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define("dojo/has", ["require", "module"], function(require, module){
// module:
// dojo/has
// summary:
// Defines the has.js API and several feature tests used by dojo.
// description:
// This module defines the has API as described by the project has.js with the following additional features:
//
// - the has test cache is exposed at has.cache.
// - the method has.add includes a forth parameter that controls whether or not existing tests are replaced
// - the loader's has cache may be optionally copied into this module's has cahce.
//
// This module adopted from https://github.com/phiggins42/has.js; thanks has.js team!
// try to pull the has implementation from the loader; both the dojo loader and bdLoad provide one
// if using a foreign loader, then the has cache may be initialized via the config object for this module
// WARNING: if a foreign loader defines require.has to be something other than the has.js API, then this implementation fail
var has = require.has || function(){};
if(! 1 ){
var
isBrowser =
// the most fundamental decision: are we in the browser?
typeof window != "undefined" &&
typeof location != "undefined" &&
typeof document != "undefined" &&
window.location == location && window.document == document,
// has API variables
global = this,
doc = isBrowser && document,
element = doc && doc.createElement("DiV"),
cache = (module.config && module.config()) || {};
has = function(name){
// summary:
// Return the current value of the named feature.
//
// name: String|Integer
// The name (if a string) or identifier (if an integer) of the feature to test.
//
// description:
// Returns the value of the feature named by name. The feature must have been
// previously added to the cache by has.add.
return typeof cache[name] == "function" ? (cache[name] = cache[name](global, doc, element)) : cache[name]; // Boolean
};
has.cache = cache;
has.add = function(name, test, now, force){
// summary:
// Register a new feature test for some named feature.
// name: String|Integer
// The name (if a string) or identifier (if an integer) of the feature to test.
// test: Function
// A test function to register. If a function, queued for testing until actually
// needed. The test function should return a boolean indicating
// the presence of a feature or bug.
// now: Boolean?
// Optional. Omit if `test` is not a function. Provides a way to immediately
// run the test and cache the result.
// force: Boolean?
// Optional. If the test already exists and force is truthy, then the existing
// test will be replaced; otherwise, add does not replace an existing test (that
// is, by default, the first test advice wins).
// example:
// A redundant test, testFn with immediate execution:
// | has.add("javascript", function(){ return true; }, true);
//
// example:
// Again with the redundantness. You can do this in your tests, but we should
// not be doing this in any internal has.js tests
// | has.add("javascript", true);
//
// example:
// Three things are passed to the testFunction. `global`, `document`, and a generic element
// from which to work your test should the need arise.
// | has.add("bug-byid", function(g, d, el){
// | // g == global, typically window, yadda yadda
// | // d == document object
// | // el == the generic element. a `has` element.
// | return false; // fake test, byid-when-form-has-name-matching-an-id is slightly longer
// | });
(typeof cache[name]=="undefined" || force) && (cache[name]= test);
return now && has(name);
};
// since we're operating under a loader that doesn't provide a has API, we must explicitly initialize
// has as it would have otherwise been initialized by the dojo loader; use has.add to the builder
// can optimize these away iff desired
1 || has.add("host-browser", isBrowser);
1 || has.add("dom", isBrowser);
1 || has.add("dojo-dom-ready-api", 1);
1 || has.add("dojo-sniff", 1);
}
if( 1 ){
// Common application level tests
has.add("dom-addeventlistener", !!document.addEventListener);
has.add("touch", "ontouchstart" in document);
// I don't know if any of these tests are really correct, just a rough guess
has.add("device-width", screen.availWidth || innerWidth);
// Tests for DOMNode.attributes[] behavior:
// - dom-attributes-explicit - attributes[] only lists explicitly user specified attributes
// - dom-attributes-specified-flag (IE8) - need to check attr.specified flag to skip attributes user didn't specify
// - Otherwise, in IE6-7. attributes[] will list hundreds of values, so need to do outerHTML to get attrs instead.
var form = document.createElement("form");
has.add("dom-attributes-explicit", form.attributes.length == 0); // W3C
has.add("dom-attributes-specified-flag", form.attributes.length > 0 && form.attributes.length < 40); // IE8
}
has.clearElement = function(element){
// summary:
// Deletes the contents of the element passed to test functions.
element.innerHTML= "";
return element;
};
has.normalize = function(id, toAbsMid){
// summary:
// Resolves id into a module id based on possibly-nested tenary expression that branches on has feature test value(s).
//
// toAbsMid: Function
// Resolves a relative module id into an absolute module id
var
tokens = id.match(/[\?:]|[^:\?]*/g), i = 0,
get = function(skip){
var term = tokens[i++];
if(term == ":"){
// empty string module name, resolves to 0
return 0;
}else{
// postfixed with a ? means it is a feature to branch on, the term is the name of the feature
if(tokens[i++] == "?"){
if(!skip && has(term)){
// matched the feature, get the first value from the options
return get();
}else{
// did not match, get the second value, passing over the first
get(true);
return get(skip);
}
}
// a module
return term || 0;
}
};
id = get();
return id && toAbsMid(id);
};
has.load = function(id, parentRequire, loaded){
// summary:
// Conditional loading of AMD modules based on a has feature test value.
// id: String
// Gives the resolved module id to load.
// parentRequire: Function
// The loader require function with respect to the module that contained the plugin resource in it's
// dependency list.
// loaded: Function
// Callback to loader that consumes result of plugin demand.
if(id){
parentRequire([id], loaded);
}else{
loaded();
}
};
return has;
});
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