Mercurial > hg
view i18n/polib.py @ 46149:294d5aca4ff5
copies: iterate over children directly (instead of parents)
Before this change we would gather all parent → child edges and iterate on
all parent, gathering copy information for children and aggregating them from
there.
They are not strict requirement for edges to be processed in that specific
order. We could also simply iterate over all "children" revision and aggregate
data from both parents at the same time. This patch does that.
It make various things simpler:
* since both parents are processed at the same time, we no longer need to
cache data for merge (see next changeset for details),
* we no longer need nested loop to process data,
* we no longer need to store partial merge data for a rev from distinct loop
interaction to another when processing merges,
* we no longer need to build a full parent -> children mapping (we only rely on
a simpler "parent -> number of children" map (for memory efficiency),
* the data access pattern is now simpler (from lower revisions to higher
revisions) and entirely predicable. That predictability open the way to
prefetching and parallel processing.
So that new iterations order requires simpler code and open the way to
interesting optimisation.
The effect on performance is quite good. In the worse case, we don't see any
significant negative impact. And in the best case, the reduction of roundtrip
to Python provide us with a significant speed. Some example below:
Repo Case Source-Rev Dest-Rev # of revisions old time new time Difference Factor time per rev
---------------------------------------------------------------------------------------------------------------------------------------------------------------
mozilla-try x00000_revs_x00000_added_0_copies dc8a3ca7010e d16fde900c9c : 34414 revs, 0.962867 s, 0.502584 s, -0.460283 s, × 0.5220, 14 µs/rev
mozilla-try x0000_revs_xx000_added_x_copies 156f6e2674f2 4d0f2c178e66 : 8598 revs, 0.110717 s, 0.076323 s, -0.034394 s, × 0.6894, 8 µs/rev
# full comparison between the previous changeset and this one
Repo Case Source-Rev Dest-Rev # of revisions old time new time Difference Factor time per rev
---------------------------------------------------------------------------------------------------------------------------------------------------------------
mercurial x_revs_x_added_0_copies ad6b123de1c7 39cfcef4f463 : 1 revs, 0.000048 s, 0.000041 s, -0.000007 s, × 0.8542, 41 µs/rev
mercurial x_revs_x_added_x_copies 2b1c78674230 0c1d10351869 : 6 revs, 0.000153 s, 0.000102 s, -0.000051 s, × 0.6667, 17 µs/rev
mercurial x000_revs_x000_added_x_copies 81f8ff2a9bf2 dd3267698d84 : 1032 revs, 0.004209 s, 0.004254 s, +0.000045 s, × 1.0107, 4 µs/rev
pypy x_revs_x_added_0_copies aed021ee8ae8 099ed31b181b : 9 revs, 0.000203 s, 0.000282 s, +0.000079 s, × 1.3892, 31 µs/rev
pypy x_revs_x000_added_0_copies 4aa4e1f8e19a 359343b9ac0e : 1 revs, 0.000059 s, 0.000048 s, -0.000011 s, × 0.8136, 48 µs/rev
pypy x_revs_x_added_x_copies ac52eb7bbbb0 72e022663155 : 7 revs, 0.000194 s, 0.000211 s, +0.000017 s, × 1.0876, 30 µs/rev
pypy x_revs_x00_added_x_copies c3b14617fbd7 ace7255d9a26 : 1 revs, 0.000380 s, 0.000375 s, -0.000005 s, × 0.9868, 375 µs/rev
pypy x_revs_x000_added_x000_copies df6f7a526b60 a83dc6a2d56f : 6 revs, 0.010588 s, 0.010574 s, -0.000014 s, × 0.9987, 1762 µs/rev
pypy x000_revs_xx00_added_0_copies 89a76aede314 2f22446ff07e : 4785 revs, 0.048961 s, 0.049974 s, +0.001013 s, × 1.0207, 10 µs/rev
pypy x000_revs_x000_added_x_copies 8a3b5bfd266e 2c68e87c3efe : 6780 revs, 0.083612 s, 0.084300 s, +0.000688 s, × 1.0082, 12 µs/rev
pypy x000_revs_x000_added_x000_copies 89a76aede314 7b3dda341c84 : 5441 revs, 0.058579 s, 0.060128 s, +0.001549 s, × 1.0264, 11 µs/rev
pypy x0000_revs_x_added_0_copies d1defd0dc478 c9cb1334cc78 : 43645 revs, 0.736783 s, 0.686542 s, -0.050241 s, × 0.9318, 15 µs/rev
pypy x0000_revs_xx000_added_0_copies bf2c629d0071 4ffed77c095c : 2 revs, 0.022050 s, 0.009277 s, -0.012773 s, × 0.4207, 4638 µs/rev
pypy x0000_revs_xx000_added_x000_copies 08ea3258278e d9fa043f30c0 : 11316 revs, 0.120800 s, 0.114733 s, -0.006067 s, × 0.9498, 10 µs/rev
netbeans x_revs_x_added_0_copies fb0955ffcbcd a01e9239f9e7 : 2 revs, 0.000140 s, 0.000081 s, -0.000059 s, × 0.5786, 40 µs/rev
netbeans x_revs_x000_added_0_copies 6f360122949f 20eb231cc7d0 : 2 revs, 0.000114 s, 0.000107 s, -0.000007 s, × 0.9386, 53 µs/rev
netbeans x_revs_x_added_x_copies 1ada3faf6fb6 5a39d12eecf4 : 3 revs, 0.000224 s, 0.000173 s, -0.000051 s, × 0.7723, 57 µs/rev
netbeans x_revs_x00_added_x_copies 35be93ba1e2c 9eec5e90c05f : 9 revs, 0.000723 s, 0.000698 s, -0.000025 s, × 0.9654, 77 µs/rev
netbeans x000_revs_xx00_added_0_copies eac3045b4fdd 51d4ae7f1290 : 1421 revs, 0.009665 s, 0.009248 s, -0.000417 s, × 0.9569, 6 µs/rev
netbeans x000_revs_x000_added_x_copies e2063d266acd 6081d72689dc : 1533 revs, 0.014820 s, 0.015446 s, +0.000626 s, × 1.0422, 10 µs/rev
netbeans x000_revs_x000_added_x000_copies ff453e9fee32 411350406ec2 : 5750 revs, 0.076049 s, 0.074373 s, -0.001676 s, × 0.9780, 12 µs/rev
netbeans x0000_revs_xx000_added_x000_copies 588c2d1ced70 1aad62e59ddd : 66949 revs, 0.683603 s, 0.639870 s, -0.043733 s, × 0.9360, 9 µs/rev
mozilla-central x_revs_x_added_0_copies 3697f962bb7b 7015fcdd43a2 : 2 revs, 0.000161 s, 0.000088 s, -0.000073 s, × 0.5466, 44 µs/rev
mozilla-central x_revs_x000_added_0_copies dd390860c6c9 40d0c5bed75d : 8 revs, 0.000234 s, 0.000199 s, -0.000035 s, × 0.8504, 24 µs/rev
mozilla-central x_revs_x_added_x_copies 8d198483ae3b 14207ffc2b2f : 9 revs, 0.000247 s, 0.000171 s, -0.000076 s, × 0.6923, 19 µs/rev
mozilla-central x_revs_x00_added_x_copies 98cbc58cc6bc 446a150332c3 : 7 revs, 0.000630 s, 0.000592 s, -0.000038 s, × 0.9397, 84 µs/rev
mozilla-central x_revs_x000_added_x000_copies 3c684b4b8f68 0a5e72d1b479 : 3 revs, 0.003286 s, 0.003151 s, -0.000135 s, × 0.9589, 1050 µs/rev
mozilla-central x_revs_x0000_added_x0000_copies effb563bb7e5 c07a39dc4e80 : 6 revs, 0.062441 s, 0.061612 s, -0.000829 s, × 0.9867, 10268 µs/rev
mozilla-central x000_revs_xx00_added_0_copies 6100d773079a 04a55431795e : 1593 revs, 0.005423 s, 0.005381 s, -0.000042 s, × 0.9923, 3 µs/rev
mozilla-central x000_revs_x000_added_x_copies 9f17a6fc04f9 2d37b966abed : 41 revs, 0.005919 s, 0.003742 s, -0.002177 s, × 0.6322, 91 µs/rev
mozilla-central x000_revs_x000_added_x000_copies 7c97034feb78 4407bd0c6330 : 7839 revs, 0.062597 s, 0.061983 s, -0.000614 s, × 0.9902, 7 µs/rev
mozilla-central x0000_revs_xx000_added_0_copies 9eec5917337d 67118cc6dcad : 615 revs, 0.043551 s, 0.019861 s, -0.023690 s, × 0.4560, 32 µs/rev
mozilla-central x0000_revs_xx000_added_x000_copies f78c615a656c 96a38b690156 : 30263 revs, 0.192475 s, 0.188101 s, -0.004374 s, × 0.9773, 6 µs/rev
mozilla-central x00000_revs_x0000_added_x0000_copies 6832ae71433c 4c222a1d9a00 : 153721 revs, 1.955575 s, 1.806696 s, -0.148879 s, × 0.9239, 11 µs/rev
mozilla-central x00000_revs_x00000_added_x000_copies 76caed42cf7c 1daa622bbe42 : 204976 revs, 2.886501 s, 2.682987 s, -0.203514 s, × 0.9295, 13 µs/rev
