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refactor(core): CORE-02 type emitter maps and fix nested once dispatch
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Harvey Zhao committed
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21 files changed
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@@ -18,9 +18,38 @@ boundaries rather than describing the entire core as TypeScript.
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These modules do not import the player, UI components or each other except for the
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barrel. Existing DOM and browser capability utilities remain JS and are re-exported
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unchanged. Emitter and Component are separate migration tasks. Imports from the
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unchanged. Emitter is now typed as described below; Component remains a later task. Imports from the
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barrel must not silently add runtime fields to `Artplayer.utils`.
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## Typed Emitter
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`src/utils/emitter.ts` keeps the original on/once/emit/off class and a lazy ordinary
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object registry. `declare e` emits no instance field; a fresh emitter still has no
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own keys. There are no additional prototype methods or mandatory constructor options.
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The generic event map associates event names with payload tuples, including readonly
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tuples, symbols and optional arguments. An open Record default preserves arbitrary
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JS event channels; internal typed consumers can use a closed map or intersect their
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known events with an open map. Receiver inference is checked on registration and
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erased inside each stored registration, where the original callback and ctx remain paired.
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Current JS player consumers remain incremental; public declaration expansion is CORE-07.
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Dispatch takes a shallow registration-array snapshot. Normal listeners removed during
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dispatch still run if already captured, additions wait for a later dispatch, and a
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throw stops that dispatch and propagates unchanged. Off accepts either a once wrapper
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or its original callback; duplicate registrations of a callback are removed together.
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The once wrapper unsubscribes before invoking user code and now records consumption,
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so a nested dispatch cannot execute a captured copy twice. This fixes a demonstrated
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old defect without changing ordinary snapshot behavior. Event names such as __proto__
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and toString use own properties rather than inherited Object.prototype values.
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Shared contracts in test/contracts/emitter.js run against published, workspace and
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installed versions. Candidate corrections have separate published-defect observations
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in test/public-behavior.test.js and test/browser/emitter.spec.js. The source type fixture
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checks event name/payload correlation, receiver types, custom channels and chain typing.
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Emitter owns registrations only; instance teardown must remove the relevant callbacks,
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not clear unrelated subscribers before destroy dispatch. Resource scopes follow in CORE-03.
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## Observable utility behavior
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- `def` is the native Object.defineProperty function. Property keys include symbols;
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@@ -77,5 +106,5 @@ core files in docs/compiled when committing a shippable core change.
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For new utility behavior, extend the same old/new contract tests. Clearly separate
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intentional defect corrections from preserved behavior. For timers or Blob URLs,
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also identify the owner and verify cleanup in the consuming module. Remaining
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constructor, playback, UI, Emitter, Component and capability migrations are recorded
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constructor, playback, UI, Component and capability migrations are recorded
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in refactor/tasks.json and should extend this map as they land.
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Vendored
+1
-1
@@ -4,4 +4,4 @@
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* (c) 2017-2026 Harvey Zhao
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* Released under the MIT License.
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*/
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o=t(a),n="5.4.1",i={properties:["audioTracks","autoplay","buffered","controller","controls","crossOrigin","currentSrc","currentTime","defaultMuted","defaultPlaybackRate","duration","ended","error","loop","mediaGroup","muted","networkState","paused","playbackRate","played","preload","readyState","seekable","seeking","src","startDate","textTracks","videoTracks","volume"],methods:["addTextTrack","canPlayType","load","play","pause"],events:["abort","canplay","canplaythrough","durationchange","emptied","ended","error","loadeddata","loadedmetadata","loadstart","pause","play","playing","progress","ratechange","seeked","seeking","stalled","suspend","timeupdate","volumechange","waiting"],prototypes:["width","height","videoWidth","videoHeight","poster","webkitDecodedFrameCount","webkitDroppedFrameCount","playsInline","webLine truncated
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o=t(a),n="5.4.1",i={properties:["audioTracks","autoplay","buffered","controller","controls","crossOrigin","currentSrc","currentTime","defaultMuted","defaultPlaybackRate","duration","ended","error","loop","mediaGroup","muted","networkState","paused","playbackRate","played","preload","readyState","seekable","seeking","src","startDate","textTracks","videoTracks","volume"],methods:["addTextTrack","canPlayType","load","play","pause"],events:["abort","canplay","canplaythrough","durationchange","emptied","ended","error","loadeddata","loadedmetadata","loadstart","pause","play","playing","progress","ratechange","seeked","seeking","stalled","suspend","timeupdate","volumechange","waiting"],prototypes:["width","height","videoWidth","videoHeight","poster","webkitDecodedFrameCount","webkitDroppedFrameCount","playsInline","webLine truncated
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+1
-1
@@ -4,4 +4,4 @@
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* (c) 2017-2026 Harvey Zhao
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* Released under the MIT License.
