chore: convert various JS to TS (#2062)

1 files changed, 721 insertions, 0 deletions

diff --git a/src/webview/contextMenuBuilder.ts b/src/webview/contextMenuBuilder.ts
new file mode 100644
index 000000000..fda5fa8b8
--- /dev/null
+++ b/src/webview/contextMenuBuilder.ts
@@ -0,0 +1,721 @@
+/**
+ * Context Menu builder.
+ *
+ * Based on "electron-spellchecker"'s  ContextMenuBuilder but customized for Ferdi
+ * and for usage with Electron's build-in spellchecker
+ *
+ * Source: https://github.com/electron-userland/electron-spellchecker/blob/master/src/context-menu-builder.js
+ */
+// eslint-disable-next-line no-unused-vars
+import { clipboard, ipcRenderer, nativeImage, WebContents } from 'electron';
+import { Menu, MenuItem } from '@electron/remote';
+import { cmdOrCtrlShortcutKey, isMac } from '../environment';
+
+import { SEARCH_ENGINE_NAMES, SEARCH_ENGINE_URLS } from '../config';
+import { openExternalUrl } from '../helpers/url-helpers';
+
+function matchesWord(string: string) {
+  const regex =
+    /[A-Za-z\u00AA\u00B5\u00BA\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u02C1\u02C6-\u02D1\u02E0-\u02E4\u02EC\u02EE\u0370-\u0374\u0376\u0377\u037A-\u037D\u0386\u0388-\u038A\u038C\u038E-\u03A1\u03A3-\u03F5\u03F7-\u0481\u048A-\u0527\u0531-\u0556\u0559\u0561-\u0587\u05D0-\u05EA\u05F0-\u05F2\u0620-\u064A\u066E\u066F\u0671-\u06D3\u06D5\u06E5\u06E6\u06EE\u06EF\u06FA-\u06FC\u06FF\u0710\u0712-\u072F\u074D-\u07A5\u07B1\u07CA-\u07EA\u07F4\u07F5\u07FA\u0800-\u0815\u081A\u0824\u0828\u0840-\u0858\u08A0\u08A2-\u08AC\u0904-\u0939\u093D\u0950\u0958-\u0961\u0971-\u0977\u0979-\u097F\u0985-\u098C\u098F\u0990\u0993-\u09A8\u09AA-\u09B0\u09B2\u09B6-\u09B9\u09BD\u09CE\u09DC\u09DD\u09DF-\u09E1\u09F0\u09F1\u0A05-\u0A0A\u0A0F\u0A10\u0A13-\u0A28\u0A2A-\u0A30\u0A32\u0A33\u0A35\u0A36\u0A38\u0A39\u0A59-\u0A5C\u0A5E\u0A72-\u0A74\u0A85-\u0A8D\u0A8F-\u0A91\u0A93-\u0AA8\u0AAA-\u0AB0\u0AB2\u0AB3\u0AB5-\u0AB9\u0ABD\u0AD0\u0AE0\u0AE1\u0B05-\u0B0C\u0B0F\u0B10\u0B13-\u0B28\u0B2A-\u0B30\u0B32\u0B33\u0B35-\u0B39\u0B3D\u0B5C\u0B5D\u0B5F-\u0B61\u0B71\u0B83\u0B85-\u0B8A\u0B8E-\u0B90\u0B92-\u0B95\u0B99\u0B9A\u0B9C\u0B9E\u0B9F\u0BA3\u0BA4\u0BA8-\u0BAA\u0BAE-\u0BB9\u0BD0\u0C05-\u0C0C\u0C0E-\u0C10\u0C12-\u0C28\u0C2A-\u0C33\u0C35-\u0C39\u0C3D\u0C58\u0C59\u0C60\u0C61\u0C85-\u0C8C\u0C8E-\u0C90\u0C92-\u0CA8\u0CAA-\u0CB3\u0CB5-\u0CB9\u0CBD\u0CDE\u0CE0\u0CE1\u0CF1\u0CF2\u0D05-\u0D0C\u0D0E-\u0D10\u0D12-\u0D3A\u