//MooTools More, <http://mootools.net/more>. Copyright (c) 2006-2009 Aaron Newton <http://clientcide.com/>, Valerio Proietti <http://mad4milk.net> & the MooTools team <http://mootools.net/developers>, MIT Style License.

/*
---

script: More.js

description: MooTools More

license: MIT-style license

authors:
- Guillermo Rauch
- Thomas Aylott
- Scott Kyle

requires:
- core:1.2.4/MooTools

provides: [MooTools.More]

...
*/

MooTools.More = {
	'version': '1.2.4.4',
	'build': '6f6057dc645fdb7547689183b2311063bd653ddf'
};

/*
---

script: Element.Forms.js

description: Extends the Element native object to include methods useful in managing inputs.

license: MIT-style license

authors:
- Aaron Newton

requires:
- core:1.2.4/Element
- /MooTools.More

provides: [Element.Forms]

...
*/

Element.implement({

	tidy: function(){
		this.set('value', this.get('value').tidy());
	},

	getTextInRange: function(start, end){
		return this.get('value').substring(start, end);
	},

	getSelectedText: function(){
		if (this.setSelectionRange) return this.getTextInRange(this.getSelectionStart(), this.getSelectionEnd());
		return document.selection.createRange().text;
	},

	getSelectedRange: function() {
		if ($defined(this.selectionStart)) return {start: this.selectionStart, end: this.selectionEnd};
		var pos = {start: 0, end: 0};
		var range = this.getDocument().selection.createRange();
		if (!range || range.parentElement() != this) return pos;
		var dup = range.duplicate();
		if (this.type == 'text') {
			pos.start = 0 - dup.moveStart('character', -100000);
			pos.end = pos.start + range.text.length;
		} else {
			var value = this.get('value');
			var offset = value.length;
			dup.moveToElementText(this);
			dup.setEndPoint('StartToEnd', range);
			if(dup.text.length) offset -= value.match(/[\n\r]*$/)[0].length;
			pos.end = offset - dup.text.length;
			dup.setEndPoint('StartToStart', range);
			pos.start = offset - dup.text.length;
		}
		return pos;
	},

	getSelectionStart: function(){
		return this.getSelectedRange().start;
	},

	getSelectionEnd: function(){
		return this.getSelectedRange().end;
	},

	setCaretPosition: function(pos){
		if (pos == 'end') pos = this.get('value').length;
		this.selectRange(pos, pos);
		return this;
	},

	getCaretPosition: function(){
		return this.getSelectedRange().start;
	},

	selectRange: function(start, end){
		if (this.setSelectionRange) {
			this.focus();
			this.setSelectionRange(start, end);
		} else {
			var value = this.get('value');
			var diff = value.substr(start, end - start).replace(/\r/g, '').length;
			start = value.substr(0, start).replace(/\r/g, '').length;
			var range = this.createTextRange();
			range.collapse(true);
			range.moveEnd('character', start + diff);
			range.moveStart('character', start);
			range.select();
		}
		return this;
	},

	insertAtCursor: function(value, select){
		var pos = this.getSelectedRange();
		var text = this.get('value');
		this.set('value', text.substring(0, pos.start) + value + text.substring(pos.end, text.length));
		if ($pick(select, true)) this.selectRange(pos.start, pos.start + value.length);
		else this.setCaretPosition(pos.start + value.length);
		return this;
	},

	insertAroundCursor: function(options, select){
		options = $extend({
			before: '',
			defaultMiddle: '',
			after: ''
		}, options);
		var value = this.getSelectedText() || options.defaultMiddle;
		var pos = this.getSelectedRange();
		var text = this.get('value');
		if (pos.start == pos.end){
			this.set('value', text.substring(0, pos.start) + options.before + value + options.after + text.substring(pos.end, text.length));
			this.selectRange(pos.start + options.before.length, pos.end + options.before.length + value.length);
		} else {
			var current = text.substring(pos.start, pos.end);
			this.set('value', text.substring(0, pos.start) + options.before + current + options.after + text.substring(pos.end, text.length));
			var selStart = pos.start + options.before.length;
			if ($pick(select, true)) this.selectRange(selStart, selStart + current.length);
			else this.setCaretPosition(selStart + text.length);
		}
		return this;
	}

});