sdedic commented on a change in pull request #3382:
URL: https://github.com/apache/netbeans/pull/3382#discussion_r772579567
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File path: java/java.lsp.server/vscode/src/explorer.ts
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@@ -154,42 +169,131 @@ class VisualizerProvider extends vscode.Disposable
implements CustomizableTreeDa
}
getTreeItem(element: Visualizer): vscode.TreeItem |
Thenable<vscode.TreeItem> {
- const n = Number(element.id);
- if (this.pendingRefresh.delete(n)) {
- return this.fetchItem(n).then((newV) => {
- element.update(newV);
- return element;
- });
+ const n : number = Number(element.id);
+ const self = this;
+ if (doLog) {
+ this.log.appendLine(`Doing getTreeItem on ${element.idstring()}`);
+ }
+
+ return this.wrap(async (arr) => {
+ let fetched = await this.queryVisualizer(element, arr, () =>
this.fetchItem(n));
+ element.update(fetched);
+ return self.getTreeItem2(fetched);
+ });
+ }
+
+ /**
+ * Wraps code that queries individual Visualizers so that blocked changes
are fired after
+ * the code terminated.
+ *
+ * Usage:
+ * wrap(() => { ... code ... ; queryVisualizer(vis, () => { ... })});
+ * @param fn the code to execute
+ * @returns value of the code function
+ */
+ async wrap<X>(fn : (pending : Visualizer[]) => Thenable<X>) : Promise<X> {
+ let arr : Visualizer[] = [];
+ try {
+ return await fn(arr);
+ } finally {
+ this.releaseVisualizersAndFire(arr);
+ }
+ }
+
+ /**
+ * Just creates a string list from visualizer IDs. Diagnostics only.
+ */
+ private visualizerList(arr : Visualizer[]) : string {
+ let s = "";
+ for (let v of arr) {
+ s += v.idstring() + " ";
+ }
+ return s;
+ }
+
+ /**
+ * Do not use directly, use wrap(). Fires delayed events for visualizers
that have no pending queries.
+ */
+ private releaseVisualizersAndFire(list : Visualizer[] | undefined) {
+ if (!list) {
+ list = Array.from(this.delayedFire);
+ }
+ if (doLog) {
+ this.log.appendLine(`Done with ${this.visualizerList(list)}`);
+ }
+ // v can be in list several times, each push increased its counter, so we
need to decrease it.
+ for (let v of list) {
+ if (this.treeData?.get(Number(v.id || -1)) === v) {
+ if (--v.pendingQueries) {
+ if (doLog) {
+ this.log.appendLine(`${v.idstring()} has pending
${v.pendingQueries} queries`);
+ }
+ continue;
+ }
+ if (v.pendingChange) {
+ if (doLog) {
+ this.log.appendLine(`Fire delayed change on ${v.idstring()}`);
+ }
+ this.fireItemChange(v);
+ v.pendingChange = false;
+ }
+ }
+ this.delayedFire.delete(v);
}
+ if (doLog) {
+ this.log.appendLine("Pending queue: " +
this.visualizerList(Array.from(this.delayedFire)));
+ this.log.appendLine("---------------");
+ }
+ }
+
+ /**
+ * Should wrap calls to NBLS for individual visualizers (info, children).
Puts visualizer on the delayed fire list.
+ * Must be itself wrapped in wrap() -- wrap(... queryVisualizer()).
+ * @param element visualizer to be queried, possibly undefined (new item is
expected)
+ * @param fn code to execute
+ * @returns code's result
+ */
+ async queryVisualizer<X>(element : Visualizer | undefined, pending :
Visualizer[], fn : () => Promise<X>) : Promise<X> {
+ if (!element) {
+ return fn();
+ }
+ this.delayedFire.add(element);
+ pending.push(element);
+ element.pendingQueries++;
+ if (doLog) {
+ this.log.appendLine(`Delaying visualizer ${element.idstring()}, queries
= ${element.pendingQueries}`)
+ }
+ return fn();
+ }
+
+ async getTreeItem2(element: Visualizer): Promise<vscode.TreeItem> {
+ const n = Number(element.id);
if (this.decorators.length == 0) {
- return element;
+ return element;
}
let list : TreeItemDecorator<Visualizer>[] = [...this.decorators];
- function f(item : vscode.TreeItem) : vscode.TreeItem |
Thenable<vscode.TreeItem> {
+ async function f(item : vscode.TreeItem) : Promise<vscode.TreeItem> {
const deco = list.shift();
if (!deco) {
- return item;
+ return item;
}
const decorated = deco.decorateTreeItem(element, item);
if (decorated instanceof vscode.TreeItem) {
return f(decorated);
} else {
- return (decorated as Thenable<vscode.TreeItem>).then(f);
+ return (decorated as Thenable<vscode.TreeItem>).then(f);
}
}
-
return f(element.copy());
}
+ delayedFire : Set<Visualizer> = new Set<Visualizer>();
+
async fetchItem(n : number) : Promise<Visualizer> {
+ let refreshVis = this.treeData.get(n);
Review comment:
Right it is a leftover. Updates of the existing `Visualizer` instances
are done in `fetchItem` callers.
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