0D3D\u0D4E\u0D60\u0D61\u0D7A-\u0D7F\u0D85-\u0D96\u0D9A-\u0DB1\u0DB3-\u0DBB\u0DBD\u0DC0-\u0DC6\u0E01-\u0E30\u0E32\u0E33\u0E40-\u0E46\u0E81\u0E82\u0E84\u0E87\u0E88\u0E8A\u0E8D\u0E94-\u0E97\u0E99-\u0E9F\u0EA1-\u0EA3\u0EA5\u0EA7\u0EAA\u0EAB\u0EAD-\u0EB0\u0EB2\u0EB3\u0EBD\u0EC0-\u0EC4\u0EC6\u0EDC-\u0EDF\u0F00\u0F40-\u0F47\u0F49-\u0F6C\u0F88-\u0F8C\u1000-\u102A\u103F\u1050-\u1055\u105A-\u105D\u1061\u1065\u1066\u106E-\u1070\u1075-\u1081\u108E\u10A0-\u10C5\u10C7\u10CD\u10D0-\u10FA\u10FC-\u1248\u124A-\u124D\u1250-\u1256\u1258\u125A-\u125D\u1260-\u1288\u128A-\u128D\u1290-\u12B0\u12B2-\u12B5\u12B8-\u12BE\u12C0\u12C2-\u12C5\u12C8-\u12D6\u12D8-\u1310\u1312-\u1315\u1318-\u135A\u1380-\u138F\u13A0-\u13F4\u1401-\u166C\u166F-\u167F\u1681-\u169A\u16A0-\u16EA\u1700-\u170C\u170E-\u1711\u1720-\u1731\u1740-\u1751\u1760-\u176C\u176E-\u1770\u1780-\u17B3\u17D7\u17DC\u1820-\u1877\u1880-\u18A8\u18AA\u18B0-\u18F5\u1900-\u191C\u1950-\u196D\u1970-\u1974\u1980-\u19AB\u19C1-\u19C7\u1A00-\u1A16\u1A20-\u1A54\u1AA7\u1B05-\u1B33\u1B45-\u1B4B\u1B83-\u1BA0\u1BAE\u1BAF\u1BBA-\u1BE5\u1C00-\u1C23\u1C4D-\u1C4F\u1C5A-\u1C7D\u1CE9-\u1CEC\u1CEE-\u1CF1\u1CF5\u1CF6\u1D00-\u1DBF\u1E00-\u1F15\u1F18-\u1F1D\u1F20-\u1F45\u1F48-\u1F4D\u1F50-\u1F57\u1F59\u1F5B\u1F5D\u1F5F-\u1F7D\u1F80-\u1FB4\u1FB6-\u1FBC\u1FBE\u1FC2-\u1FC4\u1FC6-\u1FCC\u1FD0-\u1FD3\u1FD6-\u1FDB\u1FE0-\u1FEC\u1FF2-\u1FF4\u1FF6-\u1FFC\u2071\u207F\u2090-\u209C\u2102\u2107\u210A-\u2113\u2115\u2119-\u211D\u2124\u2126\u2128\u212A-\u212D\u212F-\u2139\u213C-\u213F\u2145-\u2149\u214E\u2183\u2184\u2C00-\u2C2E\u2C30-\u2C5E\u2C60-\u2CE4\u2CEB-\u2CEE\u2CF2\u2CF3\u2D00-\u2D25\u2D27\u2D2D\u2D30-\u2D67\u2D6F\u2D80-\u2D96\u2DA0-\u2DA6\u2DA8-\u2DAE\u2DB0-\u2DB6\u2DB8-\u2DBE\u2DC0-\u2DC6\u2DC8-\u2DCE\u2DD0-\u2DD6\u2DD8-\u2DDE\u2E2F\u3005\u3006\u3031-\u3035\u303B\u303C\u3041-\u3096\u309D-\u309F\u30A1-\u30FA\u30FC-\u30FF\u3105-\u312D\u3131-\u318E\u31A0-\u31BA\u31F0-\u31FF\u3400-\u4DB5\u4E00-\u9FCC\uA000-\uA48C\uA4D0-\uA4FD\uA500-\uA60C\uA610-\uA61F\uA62A\uA62B\uA640-\uA66E\uA67F-\uA697\uA6A0-\uA6E5\uA717-\uA71F\uA722-\uA788\uA78B-\uA78E\uA790-\uA793\uA7A0-\uA7AA\uA7F8-\uA801\uA803-\uA805\uA807-\uA80A\uA80C-\uA822\uA840-\uA873\uA882-\uA8B3\uA8F2-\uA8F7\uA8FB\uA90A-\uA925\uA930-\uA946\uA960-\uA97C\uA984-\uA9B2\uA9CF\uAA00-\uAA28\uAA40-\uAA42\uAA44-\uAA4B\uAA60-\uAA76\uAA7A\uAA80-\uAAAF\uAAB1\uAAB5\uAAB6\uAAB9-\uAABD\uAAC0\uAAC2\uAADB-\uAADD\uAAE0-\uAAEA\uAAF2-\uAAF4\uAB01-