/*搜索智能提示 v1.0 date:2015.09.08 */ ;(function(w,$){ $.fn.intellSearch = function(options){ var jthis = this; var _dftOpts = { url:"",//请求地址或数组 property:"",//要显示的json对象的属性 itemNumber:5,//显示的条数 isEmptyRequest:false,//focus空白是否发起请求 defaultValue:"",//默认值 width:0,//列表宽度 aligner:jthis,//要对齐的元素 maxHeight:-1,//最大高度 ajax:{ timeout:3000,//超时时间 cache:true//是否缓存 }, event:{ /*参数说明:parameter:{jthis:"jq input",jItem:"jq item",data:"json result",event:"event"}*/ setData:null,//设置参数 itemClick:null,//点击项触发 enterKeydown:null,//按下enter键触发 beforeRender:null,//所有项呈现前触发 endRender:null,//所有项呈现后触发 itemBeforeRender:null,//项呈现前触发 itemAfterRender:null,//项呈现后触发 beforeSend:null//发送请求前触发 } }; $.extend(_dftOpts,options); if(!_dftOpts.url){ throw Error("url不能为空！"); } var jResult; var _value = ""; var _ajax = _dftOpts.ajax; var _event = _dftOpts.event; var _cache = []; var _focusCount = 0;//防止focus触发多次(sogou) /*on window*/ window.intellObj = window.intellObj || {}; /*for global event*/ window.intellDocumentClick = window.intellDocumentClick || function(e){ if(!window.intellObj.jthis){ return; } if(e.target !== window.intellObj.jthis[0]){ setIntellObj(null); } } window.intellDocumentKeydown = window.intellDocumentKeydown || function(e){ var jthis = window.intellObj.jthis; if(!jthis){ return; } var code = e.keyCode; var value = window.intellObj.value; var jResult,jCurItem,keyword; if(code === 13 || code === 38 || code === 40){ jResult = window.intellObj.jResult; jItems = jResult.find("li"); jCurItem = jResult.find("li.cur"); if(code === 13){ if(jCurItem.length > 0){ jCurItem.click(); }else{ setIntellObj(null); if(_event.enterKeydown){ _event.enterKeydown({"jthis":jthis,"event":e}); } } jthis.blur(); }else if(jItems.length > 0){ if(code === 38){ if(jCurItem.length <= 0){ jCurItem = jItems.last(); jCurItem.addClass("cur"); keyword = jCurItem.text(); }else{ var index = jCurItem.index(); jCurItem.removeClass("cur"); if(index <= 0){ keyword = value; }else{ jCurItem = jItems.eq(index-1); jCurItem.addClass("cur"); keyword = jCurItem.text(); } } jthis.val(keyword); }else{ if(jCurItem.length <= 0){ jCurItem = jItems.first(); jCurItem.addClass("cur"); keyword = jCurItem.text(); }else{ var index = jCurItem.index(); jCurItem.removeClass("cur"); if(index + 1 >= jItems.length){ keyword = value; }else{ jCurItem = jItems.eq(index+1); jCurItem.addClass("cur"); keyword = jCurItem.text(); } } jthis.val(keyword); } } } } /*event handler*/ $.fn.unintell = function(){ remove(); } $(document).unbind({click:window.intellDocumentClick,keydown:window.intellDocumentKeydown}) .bind({click:window.intellDocumentClick,keydown:window.intellDocumentKeydown}); jthis.focus(function(){ _focusCount++; if(_focusCount > 1){ return; } if(window.intellObj.jthis && jthis !== window.intellObj.jthis){ setIntellObj(null); } var keyword = attrValue(); if(keyword === _dftOpts.defaultValue){ keyword = ""; attrValue(keyword); } if(keyword || _dftOpts.isEmptyRequest){ sendRequest(); } }) jthis.blur(function(){ _focusCount = 0; if(!attrValue()){ attrValue(_dftOpts.defaultValue); } }) jthis.keyup(function(e){ if(e.keyCode === 38 || e.keyCode === 40){ return; } var keyword = attrValue(); if(!keyword){ remove(); window.intellObj.value = _value = ""; return; } if(keyword !