883 lines
20 KiB
JavaScript
883 lines
20 KiB
JavaScript
// Copyright (c) 2022, Přemysl Eric Janouch <p@janouch.name>
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// SPDX-License-Identifier: 0BSD
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'use strict'
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// ---- RPC --------------------------------------------------------------------
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class RelayRpc extends EventTarget {
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constructor(url) {
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super()
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this.url = url
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this.commandSeq = 0
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}
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connect() {
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// We can't close the connection immediately, as that queues a task.
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if (this.ws !== undefined)
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throw "Already connecting or connected"
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return new Promise((resolve, reject) => {
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let ws = this.ws = new WebSocket(this.url)
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ws.onopen = event => {
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this._initialize()
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resolve()
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}
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// It's going to be code 1006 with no further info.
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ws.onclose = event => {
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this.ws = undefined
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reject()
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}
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})
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}
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_initialize() {
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this.ws.onopen = undefined
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this.ws.onmessage = event => {
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this._process(event.data)
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}
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this.ws.onerror = event => {
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this.dispatchEvent(new CustomEvent('error'))
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}
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this.ws.onclose = event => {
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let message = "Connection closed: " +
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event.code + " (" + event.reason + ")"
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for (const seq in this.promised)
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this.promised[seq].reject(message)
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this.ws = undefined
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this.dispatchEvent(new CustomEvent('close', {
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detail: {message, code: event.code, reason: event.reason},
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}))
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// Now connect() can be called again.
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}
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this.promised = {}
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}
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_process(data) {
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if (typeof data !== 'string')
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throw "Binary messages not supported"
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let message = JSON.parse(data)
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if (typeof message !== 'object')
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throw "Invalid message"
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let e = message.data
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if (typeof e !== 'object')
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throw "Invalid message"
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switch (e.event) {
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case 'Error':
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if (this.promised[e.commandSeq] !== undefined)
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this.promised[e.commandSeq].reject(e.error)
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else
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console.error("Unawaited error")
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break
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case 'Response':
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if (this.promised[e.commandSeq] !== undefined)
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this.promised[e.commandSeq].resolve(e.data)
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else
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console.error("Unawaited response")
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break
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default:
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if (typeof e.event !== 'string')
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throw "Invalid event tag"
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e.eventSeq = message.eventSeq
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this.dispatchEvent(new CustomEvent(e.event, {detail: e}))
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// Minor abstraction layering violation.
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m.redraw()
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return
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}
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delete this.promised[e.commandSeq]
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for (const seq in this.promised) {
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// We don't particularly care about wraparound issues.
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if (seq >= e.commandSeq)
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continue
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this.promised[seq].reject("No response")
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delete this.promised[seq]
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}
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}
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send(params) {
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if (this.ws === undefined)
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throw "Not connected"
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if (typeof params !== 'object')
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throw "Method parameters must be an object"
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// Left shifts in Javascript convert to a 32-bit signed number.
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let seq = ++this.commandSeq
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if ((seq << 0) != seq)
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seq = this.commandSeq = 0
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this.ws.send(JSON.stringify({commandSeq: seq, data: params}))
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return new Promise((resolve, reject) => {
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this.promised[seq] = {resolve, reject}
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})
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}
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base64decode(str) {
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return decodeURIComponent(atob(str).split('').map(c =>
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'%' + ('00' + c.charCodeAt(0).toString(16)).slice(-2)).join(''))
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}
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}
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// ---- Utilities --------------------------------------------------------------
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function utf8Encode(s) { return new TextEncoder().encode(s) }
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function utf8Decode(s) { return new TextDecoder().decode(s) }
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function hasShortcutModifiers(event) {
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return (event.altKey || event.escapePrefix) &&
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!event.metaKey && !event.ctrlKey
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}
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const audioContext = new AudioContext()
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function beep() {
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let gain = audioContext.createGain()
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gain.gain.value = 0.5
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gain.connect(audioContext.destination)
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let oscillator = audioContext.createOscillator()
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oscillator.type = "triangle"
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oscillator.frequency.value = 800
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oscillator.connect(gain)
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oscillator.start(audioContext.currentTime)
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oscillator.stop(audioContext.currentTime + 0.1)
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}
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let iconLink = undefined
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let iconState = undefined
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function updateIcon(highlighted) {
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if (iconState === highlighted)
