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formatter.js/dist/formatter.js
96acb28 May 9, 2014
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/*!
* v0.1.4
* Copyright (c) 2014 First Opinion
* formatter.js is open sourced under the MIT license.
*
* thanks to digitalBush/jquery.maskedinput for some of the trickier
* keycode handling
*/
//
// Uses Node, AMD or browser globals to create a module. This example creates
// a global even when AMD is used. This is useful if you have some scripts
// that are loaded by an AMD loader, but they still want access to globals.
// If you do not need to export a global for the AMD case,
// see returnExports.js.
//
// If you want something that will work in other stricter CommonJS environments,
// or if you need to create a circular dependency, see commonJsStrictGlobal.js
//
// Defines a module "returnExportsGlobal" that depends another module called
// "b". Note that the name of the module is implied by the file name. It is
// best if the file name and the exported global have matching names.
//
// If the 'b' module also uses this type of boilerplate, then
// in the browser, it will create a global .b that is used below.
//
(function (root, factory) {
if (typeof define === 'function' && define.amd) {
// AMD. Register as an anonymous module.
define([], function () {
return (root.returnExportsGlobal = factory());
});
} else if (typeof exports === 'object') {
// Node. Does not work with strict CommonJS, but
// only CommonJS-like enviroments that support module.exports,
// like Node.
module.exports = factory();
} else {
root['Formatter'] = factory();
}
}(this, function () {
/*
* pattern.js
*
* Utilities to parse str pattern and return info
*
*/
var pattern = function () {
// Define module
var pattern = {};
// Match information
var DELIM_SIZE = 4;
// Our regex used to parse
var regexp = new RegExp('{{([^}]+)}}', 'g');
//
// Helper method to parse pattern str
//
var getMatches = function (pattern) {
// Populate array of matches
var matches = [], match;
while (match = regexp.exec(pattern)) {
matches.push(match);
}
return matches;
};
//
// Create an object holding all formatted characters
// with corresponding positions
//
pattern.parse = function (pattern) {
// Our obj to populate
var info = {
inpts: {},
chars: {}
};
// Pattern information
var matches = getMatches(pattern), pLength = pattern.length;
// Counters
var mCount = 0, iCount = 0, i = 0;
// Add inpts, move to end of match, and process
var processMatch = function (val) {
var valLength = val.length;
for (var j = 0; j < valLength; j++) {
info.inpts[iCount] = val.charAt(j);
iCount++;
}
mCount++;
i += val.length + DELIM_SIZE - 1;
};
// Process match or add chars
for (i; i < pLength; i++) {
if (mCount < matches.length && i === matches[mCount].index) {
processMatch(matches[mCount][1]);
} else {
info.chars[i - mCount * DELIM_SIZE] = pattern.charAt(i);
}
}
// Set mLength and return
info.mLength = i - mCount * DELIM_SIZE;
return info;
};
// Expose
return pattern;
}();
/*
* utils.js
*
* Independent helper methods (cross browser, etc..)
*
*/
var utils = function () {
// Define module
var utils = {};
// Useragent info for keycode handling
var uAgent = typeof navigator !== 'undefined' ? navigator.userAgent : null;
//
// Shallow copy properties from n objects to destObj
//
utils.extend = function (destObj) {
for (var i = 1; i < arguments.length; i++) {
for (var key in arguments[i]) {
destObj[key] = arguments[i][key];
}
}
return destObj;
};
//
// Add a given character to a string at a defined pos
//
utils.addChars = function (str, chars, pos) {
return str.substr(0, pos) + chars + str.substr(pos, str.length);
};
//
// Remove a span of characters
//
utils.removeChars = function (str, start, end) {
return str.substr(0, start) + str.substr(end, str.length);
};
//
// Return true/false is num false between bounds
//
utils.isBetween = function (num, bounds) {
bounds.sort(function (a, b) {
return a - b;
});
return num > bounds[0] && num < bounds[1];
};
//
// Helper method for cross browser event listeners
//
utils.addListener = function (el, evt, handler) {
return typeof el.addEventListener !== 'undefined' ? el.addEventListener(evt, handler, false) : el.attachEvent('on' + evt, handler);
};
//
// Helper method for cross browser implementation of preventDefault
//
utils.preventDefault = function (evt) {
return evt.preventDefault ? evt.preventDefault() : evt.returnValue = false;
};
//
// Helper method for cross browser implementation for grabbing
// clipboard data
//
utils.getClip = function (evt) {
if (evt.clipboardData) {
return evt.clipboardData.getData('Text');
}
if (window.clipboardData) {
return window.clipboardData.getData('Text');
}
};
//
// Loop over object and checking for matching properties
//
utils.getMatchingKey = function (which, keyCode, keys) {
// Loop over and return if matched.