mozilla-try x_revs_x_added_0_copies aaf6dde0deb8 9790f499805a : 2 revs, 0.001181 s, 0.000852 s, -0.000329 s, × 0.7214, 426 µs/rev
mozilla-try x_revs_x000_added_0_copies d8d0222927b4 5bb8ce8c7450 : 2 revs, 0.001189 s, 0.000859 s, -0.000330 s, × 0.7225, 429 µs/rev
mozilla-try x_revs_x_added_x_copies 092fcca11bdb 936255a0384a : 4 revs, 0.000563 s, 0.000150 s, -0.000413 s, × 0.2664, 37 µs/rev
mozilla-try x_revs_x00_added_x_copies b53d2fadbdb5 017afae788ec : 2 revs, 0.001548 s, 0.001158 s, -0.000390 s, × 0.7481, 579 µs/rev
mozilla-try x_revs_x000_added_x000_copies 20408ad61ce5 6f0ee96e21ad : 1 revs, 0.027782 s, 0.027240 s, -0.000542 s, × 0.9805, 27240 µs/rev
mozilla-try x_revs_x0000_added_x0000_copies effb563bb7e5 c07a39dc4e80 : 6 revs, 0.062781 s, 0.062824 s, +0.000043 s, × 1.0007, 10470 µs/rev
mozilla-try x000_revs_xx00_added_0_copies 6100d773079a 04a55431795e : 1593 revs, 0.005778 s, 0.005463 s, -0.000315 s, × 0.9455, 3 µs/rev
mozilla-try x000_revs_x000_added_x_copies 9f17a6fc04f9 2d37b966abed : 41 revs, 0.006192 s, 0.004238 s, -0.001954 s, × 0.6844, 103 µs/rev
mozilla-try x000_revs_x000_added_x000_copies 1346fd0130e4 4c65cbdabc1f : 6657 revs, 0.065391 s, 0.064113 s, -0.001278 s, × 0.9805, 9 µs/rev
mozilla-try x0000_revs_x_added_0_copies 63519bfd42ee a36a2a865d92 : 40314 revs, 0.317216 s, 0.294063 s, -0.023153 s, × 0.9270, 7 µs/rev
mozilla-try x0000_revs_x_added_x_copies 9fe69ff0762d bcabf2a78927 : 38690 revs, 0.303119 s, 0.281493 s, -0.021626 s, × 0.9287, 7 µs/rev
mozilla-try x0000_revs_xx000_added_x_copies 156f6e2674f2 4d0f2c178e66 : 8598 revs, 0.110717 s, 0.076323 s, -0.034394 s, × 0.6894, 8 µs/rev
mozilla-try x0000_revs_xx000_added_0_copies 9eec5917337d 67118cc6dcad : 615 revs, 0.045739 s, 0.020390 s, -0.025349 s, × 0.4458, 33 µs/rev
mozilla-try x0000_revs_xx000_added_x000_copies 89294cd501d9 7ccb2fc7ccb5 : 97052 revs, 3.098021 s, 3.023879 s, -0.074142 s, × 0.9761, 31 µs/rev
mozilla-try x0000_revs_x0000_added_x0000_copies e928c65095ed e951f4ad123a : 52031 revs, 0.771480 s, 0.735549 s, -0.035931 s, × 0.9534, 14 µs/rev
mozilla-try x00000_revs_x_added_0_copies 6a320851d377 1ebb79acd503 : 363753 revs, 18.813422 s, 18.568900 s, -0.244522 s, × 0.9870, 51 µs/rev
mozilla-try x00000_revs_x00000_added_0_copies dc8a3ca7010e d16fde900c9c : 34414 revs, 0.962867 s, 0.502584 s, -0.460283 s, × 0.5220, 14 µs/rev
mozilla-try x00000_revs_x_added_x_copies 5173c4b6f97c 95d83ee7242d : 362229 revs, 18.684923 s, 18.356645 s, -0.328278 s, × 0.9824, 50 µs/rev
mozilla-try x00000_revs_x000_added_x_copies 9126823d0e9c ca82787bb23c : 359344 revs, 18.296305 s, 18.250393 s, -0.045912 s, × 0.9975, 50 µs/rev
mozilla-try x00000_revs_x0000_added_x0000_copies 8d3fafa80d4b eb884023b810 : 192665 revs, 3.061887 s, 2.792459 s, -0.269428 s, × 0.9120, 14 µs/rev
mozilla-try x00000_revs_x00000_added_x0000_copies 1b661134e2ca 1ae03d022d6d : 228985 revs, 103.869641 s, 107.697264 s, +3.827623 s, × 1.0369, 470 µs/rev
mozilla-try x00000_revs_x00000_added_x000_copies 9b2a99adc05e 8e29777b48e6 : 382065 revs, 64.262957 s, 63.961040 s, -0.301917 s, × 0.9953, 167 µs/rev
Differential Revision: https://phab.mercurial-scm.org/D9422
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
---|---|
date | Mon, 14 Dec 2020 11:32:24 +0100 |
parents | 9d2b2df2c2ba |
children | 6000f5b25c9b |
line wrap: on
line source
# no-check-code # -* coding: utf-8 -*- # # License: MIT (see LICENSE file provided) # vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: """ **polib** allows you to manipulate, create, modify gettext files (pot, po and mo files). You can load existing files, iterate through it's entries, add, modify entries, comments or metadata, etc. or create new po files from scratch. **polib** provides a simple and pythonic API via the :func:`~polib.pofile` and :func:`~polib.mofile` convenience functions. """ from __future__ import absolute_import __author__ = 'David Jean Louis <izimobil@gmail.com>' __version__ = '1.0.7' __all__ = [ 'pofile', 'POFile', 'POEntry', 'mofile', 'MOFile', 'MOEntry', 'default_encoding', 'escape', 'unescape', 'detect_encoding', ] import array import codecs import os import re import struct import sys import textwrap try: import io except ImportError: # replacement of io.open() for python < 2.6 # we use codecs instead class io(object): @staticmethod def open(fpath, mode='r', encoding=None): return codecs.open(fpath, mode, encoding) # the default encoding to use when encoding cannot be detected default_encoding = 'utf-8' # python 2/3 compatibility helpers {{{ if sys.version_info[:2] < (3, 0): PY3 = False text_type = unicode def b(s): return s def u(s): return unicode(s, "unicode_escape") else: PY3 = True text_type = str def b(s): return s.encode("latin-1") def u(s): return s # }}} # _pofile_or_mofile {{{ def _pofile_or_mofile(f, type, **kwargs): """ Internal function used by :func:`polib.pofile` and :func:`polib.mofile` to honor the DRY concept. """ # get the file encoding enc = kwargs.get('encoding') if enc is None: enc = detect_encoding(f, type == 'mofile') # parse the file kls = type == 'pofile' and _POFileParser or _MOFileParser parser = kls( f, encoding=enc, check_for_duplicates=kwargs.get('check_for_duplicates', False), klass=kwargs.get('klass'), ) instance = parser.parse() instance.wrapwidth = kwargs.get('wrapwidth', 78) return instance # }}} # _is_file {{{ def _is_file(filename_or_contents): """ Safely returns the value of os.path.exists(filename_or_contents). Arguments: ``filename_or_contents`` either a filename, or a string holding the contents of some file. In the latter case, this function will always return False. """ try: return os.path.exists(filename_or_contents) except (ValueError, UnicodeEncodeError): return False # }}} # function pofile() {{{ def pofile(pofile, **kwargs): """ Convenience function that parses the po or pot file ``pofile`` and returns a :class:`~polib.POFile` instance. Arguments: ``pofile`` string, full or relative path to the po/pot file or its content (data). ``wrapwidth`` integer, the wrap width, only useful when the ``-w`` option was passed to xgettext (optional, default: ``78``). ``encoding`` string, the encoding to use (e.g. "utf-8") (default: ``None``, the encoding will be auto-detected). ``check_for_duplicates`` whether to check for duplicate entries when adding entries to the file (optional, default: ``False``). ``klass`` class which is used to instantiate the return value (optional, default: ``None``, the return value with be a :class:`~polib.POFile` instance). """ return _pofile_or_mofile(pofile, 'pofile', **kwargs) # }}} # function mofile() {{{ def mofile(mofile, **kwargs): """ Convenience function that parses the mo file ``mofile`` and returns a :class:`~polib.MOFile` instance. Arguments: ``mofile`` string, full or relative path to the mo file or its content (data). ``wrapwidth`` integer, the wrap width, only useful when the ``-w`` option was passed to xgettext to generate the po file that was used to format the mo file (optional, default: ``78``). ``encoding`` string, the encoding to use (e.g. "utf-8") (default: ``None``, the encoding will be auto-detected). ``check_for_duplicates`` whether to check for duplicate entries when adding entries to the file (optional, default: ``False``). ``klass`` class which is used to instantiate the return value (optional, default: ``None``, the return value with be a :class:`~polib.POFile` instance). """ return _pofile_or_mofile(mofile, 'mofile', **kwargs) # }}} # function detect_encoding() {{{ def detect_encoding(file, binary_mode=False): """ Try to detect the encoding used by the ``file``. The ``file`` argument can be a PO or MO file path or a string containing the contents of the file. If the encoding cannot be detected, the function will return the value of ``default_encoding``. Arguments: ``file`` string, full or relative path to the po/mo file or its content. ``binary_mode`` boolean, set this to True if ``file`` is a mo file. """ PATTERN = r'"?Content-Type:.