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return
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iconState = highlighted
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let canvas = document.createElement('canvas')
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canvas.width = 32
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canvas.height = 32
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let ctx = canvas.getContext('2d')
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ctx.arc(16, 16, 12, 0, 2 * Math.PI)
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ctx.fillStyle = '#000'
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if (highlighted === true)
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ctx.fillStyle = '#ff5f00'
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if (highlighted === false)
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ctx.fillStyle = '#ccc'
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ctx.fill()
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if (iconLink === undefined) {
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iconLink = document.createElement('link')
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iconLink.type = 'image/png'
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iconLink.rel = 'icon'
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document.getElementsByTagName('head')[0].appendChild(iconLink)
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}
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iconLink.href = canvas.toDataURL();
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}
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// ---- Event processing -------------------------------------------------------
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let rpc = new RelayRpc(proxy)
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let buffers = new Map()
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let bufferLast = undefined
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let bufferCurrent = undefined
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let bufferLog = undefined
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let bufferAutoscroll = true
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let servers = new Map()
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function bufferResetStats(b) {
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b.newMessages = 0
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b.newUnimportantMessages = 0
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b.highlighted = false
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}
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function bufferActivate(name) {
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rpc.send({command: 'BufferActivate', bufferName: name})
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}
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function bufferToggleLog() {
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if (bufferLog) {
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setTimeout(() =>
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document.getElementById('input')?.focus())
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bufferLog = undefined
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m.redraw()
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return
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}
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let name = bufferCurrent
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rpc.send({
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command: 'BufferLog',
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bufferName: name,
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}).then(resp => {
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if (bufferCurrent !== name)
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return
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bufferLog = rpc.base64decode(resp.log)
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m.redraw()
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})
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}
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let connecting = true
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rpc.connect().then(result => {
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buffers.clear()
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bufferLast = undefined
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bufferCurrent = undefined
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bufferLog = undefined
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bufferAutoscroll = true
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servers.clear()
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rpc.send({command: 'Hello', version: 1})
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connecting = false
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m.redraw()
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}).catch(error => {
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connecting = false
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m.redraw()
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})
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rpc.addEventListener('close', event => {
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m.redraw()
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})
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rpc.addEventListener('Ping', event => {
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rpc.send({command: 'PingResponse', eventSeq: event.detail.eventSeq})
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})
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// ~~~ Buffer events ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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rpc.addEventListener('BufferUpdate', event => {
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let e = event.detail, b = buffers.get(e.bufferName)
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if (b === undefined) {
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buffers.set(e.bufferName, (b = {
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lines: [],
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history: [],
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historyAt: 0,
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}))
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bufferResetStats(b)
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}
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b.hideUnimportant = e.hideUnimportant
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b.kind = e.context.kind
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b.server = servers.get(e.context.serverName)
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})
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rpc.addEventListener('BufferStats', event => {
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let e = event.detail, b = buffers.get(e.bufferName)
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if (b === undefined)
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return
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b.newMessages = e.newMessages,
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b.newUnimportantMessages = e.newUnimportantMessages
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b.highlighted = e.highlighted
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})
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rpc.addEventListener('BufferRename', event => {
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let e = event.detail
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buffers.set(e.new, buffers.get(e.bufferName))
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buffers.delete(e.bufferName)
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})
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rpc.addEventListener('BufferRemove', event => {
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let e = event.detail
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buffers.delete(e.bufferName)
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if (e.bufferName === bufferLast)
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bufferLast = undefined
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})
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rpc.addEventListener('BufferActivate', event => {
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let old = buffers.get(bufferCurrent)
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if (old !== undefined)
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bufferResetStats(old)
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bufferLast = bufferCurrent
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let e = event.detail, b = buffers.get(e.bufferName)
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bufferCurrent = e.bufferName
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bufferLog = undefined
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bufferAutoscroll = true
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if (b !== undefined && document.visibilityState !== 'hidden')
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b.highlighted = false
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let textarea = document.getElementById('input')
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if (textarea === null)
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return
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textarea.focus()
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if (old !== undefined) {
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old.input = textarea.value
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old.inputStart = textarea.selectionStart
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old.inputEnd = textarea.selectionEnd
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old.inputDirection = textarea.selectionDirection
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// Note that we effectively overwrite the newest line
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// with the current textarea contents, and jump there.
