Warning, file /sdk/kde-dev-scripts/kf5/resolve_kuit.py was not indexed or was modified since last indexation (in which case cross-reference links may be missing, inaccurate or erroneous).

 #!/usr/bin/env python
 # -*- coding: UTF-8 -*-
 
 # Resolve KUIT markup in i18n strings into plain or rich text,
 # or switch them to xi18n calls.
 #
 # Usage:
 #   resolve_kuit.py [OPTIONS] FILE_OR_DIRECTORY...
 #
 # By default, KUIT markup is resolved into plain or rich text.
 # To switch strings containing any KUIT markup to xi18n calls instead,
 # use -x option; to switch all strings to xi18n calls, use -X option.
 # For non-code files (.ui, .rc, etc.) -x behaves same like -X,
 # since there is no way to specify by string whether it is to be
 # passed through i18n or xi18n call at runtime. Instead this is specified
 # on the top level (per file, but normally for all such files in a project),
 # as described in the "Connecting Calls to Catalogs" section
 # of the ki18n Programmer's Guide.
 #
 # Files are modified in-place. Modified file paths are written to stdout.
 # If an argument is a directory, files from it are recursivelly collected.
 # Only files with known extensions are processed (even if file with unknown
 # extension is given directly in the command line, it will be ignored).
 # The list of known extensions by resolution type can be listed with
 # -k option. Option -s RESTYPE:EXT1[,EXT2...] can be used to register
 # additional extensions (without leading dot, case ignored) for given
 # resolution type. One extension may have several resolution types.
 # Files in version control bookkeeping directories are skipped.
 #
 # In C-like function call files (resolution type 'ccall'),
 # i18n strings are detected as arguments in calls with
 # *i18n, *i18nc, *i18np, and *i18ncp function names.
 # By default detection considers string arguments to be either single or
 # double quoted, call arguments can be split into several lines, and
 # strings are concatenated when separated only by whitespace.
 # Default set of quotes can be replaced by repeating the -q QUOTE option.
 #
 # In XML-like markup files (resolution type 'xml'),
 # i18n strings are detected as element texts, for a certain set of tags.
 # i18n contexts are detected as attributes to those elements, for a certain
 # set of attributes. These sets can be expanded using -T TAG1[,TAG2...]
 # and -A ATTR1[,ATTR2...] options. Case is ignored for both.
 # Markup inside the element text is expected to be XML-escaped (<, etc.),
 # i.e. the element text is first unescaped before resolution.
 #
 # In PO files (resolution type 'po'), i18n strings are detected
 # according to PO format.
 # To process PO files, the Pology library must be ready for use.
 # In msgstr fields, KUIT markup transformations for given language
 # are looked up in its kdelibs4.po. The pattern path to kdelibs4.po files,
 # which contains @lang@ placeholder, is given with -t PATTERN option.
 # This can be a local path or a HTTP URL (e.g.
 # https://websvn.kde.org/*checkout*/trunk/l10n-kde4/@lang@/messages/kdelibs/kdelibs4.po ).
 # Language of processed PO file is determined from its Language: header field.
 # If only PO files of one language are processed and they do not reliably
 # contain this field, the language can be forced with -l LANG option.
 # By default both the original and the translation fields are resolved,
 # which is appropriate when the PO file is being resolved before
 # it has been merged with new template resulting from the resolved code.
 # If an unresolved PO file has been merged with new template first,
 # then option -m should be issued to resolve only the translation fields.
 # In this case, on fuzzy messages, if previous original fields (which are
 # also resolved) and current original fields match after resolution,
 # the message is unfuzzied.
 #
 # For a given i18n string, the decision of whether to resolve KUIT markup
 # into plain or Qt rich text is made based on the context marker,
 # as described in KUIT documentation at
 # https://techbase.kde.org/Development/Tutorials/Localization/i18n_Semantics .
 # Target formats can also be manually specified for certain context markers
 # by repeating the -f option. E.g. -f @info:progress=rich would override
 # the default resolution into plain text for @info:progress i18n strings.
 #
 # NOTE: [INTERNAL]
 # If <html> tags are added on rich text(see top_tag_res variable),
 # then resolution must not be run over already resolved files.
 # Context markers will remain but format modifiers will be removed from them,
 # which may cause further modification in the second run.
 #
 # NOTE: [INTERNAL]
 # If <numid> tags are simply removed (see numid_tag_res variable),
 # a warning is issued on each removal to do something manually with
 # its associated argument, e.g. wrap it in QString::number().
 # It is probably best to look for <numid> tags and handle their arguments
 # before running the resolution.
 
 import locale
 import optparse
 import os
 import re
 import sys
 
 
 def main ():
 
     opars = optparse.OptionParser(
         usage="%prog FILE_OR_DIRECTORY...",
         description="Resolve KUIT markup in i18n strings. "
                     "Files are recursively searched for, "
                     "and modified in place. "
                     "C-like i18n calls are looked for in all files, "
                     "except in PO files which are specially treated. "
                     "WARNING: Do not run twice over same files.")
     opars.add_option(
         "-x",
         dest="switch_to_xi18n", action="store_const", default=0, const=1,
         help="Instead of resolving markup, switch i18n calls having "
              "some markup to xi18n calls.")
     opars.add_option(
         "-X",
         dest="switch_to_xi18n", action="store_const", default=0, const=2,
         help="Instead of resolving markup, switch all i18n calls "
              "to xi18n calls.")
     opars.add_option(
         "-f",
         dest="formats", action="append", default=[],
         metavar="MARKER=FORMAT",
         help="Set resolution into given target format for "
              "strings with this context marker. "
              "Target format can be one of: plain, rich. "
              "Option can be repeated.")
     opars.add_option(
         "-q",
         dest="quotes", action="append", default=[],
         metavar="QUOTE",
         help="Set opening and closing quote for string arguments "
              "in '%s' resolution type. "
              "Default is single and double quote. "
              "Option can be repeated." % "ccall")
     opars.add_option(
         "-s",
         dest="add_restype_exts", action="append", default=[],
         metavar="RESTYPE:EXT1[,EXT2...]",
         help="Set additional file name extension for given resolution type. "
              "Option can be repeated.")
     opars.add_option(
         "-T",
         dest="add_xml_texttags", action="store", default=None,
         metavar="TAG1[,TAG2...]",
         help="Set additional tags from which to collect text "
              "in '%s' resolution type." % "xml")
     opars.add_option(
         "-A",
         dest="add_xml_ctxtattrs", action="store", default=None,
         metavar="ATTR1[,ATTR2...]",
         help="Set additional attributes to consider as containing "
              "context in '%s' resolution type." % "xml")
     opars.add_option(
         "-t",
         dest="kdelibs4_path_pattern", action="store", default=None,
         metavar="PATH_PATTERN",
         help="The path pattern to kdelibs4.po files, "
              "which contains @lang@ placeholder. "
              "It can be a local path or HTTP URL. "
              "Needed only when processing PO files.")
     opars.add_option(
         "-l",
         dest="kdelibs4_lang", action="store", default=None,
         metavar="LANG",
         help="The language code of translated text in processed PO files, "
              "if it cannot be determined reliably from PO headers. "
              "When this option is in effect, PO files of exactly "
              "one language of translation must be proceesed.")
     opars.add_option(
         "-w",
         dest="msgfmt_wrap", action="store_true", default=False,
         help="Apply Gettext tools wrapping to PO files after resolving them.")
     opars.add_option(
         "-m",
         dest="post_merge", action="store_true", default=False,
         help="Resolve only translation fields in PO files. "
              "This is to be used when PO file is being resolved "
              "after it has been merged with template resulting "
              "from resolved code.")
     opars.add_option(
         "-I",
         dest="interface_wrap", action="store", default=None,
         metavar="HEAD_SEP",
         help="[undocumented]",
     )
     opars.add_option(
         "-k",
         dest="list_restypes", action="store_true", default=False,
         help="List known resolution types and associated file extensions. "
              "It will include additions by '%s' option." % "-s",
     )
 
     options, args = opars.parse_args()
 
