iHealth-app-demo/html/home/js/jianjiaotuisong_search.js

    // 基本信息（包括userAgent）
var baseInfo = null,
    // 基础环境信息（包括当前webview）
    baseEnv = null;
    
var $searchbarInput = $('#search-input'),
    // 搜索取消按钮
    $searchCancelBtn = $('.searchbar-cancel'),
    // 搜索框下面悬浮的搜索提示
    $searchSuggest = $('#searchValWrap'),
    // 搜索结果展示容器
    $searchtResult = $('#search_result'),
    // 搜索无结果时显示
    $noResultWrap = $('#no_result_wrap'),
    $tuisongList = $('#tuisong_list');

    
var lastId = 1,// 分页查询最后一页
    search_keyword = "",  
    iscroller,// iscroll 滚动条实例
    pagesize = 15,// 每页加载数据量
    hasMoreResults = false;
    
// 获取基础环境信息 
getBaseEnvPromise = function () {
    var env = {
        webview: plus&&plus.webview.currentWebview()
    };
    return Promise.resolve().then(function(res) {
        return env;
    });
},

// 初始化“推送”视图列表
initTuiSongList = function(data,keyword,isAppend) { 
    var html = template("tuisong_list_tmpl", {list:data});
    if(isAppend === true) {
        $tuisongList.append(html)
    } else {
        $tuisongList.html(html);
    }
    ellipsisText($tuisongList.find('li'),keyword);
},


getRowProps = function ($el) {
    var $textEllipsis = $el,
        $text = $textEllipsis.eq(0),
        $chart = $text.text('a'),
        enWidth = $chart.width(),
        $chart = $text.text('中'),
        zhWidth = $chart.width(),
        lineHeight = parseFloat($chart.css("lineHeight"), 10),
        rowHeight = $chart.height();
    $chart.text('');
    return {
        chartWidth: {
            zh: zhWidth,
            en: enWidth
        },
        rowHeight: Math.max(rowHeight, lineHeight),
        rowWidth: $el.width()
    };
},
replaceAll = function (text, arr) {
    var html = text;
    _.each(arr,function(kw) {
        var reg = new RegExp(kw+"(?!>)","gi");
        html = html.replace(reg,'<em>'+kw+'</em>');
    });
    return html;
},
highlineKeyword = function ($el,searchText) {
    var props = getRowProps($el),
        chartWidth = props.chartWidth,
        rowHeight = props.rowHeight,
        rowWidth = props.rowWidth,
        // 每行显示字符数（以中文字符为标准计算）
        chartNum = Math.floor(rowWidth / chartWidth.zh),
        // 排除指定数量字符所占宽度
        exceptNum = 0,
        // 行数
        rowNum = 1,
        // 预计显示总字符数
        expectedNum = chartNum * rowNum - exceptNum,
        $target = $el,
        // 目标文本
        text = $.trim($target.attr('data-text')),
        length = text.length,
        // 关键字数组
        kws = $.trim(searchText).replace(/\s+/g," ").split(" ");