for (var k in keys) {
var key = keys[k];
if (which === key.which && keyCode === key.keyCode) {
return k;
}
}
};
//
// Returns true/false if k is a del keyDown
//
utils.isDelKeyDown = function (which, keyCode) {
var keys = {
'backspace': {
'which': 8,
'keyCode': 8
},
'delete': {
'which': 46,
'keyCode': 46
}
};
return utils.getMatchingKey(which, keyCode, keys);
};
//
// Returns true/false if k is a del keyPress
//
utils.isDelKeyPress = function (which, keyCode) {
var keys = {
'backspace': {
'which': 8,
'keyCode': 8,
'shiftKey': false
},
'delete': {
'which': 0,
'keyCode': 46
}
};
return utils.getMatchingKey(which, keyCode, keys);
};
// //
// // Determine if keydown relates to specialKey
// //
// utils.isSpecialKeyDown = function (which, keyCode) {
// var keys = {
// 'tab': { 'which': 9, 'keyCode': 9 },
// 'enter': { 'which': 13, 'keyCode': 13 },
// 'end': { 'which': 35, 'keyCode': 35 },
// 'home': { 'which': 36, 'keyCode': 36 },
// 'leftarrow': { 'which': 37, 'keyCode': 37 },
// 'uparrow': { 'which': 38, 'keyCode': 38 },
// 'rightarrow': { 'which': 39, 'keyCode': 39 },
// 'downarrow': { 'which': 40, 'keyCode': 40 },
// 'F5': { 'which': 116, 'keyCode': 116 }
// };
// return utils.getMatchingKey(which, keyCode, keys);
// };
//
// Determine if keypress relates to specialKey
//
utils.isSpecialKeyPress = function (which, keyCode) {
var keys = {
'tab': {
'which': 0,
'keyCode': 9
},
'enter': {
'which': 13,
'keyCode': 13
},
'end': {
'which': 0,
'keyCode': 35
},
'home': {
'which': 0,
'keyCode': 36
},
'leftarrow': {
'which': 0,
'keyCode': 37
},
'uparrow': {
'which': 0,
'keyCode': 38
},
'rightarrow': {
'which': 0,
'keyCode': 39
},
'downarrow': {
'which': 0,
'keyCode': 40
},
'F5': {
'which': 116,
'keyCode': 116
}
};
return utils.getMatchingKey(which, keyCode, keys);
};
//
// Returns true/false if modifier key is held down
//
utils.isModifier = function (evt) {
return evt.ctrlKey || evt.altKey || evt.metaKey;
};
//
// Iterates over each property of object or array.
//
utils.forEach = function (collection, callback, thisArg) {
if (collection.hasOwnProperty('length')) {
for (var index = 0, len = collection.length; index < len; index++) {
if (callback.call(thisArg, collection[index], index, collection) === false) {
break;
}
}
} else {
for (var key in collection) {
if (collection.hasOwnProperty(key)) {
if (callback.call(thisArg, collection[key], key, collection) === false) {
break;
}
}
}
}
};
// Expose
return utils;
}();
/*
* pattern-matcher.js
*
* Parses a pattern specification and determines appropriate pattern for an
* input string
*
*/
var patternMatcher = function (pattern, utils) {
//
// Parse a matcher string into a RegExp. Accepts valid regular
// expressions and the catchall '*'.
// @private
//
var parseMatcher = function (matcher) {
if (matcher === '*') {
return /.*/;
}
return new RegExp(matcher);
};
//
// Parse a pattern spec and return a function that returns a pattern
// based on user input. The first matching pattern will be chosen.
// Pattern spec format:
// Array [
// Object: { Matcher(RegExp String) : Pattern(Pattern String) },
// ...
