autocomplete实现联想输入，自动补全

jQuery.AutoComplete是一个基于jQuery的自动补全插件。借助于jQuery优秀的跨浏览器特性，可以兼容Chrome/IE/Firefox/Opera/Safari等多种浏览器。

特性一览：

• 支持补全列表的宽度设定。
• 支持补全列表的最大高度设定。
• 支持补全列表的行数限制。
• 支持补全列表的显示位置及方向的设定。
• 支持自定义匹配规则。
• 支持匹配文本的渲染。
• 支持自定义匹配文本的渲染样式。
• 支持补全列表的样式设定。
• 支持自定义补全列表项的创建。
• 支持多种数据源。
• 支持'json'和'xml'两种数据格式。
• 支持异步处理。
• 支持错误调试。
• 支持jQuery1.7.1+。

先看效果图：

上图是通过ajax请求服务器返回的数据。下面简单介绍如何使用。

一、如何使用：

   引入jquery.autocomplete.js和jquery.autocomplete.css文件到你的页面中。

二、参数说明：

autocomplete的参数比较丰富。这里我不全部进行介绍。大家自行去看api文档。

$("#tt").AutoComplete({
    'data': ['One', 'Two', 'Three', 'Four', 'Five', 'Six', 'Seven', 'Eight', 'Nine', 'Ten',     'Eleven', 'Twelve']
});

　　data可以是数组，也可以是url，但url返回的数据必须是数组。

三、示例：

  1、本地数据：

html代码：

<input type="text" id="tt" value="" class="text" />

javascript代码：

$(function(){

    $("#tt").AutoComplete({
        'data':['Cambodia', 'Cameroon', 'Canada', 'Cape-Verde', 'Cayman-Islands', 'Central-African-Republic', 'Chad', 'Chile', 'China', 'Colombia', 'Commonwealth', 'Comoros', 'Costa-Rica', "Cote-d'Ivoire", 'Croatia', 'Cuba', 'Cyprus', 'Czech-Republic'],
    });

})

注意data是有引号的。

2、ajax请求：

html代码：

<input type="text" id="company" value="" class="text" />

javascript代码：

$(function(){
    $("#tt").AutoComplete({
        'data':'http://localhost/test/suggestCom',
    });
})

服务端返回数据格式：

["\u5317\u4eac\u73b0\u4ee3","\u5317\u4eac\u57ce\u5efa\u96c6\u56e2\u6709\u9650\u8d23\u4efb\u516c\u53f8","\u5317\u4eac\u5efa\u5de5\u96c6\u56e2\u6709\u9650\u8d23\u4efb\u516c\u53f8","\u5317\u4eac\u9996\u90fd\u65c5\u6e38\u96c6\u56e2\u6709\u9650\u8d23\u4efb\u516c\u53f8","\u5317\u4eac\u533b\u836f\u96c6\u56e2\u6709\u9650\u8d23\u4efb\u516c\u53f8","\u5317\u4eac\u4e00\u8f7b\u63a7\u80a1\u6709\u9650\u8d23\u4efb\u516c\u53f8","\u5317\u4eac\u91d1\u9685\u96c6\u56e2\u6709\u9650\u8d23\u4efb\u516c\u53f8","\u5317\u4eac\u71d5\u4eac\u5564\u9152\u96c6\u56e2\u516c\u53f8","\u5317\u4eac\u5e02\u71c3\u6c14\u96c6\u56e2\u6709\u9650\u8d23\u4efb\u516c\u53f8","\u5317\u4eac\u4f4f\u603b\u96c6\u56e2\u6709\u9650\u8d23\u4efb\u516c\u53f8"]

服务端的代码：（以ThinkPHP示例）

public function suggestCom(){
        $wd = $_GET['keyword'];
        $keywords = $wd;

        $company_model = M('Company');

