/*! 
 * a-tools 1.5.2
 * 
 * Copyright (c) 2009 Andrey Kramarev(andrey.kramarev[at]ampparit.com), Ampparit Inc. (www.ampparit.com)
 * Licensed under the MIT license.
 * http://www.ampparit.fi/a-tools/license.txt
 *
 * Basic usage:
 
    <textarea></textarea>
    <input type="text" />

    // Get current selection
    var sel = $("textarea").getSelection()
    
    // Replace current selection
    $("input").replaceSelection("foo");

    // Count characters
    alert($("textarea").countCharacters());

    // Set max length without callback function
    $("textarea").setMaxLength(7);

    // Set max length with callback function which will be called when limit is exceeded
    $("textarea").setMaxLength(10, function() {
        alert("hello")
    });

    // Removing limit:
    $("textarea").setMaxLength(-1);
    
    // Insert text at current caret position
    $("#textarea").insertAtCaretPos("hello");
    
    // Set caret position (1 = beginning, -1 = end)
    $("#textArea").setCaretPos(10);
    
    // Set Selection
    $("#textArea").setSelection(10,15);

 */
var caretPositionAmp=[]; function init(){if(navigator.appName=="Microsoft Internet Explorer"){obj=document.getElementsByTagName("TEXTAREA");var b,a=0;for(a=0;a<obj.length;a++){b=obj[a];caretPositionAmp[a]=b.value.length;b.onmouseup=function(){b=document.activeElement;for(var c=0;c<obj.length;c++)if(obj[c]==b)break;b.focus();var e=document.selection.createRange(),h=b.createTextRange(),d=h.duplicate();h.moveToBookmark(e.getBookmark());d.setEndPoint("EndToStart",h);caretPositionAmp[c]=d.text.length};b.onkeyup=function(){b=document.activeElement; for(var c=0;c<obj.length;c++)if(obj[c]==b)break;b.focus();var e=document.selection.createRange(),h=b.createTextRange(),d=h.duplicate();h.moveToBookmark(e.getBookmark());d.setEndPoint("EndToStart",h);caretPositionAmp[c]=d.text.length}}}}window.onload=init; jQuery.fn.extend({getSelection:function(){var b=this.jquery?this[0]:this,a,c,e,h=0;b.onmousedown=function(){document.selection&&typeof b.selectionStart!="number"?document.selection.empty():window.getSelection().removeAllRanges()};if(document.selection){var d=document.selection.createRange(),f=0,g=0,i=0;a=document.getElementsByTagName("TEXTAREA");for(c=0;c<a.length;c++)if(a[c]==b)break;if(b.value.match(/\n/g)!=null)h=b.value.match(/\n/g).length;if(d.text){e=d.text;if(typeof b.selectionStart=="number"){a= b.selectionStart;c=b.selectionEnd;if(a==c)return{start:a,end:c,text:d.text,length:c-a}}else{a=b.createTextRange();e=a.duplicate();firstRe=a.text;a.moveToBookmark(d.getBookmark());secondRe=a.text;e.setEndPoint("EndToStart",a);if(firstRe==secondRe&&firstRe!=d.text||e.text.length>firstRe.length)return{start:caretPositionAmp[c],end:caretPositionAmp[c],text:"",length:0};a=e.text.length;c=e.text.length+d.text.length}if(h>0)for(e=0;e<=h;e++){var k=b.value.indexOf("\n",g);if(k!=-1&&k<a){g=k+1;f++;i=f}else if(k!= -1&&k>=a&&k<=c)if(k==a+1){f--;i--;g=k+1}else{g=k+1;i++}else e=h}if(d.text.indexOf("\n",0)==1)i+=2;a-=f;c-=i;return{start:a,end:c,text:d.text,length:c-a}}b.focus();if(typeof b.selectionStart=="number")a=b.selectionStart;else{d=document.selection.createRange();a=b.createTextRange();e=a.duplicate();a.moveToBookmark(d.getBookmark());e.setEndPoint("EndToStart",a);a=e.text.length}if(h>0)for(e=0;e<=h;e++){k=b.value.indexOf("\n",g);if(k!=-1&&k<a){g=k+1;f++}else e=h}a-=f;if(a==0&&typeof b.selectionStart!