/**
* Provides dynamic loading for the YUI library. It includes the dependency
* info for the library, and will automatically pull in dependencies for
* the modules requested. It supports rollup files (such as utilities.js
* and yahoo-dom-event.js), and will automatically use these when
* appropriate in order to minimize the number of http connections
* required to load all of the dependencies.
*
* @module yuiloader
* @namespace YAHOO.util
*/
/**
* YUILoader provides dynamic loading for YUI.
* @class YAHOO.util.YUILoader
* @todo
* version management, automatic sandboxing
*/
(function() {
var Y=YAHOO, util=Y.util, lang=Y.lang, env=Y.env,
PROV = "_provides", SUPER = "_supersedes",
REQ = "expanded", AFTER = "_after";
var YUI = {
dupsAllowed: {'yahoo': true, 'get': true},
/*
* The library metadata for the current release The is the default
* value for YAHOO.util.YUILoader.moduleInfo
* @property YUIInfo
* @static
*/
info: {
'base': 'http://yui.yahooapis.com/2.5.1/build/',
'skin': {
'defaultSkin': 'sam',
'base': 'assets/skins/',
'path': 'skin.css',
'after': ['reset', 'fonts', 'grids', 'base'],
'rollup': 3
},
dupsAllowed: ['yahoo', 'get'],
'moduleInfo': {
'animation': {
'type': 'js',
'path': 'animation/animation-min.js',
'requires': ['dom', 'event']
},
'autocomplete': {
'type': 'js',
'path': 'autocomplete/autocomplete-min.js',
'requires': ['dom', 'event'],
'optional': ['connection', 'animation'],
'skinnable': true
},
'base': {
'type': 'css',
'path': 'base/base-min.css',
'after': ['reset', 'fonts', 'grids']
},
'button': {
'type': 'js',
'path': 'button/button-min.js',
'requires': ['element'],
'optional': ['menu'],
'skinnable': true
},
'calendar': {
'type': 'js',
'path': 'calendar/calendar-min.js',
'requires': ['event', 'dom'],
'skinnable': true
},
'charts': {
'type': 'js',
'path': 'charts/charts-experimental-min.js',
'requires': ['element', 'json', 'datasource']
},
'colorpicker': {
'type': 'js',
'path': 'colorpicker/colorpicker-min.js',
'requires': ['slider', 'element'],
'optional': ['animation'],
'skinnable': true
},
'connection': {
'type': 'js',
'path': 'connection/connection-min.js',
'requires': ['event']
},
'container': {
'type': 'js',
'path': 'container/container-min.js',
'requires': ['dom', 'event'],
// button is also optional, but this creates a circular
// dependency when loadOptional is specified. button
// optionally includes menu, menu requires container.
'optional': ['dragdrop', 'animation', 'connection'],
'supersedes': ['containercore'],
'skinnable': true
},
'containercore': {
'type': 'js',
'path': 'container/container_core-min.js',
'requires': ['dom', 'event'],
'pkg': 'container'
},
'cookie': {
'type': 'js',
'path': 'cookie/cookie-beta-min.js',
'requires': ['yahoo']
},
'datasource': {
'type': 'js',
'path': 'datasource/datasource-beta-min.js',
'requires': ['event'],
'optional': ['connection']
},
'datatable': {
'type': 'js',
'path': 'datatable/datatable-beta-min.js',
'requires': ['element', 'datasource'],
'optional': ['calendar', 'dragdrop'],
'skinnable': true
},
'dom': {
'type': 'js',
'path': 'dom/dom-min.js',
'requires': ['yahoo']
},
'dragdrop': {
'type': 'js',
'path': 'dragdrop/dragdrop-min.js',
'requires': ['dom', 'event']
},
'editor': {
'type': 'js',
'path': 'editor/editor-beta-min.js',
'requires': ['menu', 'element', 'button'],
'optional': ['animation', 'dragdrop'],
'skinnable': true
},
'element': {
'type': 'js',
'path': 'element/element-beta-min.js',
'requires': ['dom', 'event']
},
'event': {
'type': 'js',
'path': 'event/event-min.js',
'requires': ['yahoo']
},
'fonts': {
'type': 'css',
'path': 'fonts/fonts-min.css'
},
'get': {
'type': 'js',
'path': 'get/get-min.js',
'requires': ['yahoo']
},
'grids': {
'type': 'css',
'path': 'grids/grids-min.css',
'requires': ['fonts'],
'optional': ['reset']
},
'history': {
'type': 'js',
'path': 'history/history-min.js',
'requires': ['event']
