xK/xP/public/xP.js

575 lines
13 KiB
JavaScript
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

// Copyright (c) 2022, Přemysl Eric Janouch <p@janouch.name>
// SPDX-License-Identifier: 0BSD
'use strict'
// ---- RPC --------------------------------------------------------------------
class RelayRpc extends EventTarget {
constructor(url) {
super()
this.url = url
this.commandSeq = 0
}
connect() {
// We can't close the connection immediately, as that queues a task.
if (this.ws !== undefined)
throw "Already connecting or connected"
return new Promise((resolve, reject) => {
let ws = this.ws = new WebSocket(this.url)
ws.onopen = event => {
this._initialize()
resolve()
}
// It's going to be code 1006 with no further info.
ws.onclose = event => {
this.ws = undefined
reject()
}
})
}
_initialize() {
this.ws.onopen = undefined
this.ws.onmessage = event => {
this._process(event.data)
}
this.ws.onerror = event => {
this.dispatchEvent(new CustomEvent('error'))
}
this.ws.onclose = event => {
let message = "Connection closed: " +
event.code + " (" + event.reason + ")"
for (const seq in this.promised)
this.promised[seq].reject(message)
this.ws = undefined
this.dispatchEvent(new CustomEvent('close', {
detail: {message, code: event.code, reason: event.reason},
}))
// Now connect() can be called again.
}
this.promised = {}
}
_process(data) {
console.log(data)
if (typeof data !== 'string')
throw "Binary messages not supported"
let message = JSON.parse(data)
if (typeof message !== 'object')
throw "Invalid message"
let e = message.data
if (typeof e !== 'object')
throw "Invalid message"
switch (e.event) {
case 'Error':
if (this.promised[e.commandSeq] !== undefined)
this.promised[e.commandSeq].reject(e.error)
else
console.error("Unawaited error")
break
case 'Response':
if (this.promised[e.commandSeq] !== undefined)
this.promised[e.commandSeq].resolve(e.data)
else
console.error("Unawaited response")
break
default:
if (typeof e.event !== 'string')
throw "Invalid event tag"
this.dispatchEvent(new CustomEvent(e.event, {detail: e}))
// Minor abstraction layering violation.
m.redraw()
return
}
delete this.promised[e.commandSeq]
for (const seq in this.promised) {
// We don't particularly care about wraparound issues.
if (seq >= e.commandSeq)
continue
this.promised[seq].reject("No response")
delete this.promised[seq]
}
}
send(params) {
if (this.ws === undefined)
throw "Not connected"
if (typeof params !== 'object')
throw "Method parameters must be an object"
let seq = ++this.commandSeq
if (seq >= 1 << 32)
seq = this.commandSeq = 0
this.ws.send(JSON.stringify({commandSeq: seq, data: params}))
return new Promise((resolve, reject) => {
this.promised[seq] = {resolve, reject}
})
}
base64decode(str) {
return decodeURIComponent(atob(str).split('').map(c =>
'%' + ('00' + c.charCodeAt(0).toString(16)).slice(-2)).join(''))
}
}
// ---- Event processing -------------------------------------------------------
let rpc = new RelayRpc(proxy)
let buffers = new Map()
let bufferCurrent = undefined
let bufferLog = undefined
let bufferAutoscroll = true
let connecting = true
rpc.connect().then(result => {
buffers.clear()
bufferCurrent = undefined
bufferLog = undefined
bufferAutoscroll = true
rpc.send({command: 'Hello', version: 1})
connecting = false
m.redraw()
}).catch(error => {
connecting = false
m.redraw()
})
rpc.addEventListener('close', event => {
m.redraw()
})
rpc.addEventListener('BufferUpdate', event => {
let e = event.detail, b = buffers.get(e.bufferName)
if (b === undefined) {
buffers.set(e.bufferName, {
lines: [],
newMessages: e.newMessages,
newUnimportantMessages: e.newUnimportantMessages,
highlighted: e.highlighted,
})
}
})
rpc.addEventListener('BufferRename', event => {
let e = event.detail
buffers.set(e.new, buffers.get(e.bufferName))
buffers.delete(e.bufferName)
})
rpc.addEventListener('BufferRemove', event => {
let e = event.detail
buffers.delete(e.bufferName)
})
rpc.addEventListener('BufferActivate', event => {
let old = buffers.get(bufferCurrent)
if (old !== undefined) {
old.newMessages = 0
old.newUnimportantMessages = 0
old.highlighted = false
}
let e = event.detail, b = buffers.get(e.bufferName)
bufferCurrent = e.bufferName
bufferLog = undefined
bufferAutoscroll = true
let textarea = document.getElementById('input')
if (textarea === null)
return
textarea.focus()
if (old !== undefined)
old.input = textarea.value
if (b !== undefined)
textarea.value = b.input || ''
else
textarea.value = ''
})
rpc.addEventListener('BufferLine', event => {
let e = event.detail, b = buffers.get(e.bufferName), line = {...e}
delete line.event
delete line.leakToActive
if (b === undefined)
return
// Initial sync: skip all other processing, let highlights be.
