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-/***********************************************************************
- Masked Input version 1.1
-************************************************************************
-Author: Kendall Conrad
-Home page: http://www.angelwatt.com/coding/masked_input.php
-Created: 2008-12-16
-Modified: 2010-04-14
-Description:
-License: This work is licensed under a Creative Commons Attribution-Share Alike
- 3.0 United States License http://creativecommons.org/licenses/by-sa/3.0/us/
-
-Argument pieces:
-- elm: [req] text input node to apply the mask on
-- format: [req] string format for the mask
-- allowed: [opt, '0123456789'] string with chars allowed to be typed
-- sep: [opt, '\/:-'] string of char(s) used as separators in mask
-- typeon: [opt, '_YMDhms'] string of chars in mask that can be typed on
-- onbadkey: [opt, null] function to run when user types a unallowed key
-- badkeywait: [opt, 0] used with onbadkey. Indicates how long (in ms) to lock
- text input for onbadkey function to run
-***********************************************************************/
-function MaskedInput(args)
-{
- if (args['elm'] === null || args['format'] === null) { return false; }
- var el = args['elm'],
- format = args['format'],
- allowed = args['allowed'] || '0123456789',
- sep = args['separator'] || '\/:-',
- open = args['typeon'] || '_YMDhms',
- onbadkey = args['onbadkey'] || function(){},
- badwait = args['badkeywait'] || 0;
-
- var locked = false, hold = 0;
- el.value = format;
- // Assign events
- el.onkeydown = KeyHandlerDown; //
- el.onkeypress = KeyHandlerPress; // add event handlers to element
- el.onkeyup = KeyHandlerUp; //
-
- function GetKey(code)
- {
- code = code || window.event, ch = '';
- var keyCode = code.which, evt = code.type;
- if (keyCode == null) { keyCode = code.keyCode; }
- if (keyCode === null) { return ''; } // no key, no play
- // deal with special keys
- switch (keyCode) {
- case 8: ch = 'bksp'; break;
- case 46: // handle del and . both being 46
- ch = (evt == 'keydown') ? 'del' : '.'; break;
- case 16: ch = 'shift'; break;//shift
- case 0:/*CRAP*/ case 9:/*TAB*/ case 13:/*ENTER*/
- ch = 'etc'; break;
- case 37: case 38: case 39: case 40: // arrow keys
- ch = (!code.shiftKey &&
- (code.charCode != 39 && code.charCode !== undefined)) ?
- 'etc' : String.fromCharCode(keyCode);
- break;
- // default to thinking it's a character or digit
- default: ch = String.fromCharCode(keyCode);
- }
- return ch;
- }
- function KeyHandlerDown(e)
- {
- e = e || event;
- if (locked) { return false; }
- var key = GetKey(e);
- if (el.value == '') { el.value = format; SetTextCursor(el,0); }
- // Only do update for bksp del
- if (key == 'bksp' || key == 'del') { Update(key); return false; }
- else if (key == 'etc' || key == 'shift') { return true; }
- else { return true; }
- }
- function KeyHandlerPress(e)
- {
- e = e || event;
- if (locked) { return false; }
- var key = GetKey(e);
- // Check if modifier key is being pressed; command
- if (key=='etc' || e.metaKey || e.ctrlKey || e.altKey) { return true; }
- if (key != 'bksp' && key != 'del' && key != 'etc' && key != 'shift') {
- if (!GoodOnes(key)) { return false; }
- return Update(key);
- }
- else { return false; }
- }
- function KeyHandlerUp(e) { hold = 0; }
- function Update(key)
- {
- var p = GetTextCursor(el), c = el.value, val = '';
- // Handle keys now
- switch (true) {
- case (allowed.indexOf(key) != -1):
- if (++p > format.length) { return false; } // if text csor at end
- // Handle cases where user places csor before separator
- while (sep.indexOf(c.charAt(p-1)) != -1 && p <= format.length) { p++; }
- val = c.substr(0, p-1) + key + c.substr(p);
- // Move csor up a spot if next char is a separator char
- if (allowed.indexOf(c.charAt(p)) == -1
- && open.indexOf(c.charAt(p)) == -1) { p++; }
- break;
- case (key=='bksp'): // backspace
- if (--p < 0) return false; // at start of field
- // If previous char is a separator, move a little more
- while (allowed.indexOf(c.charAt(p)) == -1
- && open.indexOf(c.charAt(p)) == -1
- && p > 1) { p--; }
- val = c.substr(0, p) + format.substr(p,1) + c.substr(p+1);
- break;
- case (key=='del'): // forward delete
- if (p >= c.length) { return false; } // at end of field
- // If next char is a separator and not the end of the text field
- while (sep.indexOf(c.charAt(p)) != -1
- && c.charAt(p) != '') { p++; }
- val = c.substr(0, p) + format.substr(p,1) + c.substr(p+1);
- p++; // Move position forward
- break;
- case (key=='etc'): return true; // Catch other allowed chars
- default: return false; // Ignore the rest
- }
- el.value = ''; // blank it first (Firefox issue)
- el.value = val; // put updated value back in
- SetTextCursor(el, p); // Set the text cursor
- return false;
- }
- function GetTextCursor(node)
- {
- try {
- if (node.selectionStart >= 0) { return node.selectionStart; }
- else if (document.selection) {// IE
- var ntxt = node.value; // getting starting text
- var rng = document.selection.createRange();
- rng.text = '|%|';
- var start = node.value.indexOf('|%|');
- rng.moveStart('character', -3);
- rng.text = '';
- // put starting text back in,
- // fixes issue if all text was highlighted
- node.value = ntxt;
- return start;
- } return -1;
- } catch(e) { return false; }
- }
- function SetTextCursor(node, pos)
- {
- try {
- if (node.selectionStart) {
- node.focus();
- node.setSelectionRange(pos,pos);
- }
- else if (node.createTextRange) { // IE
- var rng = node.createTextRange();
- rng.move('character', pos);
- rng.select();
- }
- } catch(e) { return false; }
- }
- function GoodOnes(k)
- {
- if (allowed.indexOf(k) == -1 && k!='bksp' && k!='del' && k!='etc') {
- var p = GetTextCursor(el); // Need to ensure cursor position not lost
- locked = true; onbadkey();
- // Hold lock long enough for onbadkey function to run
- setTimeout(function(){locked=false; SetTextCursor(el,p);}, badwait);
- return false;
- } return true;
- }
- function resetField() {
- el.value = format;
- }
- function setAllowed(a) {
- allowed = a;
- resetField();
- }
- function setFormat(f) {
- format = f;
- resetField();
- }
- function setSeparator(s) {
- sep = s;
- resetField();
- }
- function setTypeon(t) {
- open = t;
- resetField();
- }
- return {
- resetField:resetField,
- setAllowed:setAllowed,
- setFormat:setFormat,
- setSeparator:setSeparator,
- setTypeon:setTypeon
- }
-}
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