perf: use PCancelable for cancelable tasks

src/main.ts

@@ -5,29 +5,68 @@ import {
 	AutomaticLinkerSettings,
 	DEFAULT_SETTINGS,
 } from "./settings";
+import PCancelable from "p-cancelable";
 
 export default class AutomaticLinkerPlugin extends Plugin {
 	settings: AutomaticLinkerSettings;
-
 	private allFileNames: string[] = [];
+	// Holds the currently running modifyLinks task
+	private currentModifyLinks: PCancelable<void> | null = null;
 
 	constructor(app: App, pluginManifest: PluginManifest) {
 		super(app, pluginManifest);
 	}
 
+	// Cancelable function to modify links in the active file
 	async modifyLinks() {
-		const activeFile = this.app.workspace.getActiveFile();
-		if (!activeFile) return;
-		const fileContent = await this.app.vault.read(activeFile);
+		// If a previous task is running, cancel it first.
+		if (this.currentModifyLinks) {
+			this.currentModifyLinks.cancel();
+		}
 
+		const cancelableTask = new PCancelable<void>(
+			async (resolve, reject, onCancel) => {
+				const activeFile = this.app.workspace.getActiveFile();
+				if (!activeFile) {
+					resolve();
+					return;
+				}
+
+				// Flag to track cancellation within this task.
+				let canceled = false;
+				onCancel(() => {
+					canceled = true;
+				});
+
+				try {
+					// Read the active file's content
+					const fileContent = await this.app.vault.read(activeFile);
+					// If the task was canceled after reading, abort processing.
+					if (canceled) {
+						return reject(new PCancelable.CancelError());
+					}
+					// Replace links using the provided utility function.
 					const updatedContent = await replaceLinks({
 						fileContent,
 						allFileNames: this.allFileNames,
 						getFrontMatterInfo,
 						specialDirs: this.settings.specialDirs,
 					});
-
+					// Check again if the task has been canceled.
+					if (canceled) {
+						return reject(new PCancelable.CancelError());
+					}
+					// Modify the active file with the updated content.
 					await this.app.vault.modify(activeFile, updatedContent);
+					resolve();
+				} catch (error) {
+					reject(error);
+				}
+			},
+		);
+
+		this.currentModifyLinks = cancelableTask;
+		return cancelableTask;
 	}
 
 	async onload() {
@@ -42,41 +81,46 @@ export default class AutomaticLinkerPlugin extends Plugin {
 			const allFileNames = allMarkdownFiles.map((file) =>
 				file.path.replace(/\.md$/, ""),
 			);
-			// Sort by descending length so that longer paths match first.
+			// Sort file names in descending order by length so longer paths match first.
 			allFileNames.sort((a, b) => b.length - a.length);
 			this.allFileNames = allFileNames;
 		};
 
+		// Load markdown file names when the layout is ready.
 		this.app.workspace.onLayoutReady(() => {
 			loadMarkdownFiles();
 			console.log("Automatic Linker: Loaded all markdown files.");
 			console.log("this.allFileNames.length", this.allFileNames.length);
 		});
 		this.registerEvent(
-			this.app.vault.on("delete", () => {
-				loadMarkdownFiles();
-			}),
+			this.app.vault.on("delete", () => loadMarkdownFiles()),
 		);
 		this.registerEvent(
-			this.app.vault.on("create", () => {
-				loadMarkdownFiles();
-			}),
+			this.app.vault.on("create", () => loadMarkdownFiles()),
 		);
 		this.registerEvent(
-			this.app.vault.on("rename", () => {
-				loadMarkdownFiles();
-			}),
+			this.app.vault.on("rename", () => loadMarkdownFiles()),
 		);
 
+		// Add a command to trigger modifyLinks manually.
 		this.addCommand({
 			id: "automatic-linker:link-current-file",
 			name: "Link current file",
 			editorCallback: async () => {
+				try {
 					await this.modifyLinks();
+				} catch (error) {
+					// If the task was canceled, log that it was canceled.
+					if (error instanceof PCancelable.CancelError) {
+						console.log("modifyLinks was canceled");
+					} else {
+						console.error(error);
+					}
+				}
 			},
 		});
 
-		// Override the save command callback if available.
+		// Optionally, override the default save command to run modifyLinks with debounce.
 		const saveCommandDefinition = (this.app as any)?.commands?.commands?.[
 			"editor:save-file"
 		];
@@ -85,11 +129,17 @@ export default class AutomaticLinkerPlugin extends Plugin {
 			// Create a debounced version of modifyLinks with a 300ms delay.
 			const debouncedModifyLinks = debounce(async () => {
 				if (this.settings.formatOnSave) {
+					try {
 						await this.modifyLinks();
+					} catch (error) {
+						if (!(error instanceof PCancelable.CancelError)) {
+							console.error(error);
+						}
+					}
 				}
 			}, 300);
 			saveCommandDefinition.callback = async () => {
-				// Call the debounced modifyLinks function.
+				// Call the debounced modifyLinks function first.
 				debouncedModifyLinks();
 				// Then, call the original save function.
 				save();
@@ -114,7 +164,6 @@ export default class AutomaticLinkerPlugin extends Plugin {
 function debounce<T extends (...args: any[]) => any>(func: T, wait: number): T {
 	let timeout: ReturnType<typeof setTimeout>;
 	return function (this: any, ...args: any[]) {
-		// eslint-disable-next-line @typescript-eslint/no-this-alias
 		const context = this;
 		clearTimeout(timeout);
 		timeout = setTimeout(() => func.apply(context, args), wait);

tsconfig.json

@@ -11,6 +11,7 @@
     "importHelpers": true,
     "isolatedModules": true,
     "strictNullChecks": true,
+	"allowSyntheticDefaultImports": true,
     "lib": [
       "DOM",
       "ES5",