Fix HTML export missing a bunch of Compound variables (#12774)

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Michael Telatynski 2024-07-15 11:33:41 +01:00 committed by GitHub
parent 38e1da5626
commit b4ef5d3cc3
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8 changed files with 315 additions and 173 deletions

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@ -91,6 +91,7 @@
"classnames": "^2.2.6",
"commonmark": "^0.31.0",
"counterpart": "^0.18.6",
"css-tree": "^2.3.1",
"diff-dom": "^5.0.0",
"diff-match-patch": "^1.0.5",
"emojibase-regex": "15.3.2",
@ -167,6 +168,7 @@
"@types/commonmark": "^0.27.4",
"@types/content-type": "^1.1.5",
"@types/counterpart": "^0.18.1",
"@types/css-tree": "^2.3.8",
"@types/diff-match-patch": "^1.0.32",
"@types/escape-html": "^1.0.1",
"@types/express": "^4.17.21",

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@ -0,0 +1,132 @@
/*
Copyright 2024 The Matrix.org Foundation C.I.C.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
import os from "node:os";
import path from "node:path";
import * as fsp from "node:fs/promises";
import * as fs from "node:fs";
import JSZip from "jszip";
import { test, expect } from "../../element-web-test";
// Based on https://github.com/Stuk/jszip/issues/466#issuecomment-2097061912
async function extractZipFileToPath(file: string, outputPath: string): Promise<JSZip> {
if (!fs.existsSync(outputPath)) {
fs.mkdirSync(outputPath, { recursive: true });
}
const data = await fsp.readFile(file);
const zip = await JSZip.loadAsync(data, { createFolders: true });
await new Promise<void>((resolve, reject) => {
let entryCount = 0;
let errorOut = false;
zip.forEach(() => {
entryCount++;
}); // there is no other way to count the number of entries within the zip file.
zip.forEach((relativePath, zipEntry) => {
if (errorOut) {
return;
}
const outputEntryPath = path.join(outputPath, relativePath);
if (zipEntry.dir) {
if (!fs.existsSync(outputEntryPath)) {
fs.mkdirSync(outputEntryPath, { recursive: true });
}
entryCount--;
if (entryCount === 0) {
resolve();
}
} else {
void zipEntry
.async("blob")
.then(async (content) => Buffer.from(await content.arrayBuffer()))
.then((buffer) => {
const stream = fs.createWriteStream(outputEntryPath);
stream.write(buffer, (error) => {
if (error) {
reject(error);
errorOut = true;
}
});
stream.on("finish", () => {
entryCount--;
if (entryCount === 0) {
resolve();
}
});
stream.end(); // extremely important on Windows. On Mac / Linux, not so much since those platforms allow multiple apps to read from the same file. Windows doesn't allow that.
})
.catch((e) => {
errorOut = true;
reject(e);
});
}
});
});
return zip;
}
test.describe("HTML Export", () => {
test.use({
displayName: "Alice",
room: async ({ app, user }, use) => {
const roomId = await app.client.createRoom({ name: "Important Room" });
await app.viewRoomByName("Important Room");
await use({ roomId });
},
});
test("should export html successfully and match screenshot", async ({ page, app, room }) => {
// Send a bunch of messages to populate the room
for (let i = 1; i < 10; i++) {
await app.client.sendMessage(room.roomId, { body: `Testing ${i}`, msgtype: "m.text" });
}
// Wait for all the messages to be displayed
await expect(
page.locator(".mx_EventTile_last .mx_MTextBody .mx_EventTile_body").getByText("Testing 9"),
).toBeVisible();
await page.getByRole("button", { name: "Room info" }).click();
await page.getByRole("menuitem", { name: "Export Chat" }).click();
const downloadPromise = page.waitForEvent("download");
await page.getByRole("button", { name: "Export", exact: true }).click();
const download = await downloadPromise;
const dirPath = path.join(os.tmpdir(), "html-export-test");
const zipPath = `${dirPath}.zip`;
await download.saveAs(zipPath);
const zip = await extractZipFileToPath(zipPath, dirPath);
await page.goto(`file://${dirPath}/${Object.keys(zip.files)[0]}/messages.html`);
await expect(page).toMatchScreenshot("html-export.png", {
mask: [
page.getByText("This is the start of export", { exact: false }),
page.locator(".mx_DateSeparator_dateHeading"),
page.locator(".mx_MessageTimestamp"),
],
});
});
});

