-
-
Notifications
You must be signed in to change notification settings - Fork 477
/
comm_manager.ts
218 lines (195 loc) · 6.9 KB
/
comm_manager.ts
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
import type * as p from "@bokehjs/core/properties"
import {ModelChangedEvent} from "@bokehjs/document"
import {View} from "@bokehjs/core/view"
import {Model} from "@bokehjs/model"
import {Message} from "@bokehjs/protocol/message"
import {Receiver} from "@bokehjs/protocol/receiver"
import type {Patch, DocumentChangedEvent} from "@bokehjs/document"
import {isArray, isPlainObject} from "@bokehjs/core/util/types"
import {values, size} from "@bokehjs/core/util/object"
export const comm_settings: any = {
debounce: true,
}
export class CommManagerView extends View {
declare model: CommManager
}
export namespace CommManager {
export type Attrs = p.AttrsOf<Props>
export type Props = Model.Props & {
plot_id: p.Property<string | null>
comm_id: p.Property<string | null>
client_comm_id: p.Property<string | null>
timeout: p.Property<number>
debounce: p.Property<number>
}
}
export interface CommManager extends CommManager.Attrs {}
export class CommManager extends Model {
declare properties: CommManager.Props
declare __view_type__: CommManagerView
ns: any
_receiver: Receiver
_client_comm: any
_event_buffer: DocumentChangedEvent[]
_timeout: number
_blocked: boolean
constructor(attrs?: Partial<CommManager.Attrs>) {
super(attrs)
}
override initialize(): void {
super.initialize()
this._receiver = new Receiver()
this._event_buffer = []
this._blocked = false
this._timeout = Date.now()
if (((window as any).PyViz == undefined) || (!(window as any).PyViz.comm_manager)) {
console.log("Could not find comm manager on window.PyViz, ensure the extension is loaded.")
} else {
this.ns = (window as any).PyViz
this.ns.comm_manager.register_target(this.plot_id, this.comm_id, (msg: any) => {
for (const view of this.ns.shared_views.get(this.plot_id)) {
if (view !== this) {
view.msg_handler(msg)
}
}
try {
this.msg_handler(msg)
} catch (e) {
console.error(e)
}
})
this._client_comm = this.ns.comm_manager.get_client_comm(this.plot_id, this.client_comm_id, (msg: any) => this.on_ack(msg))
if (this.ns.shared_views == null) {
this.ns.shared_views = new Map()
}
if (this.ns.shared_views.has(this.plot_id)) {
this.ns.shared_views.get(this.plot_id).push(this)
} else {
this.ns.shared_views.set(this.plot_id, [this])
}
}
}
protected _document_listener: (event: DocumentChangedEvent) => void = (event) => this._document_changed(event)
protected override _doc_attached(): void {
super._doc_attached()
if (this.document != null) {
this.document.on_change(this._document_listener)
}
}
protected _document_changed(event: DocumentChangedEvent): void {
// Filter out changes to attributes that aren't server-visible
if (event instanceof ModelChangedEvent && !event.model.properties[event.attr].syncable) {
return
}
this._event_buffer.push(event)
if (!comm_settings.debounce) {
this.process_events()
} else if ((!this._blocked || (Date.now() > this._timeout))) {
setTimeout(() => this.process_events(), this.debounce)
this._blocked = true
this._timeout = Date.now()+this.timeout
}
}
protected _extract_buffers(value: unknown, buffers: ArrayBuffer[]): void {
if (isArray(value)) {
for (const val of value) {
this._extract_buffers(val, buffers)
}
} else if (isPlainObject(value)) {
if (size(value) == 1 && value.buffer instanceof ArrayBuffer) {
const {buffer} = value
delete value.buffer
const id = buffers.length
value.id = id
buffers.push(buffer)
} else {
for (const val of values(value)) {
this._extract_buffers(val, buffers)
}
}
}
}
process_events() {
if ((this.document == null) || (this._client_comm == null)) {
return
}
const patch = this.document.create_json_patch(this._event_buffer)
this._event_buffer = []
const message = {...Message.create("PATCH-DOC", {}, patch)}
const buffers: ArrayBuffer[] = []
this._extract_buffers(message.content, buffers)
this._client_comm.send(message, {}, buffers)
for (const view of this.ns.shared_views.get(this.plot_id)) {
if (view !== this && view.document != null) {
view.document.apply_json_patch(patch, [], this.id)
}
}
}
override disconnect_signals(): void {
super.disconnect_signals()
this.ns.shared_views.shared_views.delete(this.plot_id)
}
on_ack(msg: any) {
// Receives acknowledgement from Python, processing event
// and unblocking Comm if event queue empty
const metadata = msg.metadata
if (this._event_buffer.length > 0) {
this._blocked = true
this._timeout = Date.now()+this.timeout
this.process_events()
} else {
this._blocked = false
}
if ((metadata.msg_type == "Ready") && metadata.content) {
console.log("Python callback returned following output:", metadata.content)
} else if (metadata.msg_type == "Error") {
console.log("Python failed with the following traceback:", metadata.traceback)
}
}
msg_handler(msg: any) {
const metadata = msg.metadata
const buffers = msg.buffers
const content = msg.content.data
const plot_id = this.plot_id
if ((metadata.msg_type == "Ready")) {
if (metadata.content) {
console.log("Python callback returned following output:", metadata.content)
} else if (metadata.msg_type == "Error") {
console.log("Python failed with the following traceback:", metadata.traceback)
}
} else if (plot_id != null) {
let plot = null
if ((plot_id in this.ns.plot_index) && (this.ns.plot_index[plot_id] != null)) {
plot = this.ns.plot_index[plot_id]
} else if (((window as any).Bokeh !== undefined) && (plot_id in (window as any).Bokeh.index)) {
plot = (window as any).Bokeh.index[plot_id]
}
if (plot == null) {
return
}
if (content.length) {
this._receiver.consume(content)
} else if ((buffers != undefined) && (buffers.length > 0)) {
this._receiver.consume(buffers[0].buffer)
} else {
return
}
const comm_msg = this._receiver.message
if ((comm_msg != null) && (Object.keys(comm_msg.content as Patch).length > 0) && this.document != null) {
const patch = comm_msg.content as Patch
this.document.apply_json_patch(patch, comm_msg.buffers)
}
}
}
static override __module__ = "panel.models.comm_manager"
static {
this.prototype.default_view = CommManagerView
this.define<CommManager.Props>(({Int, Str, Nullable}) => ({
plot_id: [ Nullable(Str), null ],
comm_id: [ Nullable(Str), null ],
client_comm_id: [ Nullable(Str), null ],
timeout: [ Int, 5000 ],
debounce: [ Int, 50 ],
}))
}
}