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demo.js
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demo.js
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$(function () {
// Custom theme to match style of xterm.js logo
var baseTheme = {
foreground: '#F8F8F8',
background: '#2D2E2C',
selection: '#5DA5D533',
black: '#1E1E1D',
brightBlack: '#262625',
red: '#CE5C5C',
brightRed: '#FF7272',
green: '#5BCC5B',
brightGreen: '#72FF72',
yellow: '#CCCC5B',
brightYellow: '#FFFF72',
blue: '#5D5DD3',
brightBlue: '#7279FF',
magenta: '#BC5ED1',
brightMagenta: '#E572FF',
cyan: '#5DA5D5',
brightCyan: '#72F0FF',
white: '#F8F8F8',
brightWhite: '#FFFFFF'
};
// vscode-snazzy https://github.com/Tyriar/vscode-snazzy
var otherTheme = {
foreground: '#eff0eb',
background: '#282a36',
selection: '#97979b33',
black: '#282a36',
brightBlack: '#686868',
red: '#ff5c57',
brightRed: '#ff5c57',
green: '#5af78e',
brightGreen: '#5af78e',
yellow: '#f3f99d',
brightYellow: '#f3f99d',
blue: '#57c7ff',
brightBlue: '#57c7ff',
magenta: '#ff6ac1',
brightMagenta: '#ff6ac1',
cyan: '#9aedfe',
brightCyan: '#9aedfe',
white: '#f1f1f0',
brightWhite: '#eff0eb'
};
var isBaseTheme = true;
var term = new window.Terminal({
fontFamily: '"Cascadia Code", Menlo, monospace',
theme: baseTheme,
cursorBlink: true,
allowProposedApi: true
});
term.open(document.querySelector('.demo .inner'));
var isWebglEnabled = false;
try {
const webgl = new window.WebglAddon.WebglAddon();
term.loadAddon(webgl);
isWebglEnabled = true;
} catch (e) {
console.warn('WebGL addon threw an exception during load', e);
}
// Cancel wheel events from scrolling the page if the terminal has scrollback
document.querySelector('.xterm').addEventListener('wheel', e => {
if (term.buffer.active.baseY > 0) {
e.preventDefault();
}
});
function runFakeTerminal() {
if (term._initialized) {
return;
}
term._initialized = true;
term.prompt = () => {
term.write('\r\n$ ');
};
// TODO: Use a nicer default font
term.writeln([
' Xterm.js is the frontend component that powers many terminals including',
' \x1b[3mVS Code\x1b[0m, \x1b[3mHyper\x1b[0m and \x1b[3mTheia\x1b[0m!',
'',
' ┌ \x1b[1mFeatures\x1b[0m ──────────────────────────────────────────────────────────────────┐',
' │ │',
' │ \x1b[31;1mApps just work \x1b[32mPerformance\x1b[0m │',
' │ Xterm.js works with most terminal Xterm.js is fast and includes an │',
' │ apps like bash, vim and tmux optional \x1b[3mWebGL renderer\x1b[0m │',
' │ │',
' │ \x1b[33;1mAccessible \x1b[34mSelf-contained\x1b[0m │',
' │ A screen reader mode is available Zero external dependencies │',
' │ │',
' │ \x1b[35;1mUnicode support \x1b[36mAnd much more...\x1b[0m │',
' │ Supports CJK 語 and emoji \u2764\ufe0f \x1b[3mLinks\x1b[0m, \x1b[3mthemes\x1b[0m, \x1b[3maddons\x1b[0m, │',
' │ \x1b[3mtyped API\x1b[0m, \x1b[3mdecorations\x1b[0m │',
' │ │',
' └────────────────────────────────────────────────────────────────────────────┘',
''
].join('\n\r'));
term.writeln('Below is a simple emulated backend, try running `help`.');
addDecoration(term);
prompt(term);
term.onData(e => {
switch (e) {
case '\u0003': // Ctrl+C
term.write('^C');
prompt(term);
break;
case '\r': // Enter
runCommand(term, command);
command = '';
break;
case '\u007F': // Backspace (DEL)
// Do not delete the prompt
if (term._core.buffer.x > 2) {
term.write('\b \b');
if (command.length > 0) {
command = command.slice(0, command.length - 1);
}
}
break;
default: // Print all other characters for demo
if (e >= String.fromCharCode(0x20) && e <= String.fromCharCode(0x7E) || e >= '\u00a0') {
command += e;
term.write(e);
}
}
});
// Create a very simple link provider which hardcodes links for certain lines
term.registerLinkProvider({
provideLinks(bufferLineNumber, callback) {
switch (bufferLineNumber) {
