lib/encoding.tcl

   1 # git-gui encoding support
   2 # Copyright (C) 2005 Paul Mackerras <paulus@samba.org>
   3 # (Copied from gitk, commit fd8ccbec4f0161)
   4
   5 # This list of encoding names and aliases is distilled from
   6 # http://www.iana.org/assignments/character-sets.
   7 # Not all of them are supported by Tcl.
   8 set encoding_aliases {
   9     { ANSI_X3.4-1968 iso-ir-6 ANSI_X3.4-1986 ISO_646.irv:1991 ASCII
  10       ISO646-US US-ASCII us IBM367 cp367 csASCII }
  11     { ISO-10646-UTF-1 csISO10646UTF1 }
  12     { ISO_646.basic:1983 ref csISO646basic1983 }
  13     { INVARIANT csINVARIANT }
  14     { ISO_646.irv:1983 iso-ir-2 irv csISO2IntlRefVersion }
  15     { BS_4730 iso-ir-4 ISO646-GB gb uk csISO4UnitedKingdom }
  16     { NATS-SEFI iso-ir-8-1 csNATSSEFI }
  17     { NATS-SEFI-ADD iso-ir-8-2 csNATSSEFIADD }
  18     { NATS-DANO iso-ir-9-1 csNATSDANO }
  19     { NATS-DANO-ADD iso-ir-9-2 csNATSDANOADD }
  20     { SEN_850200_B iso-ir-10 FI ISO646-FI ISO646-SE se csISO10Swedish }
  21     { SEN_850200_C iso-ir-11 ISO646-SE2 se2 csISO11SwedishForNames }
  22     { KS_C_5601-1987 iso-ir-149 KS_C_5601-1989 KSC_5601 korean csKSC56011987 }
  23     { ISO-2022-KR csISO2022KR }
  24     { EUC-KR csEUCKR }
  25     { ISO-2022-JP csISO2022JP }
  26     { ISO-2022-JP-2 csISO2022JP2 }
  27     { JIS_C6220-1969-jp JIS_C6220-1969 iso-ir-13 katakana x0201-7
  28       csISO13JISC6220jp }
  29     { JIS_C6220-1969-ro iso-ir-14 jp ISO646-JP csISO14JISC6220ro }
  30     { IT iso-ir-15 ISO646-IT csISO15Italian }
  31     { PT iso-ir-16 ISO646-PT csISO16Portuguese }
  32     { ES iso-ir-17 ISO646-ES csISO17Spanish }
  33     { greek7-old iso-ir-18 csISO18Greek7Old }
  34     { latin-greek iso-ir-19 csISO19LatinGreek }
  35     { DIN_66003 iso-ir-21 de ISO646-DE csISO21German }
  36     { NF_Z_62-010_(1973) iso-ir-25 ISO646-FR1 csISO25French }
  37     { Latin-greek-1 iso-ir-27 csISO27LatinGreek1 }
  38     { ISO_5427 iso-ir-37 csISO5427Cyrillic }
  39     { JIS_C6226-1978 iso-ir-42 csISO42JISC62261978 }
  40     { BS_viewdata iso-ir-47 csISO47BSViewdata }
  41     { INIS iso-ir-49 csISO49INIS }
  42     { INIS-8 iso-ir-50 csISO50INIS8 }
  43     { INIS-cyrillic iso-ir-51 csISO51INISCyrillic }
  44     { ISO_5427:1981 iso-ir-54 ISO5427Cyrillic1981 }
  45     { ISO_5428:1980 iso-ir-55 csISO5428Greek }
  46     { GB_1988-80 iso-ir-57 cn ISO646-CN csISO57GB1988 }
  47     { GB_2312-80 iso-ir-58 chinese csISO58GB231280 }
  48     { NS_4551-1 iso-ir-60 ISO646-NO no csISO60DanishNorwegian
  49       csISO60Norwegian1 }
  50     { NS_4551-2 ISO646-NO2 iso-ir-61 no2 csISO61Norwegian2 }
  51     { NF_Z_62-010 iso-ir-69 ISO646-FR fr csISO69French }
  52     { videotex-suppl iso-ir-70 csISO70VideotexSupp1 }
  53     { PT2 iso-ir-84 ISO646-PT2 csISO84Portuguese2 }
  54     { ES2 iso-ir-85 ISO646-ES2 csISO85Spanish2 }
  55     { MSZ_7795.3 iso-ir-86 ISO646-HU hu csISO86Hungarian }
  56     { JIS_C6226-1983 iso-ir-87 x0208 JIS_X0208-1983 csISO87JISX0208 }
  57     { greek7 iso-ir-88 csISO88Greek7 }
