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-rw-r--r--src/prompt_toolkit/clipboard/base.py107
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diff --git a/src/prompt_toolkit/clipboard/base.py b/src/prompt_toolkit/clipboard/base.py
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+"""
+Clipboard for command line interface.
+"""
+from abc import ABCMeta, abstractmethod
+from typing import Callable, Optional
+
+from prompt_toolkit.selection import SelectionType
+
+__all__ = [
+ "Clipboard",
+ "ClipboardData",
+ "DummyClipboard",
+ "DynamicClipboard",
+]
+
+
+class ClipboardData:
+ """
+ Text on the clipboard.
+
+ :param text: string
+ :param type: :class:`~prompt_toolkit.selection.SelectionType`
+ """
+
+ def __init__(
+ self, text: str = "", type: SelectionType = SelectionType.CHARACTERS
+ ) -> None:
+
+ self.text = text
+ self.type = type
+
+
+class Clipboard(metaclass=ABCMeta):
+ """
+ Abstract baseclass for clipboards.
+ (An implementation can be in memory, it can share the X11 or Windows
+ keyboard, or can be persistent.)
+ """
+
+ @abstractmethod
+ def set_data(self, data: ClipboardData) -> None:
+ """
+ Set data to the clipboard.
+
+ :param data: :class:`~.ClipboardData` instance.
+ """
+
+ def set_text(self, text: str) -> None: # Not abstract.
+ """
+ Shortcut for setting plain text on clipboard.
+ """
+ self.set_data(ClipboardData(text))
+
+ def rotate(self) -> None:
+ """
+ For Emacs mode, rotate the kill ring.
+ """
+
+ @abstractmethod
+ def get_data(self) -> ClipboardData:
+ """
+ Return clipboard data.
+ """
+
+
+class DummyClipboard(Clipboard):
+ """
+ Clipboard implementation that doesn't remember anything.
+ """
+
+ def set_data(self, data: ClipboardData) -> None:
+ pass
+
+ def set_text(self, text: str) -> None:
+ pass
+
+ def rotate(self) -> None:
+ pass
+
+ def get_data(self) -> ClipboardData:
+ return ClipboardData()
+
+
+class DynamicClipboard(Clipboard):
+ """
+ Clipboard class that can dynamically returns any Clipboard.
+
+ :param get_clipboard: Callable that returns a :class:`.Clipboard` instance.
+ """
+
+ def __init__(self, get_clipboard: Callable[[], Optional[Clipboard]]) -> None:
+ self.get_clipboard = get_clipboard
+
+ def _clipboard(self) -> Clipboard:
+ return self.get_clipboard() or DummyClipboard()
+
+ def set_data(self, data: ClipboardData) -> None:
+ self._clipboard().set_data(data)
+
+ def set_text(self, text: str) -> None:
+ self._clipboard().set_text(text)
+
+ def rotate(self) -> None:
+ self._clipboard().rotate()
+
+ def get_data(self) -> ClipboardData:
+ return self._clipboard().get_data()