本文介绍如何利用
hexo-generator-search插件为Hexo博客添加本地全文搜索
原理
hexo-generator-search实际上是根据网页内容生成了一个数据文件，格式是XML或者JSON。然后通过JS代码去匹配这个文件的内容，从而达到搜索的目的。
最终效果
image.png
步骤
安装 hexo-generator-search
$ npm install hexo-generator-search --save
配置
在_config.yml中添加
search:
path: search.xml
field: post
使用
再次生成博客，就会发现public根目录下多了search.xml文件。
写一个搜索框：
使用Bootstrap框架的modal应该是极好的。 修改Hexo主题，（对此不了解的可以查看我的自定义Hexo主题的相关内容），在layout.ejs中添加一个modal：
<%- partial('_partial/search-modal') %>
根据Bootstrap文档，modal需要尽量作为 body 标签的直接子元素。
search-modal.ejs的代码如下：
<div class="modal fade" id="searchModal">
<div class="modal-dialog modal-lg" role="document">
<div class="modal-content">
<div class="modal-body">
<i class="fa fa-search" aria-hidden="true"></i> 搜索
<input type="text" class="form-control" id="searchInput" placeholder="Keyword">
<div class="search-content" id="searchResult"></div>
</div>
</div>
</div>
</div>
链接加上
data-toggle="modal" href="#searchModal"属性即可实现modal的展开
搜索代码：
// A local search script with the help of [hexo-generator-search](https://github.com/PaicHyperionDev/hexo-generator-search)
// Copyright (C) 2015
// Joseph Pan <http://github.com/wzpan>
// Shuhao Mao <http://github.com/maoshuhao>
// This library is free software; you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation; either version 2.1 of the
// License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
// 02110-1301 USA
//
var searchFunc = function(path, search_id, content_id) {
'use strict';
$.ajax({
url: path,
dataType: "xml",
success: function( xmlResponse ) {
// get the contents from search data
var datas = $( "entry", xmlResponse ).map(function() {
return {
title: $( "title", this ).text(),
content: $("content",this).text(),
url: $( "url" , this).text()
};
}).get();
var $input = document.getElementById(search_id);
var $resultContent = document.getElementById(content_id);
$input.addEventListener('input', function(){
var str='<ul class="search-result-list">';
var keywords = this.value.trim().toLowerCase().split(/[\s-]+/);
$resultContent.innerHTML = "";
if (this.value.trim().length <= 0) {
return;
}
// perform local searching
datas.forEach(function(data) {
var isMatch = true;
var content_index = [];
if (!data.title || data.title.trim() === '') {
data.title = "Untitled";
}
var data_title = data.title.trim().toLowerCase();
var data_content = data.content.trim().replace(/<[^>]+>/g,"").toLowerCase();
var data_url = data.url;
var index_title = -1;
var index_content = -1;
var first_occur = -1;
// only match artiles with not empty contents
if (data_content !== '') {
keywords.forEach(function(keyword, i) {
index_title = data_title.indexOf(keyword);
index_content = data_content.indexOf(keyword);
if( index_title < 0 && index_content < 0 ){
isMatch = false;
} else {
if (index_content < 0) {
index_content = 0;
}
if (i == 0) {
first_occur = index_content;
}
// content_index.push({index_content:index_content, keyword_len:keyword_len});
}
});
} else {
isMatch = false;
}
// show search results
if (isMatch) {
str += "<li><a href='"+ data_url +"' class='search-result-title'>"+ data_title +"</a>";
var content = data.content.trim().replace(/<[^>]+>/g,"");
if (first_occur >= 0) {
// cut out 100 characters
var start = first_occur - 20;
var end = first_occur + 80;
if(start < 0){
start = 0;
}
if(start == 0){
end = 100;
}
if(end > content.length){
end = content.length;
}
var match_content = content.substr(start, end);
// highlight all keywords
keywords.forEach(function(keyword){
var regS = new RegExp(keyword, "gi");
match_content = match_content.replace(regS, "<em class="search-keyword">"+keyword+"</em>");
});
str += "<p class="search-result">" + match_content +"...</p>"
}
str += "</li>";
}
});
str += "</ul>";
$resultContent.innerHTML = str;
});
}
});
}
添加链接
<%- js('js/search') %>
<script>searchFunc('<%= url_for('search.xml') %>', 'searchInput', 'searchResult');</script>
高亮关键词
keywords.forEach(function(keyword){
var regS = new RegExp(keyword, "gi");
data_title = data_title.replace(regS, "<em class="search-keyword">"+keyword+"</em>");
});
.search-keyword{
color: #c7254e;
}
本文原始发表于：https://wycode.cn/blog/search 转载请注明出处
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