  58     { ASMO_449 ISO_9036 arabic7 iso-ir-89 csISO89ASMO449 }
  59     { iso-ir-90 csISO90 }
  60     { JIS_C6229-1984-a iso-ir-91 jp-ocr-a csISO91JISC62291984a }
  61     { JIS_C6229-1984-b iso-ir-92 ISO646-JP-OCR-B jp-ocr-b
  62       csISO92JISC62991984b }
  63     { JIS_C6229-1984-b-add iso-ir-93 jp-ocr-b-add csISO93JIS62291984badd }
  64     { JIS_C6229-1984-hand iso-ir-94 jp-ocr-hand csISO94JIS62291984hand }
  65     { JIS_C6229-1984-hand-add iso-ir-95 jp-ocr-hand-add
  66       csISO95JIS62291984handadd }
  67     { JIS_C6229-1984-kana iso-ir-96 csISO96JISC62291984kana }
  68     { ISO_2033-1983 iso-ir-98 e13b csISO2033 }
  69     { ANSI_X3.110-1983 iso-ir-99 CSA_T500-1983 NAPLPS csISO99NAPLPS }
  70     { ISO_8859-1:1987 iso-ir-100 ISO_8859-1 ISO-8859-1 latin1 l1 IBM819
  71       CP819 csISOLatin1 }
  72     { ISO_8859-2:1987 iso-ir-101 ISO_8859-2 ISO-8859-2 latin2 l2 csISOLatin2 }
  73     { T.61-7bit iso-ir-102 csISO102T617bit }
  74     { T.61-8bit T.61 iso-ir-103 csISO103T618bit }
  75     { ISO_8859-3:1988 iso-ir-109 ISO_8859-3 ISO-8859-3 latin3 l3 csISOLatin3 }
  76     { ISO_8859-4:1988 iso-ir-110 ISO_8859-4 ISO-8859-4 latin4 l4 csISOLatin4 }
  77     { ECMA-cyrillic iso-ir-111 KOI8-E csISO111ECMACyrillic }
  78     { CSA_Z243.4-1985-1 iso-ir-121 ISO646-CA csa7-1 ca csISO121Canadian1 }
  79     { CSA_Z243.4-1985-2 iso-ir-122 ISO646-CA2 csa7-2 csISO122Canadian2 }
  80     { CSA_Z243.4-1985-gr iso-ir-123 csISO123CSAZ24341985gr }
  81     { ISO_8859-6:1987 iso-ir-127 ISO_8859-6 ISO-8859-6 ECMA-114 ASMO-708
  82       arabic csISOLatinArabic }
  83     { ISO_8859-6-E csISO88596E ISO-8859-6-E }
  84     { ISO_8859-6-I csISO88596I ISO-8859-6-I }
  85     { ISO_8859-7:1987 iso-ir-126 ISO_8859-7 ISO-8859-7 ELOT_928 ECMA-118
  86       greek greek8 csISOLatinGreek }
  87     { T.101-G2 iso-ir-128 csISO128T101G2 }
  88     { ISO_8859-8:1988 iso-ir-138 ISO_8859-8 ISO-8859-8 hebrew
  89       csISOLatinHebrew }
  90     { ISO_8859-8-E csISO88598E ISO-8859-8-E }
  91     { ISO_8859-8-I csISO88598I ISO-8859-8-I }
  92     { CSN_369103 iso-ir-139 csISO139CSN369103 }
  93     { JUS_I.B1.002 iso-ir-141 ISO646-YU js yu csISO141JUSIB1002 }
  94     { ISO_6937-2-add iso-ir-142 csISOTextComm }
  95     { IEC_P27-1 iso-ir-143 csISO143IECP271 }
  96     { ISO_8859-5:1988 iso-ir-144 ISO_8859-5 ISO-8859-5 cyrillic
  97       csISOLatinCyrillic }
  98     { JUS_I.B1.003-serb iso-ir-146 serbian csISO146Serbian }
  99     { JUS_I.B1.003-mac macedonian iso-ir-147 csISO147Macedonian }
 100     { ISO_8859-9:1989 iso-ir-148 ISO_8859-9 ISO-8859-9 latin5 l5 csISOLatin5 }
 101     { greek-ccitt iso-ir-150 csISO150 csISO150GreekCCITT }
 102     { NC_NC00-10:81 cuba iso-ir-151 ISO646-CU csISO151Cuba }
 103     { ISO_6937-2-25 iso-ir-152 csISO6937Add }
 104     { GOST_19768-74 ST_SEV_358-88 iso-ir-153 csISO153GOST1976874 }
 105     { ISO_8859-supp iso-ir-154 latin1-2-5 csISO8859Supp }
 106     { ISO_10367-box iso-ir-155 csISO10367Box }
 107     { ISO-8859-10 iso-ir-157 l6 ISO_8859-10:1992 csISOLatin6 latin6 }
