Move PDFSinglePageViewer into the web/pdf_viewer.js file

With the previous commit, both of the `PDFViewer` and `PDFSinglePageViewer` clases are now small/simple enough that it no longer seems necessary to keep them in separate files.

web/pdf_single_page_viewer.js

@@ -1,37 +0,0 @@
-/* Copyright 2017 Mozilla Foundation
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-import { ScrollMode, SpreadMode } from "./ui_utils.js";
-import { BaseViewer } from "./base_viewer.js";
-
-class PDFSinglePageViewer extends BaseViewer {
-  _resetView() {
-    super._resetView();
-    this._scrollMode = ScrollMode.PAGE;
-    this._spreadMode = SpreadMode.NONE;
-  }
-
-  // eslint-disable-next-line accessor-pairs
-  set scrollMode(mode) {}
-
-  _updateScrollMode() {}
-
-  // eslint-disable-next-line accessor-pairs
-  set spreadMode(mode) {}
-
-  _updateSpreadMode() {}
-}
-
-export { PDFSinglePageViewer };

web/pdf_viewer.component.js

@@ -31,6 +31,7 @@ import {
 } from "./xfa_layer_builder.js";
 import { EventBus, ProgressBar } from "./ui_utils.js";
 import { PDFLinkService, SimpleLinkService } from "./pdf_link_service.js";
+import { PDFSinglePageViewer, PDFViewer } from "./pdf_viewer.js";
 import { DownloadManager } from "./download_manager.js";
 import { GenericL10n } from "./genericl10n.js";
 import { NullL10n } from "./l10n_utils.js";
@@ -38,8 +39,6 @@ import { PDFFindController } from "./pdf_find_controller.js";
 import { PDFHistory } from "./pdf_history.js";
 import { PDFPageView } from "./pdf_page_view.js";
 import { PDFScriptingManager } from "./pdf_scripting_manager.js";
-import { PDFSinglePageViewer } from "./pdf_single_page_viewer.js";
-import { PDFViewer } from "./pdf_viewer.js";
 
 // eslint-disable-next-line no-unused-vars
 const pdfjsVersion = PDFJSDev.eval("BUNDLE_VERSION");

web/pdf_viewer.js

@@ -13,8 +13,27 @@
  * limitations under the License.
  */
 
+import { ScrollMode, SpreadMode } from "./ui_utils.js";
 import { BaseViewer } from "./base_viewer.js";
 
 class PDFViewer extends BaseViewer {}
 
-export { PDFViewer };
+class PDFSinglePageViewer extends BaseViewer {
+  _resetView() {
+    super._resetView();
+    this._scrollMode = ScrollMode.PAGE;
+    this._spreadMode = SpreadMode.NONE;
+  }
+
+  // eslint-disable-next-line accessor-pairs
+  set scrollMode(mode) {}
+
+  _updateScrollMode() {}
+
+  // eslint-disable-next-line accessor-pairs
+  set spreadMode(mode) {}
+
+  _updateSpreadMode() {}
+}
+
+export { PDFSinglePageViewer, PDFViewer };

web/secondary_toolbar.js

@@ -15,7 +15,7 @@
 
 import { SCROLLBAR_PADDING, ScrollMode, SpreadMode } from "./ui_utils.js";
 import { CursorTool } from "./pdf_cursor_tools.js";
-import { PDFSinglePageViewer } from "./pdf_single_page_viewer.js";
+import { PDFSinglePageViewer } from "./pdf_viewer.js";
 
 /**
  * @typedef {Object} SecondaryToolbarOptions