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old.historyAt = old.history.length
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}
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textarea.value = ''
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if (b !== undefined && b.input !== undefined) {
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textarea.value = b.input
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textarea.setSelectionRange(b.inputStart, b.inputEnd, b.inputDirection)
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}
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})
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rpc.addEventListener('BufferLine', event => {
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let e = event.detail, b = buffers.get(e.bufferName), line = {...e}
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delete line.event
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delete line.leakToActive
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if (b === undefined)
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return
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// Initial sync: skip all other processing, let highlights be.
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if (bufferCurrent === undefined) {
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b.lines.push(line)
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return
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}
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let visible = document.visibilityState !== 'hidden' &&
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bufferLog === undefined &&
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(e.bufferName == bufferCurrent || e.leakToActive)
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b.lines.push({...line})
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if (!(visible || e.leakToActive) ||
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b.newMessages || b.newUnimportantMessages) {
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if (line.isUnimportant)
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b.newUnimportantMessages++
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else
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b.newMessages++
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}
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if (e.leakToActive) {
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let bc = buffers.get(bufferCurrent)
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bc.lines.push({...line, leaked: true})
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if (!visible || bc.newMessages || bc.newUnimportantMessages) {
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if (line.isUnimportant)
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bc.newUnimportantMessages++
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else
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bc.newMessages++
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}
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}
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if (line.isHighlight ||
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(!visible && b.kind === 'PrivateMessage' && !line.isUnimportant)) {
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beep()
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if (!visible)
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b.highlighted = true
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}
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})
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rpc.addEventListener('BufferClear', event => {
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let e = event.detail, b = buffers.get(e.bufferName)
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if (b !== undefined)
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b.lines.length = 0
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})
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// ~~~ Server events ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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rpc.addEventListener('ServerUpdate', event => {
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let e = event.detail, s = servers.get(e.serverName)
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if (s === undefined)
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servers.set(e.serverName, (s = {}))
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s.state = e.state
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})
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rpc.addEventListener('ServerRename', event => {
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let e = event.detail
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servers.set(e.new, servers.get(e.serverName))
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servers.delete(e.serverName)
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})
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rpc.addEventListener('ServerRemove', event => {
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let e = event.detail
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servers.delete(e.serverName)
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})
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// --- Colours -----------------------------------------------------------------
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let palette = [
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'#000', '#800', '#080', '#880', '#008', '#808', '#088', '#ccc',
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'#888', '#f00', '#0f0', '#ff0', '#00f', '#f0f', '#0ff', '#fff',
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]
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palette.length = 256
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for (let i = 0; i < 216; i++) {
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let r = i / 36 >> 0, g = (i / 6 >> 0) % 6, b = i % 6
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r = !r ? '00' : (55 + 40 * r).toString(16)
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g = !g ? '00' : (55 + 40 * g).toString(16)
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b = !b ? '00' : (55 + 40 * b).toString(16)
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palette[16 + i] = `#${r}${g}${b}`
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}
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for (let i = 0; i < 24; i++) {
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let g = ('0' + (8 + i * 10).toString(16)).slice(-2)
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palette[232 + i] = `#${g}${g}${g}`
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}
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// ---- UI ---------------------------------------------------------------------
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let linkRE = [
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/https?:\/\//,
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/([^\[\](){}<>"'\s]|\([^\[\](){}<>"'\s]*\))+/,
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/[^\[\](){}<>"'\s,.:]/,
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].map(r => r.source).join('')
