| 提交 | 用户 | 时间 | ||
| 58d006 | 1 | /* |
| A | 2 | * jQuery Input Limiter plugin 1.3.1 |
| 3 | * http://rustyjeans.com/jquery-plugins/input-limiter/ | |
| 4 | * | |
| 5 | * Copyright (c) 2009 Russel Fones <russel@rustyjeans.com> | |
| 6 | * | |
| 7 | * Permission is hereby granted, free of charge, to any person | |
| 8 | * obtaining a copy of this software and associated documentation | |
| 9 | * files (the "Software"), to deal in the Software without | |
| 10 | * restriction, including without limitation the rights to use, | |
| 11 | * copy, modify, merge, publish, distribute, sublicense, and/or sell | |
| 12 | * copies of the Software, and to permit persons to whom the | |
| 13 | * Software is furnished to do so, subject to the following | |
| 14 | * conditions: | |
| 15 | * | |
| 16 | * The above copyright notice and this permission notice shall be | |
| 17 | * included in all copies or substantial portions of the Software. | |
| 18 | * | |
| 19 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
| 20 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES | |
| 21 | * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
| 22 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT | |
| 23 | * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, | |
| 24 | * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | |
| 25 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
| 26 | * OTHER DEALINGS IN THE SOFTWARE. | |
| 27 | */ | |
| 28 | ||
| 29 | (function ($) { | |
| 30 | $.fn.inputlimiter = function (options) { | |
| 31 | var opts = $.extend({}, $.fn.inputlimiter.defaults, options), | |
| 32 | $elements = $(this); | |
| 33 | if (opts.boxAttach && !$('#' + opts.boxId).length) { | |
| 34 | $('<div/>').appendTo("body").attr({id: opts.boxId, 'class': opts.boxClass}).css({'position': 'absolute'}).hide(); | |
| 35 | // apply bgiframe if available | |
| 36 | if ($.fn.bgiframe) { | |
| 37 | $('#' + opts.boxId).bgiframe(); | |
| 38 | } | |
| 39 | } | |
| 40 | ||
| 41 | var inputlimiterKeyup = function (e) { | |
| 42 | var $this = $(this), | |
| 43 | count = counter($this.val()); | |
| 44 | if (!opts.allowExceed && count > opts.limit) { | |
| 45 | $this.val(truncater($this.val())); | |
| 46 | } | |
| 47 | if (opts.boxAttach) { | |
| 48 | $('#' + opts.boxId).css({ | |
| 49 | 'width': $this.outerWidth() - ($('#' + opts.boxId).outerWidth() - $('#' + opts.boxId).width()) + 'px', | |
| 50 | 'left': $this.offset().left + 'px', | |
| 51 | 'top': ($this.offset().top + $this.outerHeight()) - 1 + 'px', | |
| 52 | 'z-index': 2000 | |
| 53 | }); | |
| 54 | } | |
| 55 | var charsRemaining = (opts.limit - count > 0 ? opts.limit - count : 0), | |
| 56 | remText = opts.remTextFilter(opts, charsRemaining), | |
| 57 | limitText = opts.limitTextFilter(opts); | |
| 58 | ||
| 59 | if (opts.limitTextShow) { | |
| 60 | $('#' + opts.boxId).html(remText + ' ' + limitText); | |
| 61 | // Check to see if the text is wrapping in the box | |
| 62 | // If it is lets break it between the remaining test and the limit test | |
| 63 | var textWidth = $("<span/>").appendTo("body").attr({id: '19cc9195583bfae1fad88e19d443be7a', 'class': opts.boxClass}).html(remText + ' ' + limitText).innerWidth(); | |
| 64 | $("#19cc9195583bfae1fad88e19d443be7a").remove(); | |
| 65 | if (textWidth > $('#' + opts.boxId).innerWidth()) { | |
| 66 | $('#' + opts.boxId).html(remText + '<br />' + limitText); | |
| 67 | } | |
| 68 | // Show the limiter box | |
| 69 | $('#' + opts.boxId).show(); | |
| 70 | } else { | |
| 71 | $('#' + opts.boxId).html(remText).show(); | |
| 72 | } | |
| 73 | }, | |
| 74 | ||
| 75 | inputlimiterKeypress = function (e) { | |
| 76 | var count = counter($(this).val()); | |
| 77 | if (!opts.allowExceed && count > opts.limit) { | |
| 78 | var modifierKeyPressed = e.ctrlKey || e.altKey || e.metaKey; | |
