fix(tui): support middle-click paste from X11 primary selection

Author: linuxhd0

packages/opencode/src/cli/cmd/tui/component/prompt/index.tsx

@@ -1,4 +1,14 @@
-import { BoxRenderable, TextareaRenderable, MouseEvent, PasteEvent, decodePasteBytes, t, dim, fg } from "@opentui/core"
+import {
+  BoxRenderable,
+  TextareaRenderable,
+  MouseEvent,
+  MouseButton,
+  PasteEvent,
+  decodePasteBytes,
+  t,
+  dim,
+  fg,
+} from "@opentui/core"
 import { createEffect, createMemo, type JSX, onMount, createSignal, onCleanup, on, Show, Switch, Match } from "solid-js"
 import "opentui-spinner/solid"
 import path from "path"
@@ -1005,7 +1015,15 @@ export function Prompt(props: PromptProps) {
                   input.cursorColor = theme.text
                 }, 0)
               }}
-              onMouseDown={(r: MouseEvent) => r.target?.focus()}
+              onMouseDown={async (r: MouseEvent) => {
+                r.target?.focus()
+                if (r.button !== MouseButton.MIDDLE) return
+                if (props.disabled) return
+                r.preventDefault()
+                const text = await Clipboard.readPrimary()
+                if (!text || !input || input.isDestroyed) return
+                input.insertText(text)
+              }}
               focusedBackgroundColor={theme.backgroundElement}
               cursorColor={theme.text}
               syntaxStyle={syntax()}

packages/opencode/src/cli/cmd/tui/util/clipboard.ts

@@ -91,6 +91,24 @@ export namespace Clipboard {
     }
   }
 
+  export async function readPrimary(): Promise<string | undefined> {
+    const os = platform()
+    if (os === "linux") {
+      if (process.env["WAYLAND_DISPLAY"] && Bun.which("wl-paste")) {
+        const text = await $`wl-paste --primary --no-newline`.nothrow().text()
+        if (text) return text
+      }
+      if (Bun.which("xclip")) {
+        const text = await $`xclip -selection primary -o`.nothrow().text()
+        if (text) return text
+      }
+      if (Bun.which("xsel")) {
+        const text = await $`xsel --primary --output`.nothrow().text()
+        if (text) return text
+      }
+    }
+  }
+
   const getCopyMethod = lazy(() => {
     const os = platform()