// ]
function patternMatcher(patternSpec) {
var matchers = [], patterns = [];
// Iterate over each pattern in order.
utils.forEach(patternSpec, function (patternMatcher) {
// Process single property object to obtain pattern and matcher.
utils.forEach(patternMatcher, function (patternStr, matcherStr) {
var parsedPattern = pattern.parse(patternStr), regExpMatcher = parseMatcher(matcherStr);
matchers.push(regExpMatcher);
patterns.push(parsedPattern);
// Stop after one iteration.
return false;
});
});
var getPattern = function (input) {
var matchedIndex;
utils.forEach(matchers, function (matcher, index) {
if (matcher.test(input)) {
matchedIndex = index;
return false;
}
});
return matchedIndex === undefined ? null : patterns[matchedIndex];
};
return {
getPattern: getPattern,
patterns: patterns,
matchers: matchers
};
}
// Expose
return patternMatcher;
}(pattern, utils);
/*
* inpt-sel.js
*
* Cross browser implementation to get and set input selections
*
*/
var inptSel = function () {
// Define module
var inptSel = {};
//
// Get begin and end positions of selected input. Return 0's
// if there is no selectiion data
//
inptSel.get = function (el) {
// If normal browser return with result
if (typeof el.selectionStart === 'number') {
return {
begin: el.selectionStart,
end: el.selectionEnd
};
}
// Uh-Oh. We must be IE. Fun with TextRange!!
var range = document.selection.createRange();
// Determine if there is a selection
if (range && range.parentElement() === el) {
var inputRange = el.createTextRange(), endRange = el.createTextRange(), length = el.value.length;
// Create a working TextRange for the input selection
inputRange.moveToBookmark(range.getBookmark());
// Move endRange begin pos to end pos (hence endRange)
endRange.collapse(false);
// If we are at the very end of the input, begin and end
// must both be the length of the el.value
if (inputRange.compareEndPoints('StartToEnd', endRange) > -1) {
return {
begin: length,
end: length
};
}
// Note: moveStart usually returns the units moved, which
// one may think is -length, however, it will stop when it
// gets to the begin of the range, thus giving us the
// negative value of the pos.
return {
begin: -inputRange.moveStart('character', -length),
end: -inputRange.moveEnd('character', -length)
};
}
//Return 0's on no selection data
return {
begin: 0,
end: 0
};
};
//
// Set the caret position at a specified location
//
inptSel.set = function (el, pos) {
// Normalize pos
if (typeof pos !== 'object') {
pos = {
begin: pos,
end: pos
};
}
// If normal browser
if (el.setSelectionRange) {
el.focus();
el.setSelectionRange(pos.begin, pos.end);
} else if (el.createTextRange) {
var range = el.createTextRange();
range.collapse(true);
range.moveEnd('character', pos.end);
range.moveStart('character', pos.begin);
range.select();
}
};
// Expose
return inptSel;
}();
/*
* formatter.js
*
* Class used to format input based on passed pattern
*
*/
var formatter = function (patternMatcher, inptSel, utils) {
// Defaults
var defaults = {
persistent: false,
repeat: false,
placeholder: ' '
};
// Regexs for input validation
var inptRegs = {
'9': /[0-9]/,
'a': /[A-Za-z]/,
'*': /[A-Za-z0-9]/
};
//
// Class Constructor - Called with new Formatter(el, opts)
// Responsible for setting up required instance variables, and
// attaching the event listener to the element.
//
function Formatter(el, opts) {
// Cache this
var self = this;
// Make sure we have an element. Make accesible to instance
self.el = el;
if (!self.el) {
throw new TypeError('Must provide an existing element');
}
// Merge opts with defaults
self.opts = utils.extend({}, defaults, opts);
// 1 pattern is special case
if (typeof self.opts.pattern !== 'undefined') {
self.opts.patterns = self._specFromSinglePattern(self.opts.pattern);
delete self.opts.pattern;
}
// Make sure we have valid opts
if (typeof self.opts.patterns === 'undefined') {
throw new TypeError('Must provide a pattern or array of patterns');
}
self.patternMatcher = patternMatcher(self.opts.patterns);
// Upate pattern with initial value
self._updatePattern();
// Init values
self.hldrs = {};
self.focus = 0;
// Add Listeners
utils.addListener(self.el, 'keydown', function (evt) {
self._keyDown(evt);
});
utils.addListener(self.el, 'keypress', function (evt) {
self._keyPress(evt);
});
utils.addListener(self.el, 'paste', function (evt) {
self._paste(evt);
});
// Persistence
if (self.opts.persistent) {
// Format on start
self._processKey('', false);
self.el.blur();
// Add Listeners
utils.addListener(self.el, 'focus', function (evt) {
self._focus(evt);
});
utils.addListener(self.el, 'click', function (evt) {
self._focus(evt);
});
utils.addListener(self.el, 'touchstart', function (evt) {
self._focus(evt);
});
}
}
//
// @public
// Add new char
//
Formatter.addInptType = function (chr, reg) {
inptRegs[chr] = reg;
};
//
// @public
// Apply the given pattern to the current input without moving caret.
