load twemoji dynamically as colr or sbix; fix monospace

res/css/_common.scss

@@ -34,6 +34,7 @@ body {
 
 pre, code {
     font-family: $monospace-font-family;
+    font-size: 100% ! important;
 }
 
 .error, .warning {

res/themes/light/css/_fonts.scss

@@ -33,23 +33,40 @@
     src: url('$(res)/fonts/Nunito/Nunito-Bold.ttf') format('truetype');
 }
 
-/*
+/* latin-ext */
- * Fira Mono
- * Used for monospace copy, i.e. code
- */
-
 @font-face {
-    font-family: 'Fira Mono';
+    font-family: 'Inconsolata';
-    src: url('$(res)/fonts/Fira_Mono/FiraMono-Regular.ttf') format('truetype');
+    font-style: normal;
     font-weight: 400;
-    font-style: normal;
+    src: local('Inconsolata Regular'), local('Inconsolata-Regular'), url('$(res)/fonts/Inconsolata/QldKNThLqRwH-OJ1UHjlKGlX5qhExfHwNJU.woff2') format('woff2');
+    unicode-range: U+0100-024F, U+0259, U+1E00-1EFF, U+2020, U+20A0-20AB, U+20AD-20CF, U+2113, U+2C60-2C7F, U+A720-A7FF;
 }
-
+/* latin */
 @font-face {
-    font-family: 'Fira Mono';
+    font-family: 'Inconsolata';
-    src: url('$(res)/fonts/Fira_Mono/FiraMono-Bold.ttf') format('truetype');
-    font-weight: 700;
     font-style: normal;
+    font-weight: 400;
+    font-display: swap;
+    src: local('Inconsolata Regular'), local('Inconsolata-Regular'), url('$(res)/fonts/Inconsolata/QldKNThLqRwH-OJ1UHjlKGlZ5qhExfHw.woff2') format('woff2');
+    unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
+}
+/* latin-ext */
+@font-face {
+    font-family: 'Inconsolata';
+    font-style: normal;
+    font-weight: 700;
+    font-display: swap;
+    src: local('Inconsolata Bold'), local('Inconsolata-Bold'), url('$(res)/fonts/Inconsolata/QldXNThLqRwH-OJ1UHjlKGHiw71n5_zaDpwm80E.woff2') format('woff2');
+    unicode-range: U+0100-024F, U+0259, U+1E00-1EFF, U+2020, U+20A0-20AB, U+20AD-20CF, U+2113, U+2C60-2C7F, U+A720-A7FF;
+}
+/* latin */
+@font-face {
+    font-family: 'Inconsolata';
+    font-style: normal;
+    font-weight: 700;
+    font-display: swap;
+    src: local('Inconsolata Bold'), local('Inconsolata-Bold'), url('$(res)/fonts/Inconsolata/QldXNThLqRwH-OJ1UHjlKGHiw71p5_zaDpwm.woff2') format('woff2');
+    unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
 }
 
 /* a COLR/CPAL version of Twemoji used for consistent cross-browser emoji
@@ -57,7 +74,11 @@
  * using the fix from https://github.com/mozilla/twemoji-colr/issues/50 to
  * work on macOS
  */
+/*
+// except we now load it dynamically via FontManager to handle browsers
+// which can't render COLR/CPAL still
 @font-face {
     font-family: "Twemoji Mozilla";
     src: url('$(res)/fonts/Twemoji_Mozilla/TwemojiMozilla.woff2') format('woff2');
 }
+*/

res/themes/light/css/_light.scss

@@ -5,11 +5,11 @@
    Arial empirically gets it right, hence prioritising Arial here. */
 /* We fall through to Twemoji for emoji rather than falling through
    to native Emoji fonts (if any) to ensure cross-browser consistency */
-$font-family: Nunito, 'Twemoji Mozilla', Arial, Helvetica, Sans-Serif;
+$font-family: Nunito, Twemoji, 'Apple Color Emoji', 'Noto Color Emoji', Arial, Helvetica, Sans-Serif;
 
 // XXX: In theory this should be Fira, but it's a bit ugly.
 // TODO: make it consistent cross-browser
-$monospace-font-family: Consolas, 'Liberation Mono', Courier, 'Twemoji Mozilla', monospace;
+$monospace-font-family: Inconsolata, Twemoji, 'Apple Color Emoji', 'Noto Color Emoji', Courier, monospace;
 
