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

dojo.require("dijit.form._FormWidget");
dojo.require("dijit._Container");
dojo.require("dijit._HasDropDown");

dojo.declare("dijit.form.Button",
	dijit.form._FormWidget,
	{
	// summary:
	//		Basically the same thing as a normal HTML button, but with special styling.
	// description:
	//		Buttons can display a label, an icon, or both.
	//		A label should always be specified (through innerHTML) or the label
	//		attribute.  It can be hidden via showLabel=false.
	// example:
	// |	<button dojoType="dijit.form.Button" onClick="...">Hello world</button>
	//
	// example:
	// |	var button1 = new dijit.form.Button({label: "hello world", onClick: foo});
	// |	dojo.body().appendChild(button1.domNode);

	// label: HTML String
	//		Text to display in button.
	//		If the label is hidden (showLabel=false) then and no title has
	//		been specified, then label is also set as title attribute of icon.
	label: "",

	// showLabel: Boolean
	//		Set this to true to hide the label text and display only the icon.
	//		(If showLabel=false then iconClass must be specified.)
	//		Especially useful for toolbars.
	//		If showLabel=true, the label will become the title (a.k.a. tooltip/hint) of the icon.
	//
	//		The exception case is for computers in high-contrast mode, where the label
	//		will still be displayed, since the icon doesn't appear.
	showLabel: true,

	// iconClass: String
	//		Class to apply to DOMNode in button to make it display an icon
	iconClass: "",

	// type: String
	//		Defines the type of button.  "button", "submit", or "reset".
	type: "button",

	baseClass: "dijitButton",

	templateString: dojo.cache("dijit.form", "templates/Button.html"),

	attributeMap: dojo.delegate(dijit.form._FormWidget.prototype.attributeMap, {
		label: { node: "containerNode", type: "innerHTML" },
		iconClass: { node: "iconNode", type: "class" }
	}),


	_onClick: function(/*Event*/ e){
		// summary:
		//		Internal function to handle click actions
		if(this.disabled){
			return false;
		}
		this._clicked(); // widget click actions
		return this.onClick(e); // user click actions
	},

	_onButtonClick: function(/*Event*/ e){
		// summary:
		//		Handler when the user activates the button portion.
		if(this._onClick(e) === false){ // returning nothing is same as true
			e.preventDefault(); // needed for checkbox
		}else if(this.type == "submit" && !this.focusNode.form){ // see if a nonform widget needs to be signalled
			for(var node=this.domNode; node.parentNode/*#5935*/; node=node.parentNode){
				var widget=dijit.byNode(node);
				if(widget && typeof widget._onSubmit == "function"){
					widget._onSubmit(e);
					break;
				}
			}
		}
	},

	_setValueAttr: function(/*String*/ value){
		// Verify that value cannot be set for BUTTON elements.
		var attr = this.attributeMap.value || '';
		if(this[attr.node || attr || 'domNode'].tagName == 'BUTTON'){
			// On IE, setting value actually overrides innerHTML, so disallow for everyone for consistency
			if(value != this.value){
				console.debug('Cannot change the value attribute on a Button widget.');
			}
		}
	},

	_fillContent: function(/*DomNode*/ source){
		// Overrides _Templated._fillContent().
		// If button label is specified as srcNodeRef.innerHTML rather than
		// this.params.label, handle it here.
		if(source && (!this.params || !("label" in this.params))){
			this.attr('label', source.innerHTML);
		}
	},

	postCreate: function(){
		dojo.setSelectable(this.focusNode, false);
		this.inherited(arguments);
	},

	_setShowLabelAttr: function(val){
		if(this.containerNode){
			dojo.toggleClass(this.containerNode, "dijitDisplayNone", !val);
		}
		this.showLabel = val;
	},

	onClick: function(/*Event*/ e){
		// summary:
		//		Callback for when button is clicked.
		//		If type="submit", return true to perform submit, or false to cancel it.
		// type:
		//		callback
		return true;		// Boolean
	},

