refactor preview.tsx to make it more manageable

frontend/app/block/block.tsx

@@ -10,7 +10,7 @@ import {
     SubBlockProps,
 } from "@/app/block/blocktypes";
 import { LauncherViewModel } from "@/app/view/launcher/launcher";
-import { PreviewModel } from "@/app/view/preview/preview";
+import { PreviewModel } from "@/app/view/preview/preview-model";
 import { SysinfoViewModel } from "@/app/view/sysinfo/sysinfo";
 import { VDomModel } from "@/app/view/vdom/vdom-model";
 import { ErrorBoundary } from "@/element/errorboundary";

frontend/app/view/preview/directorypreview.tsx → frontend/app/view/preview/preview-directory.tsx

@@ -7,7 +7,6 @@ import { ContextMenuModel } from "@/app/store/contextmenu";
 import { atoms, getApi, globalStore } from "@/app/store/global";
 import { RpcApi } from "@/app/store/wshclientapi";
 import { TabRpcClient } from "@/app/store/wshrpcutil";
-import { type PreviewModel } from "@/app/view/preview/preview";
 import { checkKeyPressed, isCharacterKeyEvent } from "@/util/keyutil";
 import { PLATFORM, PlatformMacOS } from "@/util/platformutil";
 import { addOpenMenuItems } from "@/util/previewutil";
@@ -34,6 +33,7 @@ import { useDrag, useDrop } from "react-dnd";
 import { quote as shellQuote } from "shell-quote";
 import { debounce } from "throttle-debounce";
 import "./directorypreview.scss";
+import { type PreviewModel } from "./preview-model";
 
 const PageJumpSize = 20;
 
@@ -527,20 +527,20 @@ function TableBody({
         if (focusIndex === null || !bodyRef.current || !osRef) {
             return;
         }
-        
+
         const rowElement = bodyRef.current.querySelector(`[data-rowindex="${focusIndex}"]`) as HTMLDivElement;
         if (!rowElement) {
             return;
         }
-        
+
         const viewport = osRef.osInstance().elements().viewport;
         const viewportHeight = viewport.offsetHeight;
         const rowRect = rowElement.getBoundingClientRect();
         const parentRect = viewport.getBoundingClientRect();
         const viewportScrollTop = viewport.scrollTop;
         const rowTopRelativeToViewport = rowRect.top - parentRect.top + viewport.scrollTop;
         const rowBottomRelativeToViewport = rowRect.bottom - parentRect.top + viewport.scrollTop;
-        
+
         if (rowTopRelativeToViewport - 30 < viewportScrollTop) {
             // Row is above the visible area
             let topVal = rowTopRelativeToViewport - 30;
@@ -732,9 +732,12 @@ const TableRow = React.forwardRef(function ({
         [dragItem]
     );
 
-    const dragRef = useCallback((node: HTMLDivElement | null) => {
-        drag(node);
-    }, [drag]);
+    const dragRef = useCallback(
+        (node: HTMLDivElement | null) => {
+            drag(node);
+        },
+        [drag]
+    );
 
     return (
         <div

frontend/app/view/preview/preview-edit.tsx

@@ -0,0 +1,79 @@
+// Copyright 2025, Command Line Inc.
+// SPDX-License-Identifier: Apache-2.0
+
+import { tryReinjectKey } from "@/app/store/keymodel";
+import { CodeEditor } from "@/app/view/codeeditor/codeeditor";
+import { globalStore } from "@/store/global";
+import { adaptFromReactOrNativeKeyEvent, checkKeyPressed } from "@/util/keyutil";
+import { fireAndForget } from "@/util/util";
+import { Monaco } from "@monaco-editor/react";
+import { useAtomValue, useSetAtom } from "jotai";
+import type * as MonacoTypes from "monaco-editor/esm/vs/editor/editor.api";
+import { useEffect } from "react";
+import type { SpecializedViewProps } from "./preview";
+
+function CodeEditPreview({ model }: SpecializedViewProps) {
+    const fileContent = useAtomValue(model.fileContent);
+    const setNewFileContent = useSetAtom(model.newFileContent);
+    const fileInfo = useAtomValue(model.statFile);
+    const fileName = fileInfo?.name;
+    const blockMeta = useAtomValue(model.blockAtom)?.meta;
+
+    function codeEditKeyDownHandler(e: WaveKeyboardEvent): boolean {
+        if (checkKeyPressed(e, "Cmd:e")) {
+            fireAndForget(() => model.setEditMode(false));
+            return true;
+        }
+        if (checkKeyPressed(e, "Cmd:s") || checkKeyPressed(e, "Ctrl:s")) {
+            fireAndForget(model.handleFileSave.bind(model));
+            return true;
+        }
+        if (checkKeyPressed(e, "Cmd:r")) {
+            fireAndForget(model.handleFileRevert.bind(model));
+            return true;
+        }
+        return false;
+    }
+
+    useEffect(() => {
+        model.codeEditKeyDownHandler = codeEditKeyDownHandler;
+        return () => {
+            model.codeEditKeyDownHandler = null;
+            model.monacoRef.current = null;
+        };
+    }, []);
+
+    function onMount(editor: MonacoTypes.editor.IStandaloneCodeEditor, monaco: Monaco): () => void {
+        model.monacoRef.current = editor;
+
+        editor.onKeyDown((e: MonacoTypes.IKeyboardEvent) => {
+            const waveEvent = adaptFromReactOrNativeKeyEvent(e.browserEvent);
+            const handled = tryReinjectKey(waveEvent);
+            if (handled) {
+                e.stopPropagation();
+                e.preventDefault();
+            }
+        });
+
+        const isFocused = globalStore.get(model.nodeModel.isFocused);
+        if (isFocused) {
+            editor.focus();
+        }
+
+        return null;
+    }
+
+    return (
+        <CodeEditor
+            blockId={model.blockId}
+            text={fileContent}
+            filename={fileName}
+            fileinfo={fileInfo}
+            meta={blockMeta}
+            onChange={(text) => setNewFileContent(text)}
+            onMount={onMount}
+        />
+    );
+}
+
+export { CodeEditPreview };

frontend/app/view/preview/preview-markdown.tsx

@@ -0,0 +1,34 @@
+// Copyright 2025, Command Line Inc.
+// SPDX-License-Identifier: Apache-2.0
+
+import { Markdown } from "@/element/markdown";
+import { getOverrideConfigAtom } from "@/store/global";
+import { useAtomValue } from "jotai";
+import { useMemo } from "react";
+import type { SpecializedViewProps } from "./preview";
+
+function MarkdownPreview({ model }: SpecializedViewProps) {
+    const connName = useAtomValue(model.connection);
+    const fileInfo = useAtomValue(model.statFile);
+    const fontSizeOverride = useAtomValue(getOverrideConfigAtom(model.blockId, "markdown:fontsize"));
+    const fixedFontSizeOverride = useAtomValue(getOverrideConfigAtom(model.blockId, "markdown:fixedfontsize"));
+    const resolveOpts: MarkdownResolveOpts = useMemo<MarkdownResolveOpts>(() => {
+        return {
+            connName: connName,
+            baseDir: fileInfo.dir,
+        };
+    }, [connName, fileInfo.dir]);
+    return (
+        <div className="view-preview view-preview-markdown">
+            <Markdown
+                textAtom={model.fileContent}
+                showTocAtom={model.markdownShowToc}
+                resolveOpts={resolveOpts}
+                fontSizeOverride={fontSizeOverride}
+                fixedFontSizeOverride={fixedFontSizeOverride}
+            />
+        </div>
+    );
+}
+
+export { MarkdownPreview };