Merge pull request #12559 from Snuffleupagus/goToPage-labels

Also update the browser history when the user *manually* change pages using the pageNumber-input (PR 12493 follow-up)

web/app.js

@@ -2537,7 +2537,7 @@ function webViewerPageNumberChanged(evt) {
   // Note that for `<input type="number">` HTML elements, an empty string will
   // be returned for non-number inputs; hence we simply do nothing in that case.
   if (evt.value !== "") {
-    pdfViewer.currentPageLabel = evt.value;
+    PDFViewerApplication.pdfLinkService.goToPage(evt.value);
   }
 
   // Ensure that the page number input displays the correct value, even if the

web/base_viewer.js

@@ -787,6 +787,22 @@ class BaseViewer {
     this._scrollIntoView({ pageDiv: pageView.div });
   }
 
+  /**
+   * @param {string} label - The page label.
+   * @returns {number|null} The page number corresponding to the page label,
+   *   or `null` when no page labels exist and/or the input is invalid.
+   */
+  pageLabelToPageNumber(label) {
+    if (!this._pageLabels) {
+      return null;
+    }
+    const i = this._pageLabels.indexOf(label);
+    if (i < 0) {
+      return null;
+    }
+    return i + 1;
+  }
+
   /**
    * @typedef ScrollPageIntoViewParameters
    * @property {number} pageNumber - The page number.

web/interfaces.js

@@ -59,9 +59,9 @@ class IPDFLinkService {
   async goToDestination(dest) {}
 
   /**
-   * @param {number} pageNumber - The page number.
+   * @param {number|string} val - The page number, or page label.
    */
-  goToPage(pageNumber) {}
+  goToPage(val) {}
 
   /**
    * @param dest - The PDF destination object.

web/pdf_history.js

@@ -290,7 +290,7 @@ class PDFHistory {
       return;
     }
 
-    if (this._destination && this._destination.page === pageNumber) {
+    if (this._destination?.page === pageNumber) {
       // When the new page is identical to the one in `this._destination`, we
       // don't want to add a potential duplicate entry in the browser history.
       return;
@@ -388,16 +388,15 @@ class PDFHistory {
     if (
       typeof PDFJSDev !== "undefined" &&
       PDFJSDev.test("CHROME") &&
-      window.history.state &&
-      window.history.state.chromecomState
+      window.history.state?.chromecomState
     ) {
       // history.state.chromecomState is managed by chromecom.js.
       newState.chromecomState = window.history.state.chromecomState;
     }
     this._updateInternalState(destination, newState.uid);
 
     let newUrl;
-    if (this._updateUrl && destination && destination.hash) {
+    if (this._updateUrl && destination?.hash) {
       const baseUrl = document.location.href.split("#")[0];
       // Prevent errors in Firefox.
       if (!baseUrl.startsWith("file://")) {
@@ -494,7 +493,7 @@ class PDFHistory {
           return false;
         }
         const [perfEntry] = performance.getEntriesByType("navigation");
-        if (!perfEntry || perfEntry.type !== "reload") {
+        if (perfEntry?.type !== "reload") {
           return false;
         }
       } else {
@@ -523,7 +522,7 @@ class PDFHistory {
       clearTimeout(this._updateViewareaTimeout);
       this._updateViewareaTimeout = null;
     }
-    if (removeTemporary && destination && destination.temporary) {
+    if (removeTemporary && destination?.temporary) {
       // When the `destination` comes from the browser history,
       // we no longer treat it as a *temporary* position.
       delete destination.temporary;
@@ -633,8 +632,7 @@ class PDFHistory {
     if (
       (typeof PDFJSDev !== "undefined" &&
         PDFJSDev.test("CHROME") &&
-        state &&
-        state.chromecomState &&
+        state?.chromecomState &&
         !this._isValidState(state)) ||
       !state
     ) {

web/pdf_link_service.js

@@ -182,6 +182,9 @@ class PDFLinkService {
    * @param {string|Array} dest - The named, or explicit, PDF destination.
    */
   async goToDestination(dest) {
+    if (!this.pdfDocument) {
+      return;
+    }
     let namedDest, explicitDest;
     if (typeof dest === "string") {
       namedDest = dest;
@@ -203,19 +206,23 @@ class PDFLinkService {
   /**
    * This method will, when available, also update the browser history.
    *
-   * @param {number} pageNumber - The page number.
+   * @param {number|string} val - The page number, or page label.
    */
-  goToPage(pageNumber) {
+  goToPage(val) {
+    if (!this.pdfDocument) {
+      return;
+    }
+    const pageNumber =
+      (typeof val === "string" && this.pdfViewer.pageLabelToPageNumber(val)) ||
+      val | 0;
     if (
       !(
         Number.isInteger(pageNumber) &&
         pageNumber > 0 &&
         pageNumber <= this.pagesCount
       )
     ) {
-      console.error(
-        `PDFLinkService.goToPage: "${pageNumber}" is not a valid page number.`
-      );
+      console.error(`PDFLinkService.goToPage: "${val}" is not a valid page.`);
       return;
     }
 
@@ -261,6 +268,9 @@ class PDFLinkService {
    * @param {string} hash
    */
   setHash(hash) {
+    if (!this.pdfDocument) {
+      return;
+    }
     let pageNumber, dest;
     if (hash.includes("=")) {
       const params = parseQueryString(hash);
@@ -557,9 +567,9 @@ class SimpleLinkService {
   async goToDestination(dest) {}
 
   /**
-   * @param {number} pageNumber - The page number.
+   * @param {number|string} val - The page number, or page label.
    */
-  goToPage(pageNumber) {}
+  goToPage(val) {}
 
   /**
    * @param dest - The PDF destination object.