From ea1cd06776e757b7dffce690a32d25edede2bedd Mon Sep 17 00:00:00 2001
From: bd <331677620@qq.com>
Date: Wed, 22 May 2024 17:00:13 +0800
Subject: [PATCH] =?UTF-8?q?fix:=20=E7=BC=A9=E5=B0=8F=E6=97=B6=EF=BC=8C?=
 =?UTF-8?q?=E8=B0=83=E6=95=B4=E9=A1=B5=E7=A0=81=E7=9A=84=E4=BD=8D=E7=BD=AE?=
 =?UTF-8?q?=E4=B8=8D=E5=AF=B9=E7=9A=84=20bug?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .changeset/calm-clocks-rush.md                               | 5 +++++
 packages/pdf-viewer/src/PDFViewer.tsx                        | 4 +++-
 .../src/ZoomAndPageController/ZoomAndPageController.tsx      | 5 +++--
 3 files changed, 11 insertions(+), 3 deletions(-)
 create mode 100644 .changeset/calm-clocks-rush.md

diff --git a/.changeset/calm-clocks-rush.md b/.changeset/calm-clocks-rush.md
new file mode 100644
index 00000000..0bb00303
--- /dev/null
+++ b/.changeset/calm-clocks-rush.md
@@ -0,0 +1,5 @@
+---
+'@orca-fe/pdf-viewer': patch
+---
+
+fix: 缩小时，调整页码的位置不对的 bug
diff --git a/packages/pdf-viewer/src/PDFViewer.tsx b/packages/pdf-viewer/src/PDFViewer.tsx
index b00997c3..eba81545 100644
--- a/packages/pdf-viewer/src/PDFViewer.tsx
+++ b/packages/pdf-viewer/src/PDFViewer.tsx
@@ -283,8 +283,10 @@ const PDFViewer = React.forwardRef<PDFViewerHandle, PDFViewerProps>((props, pRef
     const dom = pageContainerRef.current;
     if (dom) {
       const top = pageTopArr[page];
+      const height = viewports[page]?.height * scale * PixelsPerInch.PDF_TO_CSS_UNITS;
+      const containerHeight = dom.getBoundingClientRect().height;
       dom.scrollTo({
-        top,
+        top: Math.min(top, top + 0.5 * (height - containerHeight)),
         behavior: anim ? 'smooth' : 'auto',
       });
     }
diff --git a/packages/pdf-viewer/src/ZoomAndPageController/ZoomAndPageController.tsx b/packages/pdf-viewer/src/ZoomAndPageController/ZoomAndPageController.tsx
index 0cc9b51c..9b1c5b87 100644
--- a/packages/pdf-viewer/src/ZoomAndPageController/ZoomAndPageController.tsx
+++ b/packages/pdf-viewer/src/ZoomAndPageController/ZoomAndPageController.tsx
@@ -39,8 +39,9 @@ const ZoomAndPageController = (props: ZoomAndPageControllerProps) => {
           }
         }}
         onChange={(value) => {
-          if (!Number.isNaN(Number(value) - 1)) {
-            pdfViewer.changePage(Number(value) - 1);
+          const newPage = Number(value) - 1;
+          if (!Number.isNaN(newPage) && pdfViewer.getCurrentPage() !== newPage) {
+            pdfViewer.changePage(newPage);
           }
         }}
       />