+? charset=([\w_\-:\.]+)' rxt = re.compile(u(PATTERN)) rxb = re.compile(b(PATTERN)) def charset_exists(charset): """Check whether ``charset`` is valid or not.""" try: codecs.lookup(charset) except LookupError: return False return True if not _is_file(file): match = rxt.search(file) if match: enc = match.group(1).strip() if charset_exists(enc): return enc else: # For PY3, always treat as binary if binary_mode or PY3: mode = 'rb' rx = rxb else: mode = 'r' rx = rxt f = open(file, mode) for l in f.readlines(): match = rx.search(l) if match: f.close() enc = match.group(1).strip() if not isinstance(enc, text_type): enc = enc.decode('utf-8') if charset_exists(enc): return enc f.close() return default_encoding # }}} # function escape() {{{ def escape(st): """ Escapes the characters ``\\\\``, ``\\t``, ``\\n``, ``\\r`` and ``"`` in the given string ``st`` and returns it. """ return ( st.replace('\\', r'\\') .replace('\t', r'\t') .replace('\r', r'\r') .replace('\n', r'\n') .replace('\"', r'\"') ) # }}} # function unescape() {{{ def unescape(st): """ Unescapes the characters ``\\\\``, ``\\t``, ``\\n``, ``\\r`` and ``"`` in the given string ``st`` and returns it. """ def unescape_repl(m): m = m.group(1) if m == 'n': return '\n' if m == 't': return '\t' if m == 'r': return '\r' if m == '\\': return '\\' return m # handles escaped double quote return re.sub(r'\\(\\|n|t|r|")', unescape_repl, st) # }}} # class _BaseFile {{{ class _BaseFile(list): """ Common base class for the :class:`~polib.POFile` and :class:`~polib.MOFile` classes. This class should **not** be instanciated directly. """ def __init__(self, *args, **kwargs): """ Constructor, accepts the following keyword arguments: ``pofile`` string, the path to the po or mo file, or its content as a string. ``wrapwidth`` integer, the wrap width, only useful when the ``-w`` option was passed to xgettext (optional, default: ``78``). ``encoding`` string, the encoding to use, defaults to ``default_encoding`` global variable (optional). ``check_for_duplicates`` whether to check for duplicate entries when adding entries to the file, (optional, default: ``False``). """ list.__init__(self) # the opened file handle pofile = kwargs.get('pofile', None) if pofile and _is_file(pofile): self.fpath = pofile else: self.fpath = kwargs.get('fpath') # the width at which lines should be wrapped self.wrapwidth = kwargs.get('wrapwidth', 78) # the file encoding self.encoding = kwargs.get('encoding', default_encoding) # whether to check for duplicate entries or not self.check_for_duplicates = kwargs.get('check_for_duplicates', False) # header self.header = '' # both po and mo files have metadata self.metadata = {} self.metadata_is_fuzzy = 0 def __unicode__(self): """ Returns the unicode representation of the file. """ ret = [] entries = [self.metadata_as_entry()] + [ e for e in self if not e.obsolete ] for entry in entries: ret.append(entry.__unicode__(self.wrapwidth)) for entry in self.obsolete_entries(): ret.append(entry.__unicode__(self.wrapwidth)) ret = u('\n').join(ret) assert isinstance(ret, text_type) # if type(ret) != text_type: # return unicode(ret, self.encoding) return ret if PY3: def __str__(self): return self.__unicode__() else: def __str__(self): """ Returns the string representation of the file. """ return unicode(self).encode(self.encoding) def __contains__(self, entry): """ Overridden ``list`` method to implement the membership test (in and not in). The method considers that an entry is in the file if it finds an entry that has the same msgid (the test is **case sensitive**) and the same msgctxt (or none for both entries). Argument: ``entry`` an instance of :class:`~polib._BaseEntry`. """ return ( self.find(entry.msgid, by='msgid', msgctxt=entry.msgctxt) is not None ) def __eq__(self, other): return str(self) == str(other) def append(self, entry): """ Overridden method to check for duplicates entries, if a user tries to add an entry that is already in the file, the method will raise a ``ValueError`` exception. Argument: ``entry`` an instance of :class:`~polib._BaseEntry`. """ if self.check_for_duplicates and entry in self: raise ValueError('Entry "%s" already exists' % entry.msgid) super(_BaseFile, self).append(entry) def insert(self, index, entry): """ Overridden method to check for duplicates entries, if a user tries to add an entry that is already in the file, the method will raise a ``ValueError`` exception. Arguments: ``index`` index at which the entry should be inserted. ``entry`` an instance of :class:`~polib._BaseEntry`. """ if self.check_for_duplicates and entry in self: raise ValueError('Entry "%s" already exists' % entry.msgid) super(_BaseFile, self).insert(index, entry) def metadata_as_entry(self): """ Returns the file metadata as a :class:`~polib.POFile` instance. """ e = POEntry(msgid='') mdata = self.ordered_metadata() if mdata: strs = [] for name, value in mdata: # Strip whitespace off each line in a multi-line entry strs.append('%s: %s' % (name, value)) e.msgstr = '\n'.join(strs) + '\n' if self.metadata_is_fuzzy: e.flags.append('fuzzy') return e def save(self, fpath=None, repr_method='__unicode__'): """ Saves the po file to ``fpath``. If it is an existing file and no ``fpath`` is provided, then the existing file is rewritten with the modified data. Keyword arguments: ``fpath`` string, full or relative path to the file. ``repr_method`` string, the method to use for output. """ if self.fpath is None and fpath is None: raise IOError('You must provide a file path to save() method') contents = getattr(self, repr_method)() if fpath is None: fpath = self.fpath if repr_method == 'to_binary': fhandle = open(fpath, 'wb') else: fhandle = io.open(fpath, 'w', encoding=self.encoding) if not isinstance(contents, text_type): contents = contents.decode(self.encoding) fhandle.write(contents) fhandle.close() # set the file path if not set if self.fpath is None and fpath: self.fpath = fpath def find( self, st, by='msgid', include_obsolete_entries=False, msgctxt=False ): """ Find the entry which msgid (or property identified by the ``by`` argument) matches the string ``st``. Keyword arguments: ``st`` string, the string to search for. ``by`` string, the property to use for comparison (default: ``msgid``). ``include_obsolete_entries`` boolean, whether to also search in entries that are obsolete. ``msgctxt`` string, allows specifying a specific message context for the search. """ if include_obsolete_entries: entries = self[:] else: entries = [e for e in self if not e.obsolete] for e in entries: if getattr(e, by) == st: if msgctxt is not False and e.msgctxt != msgctxt: continue return e return None def ordered_metadata(self): """ Convenience method that returns an ordered version of the metadata dictionary. The return value is list of tuples (metadata name, metadata_value). """ # copy the dict first metadata = self.metadata.copy() data_order = [ 'Project-Id-Version', 'Report-Msgid-Bugs-To', 'POT-Creation-Date', 'PO-Revision-Date', 'Last-Translator', 'Language-Team', 'MIME-Version', 'Content-Type', 'Content-Transfer-Encoding', 'Language', 'Plural-Forms', ] ordered_data = [] for data in data_order: try: value = metadata.pop(data) ordered_data.append((data, value)) except KeyError: pass # the rest of the metadata will be alphabetically ordered since there # are no specs for this AFAIK for data in sorted(metadata.keys()): value = metadata[data] ordered_data.append((data, value)) return ordered_data def to_binary(self): """ Return the binary representation of the file. """ offsets = [] entries = self.translated_entries() # add metadata entry entries.sort(key=lambda o: o.msgctxt or o.msgid) mentry = self.metadata_as_entry() # mentry.msgstr = mentry.msgstr.replace('\\n', '').lstrip() entries = [mentry] + entries entries_len = len(entries) ids, strs = b(''), b('') for e in entries: # For each string, we need size and file offset. Each string is # NUL terminated; the NUL does not count into the size. msgid = b('') if e.msgctxt: # Contexts are stored by storing the concatenation of the # context, a <EOT> byte, and the original string msgid = self._encode(e.msgctxt + '\4') if e.msgid_plural: msgstr = [] for index in sorted(e.msgstr_plural.keys()): msgstr.append(e.msgstr_plural[index]) msgid += self._encode(e.msgid + '\0' + e.msgid_plural) msgstr = self._encode('\0'.join(msgstr)) else: msgid += self._encode(e.msgid) msgstr = self._encode(e.msgstr) offsets.append((len(ids), len(msgid), len(strs), len(msgstr))) ids += msgid + b('\0') strs += msgstr + b('\0') # The header is 7 32-bit unsigned integers. keystart = 7 * 4 + 16 * entries_len # and the values start after the keys valuestart = keystart + len(ids) koffsets = [] voffsets = [] # The string table first has the list of keys, then the list of values. # Each entry has first the size of the string, then the file offset. for o1, l1, o2, l2 in offsets: koffsets += [l1, o1 + keystart] voffsets += [l2, o2 + valuestart] offsets = koffsets + voffsets output = struct.pack( "Iiiiiii", # Magic number MOFile.MAGIC, # Version 0, # number of entries entries_len, # start of key index 7 * 4, # start of value index 7 * 4 + entries_len * 8, # size and offset of hash table, we don't use hash tables 0, keystart, ) if PY3 and sys.version_info.minor > 1: # python 3.2 or superior output += array.array("i", offsets).tobytes() else: output += array.array("i", offsets).tostring() output += ids output += strs return output def _encode(self, mixed): """ Encodes the given ``mixed`` argument with the file encoding if and only if it's an unicode string and returns the encoded string. """ if isinstance(mixed, text_type): mixed = mixed.encode(self.encoding) return mixed # }}} # class POFile {{{ class POFile(_BaseFile): """ Po (or Pot) file reader/writer. This class inherits the :class:`~polib._BaseFile` class and, by extension, the python ``list`` type. """ def __unicode__(self): """ Returns the unicode representation of the po file. """ ret, headers = '', self.header.split('\n') for header in headers: if not len(header): ret += "#\n" elif header[:1] in [',', ':']: ret += '#%s\n' % header else: ret += '# %s\n' % header if not isinstance(ret, text_type): ret = ret.decode(self.encoding) return ret + _BaseFile.__unicode__(self) def save_as_mofile(self, fpath): """ Saves the binary representation of the file to given ``fpath``. Keyword argument: ``fpath`` string, full or relative path to the mo file. """ _BaseFile.save(self, fpath, 'to_binary') def percent_translated(self): """ Convenience method that returns the percentage of translated messages. """ total = len([e for e in self if not e.obsolete]) if total == 0: return 100 translated = len(self.translated_entries()) return int(translated * 100 / float(total)) def translated_entries(self): """ Convenience method that returns the list of translated entries. """ return [e for e in self if e.translated()] def untranslated_entries(self): """ Convenience method that returns the list of untranslated entries. """ return [ e for e in self if not e.translated() and not e.obsolete and not 'fuzzy' in e.flags ] def fuzzy_entries(self): """ Convenience method that returns the list of fuzzy entries. """ return [e for e in self if 'fuzzy' in e.flags] def obsolete_entries(self): """ Convenience method that returns the list of obsolete entries. """ return [e for e in self if e.obsolete] def merge(self, refpot): """ Convenience method that merges the current pofile with the pot file provided. It behaves exactly as the gettext msgmerge utility: * comments of this file will be preserved, but extracted comments and occurrences will be discarded; * any translations or comments in the file will be discarded, however, dot comments and file positions will be preserved; * the fuzzy flags are preserved. Keyword argument: ``refpot`` object POFile, the reference catalog. """ # Store entries in dict/set for faster access self_entries = {entry.msgid: entry for entry in self} refpot_msgids = {entry.msgid for entry in refpot} # Merge entries that are in the refpot for entry in refpot: e = self_entries.get(entry.msgid) if e is None: e = POEntry() self.append(e) e.merge(entry) # ok, now we must "obsolete" entries that are not in the refpot anymore for entry in self: if entry.msgid not in refpot_msgids: entry.obsolete = True # }}} # class MOFile {{{ class MOFile(_BaseFile): """ Mo file reader/writer. This class inherits the :class:`~polib._BaseFile` class and, by extension, the python ``list`` type. """ MAGIC = 0x950412DE MAGIC_SWAPPED = 0xDE120495 def __init__(self, *args, **kwargs): """ Constructor, accepts all keywords arguments accepted by :class:`~polib._BaseFile` class. """ _BaseFile.