     # Set additional resolution types.
     for rtextspec in options.add_restype_exts:
         lst = rtextspec.split(":", 1)
         if len(lst) != 2:
             raise StandardError(
                 "Resolution specification '%s' given in command line "
                 "is not valid." % rtextspec)
         rt, extspec = lst
         if rt not in _map_restype_ext:
             raise StandardError(
                 "Unknown resolution type '%s' in resolution specification '%s' "
                 "given in command line." % (rt, rtextspec))
         exts = [e.lower() for e in extspec.split(",")]
         _map_restype_ext[rt][0].update(exts)
     if options.list_restypes:
         for rt, (exts, rf, ons) in _map_restype_ext.items():
             report("%s: %s" % (rt, " ".join(sorted(exts))))
         exit(1)
 
     # Update target format by context marker specification.
     for fmtspec in options.formats:
         try:
             cmk, fmt = fmtspec.split("=", 1)
         except:
             raise StandardError(
                 "Invalid target format specification '%s' "
                 "given in command line." % fmtspec)
         if fmt not in _known_formats.values():
             raise StandardError(
                 "Unknown target format '%s' given in command line." % fmt)
         _cmarker_to_format[cmk] = fmt
 
     # Set KUIT resolving options.
     if options.kdelibs4_path_pattern:
         if "@lang@" not in options.kdelibs4_path_pattern:
             raise StandardError(
                 "Path pattern for kdelibs4.po files given in command line "
                 "does not contain %s placeholder." % "@lang@")
     _kuit_spec.kdelibs4_path_pattern = options.kdelibs4_path_pattern
     _kuit_spec.force_lang = options.kdelibs4_lang
     _kuit_spec.interface_wrap = options.interface_wrap
 
     # Set C-call resolving options.
     _ccall_options.switch_to_xi18n = options.switch_to_xi18n
     if options.quotes:
         squotes = list(reversed(sorted(options.quotes))) # longest first
         _ccall_options.quotes[:] = squotes
 
     # Set XML resolving options.
     _xml_options.switch_to_xi18n = options.switch_to_xi18n
     if options.add_xml_texttags:
         tags = options.add_xml_texttags.split(",")
         _xml_options.text_tags.update(tags)
     if options.add_xml_ctxtattrs:
         attrs = options.add_xml_ctxtattrs.split(",")
         _xml_options.ctxt_attrs[:0] = attrs # higher priority
 
     # Set PO resolving options.
     _po_options.switch_to_xi18n = options.switch_to_xi18n
     _po_options.msgfmt_wrap = options.msgfmt_wrap
     _po_options.post_merge = options.post_merge
 
     # Collect all files.
     file_paths = []
     for path in args:
         if os.path.isdir(path):
             for root, dirns, filens in os.walk(path):
                 for filen in filens:
                     file_paths.append(os.path.join(root, filen))
         elif os.path.isfile(path):
             file_paths.append(path)
         else:
             raise StandardError(
                 "Command line argument '%s' is neither a file "
                 "nor a directory." % path)
 
     # Filter out VCS bookkeeping.
     mod_file_paths = []
     vcs_dirns = set(["CVS", ".svn", ".git"])
     for fp in file_paths:
         els = set(fp.split(os.path.sep))
         if not els.intersection(vcs_dirns):
             mod_file_paths.append(fp)
     file_paths = mod_file_paths
 
     # Resolve files.
     file_paths.sort()
     test_encs = ["utf8", "iso8859-1", "iso8859-15", "cp1252"]
     for fp in file_paths:
         rspecs = get_resolvers_for_file(fp)
         modified = False
         for restype, resolvef, onstring in rspecs:
             if onstring:
                 fstr = open(fp, "rb").read()
                 badpos = -1
                 for fenc in test_encs:
                     try:
                         fstr = fstr.decode(fenc)
                     except UnicodeDecodeError, e:
                         if badpos < 0:
                             badpos = e.start
                     else:
                         badpos = -1
                         break
                 if badpos < 0:
                     res_fstr = resolvef(fstr, fp)
                     if res_fstr != fstr:
                         tmpfp = fp + "~tmp"
                         fh = open(tmpfp, "wb")
                         fh.write(res_fstr.encode("utf8"))
                         fh.close()
                         os.rename(tmpfp, fp)
                         modified = True
                 else:
                     warning("%s: Cannot decode file using any of "
                             "test encodings (UTF-8 try produces problem "
                             "in line %d, column %d), skipping it."
                             % (fp, lno_to(fstr, badpos), cno_to(fstr, badpos)))
             else:
                 if resolvef(fp):
                     modified = True
         if modified:
             report(fp)
 
 
 def report (msg):
 
     lenc = locale.getpreferredencoding()
     emsg = ("%s\n" % msg).encode(lenc)
     sys.stdout.write(emsg)
 
 
 def warning (msg):
 
     lenc = locale.getpreferredencoding()
     emsg = ("[warning] %s\n" % msg).encode(lenc)
     sys.stderr.write(emsg)
 
 
 class Data: pass
 _kuit_spec = Data()
 _kuit_spec.kdelibs4_path_pattern = None
 _kuit_spec.force_lang = None
 _kuit_spec.interface_wrap = None
 _kuit_spec.langdata = {}
 
 
 _space_in_place_tag_rx = re.compile(r"(<[^>]*\S)(/\s*>)", re.U | re.S)
 
 def get_language_data (lang):
 
     langdata = _kuit_spec.langdata.get(lang)
     if langdata:
         return langdata
 
     kl4cat = None
     if lang != "en_US":
         # Fetch kdelibs4.po for this catalog's language.
         if not _kuit_spec.kdelibs4_path_pattern:
             raise StandardError(
                 "Path pattern for kdelibs4.po not set (-t option).")
         kl4path = _kuit_spec.kdelibs4_path_pattern.replace("@lang@", lang)
         from urllib import urlopen
         kl4fh = urlopen(kl4path)
         from pology.catalog import Catalog
         kl4cat = Catalog("kdelibs4.po", readfh=kl4fh)
 
     langdata = Data()
 
     langdata.transform = {}
     for spec in _kuit_transforms.items():
         ktrkey, (msgctxt, msgid, subsmap, prepend, postpend, textmodf) = spec
         pattern = msgid
         if kl4cat is not None:
             msgs = kl4cat.select_by_key(msgctxt, msgid)
             if msgs and msgs[0].translated:
                 pattern = msgs[0].msgstr[0]
         fmt = ktrkey[2]
         if fmt == "rich":
             # Add space before /> in in-place closed rich-text tags,
             # as Qt may fail to guess format as rich-text otherwise.
             pattern = _space_in_place_tag_rx.sub(r"\1 \2", pattern)
         tr = Data()
         tr.pattern = pattern
         tr.subsmap = subsmap
         tr.prepend = prepend
         tr.postpend = postpend
         tr.textmodf = textmodf
         langdata.transform[ktrkey] = tr
 
     langdata.shcdelim = {}
     for spec in _kuit_shortcut_delimiters.items():
         fmt, (msgctxt, msgid) = spec
         delim = msgid
         if kl4cat is not None:
             msgs = kl4cat.select_by_key(msgctxt, msgid)
             if msgs and msgs[0].translated:
                 delim = msgs[0].msgstr[0]
         langdata.shcdelim[fmt] = delim
 
     langdata.keyname = {}
     for spec in _kuit_key_names:
         msgctxt, msgid = spec
         keyname = msgid
         if kl4cat is not None:
             msgs = kl4cat.select_by_key(msgctxt, msgid)
             if msgs and msgs[0].translated:
                 keyname = msgs[0].msgstr[0]
         langdata.keyname[msgid] = keyname
 
     langdata.guidelim = {}
     for spec in _kuit_guipath_delimiters.items():
         fmt, (msgctxt, msgid) = spec
         delim = msgid
         if kl4cat is not None:
             msgs = kl4cat.select_by_key(msgctxt, msgid)
             if msgs and msgs[0].translated:
                 delim = msgs[0].msgstr[0]
         langdata.guidelim[fmt] = delim
 
     langdata.ifacewrap = None
     if _kuit_spec.interface_wrap:
         langdata.ifacewrap = _kuit_spec.interface_wrap
 
