From b0862cd030127f35d5b8ef92411911474d7b31a6 Mon Sep 17 00:00:00 2001
From: Richard Hansen <rhansen@rhansen.org>
Date: Mon, 1 Mar 2021 02:21:22 -0500
Subject: [PATCH] ace: Delete all `$$INCLUDE_CSS` logic

The intention of the deleted code was to reduce the number of fetches,
but it only saved a single fetch due to implementation flaws. The
right way to reduce the number of fetches is to use a bundling
technology such as webpack, and this change makes it easier to do so.
---
 src/node/utils/Minify.js | 39 -----------------------------
 src/static/js/ace.js     | 54 +++++++---------------------------------
 2 files changed, 9 insertions(+), 84 deletions(-)

diff --git a/src/node/utils/Minify.js b/src/node/utils/Minify.js
index f4826021..95446346 100644
--- a/src/node/utils/Minify.js
+++ b/src/node/utils/Minify.js
@@ -220,44 +220,6 @@ const minify = async (req, res) => {
   }
 };
 
-// find all includes in ace.js and embed them.
-const getAceFile = async () => {
-  let data = await fs.readFile(path.join(ROOT_DIR, 'js/ace.js'), 'utf8');
-
-  // Find all includes in ace.js and embed them
-  const filenames = [];
-  if (settings.minify) {
-    const regex = /\$\$INCLUDE_[a-zA-Z_]+\((['"])([^'"]*)\1\)/gi;
-    // This logic can be simplified via String.prototype.matchAll() once support for Node.js
-    // v11.x and older is dropped.
-    let matches;
-    while ((matches = regex.exec(data)) != null) {
-      filenames.push(matches[2]);
-    }
-  }
-
-  data += 'Ace2Editor.EMBEDED = Ace2Editor.EMBEDED || {};\n';
-
-  // Request the contents of the included file on the server-side and write
-  // them into the file.
-  await Promise.all(filenames.map(async (filename) => {
-    // Hostname "invalid.invalid" is a dummy value to allow parsing as a URI.
-    const baseURI = 'http://invalid.invalid';
-    let resourceURI = baseURI + path.join('/static/', filename);
-    resourceURI = resourceURI.replace(/\\/g, '/'); // Windows (safe generally?)
-
-    const [status, , body] = await requestURI(resourceURI, 'GET', {});
-    const error = !(status === 200 || status === 404);
-    if (!error) {
-      data += `Ace2Editor.EMBEDED[${JSON.stringify(filename)}] = ${
-        JSON.stringify(status === 200 ? body || '' : null)};\n`;
-    } else {
-      console.error(`getAceFile(): error getting ${resourceURI}. Status code: ${status}`);
-    }
-  }));
-  return data;
-};
-
 // Check for the existance of the file and get the last modification date.
 const statFile = async (filename, dirStatLimit) => {
   /*
@@ -366,7 +328,6 @@ const getFileCompressed = async (filename, contentType) => {
 };
 
 const getFile = async (filename) => {
-  if (filename === 'js/ace.js') return await getAceFile();
   if (filename === 'js/require-kernel.js') return requireDefinition();
   return await fs.readFile(path.join(ROOT_DIR, filename));
 };
diff --git a/src/static/js/ace.js b/src/static/js/ace.js
index 3fc9ac77..6d07ecba 100644
--- a/src/static/js/ace.js
+++ b/src/static/js/ace.js
@@ -178,39 +178,8 @@ const Ace2Editor = function () {
   // returns array of {error: <browser Error object>, time: +new Date()}
   this.getUnhandledErrors = () => loaded ? info.ace_getUnhandledErrors() : [];
 
-  const sortFilesByEmbeded = (files) => {
-    const embededFiles = [];
-    let remoteFiles = [];
-
-    if (Ace2Editor.EMBEDED) {
-      for (let i = 0, ii = files.length; i < ii; i++) {
-        const file = files[i];
-        if (Object.prototype.hasOwnProperty.call(Ace2Editor.EMBEDED, file)) {
-          embededFiles.push(file);
-        } else {
-          remoteFiles.push(file);
-        }
-      }
-    } else {
-      remoteFiles = files;
-    }
-
-    return {embeded: embededFiles, remote: remoteFiles};
-  };
-
   const addStyleTagsFor = (doc, files) => {
-    const sorted = sortFilesByEmbeded(files);
-    const embededFiles = sorted.embeded;
-    const remoteFiles = sorted.remote;
-
-    if (embededFiles.length > 0) {
-      const css = embededFiles.map((f) => Ace2Editor.EMBEDED[f]).join('\n');
-      const style = doc.createElement('style');
-      style.type = 'text/css';
-      style.appendChild(doc.createTextNode(css));
-      doc.head.appendChild(style);
-    }
-    for (const file of remoteFiles) {
+    for (const file of files) {
       const link = doc.createElement('link');
       link.rel = 'stylesheet';
       link.type = 'text/css';
@@ -229,19 +198,14 @@ const Ace2Editor = function () {
     debugLog('Ace2Editor.init()');
     this.importText(initialCode);
 
-    // calls to these functions ($$INCLUDE_...)  are replaced when this file is processed
-    // and compressed, putting the compressed code from the named file directly into the
-    // source here.
-    // these lines must conform to a specific format because they are passed by the build script:
-    const includedCSS = [];
-    const $$INCLUDE_CSS = (filename) => { includedCSS.push(filename); };
-    $$INCLUDE_CSS('../static/css/iframe_editor.css');
-    $$INCLUDE_CSS(`../static/css/pad.css?v=${clientVars.randomVersionString}`);
-    includedCSS.push(...hooks.callAll('aceEditorCSS').map(
-        // Allow urls to external CSS - http(s):// and //some/path.css
-        (p) => /\/\//.test(p) ? p : `../static/plugins/${p}`));
-    $$INCLUDE_CSS(
-        `../static/skins/${clientVars.skinName}/pad.css?v=${clientVars.randomVersionString}`);
+    const includedCSS = [
+      '../static/css/iframe_editor.css',
+      `../static/css/pad.css?v=${clientVars.randomVersionString}`,
+      ...hooks.callAll('aceEditorCSS').map(
+          // Allow urls to external CSS - http(s):// and //some/path.css
+          (p) => /\/\//.test(p) ? p : `../static/plugins/${p}`),
+      `../static/skins/${clientVars.skinName}/pad.css?v=${clientVars.randomVersionString}`,
+    ];
 
     const skinVariants = clientVars.skinVariants.split(' ').filter((x) => x !== '');