__init__(self, *args, **kwargs) self.magic_number = None self.version = 0 def save_as_pofile(self, fpath): """ Saves the mofile as a pofile to ``fpath``. Keyword argument: ``fpath`` string, full or relative path to the file. """ _BaseFile.save(self, fpath) def save(self, fpath=None): """ Saves the mofile to ``fpath``. Keyword argument: ``fpath`` string, full or relative path to the file. """ _BaseFile.save(self, fpath, 'to_binary') def percent_translated(self): """ Convenience method to keep the same interface with POFile instances. """ return 100 def translated_entries(self): """ Convenience method to keep the same interface with POFile instances. """ return self def untranslated_entries(self): """ Convenience method to keep the same interface with POFile instances. """ return [] def fuzzy_entries(self): """ Convenience method to keep the same interface with POFile instances. """ return [] def obsolete_entries(self): """ Convenience method to keep the same interface with POFile instances. """ return [] # }}} # class _BaseEntry {{{ class _BaseEntry(object): """ Base class for :class:`~polib.POEntry` and :class:`~polib.MOEntry` classes. This class should **not** be instanciated directly. """ def __init__(self, *args, **kwargs): """ Constructor, accepts the following keyword arguments: ``msgid`` string, the entry msgid. ``msgstr`` string, the entry msgstr. ``msgid_plural`` string, the entry msgid_plural. ``msgstr_plural`` list, the entry msgstr_plural lines. ``msgctxt`` string, the entry context (msgctxt). ``obsolete`` bool, whether the entry is "obsolete" or not. ``encoding`` string, the encoding to use, defaults to ``default_encoding`` global variable (optional). """ self.msgid = kwargs.get('msgid', '') self.msgstr = kwargs.get('msgstr', '') self.msgid_plural = kwargs.get('msgid_plural', '') self.msgstr_plural = kwargs.get('msgstr_plural', {}) self.msgctxt = kwargs.get('msgctxt', None) self.obsolete = kwargs.get('obsolete', False) self.encoding = kwargs.get('encoding', default_encoding) def __unicode__(self, wrapwidth=78): """ Returns the unicode representation of the entry. """ if self.obsolete: delflag = '#~ ' else: delflag = '' ret = [] # write the msgctxt if any if self.msgctxt is not None: ret += self._str_field( "msgctxt", delflag, "", self.msgctxt, wrapwidth ) # write the msgid ret += self._str_field("msgid", delflag, "", self.msgid, wrapwidth) # write the msgid_plural if any if self.msgid_plural: ret += self._str_field( "msgid_plural", delflag, "", self.msgid_plural, wrapwidth ) if self.msgstr_plural: # write the msgstr_plural if any msgstrs = self.msgstr_plural keys = list(msgstrs) keys.sort() for index in keys: msgstr = msgstrs[index] plural_index = '[%s]' % index ret += self._str_field( "msgstr", delflag, plural_index, msgstr, wrapwidth ) else: # otherwise write the msgstr ret += self._str_field( "msgstr", delflag, "", self.msgstr, wrapwidth ) ret.append('') ret = u('\n').join(ret) return ret if PY3: def __str__(self): return self.__unicode__() else: def __str__(self): """ Returns the string representation of the entry. """ return unicode(self).encode(self.encoding) def __eq__(self, other): return str(self) == str(other) def _str_field(self, fieldname, delflag, plural_index, field, wrapwidth=78): lines = field.splitlines(True) if len(lines) > 1: lines = [''] + lines # start with initial empty line else: escaped_field = escape(field) specialchars_count = 0 for c in ['\\', '\n', '\r', '\t', '"']: specialchars_count += field.count(c) # comparison must take into account fieldname length + one space # + 2 quotes (eg. msgid "<string>") flength = len(fieldname) + 3 if plural_index: flength += len(plural_index) real_wrapwidth = wrapwidth - flength + specialchars_count if wrapwidth > 0 and len(field) > real_wrapwidth: # Wrap the line but take field name into account lines = [''] + [ unescape(item) for item in wrap( escaped_field, wrapwidth - 2, # 2 for quotes "" drop_whitespace=False, break_long_words=False, ) ] else: lines = [field] if fieldname.startswith('previous_'): # quick and dirty trick to get the real field name fieldname = fieldname[9:] ret = [ '%s%s%s "%s"' % (delflag, fieldname, plural_index, escape(lines.pop(0))) ] for line in lines: ret.append('%s"%s"' % (delflag, escape(line))) return ret # }}} # class POEntry {{{ class POEntry(_BaseEntry): """ Represents a po file entry. """ def __init__(self, *args, **kwargs): """ Constructor, accepts the following keyword arguments: ``comment`` string, the entry comment. ``tcomment`` string, the entry translator comment. ``occurrences`` list, the entry occurrences. ``flags`` list, the entry flags. ``previous_msgctxt`` string, the entry previous context. ``previous_msgid`` string, the entry previous msgid. ``previous_msgid_plural`` string, the entry previous msgid_plural. ``linenum`` integer, the line number of the entry """ _BaseEntry.__init__(self, *args, **kwargs) self.comment = kwargs.get('comment', '') self.tcomment = kwargs.get('tcomment', '') self.occurrences = kwargs.get('occurrences', []) self.flags = kwargs.get('flags', []) self.previous_msgctxt = kwargs.get('previous_msgctxt', None) self.previous_msgid = kwargs.get('previous_msgid', None) self.previous_msgid_plural = kwargs.get('previous_msgid_plural', None) self.linenum = kwargs.get('linenum', None) def __unicode__(self, wrapwidth=78): """ Returns the unicode representation of the entry. """ if self.obsolete: return _BaseEntry.__unicode__(self, wrapwidth) ret = [] # comments first, if any (with text wrapping as xgettext does) comments = [('comment', '#. '), ('tcomment', '# ')] for c in comments: val = getattr(self, c[0]) if val: for comment in val.split('\n'): if wrapwidth > 0 and len(comment) + len(c[1]) > wrapwidth: ret += wrap( comment, wrapwidth, initial_indent=c[1], subsequent_indent=c[1], break_long_words=False, ) else: ret.append('%s%s' % (c[1], comment)) # occurrences (with text wrapping as xgettext does) if self.occurrences: filelist = [] for fpath, lineno in self.occurrences: if lineno: filelist.append('%s:%s' % (fpath, lineno)) else: filelist.append(fpath) filestr = ' '.join(filelist) if wrapwidth > 0 and len(filestr) + 3 > wrapwidth: # textwrap split words that contain hyphen, this is not # what we want for filenames, so the dirty hack is to # temporally replace hyphens with a char that a file cannot # contain, like "*" ret += [ l.replace('*', '-') for l in wrap( filestr.replace('-', '*'), wrapwidth, initial_indent='#: ', subsequent_indent='#: ', break_long_words=False, ) ] else: ret.append('#: ' + filestr) # flags (TODO: wrapping ?) if self.flags: ret.append('#, %s' % ', '.join(self.flags)) # previous context and previous msgid/msgid_plural fields = ['previous_msgctxt', 'previous_msgid', 'previous_msgid_plural'] for f in fields: val = getattr(self, f) if val: ret += self._str_field(f, "#| ", "", val, wrapwidth) ret.append(_BaseEntry.