refactor: re-implement desktop-capturer in TypeScript (#18580)

lib/renderer/api/desktop-capturer.js

@@ -1,42 +0,0 @@
-'use strict'
-
-const { nativeImage, deprecate } = require('electron')
-const ipcRendererUtils = require('@electron/internal/renderer/ipc-renderer-internal-utils')
-
-// |options.types| can't be empty and must be an array
-function isValid (options) {
-  const types = options ? options.types : undefined
-  return Array.isArray(types)
-}
-
-function mapSources (sources) {
-  return sources.map(source => ({
-    id: source.id,
-    name: source.name,
-    thumbnail: nativeImage.createFromDataURL(source.thumbnail),
-    display_id: source.display_id,
-    appIcon: source.appIcon ? nativeImage.createFromDataURL(source.appIcon) : null
-  }))
-}
-
-exports.getSources = (options) => {
-  return new Promise((resolve, reject) => {
-    if (!isValid(options)) throw new Error('Invalid options')
-
-    const captureWindow = options.types.includes('window')
-    const captureScreen = options.types.includes('screen')
-
-    if (options.thumbnailSize == null) {
-      options.thumbnailSize = {
-        width: 150,
-        height: 150
-      }
-    }
-    if (options.fetchWindowIcons == null) {
-      options.fetchWindowIcons = false
-    }
-
-    ipcRendererUtils.invoke('ELECTRON_BROWSER_DESKTOP_CAPTURER_GET_SOURCES', captureWindow, captureScreen, options.thumbnailSize, options.fetchWindowIcons)
-      .then(sources => resolve(mapSources(sources)), reject)
-  })
-}

lib/renderer/api/desktop-capturer.ts

@@ -0,0 +1,33 @@
+import { nativeImage } from 'electron'
+import * as ipcRendererUtils from '@electron/internal/renderer/ipc-renderer-internal-utils'
+
+// |options.types| can't be empty and must be an array
+function isValid (options: Electron.SourcesOptions) {
+  const types = options ? options.types : undefined
+  return Array.isArray(types)
+}
+
+export async function getSources (options: Electron.SourcesOptions) {
+  if (!isValid(options)) throw new Error('Invalid options')
+
+  const captureWindow = options.types.includes('window')
+  const captureScreen = options.types.includes('screen')
+
+  const { thumbnailSize = { width: 150, height: 150 } } = options
+  const { fetchWindowIcons = false } = options
+
+  const sources = await ipcRendererUtils.invoke<ElectronInternal.GetSourcesResult[]>('ELECTRON_BROWSER_DESKTOP_CAPTURER_GET_SOURCES', {
+    captureWindow,
+    captureScreen,
+    thumbnailSize,
+    fetchWindowIcons
+  } as ElectronInternal.GetSourcesOptions)
+
+  return sources.map(source => ({
+    id: source.id,
+    name: source.name,
+    thumbnail: nativeImage.createFromDataURL(source.thumbnail),
+    display_id: source.display_id,
+    appIcon: source.appIcon ? nativeImage.createFromDataURL(source.appIcon) : null
+  }))
+}