        $res = $company_model->where("name like '%".$keywords."%' or abbr like '%".$keywords."%' ")->limit(10)->select();
        foreach($res as $v){
            $suggestions[]= $v['name'];
        }

        echo json_encode($suggestions);
    }

注意默认是GET过来的数据，名称是keyword，返回数据是和本地data一致的。

附上jquery.autocomplete.js和jquery.autocomplete.css文件代码：

jquery.autocomplete.js

/*
* jQuery.autocomplete.js (v1.1.2)
* authored by nswish ([e-mail])
* jQuery 1.7.1+ support
* compatible: ie/chrome/firefox/opera/safari
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
(function($){
    $.fn.extend({
        'AutoComplete': function(option){
            return this.each(function(){
                if (!(this && this.tagName === 'INPUT' && this.type === 'text')) return;

                if(this.controller)
                    this.controller.setOption(option);
                else {
                    if($.isPlainObject(option))
                        this.controller = new Controller(this, option);
                }
            });
        }
    });

    // ------- Construct Method Here -------------
    var Controller = function(input, option){
        this.option = $.extend(false, {
            // style
            'width': 320,                                   // number, string 'auto'
            'maxHeight': null,                              // number
            'itemHeight': null,                             // number
            'listStyle': 'normal',                          // string 'normal', 'iconList', 'custom'
            'listDirection': 'down',                        // string 'down' or 'up'
            // data
            'data': [],                                     // array, string, function
            'ajaxDataType': 'json',                         // string 'json' or 'xml'
            'ajaxParams': {},                               // function, string, object
            'ajaxTimeout': 3000,                            // number
            'ajaxType': 'GET',                              // string 'GET' or 'POST'
            'maxItems': 20,                                 // number
            // event
            'matchHandler': defaultMatchHandler,            // function
            'emphasisHandler': defaultEmphasisHandler,      // function
            'createItemHandler': null,                      // function
            'beforeLoadDataHandler': null,                  // function
            'afterSelectedHandler': null,                   // function
            // behavior
            'async': false,                                 // bool
            'emphasis': true,                               // bool
            // debug
            'onerror': null                                 // function
        }, option);    

        _setupInputView.apply(this, [input]);
        _setupSearchView.apply(this);
    };

    // ------- Private Method Here -------------
    var _setupInputView = function(input){
        var that = this;

        this.inputView = $(input);

        this.inputView
        .attr('autocomplete', 'off') // disable IE's autocomplete feature
        .keyup(this._keyup = function(event){
            switch(event.keyCode){
                case 13: // enter
                case 16: // shift
                case 17: // ctrl
                case 37: // left
                case 38: // up
                case 39: // right
                case 40: // down
                    break;
                case 27: // esc
                    _emptySearchView.apply(that);
                    break;
                default:
                    if(that.option.async){
                        setTimeout(function(){
                            _search.apply(that);
                        }, 0);
                    } else {
                        _search.apply(that);
                    }
            }
        })
        .keydown(this._keydown = function(event){
            switch(event.keyCode){
                case 38: // up
                    _move.apply(that, ['up']);
                    break;
                case 40: // down
                    _move.apply(that, ['down']);
                    break;
                case 13: // enter
                    var isSearchViewVisible = that.searchView.is(':visible');
                    _select.apply(that);
                    if(isSearchViewVisible)
                        return false;
                    break;
            }
        })
        .blur(this._blur = function(){
            $(document).one('click', function(){
                _emptySearchView.apply(that);
            });
        });
    };

    var _setupSearchView = function(){
        var that = this;

        this.searchView = $("<div class='ac'><ul></ul></div>")
        .appendTo(document.body)
        .on('mouseenter', 'li', function(){
            that.searchView.find("li.selected").removeClass("selected");
            $(this).addClass('selected');
        })
        .on('mouseleave', 'li', function(){
            $(this).removeClass('selected');
        })
        .on('click', 'li', function(){
            _select.apply(that);
            _emptySearchView.apply(that);
        })
        .css('font-size', this.inputView.css('font-size'));

        $(window).resize(function(){
            _locateSearchView.apply(that);
        });
    };

    var _createItems = function(result){
        var that = this,
            container = this.searchView.find('ul').empty();

        if ($.inArray(this.option.listStyle, ['normal', 'iconList', 'custom']) == -1) {
            throw ['遇到未知的listStyle参数！'];
        };

