define("dijit/form/_TextBoxMixin", [
	"dojo/_base/array", // array.forEach
	"dojo/_base/declare", // declare
	"dojo/dom", // dom.byId
	"dojo/_base/event", // event.stop
	"dojo/keys", // keys.ALT keys.CAPS_LOCK keys.CTRL keys.META keys.SHIFT
	"dojo/_base/lang", // lang.mixin
	"dojo/on", // on
	"../main"	// for exporting dijit._setSelectionRange, dijit.selectInputText
], function(array, declare, dom, event, keys, lang, on, dijit){

// module:
//		dijit/form/_TextBoxMixin

var _TextBoxMixin = declare("dijit.form._TextBoxMixin", null, {
	// summary:
	//		A mixin for textbox form input widgets

	// trim: Boolean
	//		Removes leading and trailing whitespace if true.  Default is false.
	trim: false,

	// uppercase: Boolean
	//		Converts all characters to uppercase if true.  Default is false.
	uppercase: false,

	// lowercase: Boolean
	//		Converts all characters to lowercase if true.  Default is false.
	lowercase: false,

	// propercase: Boolean
	//		Converts the first character of each word to uppercase if true.
	propercase: false,

	// maxLength: String
	//		HTML INPUT tag maxLength declaration.
	maxLength: "",

	// selectOnClick: [const] Boolean
	//		If true, all text will be selected when focused with mouse
	selectOnClick: false,

	// placeHolder: String
	//		Defines a hint to help users fill out the input field (as defined in HTML 5).
	//		This should only contain plain text (no html markup).
	placeHolder: "",

	_getValueAttr: function(){
		// summary:
		//		Hook so get('value') works as we like.
		// description:
		//		For `dijit/form/TextBox` this basically returns the value of the `<input>`.
		//
		//		For `dijit/form/MappedTextBox` subclasses, which have both
		//		a "displayed value" and a separate "submit value",
		//		This treats the "displayed value" as the master value, computing the
		//		submit value from it via this.parse().
		return this.parse(this.get('displayedValue'), this.constraints);
	},

	_setValueAttr: function(value, /*Boolean?*/ priorityChange, /*String?*/ formattedValue){
		// summary:
		//		Hook so set('value', ...) works.
		//
		// description:
		//		Sets the value of the widget to "value" which can be of
		//		any type as determined by the widget.
		//
		// value:
		//		The visual element value is also set to a corresponding,
		//		but not necessarily the same, value.
		//
		// formattedValue:
		//		If specified, used to set the visual element value,
		//		otherwise a computed visual value is used.
		//
		// priorityChange:
		//		If true, an onChange event is fired immediately instead of
		//		waiting for the next blur event.

		var filteredValue;
		if(value !== undefined){
			// TODO: this is calling filter() on both the display value and the actual value.
			// I added a comment to the filter() definition about this, but it should be changed.
			filteredValue = this.filter(value);
			if(typeof formattedValue != "string"){
				if(filteredValue !== null && ((typeof filteredValue != "number") || !isNaN(filteredValue))){
					formattedValue = this.filter(this.format(filteredValue, this.constraints));
				}else{ formattedValue = ''; }
			}
		}
		if(formattedValue != null /* and !undefined */ && ((typeof formattedValue) != "number" || !isNaN(formattedValue)) && this.textbox.value != formattedValue){
			this.textbox.value = formattedValue;
			this._set("displayedValue", this.get("displayedValue"));
		}

		if(this.textDir == "auto"){
			this.applyTextDir(this.focusNode, formattedValue);
		}

		this.inherited(arguments, [filteredValue, priorityChange]);
	},

	// displayedValue: String
	//		For subclasses like ComboBox where the displayed value
	//		(ex: Kentucky) and the serialized value (ex: KY) are different,
	//		this represents the displayed value.
	//
	//		Setting 'displayedValue' through set('displayedValue', ...)
	//		updates 'value', and vice-versa.  Otherwise 'value' is updated
	//		from 'displayedValue' periodically, like onBlur etc.
	//
	//		TODO: move declaration to MappedTextBox?
	//		Problem is that ComboBox references displayedValue,
	//		for benefit of FilteringSelect.
	displayedValue: "",

