突出显示jQuery UI自动完成功能

Question

我在jQuery UI 1.8.6中使用自动完成功能.我想强调匹配的结果.但由于某些原因,当我使用正则表达式在匹配的字符周围添加"强"标签时,字符串将被转义.所以我看到了[strong]matching chars[/strong],而不是标记文字.

这是我目前正在使用的javascript:

$("#autocompleteinputfield").autocomplete({
    source: function (request, response) {
        $.ajax({
            url: "someservice",
            type: "GET",
            dataType: "json",
            data: { filter: request.term, maxResults: 10 },
            success: function (data) {
                response($.map(data, function (item) {
                    // return { label: item.ID + ' - ' + item.Name, id: item.ID, value: item.Name }
                    var regex = new RegExp("(?![^&;]+;)(?!<[^<>]*)(" + request.term.replace(/ ([\^\$\(\)\[\]\{\}\*\.\+\?\|\\])/ gi, "\\$1") + ")(?![^<>]*>)(?![^&;]+;)", "gi");

                    return {
                        label: (item.ID + ' - ' + item.Name).replace(regex, "<strong>$1</strong>"),
                        id: item.ID,
                        value: item.Name
                    }

                }))
            }
        });
    },
    select: function (event, ui) {
        alert(ui.item ? ("You picked '" + ui.item.label + "' with an ID of " + ui.item.id)
            : "Nothing selected, input was " + this.value);
    }
});

更新:

"输入"是在文本框中输入的文本(在这种情况下: [input type="text" id="autocompleteinputfield" /]

输出如下:

[{"Description":"Nothing meaningful","ID":3,"Name":"Joe Public?"}]

Answer 1

jQuery自动完成源代码是罪魁祸首.如果你查看实际的javascript文件,你会发现这个定义用于在自动完成列表中显示项目:

_renderItem: function( ul, item) {
    return $( "<li></li>" )
        .data( "item.autocomplete", item )
        .append( $( "<a></a>" ).text( item.label ) )
        .appendTo( ul );
}

你会看到它附加了".text(item.label)",这会导致html被转义.要解决这个问题,你必须放弃一个黑客来覆盖这个"_renderItem"方法,将标签作为纯文本附加的行替换为将标签附加为html的行.所以像这样更新你的代码:

$(function () {
    $("#autocompleteinputfield").autocomplete({
        // leave your code inside here exactly like it was
    })
    .data('autocomplete')._renderItem = function( ul, item ) {
        return $( "<li></li>" )
            .data( "item.autocomplete", item )
            .append( '<a>' + item.label + '</a>' )
            .appendTo( ul );
    };
});

更新:对于jQuery的版本> = 1.10,有一些小的修改:

$(function () {
    $("#autocompleteinputfield").autocomplete({
        // leave your code inside here exactly like it was
    })
    .data('ui-autocomplete')._renderItem = function( ul, item ) {
        return $( "<li></li>" )
            .data( "ui-autocomplete-item", item )
            .append( '<a>' + item.label + '</a>' )
            .appendTo( ul );
    };
});

Answer 2

$.extend($.ui.autocomplete.prototype, {
    _renderItem: function (ul, item) {
        var searchMask = this.element.val();
        var regEx = new RegExp(searchMask, "ig");
        var replaceMask = "<b style=\"color:green;\">$&</b>";
        var html = item.label.replace(regEx, replaceMask);

        return $("<li></li>")
            .data("item.autocomplete", item)
            .append($("<a></a>").html(html))
            .appendTo(ul);
    }
});