if (bufferCurrent === undefined) {
b.lines.push(line)
return
}
let visible = e.bufferName == bufferCurrent || e.leakToActive
b.lines.push({...line})
if (!visible || b.newMessages || b.newUnimportantMessages) {
if (line.isUnimportant)
b.newUnimportantMessages++
else
b.newMessages++
}
if (e.leakToActive) {
let bc = buffers.get(bufferCurrent)
bc.lines.push({...line, leaked: true})
if (bc.newMessages || bc.newUnimportantMessages) {
if (line.isUnimportant)
bc.newUnimportantMessages++
else
bc.newMessages++
}
}
// TODO: Find some way of highlighting the tab in a browser.
// TODO: Also highlight on unseen private messages, like xC does.
if (!visible && line.isHighlight)
b.highlighted = true
})
rpc.addEventListener('BufferClear', event => {
let e = event.detail, b = buffers.get(e.bufferName)
if (b !== undefined)
b.lines.length = 0
})
// --- Colours -----------------------------------------------------------------
let palette = [
'#000', '#800', '#080', '#880', '#008', '#808', '#088', '#ccc',
'#888', '#f00', '#0f0', '#ff0', '#00f', '#f0f', '#0ff', '#fff',
]
palette.length = 256
for (let i = 0; i < 216; i++) {
let r = i / 36 >> 0, g = (i / 6 >> 0) % 6, b = i % 6
r = !r ? '00' : (55 + 40 * r).toString(16)
g = !g ? '00' : (55 + 40 * g).toString(16)
b = !b ? '00' : (55 + 40 * b).toString(16)
palette[16 + i] = `#${r}${g}${b}`
}
for (let i = 0; i < 24; i++) {
let g = ('0' + (8 + i * 10).toString(16)).slice(-2)
palette[232 + i] = `#${g}${g}${g}`
}
// ---- UI ---------------------------------------------------------------------
let Toolbar = {
toggleAutoscroll: () => {
bufferAutoscroll = !bufferAutoscroll
},
toggleLog: () => {
if (bufferLog) {
bufferLog = undefined
return
}
rpc.send({
command: 'BufferLog',
bufferName: bufferCurrent,
}).then(resp => {
bufferLog = rpc.base64decode(resp.log)
m.redraw()
})
},
view: vnode => {
return m('.toolbar', {}, [
m('button', {onclick: Toolbar.toggleAutoscroll},
bufferAutoscroll ? 'Scroll lock' : 'Scroll unlock'),
m('button', {onclick: Toolbar.toggleLog},
bufferLog === undefined ? 'Show log' : 'Hide log'),
])
},
}
let BufferList = {
activate: name => {
rpc.send({command: 'BufferActivate', bufferName: name})
},
view: vnode => {
let items = Array.from(buffers, ([name, b]) => {
let classes = [], displayName = name
if (name == bufferCurrent) {
classes.push('current')
} else {
if (b.highlighted)
classes.push('highlighted')
if (b.newMessages) {
classes.push('activity')
displayName += ` (${b.newMessages})`
}
}
return m('.item', {
onclick: event => BufferList.activate(name),
class: classes.join(' '),
}, displayName)
})
return m('.list', {}, items)
},
}
let Content = {
applyColor: (fg, bg, inverse) => {
if (inverse)
[fg, bg] = [bg >= 0 ? bg : 15, fg >= 0 ? fg : 0]
let style = {}
if (fg >= 0)
style.color = palette[fg]
if (bg >= 0)
style.backgroundColor = palette[bg]
if (style)
return style
},
linkify: (text, attrs) => {
let re = new RegExp([
/https?:\/\//,
/([^\[\](){}<>"'\s]|\([^\[\](){}<>"'\s]*\))+/,
/[^\[\](){}<>"'\s,.:]/,
].map(r => r.source).join(''), 'g')
let a = [], end = 0, match
while ((match = re.exec(text)) !== null) {
if (end < match.index)
a.push(m('span', attrs, text.substring(end, match.index)))
a.push(m('a', {href: match[0], ...attrs}, match[0]))