},
'imagecropper': {
'type': 'js',
'path': 'imagecropper/imagecropper-beta-min.js',
'requires': ['dom', 'event', 'dragdrop', 'element', 'resize'],
'skinnable': true
},
'imageloader': {
'type': 'js',
'path': 'imageloader/imageloader-min.js',
'requires': ['event', 'dom']
},
'json': {
'type': 'js',
'path': 'json/json-min.js',
'requires': ['yahoo']
},
'layout': {
'type': 'js',
'path': 'layout/layout-beta-min.js',
'requires': ['dom', 'event', 'element'],
'optional': ['animation', 'dragdrop', 'resize', 'selector'],
'skinnable': true
},
'logger': {
'type': 'js',
'path': 'logger/logger-min.js',
'requires': ['event', 'dom'],
'optional': ['dragdrop'],
'skinnable': true
},
'menu': {
'type': 'js',
'path': 'menu/menu-min.js',
'requires': ['containercore'],
'skinnable': true
},
'profiler': {
'type': 'js',
'path': 'profiler/profiler-beta-min.js',
'requires': ['yahoo']
},
'profilerviewer': {
'type': 'js',
'path': 'profilerviewer/profilerviewer-beta-min.js',
'requires': ['profiler', 'yuiloader', 'element'],
'skinnable': true
},
'reset': {
'type': 'css',
'path': 'reset/reset-min.css'
},
'reset-fonts-grids': {
'type': 'css',
'path': 'reset-fonts-grids/reset-fonts-grids.css',
'supersedes': ['reset', 'fonts', 'grids', 'reset-fonts'],
'rollup': 4
},
'reset-fonts': {
'type': 'css',
'path': 'reset-fonts/reset-fonts.css',
'supersedes': ['reset', 'fonts'],
'rollup': 2
},
'resize': {
'type': 'js',
'path': 'resize/resize-beta-min.js',
'requires': ['dom', 'event', 'dragdrop', 'element'],
'optional': ['animation'],
'skinnable': true
},
'selector': {
'type': 'js',
'path': 'selector/selector-beta-min.js',
'requires': ['yahoo', 'dom']
},
'simpleeditor': {
'type': 'js',
'path': 'editor/simpleeditor-beta-min.js',
'requires': ['element'],
'optional': ['containercore', 'menu', 'button', 'animation', 'dragdrop'],
'skinnable': true,
'pkg': 'editor'
},
'slider': {
'type': 'js',
'path': 'slider/slider-min.js',
'requires': ['dragdrop'],
'optional': ['animation']
},
'tabview': {
'type': 'js',
'path': 'tabview/tabview-min.js',
'requires': ['element'],
'optional': ['connection'],
'skinnable': true
},
'treeview': {
'type': 'js',
'path': 'treeview/treeview-min.js',
'requires': ['event'],
'skinnable': true
},
'uploader': {
'type': 'js',
'path': 'uploader/uploader-experimental.js',
'requires': ['yahoo']
},
'utilities': {
'type': 'js',
'path': 'utilities/utilities.js',
'supersedes': ['yahoo', 'event', 'dragdrop', 'animation', 'dom', 'connection', 'element', 'yahoo-dom-event', 'get', 'yuiloader', 'yuiloader-dom-event'],
'rollup': 8
},
'yahoo': {
'type': 'js',
'path': 'yahoo/yahoo-min.js'
},
'yahoo-dom-event': {
'type': 'js',
'path': 'yahoo-dom-event/yahoo-dom-event.js',
'supersedes': ['yahoo', 'event', 'dom'],
'rollup': 3
},
'yuiloader': {
'type': 'js',
'path': 'yuiloader/yuiloader-beta-min.js',
'supersedes': ['yahoo', 'get']
},
'yuiloader-dom-event': {
'type': 'js',
'path': 'yuiloader-dom-event/yuiloader-dom-event.js',
'supersedes': ['yahoo', 'dom', 'event', 'get', 'yuiloader', 'yahoo-dom-event'],
'rollup': 5
},
'yuitest': {
'type': 'js',
'path': 'yuitest/yuitest-min.js',
'requires': ['logger'],
'skinnable': true
}
}
}
,
ObjectUtil: {
appendArray: function(o, a) {
if (a) {
for (var i=0; i<a.length; i=i+1) {
o[a[i]] = true;
}
}
},
keys: function(o, ordered) {
var a=[], i;
for (i in o) {
if (lang.hasOwnProperty(o, i)) {
a.push(i);
}
}
return a;
}
},
ArrayUtil: {
appendArray: function(a1, a2) {
Array.prototype.push.apply(a1, a2);
/*
for (var i=0; i<a2.length; i=i+1) {
a1.push(a2[i]);
}
*/
},
indexOf: function(a, val) {
for (var i=0; i<a.length; i=i+1) {
if (a[i] === val) {
return i;
}
}
return -1;
},
toObject: function(a) {
var o = {};
for (var i=0; i<a.length; i=i+1) {
o[a[i]] = true;
}
return o;
},
/*
* Returns a unique array. Does not maintain order, which is fine
* for this application, and performs better than it would if it
* did.