\uAB06\uAB09-\uAB0E\uAB11-\uAB16\uAB20-\uAB26\uAB28-\uAB2E\uABC0-\uABE2\uAC00-\uD7A3\uD7B0-\uD7C6\uD7CB-\uD7FB\uF900-\uFA6D\uFA70-\uFAD9\uFB00-\uFB06\uFB13-\uFB17\uFB1D\uFB1F-\uFB28\uFB2A-\uFB36\uFB38-\uFB3C\uFB3E\uFB40\uFB41\uFB43\uFB44\uFB46-\uFBB1\uFBD3-\uFD3D\uFD50-\uFD8F\uFD92-\uFDC7\uFDF0-\uFDFB\uFE70-\uFE74\uFE76-\uFEFC\uFF21-\uFF3A\uFF41-\uFF5A\uFF66-\uFFBE\uFFC2-\uFFC7\uFFCA-\uFFCF\uFFD2-\uFFD7\uFFDA-\uFFDC]+/g;
+
+  return string.match(regex);
+}
+
+interface ContextMenuStringTable {
+  lookUpDefinition: ({ word }: { word: string }) => string;
+  cut: () => string;
+  copy: () => string;
+  paste: () => string;
+  pasteAndMatchStyle: () => string;
+  searchWith: ({ searchEngine }: { searchEngine: string }) => string;
+  openLinkUrl: () => string;
+  openLinkInFerdiUrl: () => string;
+  openInBrowser: () => string;
+  copyLinkUrl: () => string;
+  copyImageUrl: () => string;
+  copyImage: () => string;
+  downloadImage: () => string;
+  addToDictionary: () => string;
+  goBack: () => string;
+  goForward: () => string;
+  copyPageUrl: () => string;
+  goToHomePage: () => string;
+  copyMail: () => string;
+  inspectElement: () => string;
+}
+
+// TODO: Need to externalize for i18n
+const contextMenuStringTable: ContextMenuStringTable = {
+  lookUpDefinition: ({ word }) => `Look Up "${word}"`,
+  cut: () => 'Cut',
+  copy: () => 'Copy',
+  paste: () => 'Paste',
+  pasteAndMatchStyle: () => 'Paste and match style',
+  searchWith: ({ searchEngine }) => `Search with ${searchEngine}`,
+  openLinkUrl: () => 'Open Link',
+  openLinkInFerdiUrl: () => 'Open Link in Ferdi',
+  openInBrowser: () => 'Open in Browser',
+  copyLinkUrl: () => 'Copy Link',
+  copyImageUrl: () => 'Copy Image Address',
+  copyImage: () => 'Copy Image',
+  downloadImage: () => 'Download Image',
+  addToDictionary: () => 'Add to Dictionary',
+  goBack: () => 'Go Back',
+  goForward: () => 'Go Forward',
+  copyPageUrl: () => 'Copy Page URL',
+  goToHomePage: () => 'Go to Home Page',
+  copyMail: () => 'Copy Email Address',
+  inspectElement: () => 'Inspect Element',
+};
+
+/**
+ * ContextMenuBuilder creates context menus based on the content clicked - this
+ * information is derived from
+ * https://github.com/electron/electron/blob/master/docs/api/web-contents.md#event-context-menu,
+ * which we use to generate the menu. We also use the spell-check information to
+ * generate suggestions.