__unicode__(self, wrapwidth)) ret = u('\n').join(ret) assert isinstance(ret, text_type) # if type(ret) != types.UnicodeType: # return unicode(ret, self.encoding) return ret def __cmp__(self, other): """ Called by comparison operations if rich comparison is not defined. """ # First: Obsolete test if self.obsolete != other.obsolete: if self.obsolete: return -1 else: return 1 # Work on a copy to protect original occ1 = sorted(self.occurrences[:]) occ2 = sorted(other.occurrences[:]) pos = 0 for entry1 in occ1: try: entry2 = occ2[pos] except IndexError: return 1 pos = pos + 1 if entry1[0] != entry2[0]: if entry1[0] > entry2[0]: return 1 else: return -1 if entry1[1] != entry2[1]: if entry1[1] > entry2[1]: return 1 else: return -1 # Compare msgid_plural if set if self.msgid_plural: if not other.msgid_plural: return 1 for pos in self.msgid_plural: if pos not in other.msgid_plural: return 1 if self.msgid_plural[pos] > other.msgid_plural[pos]: return 1 if self.msgid_plural[pos] < other.msgid_plural[pos]: return -1 # Finally: Compare message ID if self.msgid > other.msgid: return 1 elif self.msgid < other.msgid: return -1 return 0 def __gt__(self, other): return self.__cmp__(other) > 0 def __lt__(self, other): return self.__cmp__(other) < 0 def __ge__(self, other): return self.__cmp__(other) >= 0 def __le__(self, other): return self.__cmp__(other) <= 0 def __eq__(self, other): return self.__cmp__(other) == 0 def __ne__(self, other): return self.__cmp__(other) != 0 def translated(self): """ Returns ``True`` if the entry has been translated or ``False`` otherwise. """ if self.obsolete or 'fuzzy' in self.flags: return False if self.msgstr != '': return True if self.msgstr_plural: for pos in self.msgstr_plural: if self.msgstr_plural[pos] == '': return False return True return False def merge(self, other): """ Merge the current entry with the given pot entry. """ self.msgid = other.msgid self.msgctxt = other.msgctxt self.occurrences = other.occurrences self.comment = other.comment fuzzy = 'fuzzy' in self.flags self.flags = other.flags[:] # clone flags if fuzzy: self.flags.append('fuzzy') self.msgid_plural = other.msgid_plural self.obsolete = other.obsolete self.previous_msgctxt = other.previous_msgctxt self.previous_msgid = other.previous_msgid self.previous_msgid_plural = other.previous_msgid_plural if other.msgstr_plural: for pos in other.msgstr_plural: try: # keep existing translation at pos if any self.msgstr_plural[pos] except KeyError: self.msgstr_plural[pos] = '' def __hash__(self): return hash((self.msgid, self.msgstr)) # }}} # class MOEntry {{{ class MOEntry(_BaseEntry): """ Represents a mo file entry. """ def __init__(self, *args, **kwargs): """ Constructor, accepts the following keyword arguments, for consistency with :class:`~polib.POEntry`: ``comment`` ``tcomment`` ``occurrences`` ``flags`` ``previous_msgctxt`` ``previous_msgid`` ``previous_msgid_plural`` Note: even though these keyword arguments are accepted, they hold no real meaning in the context of MO files and are simply ignored. """ _BaseEntry.__init__(self, *args, **kwargs) self.comment = '' self.tcomment = '' self.occurrences = [] self.flags = [] self.previous_msgctxt = None self.previous_msgid = None self.previous_msgid_plural = None def __hash__(self): return hash((self.msgid, self.msgstr)) # }}} # class _POFileParser {{{ class _POFileParser(object): """ A finite state machine to parse efficiently and correctly po file format. """ def __init__(self, pofile, *args, **kwargs): """ Constructor. Keyword arguments: ``pofile`` string, path to the po file or its content ``encoding`` string, the encoding to use, defaults to ``default_encoding`` global variable (optional). ``check_for_duplicates`` whether to check for duplicate entries when adding entries to the file (optional, default: ``False``). """ enc = kwargs.get('encoding', default_encoding) if _is_file(pofile): try: self.fhandle = io.open(pofile, 'rt', encoding=enc) except LookupError: enc = default_encoding self.fhandle = io.open(pofile, 'rt', encoding=enc) else: self.fhandle = pofile.splitlines() klass = kwargs.get('klass') if klass is None: klass = POFile self.instance = klass( pofile=pofile, encoding=enc, check_for_duplicates=kwargs.get('check_for_duplicates', False), ) self.transitions = {} self.current_line = 0 self.current_entry = POEntry(linenum=self.current_line) self.current_state = 'st' self.current_token = None # two memo flags used in handlers self.msgstr_index = 0 self.entry_obsolete = 0 # Configure the state machine, by adding transitions. # Signification of symbols: # * ST: Beginning of the file (start) # * HE: Header # * TC: a translation comment # * GC: a generated comment # * OC: a file/line occurrence # * FL: a flags line # * CT: a message context # * PC: a previous msgctxt # * PM: a previous msgid # * PP: a previous msgid_plural # * MI: a msgid # * MP: a msgid plural # * MS: a msgstr # * MX: a msgstr plural # * MC: a msgid or msgstr continuation line all = [ 'st', 'he', 'gc', 'oc', 'fl', 'ct', 'pc', 'pm', 'pp', 'tc', 'ms', 'mp', 'mx', 'mi', ] self.add('tc', ['st', 'he'], 'he') self.add( 'tc', ['gc', 'oc', 'fl', 'tc', 'pc', 'pm', 'pp', 'ms', 'mp', 'mx', 'mi'], 'tc', ) self.add('gc', all, 'gc') self.add('oc', all, 'oc') self.add('fl', all, 'fl') self.add('pc', all, 'pc') self.add('pm', all, 'pm') self.add('pp', all, 'pp') self.add( 'ct', ['st', 'he', 'gc', 'oc', 'fl', 'tc', 'pc', 'pm', 'pp', 'ms', 'mx'], 'ct', ) self.add( 'mi', [ 'st', 'he', 'gc', 'oc', 'fl', 'ct', 'tc', 'pc', 'pm', 'pp', 'ms', 'mx', ], 'mi', ) self.add('mp', ['tc', 'gc', 'pc', 'pm', 'pp', 'mi'], 'mp') self.add('ms', ['mi', 'mp', 'tc'], 'ms') self.add('mx', ['mi', 'mx', 'mp', 'tc'], 'mx') self.add('mc', ['ct', 'mi', 'mp', 'ms', 'mx', 'pm', 'pp', 'pc'], 'mc') def parse(self): """ Run the state machine, parse the file line by line and call process() with the current matched symbol. """ keywords = { 'msgctxt': 'ct', 'msgid': 'mi', 'msgstr': 'ms', 'msgid_plural': 'mp', } prev_keywords = { 'msgid_plural': 'pp', 'msgid': 'pm', 'msgctxt': 'pc', } tokens = [] for line in self.fhandle: self.current_line += 1 line = line.strip() if line == '': continue tokens = line.split(None, 2) nb_tokens = len(tokens) if tokens[0] == '#~|': continue if tokens[0] == '#~' and nb_tokens > 1: line = line[3:].strip() tokens = tokens[1:] nb_tokens -= 1 self.entry_obsolete = 1 else: self.entry_obsolete = 0 # Take care of keywords like # msgid, msgid_plural, msgctxt & msgstr. if tokens[0] in keywords and nb_tokens > 1: line = line[len(tokens[0]) :].lstrip() if re.search(r'([^\\]|^)"', line[1:-1]): raise IOError( 'Syntax error in po file %s (line %s): ' 'unescaped double quote found' % (self.instance.fpath, self.current_line) ) self.current_token = line self.process(keywords[tokens[0]]) continue self.current_token = line if tokens[0] == '#:': if nb_tokens <= 1: continue # we are on a occurrences line self.process('oc') elif line[:1] == '"': # we are on a continuation line if re.search(r'([^\\]|^)"', line[1:-1]): raise IOError( 'Syntax error in po file %s (line %s): ' 'unescaped double quote found' % (self.instance.fpath, self.current_line) ) self.process('mc') elif line[:7] == 'msgstr[': # we are on a msgstr plural self.process('mx') elif tokens[0] == '#,': if nb_tokens <= 1: continue # we are on a flags line self.process('fl') elif tokens[0] == '#' or tokens[0].startswith('##'): if line == '#': line += ' ' # we are on a translator comment line self.process('tc') elif tokens[0] == '#.': if nb_tokens <= 1: continue # we are on a generated comment line self.process('gc') elif