     _kuit_spec.langdata[lang] = langdata
     return langdata
 
 
 def lno_to (fstr, p):
     lno = fstr.count("\n", 0, p) + 1
     return lno
 
 
 def cno_to (fstr, p):
     pb = fstr.rfind("\n", 0, p)
     # If no \n found, -1 is exactly what's needed below.
     cno = p - pb
     return cno
 
 
 _ccall_options = Data()
 
 # Call specification.
 _ccall_options.calls = {
     # "callname": (ctxt_pos, text_pos, plural_pos)
     "i18n": (-1, 0, -1),
     "i18nc": (0, 1, -1),
     "i18np": (-1, 0, 1),
     "i18ncp": (0, 1, 2),
     "ki18n": (-1, 0, -1),
     "ki18nc": (0, 1, -1),
     "ki18np": (-1, 0, 1),
     "ki18ncp": (0, 1, 2),
     "I18N_NOOP": (-1, 0, -1),
     "I18N_NOOP2": (0, 1, -1),
     "I18N_NOOP2_NOSTRIP": (0, 1, -1),
 }
 # Equip with total number of strings.
 _ccall_options.calls = dict([(cn, inds + (len([i for i in inds if i >= 0]),))
                              for cn, inds in _ccall_options.calls.items()])
 
 # Default string quotes (must be sorted from longest to shortest).
 _ccall_options.quotes = list(reversed(sorted([
     "\"",
     "'",
 ])))
 
 # To-EOL and delimited comments which may mingle with
 # concatenated string literals.
 _ccall_options.midcstr_eolcmnts = set([
     "//", "#",
 ])
 _ccall_options.midcstr_delimcmnts = set([
     ("/*", "*/"),
 ])
 
 _ccall_head_rx = re.compile(r"([\w\d_]+)\s*\(", re.U | re.S)
 _mask_chr = "\x04"
 _print_mask_chr = u"¬"
 
 def resolve_ccall (fstr, path):
 
     showparse = False
     if showparse:
         report("%s: >>>>> start >>>>>" % path)
 
     langdata = get_language_data("en_US")
     toxi18n = _ccall_options.switch_to_xi18n
 
     segs = []
     p1 = 0
     while True:
         m = _ccall_head_rx.search(fstr, p1)
         if not m:
             segs.append(fstr[p1:])
             break
         p2, p3 = m.span()
         callname = m.group(1)
         callspec = _ccall_options.calls.get(callname)
         if callspec:
             ictxt, itext, iplural, total = callspec
             p1a = p3
             argspecs = []
             all_strings = True
             end_call = False
             for k in range(total):
                 if showparse:
                     report("%s:%d: iarg=%d  spos=%d"
                            % (path, lno_to(fstr, p1a), k, p1a))
                 ret = _parse_cstr(fstr, p1a, (",", ")"), path,
                                   _ccall_options.midcstr_eolcmnts,
                                   _ccall_options.midcstr_delimcmnts)
                 if not ret:
                     all_strings = False
                     break
                 p2a, msarg, quote, outs = ret
                 argspecs.append((msarg, quote, outs))
                 p1a = p2a
                 if outs[-1].endswith(")"):
                     end_call = True
                     break
             if len(argspecs) == total:
                 if showparse:
                     report("%s:%d: call=[%s]%s"
                            % (path, lno_to(fstr, p3), callname,
                               "".join("{%s||%s}" % (_ppmasked(s[0]), s[1])
                                       for s in argspecs)))
                 csegs = []
                 lno = lno_to(fstr, p3)
                 mctxt = argspecs[ictxt][0] if ictxt >= 0 else None
                 res_callname = None
                 for iarg, (msarg, quote, outs) in enumerate(argspecs):
                     if iarg != ictxt:
                         ret = resolve_kuit(mctxt, msarg, quote,
                                            langdata, path, lno,
                                            toxi18n=toxi18n)
                         res_mctxt, res_msarg, xi18n = ret[:3]
                         if xi18n and not res_callname:
                             if callname.startswith("i"):
                                 res_callname = "x" + callname
                             elif callname.startswith("k"):
                                 res_callname = "kx" + callname[1:]
                         res_sarg = _unmask(res_msarg, outs)
                         csegs.append(res_sarg)
                     else:
                         csegs.append("")
                 if not res_callname:
                     res_callname = callname
                 if ictxt >= 0:
                     outs_ctxt = argspecs[ictxt][2]
                     res_ctxt = _unmask(res_mctxt, outs_ctxt)
                     csegs[ictxt] = res_ctxt
                 if showparse:
                     report("%s:%d: res-segs=%s"
                            % (path, lno_to(fstr, p3),
                               "".join("{%s}" % s for s in csegs)))
                 segs.append(fstr[p1:p2])
                 segs.append(res_callname)
                 segs.append(fstr[p2 + len(callname):p3])
                 segs.append("".join(csegs))
                 p3 = p1a
             elif all_strings and end_call:
                 if showparse:
                     report("%s:%d: bad-call" % (path, lno_to(fstr, p3)))
                 warning("%s:%d: Too little string arguments to call "
                         "(expected %d, got %d)."
                         % (path, lno_to(fstr, p3), total, len(argspecs)))
                 segs.append(fstr[p1:p3])
                 p3 = p1a
             else:
                 if showparse:
                     report("%s:%d: not-literal-call" % (path, lno_to(fstr, p3)))
                 segs.append(fstr[p1:p3])
         else:
             segs.append(fstr[p1:p3])
         p1 = p3
     res_fstr = "".join(segs)
     if showparse:
         report("%s: <<<<< end <<<<<" % path)
     return res_fstr
 
 
 def _ppmasked (s):
 
     return s.replace(_mask_chr, _print_mask_chr)
 
 
 def _unmask (ms, outs):
 
     segs = []
     p1 = 0
     io = 0
     while True:
         p2 = ms.find(_mask_chr, p1)
         if p2 < 0:
             segs.append(ms[p1:])
             break
         segs.append(ms[p1:p2])
         segs.append(outs[io])
         io += 1
         p1 = p2 + len(_mask_chr)
     s = "".join(segs)
     return s
 
 
 def _parse_cstr (fstr, spos, ends, path=None, eolcmnts=[], delimcmnts=[]):
 
     showparse = False
 
     l = len(fstr)
     p = spos
     if showparse:
         report("parse-cstr-start %d" % p)
     segs = []
     outs = []
     quote = None
     while True:
         pp = p
         while p < l and fstr[p].isspace():
             p += 1
         segs.append(_mask_chr)
         outs.append(fstr[pp:p])
         if p == l:
             break
         at_quote = False
         if quote is None:
             for q in _ccall_options.quotes:
                 if fstr[p:p + len(q)] == q:
                     at_quote = True
                     quote = q
                     lq = len(quote)
                     break
         else:
             if fstr[p:p + lq] == quote:
                 at_quote = True
         if at_quote:
             pp = p
             p += lq
             p = find_esc(fstr, quote, "\\", p)
             if p < 0:
                 if path:
                     warning("%s:%d: Unterminated string literal."
                             % (path, lno_to(fstr, pp)))
                 return None
             p += lq
             segs.append(fstr[pp:p])
             if showparse:
                 report("parse-cstr-quote-end %d" % p)
             continue
         at_end = False
         for end in ends:
             if fstr[p:p + len(end)] == end:
                 pp = p
                 p += len(end)
                 at_end = True
                 segs.append(_mask_chr)
                 outs.append(fstr[pp:p])
                 if showparse:
                     report("parse-cstr-end-end %d" % p)
                 break
         if at_end:
             break
         cmnt_end = False
         for ec in eolcmnts:
             if fstr[p:p + len(ec)] == ec:
                 pp = p
                 p += len(ec)
                 while p < l and fstr[p] != "\n":
                     p += 1
                 if p < l:
                     p += 1
                 cmnt_end = True
                 segs.append(_mask_chr)
                 outs.append(fstr[pp:p])
                 if showparse:
                     report("parse-cstr-eol-cmnt-end %d" % p)
                 break
         if cmnt_end:
             continue
         for dc1, dc2 in delimcmnts:
             if fstr[p:p + len(dc1)] == dc1:
                 pp = p
                 p += len(dc1)
                 while p < l and fstr[p:p + len(dc2)] != dc2:
                     p += 1
                 if p == l:
                     warning("%s:%d: Unterminated comment."
                             % (path, lno_to(fstr, pp)))
                     return None
                 p += len(dc2)
                 cmnt_end = True
                 segs.append(_mask_chr)
                 outs.append(fstr[pp:p])
                 if showparse:
                     report("parse-cstr-delim-cmnt-end %d" % p)
                 break
         if cmnt_end:
             continue
         break
     if quote is None:
         return None
 