//
Formatter.prototype.resetPattern = function (str) {
// Update opts to hold new pattern
this.opts.patterns = str ? this._specFromSinglePattern(str) : this.opts.patterns;
// Get current state
this.sel = inptSel.get(this.el);
this.val = this.el.value;
// Init values
this.delta = 0;
// Remove all formatted chars from val
this._removeChars();
this.patternMatcher = patternMatcher(this.opts.patterns);
// Update pattern
var newPattern = this.patternMatcher.getPattern(this.val);
this.mLength = newPattern.mLength;
this.chars = newPattern.chars;
this.inpts = newPattern.inpts;
// Format on start
this._processKey('', false, true);
};
//
// @private
// Determine correct format pattern based on input val
//
Formatter.prototype._updatePattern = function () {
// Determine appropriate pattern
var newPattern = this.patternMatcher.getPattern(this.val);
// Only update the pattern if there is an appropriate pattern for the value.
// Otherwise, leave the current pattern (and likely delete the latest character.)
if (newPattern) {
// Get info about the given pattern
this.mLength = newPattern.mLength;
this.chars = newPattern.chars;
this.inpts = newPattern.inpts;
}
};
//
// @private
// Handler called on all keyDown strokes. All keys trigger
// this handler. Only process delete keys.
//
Formatter.prototype._keyDown = function (evt) {
// The first thing we need is the character code
var k = evt.which || evt.keyCode;
// If delete key
if (k && utils.isDelKeyDown(evt.which, evt.keyCode)) {
// Process the keyCode and prevent default
this._processKey(null, k);
return utils.preventDefault(evt);
}
};
//
// @private
// Handler called on all keyPress strokes. Only processes
// character keys (as long as no modifier key is in use).
//
Formatter.prototype._keyPress = function (evt) {
// The first thing we need is the character code
var k, isSpecial;
// Mozilla will trigger on special keys and assign the the value 0
// We want to use that 0 rather than the keyCode it assigns.
k = evt.which || evt.keyCode;
isSpecial = utils.isSpecialKeyPress(evt.which, evt.keyCode);
// Process the keyCode and prevent default
if (!utils.isDelKeyPress(evt.which, evt.keyCode) && !isSpecial && !utils.isModifier(evt)) {
this._processKey(String.fromCharCode(k), false);
return utils.preventDefault(evt);
}
};
//
// @private
// Handler called on paste event.
//
Formatter.prototype._paste = function (evt) {
// Process the clipboard paste and prevent default
this._processKey(utils.getClip(evt), false);
return utils.preventDefault(evt);
};
//
// @private
// Handle called on focus event.
//
Formatter.prototype._focus = function () {
// Wrapped in timeout so that we can grab input selection
var self = this;
setTimeout(function () {
// Grab selection
var selection = inptSel.get(self.el);
// Char check
var isAfterStart = selection.end > self.focus, isFirstChar = selection.end === 0;
// If clicked in front of start, refocus to start
if (isAfterStart || isFirstChar) {
inptSel.set(self.el, self.focus);
}
}, 0);
};
//
// @private
// Using the provided key information, alter el value.
//
Formatter.prototype._processKey = function (chars, delKey, ignoreCaret) {
// Get current state
this.sel = inptSel.get(this.el);
this.val = this.el.value;
// Init values
this.delta = 0;
// If chars were highlighted, we need to remove them
if (this.sel.begin !== this.sel.end) {
this.delta = -1 * Math.abs(this.sel.begin - this.sel.end);
this.val = utils.removeChars(this.val, this.sel.begin, this.sel.end);
} else if (delKey && delKey === 46) {
this._delete();
} else if (delKey && this.sel.begin - 1 >= 0) {
// Always have a delta of at least -1 for the character being deleted.
