIONAL];
foreach($o as $opt) {
$reqs[$opt] = true;
}
}
$this->depCache[$key] = $reqs;
return $reqs;
}
// @todo restore global dependency support
function getGlobalDependencies() {
return $this->globalModules;
}
/**
* Returns true if the supplied $satisfied module is satisfied by the
* supplied $satisfier module
*/
function moduleSatisfies($satisfied, $satisfier) {
if($satisfied == $satisfier) {
return true;
}
if (isset($this->satisfactionMap[$satisfied])) {
$satisfiers = $this->satisfactionMap[$satisfied];
return isset($satisfiers[$satisfier]);
}
return false;
}
/**
* Used to override the base dir for specific set of modules (Note: not supported when using the combo service)
* @method overrideBase
* @param {string} base Base path (e.g.) 2.6.0/build
* @param {array} modules Module names of which to override base
*/
function overrideBase($base, $modules) {
foreach ($modules as $name) {
$this->baseOverrides[$name] = $base;
}
}
/**
* Used to determine if one module is satisfied by provided array of modules
* @method listSatisfies
* @param {string} satisfied Module name
* @param {array} moduleList List of modules names
* @return {boolean}
*/
function listSatisfies($satisfied, $moduleList) {
if (isset($moduleList[$satisfied])) {
return true;
} else {
if (isset($this->satisfactionMap[$satisfied])) {
$satisfiers = $this->satisfactionMap[$satisfied];
foreach ($satisfiers as $name=>$val) {
if (isset($moduleList[$name])) {
return true;
}
}
}
}
return false;
}
/**
* Determine if rollup replacement threshold has been met
* @method checkThreshold
* @param {string} Module name
* @param {array} moduleList List of modules names
* @return {boolean}
*/
function checkThreshold($module, $moduleList) {
if (count($moduleList) > 0 && isset($module[YUI_ROLLUP])) {
$matched = 0;
$thresh = $module[YUI_ROLLUP];
foreach ($moduleList as $moduleName=>$moddef) {
if (in_array($moduleName, $module[YUI_SUPERSEDES])) {
$matched++;
}
}
return ($matched >= $thresh);
}
return false;
}
/**
* Used to sort dependencies in the proper order (Note: only call this if the loader is dirty)
* @method sortDependencies
* @param {string} Module name
* @param {array} moduleList List of modules names
* @return {boolean}
*/
function sortDependencies($moduleType, $skipSort=false) {
$reqs = array();
$top = array();
$bot = array();
$notdone = array();
$sorted = array();
$found = array();
// add global dependenices so they are included when calculating rollups
$globals = $this->getGlobalDependencies($moduleType);
foreach ($globals as $name=>$dep) {
$reqs[$name] = true;
}
// get and store the full list of dependencies.
foreach ($this->requests as $name=>$val) {
$reqs[$name] = true;
$dep = $this->modules[$name];
$newreqs = $this->getAllDependencies($name, $this->loadOptional);
foreach ($newreqs as $newname=>$newval) {
if (!isset($reqs[$newname])) {
$reqs[$newname] = true;
}
}
}
// if we skip the sort, we just return the list that includes everything that
// was requested, all of their requirements, and global modules. This is
// filtered by module type if supplied
if ($skipSort) {
return $this->prune($reqs, $moduleType);
}
// if we are sorting again after new modules have been requested, we
// do not rollup, and we can remove the accounted for modules
if (count($this->accountedFor) > 0 || count($this->loaded) > 0) {
foreach ($this->accountedFor as $name=>$val) {
if (isset($reqs[$name])) {
unset($reqs[$name]);
}
}
// removing satisfied req (loaded)
foreach ($this->loaded as $name=>$val) {
if (isset($reqs[$name])) {
unset($reqs[$name]);
}
}
} else if ($this->allowRollups) {
// First we go through the meta-modules we know about to
// see if the replacement threshold has been met.