| 79 | if (!modifierKeyPressed && (e.which >= 32 && e.which <= 122) && this.selectionStart === this.selectionEnd) { | |
| 80 | return false; | |
| 81 | } | |
| 82 | } | |
| 83 | }, | |
| 84 | ||
| 85 | inputlimiterBlur = function () { | |
| 86 | var $this = $(this); | |
| 87 | count = counter($this.val()); | |
| 88 | if (!opts.allowExceed && count > opts.limit) { | |
| 89 | $this.val(truncater($this.val())); | |
| 90 | } | |
| 91 | if (opts.boxAttach) { | |
| 92 | $('#' + opts.boxId).fadeOut('fast'); | |
| 93 | } else if (opts.remTextHideOnBlur) { | |
| 94 | var limitText = opts.limitText; | |
| 95 | limitText = limitText.replace(/\%n/g, opts.limit); | |
| 96 | limitText = limitText.replace(/\%s/g, (opts.limit === 1 ? '' : 's')); | |
| 97 | $('#' + opts.boxId).html(limitText); | |
| 98 | } | |
| 99 | }, | |
| 100 | ||
| 101 | counter = function (value) { | |
| 102 | if (opts.limitBy.toLowerCase() === "words") { | |
| 103 | return (value.length > 0 ? $.trim(value).replace(/\ +(?= )/g, '').split(' ').length : 0); | |
| 104 | } | |
| 105 | var count = value.length, | |
| 106 | newlines = value.match(/\n/g); | |
| 107 | if (newlines && opts.lineReturnCount > 1) { | |
| 108 | count += newlines.length * (opts.lineReturnCount - 1); | |
| 109 | } | |
| 110 | return count; | |
| 111 | }, | |
| 112 | ||
| 113 | truncater = function (value) { | |
| 114 | if (opts.limitBy.toLowerCase() === "words") { | |
| 115 | return $.trim(value).replace(/\ +(?= )/g, '').split(' ').splice(0, opts.limit).join(' ') + ' '; | |
| 116 | } | |
| 117 | return value.substring(0, opts.limit); | |
| 118 | }; | |
| 119 | ||
| 120 | $(this).each(function (i) { | |
| 121 | var $this = $(this); | |
| 122 | if ((!options || !options.limit) && opts.useMaxlength && parseInt($this.attr('maxlength')) > 0 && parseInt($this.attr('maxlength')) != opts.limit) { | |
| 123 | $this.inputlimiter($.extend({}, opts, { limit: parseInt($this.attr('maxlength')) })); | |
| 124 | } else { | |
| 125 | if (!opts.allowExceed && opts.useMaxlength && opts.limitBy.toLowerCase() === "characters") { | |
| 126 | $this.attr('maxlength', opts.limit); | |
| 127 | } | |
| 128 | $this.unbind('.inputlimiter'); | |
| 129 | $this.bind('keyup.inputlimiter', inputlimiterKeyup); | |
| 130 | $this.bind('keypress.inputlimiter', inputlimiterKeypress); | |
| 131 | $this.bind('blur.inputlimiter', inputlimiterBlur); | |
| 132 | } | |
| 133 | }); | |
| 134 | }; | |
| 135 | ||
| 136 | $.fn.inputlimiter.remtextfilter = function (opts, charsRemaining) { | |
| 137 | var remText = opts.remText; | |
| 138 | if (charsRemaining === 0 && opts.remFullText !== null) { | |
| 139 | remText = opts.remFullText; | |
| 140 | } | |
| 141 | remText = remText.replace(/\%n/g, charsRemaining); | |
| 142 | remText = remText.replace(/\%s/g, (opts.zeroPlural ? (charsRemaining === 1 ? '' : 's') : (charsRemaining <= 1 ? '' : 's'))); | |
| 143 | return remText; | |
| 144 | }; | |
| 145 | ||
| 146 | $.fn.inputlimiter.limittextfilter = function (opts) { | |
| 147 | var limitText = opts.limitText; | |
| 148 | limitText = limitText.replace(/\%n/g, opts.limit); | |
| 149 | limitText = limitText.replace(/\%s/g, (opts.limit <= 1 ? '' : 's')); | |
| 150 | return limitText; | |
| 151 | }; | |
| 152 | ||
| 153 | $.fn.inputlimiter.defaults = { | |
| 154 | limit: 255, | |
| 155 | boxAttach: true, | |
| 156 | boxId: 'limiterBox', | |
| 157 | boxClass: 'limiterBox', | |
| 158 | remText: '%n character%s remaining.', | |
| 159 | remTextFilter: $.fn.inputlimiter.remtextfilter, | |
| 160 | remTextHideOnBlur: true, | |
| 161 | remFullText: null, | |
| 162 | limitTextShow: true, | |
| 163 | limitText: 'Field limited to %n character%s.', | |
| 164 | limitTextFilter: $.fn.inputlimiter.limittextfilter, | |
| 165 | zeroPlural: true, | |
| 166 | allowExceed: false, | |
| 167 | useMaxlength: true, | |
| 168 | limitBy: 'characters', | |
| 169 | lineReturnCount: 1 | |
| 170 | }; | |
| 171 | ||
| 172 | })(jQuery); | |