*/
uniq: function(a) {
return YUI.ObjectUtil.keys(YUI.ArrayUtil.toObject(a));
}
}
};
YAHOO.util.YUILoader = function(o) {
/**
* Internal callback to handle multiple internal insert() calls
* so that css is inserted prior to js
* @property _internalCallback
* @private
*/
this._internalCallback = null;
/**
* Use the YAHOO environment listener to detect script load. This
* is only switched on for Safari 2.x and below.
* @property _useYahooListener
* @private
*/
this._useYahooListener = false;
/**
* Callback that will be executed when the loader is finished
* with an insert
* @method onSuccess
* @type function
*/
this.onSuccess = null;
/**
* Callback that will be executed if there is a failure
* @method onFailure
* @type function
*/
this.onFailure = Y.log;
/**
* Callback that will be executed each time a new module is loaded
* @method onProgress
* @type function
*/
this.onProgress = null;
/**
* The execution scope for all callbacks
* @property scope
* @default this
*/
this.scope = this;
/**
* Data that is passed to all callbacks
* @property data
*/
this.data = null;
/**
* Node reference or id where new nodes should be inserted before
* @property insertBefore
* @type string|HTMLElement
*/
this.insertBefore = null;
/**
* The charset attribute for inserted nodes
* @property charset
* @type string
* @default utf-8
*/
this.charset = null;
/**
* The name of the variable in a sandbox or script node
* (for external script support in Safari 2.x and earlier)
* to reference when the load is complete. If this variable
* is not available in the specified scripts, the operation will
* fail.
* @property varName
* @type string
*/
this.varName = null;
/**
* The base directory.
* @property base
* @type string
* @default http://yui.yahooapis.com/[YUI VERSION]/build/
*/
this.base = YUI.info.base;
/**
* A list of modules that should not be loaded, even if
* they turn up in the dependency tree
* @property ignore
* @type string[]
*/
this.ignore = null;
/**
* A list of modules that should always be loaded, even
* if they have already been inserted into the page.
* @property force
* @type string[]
*/
this.force = null;
/**
* Should we allow rollups
* @property allowRollup
* @type boolean
* @default true
*/
this.allowRollup = true;
/**
* A filter to apply to result urls. This filter will modify the default
* path for all modules. The default path for the YUI library is the
* minified version of the files (e.g., event-min.js). The filter property
* can be a predefined filter or a custom filter. The valid predefined
* filters are:
* <dl>
* <dt>DEBUG</dt>
* <dd>Selects the debug versions of the library (e.g., event-debug.js).
* This option will automatically include the logger widget</dd>
* <dt>RAW</dt>
* <dd>Selects the non-minified version of the library (e.g., event.js).
* </dl>
* You can also define a custom filter, which must be an object literal
* containing a search expression and a replace string:
* <pre>
* myFilter: {
* 'searchExp': "-min\\.js",
* 'replaceStr': "-debug.js"
* }
* </pre>
* @property filter
* @type string|{searchExp: string, replaceStr: string}
*/
this.filter = null;
/**
* The list of requested modules
* @property required
* @type {string: boolean}
*/
this.required = {};
/**
* The library metadata
* @property moduleInfo
*/
this.moduleInfo = lang.merge(YUI.info.moduleInfo);
/**
* List of rollup files found in the library metadata
* @property rollups
*/
this.rollups = null;
/**
* Whether or not to load optional dependencies for
* the requested modules
* @property loadOptional
* @type boolean
* @default false
*/
this.loadOptional = false;
/**
* All of the derived dependencies in sorted order, which
* will be populated when either calculate() or insert()
* is called
* @property sorted
* @type string[]
*/
this.sorted = [];
/**
* Set when beginning to compute the dependency tree.
* Composed of what YAHOO reports to be loaded combined
* with what has been loaded by the tool
* @propery loaded
* @type {string: boolean}
*/
this.loaded = {};
/**
* Flag to indicate the dependency tree needs to be recomputed
* if insert is called again.
* @property dirty
* @type boolean
* @default true
*/
this.dirty = true;
/**
* List of modules inserted by the utility
* @property inserted
* @type {string: boolean}
*/
this.inserted = {};
/**
* Provides the information used to skin the skinnable components.
* The following skin definition would result in 'skin1' and 'skin2'
* being loaded for calendar (if calendar was requested), and
* 'sam' for all other skinnable components:
*
* <code>
* skin: {
*
* // The default skin, which is automatically applied if not
* // overriden by a component-specific skin definition.
* // Change this in to apply a different skin globally
* defaultSkin: 'sam',
*
* // This is combined with the loader base property to get
* // the default root directory for a skin. ex:
* // http://yui.yahooapis.com/2.3.0/build/assets/skins/sam/
* base: 'assets/skins/',
*
* // The name of the rollup css file for the skin
* path: 'skin.css',
*
* // The number of skinnable components requested that are
* // required before using the rollup file rather than the
* // individual component css files
* rollup: 3,
*
* // Any component-specific overrides can be specified here,
* // making it possible to load different skins for different
* // components. It is possible to load more than one skin
* // for a given component as well.