        $.each(result, function(index, data){
            var item = $("<li><div></div></li>").appendTo(container).addClass(that.option.listStyle).data("data", data).find("div");

            switch(that.option.listStyle){
                case 'normal':
                    item.append("<span>"+data.label+"</span>");
                    break;
                case 'iconList':
                    var img = $("<img></img>").attr('src', data.image);
                    item.append($("<div></div>").append(img)).append("<span>"+data.label+"</span>");
                    break;
                case 'custom':
                    item.append(that.option.createItemHandler.apply(that, [index, data]));
                case 'default':
                    break;
            }

            if(that.option.itemHeight > 0){
                item.height(that.option.itemHeight).css('max-height', that.option.itemHeight);
            }
        });
    };

    var _locateSearchView = function(){
        if(this.option.listDirection === 'down'){
            var top = this.inputView.offset().top + this.inputView.outerHeight();
        } else if(this.option.listDirection === 'up'){
            var top = this.inputView.offset().top - this.searchView.outerHeight();
        } else {
            throw '遇到未知的listDirection参数！';
        }

        var left = this.inputView.offset().left;
        this.searchView.css("top", top+"px").css("left", left+"px");
    };

    var _calcWidth = function(){
        if(typeof(this.option.width) === 'string' && this.option.width.toLowerCase() === 'auto'){
            return this.inputView.outerWidth() - 2;
        } else if(typeof(this.option.width) === 'number'){
            return this.option.width;
        } else {
            throw '遇到未知的width参数！';
        }
    }

    var _showSearchView = function(result){
        var that = this;

        if(this.option.listDirection === 'up')
            result = result.reverse();

        try{
            _createItems.apply(that, [result]);//console.log("length="+this.searchView.find('li').size());

            if(this.option.maxHeight > 0){
                this.searchView.css('max-height', this.option.maxHeight+"px");
                if($.browser.msie){
                    this.searchView.css("height", this.searchView.height() > this.option.maxHeight ? this.option.maxHeight+"px" : "auto");
                }
            }

            // 定位补全列表
            _locateSearchView.apply(this);

            // 计算并设定补全列表的宽度
            this.searchView.css("width", _calcWidth.apply(this)+'px');

        } catch(ex) {
            _error.apply(this, [ex+'']);
            return;
        }

        this.searchView.show();

        _move.apply(this, [this.option.listDirection]);
    };

    var _emptySearchView = function(){
        this.searchView.find('ul').empty();
        this.searchView.hide();
    };

    var _move = function(dir){
        var selected = this.searchView.find('li.selected');

        if (selected.size())
            var nextSelected = dir === 'up' ? selected.prev() : selected.next();
        else
            var nextSelected = dir === 'up' ? this.searchView.find('li').last() : this.searchView.find('li').first();

        if(nextSelected.size()){
            this.searchView.find('li').removeClass('selected');
            nextSelected.addClass("selected");

            var itemHeight = nextSelected.outerHeight();
            var itemTop = nextSelected.position().top;
            if(itemHeight + itemTop > this.searchView.height())
                this.searchView.scrollTop(this.searchView.scrollTop() + itemTop + itemHeight - this.searchView.height());
            else if(itemTop < 0)
                this.searchView.scrollTop(this.searchView.scrollTop() + itemTop);
        }
    };

    var _select = function(){
        var that = this,
            selected = this.searchView.find('li.selected');

        if (selected.size()) {
            var data = selected.data('data');

            this.inputView.val(data.value);

            if ($.isFunction(this.option.afterSelectedHandler)) {
                try{
                    this.option.afterSelectedHandler.apply(that, [data]);
                } catch(e) {
                    _error.apply(this, ['调用afterSelectedHandler错误:'+e]);
                    return;
                }
            }

            _emptySearchView.apply(this);
        }
    };

    var _ajaxSend = function(keyword){
        jQuery.support.cors = true;
        var that = this,
            data = [],
            ajaxOption = {
                'async': false,
                'dataType': that.option.ajaxDataType,
                'type': that.option.ajaxType,
                'timeout': this.option.ajaxTimeout,
                'success': function(theData, textStatus, jqXHR){
                    if (that.option.ajaxDataType === 'xml') {
                        $(theData).find('item').each(function(){
                            var item = {
                                'value': $(this).text(),
                                'label': $(this).text()
                            };

