mono-adapter.ts

type SpecialInputKeys = 'alt' | 'ctrl' | 'meta' | 'shift'
interface ClickEvent   { special_keys: SpecialInputKeys[] }
interface KeydownEvent { key: string, special_keys: SpecialInputKeys[] }
interface ChangeEvent  { stub: string }
interface BlurEvent    { stub: string }
interface InputEvent   { value: string }

type InEvent =
  { kind: 'location', el: number[], location: string } | // el not needed for location but Nim requires it.
  { kind: 'click',    el: number[], click:    ClickEvent } |
  { kind: 'dblclick', el: number[], dblclick: ClickEvent } |
  { kind: 'keydown',  el: number[], keydown:  KeydownEvent } |
  { kind: 'change',   el: number[], change:   ChangeEvent } |
  { kind: 'blur',     el: number[], blur:     BlurEvent } |
  { kind: 'input',    el: number[], input:    InputEvent }

type OutEvent =
  { kind: 'eval',   code: string } |
  { kind: 'update', diffs: Diff[] } |
  { kind: 'ignore' } |
  { kind: 'expired' } |
  { kind: 'error', message: string }

type InEventEnvelope =
  { kind: 'events', mono_id: string, events: InEvent[] } |
  { kind: 'pull', mono_id: string }

// Diff
type SafeHtml = string
type ElAttrKind = "string_prop" | "string_attr" | "bool_prop"
type ElAttrVal = [string, ElAttrKind] | string
type ElAttrDel = [string, ElAttrKind] | string

interface ApplyDiff {
  replace(id: number[], html: SafeHtml): void
  add_children(id: number[], els: SafeHtml[]): void
  set_children_len(id: number[], len: number): void
  set_attrs(id: number[], attrs: Record<string, ElAttrVal>): void
  del_attrs(id: number[], attrs: ElAttrDel[]): void
  set_text(id: number[], text: string): void
  set_html(id: number[], html: SafeHtml): void
}