Function applyFileToEditor

src/lib/editorManager.js:1472–1600

(file, options = {})

	// Helper: apply a file's content and language to the editor view
	function applyFileToEditor(file, options = {}) {
		if (!file || file.type !== "editor") return;
		const { forceRecreate = false } = options;
		const extensionSignature = getEditorExtensionSignature(file);
		const languageSignature = getFileLanguageSignature(
			file,
			extensionSignature,
		);

		if (!forceRecreate && isReusableEditorState(file, extensionSignature)) {
			const reusedState = getRawEditorState(file.session);
			editor.setState(reusedState);
			applyCurrentEditorOptions(file);

			if (shouldApplyLanguage(file, reusedState, languageSignature)) {
				const ext = resolveLanguageExtension(
					file,
					languageSignature,
					"reused-language-reconfigure",
				);
				if (file.__cmLanguageReady) {
					dispatchLanguageExtension(
						file,
						languageSignature,
						ext,
						"reused-language-reconfigure",
					);
				}
			}

			restoreFileScrollPosition(file);
			scheduleLspForFile(file);
			return;
		}

		const syntax = getEmmetSyntaxForFile(file);
		const baseExtensions = createMainEditorExtensions({
			// Emmet needs to precede default keymaps so tracker Tab wins over indent
			emmetExtensions: createEmmetExtensionSet({ syntax }),
			baseExtensions: createConfiguredBaseExtensions(),
			commandKeymapExtension: getCommandKeymapExtension(),
			// keep compartment in the state to allow dynamic theme changes later
			themeExtension: themeCompartment.of(getConfiguredThemeExtension()),
			pointerCursorVisibilityExtension,
			shiftClickSelectionExtension,
			touchSelectionUpdateExtension,
			searchExtension: search(),
			// Keep dynamic compartments across state swaps
			optionExtensions: getBaseExtensionsFromOptions(),
		});
		const exts = [...baseExtensions];
		maybeAttachEmmetCompletions(exts, syntax);
		try {
			const initialLang = resolveLanguageExtension(
				file,
				languageSignature,
				"async-language-reconfigure",
			);