43 lines
11 KiB
JavaScript
43 lines
11 KiB
JavaScript
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/*!
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* a-tools 1.5.2
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*
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* Copyright (c) 2009 Andrey Kramarev(andrey.kramarev[at]ampparit.com), Ampparit Inc. (www.ampparit.com)
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* Licensed under the MIT license.
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* http://www.ampparit.fi/a-tools/license.txt
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*
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* Basic usage:
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<textarea></textarea>
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<input type="text" />
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// Get current selection
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var sel = $("textarea").getSelection()
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// Replace current selection
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$("input").replaceSelection("foo");
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// Count characters
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alert($("textarea").countCharacters());
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// Set max length without callback function
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$("textarea").setMaxLength(7);
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// Set max length with callback function which will be called when limit is exceeded
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$("textarea").setMaxLength(10, function() {
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alert("hello")
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});
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// Removing limit:
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$("textarea").setMaxLength(-1);
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// Insert text at current caret position
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$("#textarea").insertAtCaretPos("hello");
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// Set caret position (1 = beginning, -1 = end)
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$("#textArea").setCaretPos(10);
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// Set Selection
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$("#textArea").setSelection(10,15);
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*/
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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
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