79 lines
2.4 KiB
JavaScript
79 lines
2.4 KiB
JavaScript
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.Tracker = void 0;
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const system_1 = require("./system");
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class Tracker {
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constructor(spread, effect) {
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this.spread = spread;
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this.effect = effect;
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this.dirtyLevel = 3 /* DirtyLevels.Dirty */;
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this.trackId = 0;
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this.runnings = 0;
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this.queryings = 0;
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this.depsLength = 0;
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}
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get dirty() {
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if (this.dirtyLevel === 1 /* DirtyLevels.ComputedValueMaybeDirty */) {
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this.dirtyLevel = 0 /* DirtyLevels.NotDirty */;
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if (this.trackToken) {
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const deps = system_1.depsMap.get(this.trackToken);
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if (deps) {
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this.queryings++;
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(0, system_1.pauseTracking)();
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for (const dep of deps) {
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if (dep.computed) {
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dep.computed();
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if (this.dirtyLevel >= 2 /* DirtyLevels.ComputedValueDirty */) {
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break;
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}
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}
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}
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(0, system_1.resetTracking)();
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this.queryings--;
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}
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}
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}
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return this.dirtyLevel >= 2 /* DirtyLevels.ComputedValueDirty */;
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}
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track(fn) {
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try {
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system_1.activeTrackers.push(this);
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this.runnings++;
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preCleanup(this);
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return fn();
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}
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finally {
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postCleanup(this);
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this.runnings--;
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system_1.activeTrackers.pop();
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if (!this.runnings) {
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this.dirtyLevel = 0 /* DirtyLevels.NotDirty */;
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}
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}
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}
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reset() {
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preCleanup(this);
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postCleanup(this);
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this.dirtyLevel = 3 /* DirtyLevels.Dirty */;
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}
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deref() {
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return this;
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}
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}
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exports.Tracker = Tracker;
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function preCleanup(tracker) {
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tracker.trackId++;
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tracker.depsLength = 0;
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}
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function postCleanup(tracker) {
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if (tracker.trackToken) {
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const deps = system_1.depsMap.get(tracker.trackToken);
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if (deps && deps.length > tracker.depsLength) {
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for (let i = tracker.depsLength; i < deps.length; i++) {
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(0, system_1.cleanupDepEffect)(deps[i], tracker);
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}
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deps.length = tracker.depsLength;
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}
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}
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}
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