Convert globalScope and isNodeJS to proper modules

Slightly unrelated to the rest of the patch, but this also removes an out-of-place `globals` definition from the `web/viewer.js` file.

src/core/worker.js

@@ -21,7 +21,7 @@ import {
 } from '../shared/util';
 import { clearPrimitiveCaches, Ref } from './primitives';
 import { LocalPdfManager, NetworkPdfManager } from './pdf_manager';
-import isNodeJS from '../shared/is_node';
+import { isNodeJS } from '../shared/is_node';
 import { MessageHandler } from '../shared/message_handler';
 import { PDFWorkerStream } from './worker_stream';
 import { XRefParseException } from './core_utils';

src/display/api.js

@@ -33,7 +33,7 @@ import {
 import { FontFaceObject, FontLoader } from './font_loader';
 import { apiCompatibilityParams } from './api_compatibility';
 import { CanvasGraphics } from './canvas';
-import globalScope from '../shared/global_scope';
+import { globalScope } from '../shared/global_scope';
 import { GlobalWorkerOptions } from './worker_options';
 import { MessageHandler } from '../shared/message_handler';
 import { Metadata } from './metadata';

src/display/api_compatibility.js

@@ -15,7 +15,7 @@
 
 let compatibilityParams = Object.create(null);
 if (typeof PDFJSDev === 'undefined' || PDFJSDev.test('GENERIC')) {
-  const isNodeJS = require('../shared/is_node');
+  const { isNodeJS, } = require('../shared/is_node');
 
   const userAgent =
     (typeof navigator !== 'undefined' && navigator.userAgent) || '';

src/display/svg.js

@@ -20,7 +20,7 @@ import {
   TextRenderingMode, Util, warn
 } from '../shared/util';
 import { DOMSVGFactory } from './display_utils';
-import isNodeJS from '../shared/is_node';
+import { isNodeJS } from '../shared/is_node';
 
 let SVGGraphics = function() {
   throw new Error('Not implemented: SVGGraphics');

src/display/text_layer.js

@@ -14,7 +14,7 @@
  */
 
 import { AbortException, createPromiseCapability, Util } from '../shared/util';
-import globalScope from '../shared/global_scope';
+import { globalScope } from '../shared/global_scope';
 
 /**
  * Text layer render parameters.

src/pdf.js

@@ -31,7 +31,7 @@ let pdfjsDisplayWorkerOptions = require('./display/worker_options.js');
 let pdfjsDisplayAPICompatibility = require('./display/api_compatibility.js');
 
 if (typeof PDFJSDev === 'undefined' || PDFJSDev.test('GENERIC')) {
-  const isNodeJS = require('./shared/is_node.js');
+  const { isNodeJS, } = require('./shared/is_node.js');
   if (isNodeJS()) {
     let PDFNodeStream = require('./display/node_stream.js').PDFNodeStream;
     pdfjsDisplayAPI.setPDFNetworkStreamFactory((params) => {

src/shared/compatibility.js

@@ -14,7 +14,7 @@
  */
 /* eslint no-var: error */
 
-const globalScope = require('./global_scope');
+const { globalScope, } = require('./global_scope');
 
 // Skip compatibility checks for modern builds and if we already ran the module.
 if ((typeof PDFJSDev === 'undefined' || !PDFJSDev.test('SKIP_BABEL')) &&
@@ -22,7 +22,7 @@ if ((typeof PDFJSDev === 'undefined' || !PDFJSDev.test('SKIP_BABEL')) &&
 
 globalScope._pdfjsCompatibilityChecked = true;
 
-const isNodeJS = require('./is_node');
+const { isNodeJS, } = require('./is_node');
 
 const hasDOM = typeof window === 'object' && typeof document === 'object';
 

src/shared/global_scope.js

@@ -12,10 +12,13 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-/* globals module */
 
-module.exports =
+const globalScope =
   (typeof window !== 'undefined' && window.Math === Math) ? window :
   // eslint-disable-next-line no-undef
   (typeof global !== 'undefined' && global.Math === Math) ? global :
   (typeof self !== 'undefined' && self.Math === Math) ? self : {};
+
+export {
+  globalScope,
+};

src/shared/is_node.js

@@ -12,13 +12,17 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-/* globals module, process */
+/* globals process */
 
-module.exports = function isNodeJS() {
+function isNodeJS() {
   // NW.js / Electron is a browser context, but copies some Node.js objects; see
   // http://docs.nwjs.io/en/latest/For%20Users/Advanced/JavaScript%20Contexts%20in%20NW.js/#access-nodejs-and-nwjs-api-in-browser-context
   // https://electronjs.org/docs/api/process#processversionselectron
   return typeof process === 'object' &&
          process + '' === '[object process]' &&
          !process.versions['nw'] && !process.versions['electron'];
+}
+
+export {
+  isNodeJS,
 };