summaryrefslogtreecommitdiff
path: root/xP/public/xP.js
blob: 19a769a46c06789e5cd005d694e3f3f8e70ea73c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
// 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}
		})
	}
}

// ---- Event processing -------------------------------------------------------

let rpc = new RelayRpc(proxy)

let buffers = new Map()
let bufferCurrent = undefined
let connecting = true
rpc.connect().then(result => {
	buffers.clear()
	bufferCurrent = undefined
	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) {
		b = {lines: []}
		buffers.set(e.bufferName, b)
	}
	// TODO: Update any buffer properties.
})

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 e = event.detail, b = buffers.get(e.bufferName)
	let old = buffers.get(bufferCurrent)
	bufferCurrent = e.bufferName

	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)
	if (b === undefined)
		return
	b.lines.push({when: e.when, rendition: e.rendition, items: e.items})
})

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}`
}

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.backgroundColor = palette[bg]
	if (style)
		return style
}

// ---- UI ---------------------------------------------------------------------

let BufferList = {
	view: vnode => {
		let items = []
		buffers.forEach((b, name) => {
			let attrs = {
				onclick: event => {
					rpc.send({command: 'BufferActivate', bufferName: name})
				},
			}
			if (name == bufferCurrent)
				attrs.class = 'active'
			items.push(m('.item', attrs, name))
		})
		return m('.list', {}, items)
	},
}

function linkify(text, attrs, a) {
	let re = new RegExp([
		/https?:\/\//,
		/([^\[\](){}<>"'\s]|\([^\[\](){}<>"'\s]*\))+/,
		/[^\[\](){}<>"'\s,.:]/,
	].map(r => r.source).join(''), 'g')

	let 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)))
}

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':
				linkify(item.text, {
					class: Array.from(classes.keys()).join(' '),
					style: applyColor(fg, bg, inverse),
				}, content)
				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 = {
	oncreate: vnode => {
		if (vnode.dom === undefined)
			return

		let el = vnode.dom.children[1]
		if (el !== null)
			el.scrollTop = el.scrollHeight
	},

	onupdate: vnode => {
		Buffer.oncreate(vnode)
	},

	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)
			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),
		])
	},
}

function onKeyDown(event) {
	// TODO: And perhaps on other actions, too.
	rpc.send({command: 'Active'})

	// TODO: Cancel any current autocomplete.

	let textarea = event.currentTarget
	switch (event.keyCode) {
	case 9:
		if (textarea.selectionStart !== textarea.selectionEnd)
			return
		rpc.send({
			command: 'BufferComplete',
			bufferName: bufferCurrent,
			text: textarea.value,
			position: textarea.selectionEnd,
		}).then(response => {
			// TODO: Somehow display remaining options, or cycle through.
			if (response.completions.length)
				textarea.setRangeText(response.completions[0],
					response.start, textarea.selectionEnd, 'end')
			if (response.completions.length === 1)
				textarea.setRangeText(' ',
					textarea.selectionStart, textarea.selectionEnd, 'end')
		})
		break;
	case 13:
		rpc.send({
			command: 'BufferInput',
			bufferName: bufferCurrent,
			text: textarea.value,
		})
		textarea.value = ''
		break;
	default:
		return
	}

	event.preventDefault()
}

let Input = {
	view: vnode => {
		return m('textarea#input', {
			rows: 1,
			onkeydown: 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('.middle', {}, [m(BufferList), m(Buffer)]),
			m('.status', {}, bufferCurrent),
			m(Input),
		])
	},
}

window.addEventListener('load', () => m.mount(document.body, Main))