$rollups = $this->rollupModules;
if (count($rollups > 0)) {
foreach ($rollups as $name => $rollup) {
if (!isset($reqs[$name]) && $this->checkThreshold($rollup, $reqs) ) {
$reqs[$name] = true;
$dep = $this->modules[$name];
$newreqs = $this->getAllDependencies($name, $this->loadOptional, $reqs);
foreach ($newreqs as $newname=>$newval) {
if (!isset($reqs[$newname])) {
$reqs[$newname] = true;
}
}
}
}
}
}
// clear out superceded packages
foreach ($reqs as $name => $val) {
$dep = $this->modules[$name];
if (isset($dep[YUI_SUPERSEDES])) {
$override = $dep[YUI_SUPERSEDES];
foreach ($override as $i=>$val) {
if (isset($reqs[$val])) {
unset($reqs[$val]);
}
if (isset($reqs[$i])) {
unset($reqs[$i]);
}
}
}
}
// move globals to the top
foreach ($reqs as $name => $val) {
$dep = $this->modules[$name];
if (isset($dep[YUI_GLOBAL]) && $dep[YUI_GLOBAL]) {
$top[$name] = $name;
} else {
$notdone[$name] = $name;
}
}
// merge new order if we have globals
if (count($top > 0)) {
$notdone = array_merge($top, $notdone);
}
// keep track of what is accounted for
foreach ($this->loaded as $name=>$module) {
$this->accountFor($name);
}
// keep going until everything is sorted
$count = 0;
while (count($notdone) > 0) {
if ($count++ > 200) {
$msg = "YUI_LOADER ERROR: sorting could not be completed, there may be a circular dependency";
error_log($msg, 0);
return array_merge($sorted, $notdone);
}
// each pass only processed what has not been completed
foreach ($notdone as $name => $val) {
$dep = $this->modules[$name];
$newreqs = $this->getAllDependencies($name, $this->loadOptional);
$this->accountFor($name);
//Detect if this module needs to be included after another one of the upcoming dependencies
if (isset($dep[YUI_AFTER])) {
$after = $dep[YUI_AFTER];
foreach($after as $a) {
if (in_array($a, $notdone)) {
$newreqs[$a] = true;
}
}
}
if (!empty($newreqs)) {
foreach ($newreqs as $depname=>$depval) {
// check if the item is accounted for in the $done list
if (isset($this->accountedFor[$depname]) || $this->listSatisfies($depname, $sorted)) {
//unset($notdone[$depname]);
} else {
$tmp = array();
$found = false;
foreach ($notdone as $newname => $newval) {
if ($this->moduleSatisfies($depname, $newname)) {
$tmp[$newname] = $newname;
unset($notdone[$newname]);
$found = true;
break; // found something that takes care of the dependency, so jump out
}
}
if ($found) {
// this should put the module that handles the dependency on top, immediately
// over the the item with the missing dependency
$notdone = array_merge($tmp, $notdone);
} else {
//Requirement was missing and not found within the current notdone list. Add and try again.
$notdone[$depname] = $depname;
}
break(2); // break out of this iteration so we can get the missed dependency
}
}
}
$sorted[$name] = $name;
unset($notdone[$name]);
}
}
//Deal with module skins
foreach ($sorted as $name => $val) {
$skinName = $this->skinSetup($name);
}
if ( count($this->skins) > 0 ) {
foreach ($this->skins as $name => $val) {
$sorted[$val] = true;
}
}
$this->dirty = false;
$this->sorted = $sorted;
// store the results, set clear the diry flag
return $this->prune($sorted, $moduleType);
}
function mapSatisfyingModule($satisfied, $satisfier) {
if (!isset($this->satisfactionMap[$satisfied])) {
$this->satisfactionMap[$satisfied] = array();
}
$this->satisfactionMap[$satisfied][$satisfier] = true;
}
/**
* Used to process the dependency list and retrieve the actual CSS and/or JavaScript resources
* in requested output format (e.g.) json, link/script nodes, embeddable code, php array, etc.
