纯JS搜索页面内容-我的扩展版本

时间：2014-05-13 22:31:43 收藏：0 阅读：540
我扩展了什么?
1.不区分大小写,且替换后保留原大小写内容.
2.自动滚动到所属位置.
时间比较赶也比较粗糙.
原作张鑫旭
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$.tmp_textSearch_str = "";
$.fn.textSearch = function(str, options) { //纯JS字符串搜索
    var 
defaults = {
        divFlag: true,
        divStr: " ",
        markClass: "",
        markColor: "red",
        nullReport: true,
        scroll: 1,
        callback: function() {
            return 
false;
        }
    };
    var 
sets = $.extend({}, defaults, options || {}), clStr;
    if 
(sets.markClass) {
        clStr = "class=‘" 
+ sets.markClass + "‘";
    } else 
{
        clStr = "style=‘color:" 
+ sets.markColor + ";‘";
    }
 
    //对前一次高亮处理的文字还原     
    $("span[data-keyrole=‘mark‘]").each(function() {
        var 
text = document.createTextNode($(this).text());
        $(this).replaceWith($(text));
    });
 
 
    //字符串正则表达式关键字转化
    $.regTrim = function(s) {
        var 
imp = /[\^\.\\\|\(\)\*\+\-\$\[\]\?]/g;
        var 
imp_c = {};
        imp_c["^"] = "\\^";
        imp_c["."] = "\\.";
        imp_c["\\"] = "\\\\";
        imp_c["|"] = "\\|";
        imp_c["("] = "\\(";
        imp_c[")"] = "\\)";
        imp_c["*"] = "\\*";
        imp_c["+"] = "\\+";
        imp_c["-"] = "\\-";
        imp_c["$"] = "\$";
        imp_c["["] = "\\[";
        imp_c["]"] = "\\]";
        imp_c["?"] = "\\?";
        s = s.replace(imp, function(o) {
            return 
imp_c[o];
        });
        return 
s;
    };
    $(this).each(function() {
        var 
t = $(this);
        str = $.trim(str);
        if 
(str === "") {
            //alert("Keyword is empty.");
            return 
false;
        } else 
{
 
            //将关键字push到数组之中
            var 
arr = [];
            if 
(sets.divFlag) {
 
                arr = str.split(sets.divStr);
            } else 
{
                arr.push(str);
            }
        }
        var 
v_html = t.html();
        //删除注释
        v_html = v_html.replace(/<!--(?:.*)\-->/g, "");
 
        //过滤HTML片段
        var 
tags = /[^<>]+|<(\/?)([A-Za-z]+)([^<>]*)>/g;
        var 
a = v_html.match(tags), test = 0;
        $.each(a, function(i, c) {
            if 
(!/<(?:.|\s)*?>/.test(c)) {//非标签
                //开始执行替换
                $.each(arr, function(index, con) {
                    if 
(con === "") {
                        return;
                    }
                    var 
reg = new 
RegExp("(" 
+ $.regTrim(con) + ")", "ig");
                    if 
(reg.test(c)) {
 
                        //正则替换
                        c = c.replace(reg, "#♂spstart# $1 #♂spend#");
                        test = 1;
                    }
                });
                c = c.replace(/#♂spstart#/g, "<span data-keyrole=‘mark‘ " + clStr + ">").replace(/#♂spend#/g, "</span>");
                a[i] = c;
            }
        });
        //将支离数组重新组成字符串
        var 
new_html = a.join("");
        $(this).html(new_html);
 
        if 
(test === 0 && sets.nullReport) {
            alert("No result found in this page.");
            return 
false;
        }
        sets.callback();
        if 
(sets.scroll) {
            //自动滚动
            $.tmp_textSearch_str = $.tmp_textSearch_str || str;
            if 
($.tmp_textSearch_str == str) {
                $.tmp_textSearch_scollCount = $.tmp_textSearch_scollCount === undefined ? 0 : ($.tmp_textSearch_scollCount + 1);
            } else 
{
                $.tmp_textSearch_str = str;
                $.tmp_textSearch_scollCount = 0;
            }
            var 
span = $("span[data-keyrole=‘mark‘]")[$.tmp_textSearch_scollCount];
            if 
(!span) {
                $.tmp_textSearch_scollCount = 0;
                span = $("span[data-keyrole=‘mark‘]")[0];
            }
            var 
toTop = $(span).offset().top - 10;
            $(‘html,body‘).animate({scrollTop: toTop}, window.navigator.appName == ‘Opera‘ 
? 0 : 100);
        }
 
    });
};
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