     mstr = "".join(segs)
     return p, mstr, quote, outs
 
 
 _xml_options = Data()
 
 # Default tags and attributes to extract from.
 # Ordering of attributes is significant, first found is taken as context.
 # According to extractrc from kdesdk/scripts/.
 _xml_options.text_tags = set([
     "text", "title", "string", "whatsthis", "tooltip", "label",
 ])
 _xml_options.ctxt_attrs = [
     "context", "comment",
 ]
 
 _xml_rx = Data()
 _xml_rx.inited = False
 def _init_xml_regexes ():
     if _xml_rx.inited:
         return
     tagins = "|".join(sorted(_xml_options.text_tags))
     rx = re.compile(r"<\s*(%s)\b([^>]*)>([^<]*)<\s*/\s*\1\s*>" % tagins,
                     re.U | re.S | re.I)
     _xml_rx.i18n_el = rx
     attrins = "|".join(_xml_options.ctxt_attrs)
     rx = re.compile(r"""^(.*\b(?:%s)\s*=\s*['"])(.*?)(['"].*)$""" % attrins,
                     re.U | re.S | re.I)
     _xml_rx.ctxt_attr = rx
     _xml_rx.inited = True
 
 
 def resolve_xml (fstr, path):
 
     showparse = False
     if showparse:
         report("%s: >>>>> start >>>>>" % path)
 
     _init_xml_regexes()
     langdata = get_language_data("en_US")
     toxi18n = _xml_options.switch_to_xi18n
 
     segs = []
     p1 = 0
     while True:
         m = _xml_rx.i18n_el.search(fstr, p1)
         if not m:
             segs.append(fstr[p1:])
             break
         p2, p3 = m.span()
         lno = lno_to(fstr, p2)
         segs.append(fstr[p1:p2])
         tag, attr_str, etext = m.groups()
         ctxt = None
         m = _xml_rx.ctxt_attr.search(attr_str)
         if m:
             attr_head, ectxt, attr_tail = m.groups()
             ctxt, noesc_ctxt = unescape_xml(ectxt, testnoesc=True)
         text, noesc_text = unescape_xml(etext, testnoesc=True)
         if showparse:
             if ctxt is not None:
                 report("%s:%d: ctxt-text={%s}{%s}" % (path, lno, ectxt, etext))
             else:
                 report("%s:%d: text={%s}" % (path, lno, etext))
         ret = resolve_kuit(ctxt, text, None, langdata, path, lno,
                            toxi18n=toxi18n)
         res_ctxt, res_text = ret[:2]
         res_etext = escape_xml(res_text, noesc=noesc_text)
         if ctxt is not None:
             res_ectxt = escape_xml(res_ctxt, noesc=noesc_ctxt)
             seg = ("<%s%s%s%s>%s</%s>"
                    % (tag, attr_head, res_ectxt, attr_tail, res_etext, tag))
         else:
             seg = "<%s%s>%s</%s>" % (tag, attr_str, res_etext, tag)
         if showparse:
             if ctxt is not None:
                 report("%s:%d: res-ctxt-text={%s}{%s}"
                        % (path, lno, res_ectxt, res_etext))
             else:
                 report("%s:%d: res-text={%s}" % (path, lno, res_etext))
         segs.append(seg)
         p1 = p3
     res_fstr = "".join(segs)
 
     if showparse:
         report("%s: <<<<< end <<<<<" % path)
     return res_fstr
 
 
 _po_options = Data()
 _po_options.msgfmt_wrap = False
 
 def resolve_po (path):
 
     from pology.catalog import Catalog
     from pology.gtxtools import msgfilter
 
     cat = Catalog(path)
 
     langdata_src = get_language_data("en_US")
     lang = _kuit_spec.force_lang or cat.language()
     if not lang:
         raise StandardError(
             "%s: Cannot determine language of PO file." % path)
     langdata_trn = get_language_data(lang)
     toxi18n_global = _po_options.switch_to_xi18n
 
     seen_keys = set()
     for ind, msg in enumerate(cat):
         toxi18n = toxi18n_global
         # Override resolution setting by message xi18n flag.
         if "kde-kuit-format" in msg.flag:
             toxi18n = 2
         # Original fields.
         ctxt = msg.msgctxt
         forcerich = False
         if not _po_options.post_merge:
             ret = resolve_kuit(ctxt, msg.msgid, None,
                                langdata_src, path, msg.refline,
                                toxi18n=toxi18n)
             msg.msgid = ret[1]
             if ctxt is not None:
                 msg.msgctxt = ret[0]
             if msg.msgid_plural is not None:
                 ret = resolve_kuit(ctxt, msg.msgid_plural, None,
                                    langdata_src, path, msg.refline,
                                    toxi18n=toxi18n)
                 msg.msgid_plural = ret[1]
         else:
             # Check if to not touch existing KUIT or
             # to force rich text in non-original fields.
             if not forcerich:
                 ret = resolve_kuit(ctxt, msg.msgid, None,
                                    langdata_src, path, msg.refline,
                                    toxi18n=toxi18n)
                 has_any_html_tag, has_any_kuit_tag = ret[3:5]
                 if has_any_kuit_tag:
                     toxi18n = 2
                 else:
                     forcerich = has_any_html_tag
             if not forcerich:
                 ret = resolve_entities(msg.msgid, path, msg.refline)
                 any_entity_resolved = ret[1]
                 forcerich = any_entity_resolved
         # Previous original fields.
         ctxt_prev = msg.msgctxt_previous
         has_previous = False
         if msg.msgid_previous is not None:
             has_previous = True
             ret = resolve_kuit(ctxt_prev, msg.msgid_previous, None,
                                langdata_src, path, msg.refline,
                                toxi18n=toxi18n, forcerich=forcerich)
             msg.msgid_previous = ret[1]
             if ctxt_prev is not None:
                 msg.msgctxt_previous = ret[0]
             if msg.msgid_plural_previous is not None:
                 ret = resolve_kuit(ctxt_prev, msg.msgid_plural_previous, None,
                                    langdata_src, path, msg.refline,
                                    toxi18n=toxi18n, forcerich=forcerich)
                 msg.msgid_plural_previous = ret[1]
         # Translation fields.
         ctxt_trn = ctxt if (not msg.fuzzy or not has_previous) else ctxt_prev
         for i in range(len(msg.msgstr)):
             ret = resolve_kuit(ctxt_trn, msg.msgstr[i], None,
                                langdata_trn, path, msg.refline,
                                toxi18n=toxi18n, forcerich=forcerich)
             msg.msgstr[i] = ret[1]
             if msg.translated:
                 if msg.msgid.endswith("\n") and not msg.msgstr[i].endswith("\n"):
                     msg.msgstr[i] += "\n"
                 elif not msg.msgid.endswith("\n") and msg.msgstr[i].endswith("\n"):
                     msg.msgstr[i] = msg.msgstr[i][:-1]
         # In post-merge mode, maybe it can be unfuzzied now.
         if _po_options.post_merge and msg.fuzzy and all(list(msg.msgstr)):
             if (    msg.msgctxt == msg.msgctxt_previous
                 and msg.msgid == msg.msgid_previous
                 and msg.msgid_plural == msg.msgid_plural_previous
             ):
                 msg.unfuzzy()
         # Conversion may make a message with same key as a previous one,
         # remove the current message in that case.
         if msg.key in seen_keys:
             cat.remove_on_sync(ind)
         else:
             seen_keys.add(msg.key)
 
