wip - concat document for notebook cells

src/vs/workbench/api/common/extHostNotebookConcatDocument.ts

@@ -0,0 +1,107 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import * as types from 'vs/workbench/api/common/extHostTypes';
+import * as vscode from 'vscode';
+import { Event, Emitter } from 'vs/base/common/event';
+import { ExtHostNotebookDocument } from 'vs/workbench/api/common/extHostNotebook';
+import { ExtHostDocuments } from 'vs/workbench/api/common/extHostDocuments';
+import { PrefixSumComputer } from 'vs/editor/common/viewModel/prefixSumComputer';
+import { ExtHostDocumentData } from 'vs/workbench/api/common/extHostDocumentData';
+import { Range } from 'vs/workbench/api/common/extHostTypeConverters';
+
+//todo@jrieken ConcatDiagnosticsCollection...
+
+export interface INotebookConcatDocument {
+	readonly versionId: number;
+	readonly onDidChange: Event<void>;
+	dispose(): void;
+	getText(): string;
+	locationAt(position: types.Position): types.Location;
+	positionAt(location: types.Location): types.Position;
+}
+
+export async function createConcatDocument(document: ExtHostNotebookDocument, extHostDocument: ExtHostDocuments) {
+
+	// const cells = new Map<string, ExtHostCell>();
+
+	const _onDidChange = new Emitter<void>();
+	const listener = extHostDocument.onDidChangeDocument(e => {
+		const key = e.document.uri.toString();
+		const cell = document.cells.find(candidate => candidate.uri.toString() === key);
+		if (cell) {
+
+			// todo@jrieken reuse raw event!
+			concatDocument.onEvents({
+				versionId: concatDocument.version + 1,
+				eol: '\n',
+				changes: e.contentChanges.map(change => {
+					return {
+						range: Range.from(change.range),
+						rangeOffset: change.rangeOffset,
+						rangeLength: change.rangeLength,
+						text: change.text,
+					};
+				})
+			});
+
+			_onDidChange.fire();
+		}
+	});
+
+	function dispose(): void {
+		listener.dispose();
+		concatDocument.dispose();
+	}
+
+	const lines: string[] = [];
+	const values = new Uint32Array(document.cells.length);
+	for (let i = 0; i < document.cells.length; i++) {
+
+		const cell = document.cells[i];
+
+		// update prefix sum
+		values[i] = cell.document.getText().length + 1; // 1 is newline
+
+		//todo@jrieken reuse lines!
+		for (let line = 0; line < cell.document.lineCount; line++) {
+			lines.push(cell.document.lineAt(line).text);
+		}
+	}
+
+	const cellStarts = new PrefixSumComputer(values);
+	const concatDocument = new ExtHostDocumentData(
+		null!,
+		document.uri.with({ scheme: 'vscode-concatdoc' }),
+		lines, '\n',
+		document.languages[0],
+		0, false
+	);
+
+	return {
+		get versionId() { return concatDocument.version; },
+		onDidChange: _onDidChange.event,
+		dispose,
+		getText() { return concatDocument.getText(); },
+		locationAt(position: types.Position): types.Location {
+			const offset = concatDocument.document.offsetAt(position);
+			const index = cellStarts.getIndexOf(offset);
+			const cell = document.cells[index.index];
+			const cellPosi = cell.document.positionAt(index.remainder);
+			return new types.Location(cell.uri, <any>cellPosi);
+		},
+		positionAt(location: types.Location): vscode.Position | undefined {
+			const idx = document.cells.findIndex(candidate => candidate.uri.toString() === location.uri.toString());
+			if (idx > 0) {
+				return undefined;
+			}
+			const docOffset = document.cells[idx].document.offsetAt(location.range.start);
+			const cellOffset = cellStarts.getAccumulatedValue(idx);
+			return concatDocument.document.positionAt(docOffset + cellOffset);
+		}
+	};
+}
+
+