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from __future__ import unicode_literals
import re
import warnings
from django.template.base import (
TOKEN_BLOCK, TOKEN_COMMENT, TOKEN_TEXT, TOKEN_VAR, TRANSLATOR_COMMENT_MARK,
Lexer,
)
from django.utils import six
from django.utils.encoding import force_text
from django.utils.six import StringIO
from . import TranslatorCommentWarning, trim_whitespace
dot_re = re.compile(r'\S')
def blankout(src, char):
"""
Change every non-whitespace character to the given char.
Used in the templatize function.
"""
return dot_re.sub(char, src)
context_re = re.compile(r"""^\s+.*context\s+((?:"[^"]*?")|(?:'[^']*?'))\s*""")
inline_re = re.compile(
# Match the trans 'some text' part
r"""^\s*trans\s+((?:"[^"]*?")|(?:'[^']*?'))"""
# Match and ignore optional filters
r"""(?:\s*\|\s*[^\s:]+(?::(?:[^\s'":]+|(?:"[^"]*?")|(?:'[^']*?')))?)*"""
# Match the optional context part
r"""(\s+.*context\s+((?:"[^"]*?")|(?:'[^']*?')))?\s*"""
)
block_re = re.compile(r"""^\s*blocktrans(\s+.*context\s+((?:"[^"]*?")|(?:'[^']*?')))?(?:\s+|$)""")
endblock_re = re.compile(r"""^\s*endblocktrans$""")
plural_re = re.compile(r"""^\s*plural$""")
constant_re = re.compile(r"""_\(((?:".*?")|(?:'.*?'))\)""")
def templatize(src, origin=None, charset='utf-8'):
"""
Turn a Django template into something that is understood by xgettext. It
does so by translating the Django translation tags into standard gettext
function invocations.
"""
src = force_text(src, charset)
out = StringIO('')
message_context = None
intrans = False
inplural = False
trimmed = False
singular = []
plural = []
incomment = False
comment = []
lineno_comment_map = {}
comment_lineno_cache = None
# Adding the u prefix allows gettext to recognize the Unicode string
# (#26093).
raw_prefix = 'u' if six.PY3 else ''
def join_tokens(tokens, trim=False):
message = ''.join(tokens)
if trim:
message = trim_whitespace(message)
return message
for t in Lexer(src).tokenize():
if incomment:
if t.token_type == TOKEN_BLOCK and t.contents == 'endcomment':
content = ''.join(comment)
translators_comment_start = None
for lineno, line in enumerate(content.splitlines(True)):
if line.lstrip().startswith(TRANSLATOR_COMMENT_MARK):
translators_comment_start = lineno
for lineno, line in enumerate(content.splitlines(True)):
if translators_comment_start is not None and lineno >= translators_comment_start:
out.write(' # %s' % line)
else:
out.write(' #\n')
incomment = False
comment = []
else:
comment.append(t.contents)
elif intrans:
if t.token_type == TOKEN_BLOCK:
endbmatch = endblock_re.match(t.contents)
pluralmatch = plural_re.match(t.contents)
if endbmatch:
if inplural:
if message_context:
out.write(' npgettext({p}{!r}, {p}{!r}, {p}{!r},count) '.format(
message_context,
join_tokens(singular, trimmed),
join_tokens(plural, trimmed),
p=raw_prefix,
))
else:
out.write(' ngettext({p}{!r}, {p}{!r}, count) '.format(
join_tokens(singular, trimmed),
join_tokens(plural, trimmed),
p=raw_prefix,
))
for part in singular:
out.write(blankout(part, 'S'))
for part in plural:
out.write(blankout(part, 'P'))
else:
if message_context:
out.write(' pgettext({p}{!r}, {p}{!r}) '.format(
message_context,
join_tokens(singular, trimmed),
p=raw_prefix,
))
else:
out.write(' gettext({p}{!r}) '.format(
join_tokens(singular, trimmed),