* overrides: {
* calendar: ['skin1', 'skin2']
* }
* }
* </code>
* @property skin
*/
var self = this;
env.listeners.push(function(m) {
if (self._useYahooListener) {
//Y.log("YAHOO listener: " + m.name);
self.loadNext(m.name);
}
});
this.skin = lang.merge(YUI.info.skin);
this._config(o);
};
Y.util.YUILoader.prototype = {
FILTERS: {
RAW: {
'searchExp': "-min\\.js",
'replaceStr': ".js"
},
DEBUG: {
'searchExp': "-min\\.js",
'replaceStr': "-debug.js"
}
},
SKIN_PREFIX: "skin-",
_config: function(o) {
// apply config values
if (o) {
for (var i in o) {
if (lang.hasOwnProperty(o, i)) {
if (i == "require") {
this.require(o[i]);
} else {
this[i] = o[i];
}
}
}
}
// fix filter
var f = this.filter;
if (lang.isString(f)) {
f = f.toUpperCase();
// the logger must be available in order to use the debug
// versions of the library
if (f === "DEBUG") {
this.require("logger");
}
// hack to handle a a bug where LogWriter is being instantiated
// at load time, and the loader has no way to sort above it
// at the moment.
if (!Y.widget.LogWriter) {
Y.widget.LogWriter = function() {
return Y;
};
}
this.filter = this.FILTERS[f];
}
},
/** Add a new module to the component metadata.
* <dl>
* <dt>name:</dt> <dd>required, the component name</dd>
* <dt>type:</dt> <dd>required, the component type (js or css)</dd>
* <dt>path:</dt> <dd>required, the path to the script from "base"</dd>
* <dt>requires:</dt> <dd>array of modules required by this component</dd>
* <dt>optional:</dt> <dd>array of optional modules for this component</dd>
* <dt>supersedes:</dt> <dd>array of the modules this component replaces</dd>
* <dt>after:</dt> <dd>array of modules the components which, if present, should be sorted above this one</dd>
* <dt>rollup:</dt> <dd>the number of superseded modules required for automatic rollup</dd>
* <dt>fullpath:</dt> <dd>If fullpath is specified, this is used instead of the configured base + path</dd>
* <dt>skinnable:</dt> <dd>flag to determine if skin assets should automatically be pulled in</dd>
* </dl>
* @method addModule
* @param o An object containing the module data
* @return {boolean} true if the module was added, false if
* the object passed in did not provide all required attributes
*/
addModule: function(o) {
if (!o || !o.name || !o.type || (!o.path && !o.fullpath)) {
return false;
}
o.ext = ('ext' in o) ? o.ext : true;
o.requires = o.requires || [];
this.moduleInfo[o.name] = o;
this.dirty = true;
return true;
},
/**
* Add a requirement for one or more module
* @method require
* @param what {string[] | string*} the modules to load
*/
require: function(what) {
var a = (typeof what === "string") ? arguments : what;
this.dirty = true;
YUI.ObjectUtil.appendArray(this.required, a);
},
/**
* Adds the skin def to the module info
* @method _addSkin
* @param skin {string} the name of the skin
* @param mod {string} the name of the module
* @return {string} the module name for the skin
* @private
*/
_addSkin: function(skin, mod) {
// Add a module definition for the skin rollup css
var name = this.formatSkin(skin), info = this.moduleInfo,
sinf = this.skin, ext = info[mod] && info[mod].ext;
// Y.log('ext? ' + mod + ": " + ext);
if (!info[name]) {
// Y.log('adding skin ' + name);
this.addModule({
'name': name,
'type': 'css',
'path': sinf.base + skin + '/' + sinf.path,
//'supersedes': '*',
'after': sinf.after,
'rollup': sinf.rollup,
'ext': ext
});
}
// Add a module definition for the module-specific skin css
if (mod) {
name = this.formatSkin(skin, mod);
if (!info[name]) {
var mdef = info[mod], pkg = mdef.pkg || mod;
// Y.log('adding skin ' + name);
this.addModule({
'name': name,
'type': 'css',
'after': sinf.after,
'path': pkg + '/' + sinf.base + skin + '/' + mod + '.css',
'ext': ext
});
}
}
return name;
},
/**
* Returns an object containing properties for all modules required
* in order to load the requested module
* @method getRequires
* @param mod The module definition from moduleInfo
*/
getRequires: function(mod) {
if (!mod) {
return [];
}
if (!this.dirty && mod.expanded) {
return mod.expanded;
}
mod.requires=mod.requires || [];
var i, d=[], r=mod.requires, o=mod.optional, info=this.moduleInfo, m;
for (i=0; i<r.length; i=i+1) {
d.push(r[i]);
m = info[r[i]];
YUI.ArrayUtil.appendArray(d, this.getRequires(m));
// add existing skins for skinnable modules as well. The only
// way to do this is go through the list of required items (this
// assumes that _skin is called before getRequires is called on
// the module.
