Next 侧栏添加 canvas 粒子时钟样式

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今天看到一个很好看也很使用的小工具 --- 粒子时钟。可以在自己博客的侧栏下面添加一个实时跳动的时钟，方便查看时间，样式是参考大佬的代码，这里我的工作只不过是将对应的代码添加到我 Next 自定义样式文件中。让我们来看看怎么添加这个样式吧！！！

前提

  • Next：8.10.1

注意：这里添加自定义样式的方法是基于 Next-8.10.1；其他 version 的主题不能保证可用，请根据实际情况做出相应修改。

启用自定义样式文件

  • _config.next.yml
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custom_file_path:
  # head: source/_data/head.njk
  #header: source/_data/header.njk
  sidebar: source/_data/sidebar.njk   ## 取消该行的注释；这个针对侧边栏的样式自定义
  #postMeta: source/_data/post-meta.njk
  postBodyEnd: source/_data/post-body-end.njk
  footer: source/_data/footer.njk
  bodyEnd: source/_data/body-end.njk
  variable: source/_data/variables.styl
  #mixin: source/_data/mixins.styl
  style: source/_data/styles.styl

需要了解：默认情况下，source/_data/sidebar.njk 是不存在的，所以需要我们自己在 站点目录 也就是 hexo-site 下新建一个同名文件，方便放入下面的自定义样式。

添加粒子钟样式

  • styles.styl ---- 在合适的地方添加下面的内容。
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// 粒子时钟样式
.site-overview {
  text-align: center;
}

canvas#canvas {
  margin-top: 20px;
}
  • sidebar.njk --- 添加以下内容
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<div style="">
  <canvas id="canvas" style="width:60%;">当前浏览器不支持canvas，请更换浏览器后再试</canvas>
</div>
<script>
(function(){

