dojo.provide("dijit.form.Form");

dojo.require("dijit._Widget");
dojo.require("dijit._Templated");
dojo.require("dijit.form._FormMixin");

dojo.declare(
	"dijit.form.Form",
	[dijit._Widget, dijit._Templated, dijit.form._FormMixin],
	{
		// summary:
		//		Widget corresponding to HTML form tag, for validation and serialization
		//
		// example:
		//	|	<form dojoType="dijit.form.Form" id="myForm">
		//	|		Name: <input type="text" name="name" />
		//	|	</form>
		//	|	myObj = {name: "John Doe"};
		//	|	dijit.byId('myForm').set('value', myObj);
		//	|
		//	|	myObj=dijit.byId('myForm').get('value');

		// HTML <FORM> attributes

		// name: String?
		//		Name of form for scripting.
		name: "",

		// action: String?
		//		Server-side form handler.
		action: "",

		// method: String?
		//		HTTP method used to submit the form, either "GET" or "POST".
		method: "",

		// encType: String?
		//		Encoding type for the form, ex: application/x-www-form-urlencoded.
		encType: "",

		// accept-charset: String?
		//		List of supported charsets.
		"accept-charset": "",

		// accept: String?
		//		List of MIME types for file upload.
		accept: "",

		// target: String?
		//		Target frame for the document to be opened in.
		target: "",

		templateString: "<form dojoAttachPoint='containerNode' dojoAttachEvent='onreset:_onReset,onsubmit:_onSubmit' ${!nameAttrSetting}></form>",

		attributeMap: dojo.delegate(dijit._Widget.prototype.attributeMap, {
			action: "",
			method: "",
			encType: "",
			"accept-charset": "",
			accept: "",
			target: ""
		}),

		postMixInProperties: function(){
			// Setup name=foo string to be referenced from the template (but only if a name has been specified)
			// Unfortunately we can't use attributeMap to set the name due to IE limitations, see #8660
			this.nameAttrSetting = this.name ? ("name='" + this.name + "'") : "";
			this.inherited(arguments);
		},

		execute: function(/*Object*/ formContents){
			// summary:
			//		Deprecated: use submit()
			// tags:
			//		deprecated
		},

		onExecute: function(){
			// summary:
			//		Deprecated: use onSubmit()
			// tags:
			//		deprecated
		},

		_setEncTypeAttr: function(/*String*/ value){
			this.encType = value;
			dojo.attr(this.domNode, "encType", value);
			if(dojo.isIE){ this.domNode.encoding = value; }
		},

		postCreate: function(){
			// IE tries to hide encType
			// TODO: this code should be in parser, not here.
			if(dojo.isIE && this.srcNodeRef && this.srcNodeRef.attributes){
				var item = this.srcNodeRef.attributes.getNamedItem('encType');
				if(item && !item.specified && (typeof item.value == "string")){
					this.set('encType', item.value);
				}
			}
			this.inherited(arguments);
		},

		reset: function(/*Event?*/ e){
			// summary:
			//		restores all widget values back to their init values,
			//		calls onReset() which can cancel the reset by returning false

			// create fake event so we can know if preventDefault() is called
			var faux = {
				returnValue: true, // the IE way
				preventDefault: function(){ // not IE
							this.returnValue = false;
						},
				stopPropagation: function(){}, 
				currentTarget: e ? e.target : this.domNode, 
				target: e ? e.target : this.domNode
			};
			// if return value is not exactly false, and haven't called preventDefault(), then reset
			if(!(this.onReset(faux) === false) && faux.returnValue){
				this.inherited(arguments, []);
			}
		},

		onReset: function(/*Event?*/ e){
			// summary:
			//		Callback when user resets the form. This method is intended
			//		to be over-ridden. When the `reset` method is called
			//		programmatically, the return value from `onReset` is used
			//		to compute whether or not resetting should proceed
			// tags:
			//		callback
			return true; // Boolean
		},

		_onReset: function(e){
			this.reset(e);
			dojo.stopEvent(e);
			return false;
		},

		_onSubmit: function(e){
			var fp = dijit.form.Form.prototype;
			// TODO: remove this if statement beginning with 2.0
			if(this.execute != fp.execute || this.onExecute != fp.onExecute){
				dojo.deprecated("dijit.form.Form:execute()/onExecute() are deprecated. Use onSubmit() instead.", "", "2.0");
				this.onExecute();
				this.execute(this.getValues());
			}
			if(this.onSubmit(e) === false){ // only exactly false stops submit
				dojo.stopEvent(e);
			}
		},

		onSubmit: function(/*Event?*/e){
			// summary:
			//		Callback when user submits the form.
			// description:
			//		This method is intended to be over-ridden, but by default it checks and
			//		returns the validity of form elements. When the `submit`
			//		method is called programmatically, the return value from
			//		`onSubmit` is used to compute whether or not submission
			//		should proceed
			// tags:
			//		extension

			return this.isValid(); // Boolean
		},

		submit: function(){
			// summary:
			//		programmatically submit form if and only if the `onSubmit` returns true
			if(!(this.onSubmit() === false)){
				this.containerNode.submit();
			}
		}
	}
);
