[api-minor] Remove the textHighlighterFactory in the viewer

Please note that this functionality has never really mattered for the Firefox PDF Viewer, the GENERIC viewer, or even the "simpleviewer"/"singlepageviewer" component-examples. Hence, in practice this means that only the "pageviewer" component-example[1] have ever really utilized this.

Using factories to initialize various layers in the viewer, rather than simply invoking the relevant code directly, seems (at least to me) like a somewhat roundabout way of doing things.
Not only does this lead to more code, both to write and maintain, but since many of the layers have common parameters (e.g. an `AnnotationStorage`-instance) there's also some duplication.

Hence this patch, which removes the `textHighlighterFactory` and instead uses a lookup-function in the `PDFPageView`-class to access the external viewer-properties as necessary.
Note that this should even be an improvement for the "pageviewer" component-example, since most layers will now work by default rather than require manual configuration.

---
[1] In practice we generally suggest using the "simpleviewer", or "singlepageviewer", since it does *most* things out-of-the-box and given that a lot of functionality really require *a viewer* and not just a single page in order to work.

web/pdf_page_view.js

@@ -53,6 +53,7 @@ import { NullL10n } from "./l10n_utils.js";
 import { SimpleLinkService } from "./pdf_link_service.js";
 import { StructTreeLayerBuilder } from "./struct_tree_layer_builder.js";
 import { TextAccessibilityManager } from "./text_accessibility.js";
+import { TextHighlighter } from "./text_highlighter.js";
 
 /**
  * @typedef {Object} PDFPageViewOptions
@@ -75,7 +76,6 @@ import { TextAccessibilityManager } from "./text_accessibility.js";
  *   see also {@link RenderParameters} and {@link GetOperatorListParameters}.
  *   The default value is `AnnotationMode.ENABLE_FORMS`.
  * @property {IPDFXfaLayerFactory} [xfaLayerFactory]
- * @property {Object} [textHighlighterFactory]
  * @property {string} [imageResourcesPath] - Path for image resources, mainly
  *   for annotation icons. Include trailing slash.
  * @property {boolean} [useOnlyCssZoom] - Enables CSS only zooming. The default
@@ -105,6 +105,7 @@ const DEFAULT_LAYER_PROPERTIES = () => {
     downloadManager: null,
     enableScripting: false,
     fieldObjectsPromise: null,
+    findController: null,
     hasJSActionsPromise: null,
     linkService: new SimpleLinkService(),
   };
@@ -157,7 +158,6 @@ class PDFPageView {
     this.renderingQueue = options.renderingQueue;
     this.textLayerFactory = options.textLayerFactory;
     this.xfaLayerFactory = options.xfaLayerFactory;
-    this._textHighlighterFactory = options.textHighlighterFactory;
     if (
       typeof PDFJSDev === "undefined" ||
       PDFJSDev.test("!PRODUCTION || GENERIC")
@@ -260,9 +260,10 @@ class PDFPageView {
     return shadow(
       this,
       "_textHighlighter",
-      this._textHighlighterFactory?.createTextHighlighter({
+      new TextHighlighter({
         pageIndex: this.id - 1,
         eventBus: this.eventBus,
+        findController: this.#layerProperties().findController,
       })
     );
   }

web/pdf_viewer.js

@@ -28,6 +28,8 @@
 /** @typedef {import("./interfaces").IPDFXfaLayerFactory} IPDFXfaLayerFactory */
 // eslint-disable-next-line max-len
 /** @typedef {import("./text_accessibility.js").TextAccessibilityManager} TextAccessibilityManager */
+// eslint-disable-next-line max-len
+/** @typedef {import("./text_highlighter.js").TextHighlighter} TextHighlighter */
 
 import {
   AnnotationEditorType,
@@ -67,7 +69,6 @@ import { NullL10n } from "./l10n_utils.js";
 import { PDFPageView } from "./pdf_page_view.js";
 import { PDFRenderingQueue } from "./pdf_rendering_queue.js";
 import { SimpleLinkService } from "./pdf_link_service.js";
-import { TextHighlighter } from "./text_highlighter.js";
 import { TextLayerBuilder } from "./text_layer_builder.js";
 import { XfaLayerBuilder } from "./xfa_layer_builder.js";
 
@@ -565,6 +566,9 @@ class PDFViewer {
       get fieldObjectsPromise() {
         return self.pdfDocument?.getFieldObjects();
       },
+      get findController() {
+        return self.findController;
+      },
       get hasJSActionsPromise() {
         return self.pdfDocument?.hasJSActions();
       },
@@ -787,7 +791,6 @@ class PDFViewer {
             textLayerMode,
             annotationMode,
             xfaLayerFactory: this,
-            textHighlighterFactory: this,
             imageResourcesPath: this.imageResourcesPath,
             renderer:
               typeof PDFJSDev === "undefined" ||
@@ -1684,24 +1687,6 @@ class PDFViewer {
     });
   }
 
-  /**
-   * @typedef {Object} CreateTextHighlighterParameters
-   * @property {number} pageIndex
-   * @property {EventBus} eventBus
-   */
-
-  /**
-   * @param {CreateTextHighlighterParameters}
-   * @returns {TextHighlighter}
-   */
-  createTextHighlighter({ pageIndex, eventBus }) {
-    return new TextHighlighter({
-      eventBus,
-      pageIndex,
-      findController: this.findController,
-    });
-  }
-
   /**
    * @typedef {Object} CreateXfaLayerBuilderParameters
    * @property {HTMLDivElement} pageDiv