     modified = cat.sync()
     if modified and _po_options.msgfmt_wrap:
         msgfilter(["cat"])(cat.filename)
 
     return modified
 
 
 _map_restype_ext = {
     "ccall": (set([
         "cpp", "cxx", "cc", "c",
         "h", "hpp", "hxx", "hh",
         "py", "js", "rb", "qml",
         #"kcfg", won't work due to XML escaping; but there is
         # no existing case of embedded i18n() with KUIT in KDE repos.
     ]), resolve_ccall, True),
 
     "xml": (set([
         "ui", "rc", "kcfg",
     ]), resolve_xml, True),
 
     "po": (set([
         "po", "pot",
     ]), resolve_po, False),
 }
 # Inverted resolution types by extension.
 _map_ext_restype = {}
 def _init_map_ext_restype ():
     if _map_ext_restype:
         return
     for rt, (exts, rf, ons) in _map_restype_ext.items():
         for ext in exts:
             if ext not in _map_ext_restype:
                 _map_ext_restype[ext] = []
             _map_ext_restype[ext].append((rt, rf, ons))
 
 
 def get_resolvers_for_file (path):
 
     _init_map_ext_restype()
     p = path.rfind(".")
     if p >= 0:
         ext = path[p + 1:]
     else:
         ext = ""
     rspecs = _map_ext_restype.get(ext, [])
     return rspecs
 
 
 # KUIT keyboard shortcut delimiters and lookup key in PO files, as
 # format: (msgctxt, msgid).
 # According to kuitsemantics.cpp from kdecore.
 _kuit_raw_shortcut_delimiter_rx = re.compile(r"\+|-", re.U)
 _kuit_shortcut_delimiters = {
     "plain": (u"shortcut-key-delimiter/plain", u"+"),
     "rich": (u"shortcut-key-delimiter/rich", u"+"),
 }
 # Add delimiters for term format, same as plain.
 _kuit_shortcut_delimiters["term"] = _kuit_shortcut_delimiters["plain"]
 
 # KUIT keyboard key names and lookup in PO files,
 # as set((msgctxt, msgid)). F%1 is special.
 _kuit_key_names_raw = set([
     u"Alt", u"AltGr", u"Backspace", u"CapsLock", u"Control", u"Ctrl",
     u"Del", u"Delete", u"Down", u"End", u"Enter", u"Esc", u"Escape",
     u"Home", u"Hyper", u"Ins", u"Insert", u"Left", u"Menu", u"Meta",
     u"NumLock", u"PageDown", u"PageUp", u"PgDown", u"PgUp", u"PauseBreak",
     u"PrintScreen", u"PrtScr", u"Return", u"Right", u"ScrollLock", u"Shift",
     u"Space", u"Super", u"SysReq", u"Tab", u"Up", u"Win", u"F%1",
 ])
 _kuit_key_names = set((u"keyboard-key-name", kn) for kn in _kuit_key_names_raw)
 
 def textmod_shortcut (text, quote, fmt, langdata):
 
     segs = []
     p1 = 0
     while True:
         m = _kuit_raw_shortcut_delimiter_rx.search(text, p1)
         if not m:
             keyname = text[p1:].strip()
         else:
             p2, p3 = m.span()
             keyname = text[p1:p2].strip()
         if keyname[:1] == "F" and keyname[1:].isdigit():
             lkeypattern = langdata.keyname.get(u"F%1", u"F%1")
             lkeyname = lkeypattern.replace("%1", keyname[1:])
         else:
             lkeyname = langdata.keyname.get(keyname, keyname)
         segs.append(lkeyname)
         if not m:
             break
         segs.append(langdata.shcdelim[fmt])
         p1 = p3
     res_text = "".join(segs)
     if quote:
         res_text = escape_c(res_text, quote)
     return res_text
 
 
 # KUIT UI path delimiters and lookup key in PO files, as
 # format: (msgctxt, msgid).
 # According to kuitsemantics.cpp from kdecore.
 _kuit_raw_guipath_delimiter_rx = re.compile(r"->", re.U)
 _kuit_guipath_delimiters = {
     "plain": (u"gui-path-delimiter/plain", u"→"),
     "rich": (u"gui-path-delimiter/rich", u"→"),
 }
 # Add delimiters for term format, same as plain.
 _kuit_guipath_delimiters["term"] = _kuit_guipath_delimiters["plain"]
 
 def textmod_interface (text, quote, fmt, langdata):
 
     segs = []
     p1 = 0
     while True:
         m = _kuit_raw_guipath_delimiter_rx.search(text, p1)
         if not m:
             pathel = text[p1:].strip()
         else:
             p2, p3 = m.span()
             pathel = text[p1:p2].strip()
         if langdata.ifacewrap:
             head, sep = langdata.ifacewrap[:-1], langdata.ifacewrap[-1:]
             pathel = "%s%s%s" % (head, pathel, sep)
         segs.append(pathel)
         if not m:
             break
         segs.append(langdata.guidelim[fmt])
         p1 = p3
     res_text = "".join(segs)
     if quote:
         res_text = escape_c(res_text, quote)
     return res_text
 