 108     { latin-lap lap iso-ir-158 csISO158Lap }
 109     { JIS_X0212-1990 x0212 iso-ir-159 csISO159JISX02121990 }
 110     { DS_2089 DS2089 ISO646-DK dk csISO646Danish }
 111     { us-dk csUSDK }
 112     { dk-us csDKUS }
 113     { JIS_X0201 X0201 csHalfWidthKatakana }
 114     { KSC5636 ISO646-KR csKSC5636 }
 115     { ISO-10646-UCS-2 csUnicode }
 116     { ISO-10646-UCS-4 csUCS4 }
 117     { DEC-MCS dec csDECMCS }
 118     { hp-roman8 roman8 r8 csHPRoman8 }
 119     { macintosh mac csMacintosh }
 120     { IBM037 cp037 ebcdic-cp-us ebcdic-cp-ca ebcdic-cp-wt ebcdic-cp-nl
 121       csIBM037 }
 122     { IBM038 EBCDIC-INT cp038 csIBM038 }
 123     { IBM273 CP273 csIBM273 }
 124     { IBM274 EBCDIC-BE CP274 csIBM274 }
 125     { IBM275 EBCDIC-BR cp275 csIBM275 }
 126     { IBM277 EBCDIC-CP-DK EBCDIC-CP-NO csIBM277 }
 127     { IBM278 CP278 ebcdic-cp-fi ebcdic-cp-se csIBM278 }
 128     { IBM280 CP280 ebcdic-cp-it csIBM280 }
 129     { IBM281 EBCDIC-JP-E cp281 csIBM281 }
 130     { IBM284 CP284 ebcdic-cp-es csIBM284 }
 131     { IBM285 CP285 ebcdic-cp-gb csIBM285 }
 132     { IBM290 cp290 EBCDIC-JP-kana csIBM290 }
 133     { IBM297 cp297 ebcdic-cp-fr csIBM297 }
 134     { IBM420 cp420 ebcdic-cp-ar1 csIBM420 }
 135     { IBM423 cp423 ebcdic-cp-gr csIBM423 }
 136     { IBM424 cp424 ebcdic-cp-he csIBM424 }
 137     { IBM437 cp437 437 csPC8CodePage437 }
 138     { IBM500 CP500 ebcdic-cp-be ebcdic-cp-ch csIBM500 }
 139     { IBM775 cp775 csPC775Baltic }
 140     { IBM850 cp850 850 csPC850Multilingual }
 141     { IBM851 cp851 851 csIBM851 }
 142     { IBM852 cp852 852 csPCp852 }
 143     { IBM855 cp855 855 csIBM855 }
 144     { IBM857 cp857 857 csIBM857 }
 145     { IBM860 cp860 860 csIBM860 }
 146     { IBM861 cp861 861 cp-is csIBM861 }
 147     { IBM862 cp862 862 csPC862LatinHebrew }
 148     { IBM863 cp863 863 csIBM863 }
 149     { IBM864 cp864 csIBM864 }
 150     { IBM865 cp865 865 csIBM865 }
 151     { IBM866 cp866 866 csIBM866 }
 152     { IBM868 CP868 cp-ar csIBM868 }
 153     { IBM869 cp869 869 cp-gr csIBM869 }
 154     { IBM870 CP870 ebcdic-cp-roece ebcdic-cp-yu csIBM870 }
 155     { IBM871 CP871 ebcdic-cp-is csIBM871 }
 156     { IBM880 cp880 EBCDIC-Cyrillic csIBM880 }
 157     { IBM891 cp891 csIBM891 }
 158     { IBM903 cp903 csIBM903 }
 159     { IBM904 cp904 904 csIBBM904 }
 160     { IBM905 CP905 ebcdic-cp-tr csIBM905 }
 161     { IBM918 CP918 ebcdic-cp-ar2 csIBM918 }
 162     { IBM1026 CP1026 csIBM1026 }
 163     { EBCDIC-AT-DE csIBMEBCDICATDE }
 164     { EBCDIC-AT-DE-A csEBCDICATDEA }
 165     { EBCDIC-CA-FR csEBCDICCAFR }
 166     { EBCDIC-DK-NO csEBCDICDKNO }
 167     { EBCDIC-DK-NO-A csEBCDICDKNOA }
 168     { EBCDIC-FI-SE csEBCDICFISE }
 169     { EBCDIC-FI-SE-A csEBCDICFISEA }
 170     { EBCDIC-FR csEBCDICFR }
 171     { EBCDIC-IT csEBCDICIT }
 172     { EBCDIC-PT csEBCDICPT }
 173     { EBCDIC-ES csEBCDICES }
 174     { EBCDIC-ES-A csEBCDICESA }
 175     { EBCDIC-ES-S csEBCDICESS }
 176     { EBCDIC-UK csEBCDICUK }
 177     { EBCDIC-US csEBCDICUS }
