src/os2/mimetype.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/os2/mimetype.cpp
   3 // Purpose:     classes and functions to manage MIME types
   4 // Author:      David Webster
   5 // Modified by:
   6 // Created:     01.21.00
   7 // RCS-ID:      $Id$
   8 // Copyright:   Adopted from msw port --(c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
   9 // Licence:     wxWindows licence (part of wxExtra library)
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #if wxUSE_MIMETYPE
  16
  17 #include "wx/os2/mimetype.h"
  18
  19 #ifndef WX_PRECOMP
  20     #include "wx/dynarray.h"
  21     #include "wx/string.h"
  22     #include "wx/intl.h"
  23     #include "wx/log.h"
  24     #if wxUSE_GUI
  25         #include "wx/icon.h"
  26     #endif
  27 #endif //WX_PRECOMP
  28
  29 #define INCL_DOS
  30 #define INCL_GPI
  31 #define INCL_WIN
  32 #include <os2.h>
  33
  34 #include "wx/file.h"
  35 #include "wx/iconloc.h"
  36 #include "wx/confbase.h"
  37
  38 // other standard headers
  39 #include <ctype.h>
  40
  41 // in case we're compiling in non-GUI mode
  42 class WXDLLEXPORT wxIcon;
  43
  44 // These classes use Windows registry to retrieve the required information.
  45 //
  46 // Keys used (not all of them are documented, so it might actually stop working
  47 // in futur versions of Windows...):
  48 //  1. "HKCR\MIME\Database\Content Type" contains subkeys for all known MIME
  49 //     types, each key has a string value "Extension" which gives (dot preceded)
  50 //     extension for the files of this MIME type.
  51 //
  52 //  2. "HKCR\.ext" contains
  53 //   a) unnamed value containing the "filetype"
  54 //   b) value "Content Type" containing the MIME type
  55 //
  56 // 3. "HKCR\filetype" contains
  57 //   a) unnamed value containing the description
  58 //   b) subkey "DefaultIcon" with single unnamed value giving the icon index in
  59 //      an icon file
  60 //   c) shell\open\command and shell\open\print subkeys containing the commands
  61 //      to open/print the file (the positional parameters are introduced by %1,
  62 //      %2, ... in these strings, we change them to %s ourselves)
  63
  64 // although I don't know of any official documentation which mentions this
  65 // location, uses it, so it isn't likely to change
  66 static const wxChar *MIME_DATABASE_KEY = wxT("MIME\\Database\\Content Type\\");
  67
  68 wxString wxFileTypeImpl::GetCommand(const wxChar *WXUNUSED(verb)) const
  69 {
  70 // TODO: OS/2 doesn't have a registry but uses Prf
  71 /*
  72     // suppress possible error messages
  73     wxLogNull nolog;
  74     wxString strKey;
  75
  76     if ( wxRegKey(wxRegKey::HKCR, m_ext + wxT("\\shell")).Exists() )
  77         strKey = m_ext;
  78     if ( wxRegKey(wxRegKey::HKCR, m_strFileType + wxT("\\shell")).Exists() )
  79         strKey = m_strFileType;
  80
  81     if ( !strKey )
  82     {
  83         // no info
  84         return wxEmptyString;
  85     }
  86
  87     strKey << wxT("\\shell\\") << verb;
  88     wxRegKey key(wxRegKey::HKCR, strKey + wxT("\\command"));
  89     wxString command;
  90     if ( key.Open() ) {
  91         // it's the default value of the key
  92         if ( key.QueryValue(wxT(""), command) ) {
  93             // transform it from '%1' to '%s' style format string (now also
  94             // test for %L - apparently MS started using it as well for the
  95             // same purpose)
  96
  97             // NB: we don't make any attempt to verify that the string is valid,
  98             //     i.e. doesn't contain %2, or second %1 or .... But we do make
  99             //     sure that we return a string with _exactly_ one '%s'!
 100             bool foundFilename = false;
 101             size_t len = command.Len();
 102             for ( size_t n = 0; (n < len) && !foundFilename; n++ ) {
 103                 if ( command[n] == wxT('%') &&
 104                      (n + 1 < len) &&
 105                      (command[n + 1] == wxT('1') ||
 106                       command[n + 1] == wxT('L')) ) {
 107                     // replace it with '%s'
 108                     command[n + 1] = wxT('s');
 109
 110                     foundFilename = true;
 111                 }
 112             }
 113
 114 #if wxUSE_DDE
 115             // look whether we must issue some DDE requests to the application
 116             // (and not just launch it)
 117             strKey += wxT("\\DDEExec");
 118             wxRegKey keyDDE(wxRegKey::HKCR, strKey);
 119             if ( keyDDE.Open() ) {
 120                 wxString ddeCommand, ddeServer, ddeTopic;
 121                 keyDDE.QueryValue(wxT(""), ddeCommand);
 122                 ddeCommand.Replace(wxT("%1"), wxT("%s"));
 123
 124                 wxRegKey(wxRegKey::HKCR, strKey + wxT("\\Application")).
 125                     QueryValue(wxT(""), ddeServer);
 126                 wxRegKey(wxRegKey::HKCR, strKey + wxT("\\Topic")).