= "number"){a=caretPositionAmp[c];c=caretPositionAmp[c]}return{start:a,end:a,text:d.text,length:0}}else if(typeof b.selectionStart=="number"){a=b.selectionStart;c=b.selectionEnd;e=b.value.substring(b.selectionStart,b.selectionEnd);return{start:a,end:c,text:e,length:c-a}}else return{start:undefined,end:undefined,text:undefined,length:undefined}},replaceSelection:function(b){var a=this.jquery?this[0]:this,c,e;e=0;var h,d,f=0,g=0,i=a.scrollTop==undefined?0:a.scrollTop;c=document.getElementsByTagName("TEXTAREA"); for(var k=0;k<c.length;k++)if(c[k]==a)break;if(document.selection&&typeof a.selectionStart!="number"){i=document.selection.createRange();if(typeof a.selectionStart!="number"){var j;d=a.createTextRange();h=d.duplicate();c=d.text;d.moveToBookmark(i.getBookmark());j=d.text;try{h.setEndPoint("EndToStart",d)}catch(m){return this}if(c==j&&c!=i.text||h.text.length>c.length)return this}if(i.text){part=i.text;if(a.value.match(/\n/g)!=null)f=a.value.match(/\n/g).length;c=h.text.length;if(f>0)for(j=0;j<=f;j++){var l= a.value.indexOf("\n",e);if(l!=-1&&l<c){e=l+1;g++}else j=f}i.text=b;caretPositionAmp[k]=h.text.length+b.length;d.move("character",caretPositionAmp[k]);document.selection.empty();a.blur()}return this}else if(typeof a.selectionStart=="number"&&a.selectionStart!=a.selectionEnd){c=a.selectionStart;e=a.selectionEnd;a.value=a.value.substr(0,c)+b+a.value.substr(e);e=c+b.length;a.setSelectionRange(e,e);a.scrollTop=i;return this}return this},setSelection:function(b,a){b=parseInt(b);a=parseInt(a);var c=this.jquery? this[0]:this;c.focus();if(typeof c.selectionStart!="number"){re=c.createTextRange();if(re.text.length<a)a=re.text.length+1}if(a<b)return this;if(document.selection){var e=0,h=0,d=0,f=0;if(typeof c.selectionStart!="number"){re.collapse(true);re.moveEnd("character",a);re.moveStart("character",b);re.select()}else{if(typeof c.selectionStart=="number"){if(c.value.match(/\n/g)!=null)e=c.value.match(/\n/g).length;if(e>0)for(var g=0;g<=e;g++){var i=c.value.indexOf("\n",d);if(i!=-1&&i<b){d=i+1;h++;f=h}else if(i!= -1&&i>=b&&i<=a)if(i==b+1){h--;f--;d=i+1}else{d=i+1;f++}else g=e}b+=h;a+=f;c.selectionStart=b;c.selectionEnd=a}c.focus()}return this}else if(c.selectionStart||c.selectionStart==0){c.focus();window.getSelection().removeAllRanges();c.selectionStart=b;c.selectionEnd=a;c.focus();return this}},insertAtCaretPos:function(b){var a=this.jquery?this[0]:this,c,e,h,d,f,g,i;c=e=0;var k=a.scrollTop==undefined?0:a.scrollTop;i=document.getElementsByTagName("TEXTAREA");for(var j=0;j<i.length;j++)if(i[j]==a)break;a.focus(); if(document.selection&&typeof a.selectionStart!="number"){if(a.value.match(/\n/g)!=null)c=a.value.match(/\n/g).length;i=parseInt(caretPositionAmp[j]);if(c>0)for(var m=0;m<=c;m++){var l=a.value.indexOf("\n",h);if(l!=-1&&l<=i){h=l+1;i-=1;e++}}}caretPositionAmp[j]=parseInt(caretPositionAmp[j]);a.onkeyup=function(){if(document.selection&&typeof a.selectionStart!="number"){a.focus();d=document.selection.createRange();f=a.createTextRange();g=f.duplicate();f.moveToBookmark(d.getBookmark());g.setEndPoint("EndToStart", f);caretPositionAmp[j]=g.text.length}};a.onmouseup=function(){if(document.selection&&typeof a.selectionStart!="number"){a.focus();d=document.selection.createRange();f=a.createTextRange();g=f.duplicate();f.moveToBookmark(d.getBookmark());g.setEndPoint("EndToStart",f);caretPositionAmp[j]=g.text.length}};if(document.selection&&typeof a.selectionStart!="number"){d=document.selection.createRange();if(d.text.length!=0)return this;f=a.createTextRange();textLength=f.text.length;g=f.duplicate();f.moveToBookmark(d.getBookmark()); g.setEndPoint("EndToStart",f);c=g.text.length;if(caretPositionAmp[j]>0&&c==0){e=caretPositionAmp[j]-e;f.move("character",e);f.select();d=document.selection.createRange();caretPositionAmp[j]+=b.length}else if(!(caretPositionAmp[j]>=0)&&textLength==0){d=document.selection.createRange();caretPositionAmp[j]=b.length+textLength}else if(!