 178     { UNKNOWN-8BIT csUnknown8BiT }
 179     { MNEMONIC csMnemonic }
 180     { MNEM csMnem }
 181     { VISCII csVISCII }
 182     { VIQR csVIQR }
 183     { KOI8-R csKOI8R }
 184     { IBM00858 CCSID00858 CP00858 PC-Multilingual-850+euro }
 185     { IBM00924 CCSID00924 CP00924 ebcdic-Latin9--euro }
 186     { IBM01140 CCSID01140 CP01140 ebcdic-us-37+euro }
 187     { IBM01141 CCSID01141 CP01141 ebcdic-de-273+euro }
 188     { IBM01142 CCSID01142 CP01142 ebcdic-dk-277+euro ebcdic-no-277+euro }
 189     { IBM01143 CCSID01143 CP01143 ebcdic-fi-278+euro ebcdic-se-278+euro }
 190     { IBM01144 CCSID01144 CP01144 ebcdic-it-280+euro }
 191     { IBM01145 CCSID01145 CP01145 ebcdic-es-284+euro }
 192     { IBM01146 CCSID01146 CP01146 ebcdic-gb-285+euro }
 193     { IBM01147 CCSID01147 CP01147 ebcdic-fr-297+euro }
 194     { IBM01148 CCSID01148 CP01148 ebcdic-international-500+euro }
 195     { IBM01149 CCSID01149 CP01149 ebcdic-is-871+euro }
 196     { IBM1047 IBM-1047 }
 197     { PTCP154 csPTCP154 PT154 CP154 Cyrillic-Asian }
 198     { Amiga-1251 Ami1251 Amiga1251 Ami-1251 }
 199     { UNICODE-1-1 csUnicode11 }
 200     { CESU-8 csCESU-8 }
 201     { BOCU-1 csBOCU-1 }
 202     { UNICODE-1-1-UTF-7 csUnicode11UTF7 }
 203     { ISO-8859-14 iso-ir-199 ISO_8859-14:1998 ISO_8859-14 latin8 iso-celtic
 204       l8 }
 205     { ISO-8859-15 ISO_8859-15 Latin-9 }
 206     { ISO-8859-16 iso-ir-226 ISO_8859-16:2001 ISO_8859-16 latin10 l10 }
 207     { GBK CP936 MS936 windows-936 }
 208     { JIS_Encoding csJISEncoding }
 209     { Shift_JIS MS_Kanji csShiftJIS ShiftJIS Shift-JIS }
 210     { Extended_UNIX_Code_Packed_Format_for_Japanese csEUCPkdFmtJapanese
 211       EUC-JP }
 212     { Extended_UNIX_Code_Fixed_Width_for_Japanese csEUCFixWidJapanese }
 213     { ISO-10646-UCS-Basic csUnicodeASCII }
 214     { ISO-10646-Unicode-Latin1 csUnicodeLatin1 ISO-10646 }
 215     { ISO-Unicode-IBM-1261 csUnicodeIBM1261 }
 216     { ISO-Unicode-IBM-1268 csUnicodeIBM1268 }
 217     { ISO-Unicode-IBM-1276 csUnicodeIBM1276 }
 218     { ISO-Unicode-IBM-1264 csUnicodeIBM1264 }
 219     { ISO-Unicode-IBM-1265 csUnicodeIBM1265 }
 220     { ISO-8859-1-Windows-3.0-Latin-1 csWindows30Latin1 }
 221     { ISO-8859-1-Windows-3.1-Latin-1 csWindows31Latin1 }
 222     { ISO-8859-2-Windows-Latin-2 csWindows31Latin2 }
 223     { ISO-8859-9-Windows-Latin-5 csWindows31Latin5 }
 224     { Adobe-Standard-Encoding csAdobeStandardEncoding }
 225     { Ventura-US csVenturaUS }
 226     { Ventura-International csVenturaInternational }
 227     { PC8-Danish-Norwegian csPC8DanishNorwegian }
 228     { PC8-Turkish csPC8Turkish }
 229     { IBM-Symbols csIBMSymbols }
 230     { IBM-Thai csIBMThai }
 231     { HP-Legal csHPLegal }
 232     { HP-Pi-font csHPPiFont }
 233     { HP-Math8 csHPMath8 }
 234     { Adobe-Symbol-Encoding csHPPSMath }
 235     { HP-DeskTop csHPDesktop }
 236     { Ventura-Math csVenturaMath }
 237     { Microsoft-Publishing csMicrosoftPublishing }
 238     { Windows-31J csWindows31J }
 239     { GB2312 csGB2312 }