// if (m.skinnable) {
// var req=this.required, l=req.length;
// for (var j=0; j<l; j=j+1) {
// // YAHOO.log('checking ' + r[j]);
// if (req[j].indexOf(r[j]) > -1) {
// // YAHOO.log('adding ' + r[j]);
// d.push(req[j]);
// }
// }
// }
}
if (o && this.loadOptional) {
for (i=0; i<o.length; i=i+1) {
d.push(o[i]);
YUI.ArrayUtil.appendArray(d, this.getRequires(info[o[i]]));
}
}
mod.expanded = YUI.ArrayUtil.uniq(d);
return mod.expanded;
},
/**
* Returns an object literal of the modules the supplied module satisfies
* @method getProvides
* @param name{string} The name of the module
* @param notMe {string} don't add this module name, only include superseded modules
* @return what this module provides
*/
getProvides: function(name, notMe) {
var addMe = !(notMe), ckey = (addMe) ? PROV : SUPER,
m = this.moduleInfo[name], o = {};
if (!m) {
return o;
}
if (m[ckey]) {
// Y.log('cached: ' + name + ' ' + ckey + ' ' + lang.dump(this.moduleInfo[name][ckey], 0));
return m[ckey];
}
var s = m.supersedes, done={}, me = this;
// use worker to break cycles
var add = function(mm) {
if (!done[mm]) {
// Y.log(name + ' provides worker trying: ' + mm);
done[mm] = true;
// we always want the return value normal behavior
// (provides) for superseded modules.
lang.augmentObject(o, me.getProvides(mm));
}
// else {
// Y.log(name + ' provides worker skipping done: ' + mm);
// }
};
// calculate superseded modules
if (s) {
for (var i=0; i<s.length; i=i+1) {
add(s[i]);
}
}
// supersedes cache
m[SUPER] = o;
// provides cache
m[PROV] = lang.merge(o);
m[PROV][name] = true;
// Y.log(name + " supersedes " + lang.dump(m[SUPER], 0));
// Y.log(name + " provides " + lang.dump(m[PROV], 0));
return m[ckey];
},
/**
* Calculates the dependency tree, the result is stored in the sorted
* property
* @method calculate
* @param o optional options object
*/
calculate: function(o) {
if (this.dirty) {
this._config(o);
this._setup();
this._explode();
// this._skin(); // deprecated
if (this.allowRollup) {
this._rollup();
}
this._reduce();
this._sort();
// Y.log("after calculate: " + lang.dump(this.required));
this.dirty = false;
}
},
/**
* Investigates the current YUI configuration on the page. By default,
* modules already detected will not be loaded again unless a force
* option is encountered. Called by calculate()
* @method _setup
* @private
*/
_setup: function() {
var info = this.moduleInfo, name, i, j;
// Create skin modules
for (name in info) {
var m = info[name];
if (m && m.skinnable) {
// Y.log("skinning: " + name);
var o=this.skin.overrides, smod;
if (o && o[name]) {
for (i=0; i<o[name].length; i=i+1) {
smod = this._addSkin(o[name][i], name);
}
} else {
smod = this._addSkin(this.skin.defaultSkin, name);
}
m.requires.push(smod);
}
}
var l = lang.merge(this.inserted); // shallow clone
if (!this._sandbox) {
l = lang.merge(l, env.modules);
}
// Y.log("Already loaded stuff: " + lang.dump(l, 0));
// add the ignore list to the list of loaded packages
if (this.ignore) {
YUI.ObjectUtil.appendArray(l, this.ignore);
}
// remove modules on the force list from the loaded list
if (this.force) {
for (i=0; i<this.force.length; i=i+1) {
if (this.force[i] in l) {
delete l[this.force[i]];
}
}
}
// expand the list to include superseded modules
for (j in l) {
// Y.log("expanding: " + j);
if (lang.hasOwnProperty(l, j)) {
lang.augmentObject(l, this.getProvides(j));
}
}
// Y.log("loaded expanded: " + lang.dump(l, 0));
this.loaded = l;
},
/**
* Inspects the required modules list looking for additional
* dependencies. Expands the required list to include all
* required modules. Called by calculate()
* @method _explode
* @private
*/
_explode: function() {
var r=this.required, i, mod;
for (i in r) {
mod = this.moduleInfo[i];
if (mod) {
var req = this.getRequires(mod);
if (req) {
YUI.ObjectUtil.appendArray(r, req);
}
}
}
},
/**
* Sets up the requirements for the skin assets if any of the
* requested modules are skinnable
* @method _skin
* @private
* @deprecated skin modules are generated for all skinnable
* components during _setup(), and the components
* are configured to require the skin.
*/
_skin: function() {
},
/**
* Returns the skin module name for the specified skin name. If a
* module name is supplied, the returned skin module name is
* specific to the module passed in.