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*/
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o(t){return t.constructor?t.constructor.name:null}function a(t,e){var o=2<arguments.length&&void 0!==arguments[2]?arguments[2]:["option"];return n(t,e,o),i(t,e,o),function(t,e,o){var s=r(e),l=r(t);if("object"===s){if("object"!==l)throw new Error("[Type Error]: '".concat(o.join("."),"' require 'object' type, but got '").concat(l,"'"));Object.keys(e).forEach(function(r){var s=t[r],l=e[r],c=o.slice();c.push(r),n(s,l,c),i(s,l,c),a(s,l,c)})}if("array"===s){if("array"!==l)throw new Error("[Type Error]: '".concat(o.join("."),"' require 'array' type, but got '").concat(l,"'"));t.forEach(function(r,s){var l=t[s],c=e[s]||e[0],d=o.slice();d.push(s),n(l,c,d),i(l,c,d),a(l,c,d)})}}(t,e,o),t}function n(t,e,o){if("string"===r(e)){var a=r(t);if("?"===e[0]&&(e=e.slice(1)+"|undefined"),!(-1<e.indexOf("|")?e.split("|").map(function(t){return t.toLowerCase().trim()}).filter(Boolean).some(function(t){return a===t}):e.toLowerCase().trim()===a))throw new Error("[Type Error]: '".concat(o.join("."),"' require '").concat(e,"' type, but got '").concat(a,"'"))}}function i(t,e,o){if("function"===r(e)){var a=e(t,r(t),o);if(!0!==a){var n=r(a);throw"string"===n?new Error(a):"error"===n?a:new Error("[Validator Error]: The scheme for '".concat(o.join("."),"' validator require return true, but got '").concat(a,"'"))}}}return a.kindOf=r,a}()),u.exports);const f=p(m),g="5.4.1",v={properties:["audioTracks","autoplay","buffered","controller","controls","crossOrigin","currentSrc","currentTime","defaultMuted","defaultPlaybackRate","duration","ended","error","loop","meLine truncated
|
||||
+21
-8
@@ -4780,36 +4780,49 @@ class Template {
|
||||
}
|
||||
}
|
||||
}
|
||||
const owns = (object, key) => Object.prototype.hasOwnProperty.call(object, key);
|
||||
class Emitter {
|
||||
on(name, fn, ctx) {
|
||||
const e = this.e || (this.e = {});
|
||||
(e[name] || (e[name] = [])).push({ fn, ctx });
|
||||
let listeners = owns(e, name) ? e[name] : void 0;
|
||||
if (!listeners) {
|
||||
listeners = [];
|
||||
Object.defineProperty(e, name, { value: listeners, enumerable: true, configurable: true, writable: true });
|
||||
}
|
||||
listeners.push({ fn, ctx });
|
||||
return this;
|
||||
}
|
||||
once(name, fn, ctx) {
|
||||
const self = this;
|
||||
const callback = fn;
|
||||
let fired = false;
|
||||
function listener(...args) {
|
||||
if (fired)
|
||||
return;
|
||||
fired = true;
|
||||
self.off(name, listener);
|
||||
fn.apply(ctx, args);
|
||||
callback.apply(ctx, args);
|
||||
}
|
||||
listener._ = fn;
|
||||
return this.on(name, listener, ctx);
|
||||
}
|
||||
emit(name, ...data) {
|
||||
const evtArr = ((this.e || (this.e = {}))[name] || []).slice();
|
||||
for (let i = 0; i < evtArr.length; i += 1) {
|
||||
evtArr[i].fn.apply(evtArr[i].ctx, data);
|
||||
const e = this.e || (this.e = {});
|
||||
const snapshot = (owns(e, name) ? e[name] || [] : []).slice();
|
||||
for (const event of snapshot) {
|
||||
event.fn.apply(event.ctx, data);
|
||||
}
|
||||
return this;
|
||||
}
|
||||
off(name, callback) {
|
||||
const e = this.e || (this.e = {});
|
||||
const evts = e[name];
|
||||
const evts = owns(e, name) ? e[name] : void 0;
|
||||
const liveEvents = [];
|
||||
if (evts && callback) {
|
||||
for (let i = 0, len = evts.length; i < len; i += 1) {
|
||||
if (evts[i].fn !== callback && evts[i].fn._ !== callback)
|
||||
liveEvents.push(evts[i]);
|
||||
const event = evts[i];
|
||||
if (event.fn !== callback && event.fn._ !== callback)
|
||||
liveEvents.push(event);
|
||||
}
|
||||
}
|
||||
if (liveEvents.length) {
|
||||
|
||||
@@ -1,44 +0,0 @@
|
||||
export default class Emitter {
|
||||
on(name, fn, ctx) {
|
||||
const e = this.e || (this.e = {});
|
||||
(e[name] || (e[name] = [])).push({ fn, ctx })
|
||||
return this
|
||||
}
|
||||
|
||||
once(name, fn, ctx) {
|
||||