   var digit=
    [
        [
            [0,0,1,1,1,0,0],
            [0,1,1,0,1,1,0],
            [1,1,0,0,0,1,1],
            [1,1,0,0,0,1,1],
            [1,1,0,0,0,1,1],
            [1,1,0,0,0,1,1],
            [1,1,0,0,0,1,1],
            [1,1,0,0,0,1,1],
            [0,1,1,0,1,1,0],
            [0,0,1,1,1,0,0]
        ],//0
        [
            [0,0,0,1,1,0,0],
            [0,1,1,1,1,0,0],
            [0,0,0,1,1,0,0],
            [0,0,0,1,1,0,0],
            [0,0,0,1,1,0,0],
            [0,0,0,1,1,0,0],
            [0,0,0,1,1,0,0],
            [0,0,0,1,1,0,0],
            [0,0,0,1,1,0,0],
            [1,1,1,1,1,1,1]
        ],//1
        [
            [0,1,1,1,1,1,0],
            [1,1,0,0,0,1,1],
            [0,0,0,0,0,1,1],
            [0,0,0,0,1,1,0],
            [0,0,0,1,1,0,0],
            [0,0,1,1,0,0,0],
            [0,1,1,0,0,0,0],
            [1,1,0,0,0,0,0],
            [1,1,0,0,0,1,1],
            [1,1,1,1,1,1,1]
        ],//2
        [
            [1,1,1,1,1,1,1],
            [0,0,0,0,0,1,1],
            [0,0,0,0,1,1,0],
            [0,0,0,1,1,0,0],
            [0,0,1,1,1,0,0],
            [0,0,0,0,1,1,0],
            [0,0,0,0,0,1,1],
            [0,0,0,0,0,1,1],
            [1,1,0,0,0,1,1],
            [0,1,1,1,1,1,0]
        ],//3
        [
            [0,0,0,0,1,1,0],
            [0,0,0,1,1,1,0],
            [0,0,1,1,1,1,0],
            [0,1,1,0,1,1,0],
            [1,1,0,0,1,1,0],
            [1,1,1,1,1,1,1],
            [0,0,0,0,1,1,0],
            [0,0,0,0,1,1,0],
            [0,0,0,0,1,1,0],
            [0,0,0,1,1,1,1]
        ],//4
        [
            [1,1,1,1,1,1,1],
            [1,1,0,0,0,0,0],
            [1,1,0,0,0,0,0],
            [1,1,1,1,1,1,0],
            [0,0,0,0,0,1,1],
            [0,0,0,0,0,1,1],
            [0,0,0,0,0,1,1],
            [0,0,0,0,0,1,1],
            [1,1,0,0,0,1,1],
            [0,1,1,1,1,1,0]
        ],//5
        [
            [0,0,0,0,1,1,0],
            [0,0,1,1,0,0,0],
            [0,1,1,0,0,0,0],
            [1,1,0,0,0,0,0],
            [1,1,0,1,1,1,0],
            [1,1,0,0,0,1,1],
            [1,1,0,0,0,1,1],
            [1,1,0,0,0,1,1],
            [1,1,0,0,0,1,1],
            [0,1,1,1,1,1,0]
        ],//6
        [
            [1,1,1,1,1,1,1],
            [1,1,0,0,0,1,1],
            [0,0,0,0,1,1,0],
            [0,0,0,0,1,1,0],
            [0,0,0,1,1,0,0],
            [0,0,0,1,1,0,0],
            [0,0,1,1,0,0,0],
            [0,0,1,1,0,0,0],
            [0,0,1,1,0,0,0],
            [0,0,1,1,0,0,0]
        ],//7
        [
            [0,1,1,1,1,1,0],
            [1,1,0,0,0,1,1],
            [1,1,0,0,0,1,1],
            [1,1,0,0,0,1,1],
            [0,1,1,1,1,1,0],
            [1,1,0,0,0,1,1],
            [1,1,0,0,0,1,1],
            [1,1,0,0,0,1,1],
            [1,1,0,0,0,1,1],
            [0,1,1,1,1,1,0]
        ],//8
        [
            [0,1,1,1,1,1,0],
            [1,1,0,0,0,1,1],
            [1,1,0,0,0,1,1],
            [1,1,0,0,0,1,1],
            [0,1,1,1,0,1,1],
            [0,0,0,0,0,1,1],
            [0,0,0,0,0,1,1],
            [0,0,0,0,1,1,0],
            [0,0,0,1,1,0,0],
            [0,1,1,0,0,0,0]
        ],//9
        [
            [0,0,0,0,0,0,0],
            [0,0,1,1,1,0,0],
            [0,0,1,1,1,0,0],
            [0,0,1,1,1,0,0],
            [0,0,0,0,0,0,0],
            [0,0,0,0,0,0,0],
            [0,0,1,1,1,0,0],
            [0,0,1,1,1,0,0],
            [0,0,1,1,1,0,0],
            [0,0,0,0,0,0,0]
        ]//:
    ];

var canvas = document.getElementById('canvas');

if(canvas.getContext){
    var cxt = canvas.getContext('2d');
    //声明canvas的宽高
    var H = 100,W = 700;
    canvas.height = H;
    canvas.width = W;
    cxt.fillStyle = '#f00';
    cxt.fillRect(10,10,50,50);

    //存储时间数据
    var data = [];
    //存储运动的小球
    var balls = [];
    //设置粒子半径
    var R = canvas.height/20-1;
    (function(){
        var temp = /(\d)(\d):(\d)(\d):(\d)(\d)/.exec(new Date());
        //存储时间数字，由十位小时、个位小时、冒号、十位分钟、个位分钟、冒号、十位秒钟、个位秒钟这7个数字组成
        data.push(temp[1],temp[2],10,temp[3],temp[4],10,temp[5],temp[6]);
    })();

    /*生成点阵数字*/
    function renderDigit(index,num){
        for(var i = 0; i < digit[num].length; i++){
            for(var j = 0; j < digit[num][i].length; j++){
                if(digit[num][i][j] == 1){
                    cxt.beginPath();
                    cxt.arc(14*(R+2)*index + j*2*(R+1)+(R+1),i*2*(R+1)+(R+1),R,0,2*Math.PI);
                    cxt.closePath();
                    cxt.fill();
                }
            }
        }
    }