* @method formatSkin
* @param skin {string} the name of the skin
* @param mod {string} optional: the name of a module to skin
* @return {string} the full skin module name
*/
formatSkin: function(skin, mod) {
var s = this.SKIN_PREFIX + skin;
if (mod) {
s = s + "-" + mod;
}
return s;
},
/**
* Reverses <code>formatSkin</code>, providing the skin name and
* module name if the string matches the pattern for skins.
* @method parseSkin
* @param mod {string} the module name to parse
* @return {skin: string, module: string} the parsed skin name
* and module name, or null if the supplied string does not match
* the skin pattern
*/
parseSkin: function(mod) {
if (mod.indexOf(this.SKIN_PREFIX) === 0) {
var a = mod.split("-");
return {skin: a[1], module: a[2]};
}
return null;
},
/**
* Look for rollup packages to determine if all of the modules a
* rollup supersedes are required. If so, include the rollup to
* help reduce the total number of connections required. Called
* by calculate()
* @method _rollup
* @private
*/
_rollup: function() {
var i, j, m, s, rollups={}, r=this.required, roll;
// find and cache rollup modules
if (this.dirty || !this.rollups) {
for (i in this.moduleInfo) {
m = this.moduleInfo[i];
//if (m && m.rollup && m.supersedes) {
if (m && m.rollup) {
rollups[i] = m;
}
}
this.rollups = rollups;
}
// make as many passes as needed to pick up rollup rollups
for (;;) {
var rolled = false;
// go through the rollup candidates
for (i in rollups) {
// there can be only one
if (!r[i] && !this.loaded[i]) {
m =this.moduleInfo[i]; s = m.supersedes; roll=false;
if (!m.rollup) {
continue;
}
var skin = (m.ext) ? false : this.parseSkin(i), c = 0;
// Y.log('skin? ' + i + ": " + skin);
if (skin) {
for (j in r) {
if (i !== j && this.parseSkin(j)) {
c++;
roll = (c >= m.rollup);
if (roll) {
// Y.log("skin rollup " + lang.dump(r));
break;
}
}
}
} else {
// check the threshold
for (j=0;j<s.length;j=j+1) {
// if the superseded module is loaded, we can't load the rollup
if (this.loaded[s[j]] && (!YUI.dupsAllowed[s[j]])) {
roll = false;
break;
// increment the counter if this module is required. if we are
// beyond the rollup threshold, we will use the rollup module
} else if (r[s[j]]) {
c++;
roll = (c >= m.rollup);
if (roll) {
// Y.log("over thresh " + c + ", " + lang.dump(r));
break;
}
}
}
}
if (roll) {
// Y.log("rollup: " + i + ", " + lang.dump(this, 1));
// add the rollup
r[i] = true;
rolled = true;
// expand the rollup's dependencies
this.getRequires(m);
}
}
}
// if we made it here w/o rolling up something, we are done
if (!rolled) {
break;
}
}
},
/**
* Remove superceded modules and loaded modules. Called by
* calculate() after we have the mega list of all dependencies
* @method _reduce
* @private
*/
_reduce: function() {
var i, j, s, m, r=this.required;
for (i in r) {
// remove if already loaded
if (i in this.loaded) {
delete r[i];
// remove anything this module supersedes
} else {
var skinDef = this.parseSkin(i);
if (skinDef) {
//YAHOO.log("skin found in reduce: " + skinDef.skin + ", " + skinDef.module);
// the skin rollup will not have a module name
if (!skinDef.module) {
var skin_pre = this.SKIN_PREFIX + skinDef.skin;
//YAHOO.log("skin_pre: " + skin_pre);
for (j in r) {
m = this.moduleInfo[j];
var ext = m && m.ext;
if (!ext && j !== i && j.indexOf(skin_pre) > -1) {
// Y.log ("removing component skin: " + j);
delete r[j];
}
}
}
} else {
m = this.moduleInfo[i];
s = m && m.supersedes;
if (s) {
for (j=0; j<s.length; j=j+1) {
if (s[j] in r) {
delete r[s[j]];
}
}
}
}
}
}
},
/**
* Sorts the dependency tree. The last step of calculate()
* @method _sort
* @private
*/
_sort: function() {
// create an indexed list
var s=[], info=this.moduleInfo, loaded=this.loaded,
me = this;
// returns true if b is not loaded, and is required
// directly or by means of modules it supersedes.
