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list: add load queue

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_loadLock set true when a load is happening, if another _load is called
when this is happening, the method call is appended to _loadQueue. When
a running _load finishes, it shift()s the _loadQueue and calls the
method from it if there is one.
This commit is contained in:
Harvey Tindall
2026-01-05 09:51:22 +00:00
parent c10f1e3b36
commit 721b209e1f
4 changed files with 48 additions and 14 deletions
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ts/modules/list.ts
+19
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@@ -359,6 +359,8 @@ export abstract class PaginatedList implements PageEventBindable {
return bottomIdx;
};
private _loadLock: boolean = false;
private _loadQueue: (() => void)[] = [];
private _load = (
itemLimit: number,
page: number,
@@ -367,7 +369,17 @@ export abstract class PaginatedList implements PageEventBindable {
post?: (resp: PaginatedDTO) => void,
failCallback?: (req: XMLHttpRequest) => void,
) => {
if (this._loadLock) {
console.debug("Queuing load, position:", this._loadQueue.length);
const now = Date.now();
this._loadQueue.push(() => {
console.debug("Queued load running, appended at:", now);
this._load(itemLimit, page, appendFunc, pre, post, failCallback);
});
return;
}
this._lastLoad = Date.now();
this._loadLock = true;
let params = this._search.inServerSearch ? this._searchParams : this.defaultParams();
params.limit = itemLimit;
params.page = page;
@@ -397,9 +409,14 @@ export abstract class PaginatedList implements PageEventBindable {
this._counter.loaded = this._search.ordering.length;
this._loadLock = false;
if (post) post(resp);
if (this._c.pageLoadCallback) this._c.pageLoadCallback(req);
const next = this._loadQueue.shift();
if (next) next();
},
true,
);
@@ -408,6 +425,7 @@ export abstract class PaginatedList implements PageEventBindable {
// Removes all elements, and reloads the first page.
public abstract reload: (callback?: (resp: PaginatedDTO) => void) => void;
protected _reload = (callback?: (resp: PaginatedDTO) => void) => {
console.trace("reloading");
this.lastPage = false;
this._counter.reset();
this._counter.getTotal(
@@ -446,6 +464,7 @@ export abstract class PaginatedList implements PageEventBindable {
// Loads the next page. If "loadAll", all pages will be loaded until the last is reached.
public abstract loadMore: (loadAll?: boolean, callback?: (resp?: PaginatedDTO) => void) => void;
protected _loadMore = (loadAll: boolean = false, callback?: (resp: PaginatedDTO) => void) => {
console.trace("loading more");
this._c.loadMoreButtons.forEach((v) => (v.disabled = true));
const timeout = setTimeout(() => {
this._c.loadMoreButtons.forEach((v) => (v.disabled = false));