Fix

src/plugins/copyFileContents/index.tsx

@@ -0,0 +1,60 @@
+/*
+ * Vencord, a Discord client mod
+ * Copyright (c) 2024 Vendicated and contributors
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+import "./style.css";
+
+import ErrorBoundary from "@components/ErrorBoundary";
+import { CopyIcon, NoEntrySignIcon } from "@components/Icons";
+import { Devs } from "@utils/constants";
+import { copyWithToast } from "@utils/misc";
+import definePlugin from "@utils/types";
+import { Tooltip, useState } from "@webpack/common";
+
+const CheckMarkIcon = () => {
+    return <svg width="24" height="24" viewBox="0 0 24 24">
+        <path fill="currentColor" d="M21.7 5.3a1 1 0 0 1 0 1.4l-12 12a1 1 0 0 1-1.4 0l-6-6a1 1 0 1 1 1.4-1.4L9 16.58l11.3-11.3a1 1 0 0 1 1.4 0Z"></path>
+    </svg>;
+};
+
+export default definePlugin({
+    name: "CopyFileContents",
+    description: "Adds a button to text file attachments to copy their contents",
+    authors: [Devs.Obsidian, Devs.Nuckyz],
+    patches: [
+        {
+            find: ".Messages.PREVIEW_BYTES_LEFT.format(",
+            replacement: {
+                match: /\.footerGap.+?url:\i,fileName:\i,fileSize:\i}\),(?<=fileContents:(\i),bytesLeft:(\i).+?)/g,
+                replace: "$&$self.addCopyButton({fileContents:$1,bytesLeft:$2}),"
+            }
+        }
+    ],
+
+    addCopyButton: ErrorBoundary.wrap(({ fileContents, bytesLeft }: { fileContents: string, bytesLeft: number; }) => {
+        const [recentlyCopied, setRecentlyCopied] = useState(false);
+
+        return (
+            <Tooltip text={recentlyCopied ? "Copied!" : bytesLeft > 0 ? "File too large to copy" : "Copy File Contents"}>
+                {tooltipProps => (
+                    <div
+                        {...tooltipProps}
+                        className="vc-cfc-button"
+                        role="button"
+                        onClick={() => {
+                            if (!recentlyCopied && bytesLeft <= 0) {
+                                copyWithToast(fileContents);
+                                setRecentlyCopied(true);
+                                setTimeout(() => setRecentlyCopied(false), 2000);
+                            }
+                        }}
+                    >
+                        {recentlyCopied ? <CheckMarkIcon /> : bytesLeft > 0 ? <NoEntrySignIcon color="var(--channel-icon)" /> : <CopyIcon />}
+                    </div>
+                )}
+            </Tooltip>
+        );
+    }, { noop: true }),
+});

src/plugins/copyFileContents/style.css

@@ -0,0 +1,8 @@
+.vc-cfc-button {
+    color: var(--interactive-normal);
+    cursor: pointer;
+}
+
+.vc-cfc-button:hover {
+    color: var(--interactive-hover);
+}