fix(#25): Remove cheerio

scripts/filters/external-link.js

@@ -2,49 +2,60 @@
 
 'use strict';
 
-hexo.extend.filter.register('after_post_render', function(data) {
+hexo.extend.filter.register('after_post_render', function (data) {
   var theme = hexo.theme.config;
-  if (!(theme.external_link && theme.external_link.icon && theme.external_link.icon.enable)) return;
+  if (
+    !theme.external_link ||
+    !theme.external_link.icon ||
+    !theme.external_link.icon.enable
+  ) {
+    return;
+  }
 
   var url = require('url');
-  var cheerio;
   var config = this.config;
-
-  if (!cheerio) cheerio = require('cheerio');
-
-  var $ = cheerio.load(data.content, { decodeEntities: false });
   var siteHost = url.parse(config.url).hostname || config.url;
 
-  $('a').each(function() {
-    var href = $(this).attr('href');
-
-    if (!href) return;
-
-    var className = $(this).attr('class');
-    var classNameWhitelist = [
-      'friends-plugin__item',
-    ];
-
-    if (className && classNameWhitelist.includes(className)) return;
-
-    var data = url.parse(href);
-
-    if (!data.protocol) return;
-    if (data.hostname === siteHost) return;
-
-    var fa_prefix = theme.fa_prefix || 'fa';
-
-    $(this).replaceWith(function() {
-      return $(
+  data.content = data.content.replace(
+    /(<a([^>]*)href="([^"]*)"([^>]*)>([^<]*)<\/a>)/gim,
+    function (match, all, attrBegin, href, attrEnd, html) {
+      // Exit if the href attribute doesn't exists.
+      if (!href) {
+        return match;
+      }
+
+      // Exit if the url has same host with `config.url`, which means isn't an external link.
+      var link = url.parse(href);
+      if (!link.protocol || link.hostname === siteHost) {
+        return match;
+      };
+
+      var attrOther = attrBegin + attrEnd;
+      var className = '';
+
+      attrOther.split(/\s/gim).forEach(attr => {
+        var nAttr = attr.replace(/["']*/gim, '');
+        var aKey = (nAttr.split('=')[0] || '').trim();
+        var aValue = (nAttr.split('=')[1] || '').trim();
+
+        if (aKey === 'class') {
+          className = aValue;
+        }
+      });
+
+      // Exit if the class name is in whitelist.
+      var whiteList = ['friends-plugin__item'];
+      if (className && whiteList.includes(className)) {
+        return match;
+      }
+
+      var fa_prefix = theme.fa_prefix || 'fa';
+      return (
         '<span class="external-link">' +
-          '<a href="' + href + '" target="_blank" rel="noopener">' +
-            $(this).html() +
-          '</a>' +
-          '<i class="' + fa_prefix + ' fa-external-link"></i>' +
+          `<a ${attrBegin} href="${href}" ${attrEnd}>${html}</a>` +
+          `<i class="${fa_prefix} fa-external-link"></i>` +
         '</span>'
       );
-    });
-  });
-
-  data.content = $.html();
+    }
+  );
 }, 0);

scripts/filters/lazyload.js

@@ -2,36 +2,35 @@
 
 'use strict';
 
-hexo.extend.filter.register('after_post_render', function(data) {
+hexo.extend.filter.register('after_post_render', function (data) {
   var theme = hexo.theme.config;
-  if (!(theme.lazyload && theme.lazyload.enable)) return;
-
-  var cheerio;
-
-  if (!cheerio) cheerio = require('cheerio');
-
-  var $ = cheerio.load(data.content, { decodeEntities: false });
-
-  $('img').each(function () {
-    var $img = $(this);
-    // 最小 1 * 1 像素的透明 gif 图片
-    var loadingGIF = `/${(theme.images && theme.images.replace(/^\/+|\/+$/gm,'')) || 'images'}/loading.svg`;
-    var loadingBlock = 'data:image/gif;base64,R0lGODdhAQABAPAAAMPDwwAAACwAAAAAAQABAAACAkQBADs=';
-    var placeholder;
-
-    if (theme.lazyload.placeholder === 'gif') {
-      placeholder = loadingGIF;
-    } else if (theme.lazyload.placeholder === 'block') {
-      placeholder = loadingBlock;
-    }
-
-    $img.addClass('lazyload');
-    $img.attr('data-src', $img.attr('src'));
-    $img.attr('src', placeholder);
-
-    if (theme.lazyload.placeholder) {
-      $img.addClass(theme.lazyload.placeholder);
+  if (!theme.lazyload || !theme.lazyload.enable) {
+    return;
+  }
+
+  data.content = data.content.replace(
+    /<img([^>]*)src="([^"]*)"([^>]*)>/gim,
+    function (match, attrBegin, src, attrEnd) {
+      // Exit if the src doesn't exists.
+      if (!src) {
+        return match;
+      }
+
+      // Smallest 1 * 1 pixel transparent gif
+      var loadingBlock = 'data:image/gif;base64,R0lGODdhAQABAPAAAMPDwwAAACwAAAAAAQABAAACAkQBADs=';
+      var loadingGIF = `/${(theme.images && theme.images.replace(/^\/+|\/+$/gm,'')) || 'images'}/loading.svg`;
+      var phClassName = theme.lazyload.placeholder;
+      var placeholder = '';
+
+      if (phClassName === 'gif') {
+        placeholder = loadingGIF;
+      } else if (phClassName === 'block') {
+        placeholder = loadingBlock;
+      }
+
+      return `
+        <img ${attrBegin} class="lazyload lazyload-${phClassName}"
+          src="${placeholder}" data-src="${src}" ${attrEnd}>`;
     }
-  });
-  data.content = $.html();
+  );
 }, 1);

