Vihren Atlas

derivedImpl.ts ×9

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unlabeled · c_923b9a380880

190 tests · 6674 LOC · 59 files · introduces 0 tests · 47 LOC · 1 file

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Code
9 ranges47 lines · 1 files
Tests
0 tests

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All code (extent)
986 ranges6674 lines · 59 files · Browse complete extent
All tests (intent)
190 testsBrowse complete intent

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1 file ranked by introduced lines: 47 introduced LOC across 9 ranges. Expand a file to inspect source; the > gutter marks introduced lines.

src/vs/base/common/observableInternal/observables/derivedImpl.ts 47 introduced LOC · 9 ranges

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246
247 public beginUpdate<T>(_observable: IObservable<T>): void {
248 > if (this._isUpdating) { derivedImpl.ts
249 throw new BugIndicatingError('Cyclic deriveds are not supported yet!');
250 }
251 > derivedImpl.ts
252 > this._updateCount++;
253 > this._isUpdating = true;
254 > try {
255 > const propagateBeginUpdate = this._updateCount === 1;
256 > if (this._state === DerivedState.upToDate) {
257 > this._state = DerivedState.dependenciesMightHaveChanged;
258 > // If we propagate begin update, that will already signal a possible change.
259 > if (!propagateBeginUpdate) {
260 for (const r of this._observers) {
261 r.handlePossibleChange(this);
262 }
263 }
264 > } derivedImpl.ts
265 > if (propagateBeginUpdate) {
266 > for (const r of this._observers) {
267 > r.beginUpdate(this); // This signals a possible change
268 > }
269 > }
270 > } finally {
271 > this._isUpdating = false;
272 > }
273 > }
274
275 public endUpdate<T>(_observable: IObservable<T>): void {
276 > this._updateCount--; derivedImpl.ts
277 > if (this._updateCount === 0) {
278 > // End update could change the observer list.
279 > const observers = [...this._observers];
280 > for (const r of observers) {
281 > r.endUpdate(this);
282 > }
283 > if (this._removedObserverToCallEndUpdateOn) {
284 const observers = [...this._removedObserverToCallEndUpdateOn];
285 this._removedObserverToCallEndUpdateOn = null;
288 }
289 }
290 > } derivedImpl.ts
291 > assertFn(() => this._updateCount >= 0);
292 > }
293
294 public handlePossibleChange<T>(observable: IObservable<T>): void {
303
304 public handleChange<T, TChange>(observable: IObservableWithChange<T, TChange>, change: TChange): void {
305 > if (this._dependencies.has(observable) && !this._dependenciesToBeRemoved.has(observable) || this._isInBeforeUpdate) { derivedImpl.ts
306 > getLogger()?.handleDerivedDependencyChanged(this, observable, change);
307 >
308 > let shouldReact = false;
309 > try {
310 > shouldReact = this._changeTracker ? this._changeTracker.handleChange({
311 changedObservable: observable,
312 change,
313 // eslint-disable-next-line local/code-no-any-casts
314 didChange: (o): this is any => o === observable as any,
315 > }, this._changeSummary!) : true; derivedImpl.ts
316 > } catch (e) {
317 onBugIndicatingError(e);
318 }
319 > derivedImpl.ts
320 > const wasUpToDate = this._state === DerivedState.upToDate;
321 > if (shouldReact && (this._state === DerivedState.dependenciesMightHaveChanged || wasUpToDate)) {
322 > this._state = DerivedState.stale;
323 > if (wasUpToDate) {
324 for (const r of this._observers) {
325 r.handlePossibleChange(this);
326 }
327 }
328 > } derivedImpl.ts
329 > }
330 > }
331
332 // IReader Implementation

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