 // unified palette
 // try to use these colors when possible

src/components/structures/LoggedInView.js

@@ -24,6 +24,7 @@ import { DragDropContext } from 'react-beautiful-dnd';
 import { KeyCode, isOnlyCtrlOrCmdKeyEvent } from '../../Keyboard';
 import PageTypes from '../../PageTypes';
 import CallMediaHandler from '../../CallMediaHandler';
+import { fixupColorFonts } from '../../utils/FontManager';
 import sdk from '../../index';
 import dis from '../../dispatcher';
 import sessionStore from '../../stores/SessionStore';
@@ -118,6 +119,8 @@ const LoggedInView = React.createClass({
         this._matrixClient.on("accountData", this.onAccountData);
         this._matrixClient.on("sync", this.onSync);
         this._matrixClient.on("RoomState.events", this.onRoomStateEvents);
+
+        fixupColorFonts();
     },
 
     componentDidUpdate(prevProps) {

src/utils/FontManager.js

@@ -0,0 +1,78 @@
+/*
+Copyright 2019 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.
+*/
+
+/*
+ * Based on...
+ * ChromaCheck 1.16
+ * author Roel Nieskens, https://pixelambacht.nl
+ * MIT license
+ */
+
+let colrFontSupported = undefined;
+
+async function isColrFontSupported() {
+    if (colrFontSupported !== undefined) {
+        return colrFontSupported;
+    }
+
+    try {
+        let canvas = document.createElement('canvas');
+        let context = canvas.getContext('2d');
+        let img = new Image();
+        let fontCOLR = 'd09GRgABAAAAAAKAAAwAAAAAAowAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABDT0xSAAACVAAAABYAAAAYAAIAJUNQQUwAAAJsAAAAEgAAABLJAAAQT1MvMgAAAYAAAAA6AAAAYBfxJ0pjbWFwAAABxAAAACcAAAAsAAzpM2dseWYAAAH0AAAAGgAAABoNIh0kaGVhZAAAARwAAAAvAAAANgxLumdoaGVhAAABTAAAABUAAAAkCAEEAmhtdHgAAAG8AAAABgAAAAYEAAAAbG9jYQAAAewAAAAGAAAABgANAABtYXhwAAABZAAAABsAAAAgAg4AHW5hbWUAAAIQAAAAOAAAAD4C5wsecG9zdAAAAkgAAAAMAAAAIAADAAB4AWNgZGAAYQ5+qdB4fpuvDNIsDCBwaQGTAIi+VlscBaJZGMDiHAxMIAoAtjIF/QB4AWNgZGBgYQACOAkUQQWMAAGRABAAAAB4AWNgZGBgYGJgAdMMUJILJMQgAWICAAH3AC4AeAFjYGFhYJzAwMrAwDST6QwDA0M/hGZ8zWDMyMmAChgFkDgKQMBw4CXDSwYWEBdIYgAFBgYA/8sIdAAABAAAAAAAAAB4AWNgYGBkYAZiBgYeBhYGBSDNAoRA/kuG//8hpDgjWJ4BAFVMBiYAAAAAAAANAAAAAQAAAAAEAAQAAAMAABEhESEEAPwABAD8AAAAeAEtxgUNgAAAAMHHIQTShTlOAty9/4bf7AARCwlBNhBw4L/43qXjYGUmf19TMuLcj/BJL3XfBg54AWNgZsALAAB9AAR4AWNgYGAEYj4gFgGygGwICQACOwAoAAAAAAABAAEAAQAAAA4AAAAAyP8AAA==';
+        let svg = '<svg xmlns="http://www.w3.org/2000/svg" width="20" height="100" style="background:#fff;fill:#000;">' +
+                      '<style type="text/css">'+
+                          '@font-face{font-family:"chromacheck-colr";src:url(data:application/x-font-woff;base64,'+fontCOLR+') format("woff");}'+
+                      '</style>'+
+                      '<text x="0" y="0" font-size="20">' +
+                          '<tspan font-family="chromacheck-colr" x="0" dy="20">&#xe900;</tspan>' + // COLR
+                      '</text>' +
+                  '</svg>';
+        canvas.width  = 20;
+        canvas.height = 100;
+
+        img.src = 'data:image/svg+xml;charset=utf-8,' + encodeURIComponent(svg);
+
+        // FIXME wait for safari load our colr font
+        const wait = ms => new Promise((r, j)=>setTimeout(r, ms))
+        await wait(500);
+
+        context.drawImage(img, 0, 0);
+        colrFontSupported = (context.getImageData(10, 10, 1, 1).data[0] === 200);
+    }
+    catch (e) {
+        console.error("Couldn't load colr font", e);
+        colrFontSupported = false;
+    }
+    return colrFontSupported;
+}
+
+export async function fixupColorFonts() {
+    if (colrFontSupported !== undefined) {
+        return;
+    }
+
+    // we programatically add the right fontface.
+    let font;
+    if (await isColrFontSupported()) {
+        font = new FontFace("Twemoji", "url('../../fonts/Twemoji_Mozilla/TwemojiMozilla-colr.woff2')", {});
+    }
+    else {
+        font = new FontFace("Twemoji", "url('../../fonts/Twemoji_Mozilla/TwemojiMozilla-sbix.woff2')", {});
+    }
+    document.fonts.add(font);
+}
+