 
 # KUIT transformation patterns and lookup key in PO files, as
 # (tag, attributes, format): (msgctxt, msgid, subsmap, prepend, postpend, textmodf).
 # According to kuitsemantics.cpp from kdecore.
 _kuit_transforms = {
     (u"title", frozenset([]), "plain"):
         (u"@title/plain",
          u"== %1 ==",
          {"%1": "title"},
          "", "\n",
          None),
     (u"title", frozenset([]), "rich"):
         (u"@title/rich",
          u"<h2>%1</h2>",
          {"%1": "title"},
          "", "",
          None),
     (u"subtitle", frozenset([]), "plain"):
         (u"@subtitle/plain",
          u"~ %1 ~",
          {"%1": "subtitle"},
          "", "\n",
          None),
     (u"subtitle", frozenset([]), "rich"):
         (u"@subtitle/rich",
          u"<h3>%1</h3>",
          {"%1": "subtitle"},
          "", "",
          None),
     (u"para", frozenset([]), "plain"):
         (u"@para/plain",
          u"%1",
          {"%1": "para"},
          "", "\n",
          None),
     (u"para", frozenset([]), "rich"):
         (u"@para/rich",
          u"<p>%1</p>",
          {"%1": "para"},
          "", "",
          None),
     (u"list", frozenset([]), "plain"):
         (u"@list/plain",
          u"%1",
          {"%1": "list"},
          "\n", "",
          None),
     (u"list", frozenset([]), "rich"):
         (u"@list/rich",
          u"<ul>%1</ul>",
          {"%1": "list"},
          "", "",
          None),
     (u"item", frozenset([]), "plain"):
         (u"@item/plain",
          u"  * %1",
          {"%1": "item"},
          "", "\n",
          None),
     (u"item", frozenset([]), "rich"):
         (u"@item/rich",
          u"<li>%1</li>",
          {"%1": "item"},
          "", "",
          None),
     (u"note", frozenset([]), "plain"):
         (u"@note/plain",
          u"Note: %1",
          {"%1": "note"},
          "", "",
          None),
     (u"note", frozenset([]), "rich"):
         (u"@note/rich",
          u"<i>Note</i>: %1",
          {"%1": "note"},
          "", "",
          None),
     (u"note", frozenset([u"label"]), "plain"):
         (u"@note-with-label/plain\n"
          u"%1 is the note label, %2 is the text",
          u"%1: %2",
          {"%1": "label", "%2": "note"},
          "", "",
          None),
     (u"note", frozenset([u"label"]), "rich"):
         (u"@note-with-label/rich\n"
          u"%1 is the note label, %2 is the text",
          u"<i>%1</i>: %2",
          {"%1": "label", "%2": "note"},
          "", "",
          None),
     (u"warning", frozenset([]), "plain"):
         (u"@warning/plain",
          u"WARNING: %1",
          {"%1": "warning"},
          "", "",
          None),
     (u"warning", frozenset([]), "rich"):
         (u"@warning/rich",
          u"<b>Warning</b>: %1",
          {"%1": "warning"},
          "", "",
          None),
     (u"warning", frozenset([u"label"]), "plain"):
         (u"@warning-with-label/plain\n"
          u"%1 is the warning label, %2 is the text",
          u"%1: %2",
          {"%1": "label", "%2": "warning"},
          "", "",
          None),
     (u"warning", frozenset([u"label"]), "rich"):
         (u"@warning-with-label/rich\n"
          u"%1 is the warning label, %2 is the text",
          u"<b>%1</b>: %2",
          {"%1": "label", "%2": "warning"},
          "", "",
          None),
     (u"link", frozenset([]), "plain"):
         (u"@link/plain",
          u"%1",
          {"%1": "link"},
          "", "",
          None),
     (u"link", frozenset([]), "rich"):
         (u"@link/rich",
          u"<a href=\"%1\">%1</a>",
          {"%1": "link"},
          "", "",
          None),
     (u"link", frozenset([u"url"]), "plain"):
         (u"@link-with-description/plain\n"
          u"%1 is the URL, %2 is the descriptive text",
          u"%2 (%1)",
          {"%2": "link", "%1": "url"},
          "", "",
          None),
     (u"link", frozenset([u"url"]), "rich"):
         (u"@link-with-description/rich\n"
          u"%1 is the URL, %2 is the descriptive text",
          u"<a href=\"%1\">%2</a>",
          {"%2": "link", "%1": "url"},
          "", "",
          None),
     (u"filename", frozenset([]), "plain"):
         (u"@filename/plain",
          u"‘%1’",
          {"%1": "filename"},
          "", "",
          None),
     (u"filename", frozenset([]), "rich"):
         (u"@filename/rich",
          u"<tt>%1</tt>",
          {"%1": "filename"},
          "", "",
          None),
     (u"application", frozenset([]), "plain"):
         (u"@application/plain",
          u"%1",
          {"%1": "application"},
          "", "",
          None),
     (u"application", frozenset([]), "rich"):
         (u"@application/rich",
          u"%1",
          {"%1": "application"},
          "", "",
          None),
     (u"command", frozenset([]), "plain"):
         (u"@command/plain",
          u"%1",
          {"%1": "command"},
          "", "",
          None),
     (u"command", frozenset([]), "rich"):
         (u"@command/rich",
          u"<tt>%1</tt>",
          {"%1": "command"},
          "", "",
          None),
     (u"command", frozenset([u"section"]), "plain"):
         (u"@command-with-section/plain\n"
          u"%1 is the command name, %2 is its man section",
          u"%1(%2)",
          {"%1": "command", "%2": "section"},
          "", "",
          None),
     (u"command", frozenset([u"section"]), "rich"):
         (u"@command-with-section/rich\n"
          u"%1 is the command name, %2 is its man section",
          u"<tt>%1(%2)</tt>",
          {"%1": "command", "%2": "section"},
          "", "",
          None),
     (u"resource", frozenset([]), "plain"):
         (u"@resource/plain",
          u"“%1”",
          {"%1": "resource"},
          "", "",
          None),
     (u"resource", frozenset([]), "rich"):
         (u"@resource/rich",
          u"“%1”",
          {"%1": "resource"},
          "", "",
          None),
     (u"icode", frozenset([]), "plain"):
         (u"@icode/plain",
          u"“%1”",
          {"%1": "icode"},
          "", "",
          None),
     (u"icode", frozenset([]), "rich"):
         (u"@icode/rich",
          u"<tt>%1</tt>",
          {"%1": "icode"},
          "", "",
          None),
     (u"bcode", frozenset([]), "plain"):
         (u"@bcode/plain",
          u"\n%1\n",
          {"%1": "bcode"},
          "", "",
          None),
     (u"bcode", frozenset([]), "rich"):
         (u"@bcode/rich",
          u"<pre>%1</pre>",
          {"%1": "bcode"},
          "", "",
          None),
     (u"shortcut", frozenset([]), "plain"):
         (u"@shortcut/plain",
          u"%1",
          {"%1": "shortcut"},
          "", "",
          textmod_shortcut),
     (u"shortcut", frozenset([]), "rich"):
         (u"@shortcut/rich",
          u"<b>%1</b>",
          {"%1": "shortcut"},
          "", "",
          textmod_shortcut),
     (u"interface", frozenset([]), "plain"):
         (u"@interface/plain",
          u"|%1|",
          {"%1": "interface"},
          "", "",
          textmod_interface),
     (u"interface", frozenset([]), "rich"):
         (u"@interface/rich",
          u"<i>%1</i>",
          {"%1": "interface"},
          "", "",
          textmod_interface),
     (u"emphasis", frozenset([]), "plain"):
         (u"@emphasis/plain",
          u"*%1*",
          {"%1": "emphasis"},
          "", "",
          None),
     (u"emphasis", frozenset([]), "rich"):
         (u"@emphasis/rich",
          u"<i>%1</i>",
          {"%1": "emphasis"},
          "", "",
          None),
     (u"emphasis", frozenset([u"strong"]), "plain"):
         (u"@emphasis-strong/plain",
          u"**%1**",
          {"%1": "emphasis"},
          "", "",
          None),
     (u"emphasis", frozenset([u"strong"]), "rich"):
         (u"@emphasis-strong/rich",
          u"<b>%1</b>",
          {"%1": "emphasis"},
          "", "",
          None),
     (u"placeholder", frozenset([]), "plain"):
         (u"@placeholder/plain",
          u"&lt;%1&gt;",
          {"%1": "placeholder"},
          "", "",
          None),
     (u"placeholder", frozenset([]), "rich"):
         (u"@placeholder/rich",
          u"&lt;<i>%1</i>&gt;",
          {"%1": "placeholder"},
          "", "",
          None),
     (u"email", frozenset([]), "plain"):
         (u"@email/plain",
          u"&lt;%1&gt;",
          {"%1": "email"},
          "", "",
          None),
     (u"email", frozenset([]), "rich"):
         (u"@email/rich",
          u"&lt;<a href=\"mailto:%1\">%1</a>&gt;",
          {"%1": "email"},
          "", "",
          None),
     (u"email", frozenset([u"address"]), "plain"):
         (u"@email-with-name/plain\n"
          u"%1 is name, %2 is address",
          u"%1 &lt;%2&gt;",
          {"%1": "email", "%2": "address"},
          "", "",
          None),
     (u"email", frozenset([u"address"]), "rich"):
         (u"@email-with-name/rich\n"
          u"%1 is name, %2 is address",
          u"<a href=\"mailto:%2\">%1</a>",
          {"%1": "email", "%2": "address"},
          "", "",
          None),
     (u"envar", frozenset([]), "plain"):
         (u"@envar/plain",
          u"$%1",
          {"%1": "envar"},
          "", "",
          None),
     (u"envar", frozenset([]), "rich"):
         (u"@envar/rich",
          u"<tt>$%1</tt>",
          {"%1": "envar"},
          "", "",
          None),
     (u"message", frozenset([]), "plain"):
         (u"@message/plain",
          u"/%1/",
          {"%1": "message"},
          "", "",
          None),
     (u"message", frozenset([]), "rich"):
         (u"@message/rich",
          u"<i>%1</i>",
          {"%1": "message"},
          "", "",
          None),
     (u"nl", frozenset([]), "plain"):
         (u"@nl/plain",
          u"%1\n",
          {"%1": "nl"},
          "", "",
          None),
     (u"nl", frozenset([]), "rich"):
         (u"@nl/rich",
          u"%1<br/>",
          {"%1": "nl"},
          "", "",
          None),
 }
 
