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

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

dojo.declare(
	"dijit.form.TextBox",
	dijit.form._FormValueWidget,
	{
		//	summary:
		//		A base class for textbox form inputs

		//	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: "",

		templatePath: dojo.moduleUrl("dijit.form", "templates/TextBox.html"),
		baseClass: "dijitTextBox",

		attributeMap: dojo.delegate(dijit.form._FormValueWidget.prototype.attributeMap, {
			maxLength: "focusNode" 
		}),

		_getValueAttr: function(){
			// summary:
			//		Hook so attr('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.attr('displayedValue'), this.constraints);
		},

		_setValueAttr: function(value, /*Boolean?*/ priorityChange, /*String?*/ formattedValue){
			// summary:
			//		Hook so attr('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 && formattedValue != undefined && ((typeof formattedValue) != "number" || !isNaN(formattedValue)) && this.textbox.value != formattedValue){
				this.textbox.value = 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 attr('displayedValue', ...)
		//		updates 'value', and vice-versa.  Othewise '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: "",

		getDisplayedValue: function(){
			// summary:
			//		Deprecated.   Use attr('displayedValue') instead.
			// tags:
			//		deprecated
			dojo.deprecated(this.declaredClass+"::getDisplayedValue() is deprecated. Use attr('displayedValue') instead.", "", "2.0");
			return this.attr('displayedValue');
		},

		_getDisplayedValueAttr: function(){
			// summary:
			//		Hook so attr('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)
			
			return this.filter(this.textbox.value);
		},

		setDisplayedValue: function(/*String*/value){
			// summary:
			//		Deprecated.   Use attr('displayedValue', ...) instead.
			// tags:
			//		deprecated
			dojo.deprecated(this.declaredClass+"::setDisplayedValue() is deprecated. Use attr('displayedValue', ...) instead.", "", "2.0");
			this.attr('displayedValue', value);
		},
			
		_setDisplayedValueAttr: function(/*String*/value){
			// summary:
			//		Hook so attr('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 || value === undefined){ value = '' }
			else if(typeof value != "string"){ value = String(value) }
			this.textbox.value = value;
			this._setValueAttr(this.attr('value'), undefined, value);
		},

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

		parse: function(/* String */ value, /* Object */ constraints){
			// summary:
			//		Replacable function to convert a formatted string to a value
			// 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(e){
			if(e && e.type && /key/i.test(e.type) && e.keyCode){
				switch(e.keyCode){
					case dojo.keys.SHIFT:
					case dojo.keys.ALT:
					case dojo.keys.CTRL:
					case dojo.keys.TAB:
						return;
				}
			}
			if(this.intermediateChanges){
				var _this = this;
				// the setTimeout allows the key to post to the widget input box
				setTimeout(function(){ _this._handleOnChange(_this.attr('value'), false); }, 0);
			}
			this._refreshState();
		},

		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 shuld be the same
			this.inherited(arguments);
			if(dojo.isMoz || dojo.isOpera){
				this.connect(this.textbox, "oninput", this._onInput);
			}else{
				this.connect(this.textbox, "onkeydown", this._onInput);
				this.connect(this.textbox, "onkeyup", this._onInput);
				this.connect(this.textbox, "onpaste", this._onInput);
				this.connect(this.textbox, "oncut", this._onInput);
			}

			/*#5297:if(this.srcNodeRef){
				dojo.style(this.textbox, "cssText", this.style);
				this.textbox.className += " " + this["class"];
			}*/
			this._layoutHack();
		},

		_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 attr('value', ...)
			//		and attr('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 = dojo.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.attr('value'), true);
		},

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

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

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

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?
	var _window = dojo.global;
	var _document = dojo.doc;
	element = dojo.byId(element);
	if(isNaN(start)){ start = 0; }
	if(isNaN(stop)){ stop = element.value ? element.value.length : 0; }
	element.focus();
	if(_document["selection"] && dojo.body()["createTextRange"]){ // IE
		if(element.createTextRange){
			var range = element.createTextRange();
			with(range){
				collapse(true);
				moveStart("character", start);
				moveEnd("character", stop);
				select();
			}
		}
	}else if(_window["getSelection"]){
		var selection = _window.getSelection();	// TODO: unused, remove
		// FIXME: does this work on Safari?
		if(element.setSelectionRange){
			element.setSelectionRange(start, stop);
		}
	}
};