+ */
+export class ContextMenuBuilder {
+  debugMode: boolean;
+
+  processMenu: (
+    menu: Electron.CrossProcessExports.Menu,
+  ) => Electron.CrossProcessExports.Menu;
+
+  menu: Electron.CrossProcessExports.Menu | null;
+
+  stringTable: ContextMenuStringTable;
+
+  getWebContents: () => Electron.WebContents;
+
+  /**
+   * Creates an instance of ContextMenuBuilder
+   *
+   * @param webContents Current webContents
+   * @param debugMode If true, display the "Inspect Element" menu item.
+   * @param processMenu If passed, this method will be passed the menu to change it prior to display. Signature: (menu, info) => menu
+   */
+  constructor(
+    webContents: WebContents,
+    debugMode: boolean = false,
+    processMenu = (menu: Electron.CrossProcessExports.Menu) => menu,
+  ) {
+    this.debugMode = debugMode;
+    this.processMenu = processMenu;
+    this.menu = null;
+    this.stringTable = { ...contextMenuStringTable };
+    this.getWebContents = () => webContents;
+  }
+
+  /**
+   * Specify alternate string formatter for each context menu.
+   * String table consist of string formatter as function instead per each context menu item,
+   * allows to change string in runtime. All formatters are simply typeof () => string, except
+   * lookUpDefinition provides word, ({word}) => string.
+   *
+   * @param stringTable The object contains string formatter function for context menu.
+   * It is allowed to specify only certain menu string as necessary, which will makes other string
+   * fall backs to default.
+   */
+  setAlternateStringFormatter(stringTable: ContextMenuStringTable) {
+    this.stringTable = Object.assign(this.stringTable, stringTable);
+  }
+
+  /**
+   * Shows a popup menu given the information returned from the context-menu
+   * event. This is probably the only method you need to call in this class.
+   *
+   * @param contextInfo The object returned from the 'context-menu' Electron event.
+   */
+  async showPopupMenu(contextInfo: Electron.ContextMenuParams): Promise<void> {
+    const menu = await this.buildMenuForElement(contextInfo);
+    if (!menu) return;
+    menu.popup();
+  }
+
+  /**
+   * Builds a context menu specific to the given info that _would_ be shown
+   * immediately by {{showPopupMenu}}. Use this to add your own menu items to
+   * the list but use most of the default behavior.
+   */
+  async buildMenuForElement(
+    info: Electron.ContextMenuParams,
+  ): Promise<Electron.CrossProcessExports.Menu> {
+    if (info.linkURL && info.linkURL.length > 0) {
+      return this.buildMenuForLink(info);
+    }
+
+    if (info.hasImageContents && info.srcURL && info.srcURL.length > 1) {
+      return this.buildMenuForImage(info);
+    }
+
+    if (
+      info.isEditable ||
+      (info.inputFieldType && info.inputFieldType !== 'none')
+    ) {
+      return this.buildMenuForTextInput(info);
+    }
+
+    return this.buildMenuForText(info);
+  }
+
+  /**
+   * Builds a menu applicable to a text input field.
+   *
+   * @return {Menu}  The `Menu`
+   */
+  buildMenuForTextInput(
+    menuInfo: Electron.ContextMenuParams,
+  ): Electron.CrossProcessExports.Menu {
+    const menu = new Menu();
+
+    this.addSpellingItems(menu, menuInfo);
+    this.addSearchItems(menu, menuInfo);
+
+    this.addCut(menu, menuInfo);
+    this.addCopy(menu, menuInfo);
+    this.addPaste(menu, menuInfo);
+    this.addPastePlain(menu, menuInfo);
+    this.addInspectElement(menu, menuInfo);
+    // @ts-expect-error Expected 1 arguments, but got 2.
+    this.processMenu(menu, menuInfo);
+
+    // @ts-expect-error Expected 2 arguments, but got 1.
+    this.copyPageUrl(menu);
+    this.goToHomePage(menu, menuInfo);
+    this.openInBrowser(menu, menuInfo);
+
+    return menu;
+  }
+
+  /**
+   * Builds a menu applicable to a link element.