(caretPositionAmp[j]>=0)&&c==0){f.move("character",textLength);f.select();d=document.selection.createRange();caretPositionAmp[j]=b.length+textLength}else if(!(caretPositionAmp[j]>= 0)&&c>0){f.move("character",0);document.selection.empty();f.select();d=document.selection.createRange();caretPositionAmp[j]=c+b.length}else if(caretPositionAmp[j]>=0&&caretPositionAmp[j]==textLength){if(textLength!=0){f.move("character",textLength);f.select()}else f.move("character",0);d=document.selection.createRange();caretPositionAmp[j]=b.length+textLength}else{if(caretPositionAmp[j]>=0&&c!=0&&caretPositionAmp[j]>=c){e=caretPositionAmp[j]-c;f.move("character",e)}else caretPositionAmp[j]>=0&&c!= 0&&caretPositionAmp[j]<c&&f.move("character",0);document.selection.empty();f.select();d=document.selection.createRange();caretPositionAmp[j]+=b.length}d.text=b;a.focus();return this}else if(typeof a.selectionStart=="number"&&a.selectionStart==a.selectionEnd){h=a.selectionStart+b.length;c=a.selectionStart;e=a.selectionEnd;a.value=a.value.substr(0,c)+b+a.value.substr(e);a.setSelectionRange(h,h);a.scrollTop=k;return this}return this},setCaretPos:function(b){var a=this.jquery?this[0]:this,c,e=0,h=0,d; d=document.getElementsByTagName("TEXTAREA");for(var f=0;f<d.length;f++)if(d[f]==a)break;a.focus();if(parseInt(b)==0)return this;if(parseInt(b)>0){b=parseInt(b)-1;if(document.selection&&typeof a.selectionStart=="number"&&a.selectionStart==a.selectionEnd){if(a.value.match(/\n/g)!=null)e=a.value.match(/\n/g).length;if(e>0)for(var g=0;g<=e;g++){d=a.value.indexOf("\n",c);if(d!=-1&&d<=b){c=d+1;b=parseInt(b)+1}}}}else if(parseInt(b)<0){b=parseInt(b)+1;if(document.selection&&typeof a.selectionStart!="number"){b= a.value.length+parseInt(b);if(a.value.match(/\n/g)!=null)e=a.value.match(/\n/g).length;if(e>0){for(g=0;g<=e;g++){d=a.value.indexOf("\n",c);if(d!=-1&&d<=b){c=d+1;b=parseInt(b)-1;h+=1}}b=b+h-e}}else if(document.selection&&typeof a.selectionStart=="number"){b=a.value.length+parseInt(b);if(a.value.match(/\n/g)!=null)e=a.value.match(/\n/g).length;if(e>0){b=parseInt(b)-e;for(g=0;g<=e;g++){d=a.value.indexOf("\n",c);if(d!=-1&&d<=b){c=d+1;b=parseInt(b)+1;h+=1}}}}else b=a.value.length+parseInt(b)}else return this; if(document.selection&&typeof a.selectionStart!="number"){c=document.selection.createRange();if(c.text!=0)return this;a=a.createTextRange();a.collapse(true);a.moveEnd("character",b);a.moveStart("character",b);a.select();caretPositionAmp[f]=b;return this}else if(typeof a.selectionStart=="number"&&a.selectionStart==a.selectionEnd){a.setSelectionRange(b,b);return this}return this},countCharacters:function(){var b=this.jquery?this[0]:this;if(b.value.match(/\r/g)!=null)return b.value.length-b.value.match(/\r/g).length; return b.value.length},setMaxLength:function(b,a){this.each(function(){var c=this.jquery?this[0]:this,e=c.type,h,d;if(parseInt(b)<0)b=1E8;if(e=="text")c.maxLength=b;if(e=="textarea"||e=="text"){c.onkeypress=function(f){var g=c.value.match(/\r/g);d=b;if(g!=null)d=parseInt(d)+g.length;f=f||event;g=f.keyCode;h=document.selection?document.selection.createRange().text.length>0:c.selectionStart!=c.selectionEnd;if(c.value.length>=d&&(g>47||g==32||g==0||g==13)&&!f.ctrlKey&&!f.altKey&&!h){c.value=c.value.substring(0, d);typeof a=="function"&&a();return false}};c.onkeyup=function(){var f=c.value.match(/\r/g),g=0,i=0;d=b;if(f!=null){for(var k=0;k<=f.length;k++)if(c.value.indexOf("\n",i)<=parseInt(b)){g++;i=c.value.indexOf("\n",i)+1}d=parseInt(b)+g}if(c.value.length>d){c.value=c.value.substring(0,d);typeof a=="function"&&a();return this}}}else return this});return this}});