	_getDisplayedValueAttr: function(){
		// summary:
		//		Hook so get('displayedValue') works.
		// description:
		//		Returns the displayed value (what the user sees on the screen),
		//		after filtering (ie, trimming spaces etc.).
		//
		//		For some subclasses of TextBox (like ComboBox), the displayed value
		//		is different from the serialized value that's actually
		//		sent to the server (see `dijit/form/ValidationTextBox.serialize()`)

		// TODO: maybe we should update this.displayedValue on every keystroke so that we don't need
		// this method
		// TODO: this isn't really the displayed value when the user is typing
		return this.filter(this.textbox.value);
	},

	_setDisplayedValueAttr: function(/*String*/ value){
		// summary:
		//		Hook so set('displayedValue', ...) works.
		// description:
		//		Sets the value of the visual element to the string "value".
		//		The widget value is also set to a corresponding,
		//		but not necessarily the same, value.

		if(value == null /* or undefined */){ value = '' }
		else if(typeof value != "string"){ value = String(value) }

		this.textbox.value = value;

		// sets the serialized value to something corresponding to specified displayedValue
		// (if possible), and also updates the textbox.value, for example converting "123"
		// to "123.00"
		this._setValueAttr(this.get('value'), undefined);

		this._set("displayedValue", this.get('displayedValue'));

		// textDir support
		if(this.textDir == "auto"){
			this.applyTextDir(this.focusNode, value);
		}
	},

	format: function(value /*=====, constraints =====*/){
		// summary:
		//		Replaceable function to convert a value to a properly formatted string.
		// value: String
		// constraints: Object
		// tags:
		//		protected extension
		return value == null /* or undefined */ ? "" : (value.toString ? value.toString() : value);
	},

	parse: function(value /*=====, constraints =====*/){
		// summary:
		//		Replaceable function to convert a formatted string to a value
		// value: String
		// constraints: Object
		// tags:
		//		protected extension

		return value;	// String
	},

	_refreshState: function(){
		// summary:
		//		After the user types some characters, etc., this method is
		//		called to check the field for validity etc.  The base method
		//		in `dijit/form/TextBox` does nothing, but subclasses override.
		// tags:
		//		protected
	},

	/*=====
	onInput: function(event){
		// summary:
		//		Connect to this function to receive notifications of various user data-input events.
		//		Return false to cancel the event and prevent it from being processed.
		// event:
		//		keydown | keypress | cut | paste | input
		// tags:
		//		callback
	},
	=====*/
	onInput: function(){},

	__skipInputEvent: false,
	_onInput: function(/*Event*/ evt){
		// summary:
		//		Called AFTER the input event has happened

		// set text direction according to textDir that was defined in creation
		if(this.textDir == "auto"){
			this.applyTextDir(this.focusNode, this.focusNode.value);
		}

		this._processInput(evt);
	},

	_processInput: function(/*Event*/ evt){
		// summary:
		//		Default action handler for user input events

		this._refreshState();

		// In case someone is watch()'ing for changes to displayedValue
		this._set("displayedValue", this.get("displayedValue"));
	},

	postCreate: function(){
		// setting the value here is needed since value="" in the template causes "undefined"
		// and setting in the DOM (instead of the JS object) helps with form reset actions
		this.textbox.setAttribute("value", this.textbox.value); // DOM and JS values should be the same

		this.inherited(arguments);