                            for (var i=0; i<this.attributes.length; i++) {
                                var key = this.attributes[i].nodeName,
                                    value = this.attributes[i].nodeValue;

                                item[key] = value;
                            };

                            data.push(item);
                        });
                    } else if(that.option.ajaxDataType === 'json') {
                        data = theData;
                    } else {
                        throw '遇到未知的ajaxDataType参数！';
                    }
                },
                'error': function(jqXHR, textStatus, errorThrown){
                    throw errorThrown;
                }
            };

        if ($.isPlainObject(this.option.ajaxParams)) {
            ajaxOption['data'] = $.extend(false, {'keyword': keyword}, this.option.ajaxParams);
        } else if ($.isFunction(this.option.ajaxParams)) {
            ajaxOption['data'] = $.extend(false, {'keyword': keyword}, this.option.ajaxParams.apply(this, [keyword]));
        } else if (typeof(this.option.ajaxParams) === 'string') {
            ajaxOption['data'] = "keyword=" + keyword + "&" + this.option.ajaxParams;
        } else {
            throw '遇到未知的ajaxParams参数！';
        }

        $.ajax(this.option.data, ajaxOption);

        return data;
    };

    var _search = function(){
        var that = this,
            keyword = this.inputView.val(),
            data = [],
            loadDataFlag = true,
            result = [];

        if($.trim(keyword).length == 0){
            _emptySearchView.apply(that);
            return;
        }

        // invoke beforeLoadDataHandler if exists
        if ($.isFunction(this.option.beforeLoadDataHandler)) {
            try{
                loadDataFlag = this.option.beforeLoadDataHandler.apply(this, [keyword]);
            } catch(e) {
                _error.apply(this, ['调用beforeLoadDataHandler错误:'+e]);
                return;
            }
        }

        if (loadDataFlag){
            if ($.isArray(this.option.data)) {
                data = this.option.data;
            } else if ($.isFunction(this.option.data)) {
                try{
                    data = this.option.data.apply(this, [keyword]);
                } catch(e) {
                    _error.apply(this, ['调用data错误:'+e]);
                    return;
                }
            } else if (typeof(this.option.data) === 'string') {
                try{
                    data = _ajaxSend.apply(this, [keyword]);
                } catch(e) {
                    _error.apply(this, ['Ajax错误:'+e]);
                    return;
                }
            } else {
                _error.apply(this, ['遇到未知的data参数！']);
                return;
            }
        }

        $.each(data, function(index, value){
            if(that.option.maxItems > 0 && result.length >= that.option.maxItems)
                return false;

            if($.isPlainObject(value)){
                var item = $.extend(false, {}, value);
            } else if(typeof(value) === 'string') {
                var item = {'label': value, 'value': value, 'image': value};
            } else {
                _error.apply(that, ['数据源Item类型错误！']);
                return false;
            }

            if(that.option.matchHandler.apply(that, [keyword, item])){
                result.push(item);
            }
        });

        if(keyword == this.inputView.val()){
            if(result.length > 0)
                _showSearchView.apply(this, [result]);
            else
                _emptySearchView.apply(this);
        }
    };

    var _error = function(msg){
        if($.isFunction(this.option.onerror)){
            this.option.onerror.apply(this, [msg]);
        }
    };

    // ------- Public Method Here -------------
    Controller.prototype.setOption = function(option){
        if ($.isPlainObject(option)) {
            this.option = $.extend(false, this.option, option);
        } else if(typeof(option) === 'string'){
            switch(option){
                case 'destroy':
                    this.destroy();
                    break;
                case 'show':
                    this.show();
                    break;
                default:
                    _error.apply(this, ['未知的AutoComplete参数！']);
                    return;
            }
        } else {
            _error.apply(this, ['未知的AutoComplete参数类型！']);
            return;
        }
    };

    Controller.prototype.destroy = function(){
        this.searchView.remove();
        this.inputView.unbind('keyup', this._keyup).unbind('keydown', this._keydown).unbind('blur', this._blur);
        delete this.inputView.get(0).controller;
    };