	_clicked: function(/*Event*/ e){
		// summary:
		//		Internal overridable function for when the button is clicked
	},

	setLabel: function(/*String*/ content){
		// summary:
		//		Deprecated.  Use attr('label', ...) instead.
		dojo.deprecated("dijit.form.Button.setLabel() is deprecated.  Use attr('label', ...) instead.", "", "2.0");
		this.attr("label", content);
	},
	_setLabelAttr: function(/*String*/ content){
		// summary:
		//		Hook for attr('label', ...) to work.
		// description:
		//		Set the label (text) of the button; takes an HTML string.
		this.containerNode.innerHTML = this.label = content;
		if(this.showLabel == false && !this.params.title){
			this.titleNode.title = dojo.trim(this.containerNode.innerText || this.containerNode.textContent || '');
		}
	}
});


dojo.declare("dijit.form.DropDownButton", [dijit.form.Button, dijit._Container, dijit._HasDropDown], {
	// summary:
	//		A button with a drop down
	//
	// example:
	// |	<button dojoType="dijit.form.DropDownButton" label="Hello world">
	// |		<div dojotype="dijit.Menu">...</div>
	// |	</button>
	//
	// example:
	// |	var button1 = new dijit.form.DropDownButton({ label: "hi", dropDown: new dijit.Menu(...) });
	// |	dojo.body().appendChild(button1);
	//

	baseClass : "dijitDropDownButton",

	templateString: dojo.cache("dijit.form" , "templates/DropDownButton.html"),

	_fillContent: function(){
		// Overrides Button._fillContent().
		//
		// My inner HTML contains both the button contents and a drop down widget, like
		// <DropDownButton>  <span>push me</span>  <Menu> ... </Menu> </DropDownButton>
		// The first node is assumed to be the button content. The widget is the popup.

		if(this.srcNodeRef){ // programatically created buttons might not define srcNodeRef
			//FIXME: figure out how to filter out the widget and use all remaining nodes as button
			//	content, not just nodes[0]
			var nodes = dojo.query("*", this.srcNodeRef);
			dijit.form.DropDownButton.superclass._fillContent.call(this, nodes[0]);

			// save pointer to srcNode so we can grab the drop down widget after it's instantiated
			this.dropDownContainer = this.srcNodeRef;
		}
	},

	startup: function(){
		if(this._started){ return; }

		// the child widget from srcNodeRef is the dropdown widget.  Insert it in the page DOM,
		// make it invisible, and store a reference to pass to the popup code.
		if(!this.dropDown){
			var dropDownNode = dojo.query("[widgetId]", this.dropDownContainer)[0];
			this.dropDown = dijit.byNode(dropDownNode);
			delete this.dropDownContainer;
		}
		dijit.popup.moveOffScreen(this.dropDown.domNode);

		this.inherited(arguments);
	},

	isLoaded: function(){
		// Returns whether or not we are loaded - if our dropdown has an href,
		// then we want to check that.
		var dropDown = this.dropDown;
		return (!dropDown.href || dropDown.isLoaded);
	},

	loadDropDown: function(){
		// Loads our dropdown
		var dropDown = this.dropDown;
		if(!dropDown){ return; }
		if(!this.isLoaded()){
			var handler = dojo.connect(dropDown, "onLoad", this, function(){
				dojo.disconnect(handler);
				this.openDropDown();
			});
			dropDown.refresh();
		}else{
			this.openDropDown();
		}
	},

	isFocusable: function(){
		// Overridden so that focus is handled by the _HasDropDown mixin, not by
		// the _FormWidget mixin.
		return this.inherited(arguments) && !this._mouseDown;
	}
});

dojo.declare("dijit.form.ComboButton", dijit.form.DropDownButton, {
	// summary:
	//		A combination button and drop-down button.
	//		Users can click one side to "press" the button, or click an arrow
	//		icon to display the drop down.
	//
	// example:
	// |	<button dojoType="dijit.form.ComboButton" onClick="...">
	// |		<span>Hello world</span>
	// |		<div dojoType="dijit.Menu">...</div>
	// |	</button>
	//
	// example:
	// |	var button1 = new dijit.form.ComboButton({label: "hello world", onClick: foo, dropDown: "myMenu"});
	// |	dojo.body().appendChild(button1.domNode);
	//

	templateString: dojo.cache("dijit.form", "templates/ComboButton.html"),

	attributeMap: dojo.mixin(dojo.clone(dijit.form.Button.prototype.attributeMap), {
		id: "",
		tabIndex: ["focusNode", "titleNode"],
		title: "titleNode"
	}),

