Remove the cffi version of poopt

I originally wrote this one in order to support pypy3, but nobody cares
about maintaining it and cpython users regularly use it instead of the C
extension, not knowing it is much slower on this Python interpreter.

1 files changed, 0 insertions, 185 deletions

diff --git a/poezio/poopt.py b/poezio/poopt.py
deleted file mode 100644
index 7667199a..00000000
--- a/poezio/poopt.py
+++ /dev/null
@@ -1,185 +0,0 @@
-# Copyright 2017 Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
-#
-# This file is part of Poezio.
-#
-# Poezio is free software: you can redistribute it and/or modify
-# it under the terms of the GPL-3.0+ license. See the COPYING file.
-'''This is a template module just for instruction. And poopt.'''
-
-from typing import List, Tuple
-
-# CFFI codepath.
-from cffi import FFI
-
-ffi = FFI()
-ffi.cdef("""
-    typedef long wchar_t;
-    int wcwidth(wchar_t c);
-""")
-libc = ffi.dlopen(None)
-
-# Cython codepath.
-#cdef extern from "wchar.h":
-#    ctypedef Py_UCS4 wchar_t
-#    int wcwidth(wchar_t c)
-
-
-# Just checking if the return value is -1.  In some (all?) implementations,
-# wcwidth("😆") returns -1 while it should return 2.  In these cases, we
-# return 1 instead because this is by far the most probable real value.
-# Since the string is received from python, and the unicode character is
-# extracted with mbrtowc(), and supposing these two compononents are not
-# bugged, and since poezio’s code should never pass '\t', '\n' or their
-# friends, a return value of -1 from wcwidth() is considered to be a bug in
-# wcwidth() (until proven otherwise). xwcwidth() is here to work around
-# this bug.
-def xwcwidth(c: str) -> int:
-    character = ord(c)
-    res = libc.wcwidth(character)
-    if res == -1 and c != '\x19':
-        return 1
-    return res
-
-
-# cut_text: takes a string and returns a tuple of int.
-#
-# Each two int tuple is a line, represented by the ending position it
-# (where it should be cut).  Not that this position is calculed using the
-# position of the python string characters, not just the individual bytes.
-#
-# For example,
-# poopt_cut_text("vivent les réfrigérateurs", 6);
-# will return [(0, 6), (7, 10), (11, 17), (17, 22), (22, 24)], meaning that
-# the lines are
-# "vivent", "les", "réfrig", "érateu" and "rs"
-def cut_text(string: str, width: int) -> List[Tuple[int, int]]:
-    '''cut_text(text, width)
-
-    Return a list of two-tuple, the first int is the starting position of the line and the second is its end.'''
-
-    # The list of tuples that we return
-    retlist = []
-
-    # The start position (in the python-string) of the next line
-    #: unsigned int
-    start_pos = 0
-
-    # The position of the last space seen in the current line. This is used
-    # to cut on spaces instead of cutting inside words, if possible (aka if
-    # there is a space)
-    #: int
-    last_space = -1
-    # The number of columns taken by chars between start_pos and last_space
-    #: size_t
-    cols_until_space = 0
-
-    # Number of columns taken to display the current line so far
-    #: size_t
-    columns = 0
-
-    #: wchar_t
-    #wc = 0
-
-    # The position, considering unicode chars (aka, the position in the
-    # python string). This is used to determine the position in the python
-    # string at which we should cut */
-    #: unsigned int
-    #spos = -1
-
-    in_special_character = False
-    for spos, wc in enumerate(string):
-        # Special case to skip poezio special characters that are contained
-        # in the python string, but should not be counted as chars because
-        # they will not be displayed. Those are the formatting chars (to
-        # insert colors or things like that in the string)
-        if in_special_character:
-            # Skip everything until the end of this format marker, but
-            # without increasing the number of columns of the current
-            # line. Because these chars are not printed.
-            if wc in ('u', 'a', 'i', 'b', 'o', '}'):
-                in_special_character = False
-            continue
-        if wc == '\x19':
-            in_special_character = True
-            continue
-
-        # This is one condition to end the line: an explicit \n is found
-        if wc == '\n':
-            spos += 1
-            retlist.append((start_pos, spos))
-
-            # And then initiate a new line
-            start_pos = spos
-            last_space = -1
-            columns = 0
-            continue
-
-        # Get the number of columns needed to display this character. May be 0, 1 or 2
-        cols = xwcwidth(wc)
-
-        # This is the second condition to end the line: we have consumed
-        # enough columns to fill a whole line
-        if columns + cols > width:
-            # If possible, cut on a space
-            if last_space != -1:
-                retlist.append((start_pos, last_space))
-                start_pos = last_space + 1
-                last_space = -1
-                columns -= (cols_until_space + 1)
-            else:
-                # Otherwise, cut in the middle of a word
-                retlist.append((start_pos, spos))
-                start_pos = spos
-                columns = 0
-        # We save the position of the last space seen in this line, and the
-        # number of columns we have until now. This helps us keep track of
-        # the columns to count when we will use that space as a cutting
-        # point, later
-        if wc == ' ':
-            last_space = spos
-            cols_until_space = columns
-        # We advanced from one char, increment spos by one and add the
-        # char's columns to the line's columns
-        columns += cols
-    # We are at the end of the string, append the last line, not finished
-    retlist.append((start_pos, spos + 1))
-    return retlist
-
-
-# wcswidth: An emulation of the POSIX wcswidth(3) function using xwcwidth.
-def wcswidth(string: str) -> int:
-    '''wcswidth(s)
-
-    The wcswidth() function returns the number of columns needed to represent the wide-character string pointed to by s. Raise UnicodeError if an invalid unicode value is passed'''
-
-    columns = 0
-    for wc in string:
-        columns += xwcwidth(wc)
-    return columns
-
-
-# cut_by_columns: takes a python string and a number of columns, returns a
-# python string truncated to take at most that many columns
-# For example cut_by_columns(n, "エメルカ") will return:
-# - n == 5 -> "エメ" (which takes only 4 columns since we can't cut the
-#   next character in half)
-# - n == 2 -> "エ"
-# - n == 1 -> ""
-# - n == 42 -> "エメルカ"
-# - etc
-def cut_by_columns(string: str, limit: int) -> str:
-    '''cut_by_columns(string, limit)
-
-    returns a string truncated to take at most limit columns'''
-
-    spos = 0
-    columns = 0
-    for wc in string:
-        if columns == limit:
-            break
-        cols = xwcwidth(wc)
-        if columns + cols > limit:
-            break
-        spos += 1
-        columns += cols
-    return string[:spos]