intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

4 files changed, 151 insertions, 0 deletions

diff --git a/contrib/python/prompt-toolkit/py2/prompt_toolkit/clipboard/__init__.py b/contrib/python/prompt-toolkit/py2/prompt_toolkit/clipboard/__init__.py
new file mode 100644
index 00000000000..56202ddd3bd
--- /dev/null
+++ b/contrib/python/prompt-toolkit/py2/prompt_toolkit/clipboard/__init__.py
@@ -0,0 +1,8 @@
+from .base import Clipboard, ClipboardData
+from .in_memory import InMemoryClipboard
+
+
+# We are not importing `PyperclipClipboard` here, because it would require the
+# `pyperclip` module to be present.
+
+#from .pyperclip import PyperclipClipboard
diff --git a/contrib/python/prompt-toolkit/py2/prompt_toolkit/clipboard/base.py b/contrib/python/prompt-toolkit/py2/prompt_toolkit/clipboard/base.py
new file mode 100644
index 00000000000..803c0b0e7d8
--- /dev/null
+++ b/contrib/python/prompt-toolkit/py2/prompt_toolkit/clipboard/base.py
@@ -0,0 +1,62 @@
+"""
+Clipboard for command line interface.
+"""
+from __future__ import unicode_literals
+from abc import ABCMeta, abstractmethod
+from six import with_metaclass
+import six
+
+from prompt_toolkit.selection import SelectionType
+
+__all__ = (
+    'Clipboard',
+    'ClipboardData',
+)
+
+
+class ClipboardData(object):
+    """
+    Text on the clipboard.
+
+    :param text: string
+    :param type: :class:`~prompt_toolkit.selection.SelectionType`
+    """
+    def __init__(self, text='', type=SelectionType.CHARACTERS):
+        assert isinstance(text, six.string_types)
+        assert type in (SelectionType.CHARACTERS, SelectionType.LINES, SelectionType.BLOCK)
+
+        self.text = text
+        self.type = type
+
+
+class Clipboard(with_metaclass(ABCMeta, object)):
+    """
+    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):
+        """
+        Set data to the clipboard.
+
+        :param data: :class:`~.ClipboardData` instance.
+        """
+
+    def set_text(self, text):  # Not abstract.
+        """
+        Shortcut for setting plain text on clipboard.
+        """
+        assert isinstance(text, six.string_types)
+        self.set_data(ClipboardData(text))
+
+    def rotate(self):
+        """
+        For Emacs mode, rotate the kill ring.
+        """
+
+    @abstractmethod
+    def get_data(self):
+        """
+        Return clipboard data.
+        """
diff --git a/contrib/python/prompt-toolkit/py2/prompt_toolkit/clipboard/in_memory.py b/contrib/python/prompt-toolkit/py2/prompt_toolkit/clipboard/in_memory.py
new file mode 100644
index 00000000000..081666ab808
--- /dev/null
+++ b/contrib/python/prompt-toolkit/py2/prompt_toolkit/clipboard/in_memory.py
@@ -0,0 +1,42 @@
+from .base import Clipboard, ClipboardData
+
+from collections import deque
+
+__all__ = (
+    'InMemoryClipboard',
+)
+
+
+class InMemoryClipboard(Clipboard):
+    """
+    Default clipboard implementation.
+    Just keep the data in memory.
+
+    This implements a kill-ring, for Emacs mode.
+    """
+    def __init__(self, data=None, max_size=60):
+        assert data is None or isinstance(data, ClipboardData)
+        assert max_size >= 1
+
+        self.max_size = max_size
+        self._ring = deque()
+        if data is not None:
+            self.set_data(data)
+
+    def set_data(self, data):
+        assert isinstance(data, ClipboardData)
+        self._ring.appendleft(data)
+
+        while len(self._ring) > self.max_size:
+            self._ring.pop()
+
+    def get_data(self):
+        if self._ring:
+            return self._ring[0]
+        else:
+            return ClipboardData()
+
+    def rotate(self):
+        if self._ring:
+            # Add the very first item at the end.
+            self._ring.append(self._ring.popleft())
diff --git a/contrib/python/prompt-toolkit/py2/prompt_toolkit/clipboard/pyperclip.py b/contrib/python/prompt-toolkit/py2/prompt_toolkit/clipboard/pyperclip.py
new file mode 100644
index 00000000000..61ab3aac0ab
--- /dev/null
+++ b/contrib/python/prompt-toolkit/py2/prompt_toolkit/clipboard/pyperclip.py
@@ -0,0 +1,39 @@
+from __future__ import absolute_import, unicode_literals
+import pyperclip
+
+from prompt_toolkit.selection import SelectionType
+from .base import Clipboard, ClipboardData
+
+__all__ = (
+    'PyperclipClipboard',
+)
+
+
+class PyperclipClipboard(Clipboard):
+    """
+    Clipboard that synchronizes with the Windows/Mac/Linux system clipboard,
+    using the pyperclip module.
+    """
+    def __init__(self):
+        self._data = None
+
+    def set_data(self, data):
+        assert isinstance(data, ClipboardData)
+        self._data = data
+        pyperclip.copy(data.text)
+
+    def get_data(self):
+        text = pyperclip.paste()
+
+        # When the clipboard data is equal to what we copied last time, reuse
+        # the `ClipboardData` instance. That way we're sure to keep the same
+        # `SelectionType`.
+        if self._data and self._data.text == text:
+            return self._data
+
+        # Pyperclip returned something else. Create a new `ClipboardData`
+        # instance.
+        else:
+            return ClipboardData(
+                text=text,
+                type=SelectionType.LINES if '\n' in text else SelectionType.LINES)