AutorÃa | Ultima modificación | Ver Log |
(function($) {
"use strict";
if (!$.event.special.destroyed) {
$.event.special.destroyed = {
remove: function(o) {
if (o.handler) {
o.handler();
}
}
};
}
$.fn.extend({
maxlength: function(options, callback) {
var documentBody = $("body"), defaults = {
showOnReady: false,
alwaysShow: true,
threshold: 0,
warningClass: "small form-text text-muted",
limitReachedClass: "small form-text text-danger",
limitExceededClass: "",
separator: " / ",
preText: "",
postText: "",
showMaxLength: true,
placement: "bottom-right-inside",
message: null,
showCharsTyped: true,
validate: false,
utf8: false,
appendToParent: false,
twoCharLinebreak: true,
customMaxAttribute: null,
customMaxClass: "overmax",
allowOverMax: false,
zIndex: 1099
};
if ($.isFunction(options) && !callback) {
callback = options;
options = {};
}
options = $.extend(defaults, options);
function utf8CharByteCount(character) {
var c = character.charCodeAt();
return !c ? 0 : c < 128 ? 1 : c < 2048 ? 2 : 3;
}
function utf8Length(string) {
return string.split("").map(utf8CharByteCount).concat(0).reduce((function(sum, val) {
return sum + val;
}));
}
function inputLength(input) {
var text = input.val();
if (options.twoCharLinebreak) {
text = text.replace(/\r(?!\n)|\n(?!\r)/g, "\r\n");
} else {
text = text.replace(/(?:\r\n|\r|\n)/g, "\n");
}
var currentLength = 0;
if (options.utf8) {
currentLength = utf8Length(text);
} else {
currentLength = text.length;
}
if (input.prop("type") === "file" && input.val() !== "") {
currentLength -= 12;
}
return currentLength;
}
function truncateChars(input, maxlength) {
var text = input.val();
if (options.twoCharLinebreak) {
text = text.replace(/\r(?!\n)|\n(?!\r)/g, "\r\n");
if (text[text.length - 1] === "\n") {
maxlength -= text.length % 2;
}
}
if (options.utf8) {
var indexedSize = text.split("").map(utf8CharByteCount);
for (var removedBytes = 0, bytesPastMax = utf8Length(text) - maxlength; removedBytes < bytesPastMax; removedBytes += indexedSize.pop()) ;
maxlength -= maxlength - indexedSize.length;
}
input.val(text.substr(0, maxlength));
}
function charsLeftThreshold(input, threshold, maxlength) {
var output = true;
if (!options.alwaysShow && maxlength - inputLength(input) > threshold) {
output = false;
}
return output;
}
function remainingChars(input, maxlength) {
var length = maxlength - inputLength(input);
return length;
}
function showRemaining(currentInput, indicator) {
indicator.css({
display: "block"
});
currentInput.trigger("maxlength.shown");
}
function hideRemaining(currentInput, indicator) {
if (options.alwaysShow) {
return;
}
indicator.css({
display: "none"
});
currentInput.trigger("maxlength.hidden");
}
function updateMaxLengthHTML(currentInputText, maxLengthThisInput, typedChars) {
var output = "";
if (options.message) {
if (typeof options.message === "function") {
output = options.message(currentInputText, maxLengthThisInput);
} else {
output = options.message.replace("%charsTyped%", typedChars).replace("%charsRemaining%", maxLengthThisInput - typedChars).replace("%charsTotal%", maxLengthThisInput);
}
} else {
if (options.preText) {
output += options.preText;
}
if (!options.showCharsTyped) {
output += maxLengthThisInput - typedChars;
} else {
output += typedChars;
}
if (options.showMaxLength) {
output += options.separator + maxLengthThisInput;
}
if (options.postText) {
output += options.postText;
}
}
return output;
}
function manageRemainingVisibility(remaining, currentInput, maxLengthCurrentInput, maxLengthIndicator) {