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let Toolbar = {
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toggleAutoscroll: () => {
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bufferAutoscroll = !bufferAutoscroll
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},
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view: vnode => {
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return m('.toolbar', {}, [
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m('button', {onclick: Toolbar.toggleAutoscroll},
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bufferAutoscroll ? 'Scroll lock' : 'Scroll unlock'),
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m('button', {onclick: event => bufferToggleLog()},
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bufferLog === undefined ? 'Show log' : 'Hide log'),
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])
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},
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}
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let BufferList = {
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view: vnode => {
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let highlighted = false
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let items = Array.from(buffers, ([name, b]) => {
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let classes = [], displayName = name
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if (name == bufferCurrent) {
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classes.push('current')
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} else if (b.newMessages) {
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classes.push('activity')
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displayName += ` (${b.newMessages})`
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}
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if (b.highlighted) {
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classes.push('highlighted')
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highlighted = true
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}
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return m('.item', {
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onclick: event => bufferActivate(name),
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class: classes.join(' '),
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}, displayName)
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})
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updateIcon(rpc.ws === undefined ? null : highlighted)
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return m('.list', {}, items)
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},
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}
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let Content = {
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applyColor: (fg, bg, inverse) => {
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if (inverse)
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[fg, bg] = [bg >= 0 ? bg : 15, fg >= 0 ? fg : 0]
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let style = {}
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if (fg >= 0)
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style.color = palette[fg]
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if (bg >= 0)
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style.backgroundColor = palette[bg]
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if (style)
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return style
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},
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linkify: (text, attrs) => {
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let re = new RegExp(linkRE, 'g'), a = [], end = 0, match
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while ((match = re.exec(text)) !== null) {
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if (end < match.index)
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a.push(m('span', attrs, text.substring(end, match.index)))
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a.push(m('a[target=_blank]', {href: match[0], ...attrs}, match[0]))
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end = re.lastIndex
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}
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if (end < text.length)
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a.push(m('span', attrs, text.substring(end)))
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return a
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},
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view: vnode => {
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let line = vnode.children[0]
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let mark = undefined
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switch (line.rendition) {
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case 'Indent': mark = m('span.mark', {}, ''); break
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case 'Status': mark = m('span.mark', {}, '–'); break
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case 'Error': mark = m('span.mark.error', {}, '⚠'); break
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case 'Join': mark = m('span.mark.join', {}, '→'); break
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case 'Part': mark = m('span.mark.part', {}, '←'); break
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case 'Action': mark = m('span.mark.action', {}, '✶'); break
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}
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let classes = new Set()
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let flip = c => {
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if (classes.has(c))
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classes.delete(c)
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else
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classes.add(c)
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}
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let fg = -1, bg = -1, inverse = false
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return m('.content', vnode.attrs, [mark, line.items.flatMap(item => {
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switch (item.kind) {
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case 'Text':
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return Content.linkify(item.text, {
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class: Array.from(classes.keys()).join(' '),
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style: Content.applyColor(fg, bg, inverse),
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})
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case 'Reset':
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classes.clear()
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fg = bg = -1
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inverse = false
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break
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case 'FgColor':
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fg = item.color
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break
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case 'BgColor':