case 2:
callback([
{
text: 'VS Code',
range: { start: { x: 28, y: 2 }, end: { x: 34, y: 2 } },
activate() {
window.open('https://github.com/microsoft/vscode', '_blank');
}
},
{
text: 'Hyper',
range: { start: { x: 37, y: 2 }, end: { x: 41, y: 2 } },
activate() {
window.open('https://github.com/vercel/hyper', '_blank');
}
},
{
text: 'Theia',
range: { start: { x: 47, y: 2 }, end: { x: 51, y: 2 } },
activate() {
window.open('https://github.com/eclipse-theia/theia', '_blank');
}
}
]);
return;
case 8:
callback([
{
text: 'WebGL renderer',
range: { start: { x: 54, y: 8 }, end: { x: 67, y: 8 } },
activate() {
window.open('https://npmjs.com/package/xterm-addon-webgl', '_blank');
}
}
]);
return;
case 14:
callback([
{
text: 'Links',
range: { start: { x: 45, y: 14 }, end: { x: 49, y: 14 } },
activate() {
window.alert('You can handle links any way you want');
}
},
{
text: 'themes',
range: { start: { x: 52, y: 14 }, end: { x: 57, y: 14 } },
activate() {
isBaseTheme = !isBaseTheme;
term.options.theme = isBaseTheme ? baseTheme : otherTheme;
document.querySelector('.demo .inner').classList.toggle('other-theme', !isBaseTheme);
term.write(`\r\nActivated ${isBaseTheme ? 'xterm.js' : 'snazzy'} theme`);
prompt(term);
}
},
{
text: 'addons',
range: { start: { x: 60, y: 14 }, end: { x: 65, y: 14 } },
activate() {
window.open('/docs/guides/using-addons/', '_blank');
}
}
]);
return;
case 15: callback([
{
text: 'typed API',
range: { start: { x: 45, y: 15 }, end: { x: 53, y: 15 } },
activate() {
window.open('https://github.com/xtermjs/xterm.js/blob/master/typings/xterm.d.ts', '_blank');
}
},
{
text: 'decorations',
range: { start: { x: 56, y: 15 }, end: { x: 66, y: 15 } },
activate() {
window.open('https://github.com/xtermjs/xterm.js/blob/a351f5758a5126308b90d60b604b528462f6f051/typings/xterm.d.ts#L372', '_blank');
}
},
]);
return;
}
callback(undefined);
}
});
}
function prompt(term) {
command = '';
term.write('\r\n$ ');
}
var command = '';
var commands = {
help: {
f: () => {
const padding = 10;
function formatMessage(name, description) {
const maxLength = term.cols - padding - 3;
let remaining = description;
const d = [];
while (remaining.length > 0) {
// Trim any spaces left over from the previous line
remaining = remaining.trimStart();
// Check if the remaining text fits
if (remaining.length < maxLength) {
d.push(remaining);
remaining = '';
} else {
let splitIndex = -1;
// Check if the remaining line wraps already
if (remaining[maxLength] === ' ') {
splitIndex = maxLength;
} else {
// Find the last space to use as the split index
for (let i = maxLength - 1; i >= 0; i--) {
if (remaining[i] === ' ') {
splitIndex = i;
break;
}
}
}
d.push(remaining.substring(0, splitIndex));
remaining = remaining.substring(splitIndex);
}
}
const message = (
` \x1b[36;1m${name.padEnd(padding)}\x1b[0m ${d[0]}` +
d.slice(1).map(e => `\r\n ${' '.repeat(padding)} ${e}`)
);
return message;
}
term.writeln([
'Welcome to xterm.js! Try some of the commands below.',
'',
...Object.keys(commands).map(e => formatMessage(e, commands[e].description))
].join('\n\r'));
prompt(term);
},
description: 'Prints this help message',
},
ls: {
f: () => {
term.writeln(['a', 'bunch', 'of', 'fake', 'files'].join('\r\n'));
term.prompt(term);
},
description: 'Prints a fake directory structure'
},
loadtest: {
f: () => {
let testData = [];
let byteCount = 0;
for (let i = 0; i < 50; i++) {
let count = 1 + Math.floor(Math.random() * 79);
byteCount += count + 2;
let data = new Uint8Array(count + 2);
data[0] = 0x0A; // \n
for (let i = 1; i < count + 1; i++) {
data[i] = 0x61 + Math.floor(Math.random() * (0x7A - 0x61));
}
// End each line with \r so the cursor remains constant, this is what ls/tree do and improves