 240     { Big5 csBig5 }
 241 }
 242
 243 set encoding_groups {
 244     {"" ""
 245         {"Unicode" UTF-8}
 246         {"Western" ISO-8859-1}}
 247     {we "West European"
 248         {"Western" ISO-8859-15 CP-437 CP-850 MacRoman CP-1252 Windows-1252}
 249         {"Celtic" ISO-8859-14}
 250         {"Greek" ISO-8859-14 ISO-8859-7 CP-737 CP-869 MacGreek CP-1253 Windows-1253}
 251         {"Icelandic" MacIceland MacIcelandic CP-861}
 252         {"Nordic" ISO-8859-10 CP-865}
 253         {"Portuguese" CP-860}
 254         {"South European" ISO-8859-3}}
 255     {ee "East European"
 256         {"Baltic" CP-775 ISO-8859-4 ISO-8859-13 CP-1257 Windows-1257}
 257         {"Central European" CP-852 ISO-8859-2 MacCE CP-1250 Windows-1250}
 258         {"Croatian" MacCroatian}
 259         {"Cyrillic" CP-855 ISO-8859-5 ISO-IR-111 KOI8-R MacCyrillic CP-1251 Windows-1251}
 260         {"Russian" CP-866}
 261         {"Ukrainian" KOI8-U MacUkraine MacUkrainian}
 262         {"Romanian" ISO-8859-16 MacRomania MacRomanian}}
 263     {ea "East Asian"
 264         {"Generic" ISO-2022}
 265         {"Chinese Simplified" GB2312 GB1988 GB12345 GB2312-RAW GBK EUC-CN GB18030 HZ ISO-2022-CN}
 266         {"Chinese Traditional" Big5 Big5-HKSCS EUC-TW CP-950}
 267         {"Japanese" EUC-JP ISO-2022-JP Shift-JIS JIS-0212 JIS-0208 JIS-0201 CP-932 MacJapan}
 268         {"Korean" EUC-KR UHC JOHAB ISO-2022-KR CP-949 KSC5601}}
 269     {sa "SE & SW Asian"
 270         {"Armenian" ARMSCII-8}
 271         {"Georgian" GEOSTD8}
 272         {"Thai" TIS-620 ISO-8859-11 CP-874 Windows-874 MacThai}
 273         {"Turkish" CP-857 CP857 ISO-8859-9 MacTurkish CP-1254 Windows-1254}
 274         {"Vietnamese" TCVN VISCII VPS CP-1258 Windows-1258}
 275         {"Hindi" MacDevanagari}
 276         {"Gujarati" MacGujarati}
 277         {"Gurmukhi" MacGurmukhi}}
 278     {me "Middle Eastern"
 279         {"Arabic" ISO-8859-6 Windows-1256 CP-1256 CP-864 MacArabic}
 280         {"Farsi" MacFarsi}
 281         {"Hebrew" ISO-8859-8-I Windows-1255 CP-1255 ISO-8859-8 CP-862 MacHebrew}}
 282     {mi "Misc"
 283         {"7-bit" ASCII}
 284         {"16-bit" Unicode}
 285         {"Legacy" CP-863 EBCDIC}
 286         {"Symbol" Symbol Dingbats MacDingbats MacCentEuro}}
 287 }
 288
 289 proc build_encoding_table {} {
 290         global encoding_aliases encoding_lookup_table
 291
 292         # Prepare the lookup list; cannot use lsort -nocase because
 293         # of compatibility issues with older Tcl (e.g. in msysgit)
 294         set names [list]
 295         foreach item [encoding names] {
 296                 lappend names [list [string tolower $item] $item]
 297         }
 298         set names [lsort -ascii -index 0 $names]
 299         # neither can we use lsearch -index
 300         set lnames [list]
 301         foreach item $names {
 302                 lappend lnames [lindex $item 0]
 303         }
 304
 305         foreach grp $encoding_aliases {
 306                 set target {}
 307                 foreach item $grp {