end = re.lastIndex
}
if (end < text.length)
a.push(m('span', attrs, text.substring(end)))
return a
},
view: vnode => {
let line = vnode.children[0]
let mark = undefined
switch (line.rendition) {
case 'Indent': mark = m('span.mark', {}, ''); break
case 'Status': mark = m('span.mark', {}, ''); break
case 'Error': mark = m('span.mark.error', {}, '⚠'); break
case 'Join': mark = m('span.mark.join', {}, '→'); break
case 'Part': mark = m('span.mark.part', {}, '←'); break
case 'Action': mark = m('span.mark.action', {}, '✶'); break
}
let classes = new Set()
let flip = c => {
if (classes.has(c))
classes.delete(c)
else
classes.add(c)
}
let fg = -1, bg = -1, inverse = false
return m('.content', vnode.attrs, [mark, line.items.flatMap(item => {
switch (item.kind) {
case 'Text':
return Content.linkify(item.text, {
class: Array.from(classes.keys()).join(' '),
style: Content.applyColor(fg, bg, inverse),
})
case 'Reset':
classes.clear()
fg = bg = -1
inverse = false
break
case 'FgColor':
fg = item.color
break
case 'BgColor':
bg = item.color
break
case 'FlipInverse':
inverse = !inverse
break
case 'FlipBold':
flip('b')
break
case 'FlipItalic':
flip('i')
break
case 'FlipUnderline':
flip('u')
break
case 'FlipCrossedOut':
flip('s')
break
case 'FlipMonospace':
flip('m')
break
}
})])
},
}
let Buffer = {
oncreate: vnode => {
if (vnode.dom !== undefined && bufferAutoscroll)
vnode.dom.scrollTop = vnode.dom.scrollHeight
},
onupdate: vnode => {
Buffer.oncreate(vnode)
},
view: vnode => {
let lines = []
let b = buffers.get(bufferCurrent)
if (b === undefined)
return
let lastDateMark = undefined
let markBefore = b.lines.length
- b.newMessages - b.newUnimportantMessages
b.lines.forEach((line, i) => {
let date = new Date(line.when)
let dateMark = date.toLocaleDateString()
if (dateMark !== lastDateMark) {
lines.push(m('.date', {}, dateMark))
lastDateMark = dateMark
}
if (i == markBefore)
lines.push(m('.unread'))
let attrs = {}
if (line.leaked)
attrs.class = 'leaked'
// TODO: Make use of isUnimportant.
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 => {
if (vnode.dom !== undefined)
vnode.dom.scrollTop = vnode.dom.scrollHeight
},
view: vnode => {
return m(".log", {}, bufferLog)
},
}
let BufferContainer = {
view: vnode => {
return m('.buffer-container', {}, [
m('.filler'),
bufferLog !== undefined ? m(Log) : m(Buffer),
])
},
}
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: textarea.selectionEnd,
}).then(resp => {
if (!Input.stamp(textarea).every((v, k) => v === state[k]))
return
// TODO: Somehow display remaining options, or cycle through.
if (resp.completions.length)
textarea.setRangeText(resp.completions[0],
resp.start, textarea.selectionEnd, 'end')
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,
})
textarea.value = ''
return true
},
onKeyDown: event => {
// TODO: And perhaps on other actions, too.
rpc.send({command: 'Active'})
let textarea = event.currentTarget
let handled = false
switch (event.keyCode) {
case 9:
if (!event.shiftKey)
handled = Input.complete(textarea)
break
case 13:
if (!event.shiftKey)
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', {}, bufferCurrent),
m(Input),
])
},
}
window.addEventListener('load', () => m.mount(document.body, Main))