[api-minor] Change {PDFPageView, PDFThumbnailView}.update to take a parameter object

The old `update`-signature started to annoy me back when I added optional content support to the viewer, since we're (often) forced to pass in a bunch of arguments that we don't care about whenever these methods are called.

This is tagged `api-minor` since `PDFPageView` is being used in the `pageviewer` component example, and it's thus possible that these changes could affect some users; the next commit adds fallback handling for the old format.

web/base_viewer.js

@@ -405,9 +405,9 @@ class BaseViewer {
 
     const pageNumber = this._currentPageNumber;
 
-    for (let i = 0, ii = this._pages.length; i < ii; i++) {
-      const pageView = this._pages[i];
-      pageView.update(pageView.scale, rotation);
+    const updateArgs = { rotation };
+    for (const pageView of this._pages) {
+      pageView.update(updateArgs);
     }
     // Prevent errors in case the rotation changes *before* the scale has been
     // set to a non-default value.
@@ -717,8 +717,9 @@ class BaseViewer {
     }
     this._doc.style.setProperty("--zoom-factor", newScale);
 
-    for (let i = 0, ii = this._pages.length; i < ii; i++) {
-      this._pages[i].update(newScale);
+    const updateArgs = { scale: newScale };
+    for (const pageView of this._pages) {
+      pageView.update(updateArgs);
     }
     this._currentScale = newScale;
 
@@ -1435,8 +1436,9 @@ class BaseViewer {
     }
     this._optionalContentConfigPromise = promise;
 
+    const updateArgs = { optionalContentConfigPromise: promise };
     for (const pageView of this._pages) {
-      pageView.update(pageView.scale, pageView.rotation, promise);
+      pageView.update(updateArgs);
     }
     this.update();
 

web/pdf_page_view.js

@@ -297,11 +297,10 @@ class PDFPageView {
     div.appendChild(this.loadingIconDiv);
   }
 
-  update(scale, rotation, optionalContentConfigPromise = null) {
+  update({ scale = 0, rotation = null, optionalContentConfigPromise = null }) {
     this.scale = scale || this.scale;
-    // The rotation may be zero.
-    if (typeof rotation !== "undefined") {
-      this.rotation = rotation;
+    if (typeof rotation === "number") {
+      this.rotation = rotation; // The rotation may be zero.
     }
     if (optionalContentConfigPromise instanceof Promise) {
       this._optionalContentConfigPromise = optionalContentConfigPromise;

web/pdf_thumbnail_view.js

@@ -195,9 +195,9 @@ class PDFThumbnailView {
     }
   }
 
-  update(rotation) {
-    if (typeof rotation !== "undefined") {
-      this.rotation = rotation;
+  update({ rotation = null }) {
+    if (typeof rotation === "number") {
+      this.rotation = rotation; // The rotation may be zero.
     }
     const totalRotation = (this.rotation + this.pdfPageRotate) % 360;
     this.viewport = this.viewport.clone({

web/pdf_thumbnail_viewer.js

@@ -144,8 +144,9 @@ class PDFThumbnailViewer {
     }
     this._pagesRotation = rotation;
 
-    for (let i = 0, ii = this._thumbnails.length; i < ii; i++) {
-      this._thumbnails[i].update(rotation);
+    const updateArgs = { rotation };
+    for (const thumbnail of this._thumbnails) {
+      thumbnail.update(updateArgs);
     }
   }