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bg = item.color
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break
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case 'FlipInverse':
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inverse = !inverse
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break
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case 'FlipBold':
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flip('b')
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break
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case 'FlipItalic':
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flip('i')
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break
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case 'FlipUnderline':
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flip('u')
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break
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case 'FlipCrossedOut':
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flip('s')
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break
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case 'FlipMonospace':
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flip('m')
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break
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}
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})])
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},
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}
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let Buffer = {
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controller: new AbortController(),
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onbeforeremove: vnode => {
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Buffer.controller.abort()
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},
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onupdate: vnode => {
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if (bufferAutoscroll)
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vnode.dom.scrollTop = vnode.dom.scrollHeight
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},
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oncreate: vnode => {
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Buffer.onupdate(vnode)
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window.addEventListener('resize', event => Buffer.onupdate(vnode),
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{signal: Buffer.controller.signal})
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},
|
||
|
||
view: vnode => {
|
||
let lines = []
|
||
let b = buffers.get(bufferCurrent)
|
||
if (b === undefined)
|
||
return m('.buffer')
|
||
|
||
let lastDateMark = undefined
|
||
let squashing = false
|
||
let markBefore = b.lines.length
|
||
- b.newMessages - b.newUnimportantMessages
|
||
b.lines.forEach((line, i) => {
|
||
if (i == markBefore)
|
||
lines.push(m('.unread'))
|
||
|
||
if (!line.isUnimportant || !b.hideUnimportant) {
|
||
squashing = false
|
||
} else if (squashing) {
|
||
return
|
||
} else {
|
||
squashing = true
|
||
}
|
||
|
||
let date = new Date(line.when)
|
||
let dateMark = date.toLocaleDateString()
|
||
if (dateMark !== lastDateMark) {
|
||
lines.push(m('.date', {}, dateMark))
|
||
lastDateMark = dateMark
|
||
}
|
||
if (squashing) {
|
||
lines.push(m('.time.hidden'))
|
||
lines.push(m('.content'))
|
||
return
|
||
}
|
||
|
||
let attrs = {}
|
||
if (line.leaked)
|
||
attrs.class = 'leaked'
|
||
|
||
lines.push(m('.time', {...attrs}, date.toLocaleTimeString()))
|
||
lines.push(m(Content, {...attrs}, line))
|
||
})
|
||
|
||
let dateMark = new Date().toLocaleDateString()
|
||
if (dateMark !== lastDateMark && lastDateMark !== undefined)
|
||
lines.push(m('.date', {}, dateMark))
|
||
return m('.buffer', {}, lines)
|
||
},
|
||
}
|
||
|
||
let Log = {
|
||
oncreate: vnode => {
|
||
vnode.dom.scrollTop = vnode.dom.scrollHeight
|
||
vnode.dom.focus()
|
||
},
|
||
|
||
linkify: text => {
|
||
let re = new RegExp(linkRE, 'g'), a = [], end = 0, match
|
||
while ((match = re.exec(text)) !== null) {
|
||
if (end < match.index)
|
||
a.push(text.substring(end, match.index))
|
||
a.push(m('a[target=_blank]', {href: match[0]}, match[0]))
|
||
end = re.lastIndex
|
||
}
|
||
if (end < text.length)
|
||
a.push(text.substring(end))
|
||
return a
|
||
},
|
||
|
||
view: vnode => {
|
||
return m(".log", {}, Log.linkify(bufferLog))
|
||
},
|
||
}
|
||
|
||
let BufferContainer = {
|
||
view: vnode => {
|
||
return m('.buffer-container', {}, [
|
||
m('.filler'),
|
||
bufferLog !== undefined ? m(Log) : m(Buffer),
|
||
])
|
||
},
|
||
}
|
||
|
||
let Status = {
|
||
view: vnode => {
|
||
let b = buffers.get(bufferCurrent)
|
||
if (b === undefined)
|
||
return m('.status', {}, 'Synchronizing...')
|
||
|
||
let status = `${bufferCurrent}`
|
||
if (b.hideUnimportant)
|
||
status += `<H>`
|
||
if (b.server !== undefined)
|
||
status += ` (${b.server.state})`
|
||
return m('.status', {}, status)
|
||
},
|
||
}
|
||
|
||
let Input = {
|
||
counter: 0,
|
||
stamp: textarea => {
|
||
return [Input.counter,
|
||
textarea.selectionStart, textarea.selectionEnd, textarea.value]
|
||
},
|
||
|
||
complete: textarea => {
|
||
if (textarea.selectionStart !== textarea.selectionEnd)
|
||
return false
|
||
|
||
// Cancel any previous autocomplete, and ensure applicability.
|
||
Input.counter++
|
||
let state = Input.stamp(textarea)
|
||
rpc.send({
|
||
command: 'BufferComplete',
|
||
bufferName: bufferCurrent,
|
||
text: textarea.value,
|
||
position: utf8Encode(
|
||
textarea.value.slice(0, textarea.selectionEnd)).length,
|
||
}).then(resp => {
|
||
if (!Input.stamp(textarea).every((v, k) => v === state[k]))
|
||
return
|
||
|
||
let preceding = utf8Encode(textarea.value).slice(0, resp.start)
|
||
let start = utf8Decode(preceding).length
|
||
|
||
// TODO: Somehow display remaining options, or cycle through.
|
||
if (resp.completions.length) {
|
||
textarea.setRangeText(resp.completions[0],
|
||
start, textarea.selectionEnd, 'end')
|
||
} else {
|
||
beep()
|
||
}
|
||
if (resp.completions.length === 1)
|
||
textarea.setRangeText(' ',
|
||
textarea.selectionStart, textarea.selectionEnd, 'end')
|
||
})
|
||
return true
|
||
},
|
||
|
||
submit: textarea => {
|
||
rpc.send({
|
||
command: 'BufferInput',
|
||
bufferName: bufferCurrent,
|
||
text: textarea.value,
|
||
})
|
||
|
||
// b.history[b.history.length] is virtual, and is represented
|
||
// either by textarea contents when it's currently being edited,
|
||
// or by b.input in all other cases.
|
||
let b = buffers.get(bufferCurrent)
|
||
b.history.push(textarea.value)
|
||
b.historyAt = b.history.length
|
||
textarea.value = ''
|
||
return true
|
||
},
|
||
|
||
previous: textarea => {
|
||
let b = buffers.get(bufferCurrent)
|
||
if (b === undefined)
|
||
return false
|
||
|
||
if (b.historyAt > 0) {
|
||
if (b.historyAt == b.history.length)
|
||
b.input = textarea.value
|
||
textarea.value = b.history[--b.historyAt]
|
||
} else {
|
||
beep()
|
||
}
|
||
return true
|
||
},
|
||
|
||
next: textarea => {
|
||
let b = buffers.get(bufferCurrent)
|
||
if (b === undefined)
|
||
return false
|
||
|
||
if (b.historyAt < b.history.length) {
|
||
if (++b.historyAt == b.history.length)
|
||
textarea.value = b.input
|
||
else
|
||
textarea.value = b.history[b.historyAt]
|
||
} else {
|
||
beep()
|
||
}
|
||
return true
|
||
},
|
||
|
||
onKeyDown: event => {
|
||
// TODO: And perhaps on other actions, too.
