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Focus in a textarea in a specific position
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| <html> | |
| <head> | |
| <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> | |
| <script type="text/javascript" src="http://code.jquery.com/jquery-1.8.1.min.js"></script> | |
| <script type="text/javascript" src="jquery.focus.js"></script> | |
| <script type="text/javascript"> | |
| function showTextarea() { | |
| var rawContent = 'a § b'; | |
| var rawCursorPosition = rawContent.indexOf('§'); | |
| rawContent = rawContent.replace('§', ''); | |
| if ($('#textarea').is(':visible')) { | |
| $('#textarea').hide(); | |
| } else { | |
| $('#textarea').val(rawContent).show().focusOnPos(rawCursorPosition); | |
| console.debug($('#textarea').getFocusPos()); | |
| setTimeout(function() { | |
| $('#textarea').insertOnFocus('c'); | |
| }, 2000); | |
| } | |
| } | |
| </script> | |
| </head> | |
| <body> | |
| <a href="#" style="display: block;" onclick="showTextarea(); return false;">Show/Hide</a> | |
| <textarea id="textarea" style="display: none"></textarea> | |
| </body> | |
| </html> |
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| jQuery.fn.extend({ | |
| getFocusPos: function() { | |
| if (document.selection) { // IE | |
| var sel = document.selection.createRange(); | |
| var stored_range = sel.duplicate(); | |
| stored_range.moveToElementText(this[0]); | |
| stored_range.setEndPoint('EndToEnd', sel); | |
| return stored_range.text.length - sel.text.length; | |
| } else if (this[0].selectionStart) { // FF/Chrome | |
| return this[0].selectionStart; | |
| } | |
| }, | |
| focusOnPos: function(pos) { | |
| jQuery.each(this, function(i, obj) { | |
| if (this.createTextRange) { // IE | |
| var range = this.createTextRange(); | |
| range.move("character", pos); | |
| range.select(); | |
| } else if (this.setSelectionRange) { // FF/Chrome | |
| this.focus(); | |
| this.setSelectionRange(pos, pos); | |
| } else { // Default | |
| this.focus(); | |
| } | |
| }); | |
| }, | |
| insertOnFocus: function(content) { | |
| jQuery.each(this, function(i, obj) { | |
| if (document.selection) { // IE | |
| var sel = document.selection.createRange(); | |
| sel.text = content; | |
| } else if (this.selectionStart !== undefined) { // FF/Chrome | |
| var pos = this.selectionStart; | |
| this.value = this.value.substring(0, pos) + content + this.value.substring(pos); | |
| jQuery(this).focusOnPos(pos + content.length); | |
| } else { // Default | |
| this.value += content; | |
| } | |
| }); | |
| } | |
| }); |
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