+   *
+   * @return {Menu}  The `Menu`
+   */
+  buildMenuForLink(
+    menuInfo: Electron.ContextMenuParams,
+  ): Electron.CrossProcessExports.Menu {
+    const menu = new Menu();
+    const isEmailAddress = menuInfo.linkURL.startsWith('mailto:');
+
+    const copyLink = new MenuItem({
+      label: isEmailAddress
+        ? this.stringTable.copyMail()
+        : this.stringTable.copyLinkUrl(),
+      click: () => {
+        // Omit the mailto: portion of the link; we just want the address
+        const url = isEmailAddress ? menuInfo.linkText : menuInfo.linkURL;
+        clipboard.writeText(url);
+        this._sendNotificationOnClipboardEvent(
+          // @ts-expect-error Property 'clipboardNotifications' does not exist on type 'ContextMenuParams'.
+          menuInfo.clipboardNotifications,
+          () => `Link URL copied: ${url}`,
+        );
+      },
+    });
+
+    const openLink = new MenuItem({
+      label: this.stringTable.openLinkUrl(),
+      click: () => {
+        openExternalUrl(menuInfo.linkURL, true);
+      },
+    });
+
+    const openInFerdiLink = new MenuItem({
+      label: this.stringTable.openLinkInFerdiUrl(),
+      click: () => {
+        window.location.href = menuInfo.linkURL;
+      },
+    });
+
+    menu.append(copyLink);
+    menu.append(openLink);
+    menu.append(openInFerdiLink);
+
+    if (this.isSrcUrlValid(menuInfo)) {
+      this.addSeparator(menu);
+      this.addImageItems(menu, menuInfo);
+    }
+
+    this.addInspectElement(menu, menuInfo);
+    // @ts-expect-error Expected 1 arguments, but got 2.
+    this.processMenu(menu, menuInfo);
+
+    this.addSeparator(menu);
+    this.goBack(menu);
+    this.goForward(menu);
+    // @ts-expect-error Expected 2 arguments, but got 1.
+    this.copyPageUrl(menu);
+    this.goToHomePage(menu, menuInfo);
+    this.openInBrowser(menu, menuInfo);
+
+    return menu;
+  }
+
+  /**
+   * Builds a menu applicable to a text field.
+   */
+  buildMenuForText(
+    menuInfo: Electron.ContextMenuParams,
+  ): Electron.CrossProcessExports.Menu {
+    const menu = new Menu();
+
+    this.addSearchItems(menu, menuInfo);
+    this.addCopy(menu, menuInfo);
+    this.addInspectElement(menu, menuInfo);
+    // @ts-expect-error Expected 1 arguments, but got 2.
+    this.processMenu(menu, menuInfo);
+
+    this.addSeparator(menu);
+    this.goBack(menu);
+    this.goForward(menu);
+    this.copyPageUrl(menu, menuInfo);
+    this.goToHomePage(menu, menuInfo);
+    this.openInBrowser(menu, menuInfo);
+
+    return menu;
+  }
+
+  /**
+   * Builds a menu applicable to an image.
+   *
+   * @return {Menu}  The `Menu`
+   */
+  buildMenuForImage(
+    menuInfo: Electron.ContextMenuParams,
+  ): Electron.CrossProcessExports.Menu {
+    const menu = new Menu();
+
+    if (this.isSrcUrlValid(menuInfo)) {
+      this.addImageItems(menu, menuInfo);
+    }
+    this.addInspectElement(menu, menuInfo);
+    // @ts-expect-error Expected 1 arguments, but got 2.
+    this.processMenu(menu, menuInfo);
+
+    return menu;
+  }
+
+  /**
+   * Checks if the current text selection contains a single misspelled word and
+   * if so, adds suggested spellings as individual menu items.