 # Add patterns for term format, same as plain.
 for (tag, attrs, fmt), trspec in _kuit_transforms.items():
     if fmt == "plain":
         _kuit_transforms[(tag, attrs, "term")] = trspec
 
 # Collect all known tags and formats.
 _kuit_tags = set()
 _known_formats = set()
 for (tag, attrs, fmt), trspec in _kuit_transforms.items():
     _kuit_tags.add(tag)
     _known_formats.add(fmt)
 
 # Qt rich text tags (used for implicit determination of rich format).
 _html_tags = set([
     "a", "address", "b", "big", "blockquote", "body", "br",
     "center", "cita", "code", "dd", "dfn", "div", "dl", "dt", "em",
     "font", "h1", "h2", "h3", "h4", "h5", "h6", "head", "hr", "html",
     "i", "img", "kbd", "meta", "li", "nobr", "ol", "p", "pre",
     "qt", "s", "samp", "small", "span", "strong", "sup", "sub",
     "table", "tbody", "td", "tfoot", "th", "thead", "title", "tr", "tt",
     "u", "ul", "var",
 ])
 
 # Default target formats by context marker.
 # According to kuitsemantics.cpp from kdecore.
 _cmarker_to_format = {
     "@action": "plain",
     "@title": "plain",
     "@label": "plain",
     "@option": "plain",
     "@item": "plain",
     "@info": "rich",
     "@info:progress": "plain",
     "@info:status": "plain",
     "@info:credit": "plain",
     "@info:shell": "plain",
 }
 
 _top_tag_rx = re.compile(r"<\s*(qt|html)\b[^>]*>(.*)<\s*/\s*qt\s*>",
                          re.U | re.S | re.I)
 
 def resolve_kuit (ctxt, text, quote, langdata, path, lno,
                   toxi18n=0, forcerich=False):
 
     xi18n = False
 
     fmt_cm, fmt_rc, res_ctxt, has_cmarker = format_from_cmarker(ctxt, quote)
     if forcerich:
         fmt_cm = "rich"
         fmt_rc = "rich"
     if fmt_cm and fmt_cm not in _known_formats:
         warning("%s:%d: Unknown format modifier '%s' in context marker. "
                 "The string will not be resolved until this is fixed."
                 % (path, lno, fmt_cm))
         has_any_html_tag = False
         has_any_kuit_tag = False
         return ctxt, text, xi18n, has_any_html_tag, has_any_kuit_tag
     if toxi18n in (1, 2) and fmt_cm != fmt_rc and not path.endswith(".po"):
         warning("%s:%d: Manual format modifier '%s' does not match "
                 "the implicit format modifier '%s' based on context marker. "
                 "Manual format modifiers are no longer supported, "
                 "replace them with another format selection method."
                 % (path, lno, fmt_cm, fmt_rc))
         # Recover original context with modifier still inside.
         res_ctxt = ctxt
     fmt = fmt_cm or format_from_tags(text, quote) or "plain"
 
     ret = _resolve_kuit_r(text, quote, fmt, langdata, path, lno)
     res_text, has_any_kuit_tag, has_any_html_tag, has_top_tag = ret
 
     if (toxi18n == 1 and has_any_kuit_tag) or toxi18n == 2:
         if has_any_html_tag:
             warning("%s:%d: Mixed KUIT and HTML tags. "
                     "This should be changed to all-KUIT tags."
                     % (path, lno))
         xi18n = True
         return res_ctxt, text, xi18n, has_any_html_tag, has_any_kuit_tag
 
     if fmt_cm != "rich" and not has_any_html_tag:
         ret = resolve_entities(res_text, path, lno)
         res_text, any_entity_resolved = ret
     else:
         any_entity_resolved = False
 
     if not has_cmarker and not has_any_kuit_tag and not any_entity_resolved:
         # In this case the resolution should have been no-op,
         # so return the original input just in case.
         return ctxt, text, xi18n, has_any_html_tag, has_any_kuit_tag
 
     if has_top_tag or fmt_cm == "rich":
         # What to do with top tag in rich text.
         # 0 - As in KUIT processing in kdecore. But this would cause
         #     <html> tags to appear in otherwise plain text which happens
         #     to be sent to rich-text capable output. People may not like it.
         #     (It would also cause that running resolution over already
         #     resolved files leads to spurious additon of <html> tags,
         #     e.g. 1st resolution @info/plain -> @info and no <html> tag,
         #     2nd resolution @info -> @info and <html> tag.)
         # 1 - Original top tag is removed and then <html> tag added only if
         #     there is another tag or entity in the text.
         # 2 - Top tag is neither added nor removed, but left as it is
         #     in the literal text.
         top_tag_res = 2
         if top_tag_res in (0, 1):
             if has_top_tag:
                 res_text = _top_tag_rx.sub(r"\2", res_text)
             if top_tag_res == 0 or ("<" in res_text or "&" in res_text):
                 p1 = 0
                 p2 = len(res_text)
                 if quote:
                     p1 = res_text.find(quote) + len(quote)
                     p2 = res_text.rfind(quote)
                 res_text = ("%s<html>%s</html>%s"
                             % (res_text[:p1], res_text[p1:p2], res_text[p2:]))
         elif top_tag_res == 2:
             pass
         else:
             raise StandardError(
                 "Unknown top tag resolution choice '%d'." % top_tag_res)
 
     return res_ctxt, res_text, xi18n, has_any_html_tag, has_any_kuit_tag
 
 
 _element_rx = re.compile(r"<\s*(\w+)(?:([^>]*)>(.*?)<\s*/\s*\1|\s*/)\s*>",
                          re.U | re.S)
 _attribute_rx = re.compile(r"""\b(\w+)\s*=\s*["'](.*?)["']""")
 
 def _resolve_kuit_r (text, quote, fmt, langdata, path, lno):
 