// performance significantly due to the cursor DOM element not needing to change
data[data.length - 1] = 0x0D; // \r
testData.push(data);
}
let start = performance.now();
for (let i = 0; i < 1024; i++) {
for (const d of testData) {
term.write(d);
}
}
// Wait for all data to be parsed before evaluating time
term.write('', () => {
let time = Math.round(performance.now() - start);
let mbs = ((byteCount / 1024) * (1 / (time / 1000))).toFixed(2);
term.write(`\n\r\nWrote ${byteCount}kB in ${time}ms (${mbs}MB/s) using the ${isWebglEnabled ? 'webgl' : 'canvas'} renderer`);
term.prompt();
});
},
description: 'Simulate a lot of data coming from a process'
},
chars: {
f: () => {
const _1to8 = [];
for (let i = 1; i <= 8; i++) {
_1to8.push(i);
}
const _1to16 = [];
for (let i = 1; i <= 16; i++) {
_1to16.push(i);
}
const _1to24 = [];
for (let i = 1; i <= 24; i++) {
_1to24.push(i);
}
const _1to32 = [];
for (let i = 1; i <= 32; i++) {
_1to32.push(i);
}
const _0to35 = [];
for (let i = 0; i <= 35; i++) {
_0to35.push(i);
}
const _1to64 = [];
for (let i = 1; i <= 64; i++) {
_1to64.push(i);
}
const _0to255 = [];
for (let i = 17; i <= 255; i++) {
_0to255.push(i);
}
const lines = [
['Ascii ─', 'abc123'],
['CJK ─', '汉语, 漢語, 日本語, 한국어'],
['Powerline ─', '\ue0b2\ue0b0\ue0b3\ue0b1\ue0b6\ue0b4\ue0b7\ue0b5\ue0ba\ue0b8\ue0bd\ue0b9\ue0be\ue0bc'],
['Box drawing ┬', '┌─┬─┐ ┏━┳━┓ ╔═╦═╗ ┌─┲━┓ ╲ ╱'],
[' │', '│ │ │ ┃ ┃ ┃ ║ ║ ║ │ ┃ ┃ ╲ ╱'],
[' │', '├─┼─┤ ┣━╋━┫ ╠═╬═╣ ├─╄━┩ ╳'],
[' │', '│ │ │ ┃ ┃ ┃ ║ ║ ║ │ │ │ ╱ ╲'],
[' └', '└─┴─┘ ┗━┻━┛ ╚═╩═╝ └─┴─┘ ╱ ╲'],
['Block elem ─', '░▒▓█ ▁▂▃▄▅▆▇█ ▏▎▍▌▋▊▉'],
['Emoji ─', '😉 👋'],
['16 color ─', [..._1to8.map(e => `\x1b[3${e - 1}m●`), ..._1to8.map(e => `\x1b[1;3${e - 1}m●`)].join('')],
['256 color ┬', [..._0to35.map(e => `\x1b[38;5;${16 + 36 * 0 + e}m●`)].join('')],
[' │', [..._0to35.map(e => `\x1b[38;5;${16 + 36 * 1 + e}m●`)].join('')],
[' │', [..._0to35.map(e => `\x1b[38;5;${16 + 36 * 2 + e}m●`)].join('')],
[' │', [..._0to35.map(e => `\x1b[38;5;${16 + 36 * 3 + e}m●`)].join('')],
[' │', [..._0to35.map(e => `\x1b[38;5;${16 + 36 * 4 + e}m●`)].join('')],
[' │', [..._0to35.map(e => `\x1b[38;5;${16 + 36 * 5 + e}m●`)].join('')],
[' └', [..._1to24.map(e => `\x1b[38;5;${232 + e - 1}m●`)].join('')],
['True color ┬', [..._1to64.map(e => `\x1b[38;2;${64 * 0 + e - 1};0;0m●`)].join('')],
[' │', [..._1to64.map(e => `\x1b[38;2;${64 * 1 + e - 1};0;0m●`)].join('')],
[' │', [..._1to64.map(e => `\x1b[38;2;${64 * 2 + e - 1};0;0m●`)].join('')],
[' └', [..._1to64.map(e => `\x1b[38;2;${64 * 3 + e - 1};0;0m●`)].join('')],
['Styles ─', ['\x1b[1mBold', '\x1b[2mFaint', '\x1b[3mItalics', '\x1b[7mInverse', '\x1b[9mStrikethrough', '\x1b[8mInvisible'].join('\x1b[0m, ')],
['Underlines ─', ['\x1b[4:1mStraight', '\x1b[4:2mDouble', '\x1b[4:3mCurly', '\x1b[4:4mDotted', '\x1b[4:5mDashed'].join('\x1b[0m, ')],
];
const maxLength = lines.reduce((p, c) => Math.max(p, c[0].length), 0);
term.write('\r\n');
term.writeln(lines.map(e => `${e[0].padStart(maxLength)} ${e[1]}\x1b[0m`).join('\r\n'));
term.prompt();
},
description: 'Prints a wide range of characters and styles that xterm.js can handle'
}
};
function runCommand(term, text) {
const command = text.trim().split(' ')[0];
if (command.length > 0) {
term.writeln('');
if (command in commands) {
commands[command].f();
return;
}
term.writeln(`${command}: command not found`);
}
prompt(term);
}
runFakeTerminal();
});
function addDecoration(term) {
const marker = term.registerMarker(15);
const decoration = term.registerDecoration({ marker, x: 44 });
decoration.onRender(element => {
element.classList.add('link-hint-decoration');
element.innerText = 'Try clicking italic text';
// must be inlined to override inlined width/height coming from xterm
element.style.height = '';
element.style.width = '';
});
}