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Convert user-provided internal UFO names to spec-compliant filenames.
This module implements the algorithm for converting between a "user name" -
something that a user can choose arbitrarily inside a font editor - and a file
name suitable for use in a wide range of operating systems and filesystems.
The `UFO 3 specification `_
provides an example of an algorithm for such conversion, which avoids illegal
characters, reserved file names, ambiguity between upper- and lower-case
characters, and clashes with existing files.
This code was originally copied from
`ufoLib `_
by Tal Leming and is copyright (c) 2005-2016, The RoboFab Developers:
- Erik van Blokland
- Tal Leming
- Just van Rossum
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__module__ __qualname__ r7 r7 _/var/www/viveiro_mudafortebrasil/venv/lib/python3.9/site-packages/fontTools/ufoLib/filenames.pyr3 k s r3 r7 )userNamec C s t | tstdt|}t|}|sB| d dkrBd| dd } g }| D ]0}|tv r\d}n|| krp|d7 }|| qJd|} t| | }| d| } g } | dD ]"}
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qd| } || | } | |v rt | |||} | S )a Converts from a user name to a file name.
Takes care to avoid illegal characters, reserved file names, ambiguity between
upper- and lower-case characters, and clashes with existing files.
Args:
userName (str): The input file name.
existing: A case-insensitive list of all existing file names.
prefix: Prefix to be prepended to the file name.
suffix: Suffix to be appended to the file name.
Returns:
A suitable filename.
Raises:
NameTranslationError: If no suitable name could be generated.
Examples::
>>> userNameToFileName("a") == "a"
True
>>> userNameToFileName("A") == "A_"
True
>>> userNameToFileName("AE") == "A_E_"
True
>>> userNameToFileName("Ae") == "A_e"
True
>>> userNameToFileName("ae") == "ae"
True
>>> userNameToFileName("aE") == "aE_"
True
>>> userNameToFileName("a.alt") == "a.alt"
True
>>> userNameToFileName("A.alt") == "A_.alt"
True
>>> userNameToFileName("A.Alt") == "A_.A_lt"
True
>>> userNameToFileName("A.aLt") == "A_.aL_t"
True
>>> userNameToFileName(u"A.alT") == "A_.alT_"
True
>>> userNameToFileName("T_H") == "T__H_"
True
>>> userNameToFileName("T_h") == "T__h"
True
>>> userNameToFileName("t_h") == "t_h"
True
>>> userNameToFileName("F_F_I") == "F__F__I_"
True
>>> userNameToFileName("f_f_i") == "f_f_i"
True
>>> userNameToFileName("Aacute_V.swash") == "A_acute_V_.swash"
True
>>> userNameToFileName(".notdef") == "_notdef"
True
>>> userNameToFileName("con") == "_con"
True
>>> userNameToFileName("CON") == "C_O_N_"
True
>>> userNameToFileName("con.alt") == "_con.alt"
True
>>> userNameToFileName("alt.con") == "alt._con"
True
z(The value for userName must be a string. ._ Nr9 )
isinstancestr
ValueErrorlenillegalCharacterslowerappendjoinmaxFileNameLengthsplitreservedFileNames handleClash1) r: existingprefixsuffix prefixLength suffixLengthZfilteredUserName character sliceLengthpartspartfullNamer7 r7 r8 userNameToFileNameo s4 B
rU c C s t |}t |}|t | | d tkrP|t | | d }t| }| d| } d}d} |du r| t| d }
||
| } | |vr| }qn| d7 } | dkrXqqX|du rt|||}|S )aC A helper function that resolves collisions with existing names when choosing a filename.
This function attempts to append an unused integer counter to the filename.
Args:
userName (str): The input file name.
existing: A case-insensitive list of all existing file names.
prefix: Prefix to be prepended to the file name.
suffix: Suffix to be appended to the file name.
Returns:
A suitable filename.
>>> prefix = ("0" * 5) + "."
>>> suffix = "." + ("0" * 10)
>>> existing = ["a" * 5]
>>> e = list(existing)
>>> handleClash1(userName="A" * 5, existing=e,
... prefix=prefix, suffix=suffix) == (
... '00000.AAAAA000000000000001.0000000000')
True
>>> e = list(existing)
>>> e.append(prefix + "aaaaa" + "1".zfill(15) + suffix)
>>> handleClash1(userName="A" * 5, existing=e,
... prefix=prefix, suffix=suffix) == (
... '00000.AAAAA000000000000002.0000000000')
True
>>> e = list(existing)
>>> e.append(prefix + "AAAAA" + "2".zfill(15) + suffix)
>>> handleClash1(userName="A" * 5, existing=e,
... prefix=prefix, suffix=suffix) == (
... '00000.AAAAA000000000000001.0000000000')
True
Nr> l I5 )rB rG r@ zfillrD handleClash2) r: rK rL rM rN rO lrQ finalNamecounternamerT r7 r7 r8 rJ s( ( rJ c C s| t t| t| }td| }d}d}|du rh|t| | }| | vrT|}qhn|d7 }||kr(qhq(|du rxtd|S )ak A helper function that resolves collisions with existing names when choosing a filename.
This function is a fallback to :func:`handleClash1`. It attempts to append an unused integer counter to the filename.
Args:
userName (str): The input file name.
existing: A case-insensitive list of all existing file names.
prefix: Prefix to be prepended to the file name.
suffix: Suffix to be appended to the file name.
Returns:
A suitable filename.
Raises:
NameTranslationError: If no suitable name could be generated.
Examples::
>>> prefix = ("0" * 5) + "."
>>> suffix = "." + ("0" * 10)
>>> existing = [prefix + str(i) + suffix for i in range(100)]
>>> e = list(existing)
>>> handleClash2(existing=e, prefix=prefix, suffix=suffix) == (
... '00000.100.0000000000')
True
>>> e = list(existing)
>>> e.remove(prefix + "1" + suffix)
>>> handleClash2(existing=e, prefix=prefix, suffix=suffix) == (
... '00000.1.0000000000')
True
>>> e = list(existing)
>>> e.remove(prefix + "2" + suffix)
>>> handleClash2(existing=e, prefix=prefix, suffix=suffix) == (
... '00000.2.0000000000')
True
9Nr> z No unique name could be found.)rG rB intr@ rD r3 )rK rL rM Z maxLengthZmaxValuerZ r[ rT r7 r7 r8 rX s ) rX __main__r; N)r7 r9 r9 )
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