	// optionsTitle: String
	//		Text that describes the options menu (accessibility)
	optionsTitle: "",

	baseClass: "dijitComboButton",

	_focusedNode: null,

	postCreate: function(){
		this.inherited(arguments);
		this._focalNodes = [this.titleNode, this._popupStateNode];
		var isIE = dojo.isIE;
		dojo.forEach(this._focalNodes, dojo.hitch(this, function(node){
			this.connect(node, isIE? "onactivate" : "onfocus", this._onNodeFocus);
			this.connect(node, isIE? "ondeactivate" : "onblur", this._onNodeBlur);
		}));
		if(isIE && (isIE < 8 || dojo.isQuirks)){ // fixed in IE8/strict
			with(this.titleNode){ // resize BUTTON tag so parent TD won't inherit extra padding
				style.width = scrollWidth + "px";
				this.connect(this.titleNode, "onresize", function(){
					setTimeout( function(){ style.width = scrollWidth + "px"; }, 0);
				});
			}
		}
	},

	_onNodeFocus: function(evt){
		this._focusedNode = evt.currentTarget;
		var fnc = this._focusedNode == this.focusNode ? "dijitDownArrowButtonFocused" : "dijitButtonContentsFocused";
		dojo.addClass(this._focusedNode, fnc);
	},

	_onNodeBlur: function(evt){
		var fnc = evt.currentTarget == this.focusNode ? "dijitDownArrowButtonFocused" : "dijitButtonContentsFocused";
		dojo.removeClass(evt.currentTarget, fnc);
	},

	_onBlur: function(){
		this.inherited(arguments);
		this._focusedNode = null;
	},
	
	_onButtonKeyPress: function(/*Event*/ evt){
		// summary:
		//		Handler for right arrow key when focus is on left part of button
		if(evt.charOrCode == dojo.keys[this.isLeftToRight() ? "RIGHT_ARROW" : "LEFT_ARROW"]){
			dijit.focus(this._popupStateNode);
			dojo.stopEvent(evt);
		}
	},

	_onArrowKeyPress: function(/*Event*/ evt){
		// summary:
		//		Handler for left arrow key when focus is on right part of button
		if(evt.charOrCode == dojo.keys[this.isLeftToRight() ? "LEFT_ARROW" : "RIGHT_ARROW"]){
			dijit.focus(this.titleNode);
			dojo.stopEvent(evt);
		}
	},
	
	focus: function(/*String*/ position){
		// summary:
		//		Focuses this widget to according to position, if specified,
		//		otherwise on arrow node
		// position:
		//		"start" or "end"
		
		dijit.focus(position == "start" ? this.titleNode : this._popupStateNode);
	}
});

dojo.declare("dijit.form.ToggleButton", dijit.form.Button, {
	// summary:
	//		A button that can be in two states (checked or not).
	//		Can be base class for things like tabs or checkbox or radio buttons

	baseClass: "dijitToggleButton",

	// checked: Boolean
	//		Corresponds to the native HTML <input> element's attribute.
	//		In markup, specified as "checked='checked'" or just "checked".
	//		True if the button is depressed, or the checkbox is checked,
	//		or the radio button is selected, etc.
	checked: false,

	attributeMap: dojo.mixin(dojo.clone(dijit.form.Button.prototype.attributeMap), {
		checked:"focusNode"
	}),

	_clicked: function(/*Event*/ evt){
		this.attr('checked', !this.checked);
	},

	_setCheckedAttr: function(/*Boolean*/ value){
		this.checked = value;
		dojo.attr(this.focusNode || this.domNode, "checked", value);
		dijit.setWaiState(this.focusNode || this.domNode, "pressed", value);
		this._setStateClass();
		this._handleOnChange(value, true);
	},

	setChecked: function(/*Boolean*/ checked){
		// summary:
		//		Deprecated.   Use attr('checked', true/false) instead.
		dojo.deprecated("setChecked("+checked+") is deprecated. Use attr('checked',"+checked+") instead.", "", "2.0");
		this.attr('checked', checked);
	},

	reset: function(){
		// summary:
		//		Reset the widget's value to what it was at initialization time

		this._hasBeenBlurred = false;

		// set checked state to original setting
		this.attr('checked', this.params.checked || false);
	}
});