p=raw_prefix,
))
for part in singular:
out.write(blankout(part, 'S'))
message_context = None
intrans = False
inplural = False
singular = []
plural = []
elif pluralmatch:
inplural = True
else:
filemsg = ''
if origin:
filemsg = 'file %s, ' % origin
raise SyntaxError(
"Translation blocks must not include other block tags: "
"%s (%sline %d)" % (t.contents, filemsg, t.lineno)
)
elif t.token_type == TOKEN_VAR:
if inplural:
plural.append('%%(%s)s' % t.contents)
else:
singular.append('%%(%s)s' % t.contents)
elif t.token_type == TOKEN_TEXT:
contents = t.contents.replace('%', '%%')
if inplural:
plural.append(contents)
else:
singular.append(contents)
else:
# Handle comment tokens (`{# ... #}`) plus other constructs on
# the same line:
if comment_lineno_cache is not None:
cur_lineno = t.lineno + t.contents.count('\n')
if comment_lineno_cache == cur_lineno:
if t.token_type != TOKEN_COMMENT:
for c in lineno_comment_map[comment_lineno_cache]:
filemsg = ''
if origin:
filemsg = 'file %s, ' % origin
warn_msg = (
"The translator-targeted comment '%s' "
"(%sline %d) was ignored, because it wasn't "
"the last item on the line."
) % (c, filemsg, comment_lineno_cache)
warnings.warn(warn_msg, TranslatorCommentWarning)
lineno_comment_map[comment_lineno_cache] = []
else:
out.write('# %s' % ' | '.join(lineno_comment_map[comment_lineno_cache]))
comment_lineno_cache = None
if t.token_type == TOKEN_BLOCK:
imatch = inline_re.match(t.contents)
bmatch = block_re.match(t.contents)
cmatches = constant_re.findall(t.contents)
if imatch:
g = imatch.group(1)
if g[0] == '"':
g = g.strip('"')
elif g[0] == "'":
g = g.strip("'")
g = g.replace('%', '%%')
if imatch.group(2):
# A context is provided
context_match = context_re.match(imatch.group(2))
message_context = context_match.group(1)
if message_context[0] == '"':
message_context = message_context.strip('"')
elif message_context[0] == "'":
message_context = message_context.strip("'")
out.write(' pgettext({p}{!r}, {p}{!r}) '.format(
message_context, g, p=raw_prefix
))
message_context = None
else:
out.write(' gettext({p}{!r}) '.format(g, p=raw_prefix))
elif bmatch:
for fmatch in constant_re.findall(t.contents):
out.write(' _(%s) ' % fmatch)
if bmatch.group(1):
# A context is provided
context_match = context_re.match(bmatch.group(1))
message_context = context_match.group(1)
if message_context[0] == '"':
message_context = message_context.strip('"')
elif message_context[0] == "'":
message_context = message_context.strip("'")
intrans = True
inplural = False
trimmed = 'trimmed' in t.split_contents()
singular = []
plural = []
elif cmatches:
for cmatch in cmatches:
out.write(' _(%s) ' % cmatch)
elif t.contents == 'comment':
incomment = True
else:
out.write(blankout(t.contents, 'B'))
elif t.token_type == TOKEN_VAR:
parts = t.contents.split('|')
cmatch = constant_re.match(parts[0])
if cmatch:
out.write(' _(%s) ' % cmatch.group(1))
for p in parts[1:]:
if p.find(':_(') >= 0:
out.write(' %s ' % p.split(':', 1)[1])
else:
out.write(blankout(p, 'F'))
elif t.token_type == TOKEN_COMMENT:
if t.contents.lstrip().startswith(TRANSLATOR_COMMENT_MARK):
lineno_comment_map.setdefault(t.lineno, []).append(t.contents)
comment_lineno_cache = t.lineno
else:
out.write(blankout(t.contents, 'X'))
return out.getvalue()
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