Created
June 19, 2015 01:34
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Identize
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title></title> | |
| </head> | |
| <body> | |
| <textarea cols="50" rows="10" id="ide"></textarea> | |
| </body> | |
| <script type="text/javascript"> | |
| /** | |
| * Identize | |
| * @author Marcelo Camargo | |
| * https://github.com/haskellcamargo | |
| */ | |
| HTMLTextAreaElement.prototype.identize = function(spaceNum) { | |
| this.onkeydown = function(e) { | |
| // Verify if tab | |
| if ((e.keyCode | e.which) === 9) { | |
| // Get content on the right and left | |
| var left = this.value.substr(0, this.selectionStart); | |
| var right = this.value.substr(this.selectionEnd); | |
| this.value = left + " ".repeat(spaceNum) + right; | |
| // Put the cursor in the correct position | |
| selectionPosition = left.length + spaceNum | |
| this.selectionStart = selectionPosition; | |
| this.selectionEnd = selectionPosition; | |
| // Prevent the default browser action to jump for another form | |
| e.preventDefault(); | |
| } | |
| } | |
| }; | |
| document.getElementById("ide").identize(4); | |
| </script> | |
| </html> |
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