		// normalize input events to reduce spurious event processing
		//	onkeydown: do not forward modifier keys
		//		       set charOrCode to numeric keycode
		//	onkeypress: do not forward numeric charOrCode keys (already sent through onkeydown)
		//	onpaste & oncut: set charOrCode to 229 (IME)
		//	oninput: if primary event not already processed, set charOrCode to 229 (IME), else do not forward
		var handleEvent = function(e){
			var charOrCode;
			if(e.type == "keydown"){
				charOrCode = e.keyCode;
				switch(charOrCode){ // ignore state keys
					case keys.SHIFT:
					case keys.ALT:
					case keys.CTRL:
					case keys.META:
					case keys.CAPS_LOCK:
					case keys.NUM_LOCK:
					case keys.SCROLL_LOCK:
						return;
				}
				if(!e.ctrlKey && !e.metaKey && !e.altKey){ // no modifiers
					switch(charOrCode){ // ignore location keys
						case keys.NUMPAD_0:
						case keys.NUMPAD_1:
						case keys.NUMPAD_2:
						case keys.NUMPAD_3:
						case keys.NUMPAD_4:
						case keys.NUMPAD_5:
						case keys.NUMPAD_6:
						case keys.NUMPAD_7:
						case keys.NUMPAD_8:
						case keys.NUMPAD_9:
						case keys.NUMPAD_MULTIPLY:
						case keys.NUMPAD_PLUS:
						case keys.NUMPAD_ENTER:
						case keys.NUMPAD_MINUS:
						case keys.NUMPAD_PERIOD:
						case keys.NUMPAD_DIVIDE:
							return;
					}
					if((charOrCode >= 65 && charOrCode <= 90) || (charOrCode >= 48 && charOrCode <= 57) || charOrCode == keys.SPACE){
						return; // keypress will handle simple non-modified printable keys
					}
					var named = false;
					for(var i in keys){
						if(keys[i] === e.keyCode){
							named = true;
							break;
						}
					}
					if(!named){ return; } // only allow named ones through
				}
			}
			charOrCode = e.charCode >= 32 ? String.fromCharCode(e.charCode) : e.charCode;
			if(!charOrCode){
				charOrCode = (e.keyCode >= 65 && e.keyCode <= 90) || (e.keyCode >= 48 && e.keyCode <= 57) || e.keyCode == keys.SPACE ? String.fromCharCode(e.keyCode) : e.keyCode;
			}
			if(!charOrCode){
				charOrCode = 229; // IME
			}
			if(e.type == "keypress"){
				if(typeof charOrCode != "string"){ return; }
				if((charOrCode >= 'a' && charOrCode <= 'z') || (charOrCode >= 'A' && charOrCode <= 'Z') || (charOrCode >= '0' && charOrCode <= '9') || (charOrCode === ' ')){
					if(e.ctrlKey || e.metaKey || e.altKey){ return; } // can only be stopped reliably in keydown
				}
			}
			if(e.type == "input"){
				if(this.__skipInputEvent){ // duplicate event
					this.__skipInputEvent = false;
					return;
				}
			}else{
				this.__skipInputEvent = true;
			}
			// create fake event to set charOrCode and to know if preventDefault() was called
			var faux = { faux: true }, attr;
			for(attr in e){
				if(attr != "layerX" && attr != "layerY"){ // prevent WebKit warnings
					var v = e[attr];
					if(typeof v != "function" && typeof v != "undefined"){ faux[attr] = v; }
				}
			}
			lang.mixin(faux, {
				charOrCode: charOrCode,
				_wasConsumed: false,
				preventDefault: function(){
					faux._wasConsumed = true;
					e.preventDefault();
				},
				stopPropagation: function(){ e.stopPropagation(); }
			});
			// give web page author a chance to consume the event
			//console.log(faux.type + ', charOrCode = (' + (typeof charOrCode) + ') ' + charOrCode + ', ctrl ' + !!faux.ctrlKey + ', alt ' + !!faux.altKey + ', meta ' + !!faux.metaKey + ', shift ' + !!faux.shiftKey);
			if(this.onInput(faux) === false){ // return false means stop
				faux.preventDefault();
				faux.stopPropagation();
			}
			if(faux._wasConsumed){ return; } // if preventDefault was called
			this.defer(function(){ this._onInput(faux); }); // widget notification after key has posted
		};
		this.own(on(this.textbox, "keydown, keypress, paste, cut, input, compositionend", lang.hitch(this, handleEvent)));
	},