|
||
rpc.send({command: 'Active'})
|
||
|
||
let textarea = event.currentTarget
|
||
let handled = false
|
||
if (hasShortcutModifiers(event)) {
|
||
switch (event.key) {
|
||
case 'p':
|
||
handled = Input.previous(textarea)
|
||
break
|
||
case 'n':
|
||
handled = Input.next(textarea)
|
||
break
|
||
}
|
||
} else if (!event.altKey && !event.ctrlKey && !event.metaKey &&
|
||
!event.shiftKey) {
|
||
switch (event.keyCode) {
|
||
case 9:
|
||
handled = Input.complete(textarea)
|
||
break
|
||
case 13:
|
||
handled = Input.submit(textarea)
|
||
break
|
||
}
|
||
}
|
||
if (handled)
|
||
event.preventDefault()
|
||
},
|
||
|
||
view: vnode => {
|
||
return m('textarea#input', {rows: 1, onkeydown: Input.onKeyDown})
|
||
},
|
||
}
|
||
|
||
let Main = {
|
||
view: vnode => {
|
||
let state = "Connected"
|
||
if (connecting)
|
||
state = "Connecting..."
|
||
else if (rpc.ws === undefined)
|
||
state = "Disconnected"
|
||
|
||
return m('.xP', {}, [
|
||
m('.title', {}, [`xP (${state})`, m(Toolbar)]),
|
||
m('.middle', {}, [m(BufferList), m(BufferContainer)]),
|
||
m(Status),
|
||
m(Input),
|
||
])
|
||
},
|
||
}
|
||
|
||
window.addEventListener('load', () => m.mount(document.body, Main))
|
||
|
||
document.addEventListener('visibilitychange', event => {
|
||
let b = buffers.get(bufferCurrent)
|
||
if (b !== undefined && document.visibilityState !== 'hidden') {
|
||
b.highlighted = false
|
||
m.redraw()
|
||
}
|
||
})
|
||
|
||
// On macOS, the Alt/Option key transforms characters, which basically breaks
|
||
// all event.altKey shortcuts, so implement Escape prefixing on that system.
|
||
// This method of detection only works with Blink browsers, as of writing.
|
||
let lastWasEscape = false
|
||
document.addEventListener('keydown', event => {
|
||
event.escapePrefix = lastWasEscape
|
||
if (lastWasEscape) {
|
||
lastWasEscape = false
|
||
} else if (event.code == 'Escape' &&
|
||
navigator.userAgentData?.platform === 'macOS') {
|
||
event.preventDefault()
|
||
event.stopPropagation()
|
||
lastWasEscape = true
|
||
return
|
||
}
|
||
|
||
if (rpc.ws == undefined || !hasShortcutModifiers(event))
|
||
return
|
||
|
||
// Rotate names so that the current buffer comes first.
|
||
let names = [...buffers.keys()]
|
||
names.push.apply(names,
|
||
names.splice(0, names.findIndex(name => name == bufferCurrent)))
|
||
|
||
switch (event.key) {
|
||
case 'h':
|
||
bufferToggleLog()
|
||
break
|
||
case 'a':
|
||
for (const name of names.slice(1))
|
||
if (buffers.get(name).newMessages) {
|
||
bufferActivate(name)
|
||
break
|
||
}
|
||
break
|
||
case '!':
|
||
for (const name of names.slice(1))
|
||
if (buffers.get(name).highlighted) {
|
||
bufferActivate(name)
|
||
break
|
||
}
|
||
break
|
||
case 'Tab':
|
||
if (bufferLast !== undefined)
|
||
bufferActivate(bufferLast)
|
||
break
|
||
case 'PageUp':
|
||
if (names.length > 1)
|
||
bufferActivate(names.at(-1))
|
||
break
|
||
case 'PageDown':
|
||
if (names.length > 1)
|
||
bufferActivate(names.at(+1))
|
||
break
|
||
default:
|
||
return
|
||
}
|
||
|
||
event.preventDefault()
|
||
}, true)
|