== _value){ window.intellObj.value = _value = keyword; sendRequest(); } }); return initBox(); /*function*/ function initBox(){ attrValue(_dftOpts.defaultValue); return jthis; } function initIntell(){ generate(); register(); setIntellObj({jthis:jthis,jResult:jResult}); } function generate(){ var offset = _dftOpts.aligner.offset(); var width = _dftOpts.width ? _dftOpts.width : _dftOpts.aligner.width(); jResult = $("<ul>",{"class":"intellResult"}); jResult.width(width).css({"position":"absolute","left":offset.left,"top":offset.top + jthis.outerHeight()}); $("body").append(jResult); if(_dftOpts.maxHeight > 0){ jResult.height(_dftOpts.maxHeight).css("overflowY","scroll"); } } function remove(){ if(jResult){ jResult.remove(); jResult = null; } } function register(){ jResult.on("click","li",function(){ var jItem = $(this); var index = jItem.index(); var keyword = jItem.text(); attrValue(keyword); _value = keyword; if(_event.itemClick){ _event.itemClick({"jthis":jthis,"jItem":jItem,"item":_cache[index]}); } }).on("mouseenter","li",function(){ $(this).siblings("li").removeClass("cur").end().addClass("cur"); }).on("mouseleave","li",function(){ $(this).removeClass("cur"); }); } function setIntellObj(obj){ if(!obj){ if(window.intellObj.jResult){ window.intellObj.jResult.remove(); } window.intellObj.jthis = null; window.intellObj.jResult = null; }else{ window.intellObj.jthis = obj.jthis; window.intellObj.jResult = obj.jResult; } } function sendRequest(){ var data; if(_event.setData){ data = _event.setData({"jthis":jthis}); } $.ajax({ url:_dftOpts.url, data:data, cache:_ajax.cache, timeout:_ajax.timeout, beforeSend:function(xhr){ if(_event.beforeSend){ _event.beforeSend(xhr); } }, success:function(data){ remove(); showData(data); }, error:null }); } function showData(data){ data = $.trim(data) ? $.parseJSON(data) : data; if(_event.beforeRender){ var rs = _event.beforeRender({"jthis":jthis,"data":data}); if(rs === false){ return; } if(rs !== undefined){ data = rs; } } if(!data){ return; } var jItem,jA,jSpan,hasProp,item,text,otherTexts,isRender,index; var list = $.isArray(data) ? data : [data]; var length = list.length; length = length > _dftOpts.itemNumber ? _dftOpts.itemNumber : list.length; if(length <= 0){ return; } initIntell(); _cache.length = 0; hasProp = list[0][_dftOpts.property]; for(var i=0;i<length;i++){ item = list[i]; if(item === null || item === undefined){ continue; } text = hasProp ? item[_dftOpts.property] : item; text = $.trim(text.toString()); if(text === ""){ continue; } jItem = $("<li>",{"class":"intellResult_item"}); jA = $("<a>",{"title":text}).appendTo(jItem); jSpan = $("<span>").appendTo(jA); index = text.toLowerCase().indexOf(_value.toLowerCase()); otherTexts = splitText(text,_value,index); if(otherTexts){ jSpan.text(text.substr(index,_value.length)); if(otherTexts.length > 1){ $("<b>",{"text":otherTexts[0]}).insertBefore(jSpan); $("<b>",{"text":otherTexts[1]}).insertAfter(jSpan); }else{ if(index === 0){ $("<b>",{"text":otherTexts[0]}).insertAfter(jSpan); }else{ $("<b>",{"text":otherTexts[0]}).insertBefore(jSpan); } } }else{ jSpan.text(text); } isRender = true; if(_event.itemBeforeRender){ isRender = _event.itemBeforeRender({"jthis":jthis,"jItem":jItem,"item":item}); } if(isRender !== false){ jResult.append(jItem); if(_event.itemAfterRender){ _event.itemAfterRender({"jthis":jthis,"jItem":jItem,"item":item}); } } _cache.push(item); } if(_event.endRender){ _event.endRender({"jthis":jthis}); } jResult.show(); } function attrValue(value){ if(!value && value != ""){ return $.trim(jthis.val()); } jthis.val(value); } function splitText(text,value,index){ var tlength = text.length; var vlength = value.length; if(index === -1){ return null; } if(index === 0){ if(index + vlength >= tlength){ return null; } return [text.substr(index + vlength)]; } if(index + vlength >= tlength){ return [text.substr(0,index)]; } return [text.substr(0,index),text.substr(index + vlength)]; } } })(window,jQuery);
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