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// Copyright (c) 2022, Přemysl Eric Janouch <p@janouch.name>
// SPDX-License-Identifier: 0BSD
// --- 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}`
}
function 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 += `background-color: ${palette[bg]};`
if (style)
return style
}
// ---- Event processing -------------------------------------------------------
// TODO: Probably reset state on disconnect, and indicate to user.
let socket = new WebSocket(proxy)
let commandSeq = 0
function send(command) {
socket.send(JSON.stringify({commandSeq: ++commandSeq, data: command}))
}
socket.onopen = function(event) {
send({command: 'Hello', version: 1})
}
let buffers = new Map()
let bufferCurrent = undefined
socket.onmessage = function(event) {
console.log(event.data)
let e = JSON.parse(event.data).data
switch (e.event) {
case 'BufferUpdate':
{
let b = buffers.get(e.bufferName)
if (b === undefined) {
b = {lines: []}
buffers.set(e.bufferName, b)
}
// TODO: Update any buffer properties.
break
}
case 'BufferRename':
buffers.set(e.new, buffers.get(e.bufferName))
buffers.delete(e.bufferName)
break
case 'BufferRemove':
buffers.delete(e.bufferName)
break
case 'BufferActivate':
bufferCurrent = e.bufferName
// TODO: Somehow scroll to the end of it immediately.
// TODO: Focus the textarea.
break
case 'BufferLine':
{
let b = buffers.get(e.bufferName)
if (b !== undefined)
b.lines.push({when: e.when, rendition: e.rendition, items: e.items})
break
}
case 'BufferClear':
{
let b = buffers.get(e.bufferName)
if (b !== undefined)
b.lines.length = 0
break
}
}
m.redraw()
}
// ---- UI ---------------------------------------------------------------------
let BufferList = {
view: vnode => {
let items = []
buffers.forEach((b, name) => {
let attrs = {
onclick: e => {
send({command: 'BufferActivate', bufferName: name})
},
}
if (name == bufferCurrent)
attrs.class = 'active'
items.push(m('.item', attrs, name))
})
return m('.list', {}, items)
},
}
let Content = {
view: vnode => {
let line = vnode.children[0]
let content = []
switch (line.rendition) {
case 'Indent': content.push(m('span.mark', {}, '')); break
case 'Status': content.push(m('span.mark', {}, '–')); break
case 'Error': content.push(m('span.mark.error', {}, '⚠')); break
case 'Join': content.push(m('span.mark.join', {}, '→')); break
case 'Part': content.push(m('span.mark.part', {}, '←')); break
case 'Action': content.push(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
line.items.forEach(item => {
switch (item.kind) {
case 'Text':
// TODO: Detect and transform links.
content.push(m('span', {
class: Array.from(classes.keys()).join(' '),
style: applyColor(fg, bg, inverse),
}, item.text))
break
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
}
})
return m('.content', {}, content)
},
}
let Buffer = {
view: vnode => {
let lines = []
let b = buffers.get(bufferCurrent)
if (b === undefined)
return
let lastDateMark = undefined
b.lines.forEach(line => {
let date = new Date(line.when * 1000)
let dateMark = date.toLocaleDateString()
if (dateMark !== lastDateMark) {
lines.push(m('.date', {}, dateMark))
lastDateMark = dateMark
}
lines.push(m('.time', {}, date.toLocaleTimeString()))
lines.push(m(Content, {}, line))
})
return m('.buffer-container', {}, [
m('.filler'),
m('.buffer', {}, lines),
])
},
}
// TODO: This should be remembered across buffer switches,
// and we'll probably have to intercept /all/ key presses.
let Input = {
view: vnode => {
return m('textarea', {
rows: 1,
onkeydown: e => {
// TODO: And perhaps on other actions, too.
send({command: 'Active'})
if (e.keyCode !== 13)
return
send({
command: 'BufferInput',
bufferName: bufferCurrent,
text: e.currentTarget.value,
})
e.preventDefault()
e.currentTarget.value = ''
},
})
},
}
let Main = {
view: vnode => {
return m('.xP', {}, [
m('.title', {}, "xP"),
m('.middle', {}, [m(BufferList), m(Buffer)]),
m('.status', {}, bufferCurrent),
m(Input),
])
},
}
// TODO: Buffer names should work as routes.
window.addEventListener('load', () => {
m.route(document.body, '/', {
'/': Main,
})
})
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