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@ -163,81 +163,77 @@ export default class HTMLExporter extends Exporter {
<script src="js/script.js"></script>
<title>${_t("export_chat|html_title")}</title>
</head>
<body style="height: 100vh;">
<div
id="matrixchat"
style="height: 100%; overflow: auto"
class="notranslate"
>
<div class="mx_MatrixChat_wrapper" aria-hidden="false">
<div class="mx_MatrixChat">
<main class="mx_RoomView">
<div class="mx_LegacyRoomHeader light-panel">
<div class="mx_LegacyRoomHeader_wrapper" aria-owns="mx_RightPanel">
<div class="mx_LegacyRoomHeader_avatar">
<div class="mx_DecoratedRoomAvatar">
${roomAvatar}
</div>
</div>
<div class="mx_LegacyRoomHeader_name">
<div
dir="auto"
class="mx_LegacyRoomHeader_nametext"
title="${safeRoomName}"
>
${safeRoomName}
</div>
</div>
<div class="mx_LegacyRoomHeader_topic" dir="auto"> ${safeTopic} </div>
</div>
</div>
${previousMessagesLink}
<div class="mx_MainSplit">
<div class="mx_RoomView_body">
<div
class="mx_RoomView_timeline mx_RoomView_timeline_rr_enabled"
>
<div
class="
mx_AutoHideScrollbar
mx_ScrollPanel
mx_RoomView_messagePanel
"
>
<div class="mx_RoomView_messageListWrapper">
<ol
class="mx_RoomView_MessageList"
aria-live="polite"
role="list"
<body style="height: 100vh;" class="cpd-theme-light">
<div id="matrixchat" style="height: 100%; overflow: auto">
<div class="mx_MatrixChat_wrapper" aria-hidden="false">
<div class="mx_MatrixChat">
<main class="mx_RoomView">
<div class="mx_LegacyRoomHeader light-panel">
<div class="mx_LegacyRoomHeader_wrapper" aria-owns="mx_RightPanel">
<div class="mx_LegacyRoomHeader_avatar">
<div class="mx_DecoratedRoomAvatar">
${roomAvatar}
</div>
</div>
<div class="mx_LegacyRoomHeader_name">
<div
dir="auto"
class="mx_LegacyRoomHeader_nametext"
title="${safeRoomName}"
>
${
currentPage == 0
? `<div class="mx_NewRoomIntro">
${roomAvatar}
<h2> ${safeRoomName} </h2>
<p> ${safeCreatedText} <br/><br/> ${safeExportedText} </p>
<br/>
<p> ${safeTopicText} </p>
</div>`
: ""
}
${content}
</ol>
${safeRoomName}
</div>
</div>
<div class="mx_LegacyRoomHeader_topic" dir="auto"> ${safeTopic} </div>
</div>
</div>
${previousMessagesLink}
<div class="mx_MainSplit">
<div class="mx_RoomView_body">
<div
class="mx_RoomView_timeline mx_RoomView_timeline_rr_enabled"
>
<div
class="
mx_AutoHideScrollbar
mx_ScrollPanel
mx_RoomView_messagePanel
"
>
<div class="mx_RoomView_messageListWrapper">
<ol
class="mx_RoomView_MessageList"
aria-live="polite"
role="list"
>
${
currentPage == 0
? `<div class="mx_NewRoomIntro">
${roomAvatar}
<h2> ${safeRoomName} </h2>
<p> ${safeCreatedText} <br/><br/> ${safeExportedText} </p>
<br/>
<p> ${safeTopicText} </p>
</div>`
: ""
}
${content}
</ol>
</div>
</div>
</div>
<div class="mx_RoomView_statusArea">
<div class="mx_RoomView_statusAreaBox">
<div class="mx_RoomView_statusAreaBox_line"></div>
</div>
</div>
</div>
</div>
<div class="mx_RoomView_statusArea">
<div class="mx_RoomView_statusAreaBox">
<div class="mx_RoomView_statusAreaBox_line"></div>
</div>
</div>
${nextMessagesLink}
</main>
</div>
</div>
${nextMessagesLink}
</main>
</div>
</div>
</div>
<div id="snackbar"/>
</body>
</html>`;