    var fidx = 0,preFidx,diff = 0;
    $target.html(replaceAll(text, kws));
    if(Math.floor($target.height() / rowHeight) <= rowNum) {
        return ;
    }
    if(text.length > expectedNum) {
        fidx = text.indexOf(kws[0])+kws[0].length-1;
        diff = fidx - expectedNum + 1;
        preFidx =  fidx;
        diff = (diff<0)?0:diff;
        var preChar = (diff>0)?"...":"";
        $target.html(preChar+replaceAll(text.slice(diff,preFidx+1), kws)+"...");
        while((Math.floor($target.height() / rowHeight) <= rowNum) && (preFidx < length)) {
            preFidx++;
            $target.html(preChar+replaceAll(text.slice(diff,preFidx+1), kws)+"...");
        }
        if(preFidx == length && (Math.floor($target.height() / rowHeight) <= rowNum)) {
            diff = diff>0?(diff - 1):0;
            $target.html(preChar+replaceAll(text.slice(diff,preFidx), kws));
        } else if((Math.floor($target.height() / rowHeight) > rowNum)) {
            $target.html(preChar+replaceAll(text.slice(diff,preFidx), kws)+"...");
        }
    }
},
ellipsisText = function ($elements, searchText) {
    _.each($elements,function(el) {
        var $textEl = $(el).find(".j-text-ellipsis");
        _.each($textEl, function(t){
            highlineKeyword($(t),searchText);
        });
    });
},
// 分页查询列表
searchByPaging = function () {
    search_keyword = $searchbarInput.val();
    if(!$.trim(search_keyword)) {
        return ;
    }
    plus.nativeUI.showWaiting();
    // page: 分页索引，filter:搜素关键字，pagesize:每页条数
	var url = "/doctor/health/edu/getDoctorArticalList",
	params = {articleTitle: search_keyword,articleState:1,firstLevelCategoryId:""};
    getReqPromise(url,params,'get').then(function(res){
        if(res.status == 200) {
            lastId = lastId+1;
            if(!res.data || !res.data.length) {
                $searchtResult.hide();
                $noResultWrap.show();
            } else {
                if(res.data.length < pagesize) {
                    hasMoreResults = false;
                } else {
                    hasMoreResults = true;
                }
                $noResultWrap.hide();
                $searchtResult.show();
                initTuiSongList(res.data,search_keyword);
            }
            if(!iscroller) {
                iscroller = initScroller($searchtResult,url,
                function() { // 传递分页参数
                    return $.extend({},params,{page:lastId,filter:search_keyword});
                },function(res) {
                    lastId =  lastId+1;     
                    search_keyword = $searchbarInput.val();
                    initTuiSongList(res.data,search_keyword,true);
                    iscroller.refresh();
                });
            }
            iscroller.refresh();
        } else {
            plus.nativeUI.toast("搜索失败！");
        }
        plus.nativeUI.closeWaiting();
    }).catch(function(e) {
        console && console.error(e)
    });
},
// 滚动条分页实例初始化
initScroller = function($el,url,getData,pullUpAction) {
    var scroller;
    if(hasMoreResults) {
        scroller = $el.initScroll({pullDown: false,pullUpAction: function() {
            var data = getData();
            getReqPromise(url,data,'get').then(function(data) {
                if(pullUpAction && $.isFunction(pullUpAction)) {
                    pullUpAction(data);
                    updatePullUpText(scroller,data.list);
                }
            })
        }});
    } else {
        scroller = $el.initScroll({pullDown: false,pullUp: false});
    }  
    return scroller;
},
// 更新分页上拉加载的提示文本
updatePullUpText= function(scroller,list) {
    var $wrap = $(scroller.wrapper),
        $pullupLabel = $wrap.find('.pullUpLabel');
    if(!list || !list.length) {
        $pullupLabel.text('没有更多');
    } else {
        $pullupLabel.text('上拉加载更多');
    }
    scroller.on('refresh',function() {
        
        if(!list || !list.length) {
            $pullupLabel.text('没有更多');
        } else {
            $pullupLabel.text('上拉加载更多');
        }
    });
},
bindEvents = function(){
    $tuisongList.on('tap','.content-tuisong',function() {
		var articleId = $(this).attr('data-id'); 
        openWebviewExtras("jianjiaotuisong-xiangqing.html",{articleId:articleId});
        return false;
    })
    $tuisongList.on('tap','.tuisong',function() {
   	 	var articleId = $(this).attr('data-id'); 
	    openWebviewExtras("tuisong_duixiang.html",{articleId:articleId});
	    return false;
    });
    
    
    $('#cancel').on('click', function(){
        mui.back();
    })
    
    $searchbarInput.on('input', function(){
    	var html = $(this).val();
        var reg = new RegExp("<"+"(?!>)","gi");
		html = html.replace(reg,'&lt'); 
		var reg = new RegExp(">"+"(?!>)","gi");
		html = html.replace(reg,'&gt'); 
        $('#searchVal').html(html);
        $(".searchbar-clear").toggle($(this).val() != "");
        $searchSuggest.toggle($(this).val()!="");
        $searchtResult.hide();
        $noResultWrap.hide();
    }).on('keydown',function(e) {
        if (e.which === 13) {
            lastId = 1;
            $searchSuggest.hide();
            searchByPaging();
        }
    });
    
    $(".searchbar-clear").on('click', function(){
        $(this).hide();
        $searchbarInput.val("");
        $('#searchVal').html("");
        $searchSuggest.hide();
    });
    
    $searchSuggest.on('click',function() {
        lastId = 1;
        $searchSuggest.hide();
        searchByPaging();
    });
};

// 页面业务处理流程开始
new Promise(function(resolve, reject) {
    // TODO 临时放开
    //resolve(true);
    mui.plusReady(function() {
        // hrefhrefplus已经准备好，可以往下执行
        resolve(true);
        initKeyboardAndroid();
    });
}).then(function() {
    // 获取基础环境信息
    return getBaseEnvPromise().then(function(env) {
        baseEnv = env;
    }).then(function() {
        // 获取登录基本信息
//      baseInfo = getBaseInfo();
        openSoftKeyboard();
        $searchbarInput.focus();
        // 绑定页面事件
        bindEvents();
    })
}).catch(function(e) {
    plus.nativeUI.closeWaiting();
    console && console.error(e);
})