Kelvin Schoofs
6 years ago
parent
bbd053609a
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8c2360b0ef
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/*---------------------------------------------------------------------------------------------
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* Copyright (c) Microsoft Corporation. All rights reserved.
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* Licensed under the MIT License. See License.txt in the project root for license information.
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*--------------------------------------------------------------------------------------------*/
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'use strict';
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import * as fs from 'fs';
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import * as path from 'path';
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import * as vscode from 'vscode';
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export class File implements vscode.FileStat {
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public type: vscode.FileType;
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public ctime: number;
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public mtime: number;
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public size: number;
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public name: string;
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public data: Uint8Array;
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constructor(name: string) {
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this.type = vscode.FileType.File;
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this.ctime = Date.now();
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this.mtime = Date.now();
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this.size = 0;
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this.name = name;
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}
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}
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export class Directory implements vscode.FileStat {
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public type: vscode.FileType;
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public ctime: number;
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public mtime: number;
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public size: number;
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public name: string;
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public entries: Map<string, File | Directory>;
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constructor(name: string) {
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this.type = vscode.FileType.Directory;
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this.ctime = Date.now();
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this.mtime = Date.now();
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this.size = 0;
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this.name = name;
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this.entries = new Map();
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}
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}
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export type Entry = File | Directory;
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export class MemFs implements vscode.FileSystemProvider {
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public readonly onDidChangeFile: vscode.Event<vscode.FileChangeEvent[]>;
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public root = new Directory('');
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private emitter = new vscode.EventEmitter<vscode.FileChangeEvent[]>();
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private bufferedEvents: vscode.FileChangeEvent[] = [];
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private fireSoonHandle: NodeJS.Timer;
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constructor() {
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this.onDidChangeFile = this.emitter.event;
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}
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public stat(uri: vscode.Uri): vscode.FileStat {
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return this.lookup(uri, false);
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}
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public readDirectory(uri: vscode.Uri): [string, vscode.FileType][] {
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const entry = this.lookupAsDirectory(uri, false);
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const result: [string, vscode.FileType][] = [];
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for (const [name, child] of entry.entries) {
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result.push([name, child.type]);
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}
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return result;
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}
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// --- manage file contents
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public readFile(uri: vscode.Uri): Uint8Array {
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return this.lookupAsFile(uri, false).data;
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}
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public writeFile(uri: vscode.Uri, content: Uint8Array, options: { create: boolean, overwrite: boolean }): void {
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const basename = path.posix.basename(uri.path);
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const parent = this.lookupParentDirectory(uri);
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let entry = parent.entries.get(basename);
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if (entry instanceof Directory) {
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throw vscode.FileSystemError.FileIsADirectory(uri);
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}
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if (!entry && !options.create) {
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throw vscode.FileSystemError.FileNotFound(uri);
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}
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if (entry && options.create && !options.overwrite) {
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throw vscode.FileSystemError.FileExists(uri);
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}
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if (!entry) {
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entry = new File(basename);
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parent.entries.set(basename, entry);
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this.fireSoon({ uri, type: vscode.FileChangeType.Created });
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}
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entry.mtime = Date.now();
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entry.size = content.byteLength;
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entry.data = content;
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this.fireSoon({ uri, type: vscode.FileChangeType.Changed });
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}
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// --- manage files/folders
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public rename(oldUri: vscode.Uri, newUri: vscode.Uri, options: { overwrite: boolean }): void {
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if (!options.overwrite && this.lookup(newUri, true)) {
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throw vscode.FileSystemError.FileExists(newUri);
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}
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const entry = this.lookup(oldUri, false);
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const oldParent = this.lookupParentDirectory(oldUri);
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const newParent = this.lookupParentDirectory(newUri);
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const newName = path.posix.basename(newUri.path);
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oldParent.entries.delete(entry.name);
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entry.name = newName;
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newParent.entries.set(newName, entry);
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this.fireSoon(
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{ type: vscode.FileChangeType.Deleted, uri: oldUri },
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{ type: vscode.FileChangeType.Created, uri: newUri },
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);
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}
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public delete(uri: vscode.Uri): void {
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const dirname = uri.with({ path: path.posix.dirname(uri.path) });
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const basename = path.posix.basename(uri.path);
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const parent = this.lookupAsDirectory(dirname, false);
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if (!parent.entries.has(basename)) {
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throw vscode.FileSystemError.FileNotFound(uri);
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}
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parent.entries.delete(basename);
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parent.mtime = Date.now();
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parent.size -= 1;
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this.fireSoon({ type: vscode.FileChangeType.Changed, uri: dirname }, { uri, type: vscode.FileChangeType.Deleted });
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}
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public createDirectory(uri: vscode.Uri): void {
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const basename = path.posix.basename(uri.path);
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const dirname = uri.with({ path: path.posix.dirname(uri.path) });
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const parent = this.lookupAsDirectory(dirname, false);
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const entry = new Directory(basename);
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parent.entries.set(entry.name, entry);
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parent.mtime = Date.now();
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parent.size += 1;
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this.fireSoon({ type: vscode.FileChangeType.Changed, uri: dirname }, { uri, type: vscode.FileChangeType.Created });
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}
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public watch(resource: vscode.Uri, opts): vscode.Disposable {
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// ignore, fires for all changes...
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return new vscode.Disposable(() => { });
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}
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private lookup(uri: vscode.Uri, silent: false): Entry;
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private lookup(uri: vscode.Uri, silent: boolean): Entry | undefined;
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private lookup(uri: vscode.Uri, silent: boolean): Entry | undefined {
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const parts = uri.path.split('/');
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let entry: Entry = this.root;
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for (const part of parts) {
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if (!part) {
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continue;
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}
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let child: Entry | undefined;
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if (entry instanceof Directory) {
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child = entry.entries.get(part);
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}
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if (!child) {
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if (!silent) {
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throw vscode.FileSystemError.FileNotFound(uri);
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} else {
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return undefined;
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}
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}
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entry = child;
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}
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return entry;
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}
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private lookupAsDirectory(uri: vscode.Uri, silent: boolean): Directory {
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const entry = this.lookup(uri, silent);
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if (entry instanceof Directory) {
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return entry;
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}
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throw vscode.FileSystemError.FileNotADirectory(uri);
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}
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private lookupAsFile(uri: vscode.Uri, silent: boolean): File {
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const entry = this.lookup(uri, silent);
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if (entry instanceof File) {
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return entry;
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}
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throw vscode.FileSystemError.FileIsADirectory(uri);
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}
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private lookupParentDirectory(uri: vscode.Uri): Directory {
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const dirname = uri.with({ path: path.posix.dirname(uri.path) });
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return this.lookupAsDirectory(dirname, false);
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}
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private fireSoon(...events: vscode.FileChangeEvent[]): void {
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this.bufferedEvents.push(...events);
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clearTimeout(this.fireSoonHandle);
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this.fireSoonHandle = setTimeout(() => {
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this.emitter.fire(this.bufferedEvents);
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this.bufferedEvents.length = 0;
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}, 5);
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}
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}
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