 308                         set i [lsearch -sorted -ascii $lnames \
 309                                         [string tolower $item]]
 310                         if {$i >= 0} {
 311                                 set target [lindex $names $i 1]
 312                                 break
 313                         }
 314                 }
 315                 if {$target eq {}} continue
 316                 foreach item $grp {
 317                         set encoding_lookup_table([string tolower $item]) $target
 318                 }
 319         }
 320
 321         foreach item $names {
 322                 set encoding_lookup_table([lindex $item 0]) [lindex $item 1]
 323         }
 324 }
 325
 326 proc tcl_encoding {enc} {
 327         global encoding_lookup_table
 328         if {$enc eq {}} {
 329                 return {}
 330         }
 331         if {![info exists encoding_lookup_table]} {
 332                 build_encoding_table
 333         }
 334         set enc [string tolower $enc]
 335         if {![info exists encoding_lookup_table($enc)]} {
 336                 # look for "isonnn" instead of "iso-nnn" or "iso_nnn"
 337                 if {[regsub {^(iso|cp|ibm|jis)[-_]} $enc {\1} encx]} {
 338                         set enc $encx
 339                 }
 340         }
 341         if {[info exists encoding_lookup_table($enc)]} {
 342                 return $encoding_lookup_table($enc)
 343         } else {
 344                 return {}
 345         }
 346 }
 347
 348 proc force_path_encoding {path enc} {
 349         global path_encoding_overrides last_encoding_override
 350
 351         set enc [tcl_encoding $enc]
 352         if {$enc eq {}} {
 353                 catch { unset last_encoding_override }
 354                 catch { unset path_encoding_overrides($path) }
 355         } else {
 356                 set last_encoding_override $enc
 357                 if {$path ne {}} {
 358                         set path_encoding_overrides($path) $enc
 359                 }
 360         }
 361 }
 362
 363 proc get_path_encoding {path} {
 364         global path_encoding_overrides last_encoding_override
 365
 366         if {[info exists last_encoding_override]} {
 367                 set tcl_enc $last_encoding_override
 368         } else {
 369                 set tcl_enc [tcl_encoding [get_config gui.encoding]]
 370         }
 371         if {$tcl_enc eq {}} {
 372                 set tcl_enc [encoding system]
 373         }
 374         if {$path ne {}} {
 375                 if {[info exists path_encoding_overrides($path)]} {
 376                         set enc2 $path_encoding_overrides($path)
 377                 } else {
 378                         set enc2 [tcl_encoding [gitattr $path encoding $tcl_enc]]
 379                 }
 380                 if {$enc2 ne {}} {
 381                         set tcl_enc $enc2
 382                 }
 383         }
 384         return $tcl_enc
 385 }
 386
 387 proc build_encoding_submenu {parent grp cmd} {