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@ -14,74 +14,80 @@ See the License for the specific language governing permissions and
limitations under the License.
*/
import type { Rule, StyleSheet } from "css-tree";
import customCSS from "!!raw-loader!./exportCustomCSS.css";
const cssSelectorTextClassesRegex = /\.[\w-]+/g;
function mutateCssText(css: string): string {
// replace used fonts so that we don't have to bundle Inter & Inconsalata
const sansFont = `-apple-system, BlinkMacSystemFont, avenir next,
avenir, segoe ui, helvetica neue, helvetica, Ubuntu, roboto, noto, arial, sans-serif`;
return css
.replace(
/font-family: ?(Inter|'Inter'|"Inter")/g,
`font-family: -apple-system, BlinkMacSystemFont, avenir next,
avenir, segoe ui, helvetica neue, helvetica, Ubuntu, roboto, noto, arial, sans-serif`,
)
.replace(/font-family: ?(Inter|'Inter'|"Inter")/g, `font-family: ${sansFont}`)
.replace(/--cpd-font-family-sans: ?(Inter|'Inter'|"Inter")/g, `--cpd-font-family-sans: ${sansFont}`)
.replace(
/font-family: ?Inconsolata/g,
"font-family: Menlo, Consolas, Monaco, Liberation Mono, Lucida Console, monospace",
);
}
function isLightTheme(sheet: CSSStyleSheet): boolean {
return (<HTMLStyleElement>sheet.ownerNode)?.dataset.mxTheme?.toLowerCase() === "light";
}
function includeRule(rule: Rule, usedClasses: Set<string>): boolean {
if (rule.prelude.type === "Raw") {
// cull empty rules
if (rule.block.children.isEmpty) return false;
async function getRulesFromCssFile(path: string): Promise<CSSStyleSheet> {
const doc = document.implementation.createHTMLDocument("");
const styleElement = document.createElement("style");
const res = await fetch(path);
styleElement.textContent = await res.text();
// the style will only be parsed once it is added to a document
doc.body.appendChild(styleElement);
return styleElement.sheet!;
return rule.prelude.value.split(",").some((subselector) => {
const classes = subselector.trim().match(cssSelectorTextClassesRegex);
if (classes && !classes.every((c) => usedClasses.has(c.substring(1)))) {
return false;
}
return true;
});
}
return true;
}
// naively culls unused css rules based on which classes are present in the html,
// doesn't cull rules which won't apply due to the full selector not matching but gets rid of a LOT of cruft anyway.
// We cannot use document.styleSheets as it does not handle variables in shorthand properties sanely,
// see https://github.com/element-hq/element-web/issues/26761
const getExportCSS = async (usedClasses: Set<string>): Promise<string> => {
// only include bundle.css and the data-mx-theme=light styling
const stylesheets = Array.from(document.styleSheets).filter((s) => {
return s.href?.endsWith("bundle.css") || isLightTheme(s);
const csstree = await import("css-tree");
// only include bundle.css and light theme styling
const hrefs = ["bundle.css", "theme-light.css"].map((name) => {
return document.querySelector<HTMLLinkElement>(`link[rel="stylesheet"][href$="${name}"]`)?.href;
});
// If the light theme isn't loaded we will have to fetch & parse it manually
if (!stylesheets.some(isLightTheme)) {
const href = document.querySelector<HTMLLinkElement>('link[rel="stylesheet"][href$="theme-light.css"]')?.href;
if (href) stylesheets.push(await getRulesFromCssFile(href));
}
let css = "";
for (const stylesheet of stylesheets) {
for (const rule of stylesheet.cssRules) {
if (rule instanceof CSSFontFaceRule) continue; // we don't want to bundle any fonts
const selectorText = (rule as CSSStyleRule).selectorText;
for (const href of hrefs) {
if (!href) continue;
const res = await fetch(href);
const text = await res.text();
// only skip the rule if all branches (,) of the selector are redundant
if (
selectorText?.split(",").every((selector) => {
const classes = selector.match(cssSelectorTextClassesRegex);
if (classes && !classes.every((c) => usedClasses.has(c.substring(1)))) {
return true; // signal as a redundant selector
}
})
) {
continue; // skip this rule as it is redundant
const ast = csstree.parse(text, {
context: "stylesheet",
parseAtrulePrelude: false,
parseRulePrelude: false,
parseValue: false,
parseCustomProperty: false,
}) as StyleSheet;
for (const rule of ast.children) {
if (rule.type === "Atrule") {
if (rule.name === "font-face") {
continue;
}
}
css += mutateCssText(rule.cssText) + "\n";
if (rule.type === "Rule" && !includeRule(rule, usedClasses)) {
continue;
}
css += mutateCssText(csstree.generate(rule));
}
}

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@ -18,6 +18,11 @@ limitations under the License.
This file is raw-imported (imported as plain text) for the export bundle, which is the reason for the .css format and the colours being hard-coded hard-coded.
*/
html,
body {
font-size: var(--cpd-font-size-root) !important;
}
#snackbar {
display: flex;
visibility: hidden;

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@ -2479,6 +2479,11 @@
resolved "https://registry.yarnpkg.com/@types/counterpart/-/counterpart-0.18.4.tgz#e3e331b7e0d5496873d417839f3b2bbcf555bb73"
integrity sha512-aqBg5oAGo/qh/+wxUfuMadDu2WO0MEWOblyzwaM1Ske2xilUxBfgPqapAFVAfrVTDMVwa0UMarzGot8m64IAzA==
"@types/css-tree@^2.3.8":
version "2.3.8"
resolved "https://registry.yarnpkg.com/@types/css-tree/-/css-tree-2.3.8.tgz#0eabc115e45051b2f7abe51ee1531074b234ed19"
integrity sha512-zABG3nI2UENsx7AQv63tI5/ptoAG/7kQR1H0OvG+WTWYHOR5pfAT3cGgC8SdyCrgX/TTxJBZNmx82IjCXs1juQ==
"@types/diff-match-patch@^1.0.32":
version "1.0.36"
resolved "https://registry.yarnpkg.com/@types/diff-match-patch/-/diff-match-patch-1.0.36.tgz#dcef10a69d357fe9d43ac4ff2eca6b85dbf466af"