     segs = []
     p1 = 0
     has_any_kuit_tag = False
     has_any_html_tag = False
     has_top_tag = False
     while True:
         m = _element_rx.search(text, p1)
         if not m:
             segs.append(text[p1:])
             break
         p2, p3 = m.span()
         segs.append(text[p1:p2])
         tag, attrstr, etext = m.groups()
         if etext is None:
             in_place = True
             attrstr, etext = "", ""
         else:
             in_place = False
         ret = _resolve_kuit_r(etext, quote, fmt, langdata, path, lno)
         res_etext, has_any_kuit_tag_1, has_any_html_tag_1, has_top_tag_1 = ret
         has_any_html_tag = has_any_html_tag or has_any_html_tag_1
         has_any_kuit_tag = has_any_kuit_tag or has_any_kuit_tag_1
         res_span = text[p2:p3] # in case no other resolution
         if tag in _kuit_tags:
             has_any_kuit_tag = True
             attrmap = dict(_attribute_rx.findall(attrstr))
             has_top_tag = has_top_tag or has_top_tag_1
             trkey = (tag, frozenset(attrmap.keys()), fmt)
             tr = langdata.transform.get(trkey)
             if tr is not None:
                 if tr.textmodf:
                     res_etext = tr.textmodf(res_etext, quote, fmt, langdata)
                 res_span = tr.pattern
                 if quote:
                     res_span = escape_c(res_span, quote)
                 replmap = attrmap
                 replmap[tag] = res_etext
                 # Replace in one pass, because replacement might contain %N.
                 p1a = 0
                 csegs = []
                 seen_pls = set()
                 while True:
                     p2a = res_span.find("%", p1a)
                     if p2a < 0:
                         csegs.append(res_span[p1a:])
                         break
                     csegs.append(res_span[p1a:p2a])
                     if res_span[p2a + 1:p2a + 2].isdigit():
                         pl = res_span[p2a:p2a + 2]
                         nm = tr.subsmap[pl]
                         cseg = replmap[nm] # cannot fail
                         if quote and pl in seen_pls:
                             # If placeholder was already replaced once,
                             # further replacements have to eliminate
                             # masking chars and quotes, because
                             # total number of masking chars must not change.
                             cseg = join_quoted(cseg, quote,
                                                invert=True, strip=True)
                         seen_pls.add(pl)
                         csegs.append(cseg)
                         p1a = p2a + 2
                     else:
                         csegs.append("%")
                         p1a = p2a + 1
                 res_span = "".join(csegs)
                 res_span = tr.prepend + res_span + tr.postpend
             else:
                 warning("%s:%d: No transformation for tag '%s' and format '%s'."
                         % (path, lno, tag, fmt))
         elif tag == "numid":
             has_any_kuit_tag = True
             # What to do with numid tag.
             # 0 - Simply remove numid tag, with a warning to manually convert
             #     associated argument into digit string.
             # 1 - Modify all placeholders in the text wrapped with numid
             #     to %I<N> form, which indicates numeric identifier formatting.
             numid_tag_res = 0
             if numid_tag_res == 0:
                 if not path.endswith((".po", ".pot")):
                     warning("%s:%d: A '%s' tag has been removed, do something "
                             "manually with the affected argument "
                             "(e.g. wrap it in QString::number())."
                             % (path, lno, tag))
                 res_span = res_etext
             elif numid_tag_res == 1:
                 nisegs = []
                 p1b = 0
                 while True:
                     p2b = res_etext.find("%", p1b)
                     if p2b < 0:
                         nisegs.append(res_etext[p1b:])
                         break
                     nisegs.append(res_etext[p1b:p2b])
                     if res_etext[p2b + 1:p2b + 2].isdigit():
                         p3b = p2b + 1
                         while p3b < len(res_etext) and res_etext[p3b].isdigit():
                             p3b += 1
                         nisegs.append("%I" + res_etext[p2b + 1:p3b])
                         p1b = p3b
                     else:
                         nisegs.append("%")
                         p1b += 1
                 res_span = "".join(nisegs)
             else:
                 raise StandardError(
                     "Unknown '%s' tag resolution choice '%d'."
                     % ("numid", numid_tag_res))
         elif tag in _html_tags:
             has_any_html_tag = True
             if tag.lower() in ("qt", "html"):
                 has_top_tag = True
             if not in_place:
                 res_span = "<%s%s>%s</%s>" % (tag, attrstr, res_etext, tag)
         segs.append(res_span)
         p1 = p3
     res_text = "".join(segs)
     return res_text, has_any_kuit_tag, has_any_html_tag, has_top_tag
 
 
 _entity_rx = re.compile(r"&([a-z]+|#[0-9]+|#x[0-9a-fA-F]+);", re.U | re.S)
 
 _xml_entities = {
     "lt": "<",
     "gt": ">",
     "amp": "&",
     "apos": "'",
     "quot": "\"",
 }
 
 def resolve_entities (text, path, lno):
 
     any_entity_resolved = False
     segs = []
     p1 = 0
     while True:
         m = _entity_rx.search(text, p1)
         if not m:
             segs.append(text[p1:])
             break
         p2, p3 = m.span()
         segs.append(text[p1:p2])
         span = text[p2:p3]
         ent = m.group(1)
         if ent.startswith("#"): # numeric character
             try:
                 if ent[1] == "x":
                     c = unichr(int(ent[2:], 16))
                 else:
                     c = unichr(int(ent[1:], 10))
             except:
                 warning("%s:%d: Invalid numeric XML entity '%s'."
                         % (path, lno, ent))
             segs.append(c)
             any_entity_resolved = True
         elif ent in _xml_entities:
             segs.append(_xml_entities[ent])
             any_entity_resolved = True
         else:
             # Don't warn, may be some HTML entity.
             segs.append(span)
         p1 = p3
     res_text = "".join(segs)
     return res_text, any_entity_resolved
 
 
 _cmarker_rx = re.compile(r"@(\w+):?(\w+)?/?(\w+)?", re.U | re.S)
 
 def format_from_cmarker (ctxt, quote):
 
     fmt = None
     fmt_rc = None
     res_ctxt = ctxt
     has_cmarker = False
     if ctxt is not None:
         p1 = 0
         if quote:
             p1 = ctxt.find(quote) + len(quote)
         m = _cmarker_rx.match(ctxt, p1)
         if m:
             has_cmarker = True
             role, cue, fmt = m.groups()
             if role and cue: # implicit format by role and cue
                 fmt_rc = _cmarker_to_format.get("@%s:%s" % (role, cue))
             if not fmt_rc: # implicit format by role alone
                 fmt_rc = _cmarker_to_format.get("@%s" % role)
             if fmt: # explicit format modifier
                 p2 = ctxt.find("/", p1)
                 res_ctxt = ctxt[:p2] + ctxt[p2 + 1 + len(fmt):]
             else:
                 fmt = fmt_rc
     return fmt, fmt_rc, res_ctxt, has_cmarker
 
 
 _opentag_rx = re.compile(r"<\s*(\w+)[^>]*>", re.U | re.S)
 
 def format_from_tags (text, quote):
 
     fmt = None
     for tag in _opentag_rx.findall(text):
         if tag in _html_tags:
             fmt = "rich"
             break
     return fmt
 
 
 def escape_c (text, quote):
 
     text = text.replace("\\", "\\\\") # must be first
     if quote:
         text = text.replace(quote, "\\" + quote)
     text = text.replace("\t", "\\t")
     text = text.replace("\n", "\\n")
     return text
 
 
 def join_quoted (s, quote, invert=False, strip=False):
 
     segs1 = []
     segs2 = []
     p1 = 0
     l = len(s)
     lq = len(quote)
     while True:
         p2 = find_esc(s, quote, "\\", p1)
         if p2 < 0:
             segs2.append(s[p1:])
             break
         segs2.append(s[p1:p2])
         p2 += len(quote)
         p3 = find_skip_esc(s, quote, "\\", p2)
         if p3 < 0:
             raise StandardError(
                 "Malformed concatenated string literal '%s'." % s)
         segs1.append(s[p2:p3])
         p1 = p3 + len(quote)
     js1 = "".join(segs1)
     js2 = "".join(segs2)
     js = js1 if not invert else js2
     if not strip:
         js = quote + js + quote
     return js
 
 
 def find_esc (s, f, e, p=0):
 
     ls = len(s)
     le = len(e)
     while p < ls:
         if s.startswith(e, p):
             p += le + 1
         elif s.startswith(f, p):
             break
         else:
             p += 1
     if p >= ls:
         p = -1
     return p
 
 
 _xml_entities_escape_ordered = [
     ("&", "&amp;"), # must be first
     ("<", "&lt;"),
     (">", "&gt;"),
     ("\"", "&quot;"),
     ("'", "&apos;"),
 ]
 _xml_entities_unescape_ordered = [
     tuple(reversed(x)) for x in reversed(_xml_entities_escape_ordered)]
 
 def unescape_xml (es, testnoesc=False):
 
     s = es
     if testnoesc:
         noesc = set()
     for ent, val in _xml_entities_unescape_ordered:
         if testnoesc:
             p = s.find(val)
             if p >= 0 and not s.startswith(ent, p): # for & -> &amp;
                 noesc.add(ent)
         s = s.replace(ent, val)
     if testnoesc:
         return s, noesc
     else:
         return s
 
 def escape_xml (s, noesc=None):
 
     es = s
     for val, ent in _xml_entities_escape_ordered:
         if not noesc or ent not in noesc:
             es = es.replace(val, ent)
     return es
 
 
 if __name__ == "__main__":
     main()