 388         global used_encodings
 389
 390         set mid [lindex $grp 0]
 391         set gname [mc [lindex $grp 1]]
 392
 393         set smenu {}
 394         foreach subset [lrange $grp 2 end] {
 395                 set name [mc [lindex $subset 0]]
 396
 397                 foreach enc [lrange $subset 1 end] {
 398                         set tcl_enc [tcl_encoding $enc]
 399                         if {$tcl_enc eq {}} continue
 400
 401                         if {$smenu eq {}} {
 402                                 if {$mid eq {}} {
 403                                         set smenu $parent
 404                                 } else {
 405                                         set smenu "$parent.$mid"
 406                                         menu $smenu
 407                                         $parent add cascade \
 408                                                 -label $gname \
 409                                                 -menu $smenu
 410                                 }
 411                         }
 412
 413                         if {$name ne {}} {
 414                                 set lbl "$name ($enc)"
 415                         } else {
 416                                 set lbl $enc
 417                         }
 418                         $smenu add command \
 419                                 -label $lbl \
 420                                 -command [concat $cmd [list $tcl_enc]]
 421
 422                         lappend used_encodings $tcl_enc
 423                 }
 424         }
 425 }
 426
 427 proc popup_btn_menu {m b} {
 428         tk_popup $m [winfo pointerx $b] [winfo pointery $b]
 429 }
 430
 431 proc build_encoding_menu {emenu cmd {nodef 0}} {
 432         $emenu configure -postcommand \
 433                 [list do_build_encoding_menu $emenu $cmd $nodef]
 434 }
 435
 436 proc do_build_encoding_menu {emenu cmd {nodef 0}} {
 437         global used_encodings encoding_groups
 438
 439         $emenu configure -postcommand {}
 440
 441         if {!$nodef} {
 442                 $emenu add command \
 443                         -label [mc "Default"] \
 444                         -command [concat $cmd [list {}]]
 445         }
 446         set sysenc [encoding system]
 447         $emenu add command \
 448                 -label [mc "System (%s)" $sysenc] \
 449                 -command [concat $cmd [list $sysenc]]
 450
 451         # Main encoding tree
 452         set used_encodings [list identity]
 453         $emenu add separator
 454         foreach grp $encoding_groups {
 455                 build_encoding_submenu $emenu $grp $cmd
 456         }
 457
 458         # Add unclassified encodings
 459         set unused_grp [list [mc Other]]
 460         foreach enc [encoding names] {
 461                 if {[lsearch -exact $used_encodings $enc] < 0} {
 462                         lappend unused_grp $enc
 463                 }
 464         }
 465         build_encoding_submenu $emenu [list other [mc Other] $unused_grp] $cmd
 466 }