intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 69 insertions, 0 deletions

diff --git a/contrib/python/ipython/py3/IPython/lib/clipboard.py b/contrib/python/ipython/py3/IPython/lib/clipboard.py
new file mode 100644
index 0000000000..316a8ab1f8
--- /dev/null
+++ b/contrib/python/ipython/py3/IPython/lib/clipboard.py
@@ -0,0 +1,69 @@
+""" Utilities for accessing the platform's clipboard.
+"""
+
+import subprocess
+
+from IPython.core.error import TryNext
+import IPython.utils.py3compat as py3compat
+
+class ClipboardEmpty(ValueError):
+    pass
+
+def win32_clipboard_get():
+    """ Get the current clipboard's text on Windows.
+
+    Requires Mark Hammond's pywin32 extensions.
+    """
+    try:
+        import win32clipboard
+    except ImportError:
+        raise TryNext("Getting text from the clipboard requires the pywin32 "
+                      "extensions: http://sourceforge.net/projects/pywin32/")
+    win32clipboard.OpenClipboard()
+    try:
+        text = win32clipboard.GetClipboardData(win32clipboard.CF_UNICODETEXT)
+    except (TypeError, win32clipboard.error):
+        try:
+            text = win32clipboard.GetClipboardData(win32clipboard.CF_TEXT)
+            text = py3compat.cast_unicode(text, py3compat.DEFAULT_ENCODING)
+        except (TypeError, win32clipboard.error):
+            raise ClipboardEmpty
+    finally:
+        win32clipboard.CloseClipboard()
+    return text
+
+def osx_clipboard_get() -> str:
+    """ Get the clipboard's text on OS X.
+    """
+    p = subprocess.Popen(['pbpaste', '-Prefer', 'ascii'],
+        stdout=subprocess.PIPE)
+    bytes_, stderr = p.communicate()
+    # Text comes in with old Mac \r line endings. Change them to \n.
+    bytes_ = bytes_.replace(b'\r', b'\n')
+    text = py3compat.decode(bytes_)
+    return text
+
+def tkinter_clipboard_get():
+    """ Get the clipboard's text using Tkinter.
+
+    This is the default on systems that are not Windows or OS X. It may
+    interfere with other UI toolkits and should be replaced with an
+    implementation that uses that toolkit.
+    """
+    try:
+        from tkinter import Tk, TclError 
+    except ImportError:
+        raise TryNext("Getting text from the clipboard on this platform requires tkinter.")
+        
+    root = Tk()
+    root.withdraw()
+    try:
+        text = root.clipboard_get()
+    except TclError:
+        raise ClipboardEmpty
+    finally:
+        root.destroy()
+    text = py3compat.cast_unicode(text, py3compat.DEFAULT_ENCODING)
+    return text
+
+