+   */
+  addSpellingItems(
+    menu: Electron.CrossProcessExports.Menu,
+    menuInfo: Electron.ContextMenuParams,
+  ) {
+    const webContents = this.getWebContents();
+    // Add each spelling suggestion
+    for (const suggestion of menuInfo.dictionarySuggestions) {
+      menu.append(
+        new MenuItem({
+          label: suggestion,
+          // eslint-disable-next-line no-loop-func
+          click: () => webContents.replaceMisspelling(suggestion),
+        }),
+      );
+    }
+
+    // Allow users to add the misspelled word to the dictionary
+    if (menuInfo.misspelledWord) {
+      menu.append(
+        new MenuItem({
+          label: this.stringTable.addToDictionary(),
+          click: () =>
+            webContents.session.addWordToSpellCheckerDictionary(
+              menuInfo.misspelledWord,
+            ),
+        }),
+      );
+    }
+
+    return menu;
+  }
+
+  /**
+   * Adds search-related menu items.
+   */
+  addSearchItems(
+    menu: Electron.CrossProcessExports.Menu,
+    menuInfo: Electron.ContextMenuParams,
+  ) {
+    if (!menuInfo.selectionText || menuInfo.selectionText.length === 0) {
+      return menu;
+    }
+
+    const match = matchesWord(menuInfo.selectionText);
+    if (!match || match.length === 0) {
+      return menu;
+    }
+
+    if (isMac) {
+      const webContents = this.getWebContents();
+
+      const lookUpDefinition = new MenuItem({
+        label: this.stringTable.lookUpDefinition({
+          word: menuInfo.selectionText.trim(),
+        }),
+        click: () => webContents.showDefinitionForSelection(),
+      });
+
+      menu.append(lookUpDefinition);
+    }
+
+    const search = new MenuItem({
+      label: this.stringTable.searchWith({
+        // @ts-expect-error Property 'searchEngine' does not exist on type 'ContextMenuParams'.
+        searchEngine: SEARCH_ENGINE_NAMES[menuInfo.searchEngine],
+      }),
+      click: () => {
+        // @ts-expect-error Property 'searchEngine' does not exist on type 'ContextMenuParams'.
+        const url = SEARCH_ENGINE_URLS[menuInfo.searchEngine]({
+          searchTerm: encodeURIComponent(menuInfo.selectionText),
+        });
+        openExternalUrl(url, true);
+      },
+    });
+
+    menu.append(search);
+    this.addSeparator(menu);
+
+    return menu;
+  }
+
+  isSrcUrlValid(menuInfo: Electron.ContextMenuParams) {
+    return menuInfo.srcURL && menuInfo.srcURL.length > 0;
+  }
+
+  /**
+   * Adds "Copy Image" and "Copy Image URL" items when `src` is valid.
+   */
+  addImageItems(
+    menu: Electron.CrossProcessExports.Menu,
+    menuInfo: Electron.ContextMenuParams,
+  ) {
+    const copyImage = new MenuItem({
+      label: this.stringTable.copyImage(),
+      click: () => {
+        const result = this.convertImageToBase64(
+          menuInfo.srcURL,
+          (dataURL: string) =>
+            clipboard.writeImage(nativeImage.createFromDataURL(dataURL)),
+        );
+
+        this._sendNotificationOnClipboardEvent(
+          // @ts-expect-error Property 'clipboardNotifications' does not exist on type 'ContextMenuParams'.
+          menuInfo.clipboardNotifications,
+          () => `Image copied from URL: ${menuInfo.srcURL}`,
+        );
+        return result;
+      },
+    });
+
+    menu.append(copyImage);
+
+    const copyImageUrl = new MenuItem({
+      label: this.stringTable.copyImageUrl(),
+      click: () => {
+        const result = clipboard.writeText(menuInfo.srcURL);
+        this._sendNotificationOnClipboardEvent(
+          // @ts-expect-error Property 'clipboardNotifications' does not exist on type 'ContextMenuParams'.
+          menuInfo.clipboardNotifications,
+          () => `Image URL copied: ${menuInfo.srcURL}`,
+        );
+        return result;
+      },
+    });
+
+    menu.append(copyImageUrl);
+
+    // TODO: This doesn't seem to work on linux, so, limiting to Mac for now
+    if (isMac && menuInfo.srcURL.startsWith('blob:')) {
+      const downloadImage = new MenuItem({
+        label: this.stringTable.downloadImage(),
+        click: () => {
+          const urlWithoutBlob = menuInfo.srcURL.slice(5);
+          this.convertImageToBase64(menuInfo.srcURL, (dataURL: any) => {
+            const url = new window.URL(urlWithoutBlob);
+            const fileName = url.pathname.slice(1);
+            ipcRenderer.send('download-file', {
+              content: dataURL,
+              fileOptions: {
+                name: fileName,
+                mime: 'image/png',
+              },
+            });
+          });
+          this._sendNotificationOnClipboardEvent(
+            // @ts-expect-error Property 'clipboardNotifications' does not exist on type 'ContextMenuParams'.