* @method processDependencies
* @param {string} outputType the format you like the response to be in
* @param {string} moduleType Type of module to return (i.e.) js or css
* @param {boolean} skipSort
* @param {boolean} showLoaded
* @return {varies} output format based on requested outputType
*/
function processDependencies($outputType, $moduleType, $skipSort=false, $showLoaded=false) {
$html = '';
// sort the output with css on top unless the output type is json
if ((!$moduleType) && (strpos($outputType, YUI_JSON) === false) && $outputType != YUI_DATA) {
$this->delayCache = true;
$css = $this->processDependencies($outputType, YUI_CSS, $skipSort, $showLoaded);
$js = $this->processDependencies($outputType, YUI_JS, $skipSort, $showLoaded);
// If the data has not been cached, cache what we have
if (!$this->cacheFound) {
$this->updateCache();
}
return $css . $js;
}
$json = array();
if ($showLoaded || (!$this->dirty && count($this->sorted) > 0)) {
$sorted = $this->prune($this->sorted, $moduleType);
} else {
$sorted = $this->sortDependencies($moduleType, $skipSort);
}
foreach ($sorted as $name => $val) {
if ($showLoaded || !isset($this->loaded[$name])) {
$dep = $this->modules[$name];
// only generate the tag once
switch ($outputType) {
case YUI_EMBED:
$html .= $this->getContent($name, $dep[YUI_TYPE])."\n";
break;
case YUI_RAW:
$html .= $this->getRaw($name)."\n";
break;
case YUI_JSON:
case YUI_DATA:
//$json[$dep[YUI_TYPE]][$this->getUrl($name)] = $this->getProvides($name);
$json[$dep[YUI_TYPE]][] = array(
$this->getUrl($name) => $this->getProvides($name)
);
break;
case YUI_FULLJSON:
$json[$dep[YUI_NAME]] = array();
$item = $json[$dep[YUI_NAME]];
$item[YUI_TYPE] = $dep[YUI_TYPE];
$item[YUI_URL] = $this->getUrl($name);
$item[YUI_PROVIDES] = $this->getProvides($name);
$item[YUI_REQUIRES] = $dep[YUI_REQUIRES];
$item[YUI_OPTIONAL] = $dep[YUI_OPTIONAL];
break;
case YUI_TAGS:
default:
if ($this->combine === true && $this->customModulesInUse === false) {
$this->addToCombo($name, $dep[YUI_TYPE]);
$html = $this->getComboLink($dep[YUI_TYPE]);
} else {
$html .= $this->getLink($name, $dep[YUI_TYPE])."\n";
}
}
}
}
// If the data has not been cached, and we are not running two
// rotations for separating css and js, cache what we have
if (!$this->cacheFound && !$this->delayCache) {
$this->updateCache();
}
if (!empty($json)) {
if ($this->canJSON()) {
$html .= json_encode($json);
} else {
$html .= "<!-- JSON not available, request failed -->";
}
}
// after the first pass we no longer try to use meta modules
$this->setProcessedModuleType($moduleType);
// keep track of all the stuff we loaded so that we don't reload
// scripts if the page makes multiple calls to tags
$this->loaded = array_merge($this->loaded, $sorted);
if ($this->combine === true) {
$this->clearComboLink($outputType);
}
// return the raw data structure
if ($outputType == YUI_DATA) {
return $json;
}
if ( count($this->undefined) > 0 ) {
$html .= "<!-- The following modules were requested but are not defined: " . join($this -> undefined, ",") . " -->\n";
}
return $html;
}
/**
* Retrieve the calculated url for the component in question
* @method getUrl
* @param {string} name YUI component name
*/
function getUrl($name) {
// figure out how to set targets and filters
$url = "";
$b = $this->base;
if (isset($this->baseOverrides[$name])) {
$b = $this->baseOverrides[$name];
}
if (isset($this->modules[$name])) {
$m = $this->modules[$name];
if (isset($m[YUI_FULLPATH])) {
$url = $m[YUI_FULLPATH];
} else {
$url = $b . $m[YUI_PATH];
}
} else {
$url = $b . $name;
}
if ($this->filter) {
if (count($this->filterList) > 0 && !isset($this->filterList[$name])) {
// skip the filter
} else if (isset($this->filters[$this->filter])) {
$filter = $this->filters[$this->filter];
$url = ereg_replace($filter[YUI_SEARCH], $filter[YUI_REPLACE], $url);
}
}
if ($this->version) {
$pre = (strstr($url, '?')) ? '&' : '?';
$url .= $pre . $this->versionKey . '=' . $this->version;
}
return $url;
}
/**
* Retrieve the contents of a remote resource
* @method getRemoteContent
* @param {string} url URL to fetch data from
* @return raw source
*/
function getRemoteContent($url) {
$remote_content = null;
if ($this->apcAvail === true) {
$remote_content = apc_fetch($url);
}
if (!$remote_content) {
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_FAILONERROR, 1);
//Doesn't work in safe mode or with openbase_dir enabled, see http://au.php.net/manual/ro/function.curl-setopt.php#71313.
