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Copy pathfs.ts
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/*---------------------------------------------------------------------------------------------
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License. See License.txt in the project root for license information.
*--------------------------------------------------------------------------------------------*/
'use strict';
import {
CancellationToken,
Disposable,
Event,
EventEmitter,
FileChangeEvent,
FileChangeType,
FileSearchOptions,
FileSearchProvider,
FileSearchQuery,
FileStat,
FileSystemError,
FileSystemProvider,
FileType,
Progress,
TextSearchOptions,
TextSearchProvider,
TextSearchQuery,
TextSearchResult,
Uri,
workspace,
} from 'vscode';
import { IWritableChangeStore } from './changeStore';
import { ContextStore } from './contextStore';
import { GitHubApiContext } from './github/api';
const emptyDisposable = { dispose: () => { /* noop */ } };
const textEncoder = new TextEncoder();
export class VirtualFS implements FileSystemProvider, FileSearchProvider, TextSearchProvider, Disposable {
private _onDidChangeFile = new EventEmitter<FileChangeEvent[]>();
get onDidChangeFile(): Event<FileChangeEvent[]> {
return this._onDidChangeFile.event;
}
private readonly disposable: Disposable;
constructor(
readonly scheme: string,
private readonly contextStore: ContextStore<GitHubApiContext>,
private readonly changeStore: IWritableChangeStore,
private readonly fs: FileSystemProvider & FileSearchProvider & TextSearchProvider
) {
// TODO@eamodio listen for workspace folder changes
for (const context of contextStore.getForWorkspace()) {
// If we have a saved context, but no longer have any changes, reset the context
// We only do this on startup/reload to keep things consistent
if (!changeStore.hasChanges(context.folderUri)) {
console.log('Clear context', context.folderUri.toString());
contextStore.delete(context.folderUri);
}
}
this.disposable = Disposable.from(
workspace.registerFileSystemProvider(scheme, this, { isCaseSensitive: true }),
workspace.registerFileSearchProvider(scheme, this),
workspace.registerTextSearchProvider(scheme, this),
changeStore.onDidChange(e => {
switch (e.type) {
case 'created':
this._onDidChangeFile.fire([{ type: FileChangeType.Created, uri: e.uri }]);
break;
case 'changed':
this._onDidChangeFile.fire([{ type: FileChangeType.Changed, uri: e.uri }]);
break;
case 'deleted':
this._onDidChangeFile.fire([{ type: FileChangeType.Deleted, uri: e.uri }]);
break;
}
}),
);
}
dispose() {
this.disposable?.dispose();
}
private getOriginalResource(uri: Uri): Uri {
return this.contextStore.getOriginalResource(uri);
}
private getWorkspaceResource(uri: Uri): Uri {
return this.contextStore.getWorkspaceResource(uri);
}
//#region FileSystemProvider
watch(): Disposable {
return emptyDisposable;
}
async stat(uri: Uri): Promise<FileStat> {
let stat = this.changeStore.getStat(uri);
if (stat !== undefined) {
return stat;
}
stat = await this.fs.stat(this.getOriginalResource(uri));
return stat;
}
async readDirectory(uri: Uri): Promise<[string, FileType][]> {
let entries = await this.fs.readDirectory(this.getOriginalResource(uri));
entries = this.changeStore.updateDirectoryEntries(uri, entries);
return entries;
}
createDirectory(_uri: Uri): void | Thenable<void> {
// TODO@eamodio only support files for now
throw FileSystemError.NoPermissions();
}
async readFile(uri: Uri): Promise<Uint8Array> {
const content = this.changeStore.getContent(uri);
if (content !== undefined) {
return textEncoder.encode(content);
}
const data = await this.fs.readFile(this.getOriginalResource(uri));
return data;
}
async writeFile(uri: Uri, content: Uint8Array, options: { create: boolean, overwrite: boolean }): Promise<void> {
let stat;
try {
stat = await this.stat(uri);
if (!options.overwrite) {
throw FileSystemError.FileExists();
}
} catch (ex) {
if (ex instanceof FileSystemError && ex.code === 'FileNotFound') {
if (!options.create) {
throw FileSystemError.FileNotFound();
}
} else {
throw ex;
}
}
if (stat === undefined) {
await this.changeStore.onFileCreated(uri, content);
} else {
await this.changeStore.onFileChanged(uri, content, () => this.fs.readFile(this.getOriginalResource(uri)));
}
}
async delete(uri: Uri, _options: { recursive: boolean }): Promise<void> {
const stat = await this.stat(uri);
if (stat.type !== FileType.File) {
throw FileSystemError.NoPermissions();
}
await this.changeStore.onFileDeleted(uri);
}
async rename(oldUri: Uri, newUri: Uri, options: { overwrite: boolean }): Promise<void> {
const stat = await this.stat(oldUri);
// TODO@eamodio only support files for now
if (stat.type !== FileType.File) {
throw FileSystemError.NoPermissions();
}
const content = await this.readFile(oldUri);
await this.writeFile(newUri, content, { create: true, overwrite: options.overwrite });
await this.delete(oldUri, { recursive: false });
}
async copy(source: Uri, destination: Uri, options: { overwrite: boolean }): Promise<void> {
const stat = await this.stat(source);
// TODO@eamodio only support files for now
if (stat.type !== FileType.File) {
throw FileSystemError.NoPermissions();
}
const content = await this.readFile(source);
await this.writeFile(destination, content, { create: true, overwrite: options.overwrite });
}
//#endregion
//#region FileSearchProvider
provideFileSearchResults(
query: FileSearchQuery,
options: FileSearchOptions,
token: CancellationToken,
) {
return this.fs.provideFileSearchResults(query, { ...options, folder: this.getOriginalResource(options.folder) }, token);
}
//#endregion
//#region TextSearchProvider
provideTextSearchResults(
query: TextSearchQuery,
options: TextSearchOptions,
progress: Progress<TextSearchResult>,
token: CancellationToken,
) {
return this.fs.provideTextSearchResults(
query,
{ ...options, folder: this.getOriginalResource(options.folder) },
{ report: (result: TextSearchResult) => progress.report({ ...result, uri: this.getWorkspaceResource(result.uri) }) },
token
);
}
//#endregion
}