70 lines
2.6 KiB
JavaScript
70 lines
2.6 KiB
JavaScript
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/*
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*
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* Copyright (c) 2010 C. F., Wong (<a href="http://cloudgen.w0ng.hk">Cloudgen Examplet Store</a>)
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* Licensed under the MIT License:
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* http://www.opensource.org/licenses/mit-license.php
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*
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*/
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(function($,len,createRange,duplicate){
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$.fn.caret=function(options,opt2){
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var start,end,t=this[0],browser=$.browser.msie;
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if(typeof options==="object" && typeof options.start==="number" && typeof options.end==="number") {
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start=options.start;
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end=options.end;
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} else if(typeof options==="number" && typeof opt2==="number"){
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start=options;
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end=opt2;
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} else if(typeof options==="string"){
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if((start=t.value.indexOf(options))>-1) end=start+options[len];
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else start=null;
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} else if(Object.prototype.toString.call(options)==="[object RegExp]"){
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var re=options.exec(t.value);
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if(re != null) {
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start=re.index;
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end=start+re[0][len];
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}
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}
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if(typeof start!="undefined"){
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if(browser){
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var selRange = this[0].createTextRange();
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selRange.collapse(true);
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selRange.moveStart('character', start);
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selRange.moveEnd('character', end-start);
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selRange.select();
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} else {
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this[0].selectionStart=start;
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this[0].selectionEnd=end;
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}
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this[0].focus();
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return this
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} else {
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if(browser){
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var selection=document.selection;
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if (this[0].tagName.toLowerCase() != "textarea") {
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var val = this.val(),
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range = selection[createRange]()[duplicate]();
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range.moveEnd("character", val[len]);
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var s = (range.text == "" ? val[len]:val.lastIndexOf(range.text));
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range = selection[createRange]()[duplicate]();
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range.moveStart("character", -val[len]);
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var e = range.text[len];
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} else {
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var range = selection[createRange](),
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stored_range = range[duplicate]();
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stored_range.moveToElementText(this[0]);
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stored_range.setEndPoint('EndToEnd', range);
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var s = stored_range.text[len] - range.text[len],
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e = s + range.text[len]
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}
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} else {
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var s=t.selectionStart,
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e=t.selectionEnd;
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}
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var te=t.value.substring(s,e);
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return {start:s,end:e,text:te,replace:function(st){
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return t.value.substring(0,s)+st+t.value.substring(e,t.value[len])
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}}
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}
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}
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})(jQuery,"length","createRange","duplicate");
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