if (maxLengthIndicator) {
maxLengthIndicator.html(updateMaxLengthHTML(currentInput.val(), maxLengthCurrentInput, maxLengthCurrentInput - remaining));
if (remaining > 0) {
if (charsLeftThreshold(currentInput, options.threshold, maxLengthCurrentInput)) {
showRemaining(currentInput, maxLengthIndicator.removeClass(options.limitReachedClass + " " + options.limitExceededClass).addClass(options.warningClass));
} else {
hideRemaining(currentInput, maxLengthIndicator);
}
} else {
if (!options.limitExceededClass) {
showRemaining(currentInput, maxLengthIndicator.removeClass(options.warningClass).addClass(options.limitReachedClass));
} else {
if (remaining === 0) {
showRemaining(currentInput, maxLengthIndicator.removeClass(options.warningClass + " " + options.limitExceededClass).addClass(options.limitReachedClass));
} else {
showRemaining(currentInput, maxLengthIndicator.removeClass(options.warningClass + " " + options.limitReachedClass).addClass(options.limitExceededClass));
}
}
}
}
if (options.customMaxAttribute) {
if (remaining < 0) {
currentInput.addClass(options.customMaxClass);
} else {
currentInput.removeClass(options.customMaxClass);
}
}
}
function getPosition(currentInput) {
var el = currentInput[0];
return $.extend({}, typeof el.getBoundingClientRect === "function" ? el.getBoundingClientRect() : {
width: el.offsetWidth,
height: el.offsetHeight
}, currentInput.offset());
}
function placeWithCSS(placement, maxLengthIndicator) {
if (!placement || !maxLengthIndicator) {
return;
}
var POSITION_KEYS = [ "top", "bottom", "left", "right", "position" ];
var cssPos = {};
$.each(POSITION_KEYS, (function(i, key) {
var val = options.placement[key];
if (typeof val !== "undefined") {
cssPos[key] = val;
}
}));
maxLengthIndicator.css(cssPos);
return;
}
function place(currentInput, maxLengthIndicator) {
var pos = getPosition(currentInput);
if ($.type(options.placement) === "function") {
options.placement(currentInput, maxLengthIndicator, pos);
return;
}
if ($.isPlainObject(options.placement)) {
placeWithCSS(options.placement, maxLengthIndicator);
return;
}
var inputOuter = currentInput.outerWidth(), outerWidth = maxLengthIndicator.outerWidth(), actualWidth = maxLengthIndicator.width(), actualHeight = maxLengthIndicator.height();
if (options.appendToParent) {
pos.top -= currentInput.parent().offset().top;
pos.left -= currentInput.parent().offset().left;
}
switch (options.placement) {
case "bottom":
maxLengthIndicator.css({
top: pos.top + pos.height,
left: pos.left + pos.width / 2 - actualWidth / 2
});
break;
case "top":
maxLengthIndicator.css({
top: pos.top - actualHeight,
left: pos.left + pos.width / 2 - actualWidth / 2
});
break;
case "left":
maxLengthIndicator.css({
top: pos.top + pos.height / 2 - actualHeight / 2,
left: pos.left - actualWidth
});
break;
case "right":
maxLengthIndicator.css({
top: pos.top + pos.height / 2 - actualHeight / 2,
left: pos.left + pos.width
});
break;
case "bottom-right":
maxLengthIndicator.css({
top: pos.top + pos.height,
left: pos.left + pos.width
});
break;
case "top-right":
maxLengthIndicator.css({
top: pos.top - actualHeight,
left: pos.left + inputOuter
});
break;
case "top-left":
maxLengthIndicator.css({
top: pos.top - actualHeight,
left: pos.left - outerWidth
});
break;
case "bottom-left":
maxLengthIndicator.css({
top: pos.top + currentInput.outerHeight(),
left: pos.left - outerWidth
});
break;
case "centered-right":
maxLengthIndicator.css({
top: pos.top + actualHeight / 2,