tokens[0] == '#|': if nb_tokens <= 1: raise IOError( 'Syntax error in po file %s (line %s)' % (self.instance.fpath, self.current_line) ) # Remove the marker and any whitespace right after that. line = line[2:].lstrip() self.current_token = line if tokens[1].startswith('"'): # Continuation of previous metadata. self.process('mc') continue if nb_tokens == 2: # Invalid continuation line. raise IOError( 'Syntax error in po file %s (line %s): ' 'invalid continuation line' % (self.instance.fpath, self.current_line) ) # we are on a "previous translation" comment line, if tokens[1] not in prev_keywords: # Unknown keyword in previous translation comment. raise IOError( 'Syntax error in po file %s (line %s): ' 'unknown keyword %s' % (self.instance.fpath, self.current_line, tokens[1]) ) # Remove the keyword and any whitespace # between it and the starting quote. line = line[len(tokens[1]) :].lstrip() self.current_token = line self.process(prev_keywords[tokens[1]]) else: raise IOError( 'Syntax error in po file %s (line %s)' % (self.instance.fpath, self.current_line) ) if ( self.current_entry and len(tokens) > 0 and not tokens[0].startswith('#') ): # since entries are added when another entry is found, we must add # the last entry here (only if there are lines). Trailing comments # are ignored self.instance.append(self.current_entry) # before returning the instance, check if there's metadata and if # so extract it in a dict metadataentry = self.instance.find('') if metadataentry: # metadata found # remove the entry self.instance.remove(metadataentry) self.instance.metadata_is_fuzzy = metadataentry.flags key = None for msg in metadataentry.msgstr.splitlines(): try: key, val = msg.split(':', 1) self.instance.metadata[key] = val.strip() except (ValueError, KeyError): if key is not None: self.instance.metadata[key] += '\n' + msg.strip() # close opened file if not isinstance(self.fhandle, list): # must be file self.fhandle.close() return self.instance def add(self, symbol, states, next_state): """ Add a transition to the state machine. Keywords arguments: ``symbol`` string, the matched token (two chars symbol). ``states`` list, a list of states (two chars symbols). ``next_state`` the next state the fsm will have after the action. """ for state in states: action = getattr(self, 'handle_%s' % next_state) self.transitions[(symbol, state)] = (action, next_state) def process(self, symbol): """ Process the transition corresponding to the current state and the symbol provided. Keywords arguments: ``symbol`` string, the matched token (two chars symbol). ``linenum`` integer, the current line number of the parsed file. """ try: (action, state) = self.transitions[(symbol, self.current_state)] if action(): self.current_state = state except Exception: raise IOError( 'Syntax error in po file (line %s)' % self.current_line ) # state handlers def handle_he(self): """Handle a header comment.""" if self.instance.header != '': self.instance.header += '\n' self.instance.header += self.current_token[2:] return 1 def handle_tc(self): """Handle a translator comment.""" if self.current_state in ['mc', 'ms', 'mx']: self.instance.append(self.current_entry) self.current_entry = POEntry(linenum=self.current_line) if self.current_entry.tcomment != '': self.current_entry.tcomment += '\n' tcomment = self.current_token.lstrip('#') if tcomment.startswith(' '): tcomment = tcomment[1:] self.current_entry.tcomment += tcomment return True def handle_gc(self): """Handle a generated comment.""" if self.current_state in ['mc', 'ms', 'mx']: self.instance.append(self.current_entry) self.current_entry = POEntry(linenum=self.current_line) if self.current_entry.comment != '': self.current_entry.comment += '\n' self.current_entry.comment += self.current_token[3:] return True def handle_oc(self): """Handle a file:num occurrence.""" if self.current_state in ['mc', 'ms', 'mx']: self.instance.append(self.current_entry) self.current_entry = POEntry(linenum=self.current_line) occurrences = self.current_token[3:].split() for occurrence in occurrences: if occurrence != '': try: fil, line = occurrence.split(':') if not line.isdigit(): fil = fil + line line = '' self.current_entry.occurrences.append((fil, line)) except (ValueError, AttributeError): self.current_entry.occurrences.append((occurrence, '')) return True def handle_fl(self): """Handle a flags line.""" if self.current_state in ['mc', 'ms', 'mx']: self.instance.append(self.current_entry) self.current_entry = POEntry(linenum=self.current_line) self.current_entry.flags += [ c.strip() for c in self.current_token[3:].split(',') ] return True def handle_pp(self): """Handle a previous msgid_plural line.""" if self.current_state in ['mc', 'ms', 'mx']: self.instance.append(self.current_entry) self.current_entry = POEntry(linenum=self.current_line) self.current_entry.previous_msgid_plural = unescape( self.current_token[1:-1] ) return True def handle_pm(self): """Handle a previous msgid line.""" if self.current_state in ['mc', 'ms', 'mx']: self.instance.append(self.current_entry) self.current_entry = POEntry(linenum=self.current_line) self.current_entry.previous_msgid = unescape(self.current_token[1:-1]) return True def handle_pc(self): """Handle a previous msgctxt line.""" if self.current_state in ['mc', 'ms', 'mx']: self.instance.append(self.current_entry) self.current_entry = POEntry(linenum=self.current_line) self.current_entry.previous_msgctxt = unescape(self.current_token[1:-1]) return True def handle_ct(self): """Handle a msgctxt.""" if self.current_state in ['mc', 'ms', 'mx']: self.instance.append(self.current_entry) self.current_entry = POEntry(linenum=self.current_line) self.current_entry.msgctxt = unescape(self.current_token[1:-1]) return True def handle_mi(self): """Handle a msgid.""" if self.current_state in ['mc', 'ms', 'mx']: self.instance.append(self.current_entry) self.current_entry = POEntry(linenum=self.current_line) self.current_entry.obsolete = self.entry_obsolete self.current_entry.msgid = unescape(self.current_token[1:-1]) return True def handle_mp(self): """Handle a msgid plural.""" self.current_entry.msgid_plural = unescape(self.current_token[1:-1]) return True def handle_ms(self): """Handle a msgstr.""" self.current_entry.msgstr = unescape(self.current_token[1:-1]) return True def handle_mx(self): """Handle a msgstr plural.""" index = self.current_token[7] value = self.current_token[self.current_token.find('"') + 1 : -1] self.current_entry.msgstr_plural[int(index)] = unescape(value) self.msgstr_index = int(index) return True def handle_mc(self): """Handle a msgid or msgstr continuation line.""" token = unescape(self.current_token[1:-1]) if self.current_state == 'ct': self.current_entry.msgctxt += token elif self.current_state == 'mi': self.current_entry.msgid += token elif self.current_state == 'mp': self.current_entry.msgid_plural += token elif self.current_state == 'ms': self.current_entry.msgstr += token elif self.current_state == 'mx': self.current_entry.msgstr_plural[self.msgstr_index] += token