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40 lines
1.5 KiB
40 lines
1.5 KiB
4 months ago
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import { parentEntrySlot } from "./context.js";
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import { hasOwnProperty, maybeUnsubscribe, arrayFromSet, } from "./helpers.js";
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const EntryMethods = {
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setDirty: true,
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dispose: true,
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forget: true, // Fully remove parent Entry from LRU cache and computation graph
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};
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export function dep(options) {
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const depsByKey = new Map();
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const subscribe = options && options.subscribe;
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function depend(key) {
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const parent = parentEntrySlot.getValue();
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if (parent) {
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let dep = depsByKey.get(key);
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if (!dep) {
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depsByKey.set(key, dep = new Set);
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}
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parent.dependOn(dep);
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if (typeof subscribe === "function") {
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maybeUnsubscribe(dep);
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dep.unsubscribe = subscribe(key);
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}
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}
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}
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depend.dirty = function dirty(key, entryMethodName) {
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const dep = depsByKey.get(key);
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if (dep) {
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const m = (entryMethodName &&
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hasOwnProperty.call(EntryMethods, entryMethodName)) ? entryMethodName : "setDirty";
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// We have to use arrayFromSet(dep).forEach instead of dep.forEach,
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// because modifying a Set while iterating over it can cause elements in
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// the Set to be removed from the Set before they've been iterated over.
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arrayFromSet(dep).forEach(entry => entry[m]());
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depsByKey.delete(key);
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maybeUnsubscribe(dep);
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}
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};
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return depend;
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}
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//# sourceMappingURL=dep.js.map
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