| 1 | import { BrowserWindow, session } from "electron"; |
| 2 | import { errorText, type Logger } from "./log.js"; |
| 3 | |
| 4 | const HOST_KEY = /^[A-Za-z0-9._-]{1,128}$/; |
| 5 | const REMOTE_PERMISSIONS = new Set(["clipboard-read", "clipboard-sanitized-write", "fullscreen"]); |
| 6 | |
| 7 | interface RemoteEntry { |
| 8 | win: BrowserWindow; |
| 9 | origin: string; |
| 10 | } |
| 11 | |
| 12 | export interface RemoteWindowInput { |
| 13 | hostKey: string; |
| 14 | url: string; |
| 15 | title: string; |
| 16 | } |
| 17 | |
| 18 | function remoteURL(value: string): URL { |
| 19 | const url = new URL(value); |
| 20 | if (url.protocol !== "http:" && url.protocol !== "https:") throw new Error(`remote window URL must be http(s): ${value}`); |
| 21 | return url; |
| 22 | } |
| 23 | |
| 24 | function sameOrigin(candidate: string, origin: string): boolean { |
| 25 | try { |
| 26 | return new URL(candidate).origin === origin; |
| 27 | } catch { |
| 28 | return false; |
| 29 | } |
| 30 | } |
| 31 | |
| 32 | export class RemoteWindowHost { |
| 33 | private readonly windows = new Map<string, RemoteEntry>(); |
| 34 | |
| 35 | constructor(private readonly deps: { platform: NodeJS.Platform; icon?: string; log: Logger; onClosed?: (hostKey: string) => void }) {} |
| 36 | |
| 37 | open(input: RemoteWindowInput): { windowId: string } { |
| 38 | if (!HOST_KEY.test(input.hostKey)) throw new Error("invalid remote window host key"); |
| 39 | const target = remoteURL(input.url); |
| 40 | const existing = this.entry(input.hostKey); |
| 41 | if (existing) { |
| 42 | this.navigate(input); |
| 43 | existing.win.show(); |
| 44 | return { windowId: String(existing.win.id) }; |
| 45 | } |
| 46 | const partition = session.fromPartition(`persist:remote-${input.hostKey}`); |
| 47 | partition.setPermissionRequestHandler((_contents, permission, callback) => callback(REMOTE_PERMISSIONS.has(permission))); |
| 48 | const win = new BrowserWindow({ |
| 49 | width: 1180, |
| 50 | height: 820, |
| 51 | minWidth: 760, |
| 52 | minHeight: 480, |
| 53 | show: false, |
| 54 | title: input.title || "Reasonix", |
| 55 | backgroundColor: "#1a1a2e", |
| 56 | autoHideMenuBar: true, |
| 57 | icon: this.deps.icon, |
| 58 | webPreferences: { session: partition, sandbox: true, contextIsolation: true, nodeIntegration: false, spellcheck: false }, |
| 59 | }); |
| 60 | const entry: RemoteEntry = { win, origin: target.origin }; |
| 61 | this.windows.set(input.hostKey, entry); |
| 62 | if (this.deps.platform !== "darwin") win.setMenuBarVisibility(false); |
| 63 | win.webContents.setWindowOpenHandler(() => ({ action: "deny" })); |
| 64 | const guard = (event: { preventDefault(): void }, next: string) => { |
| 65 | if (sameOrigin(next, entry.origin)) return; |
| 66 | event.preventDefault(); |
| 67 | this.deps.log.warn(`remote window ${input.hostKey}: blocked navigation to ${next}`); |
| 68 | }; |
| 69 | win.webContents.on("will-navigate", guard); |
| 70 | win.webContents.on("will-redirect", guard); |
| 71 | win.on("closed", () => { |
| 72 | if (this.windows.get(input.hostKey) !== entry) return; |
| 73 | this.windows.delete(input.hostKey); |
| 74 | this.deps.onClosed?.(input.hostKey); |
| 75 | }); |
| 76 | win.once("ready-to-show", () => win.show()); |
| 77 | void win.loadURL(target.href).catch((error: unknown) => { |
| 78 | this.deps.log.warn(`remote window ${input.hostKey}: load failed: ${errorText(error)}`); |
| 79 | }); |
| 80 | return { windowId: String(win.id) }; |
| 81 | } |
| 82 | |
| 83 | navigate(input: RemoteWindowInput): void { |
| 84 | const entry = this.entry(input.hostKey); |
| 85 | if (!entry) throw new Error(`no remote window for ${input.hostKey}`); |
| 86 | const target = remoteURL(input.url); |
| 87 | entry.origin = target.origin; |
| 88 | if (input.title) entry.win.setTitle(input.title); |
| 89 | void entry.win.loadURL(target.href).catch((error: unknown) => { |
| 90 | this.deps.log.warn(`remote window ${input.hostKey}: navigation failed: ${errorText(error)}`); |
| 91 | }); |
| 92 | } |
| 93 | |
| 94 | focus(hostKey: string): void { |
| 95 | const entry = this.entry(hostKey); |
| 96 | if (!entry) throw new Error(`no remote window for ${hostKey}`); |
| 97 | if (entry.win.isMinimized()) entry.win.restore(); |
| 98 | entry.win.show(); |
| 99 | entry.win.focus(); |
| 100 | } |
| 101 | |
| 102 | close(hostKey: string): void { |
| 103 | this.entry(hostKey)?.win.close(); |
| 104 | } |
| 105 | |
| 106 | closeAll(): void { |
| 107 | for (const entry of this.windows.values()) { |
| 108 | if (!entry.win.isDestroyed()) entry.win.destroy(); |
| 109 | } |
| 110 | this.windows.clear(); |
| 111 | } |
| 112 | |
| 113 | private entry(hostKey: string): RemoteEntry | null { |
| 114 | const entry = this.windows.get(hostKey); |
| 115 | if (!entry) return null; |
| 116 | if (entry.win.isDestroyed()) { |
| 117 | this.windows.delete(hostKey); |
| 118 | return null; |
| 119 | } |
| 120 | return entry; |
| 121 | } |
| 122 | } |
| 123 |