	_blankValue: '', // if the textbox is blank, what value should be reported
	filter: function(val){
		// summary:
		//		Auto-corrections (such as trimming) that are applied to textbox
		//		value on blur or form submit.
		// description:
		//		For MappedTextBox subclasses, this is called twice
		//
		//		- once with the display value
		//		- once the value as set/returned by set('value', ...)
		//
		//		and get('value'), ex: a Number for NumberTextBox.
		//
		//		In the latter case it does corrections like converting null to NaN.  In
		//		the former case the NumberTextBox.filter() method calls this.inherited()
		//		to execute standard trimming code in TextBox.filter().
		//
		//		TODO: break this into two methods in 2.0
		//
		// tags:
		//		protected extension
		if(val === null){ return this._blankValue; }
		if(typeof val != "string"){ return val; }
		if(this.trim){
			val = lang.trim(val);
		}
		if(this.uppercase){
			val = val.toUpperCase();
		}
		if(this.lowercase){
			val = val.toLowerCase();
		}
		if(this.propercase){
			val = val.replace(/[^\s]+/g, function(word){
				return word.substring(0,1).toUpperCase() + word.substring(1);
			});
		}
		return val;
	},

	_setBlurValue: function(){
		this._setValueAttr(this.get('value'), true);
	},

	_onBlur: function(e){
		if(this.disabled){ return; }
		this._setBlurValue();
		this.inherited(arguments);
	},

	_isTextSelected: function(){
		return this.textbox.selectionStart != this.textbox.selectionEnd;
	},

	_onFocus: function(/*String*/ by){
		if(this.disabled || this.readOnly){ return; }

		// Select all text on focus via click if nothing already selected.
		// Since mouse-up will clear the selection, need to defer selection until after mouse-up.
		// Don't do anything on focus by tabbing into the widget since there's no associated mouse-up event.
		if(this.selectOnClick && by == "mouse"){
			this._selectOnClickHandle = this.connect(this.domNode, "onmouseup", function(){
				// Only select all text on first click; otherwise users would have no way to clear
				// the selection.
				this.disconnect(this._selectOnClickHandle);
				this._selectOnClickHandle = null;

				// Check if the user selected some text manually (mouse-down, mouse-move, mouse-up)
				// and if not, then select all the text
				if(!this._isTextSelected()){
					_TextBoxMixin.selectInputText(this.textbox);
				}
			});
			// in case the mouseup never comes
			this.defer(function(){ 
				if(this._selectOnClickHandle){
					this.disconnect(this._selectOnClickHandle);
					this._selectOnClickHandle = null;
				}
			}, 500); // if mouseup not received soon, then treat it as some gesture
		}
		// call this.inherited() before refreshState(), since this.inherited() will possibly scroll the viewport
		// (to scroll the TextBox into view), which will affect how _refreshState() positions the tooltip
		this.inherited(arguments);

		this._refreshState();
	},

	reset: function(){
		// Overrides `dijit/_FormWidget/reset()`.
		// Additionally resets the displayed textbox value to ''
		this.textbox.value = '';
		this.inherited(arguments);
	},

	_setTextDirAttr: function(/*String*/ textDir){
		// summary:
		//		Setter for textDir.
		// description:
		//		Users shouldn't call this function; they should be calling
		//		set('textDir', value)
		// tags:
		//		private

		// only if new textDir is different from the old one
		// and on widgets creation.
		if(!this._created
			|| this.textDir != textDir){
				this._set("textDir", textDir);
				// so the change of the textDir will take place immediately.
				this.applyTextDir(this.focusNode, this.focusNode.value);
		}
	}
});


_TextBoxMixin._setSelectionRange = dijit._setSelectionRange = function(/*DomNode*/ element, /*Number?*/ start, /*Number?*/ stop){
	if(element.setSelectionRange){
		element.setSelectionRange(start, stop);
	}
};

_TextBoxMixin.selectInputText = dijit.selectInputText = function(/*DomNode*/ element, /*Number?*/ start, /*Number?*/ stop){
	// summary:
	//		Select text in the input element argument, from start (default 0), to stop (default end).

	// TODO: use functions in _editor/selection.js?
	element = dom.byId(element);
	if(isNaN(start)){ start = 0; }
	if(isNaN(stop)){ stop = element.value ? element.value.length : 0; }
	try{
		element.focus();
		_TextBoxMixin._setSelectionRange(element, start, stop);
	}catch(e){ /* squelch random errors (esp. on IE) from unexpected focus changes or DOM nodes being hidden */ }
};

return _TextBoxMixin;
});
