From ed96379c47e3835f6348715b52c43eb1b09b0b01 Mon Sep 17 00:00:00 2001
From: chanx <1243304602@qq.com>
Date: Fri, 7 Aug 2026 14:23:40 +0800
Subject: [PATCH] fix(markdown): open non-PDF document references in internal
 viewer (#17971)

---
 web/src/components/document-preview/txt-preview.tsx  |  2 +-
 web/src/components/floating-chat-widget-markdown.tsx | 11 ++++++-----
 web/src/components/markdown-content/index.tsx        | 11 ++++++-----
 web/src/components/next-markdown-content/index.tsx   |  9 +++++----
 4 files changed, 18 insertions(+), 15 deletions(-)

diff --git a/web/src/components/document-preview/txt-preview.tsx b/web/src/components/document-preview/txt-preview.tsx
index cf6649e343..b07ad85c2f 100644
--- a/web/src/components/document-preview/txt-preview.tsx
+++ b/web/src/components/document-preview/txt-preview.tsx
@@ -40,7 +40,7 @@ export const TxtPreviewer = ({ className, url }: TxtPreviewerProps) => {
   return (
     <div
       className={classNames(
-        'relative w-full h-full p-4 bg-background-paper border border-border-normal rounded-md',
+        'relative w-full h-dvh p-4 bg-background-paper border border-border-normal rounded-md overflow-auto',
         className,
       )}
     >
diff --git a/web/src/components/floating-chat-widget-markdown.tsx b/web/src/components/floating-chat-widget-markdown.tsx
index df61b30951..cbbb7bdc6a 100644
--- a/web/src/components/floating-chat-widget-markdown.tsx
+++ b/web/src/components/floating-chat-widget-markdown.tsx
@@ -86,13 +86,14 @@ const FloatingChatWidgetMarkdown = ({
     (
       documentId: string,
       chunk: IReferenceChunk,
-      isPdf: boolean,
+      fileExtension: string,
       documentUrl?: string,
     ) =>
       () => {
         if (!documentId) return;
-        if (!isPdf && documentUrl) {
-          window.open(documentUrl, '_blank');
+        if (fileExtension !== 'pdf' && documentUrl) {
+          const nextLink = `/document/${documentId}?ext=${fileExtension}&resource=${'document'}`;
+          window.open(nextLink, '_blank');
         } else if (clickDocumentButton) {
           clickDocumentButton(documentId, chunk);
         }
@@ -215,7 +216,7 @@ const FloatingChatWidgetMarkdown = ({
                       onClick={handleDocumentButtonClick(
                         documentId,
                         chunkItem,
-                        fileExtension === 'pdf',
+                        fileExtension,
                         documentUrl,
                       )}
                       disabled={!documentUrl && fileExtension !== 'pdf'}
@@ -270,7 +271,7 @@ const FloatingChatWidgetMarkdown = ({
               onClick={handleDocumentButtonClick(
                 documentId,
                 chunkItem,
-                fileExtension === 'pdf',
+                fileExtension,
                 documentUrl,
               )}
             />
diff --git a/web/src/components/markdown-content/index.tsx b/web/src/components/markdown-content/index.tsx
index 2f332bc4b5..9789987491 100644
--- a/web/src/components/markdown-content/index.tsx
+++ b/web/src/components/markdown-content/index.tsx
@@ -6,7 +6,7 @@ import { citationMarkerReg } from '@/utils/citation-utils';
 import { getExtension } from '@/utils/document-util';
 import { getDirAttribute } from '@/utils/text-direction';
 import DOMPurify from 'dompurify';
-import { useCallback, useEffect, useMemo } from 'react';
+import { useCallback, useEffect, useMemo, useState } from 'react';
 import Markdown from 'react-markdown';
 import SyntaxHighlighter from 'react-syntax-highlighter';
 import rehypeKatex from 'rehype-katex';
@@ -94,15 +94,16 @@ const MarkdownContent = ({
     (
       documentId: string,
       chunk: IReferenceChunk,
-      isPdf: boolean,
+      fileExtension: string,
       documentUrl?: string,
     ) =>
       () => {
-        if (!isPdf) {
+        if (fileExtension !== 'pdf') {
           if (!documentUrl) {
             return;
           }
-          window.open(documentUrl, '_blank');
+          const nextLink = `/document/${documentId}?ext=${fileExtension}&resource=${'document'}`;
+          window.open(nextLink, '_blank');
         } else {
           clickDocumentButton?.(documentId, chunk);
         }
@@ -226,7 +227,7 @@ const MarkdownContent = ({
                   onClick={handleDocumentButtonClick(
                     documentId,
                     chunkItem,
-                    fileExtension === 'pdf',
+                    fileExtension,
                     documentUrl,
                   )}
                 >
diff --git a/web/src/components/next-markdown-content/index.tsx b/web/src/components/next-markdown-content/index.tsx
index 600c89d6f0..62d3ff80a9 100644
--- a/web/src/components/next-markdown-content/index.tsx
+++ b/web/src/components/next-markdown-content/index.tsx
@@ -200,15 +200,16 @@ function MarkdownContent({
     (
       documentId: string,
       chunk: IReferenceChunk,
-      isPdf: boolean,
+      fileExtension: string,
       documentUrl?: string,
     ) =>
       () => {
-        if (!isPdf) {
+        if (fileExtension !== 'pdf') {
           if (!documentUrl) {
             return;
           }
-          window.open(documentUrl, '_blank');
+          const nextLink = `/document/${documentId}?ext=${fileExtension}&resource=${'document'}`;
+          window.open(nextLink, '_blank');
         } else {
           clickDocumentButton?.(documentId, chunk);
         }
@@ -318,7 +319,7 @@ function MarkdownContent({
                   onClick={handleDocumentButtonClick(
                     documentId,
                     chunkItem,
-                    fileExtension === 'pdf',
+                    fileExtension,
                     documentUrl,
                   )}
                   className="text-ellipsis text-wrap"