elif self.current_state == 'pp': self.current_entry.previous_msgid_plural += token elif self.current_state == 'pm': self.current_entry.previous_msgid += token elif self.current_state == 'pc': self.current_entry.previous_msgctxt += token # don't change the current state return False # }}} # class _MOFileParser {{{ class _MOFileParser(object): """ A class to parse binary mo files. """ def __init__(self, mofile, *args, **kwargs): """ Constructor. Keyword arguments: ``mofile`` string, path to the mo file or its content ``encoding`` string, the encoding to use, defaults to ``default_encoding`` global variable (optional). ``check_for_duplicates`` whether to check for duplicate entries when adding entries to the file (optional, default: ``False``). """ self.fhandle = open(mofile, 'rb') klass = kwargs.get('klass') if klass is None: klass = MOFile self.instance = klass( fpath=mofile, encoding=kwargs.get('encoding', default_encoding), check_for_duplicates=kwargs.get('check_for_duplicates', False), ) def __del__(self): """ Make sure the file is closed, this prevents warnings on unclosed file when running tests with python >= 3.2. """ if self.fhandle: self.fhandle.close() def parse(self): """ Build the instance with the file handle provided in the constructor. """ # parse magic number magic_number = self._readbinary('<I', 4) if magic_number == MOFile.MAGIC: ii = '<II' elif magic_number == MOFile.MAGIC_SWAPPED: ii = '>II' else: raise IOError('Invalid mo file, magic number is incorrect !') self.instance.magic_number = magic_number # parse the version number and the number of strings version, numofstrings = self._readbinary(ii, 8) # from MO file format specs: "A program seeing an unexpected major # revision number should stop reading the MO file entirely" if version not in (0, 1): raise IOError('Invalid mo file, unexpected major revision number') self.instance.version = version # original strings and translation strings hash table offset msgids_hash_offset, msgstrs_hash_offset = self._readbinary(ii, 8) # move to msgid hash table and read length and offset of msgids self.fhandle.seek(msgids_hash_offset) msgids_index = [] for i in range(numofstrings): msgids_index.append(self._readbinary(ii, 8)) # move to msgstr hash table and read length and offset of msgstrs self.fhandle.seek(msgstrs_hash_offset) msgstrs_index = [] for i in range(numofstrings): msgstrs_index.append(self._readbinary(ii, 8)) # build entries encoding = self.instance.encoding for i in range(numofstrings): self.fhandle.seek(msgids_index[i][1]) msgid = self.fhandle.read(msgids_index[i][0]) self.fhandle.seek(msgstrs_index[i][1]) msgstr = self.fhandle.read(msgstrs_index[i][0]) if i == 0 and not msgid: # metadata raw_metadata, metadata = msgstr.split(b('\n')), {} for line in raw_metadata: tokens = line.split(b(':'), 1) if tokens[0] != b(''): try: k = tokens[0].decode(encoding) v = tokens[1].decode(encoding) metadata[k] = v.strip() except IndexError: metadata[k] = u('') self.instance.metadata = metadata continue # test if we have a plural entry msgid_tokens = msgid.split(b('\0')) if len(msgid_tokens) > 1: entry = self._build_entry( msgid=msgid_tokens[0], msgid_plural=msgid_tokens[1], msgstr_plural={ k: v for k, v in enumerate(msgstr.split(b('\0'))) }, ) else: entry = self._build_entry(msgid=msgid, msgstr=msgstr) self.instance.append(entry) # close opened file self.fhandle.close() return self.instance def _build_entry( self, msgid, msgstr=None, msgid_plural=None, msgstr_plural=None ): msgctxt_msgid = msgid.split(b('\x04')) encoding = self.instance.encoding if len(msgctxt_msgid) > 1: kwargs = { 'msgctxt': msgctxt_msgid[0].decode(encoding), 'msgid': msgctxt_msgid[1].decode(encoding), } else: kwargs = {'msgid': msgid.decode(encoding)} if msgstr: kwargs['msgstr'] = msgstr.decode(encoding) if msgid_plural: kwargs['msgid_plural'] = msgid_plural.decode(encoding) if msgstr_plural: for k in msgstr_plural: msgstr_plural[k] = msgstr_plural[k].decode(encoding) kwargs['msgstr_plural'] = msgstr_plural return MOEntry(**kwargs) def _readbinary(self, fmt, numbytes): """ Private method that unpack n bytes of data using format <fmt>. It returns a tuple or a mixed value if the tuple length is 1. """ bytes = self.fhandle.read(numbytes) tup = struct.unpack(fmt, bytes) if len(tup) == 1: return tup[0] return tup # }}} # class TextWrapper {{{ class TextWrapper(textwrap.TextWrapper): """ Subclass of textwrap.TextWrapper that backport the drop_whitespace option. """ def __init__(self, *args, **kwargs): drop_whitespace = kwargs.pop('drop_whitespace', True) textwrap.TextWrapper.__init__(self, *args, **kwargs) self.drop_whitespace = drop_whitespace def _wrap_chunks(self, chunks): """_wrap_chunks(chunks : [string]) -> [string] Wrap a sequence of text chunks and return a list of lines of length 'self.width' or less. (If 'break_long_words' is false, some lines may be longer than this.) Chunks correspond roughly to words and the whitespace between them: each chunk is indivisible (modulo 'break_long_words'), but a line break can come between any two chunks. Chunks should not have internal whitespace; ie. a chunk is either all whitespace or a "word". Whitespace chunks will be removed from the beginning and end of lines, but apart from that whitespace is preserved. """ lines = [] if self.width <= 0: raise ValueError("invalid width %r (must be > 0)" % self.width) # Arrange in reverse order so items can be efficiently popped # from a stack of chucks. chunks.reverse() while chunks: # Start the list of chunks that will make up the current line. # cur_len is just the length of all the chunks in cur_line. cur_line = [] cur_len = 0 # Figure out which static string will prefix this line. if lines: indent = self.subsequent_indent else: indent = self.initial_indent # Maximum width for this line. width = self.width - len(indent) # First chunk on line is whitespace -- drop it, unless this # is the very beginning of the text (ie. no lines started yet). if self.drop_whitespace and chunks[-1].strip() == '' and lines: del chunks[-1] while chunks: l = len(chunks[-1]) # Can at least squeeze this chunk onto the current line. if cur_len + l <= width: cur_line.append(chunks.pop()) cur_len += l # Nope, this line is full. else: break # The current line is full, and the next chunk is too big to # fit on *any* line (not just this one). if chunks and len(chunks[-1]) > width: self._handle_long_word(chunks, cur_line, cur_len, width) # If the last chunk on this line is all whitespace, drop it. if self.drop_whitespace and cur_line and not cur_line[-1].strip(): del cur_line[-1] # Convert current line back to a string and store it in list # of all lines (return value). if cur_line: lines.append(indent + ''.join(cur_line)) return lines # }}} # function wrap() {{{ def wrap(text, width=70, **kwargs): """ Wrap a single paragraph of text, returning a list of wrapped lines. """ if sys.version_info < (2, 6): return TextWrapper(width=width, **kwargs).wrap(text) return textwrap.wrap(text, width=width, **kwargs) # }}}