var requires = function(aa, bb) {
if (loaded[bb]) {
return false;
}
var ii, mm=info[aa], rr=mm && mm.expanded,
after = mm && mm.after, other=info[bb];
// check if this module requires the other directly
if (rr && YUI.ArrayUtil.indexOf(rr, bb) > -1) {
return true;
}
// check if this module should be sorted after the other
if (after && YUI.ArrayUtil.indexOf(after, bb) > -1) {
return true;
}
// check if this module requires one the other supersedes
var ss=info[bb] && info[bb].supersedes;
if (ss) {
for (ii=0; ii<ss.length; ii=ii+1) {
if (requires(aa, ss[ii])) {
return true;
}
}
}
// var ss=me.getProvides(bb, true);
// if (ss) {
// for (ii in ss) {
// if (requires(aa, ii)) {
// return true;
// }
// }
// }
// external css files should be sorted below yui css
if (mm.ext && mm.type == 'css' && (!other.ext)) {
return true;
}
return false;
};
// get the required items out of the obj into an array so we
// can sort
for (var i in this.required) {
s.push(i);
}
// pointer to the first unsorted item
var p=0;
// keep going until we make a pass without moving anything
for (;;) {
var l=s.length, a, b, j, k, moved=false;
// start the loop after items that are already sorted
for (j=p; j<l; j=j+1) {
// check the next module on the list to see if its
// dependencies have been met
a = s[j];
// check everything below current item and move if we
// find a requirement for the current item
for (k=j+1; k<l; k=k+1) {
if (requires(a, s[k])) {
// extract the dependency so we can move it up
b = s.splice(k, 1);
// insert the dependency above the item that
// requires it
s.splice(j, 0, b[0]);
moved = true;
break;
}
}
// jump out of loop if we moved something
if (moved) {
break;
// this item is sorted, move our pointer and keep going
} else {
p = p + 1;
}
}
// when we make it here and moved is false, we are
// finished sorting
if (!moved) {
break;
}
}
this.sorted = s;
},
toString: function() {
var o = {
type: "YUILoader",
base: this.base,
filter: this.filter,
required: this.required,
loaded: this.loaded,
inserted: this.inserted
};
lang.dump(o, 1);
},
/**
* inserts the requested modules and their dependencies.
* <code>type</code> can be "js" or "css". Both script and
* css are inserted if type is not provided.
* @method insert
* @param o optional options object
* @param type {string} the type of dependency to insert
*/
insert: function(o, type) {
// if (o) {
// Y.log("insert: " + lang.dump(o, 1) + ", " + type);
// } else {
// Y.log("insert: " + this.toString() + ", " + type);
// }
// build the dependency list
this.calculate(o);
if (!type) {
// Y.log("trying to load css first");
var self = this;
this._internalCallback = function() {
self._internalCallback = null;
self.insert(null, "js");
};
this.insert(null, "css");
return;
}
// set a flag to indicate the load has started
this._loading = true;
// keep the loadType (js, css or undefined) cached
this.loadType = type;
// start the load
this.loadNext();
},
/*
* Interns the script for the requested modules. The callback is
* provided a reference to the sandboxed YAHOO object. This only
* applies to the script: css can not be sandboxed; css will be
* loaded into the page normally if specified.
* @method sandbox
* @param callback {Function} the callback to exectued when the load is
* complete.
*/
sandbox: function(o, type) {
if (o) {
// YAHOO.log("sandbox: " + lang.dump(o, 1) + ", " + type);
} else {
// YAHOO.log("sandbox: " + this.toString() + ", " + type);
}
this._config(o);
if (!this.onSuccess) {
throw new Error("You must supply an onSuccess handler for your sandbox");
}
this._sandbox = true;
var self = this;
// take care of any css first (this can't be sandboxed)
if (!type || type !== "js") {
this._internalCallback = function() {
self._internalCallback = null;
self.sandbox(null, "js");
};
this.insert(null, "css");
return;
}
// get the connection manager if not on the page
if (!util.Connect) {
// get a new loader instance to load connection.
var ld = new YAHOO.util.YUILoader();
ld.insert({
base: this.base,
filter: this.filter,
require: "connection",
insertBefore: this.insertBefore,
charset: this.charset,
onSuccess: function() {
this.sandbox(null, "js");
},
scope: this
}, "js");
return;
}
this._scriptText = [];
this._loadCount = 0;
this._stopCount = this.sorted.length;
this._xhr = [];
this.calculate();
var s=this.sorted, l=s.length, i, m, url;
for (i=0; i<l; i=i+1) {
m = this.moduleInfo[s[i]];
// undefined modules cause a failure
if (!m) {
this.onFailure.call(this.scope, {
msg: "undefined module " + m,
data: this.data
});
for (var j=0;j<this._xhr.length;j=j+1) {
this._xhr[j].abort();
}
return;
}
// css files should be done
if (m.type !== "js") {
this._loadCount++;
continue;
}
url = m.fullpath || this._url(m.path);
// YAHOO.log("xhr request: " + url + ", " + i);
var xhrData = {
success: function(o) {
var idx=o.argument[0], name=o.argument[2];
// store the response in the position it was requested
this._scriptText[idx] = o.responseText;
// YAHOO.log("received: " + o.responseText.substr(0, 100) + ", " + idx);
if (this.onProgress) {
this.onProgress.call(this.scope, {
name: name,
scriptText: o.responseText,
xhrResponse: o,
data: this.data
});
}
// only generate the sandbox once everything is loaded
this._loadCount++;
if (this._loadCount >= this._stopCount) {
// the variable to find
var v = this.varName || "YAHOO";
// wrap the contents of the requested modules in an anonymous function
var t = "(function() {\n";
// return the locally scoped reference.