const self = this
|
||||
function listener(...args) {
|
||||
self.off(name, listener)
|
||||
fn.apply(ctx, args)
|
||||
}
|
||||
listener._ = fn
|
||||
return this.on(name, listener, ctx)
|
||||
}
|
||||
|
||||
emit(name, ...data) {
|
||||
const evtArr = ((this.e || (this.e = {}))[name] || []).slice()
|
||||
for (let i = 0; i < evtArr.length; i += 1) {
|
||||
evtArr[i].fn.apply(evtArr[i].ctx, data)
|
||||
}
|
||||
return this
|
||||
}
|
||||
|
||||
off(name, callback) {
|
||||
const e = this.e || (this.e = {})
|
||||
const evts = e[name]
|
||||
const liveEvents = []
|
||||
if (evts && callback) {
|
||||
for (let i = 0, len = evts.length; i < len; i += 1) {
|
||||
if (evts[i].fn !== callback && evts[i].fn._ !== callback)
|
||||
liveEvents.push(evts[i])
|
||||
}
|
||||
}
|
||||
if (liveEvents.length) {
|
||||
e[name] = liveEvents
|
||||
}
|
||||
else {
|
||||
delete e[name]
|
||||
}
|
||||
return this
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,69 @@
|
||||
type EventMap<Events> = { [Name in keyof Events]: readonly unknown[] }
|
||||
type Listener<Args extends unknown[]> = ((...args: Args) => unknown) & { _?: (...args: Args) => unknown }
|
||||
interface Registration<Args extends unknown[]> {
|
||||
fn: Listener<Args>
|
||||
ctx: unknown
|
||||
}
|
||||
type Registry<Events extends EventMap<Events>> = { [Name in keyof Events]?: Registration<[...Events[Name]]>[] }
|
||||
const owns = (object: object, key: PropertyKey) => Object.prototype.hasOwnProperty.call(object, key)
|
||||
|
||||
export default class Emitter<Events extends EventMap<Events> = Record<PropertyKey, unknown[]>> {
|
||||
declare e?: Registry<Events>
|
||||
|
||||
on<Name extends keyof Events, Context>(name: Name, fn: (this: Context, ...args: [...Events[Name]]) => unknown, ctx?: Context): this {
|
||||
const e: Registry<Events> = this.e || (this.e = {})
|
||||
let listeners = owns(e, name) ? e[name] : undefined
|
||||
if (!listeners) {
|
||||
listeners = []
|
||||
Object.defineProperty(e, name, { value: listeners, enumerable: true, configurable: true, writable: true })
|
||||
}
|
||||
listeners.push({ fn, ctx })
|
||||
return this
|
||||
}
|
||||
|
||||
once<Name extends keyof Events, Context>(name: Name, fn: (this: Context, ...args: [...Events[Name]]) => unknown, ctx?: Context): this {
|
||||
// eslint-disable-next-line ts/no-this-alias -- The once wrapper unsubscribes its owner, independently of callback ctx.
|
||||
const self = this
|
||||
const callback: Listener<[...Events[Name]]> = fn
|
||||
let fired = false
|
||||
function listener(...args: [...Events[Name]]) {
|
||||
if (fired)
|
||||
return
|
||||
fired = true
|
||||
self.off(name, listener)
|
||||
callback.apply(ctx, args)
|
||||
}
|
||||
listener._ = fn
|
||||
return this.on(name, listener, ctx)
|
||||
}
|
||||
|
||||
emit<Name extends keyof Events>(name: Name, ...data: [...Events[Name]]): this {
|
||||
const e: Registry<Events> = this.e || (this.e = {})
|
||||
const snapshot = (owns(e, name) ? e[name] || [] : []).slice()
|
||||
for (const event of snapshot) {
|
||||
event.fn.apply(event.ctx, data)
|
||||
}
|
||||
return this
|
||||
}
|
||||
|
||||
off<Name extends keyof Events>(name: Name, callback?: Listener<[...Events[Name]]>): this {
|
||||
const e: Registry<Events> = this.e || (this.e = {})
|
||||
const evts = owns(e, name) ? e[name] : undefined
|
||||
const liveEvents: Registration<[...Events[Name]]>[] = []
|
||||
if (evts && callback) {
|
||||
for (let i = 0, len = evts.length; i < len; i += 1) {
|
||||
// Registrations are inserted densely; retain the captured-length traversal.
|
||||
const event = evts[i]!
|
||||
if (event.fn !== callback && event.fn._ !== callback)
|
||||
liveEvents.push(event)
|
||||
}
|
||||
}
|
||||
if (liveEvents.length) {
|
||||
e[name] = liveEvents
|
||||
}
|
||||
else {
|
||||
delete e[name]
|
||||
}
|
||||
return this
|
||||
}
|
||||
}
|
||||
Reference in new issue
Block a user