    Controller.prototype.show = function(){
        if(this.option.async){
            setTimeout(function(){
                _search.apply(this);
            }, 0);
        } else {
            _search.apply(this);
        }
    };

    // ------- Default Handler Function Here -------------
    var defaultMatchHandler = function(keyword, data){
        var regex = RegExp(keyword.replace(/([.?*+^$[\]\\(){}|-])/g, "\\$1"), 'i');
        if(this.option.emphasis && $.isFunction(this.option.emphasisHandler))
            this.option.emphasisHandler.apply(this, [keyword, data]);
        return regex.test(data.value);
    };

    var defaultEmphasisHandler = function(keyword, data){
        var regex = RegExp("("+keyword.replace(/([.?*+^$[\]\\(){}|-])/g, "\\$1")+")", 'ig');
        data.label = data.label.replace(regex, "<em>$1</em>");
    };

})(jQuery);

jquery.autocomplete.css

/*
* jQuery.autocomplete.css (v1.1.0)
* authored by nswish ([e-mail])
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
div.ac {
    border-style: solid;
    border-width: 1px;
    border-color: gray;
    position: absolute;
    display: none;
    overflow: auto;
}

div.ac > ul {
    margin: 0px;
    padding: 0px;
}

div.ac > ul > li {
    margin: 0px;
    list-style-type: none;
    background-color: white;
    word-break: break-all;
    font-family: helvetica, arial, "Courier New", sans-serif;
}

div.ac > ul > li > div {
    display: table-row;
    width: 100%;
}

div.ac > ul > li > div em {
    background-color: #B0E2FF;
    font-style: normal;
}

div.ac > ul > li.normal {
    padding: 2px 0px 2px 2px;
}

div.ac > ul > li.normal > div > span{
    display: table-cell;
    vertical-align: middle;
}

div.ac > ul > li.iconList {
    padding: 0px 0px 0px 2px;
}

div.ac > ul > li.iconList > div > div {
    display: table-cell;
    vertical-align: middle;
    padding-right: 5px;
}

div.ac > ul > li.iconList > div > div > img {
    display: table;
    display: table-cell\9;
}   

div.ac > ul > li.iconList > div > span {
    display: table-cell;
    vertical-align: middle;
}

div.ac > ul > li.selected {
    background-color: #DCDCDC;
}

页面html代码：

<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Jquery实现仿搜索引擎文本框自动补全插件 - autocomplete</title>

<script src="__PUBLIC__/dwz/js/jquery-1.7.min.js" type="text/javascript"></script>
<script src="__PUBLIC__/autocomplete/jquery.autocomplete.js?v=2"></script>
<link rel="stylesheet" href="__PUBLIC__/autocomplete/jquery.autocomplete.css" type="text/css" />
<script type="text/javascript">
$(function(){

    $("#tt").AutoComplete({
        'data':'__MODULE__/test/suggestCom2',
    });

})
</script>

</head>
<body>

<style type="text/css">
*{margin:0;padding:0;list-style-type:none;}
a,img{border:0;}
.demo{width:720px;margin:30px auto;}
.demo h2{font-size:16px;color:#3366cc;height:30px;}
.demo li{float:left;}
.text,.button{background:url(http://su.bdimg.com/static/superpage/img/spis_031ddf34.png) no-repeat;}
.text{width:529px;height:22px;padding:4px 7px;padding:6px 7px 2px\9;font:16px arial;border:1px solid #cdcdcd;border-color:#9a9a9a #cdcdcd #cdcdcd #9a9a9a;vertical-align:top;outline:none;margin:0 5px 0 0;}
.button{width:95px;height:32px;padding:0;padding-top:2px\9;border:0;background-position:0 -35px;background-color:#ddd;cursor:pointer}
</style>

<div class="demo">
    <h2>autocomplete联想输入测试</h2>
    <form action="" method="post" name="searchform" id="searchform" class="searchinfo">
        <ul>
            <li><input type="text" id="tt" value="" class="text" /></li>
            <li><input type="submit" value="搜索" class="button" /></li>
        </ul>
    </form>
</div>

</body>
</html>