Initial ai typewriter implementation

src/ai_typewriter/clipboard_capture.py

@@ -0,0 +1,29 @@
+from __future__ import annotations
+
+import time
+
+import keyboard
+import pyperclip
+
+
+def capture_selection(copy_wait_seconds: float = 1.0, restore_clipboard: bool = True) -> str:
+    previous = pyperclip.paste()
+    keyboard.send("ctrl+c")
+
+    deadline = time.monotonic() + max(copy_wait_seconds, 0.05)
+    captured = previous
+    while time.monotonic() < deadline:
+        current = pyperclip.paste()
+        if current != previous:
+            captured = current
+            break
+        time.sleep(0.03)
+    else:
+        captured = pyperclip.paste()
+
+    if restore_clipboard:
+        try:
+            pyperclip.copy(previous)
+        except pyperclip.PyperclipException:
+            pass
+    return captured or ""