Bracketed paste mode support

[exquo]

Description:

When pasting multi-line clipboard contents into urwid, the newline symbols (\n) get reported as enter key presses.

Most terminal emulators now support the bracketed paste mode, which should allow urwid to distinguish between the Enter key presses and newlines in pasted text.

Affected versions

• master branch (4c739b6be21b0c98324e7b7780d8e712f3ad6db3)
• Latest stable version from pypi (2.1.2)

Steps to reproduce

import urwid
def unhandled_input(key):
    txt.set_text(' '.join([txt.text, repr(key)]))
txt = urwid.Text('pressed keys:')
fill = urwid.Filler(txt)
loop = urwid.MainLoop(fill, unhandled_input=unhandled_input)
loop.run()

(same idea: can use the Global Input example in urwid tutorial, or run input_test.py from examples)

Pasting (with e.g. Shift + Insert) into the terminal window where urwid is running a multi-line clipboard contents:

Ab
Cd

The output is

pressed keys: 'A' 'b' 'enter' 'C' 'd' 'enter'

Expected/actual outcome

Expected: pasted newline symbols are interpreted as \n "keys".
Actual: pasted newline symbols are interpreted as enter keys.

Related

Support bracketed paste mode escape sequences #119

[exquo]

An example of the kind of behavior that is expected: pasting the above multi-line contents into bash (with set enable-bracketed-paste on in ~/.inputrc) keeps the newline:

$ Ab
Cd

In sh (dash) the newline gets interpreted as Enter (same as in urwid currently):

$ Ab
Cd
sh: 49: Ab: not found
$ sh: 50: Cd: not found
$