scripts/filters/post-heading.js

@@ -3,18 +3,28 @@
 'use strict';
 
 hexo.extend.filter.register('after_post_render', function (data) {
-  var cheerio;
+  var tagName = `h[1-6]`;
+  var attrId = `id="([^"]*)"`;
+  var tagNotEnd = `([^>]*)`;
+  var regAttrId = tagNotEnd + attrId + tagNotEnd;
+  var regHTagInnermost = new RegExp(
+    `<${tagName}${regAttrId}>((?:(?!<\\/?${tagName}${regAttrId}>)(?:\\s|\\S))*?)<\/${tagName}>`,
+    'gim'
+  );
 
-  if (!cheerio) cheerio = require('cheerio');
+  data.content = data.content.replace(
+    regHTagInnermost,
+    function (match, attrBegin, id, attrEnd, html) {
+      if (!id) {
+        return match;
+      }
 
-  var $ = cheerio.load(data.content, { decodeEntities: false });
-
-  $('h1,h2,h3,h4,h5,h6').each(function () {
-    var $heading = $(this);
-    var headingTxt = $heading.text().trim();
-
-    $heading.html('<span class="heading-link">' + headingTxt + '</span>');
-  });
-
-  data.content = $.html();
+      var newHtml = (html.replace(/<[^>]+>/gim, '') || '').trim();
+      return `
+        <h2 ${attrBegin} id="${id}" ${attrEnd}>
+          <span class="heading-link">${newHtml}</span>
+        </h2>
+      `;
+    }
+  );
 }, 0);

scripts/filters/resize-img.js

@@ -3,24 +3,44 @@
 'use strict';
 
 hexo.extend.filter.register('after_post_render', function (data) {
-  var cheerio;
-
-  if (!cheerio) cheerio = require('cheerio');
-
-  var $ = cheerio.load(data.content, { decodeEntities: false });
-
-  $('img').each(function () {
-    var $img = $(this);
-
-    if (!$img.attr('src')) return;
-    if ($img.attr('src').includes('?size=')) {
-      var size = $img.attr('src').split('?size=')[1] && $img.attr('src').split('?size=')[1].toLowerCase();
-      var w = size.split('x')[0] + 'px';
-      var h = size.split('x')[1] + 'px';
-
-      $img.css({ width: w, height: h });
+  data.content = data.content.replace(
+    /<img([^>]*)src="([^"]*)"([^>]*)>/gim,
+    function (match, attrBegin, src, attrEnd) {
+      // Exit if the src doesn't exists.
+      if (!src) {
+        return match;
+      }
+
+      // A flag that sets the size of image.
+      var RESIZE_IMG_SIGN = '?size=';
+      var srcLower = src.toLowerCase();
+      // Exit if the src doesn't include the sign of resize.
+      if (!srcLower.includes(RESIZE_IMG_SIGN)) {
+        return match;
+      }
+
+      var size = srcLower.split(RESIZE_IMG_SIGN)[1];
+      // Exit if hasn't the value of width or height.
+      if (!size) {
+        return match;
+      }
+
+      // The sign between width and height.
+      var MULTIPLY_SIGN = 'x';
+      var w = size.split(MULTIPLY_SIGN)[0];
+      var h = size.split(MULTIPLY_SIGN)[1];
+      var style = '';
+      
+      if (w) {
+        style += `width: ${w}px;`;
+      }
+      if (h) {
+        style += `height: ${h}px;`;
+      }
+
+      var attr1 = attrBegin.trim();
+      var attr2 = attrEnd.trim();
+      return `<img ${attr1} src="${src}" style="${style}" ${attr2}>`;
     }
-  });
-
-  data.content = $.html();
+  );
 }, 0);

scripts/filters/shake-file.js

@@ -2,10 +2,12 @@
 
 'use strict';
 
-hexo.extend.filter.register('after_generate', () => {
+hexo.extend.filter.register('after_generate', function () {
   var theme = hexo.theme.config;
 
-  if (!theme.shake_file) return;
+  if (!theme.shake_file) {
+    return;
+  }
 
   if (!(theme.sidebar && theme.sidebar.enable)) {
     hexo.route.remove('js/sidebar.js');

scripts/filters/wrap-table.js

@@ -3,13 +3,14 @@
 'use strict';
 
 hexo.extend.filter.register('after_post_render', function (data) {
-  var cheerio;
+  data.content = data.content.replace(
+    /(<table[^>]*>(?!<\/table).*<\/table>)/gim,
+    function (match, table) {
+      if (!table) {
+        return match;
+      }
 
-  if (!cheerio) cheerio = require('cheerio');
-
-  var $ = cheerio.load(data.content, { decodeEntities: false });
-  var $wrapper = $('<div class="table-container"></div>');
-
-  $('table').wrap($wrapper);
-  data.content = $.html();
+      return `<div class="table-container">${table}</div>`;
+    }
+  );
 }, 0);

source/css/_common/components/widgets/lazyload.styl

 .lazyload {
-  &.block {
+  &-block {
     box-sizing: content-box;
     min-width: 30px;
     min-height: 30px;