JAVASCRIPT navigator.plugins.js

log("loading navigator.plugins.js");

const data = {
  mimeTypes: [
    {
      type: "application/pdf",
      suffixes: "pdf",
      description: "",
      __pluginName: "Chrome PDF Viewer"
    },
    {
      type: "application/x-google-chrome-pdf",
      suffixes: "pdf",
      description: "Portable Document Format",
      __pluginName: "Chrome PDF Plugin"
    },
    {
      type: "application/x-nacl",
      suffixes: "",
      description: "Native Client Executable",
      __pluginName: "Native Client"
    },
    {
      type: "application/x-pnacl",
      suffixes: "",
      description: "Portable Native Client Executable",
      __pluginName: "Native Client"
    }
  ],
  plugins: [
    {
      name: "Chrome PDF Plugin",
      filename: "internal-pdf-viewer",
      description: "Portable Document Format",
      __mimeTypes: ["application/x-google-chrome-pdf"]
    },
    {
      name: "Chrome PDF Viewer",
      filename: "mhjfbmdgcfjbbpaeojofohoefgiehjai",
      description: "",
      __mimeTypes: ["application/pdf"]
    },
    {
      name: "Native Client",
      filename: "internal-nacl-plugin",
      description: "",
      __mimeTypes: ["application/x-nacl", "application/x-pnacl"]
    }
  ]
};

// That means we're running headful
const hasPlugins = "plugins" in navigator && navigator.plugins.length;
if (!hasPlugins) {
  const mimeTypes = generateMagicArray(data.mimeTypes, MimeTypeArray.prototype,
    MimeType.prototype, "type");
  const plugins = generateMagicArray(data.plugins, PluginArray.prototype,
    Plugin.prototype, "name");

  // Plugin and MimeType cross-reference each other, let's do that now
  // Note: We're looping through `data.plugins` here, not the generated `plugins`
  for (const pluginData of data.plugins) {
    pluginData.__mimeTypes.forEach((type, index) => {
      plugins[pluginData.name][index] = mimeTypes[type];
      plugins[type] = mimeTypes[type];
      Object.defineProperty(mimeTypes[type], "enabledPlugin", {
        value: JSON.parse(JSON.stringify(plugins[pluginData.name])),
        writable: false,
        enumerable: false, // Important: `JSON.stringify(navigator.plugins)`
        configurable: false
      });
    });
  }

  const patchNavigator = (name, value) =>
    utils.replaceProperty(Object.getPrototypeOf(navigator), name, {
      get() {
        return value;
      }
    });

  patchNavigator("mimeTypes", mimeTypes);
  patchNavigator("plugins", plugins);
}