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173 lines
6.2 KiB
173 lines
6.2 KiB
4 years ago
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/*
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* jQuery Input Limiter plugin 1.3.1
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* http://rustyjeans.com/jquery-plugins/input-limiter/
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*
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* Copyright (c) 2009 Russel Fones <russel@rustyjeans.com>
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use,
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* copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following
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* conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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(function ($) {
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$.fn.inputlimiter = function (options) {
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var opts = $.extend({}, $.fn.inputlimiter.defaults, options),
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$elements = $(this);
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if (opts.boxAttach && !$('#' + opts.boxId).length) {
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$('<div/>').appendTo("body").attr({id: opts.boxId, 'class': opts.boxClass}).css({'position': 'absolute'}).hide();
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// apply bgiframe if available
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if ($.fn.bgiframe) {
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$('#' + opts.boxId).bgiframe();
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}
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}
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var inputlimiterKeyup = function (e) {
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var $this = $(this),
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count = counter($this.val());
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if (!opts.allowExceed && count > opts.limit) {
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$this.val(truncater($this.val()));
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}
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if (opts.boxAttach) {
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$('#' + opts.boxId).css({
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'width': $this.outerWidth() - ($('#' + opts.boxId).outerWidth() - $('#' + opts.boxId).width()) + 'px',
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'left': $this.offset().left + 'px',
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'top': ($this.offset().top + $this.outerHeight()) - 1 + 'px',
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'z-index': 2000
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});
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}
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var charsRemaining = (opts.limit - count > 0 ? opts.limit - count : 0),
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remText = opts.remTextFilter(opts, charsRemaining),
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limitText = opts.limitTextFilter(opts);
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if (opts.limitTextShow) {
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$('#' + opts.boxId).html(remText + ' ' + limitText);
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// Check to see if the text is wrapping in the box
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// If it is lets break it between the remaining test and the limit test
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var textWidth = $("<span/>").appendTo("body").attr({id: '19cc9195583bfae1fad88e19d443be7a', 'class': opts.boxClass}).html(remText + ' ' + limitText).innerWidth();
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$("#19cc9195583bfae1fad88e19d443be7a").remove();
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if (textWidth > $('#' + opts.boxId).innerWidth()) {
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$('#' + opts.boxId).html(remText + '<br />' + limitText);
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}
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// Show the limiter box
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$('#' + opts.boxId).show();
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} else {
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$('#' + opts.boxId).html(remText).show();
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}
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},
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inputlimiterKeypress = function (e) {
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var count = counter($(this).val());
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if (!opts.allowExceed && count > opts.limit) {
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var modifierKeyPressed = e.ctrlKey || e.altKey || e.metaKey;
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if (!modifierKeyPressed && (e.which >= 32 && e.which <= 122) && this.selectionStart === this.selectionEnd) {
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return false;
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}
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}
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},
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inputlimiterBlur = function () {
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var $this = $(this);
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count = counter($this.val());
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if (!opts.allowExceed && count > opts.limit) {
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$this.val(truncater($this.val()));
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}
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if (opts.boxAttach) {
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$('#' + opts.boxId).fadeOut('fast');
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} else if (opts.remTextHideOnBlur) {
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var limitText = opts.limitText;
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limitText = limitText.replace(/\%n/g, opts.limit);
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limitText = limitText.replace(/\%s/g, (opts.limit === 1 ? '' : 's'));
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$('#' + opts.boxId).html(limitText);
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}
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},
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counter = function (value) {
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if (opts.limitBy.toLowerCase() === "words") {
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return (value.length > 0 ? $.trim(value).replace(/\ +(?= )/g, '').split(' ').length : 0);
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}
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var count = value.length,
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newlines = value.match(/\n/g);
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if (newlines && opts.lineReturnCount > 1) {
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count += newlines.length * (opts.lineReturnCount - 1);
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}
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return count;
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},
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truncater = function (value) {
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if (opts.limitBy.toLowerCase() === "words") {
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return $.trim(value).replace(/\ +(?= )/g, '').split(' ').splice(0, opts.limit).join(' ') + ' ';
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}
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return value.substring(0, opts.limit);
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};
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$(this).each(function (i) {
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var $this = $(this);
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if ((!options || !options.limit) && opts.useMaxlength && parseInt($this.attr('maxlength')) > 0 && parseInt($this.attr('maxlength')) != opts.limit) {
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$this.inputlimiter($.extend({}, opts, { limit: parseInt($this.attr('maxlength')) }));
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} else {
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if (!opts.allowExceed && opts.useMaxlength && opts.limitBy.toLowerCase() === "characters") {
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$this.attr('maxlength', opts.limit);
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}
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$this.unbind('.inputlimiter');
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$this.bind('keyup.inputlimiter', inputlimiterKeyup);
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$this.bind('keypress.inputlimiter', inputlimiterKeypress);
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$this.bind('blur.inputlimiter', inputlimiterBlur);
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}
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});
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};
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$.fn.inputlimiter.remtextfilter = function (opts, charsRemaining) {
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var remText = opts.remText;
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if (charsRemaining === 0 && opts.remFullText !== null) {
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remText = opts.remFullText;
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}
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remText = remText.replace(/\%n/g, charsRemaining);
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remText = remText.replace(/\%s/g, (opts.zeroPlural ? (charsRemaining === 1 ? '' : 's') : (charsRemaining <= 1 ? '' : 's')));
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return remText;
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};
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$.fn.inputlimiter.limittextfilter = function (opts) {
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var limitText = opts.limitText;
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limitText = limitText.replace(/\%n/g, opts.limit);
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limitText = limitText.replace(/\%s/g, (opts.limit <= 1 ? '' : 's'));
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return limitText;
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};
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$.fn.inputlimiter.defaults = {
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limit: 255,
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boxAttach: true,
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boxId: 'limiterBox',
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boxClass: 'limiterBox',
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remText: '%n character%s remaining.',
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remTextFilter: $.fn.inputlimiter.remtextfilter,
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remTextHideOnBlur: true,
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remFullText: null,
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limitTextShow: true,
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limitText: 'Field limited to %n character%s.',
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limitTextFilter: $.fn.inputlimiter.limittextfilter,
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zeroPlural: true,
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allowExceed: false,
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useMaxlength: true,
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limitBy: 'characters',
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lineReturnCount: 1
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};
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})(jQuery);
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