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Addon that refreshes xterm upon webfont load #1368

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Addon that refreshes xterm upon webfont load #1368

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b6ba743
Addon that refreshes xterm upon webfont load
vincentwoo Apr 4, 2018
0e65a36
Return promise that returns xterm instance from addon
vincentwoo Apr 10, 2018
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20 changes: 20 additions & 0 deletions demo/webfont/index.html
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<html>
<head>
<link href="https://fonts.googleapis.com/css?family=Roboto+Mono:400,700" rel="stylesheet">
<link rel="stylesheet" href="../../build/xterm.css" />
<script src="../../build/xterm.js"></script>
<script src="../../build/addons/webfont/webfont.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/fontfaceobserver/2.0.13/fontfaceobserver.standalone.js"></script>
</head>

<body>
<div id="term"></div>

<script>
Terminal.applyAddon(webfont)
const term = new Terminal({ fontFamily: 'Roboto Mono', lineHeight: 0.9, fontSize: 15 })
term.loadWebfontAndOpen(document.getElementById('term'));
term.write("Python 2.7.14\r\n \r\nEveryone can modify this shell in real time.\r\nIt's a sandbox that works exactly like a native shell.\r\n\r\n\u001b]0;IPython: home/coderpad\u0007\r\n\u001b[?1l\u001b[6n\u001b[?2004h\u001b[?25l\u001b[0m\u001b[?7l\u001b[0m\u001b[J\u001b[0;38;5;2m>>> \u001b[4D\u001b[4C\u001b[?7h\u001b[0m\u001b[?12l\u001b[?25h\u001b[?25l\u001b[?7l\u001b[0m\r\r\n\r\r\n\r\r\n\r\r\n\r\r\n\r\r\n\r\r\n\r\r\n\r\r\n\r\r\n\r\r\n\r\r\n\u001b[12A\u001b[4C\u001b[?7h\u001b[0m\u001b[?12l\u001b[?25h\u001b]0;IPython: home/coderpad\u0007\u001b[1;36m File \u001b[1;32m\"/home/coderpad/solution.py\"\u001b[1;36m, line \u001b[1;32m2\u001b[0m\r\n\u001b[1;33m print 'Hello, World\u001b[0m\r\n\u001b[1;37m ^\u001b[0m\r\n\u001b[1;31mSyntaxError\u001b[0m\u001b[1;31m:\u001b[0m EOL while scanning string literal\r\n\r\n\r\n\u001b[?1l\u001b[6n\u001b[?2004h\u001b[?25l\u001b[0m\u001b[?7l\u001b[0m\u001b[J\u001b[0;38;5;2m>>> \u001b[4D\u001b[4C\u001b[?7h\u001b[0m\u001b[?12l\u001b[?25h\u001b[?25l\u001b[?7l\u001b[0m\r\r\n\r\r\n\u001b[2A\u001b[4C\u001b[?7h\u001b[0m\u001b[?12l\u001b[?25h\u001b[?25l\u001b[?7l\u001b[0m\r\r\n\r\r\n\r\r\n\r\r\n\r\r\n\r\r\n\u001b[6A\u001b[4C\u001b[?7h\u001b[0m\u001b[?12l\u001b[?25h\u001b[?25l\u001b[?7l\u001b[?7h\u001b[0m\u001b[?12l\u001b[?25h\u001b[?25l\u001b[?7l\u001b[?7h\u001b[0m\u001b[?12l\u001b[?25h\u001b[?25l\u001b[?7l\u001b[?7h\u001b[0m\u001b[?12l\u001b[?25h\u001b[?25l\u001b[?7l\u001b[?7h\u001b[0m\u001b[?12l\u001b[?25h\u001b[?25l\u001b[?7l\u001b[?7h\u001b[0m\u001b[?12l\u001b[?25h\u001b[?25l\u001b[?7l\u001b[?7h\u001b[0m\u001b[?12l\u001b[?25h\u001b[?25l\u001b[?7l\u001b[?7h\u001b[0m\u001b[?12l\u001b[?25h\u001b[?25l\u001b[?7l\u001b[?7h\u001b[0m\u001b[?12l\u001b[?25h\u001b[?25l\u001b[?7l\u001b[?7h\u001b[0m\u001b[?12l\u001b[?25h\u001b[?25l\u001b[?7l\u001b[?7h\u001b[0m\u001b[?12l\u001b[?25h\u001b[?25l\u001b[?7l\u001b[?7h\u001b[0m\u001b[?12l\u001b[?25h")
</script>
</body>
</html>
5 changes: 5 additions & 0 deletions src/addons/webfont/package.json
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{
"name": "xterm.webfont",
"main": "webfont.js",
"private": true
}
11 changes: 11 additions & 0 deletions src/addons/webfont/tsconfig.json
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{
"compilerOptions": {
"module": "commonjs",
"target": "es5",
"rootDir": ".",
"outDir": "../../../lib/addons/webfont/",
"sourceMap": true,
"removeComments": true,
"declaration": true
}
}
20 changes: 20 additions & 0 deletions src/addons/webfont/webfont.ts
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/// <reference path="../../../typings/xterm.d.ts"/>

import { Terminal } from 'xterm';

export function apply(terminalConstructor: typeof Terminal): void {
(<any>terminalConstructor.prototype).loadWebfontAndOpen = function (element: HTMLElement): void {
const FontFaceObserver = (typeof window === 'object' && (<any>window).FontFaceObserver);
if (!FontFaceObserver) {
console.warn('FontFaceObserver not available, opening xterm normally!');
return this.open(element);
}
const regular = new FontFaceObserver(this.options.fontFamily).load();
const bold = new FontFaceObserver(this.options.fontFamily, { weight: 'bold' }).load();

return regular.constructor.all([regular, bold]).then(() => {
this.open(element);
return this;
});
};
}