$open_basedir = ini_get("open_basedir");
if (empty($open_basedir) && !ini_get('safe_mode')) {
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);// allow redirects
}
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1); // return into a variable
// curl_setopt($ch, CURLOPT_TIMEOUT, 3); // times out after 4s
$remote_content = curl_exec($ch);
// save the contents of the remote url for 30 minutes
if ($this->apcAvail === true) {
apc_store($url, $remote_content, $this->apcttl);
}
curl_close ($ch);
}
return $remote_content;
}
/**
* Retrieve the raw source contents for a given module name
* @method getRaw
* @param {string} name The module name you wish to fetch the source from
* @return {string} raw source
*/
function getRaw($name) {
if(!$this->curlAvail) {
return "<!--// cURL was not detected, so the content cannot be fetched -->";
}
$url = $this->getUrl($name);
return $this->getRemoteContent($url);
}
/**
* Retrieve the style or script node with embedded source for a given module name and resource type
* @method getContent
* @param {string} name The module name to fetch the source from
* @param {string} type Resource type (i.e.) YUI_JS or YUI_CSS
* @return {string} style or script node with embedded source
*/
function getContent($name, $type) {
if(!$this->curlAvail) {
return "<!--// cURL was not detected, so the content cannot be fetched/embedded -->" . $this->getLink($name, $type);
}
$url = $this->getUrl($name);
if (!$url) {
return '<!-- PATH FOR "'. $name . '" NOT SPECIFIED -->';
} else if ($type == YUI_CSS) {
return '<style type="text/css">' . $this->getRemoteContent($url) . '</style>';
} else {
return '<script type="text/javascript">' . $this->getRemoteContent($url) . '</script>';
}
}
/**
* Retrieve the link or script include for a given module name and resource type
* @method getLink
* @param {string} name The module name to fetch the include for
* @param {string} type Resource type (i.e.) YUI_JS or YUI_CSS
* @return {string} link or script include
*/
function getLink($name, $type) {
$url = $this->getUrl($name);
if (!$url) {
return '<!-- PATH FOR "'. $name . '" NOT SPECIFIED -->';
} else if ($type == YUI_CSS) {
return '<link rel="stylesheet" type="text/css" href="' . $url . '" />';
} else {
return '<script type="text/javascript" src="' . $url . '"></script>';
}
}
/**
* Retrieves the combo link or script include for the currently loaded modules of a specific resource type
* @method getComboLink
* @param {string} type Resource type (i.e.) YUI_JS or YUI_CSS
* @return {string} link or script include
*/
function getComboLink($type) {
$url = '';
if ($type == YUI_CSS) {
if ($this->cssComboLocation !== null) {
$url = "<link rel=\"stylesheet\" type=\"text/css\" href=\"{$this->cssComboLocation}\" />";
} else {
$url = "<!-- NO YUI CSS COMPONENTS IDENTIFIED -->";
}
} else if ($type == YUI_JS) {
if ($this->jsComboLocation !== null) {
if ($this->cssComboLocation !== null) {
$url = "\n";
}
$url .= "<script type=\"text/javascript\" src=\"{$this->jsComboLocation}\"></script>";
} else {
$url = "<!-- NO YUI JAVASCRIPT COMPONENTS IDENTIFIED -->";
}
}
//Allow for RAW & DEBUG over minified default
if ($this->filter) {
if (count($this->filterList) > 0 && !isset($this->filterList[$name])) {
// skip the filter
} else if (isset($this->filters[$this->filter])) {
$filter = $this->filters[$this->filter];
$url = ereg_replace($filter[YUI_SEARCH], $filter[YUI_REPLACE], $url);
}
}
return $url;
}
/**
* Clears the combo url of already loaded modules for a specific resource type. Prevents
* duplicate loading of modules if the page makes multiple calls to tags, css, or script.