+            menuInfo.clipboardNotifications,
+            () => `Image downloaded: ${urlWithoutBlob}`,
+          );
+        },
+      });
+
+      menu.append(downloadImage);
+    }
+
+    return menu;
+  }
+
+  /**
+   * Adds the Cut menu item
+   */
+  addCut(
+    menu: Electron.CrossProcessExports.Menu,
+    menuInfo: Electron.ContextMenuParams,
+  ) {
+    const webContents = this.getWebContents();
+    menu.append(
+      new MenuItem({
+        label: this.stringTable.cut(),
+        accelerator: `${cmdOrCtrlShortcutKey()}+X`,
+        enabled: menuInfo.editFlags.canCut,
+        click: () => webContents.cut(),
+      }),
+    );
+
+    return menu;
+  }
+
+  /**
+   * Adds the Copy menu item.
+   */
+  addCopy(
+    menu: Electron.CrossProcessExports.Menu,
+    menuInfo: Electron.ContextMenuParams,
+  ) {
+    const webContents = this.getWebContents();
+    menu.append(
+      new MenuItem({
+        label: this.stringTable.copy(),
+        accelerator: `${cmdOrCtrlShortcutKey()}+C`,
+        enabled: menuInfo.editFlags.canCopy,
+        click: () => webContents.copy(),
+      }),
+    );
+
+    return menu;
+  }
+
+  /**
+   * Adds the Paste menu item.
+   */
+  addPaste(
+    menu: Electron.CrossProcessExports.Menu,
+    menuInfo: Electron.ContextMenuParams,
+  ) {
+    const webContents = this.getWebContents();
+    menu.append(
+      new MenuItem({
+        label: this.stringTable.paste(),
+        accelerator: `${cmdOrCtrlShortcutKey()}+V`,
+        enabled: menuInfo.editFlags.canPaste,
+        click: () => webContents.paste(),
+      }),
+    );
+
+    return menu;
+  }
+
+  addPastePlain(
+    menu: Electron.CrossProcessExports.Menu,
+    menuInfo: Electron.ContextMenuParams,
+  ) {
+    if (
+      menuInfo.editFlags.canPaste &&
+      !menuInfo.linkText &&
+      !menuInfo.hasImageContents
+    ) {
+      const webContents = this.getWebContents();
+      menu.append(
+        new MenuItem({
+          label: this.stringTable.pasteAndMatchStyle(),
+          accelerator: `${cmdOrCtrlShortcutKey()}+Shift+V`,
+          click: () => webContents.pasteAndMatchStyle(),
+        }),
+      );
+    }
+  }
+
+  /**
+   * Adds a separator item.
+   */
+  addSeparator(menu: Electron.CrossProcessExports.Menu) {
+    menu.append(new MenuItem({ type: 'separator' }));
+    return menu;
+  }
+
+  /**
+   * Adds the "Inspect Element" menu item.
+   */
+  addInspectElement(
+    menu: Electron.CrossProcessExports.Menu,
+    menuInfo: Electron.ContextMenuParams,
+    needsSeparator = true,
+  ) {
+    const webContents = this.getWebContents();
+    if (!this.debugMode) return menu;
+    if (needsSeparator) this.addSeparator(menu);
+
+    const inspect = new MenuItem({
+      label: this.stringTable.inspectElement(),
+      click: () => webContents.inspectElement(menuInfo.x, menuInfo.y),
+    });
+
+    menu.append(inspect);
+    return menu;
+  }
+
+  /**
+   * Converts an image to a base-64 encoded string.