var b = "\nreturn " + v + ";\n})();";
var ref = eval(t + this._scriptText.join("\n") + b);
this._pushEvents(ref);
if (ref) {
this.onSuccess.call(this.scope, {
reference: ref,
data: this.data
});
} else {
this.onFailure.call(this.scope, {
msg: this.varName + " reference failure",
data: this.data
});
}
}
},
failure: function(o) {
this.onFailure.call(this.scope, {
msg: "XHR failure",
xhrResponse: o,
data: this.data
});
},
scope: this,
// module index, module name, sandbox name
argument: [i, url, s[i]]
};
this._xhr.push(util.Connect.asyncRequest('GET', url, xhrData));
}
},
/**
* Executed every time a module is loaded, and if we are in a load
* cycle, we attempt to load the next script. Public so that it
* is possible to call this if using a method other than
* YAHOO.register to determine when scripts are fully loaded
* @method loadNext
* @param mname {string} optional the name of the module that has
* been loaded (which is usually why it is time to load the next
* one)
*/
loadNext: function(mname) {
// It is possible that this function is executed due to something
// else one the page loading a YUI module. Only react when we
// are actively loading something
if (!this._loading) {
return;
}
if (mname) {
// if the module that was just loaded isn't what we were expecting,
// continue to wait
if (mname !== this._loading) {
return;
}
// YAHOO.log("loadNext executing, just loaded " + mname);
// The global handler that is called when each module is loaded
// will pass that module name to this function. Storing this
// data to avoid loading the same module multiple times
this.inserted[mname] = true;
if (this.onProgress) {
this.onProgress.call(this.scope, {
name: mname,
data: this.data
});
}
//var o = this.getProvides(mname);
//this.inserted = lang.merge(this.inserted, o);
}
var s=this.sorted, len=s.length, i, m;
for (i=0; i<len; i=i+1) {
// This.inserted keeps track of what the loader has loaded
if (s[i] in this.inserted) {
// YAHOO.log(s[i] + " alread loaded ");
continue;
}
// Because rollups will cause multiple load notifications
// from YAHOO, loadNext may be called multiple times for
// the same module when loading a rollup. We can safely
// skip the subsequent requests
if (s[i] === this._loading) {
// YAHOO.log("still loading " + s[i] + ", waiting");
return;
}
// log("inserting " + s[i]);
m = this.moduleInfo[s[i]];
if (!m) {
this.onFailure.call(this.scope, {
msg: "undefined module " + m,
data: this.data
});
return;
}
// The load type is stored to offer the possibility to load
// the css separately from the script.
if (!this.loadType || this.loadType === m.type) {
this._loading = s[i];
//YAHOO.log("attempting to load " + s[i] + ", " + this.base);
var fn=(m.type === "css") ? util.Get.css : util.Get.script,
url=m.fullpath || this._url(m.path), self=this,
c=function(o) {
self.loadNext(o.data);
};
// safari 2.x or lower, script, and part of YUI
if (env.ua.webkit && env.ua.webkit < 420 && m.type === "js" &&
!m.varName) {
//YUI.info.moduleInfo[s[i]]) {
//YAHOO.log("using YAHOO env " + s[i] + ", " + m.varName);
c = null;
this._useYahooListener = true;
}
fn(url, {
data: s[i],
onSuccess: c,
insertBefore: this.insertBefore,
charset: this.charset,
varName: m.varName,
scope: self
});
return;
}
}
// we are finished
this._loading = null;
// internal callback for loading css first
if (this._internalCallback) {
var f = this._internalCallback;
this._internalCallback = null;
f.call(this);
} else if (this.onSuccess) {
this._pushEvents();
this.onSuccess.call(this.scope, {
data: this.data
});
}
},
/**
* In IE, the onAvailable/onDOMReady events need help when Event is
* loaded dynamically
* @method _pushEvents
* @param {Function} optional function reference
* @private
*/
_pushEvents: function(ref) {
var r = ref || YAHOO;
if (r.util && r.util.Event) {
r.util.Event._load();
}
},
/**
* Generates the full url for a module
* method _url
* @param path {string} the path fragment
* @return {string} the full url
* @private
*/
_url: function(path) {
var u = this.base || "", f=this.filter;
u = u + path;
if (f) {
// YAHOO.log("filter: " + f + ", " + f.searchExp +
// ", " + f.replaceStr);
u = u.replace(new RegExp(f.searchExp), f.replaceStr);
}
// YAHOO.log(u);
return u;
}
};
})();