this.val = utils.removeChars(this.val, this.sel.end - 1, this.sel.end);
this.delta -= 1;
} else if (delKey) {
return true;
}
// If the key is not a del key, it should convert to a str
if (!delKey) {
// Add char at position and increment delta
this.val = utils.addChars(this.val, chars, this.sel.begin);
this.delta += chars.length;
}
// Format el.value (also handles updating caret position)
this._formatValue(ignoreCaret);
};
//
// @private
// Deletes the character in front of it
//
Formatter.prototype._delete = function () {
// Adjust focus to make sure its not on a formatted char
while (this.chars[this.sel.begin]) {
this._nextPos();
}
// As long as we are not at the end
if (this.sel.begin < this.val.length) {
// We will simulate a delete by moving the caret to the next char
// and then deleting
this._nextPos();
this.val = utils.removeChars(this.val, this.sel.end - 1, this.sel.end);
this.delta = -1;
}
};
//
// @private
// Quick helper method to move the caret to the next pos
//
Formatter.prototype._nextPos = function () {
this.sel.end++;
this.sel.begin++;
};
//
// @private
// Alter element value to display characters matching the provided
// instance pattern. Also responsible for updating
//
Formatter.prototype._formatValue = function (ignoreCaret) {
// Set caret pos
this.newPos = this.sel.end + this.delta;
// Remove all formatted chars from val
this._removeChars();
// Switch to first matching pattern based on val
this._updatePattern();
// Validate inputs
this._validateInpts();
// Add formatted characters
this._addChars();
// Set value and adhere to maxLength
this.el.value = this.val.substr(0, this.mLength);
// Set new caret position
if (typeof ignoreCaret === 'undefined' || ignoreCaret === false) {
inptSel.set(this.el, this.newPos);
}
};
//
// @private
// Remove all formatted before and after a specified pos
//
Formatter.prototype._removeChars = function () {
// Delta shouldn't include placeholders
if (this.sel.end > this.focus) {
this.delta += this.sel.end - this.focus;
}
// Account for shifts during removal
var shift = 0;
// Loop through all possible char positions
for (var i = 0; i <= this.mLength; i++) {
// Get transformed position
var curChar = this.chars[i], curHldr = this.hldrs[i], pos = i + shift, val;
// If after selection we need to account for delta
pos = i >= this.sel.begin ? pos + this.delta : pos;
val = this.val.charAt(pos);
// Remove char and account for shift
if (curChar && curChar === val || curHldr && curHldr === val) {
this.val = utils.removeChars(this.val, pos, pos + 1);
shift--;
}
}
// All hldrs should be removed now
this.hldrs = {};
// Set focus to last character
this.focus = this.val.length;
};
//
// @private
// Make sure all inpts are valid, else remove and update delta
//
Formatter.prototype._validateInpts = function () {
// Loop over each char and validate
for (var i = 0; i < this.val.length; i++) {
// Get char inpt type
var inptType = this.inpts[i];
// Checks
var isBadType = !inptRegs[inptType], isInvalid = !isBadType && !inptRegs[inptType].test(this.val.charAt(i)), inBounds = this.inpts[i];
// Remove if incorrect and inbounds
if ((isBadType || isInvalid) && inBounds) {
this.val = utils.removeChars(this.val, i, i + 1);
this.focusStart--;
this.newPos--;
this.delta--;
i--;
}
}
};
//
// @private
// Loop over val and add formatted chars as necessary
//
Formatter.prototype._addChars = function () {
if (this.opts.persistent) {
// Loop over all possible characters
for (var i = 0; i <= this.mLength; i++) {
if (!this.val.charAt(i)) {
// Add placeholder at pos
this.val = utils.addChars(this.val, this.opts.placeholder, i);
this.hldrs[i] = this.opts.placeholder;
}
this._addChar(i);
}
// Adjust focus to make sure its not on a formatted char
while (this.chars[this.focus]) {
this.focus++;
}
} else {
// Avoid caching val.length, as they may change in _addChar.
for (var j = 0; j <= this.val.length; j++) {
// When moving backwards there are some race conditions where we
// dont want to add the character
if (this.delta <= 0 && j === this.focus) {
return true;
}
// Place character in current position of the formatted string.
this._addChar(j);
}
}
};
//
// @private
// Add formattted char at position
//
Formatter.prototype._addChar = function (i) {
// If char exists at position
var chr = this.chars[i];
if (!chr) {
return true;
}
// If chars are added in between the old pos and new pos
// we need to increment pos and delta
if (utils.isBetween(i, [
this.sel.begin - 1,
this.newPos + 1
])) {
this.newPos++;
this.delta++;
}
// If character added before focus, incr
if (i <= this.focus) {
this.focus++;
}
// Updateholder
if (this.hldrs[i]) {
delete this.hldrs[i];
this.hldrs[i + 1] = this.opts.placeholder;
}
// Update value
this.val = utils.addChars(this.val, chr, i);
};
//
// @private
// Create a patternSpec for passing into patternMatcher that
// has exactly one catch all pattern.
//
Formatter.prototype._specFromSinglePattern = function (patternStr) {
return [{ '*': patternStr }];
};
// Expose
return Formatter;
}(patternMatcher, inptSel, utils);
return formatter;
}));