+   *
+   * @param  {String} url           The image URL
+   * @param  {Function} callback    A callback that will be invoked with the result
+   * @param  {String} outputFormat  The image format to use, defaults to 'image/png'
+   */
+  convertImageToBase64(
+    url: string,
+    callback: {
+      (dataURL: any): void;
+      (dataURL: any): void;
+      (arg0: string): void;
+    },
+    outputFormat: string = 'image/png',
+  ) {
+    let canvas: HTMLCanvasElement | null = document.createElement('canvas');
+    const ctx = canvas.getContext('2d');
+    const img = new Image();
+    img.crossOrigin = 'Anonymous';
+
+    img.addEventListener('load', () => {
+      if (canvas) {
+        canvas.height = img.height;
+        canvas.width = img.width;
+        ctx?.drawImage(img, 0, 0);
+
+        const dataURL = canvas.toDataURL(outputFormat);
+        canvas = null;
+        callback(dataURL);
+      }
+    });
+
+    img.src = url;
+  }
+
+  /**
+   * Adds the 'go back' menu item
+   */
+  goBack(menu: Electron.CrossProcessExports.Menu) {
+    const webContents = this.getWebContents();
+    menu.append(
+      new MenuItem({
+        label: this.stringTable.goBack(),
+        accelerator: `${cmdOrCtrlShortcutKey()}+left`,
+        enabled: webContents.canGoBack(),
+        click: () => webContents.goBack(),
+      }),
+    );
+
+    return menu;
+  }
+
+  /**
+   * Adds the 'go forward' menu item
+   */
+  goForward(menu: Electron.CrossProcessExports.Menu) {
+    const webContents = this.getWebContents();
+    menu.append(
+      new MenuItem({
+        label: this.stringTable.goForward(),
+        accelerator: `${cmdOrCtrlShortcutKey()}+right`,
+        enabled: webContents.canGoForward(),
+        click: () => webContents.goForward(),
+      }),
+    );
+
+    return menu;
+  }
+
+  /**
+   * Adds the 'copy page url' menu item.
+   */
+  copyPageUrl(
+    menu: Electron.CrossProcessExports.Menu,
+    menuInfo: Electron.ContextMenuParams,
+  ) {
+    menu.append(
+      new MenuItem({
+        label: this.stringTable.copyPageUrl(),
+        enabled: true,
+        click: () => {
+          clipboard.writeText(window.location.href);
+          this._sendNotificationOnClipboardEvent(
+            // @ts-expect-error Property 'clipboardNotifications' does not exist on type 'ContextMenuParams'.
+            menuInfo?.clipboardNotifications,
+            () => `Page URL copied: ${window.location.href}`,
+          );
+        },
+      }),
+    );
+
+    return menu;
+  }
+
+  /**
+   * Adds the 'go to home' menu item.
+   */
+  goToHomePage(
+    menu: Electron.CrossProcessExports.Menu,
+    menuInfo: Electron.ContextMenuParams,
+  ) {
+    const baseURL = new window.URL(menuInfo.pageURL);
+    menu.append(
+      new MenuItem({
+        label: this.stringTable.goToHomePage(),
+        accelerator: `${cmdOrCtrlShortcutKey()}+Home`,
+        enabled: true,
+        click: () => {
+          // webContents.loadURL(baseURL.origin);
+          window.location.href = baseURL.origin;
+        },
+      }),
+    );
+
+    return menu;
+  }
+
+  /**
+   * Adds the 'open in browser' menu item.
+   */
+  openInBrowser(
+    menu: Electron.CrossProcessExports.Menu,
+    menuInfo: Electron.ContextMenuParams,
+  ) {
+    menu.append(
+      new MenuItem({
+        label: this.stringTable.openInBrowser(),
+        enabled: true,
+        click: () => {
+          openExternalUrl(menuInfo.pageURL, true);
+        },
+      }),
+    );
+
+    return menu;
+  }
+
+  _sendNotificationOnClipboardEvent(
+    isDisabled: boolean,
+    notificationText: () => string,
+  ) {
+    if (isDisabled) {
+      return;
+    }
+    // eslint-disable-next-line no-new
+    new window.Notification('Data copied into Clipboard', {
+      body: notificationText(),
+    });
+  }
+}