    /*更新时钟*/
    function updateDigitTime(){
        var changeNumArray = [];
        var temp = /(\d)(\d):(\d)(\d):(\d)(\d)/.exec(new Date());
        var NewData = [];
        NewData.push(temp[1],temp[2],10,temp[3],temp[4],10,temp[5],temp[6]);
        for(var i = data.length-1; i >=0 ; i--){
            //时间发生变化
            if(NewData[i] !== data[i]){
                //将变化的数字值和在data数组中的索引存储在changeNumArray数组中
                changeNumArray.push(i+'_'+(Number(data[i])+1)%10);
            }
        }
        //增加小球
        for(var i = 0; i< changeNumArray.length; i++){
            addBalls.apply(this,changeNumArray[i].split('_'));
        }
        data = NewData.concat();
    }

    /*更新小球状态*/
    function updateBalls(){
        for(var i = 0; i < balls.length; i++){
            balls[i].stepY += balls[i].disY;
            balls[i].x += balls[i].stepX;
            balls[i].y += balls[i].stepY;
            if(balls[i].x > W + R || balls[i].y > H + R){
                balls.splice(i,1);
                i--;
            }
        }
    }

    /*增加要运动的小球*/
    function addBalls(index,num){
        var numArray = [1,2,3];
        var colorArray =  ["#3BE","#09C","#A6C","#93C","#9C0","#690","#FB3","#F80","#F44","#C00"];
        for(var i = 0; i < digit[num].length; i++){
            for(var j = 0; j < digit[num][i].length; j++){
                if(digit[num][i][j] == 1){
                    var ball = {
                        x:14*(R+2)*index + j*2*(R+1)+(R+1),
                        y:i*2*(R+1)+(R+1),
                        stepX:Math.floor(Math.random() * 4 -2),
                        stepY:-2*numArray[Math.floor(Math.random()*numArray.length)],
                        color:colorArray[Math.floor(Math.random()*colorArray.length)],
                        disY:1
                    };
                    balls.push(ball);
                }
            }
        }
    }

    /*渲染*/
    function render(){
        //重置画布宽度，达到清空画布的效果
        canvas.height = 100;
        //渲染时钟
        for(var i = 0; i < data.length; i++){
            renderDigit(i,data[i]);
        }
        //渲染小球
        for(var i = 0; i < balls.length; i++){
            cxt.beginPath();
            cxt.arc(balls[i].x,balls[i].y,R,0,2*Math.PI);
            cxt.fillStyle = balls[i].color;
            cxt.closePath();
            cxt.fill();
        }
    }

    clearInterval(oTimer);
    var oTimer = setInterval(function(){
        //更新时钟
        updateDigitTime();
        //更新小球状态
        updateBalls();
        //渲染
        render();
    },50);
}

})();
</script>

<div class="site-overview-wrap sidebar-panel{% if not display_toc or toc(page.content).length <= 1 %} sidebar-panel-active{% endif %}">
<div class="site-overview">
    

{% if theme.recent_posts %}
    <div class="links-of-blogroll motion-element {{ "links-of-blogroll-" + theme.recent_posts_layout  }}">
    <div class="links-of-blogroll-title">
        <!-- modify icon to fire by szw -->
        <i class="fa fa-history fa-{{ theme.recent_posts_icon | lower }}" aria-hidden="true"></i>
        {{ theme.recent_posts_title }}
    </div>
    <ul class="links-of-blogroll-list">
        {% set posts = site.posts.sort('-date') %}
        {% for post in posts.slice('0', '5') %}
        <li>
            <a href="{{ url_for(post.path) }}" title="{{ post.title }}" target="_blank">{{ post.title }}</a>
        </li>
        {% endfor %}
    </ul>
    </div>
{% endif %}
</div>
</div>

至此，添加的样式就完成了，只需要常规清除缓存重新启用服务就可以在侧边栏看到粒子钟在跳动了。

hexo clean && hexo s

参考链接

[1] https://tding.top/archives/dd68b70.html