* @method clearComboLink
* @param {string} type Resource type (i.e.) YUI_JS or YUI_CSS
*/
function clearComboLink($type) {
if ($type == YUI_CSS) {
$this->cssComboLocation = null;
} else if ($type == YUI_JS) {
$this->jsComboLocation = null;
} else {
$this->cssComboLocation = null;
$this->jsComboLocation = null;
}
}
/**
* Adds a module the combo collection for a specified resource type
* @method addToCombo
* @param {string} name The module name to add
* @param {string} type Resource type (i.e.) YUI_JS or YUI_CSS
*/
function addToCombo($name, $type) {
$pathToModule = $this->comboDefaultVersion . '/build/' . $this->modules[$name][YUI_PATH];
if ($type == YUI_CSS) {
//If this is the first css component then add the combo base path
if ($this->cssComboLocation === null) {
$this->cssComboLocation = $this->comboBase . $pathToModule;
} else {
//Prep for next component
$this->cssComboLocation .= '&' . $pathToModule;
}
} else {
//If this is the first js component then add the combo base path
if ($this->jsComboLocation === null) {
$this->jsComboLocation = $this->comboBase . $pathToModule;
} else {
//Prep for next component
$this->jsComboLocation .= '&' . $pathToModule;
}
}
}
/**
* Detects if environment supports JSON encode/decode
* @method canJSON
* @return boolean
*/
function canJSON() {
return $this->jsonAvail;
}
/**
* Identifies what module(s) are provided by a given module name (e.g.) yaho-dom-event provides yahoo, dom, and event
* @method getProvides
* @param {string} name Module name
* @return {array}
*/
function getProvides($name) {
$p = array($name);
if (isset($this->modules[$name])) {
$m = $this->modules[$name];
if (isset($m[YUI_SUPERSEDES])) {
foreach ($m[YUI_SUPERSEDES] as $i) {
$p[] = $i;
}
}
}
return $p;
}
/**
* Identifies what module(s) have been loaded via the load method and/or marked as loaded via the setLoaded method
* @method getLoadedModules
* @return {array}
*/
function getLoadedModules() {
$loaded = array();
foreach ($this->loaded as $i=>$value) {
if (isset($this->modules[$i])) {
$dep = $this->modules[$i];
$loaded[$dep[YUI_TYPE]][] = array(
$this->getUrl($i) => $this->getProvides($i)
);
} else {
$msg = "YUI_LOADER ERROR: encountered undefined module: " . $i;
error_log($msg, 0);
}
}
return $loaded;
}
/**
* Identifies what module(s) have been loaded via the load method and/or marked as loaded via the setLoaded method
* @method getLoadedModulesAsJSON
* @return {json}
*/
function getLoadedModulesAsJSON() {
if (!$this->canJSON()) {
return "{\"Error\", \"json library not available\"}";
}
return json_encode($this->getLoadedModules());
}
}
?>