left: pos.left + inputOuter - outerWidth - 3
});
break;
case "bottom-right-inside":
maxLengthIndicator.css({
top: pos.top + pos.height,
left: pos.left + pos.width - outerWidth
});
break;
case "top-right-inside":
maxLengthIndicator.css({
top: pos.top - actualHeight,
left: pos.left + inputOuter - outerWidth
});
break;
case "top-left-inside":
maxLengthIndicator.css({
top: pos.top - actualHeight,
left: pos.left
});
break;
case "bottom-left-inside":
maxLengthIndicator.css({
top: pos.top + currentInput.outerHeight(),
left: pos.left
});
break;
}
}
function isPlacementMutable() {
return options.placement === "bottom-right-inside" || options.placement === "top-right-inside" || typeof options.placement === "function" || options.message && typeof options.message === "function";
}
function getMaxLength(currentInput) {
var max = currentInput.attr("maxlength") || options.customMaxAttribute;
if (options.customMaxAttribute && !options.allowOverMax) {
var custom = currentInput.attr(options.customMaxAttribute);
if (!max || custom < max) {
max = custom;
}
}
if (!max) {
max = currentInput.attr("size");
}
return max;
}
return this.each((function() {
var currentInput = $(this), maxLengthCurrentInput, maxLengthIndicator;
$(window).resize((function() {
if (maxLengthIndicator) {
place(currentInput, maxLengthIndicator);
}
}));
function firstInit() {
var maxlengthContent = updateMaxLengthHTML(currentInput.val(), maxLengthCurrentInput, "0");
maxLengthCurrentInput = getMaxLength(currentInput);
if (!maxLengthIndicator) {
maxLengthIndicator = $('<span class="bootstrap-maxlength"></span>').css({
display: "none",
position: "absolute",
whiteSpace: "nowrap",
zIndex: options.zIndex
}).html(maxlengthContent);
}
if (currentInput.is("textarea")) {
currentInput.data("maxlenghtsizex", currentInput.outerWidth());
currentInput.data("maxlenghtsizey", currentInput.outerHeight());
currentInput.mouseup((function() {
if (currentInput.outerWidth() !== currentInput.data("maxlenghtsizex") || currentInput.outerHeight() !== currentInput.data("maxlenghtsizey")) {
place(currentInput, maxLengthIndicator);
}
currentInput.data("maxlenghtsizex", currentInput.outerWidth());
currentInput.data("maxlenghtsizey", currentInput.outerHeight());
}));
}
if (options.appendToParent) {
currentInput.parent().append(maxLengthIndicator);
currentInput.parent().css("position", "relative");
} else {
documentBody.append(maxLengthIndicator);
}
var remaining = remainingChars(currentInput, getMaxLength(currentInput));
manageRemainingVisibility(remaining, currentInput, maxLengthCurrentInput, maxLengthIndicator);
place(currentInput, maxLengthIndicator);
}
if (options.showOnReady) {
currentInput.ready((function() {
firstInit();
}));
} else {
currentInput.focus((function() {
firstInit();
}));
}
currentInput.on("maxlength.reposition", (function() {
place(currentInput, maxLengthIndicator);
}));
currentInput.on("destroyed", (function() {
if (maxLengthIndicator) {
maxLengthIndicator.remove();
}
}));
currentInput.on("blur", (function() {
if (maxLengthIndicator && !options.showOnReady) {
maxLengthIndicator.remove();
}
}));
currentInput.on("input", (function() {
var maxlength = getMaxLength(currentInput), remaining = remainingChars(currentInput, maxlength), output = true;
if (options.validate && remaining < 0) {
truncateChars(currentInput, maxlength);
output = false;
} else {
manageRemainingVisibility(remaining, currentInput, maxLengthCurrentInput, maxLengthIndicator);
}
return output;
}));
}));
}
});
})(jQuery);