 127                     QueryValue(wxT(""), ddeTopic);
 128
 129                 // HACK: we use a special feature of wxExecute which exists
 130                 //       just because we need it here: it will establish DDE
 131                 //       conversation with the program it just launched
 132                 command.Prepend(wxT("WX_DDE#"));
 133                 command << wxT('#') << ddeServer
 134                         << wxT('#') << ddeTopic
 135                         << wxT('#') << ddeCommand;
 136             }
 137             else
 138 #endif // wxUSE_DDE
 139                 if ( !foundFilename ) {
 140                 // we didn't find any '%1' - the application doesn't know which
 141                 // file to open (note that we only do it if there is no DDEExec
 142                 // subkey)
 143                 //
 144                 // HACK: append the filename at the end, hope that it will do
 145                 command << wxT(" %s");
 146             }
 147         }
 148     }
 149     //else: no such file type or no value, will return empty string
 150
 151     return command;
 152 */
 153    return wxEmptyString;
 154 }
 155
 156 bool
 157 wxFileTypeImpl::GetOpenCommand(wxString *openCmd,
 158                                const wxFileType::MessageParameters& params)
 159                                const
 160 {
 161     wxString cmd;
 162     if ( m_info ) {
 163         cmd = m_info->GetOpenCommand();
 164     }
 165     else {
 166         cmd = GetCommand(wxT("open"));
 167     }
 168
 169     *openCmd = wxFileType::ExpandCommand(cmd, params);
 170
 171     return !openCmd->empty();
 172 }
 173
 174 bool
 175 wxFileTypeImpl::GetPrintCommand(wxString *printCmd,
 176                                 const wxFileType::MessageParameters& params)
 177                                 const
 178 {
 179     wxString cmd;
 180     if ( m_info ) {
 181         cmd = m_info->GetPrintCommand();
 182     }
 183     else {
 184         cmd = GetCommand(wxT("print"));
 185     }
 186
 187     *printCmd = wxFileType::ExpandCommand(cmd, params);
 188
 189     return !printCmd->empty();
 190 }
 191
 192 // TODO this function is half implemented
 193 bool wxFileTypeImpl::GetExtensions(wxArrayString& extensions)
 194 {
 195     if ( m_info ) {
 196         extensions = m_info->GetExtensions();
 197
 198         return true;
 199     }
 200     else if ( m_ext.empty() ) {
 201         // the only way to get the list of extensions from the file type is to
 202         // scan through all extensions in the registry - too slow...
 203         return false;
 204     }
 205     else {
 206         extensions.Empty();
 207         extensions.Add(m_ext);
 208
 209         // it's a lie too, we don't return _all_ extensions...
 210         return true;
 211     }
 212 }
 213
 214 bool wxFileTypeImpl::GetMimeType(wxString *mimeType) const
 215 {
 216     if ( m_info ) {
 217         // we already have it
 218         *mimeType = m_info->GetMimeType();
 219
 220         return true;
 221     }
 222
 223     // suppress possible error messages
 224     wxLogNull nolog;
 225 // TODO:  substitue reg key stuff (maybe make a Prf class for OS/2??)
 226 /*
 227     wxRegKey key(wxRegKey::HKCR, wxT(".") + m_ext);
 228     if ( key.Open() && key.QueryValue(wxT("Content Type"), *mimeType) ) {
 229         return true;
 230     }
 231     else {
 232         return false;
 233     }
 234 */
 235     return false;
 236 }
 237
 238 bool wxFileTypeImpl::GetMimeTypes(wxArrayString& mimeTypes) const
 239 {
 240     wxString s;
 241
 242     if (GetMimeType(&s))
 243     {
 244         mimeTypes.Clear();
 245         mimeTypes.Add(s);
 246         return true;
 247     }
 248     else
 249         return false;
 250 }
 251
 252 bool wxFileTypeImpl::GetIcon(wxIconLocation *WXUNUSED(iconLoc)) const
 253 {
 254     if ( m_info ) {
 255         // we don't have icons in the fallback resources
 256         return false;
 257     }
 258
 259     wxString strIconKey;
 260     strIconKey << m_strFileType << wxT("\\DefaultIcon");
 261
 262     // suppress possible error messages
 263     wxLogNull nolog;
 264 //TODO:
 265 /*
 266     wxRegKey key(wxRegKey::HKCR, strIconKey);
 267
 268     if ( key.Open() ) {
 269         wxString strIcon;
 270         // it's the default value of the key
 271         if ( key.QueryValue(wxEmptyString, strIcon) ) {
 272             // the format is the following: <full path to file>, <icon index>
 273             // NB: icon index may be negative as well as positive and the full
 274             //     path may contain the environment variables inside '%'
 275             wxString strFullPath = strIcon.BeforeLast(wxT(',')),
 276             strIndex = strIcon.AfterLast(wxT(','));
 277
 278             // index may be omitted, in which case BeforeLast(',') is empty and
 279             // AfterLast(',') is the whole string
 280             if ( strFullPath.empty() ) {
 281                 strFullPath = strIndex;
 282                 strIndex = wxT("0");
 283             }
 284
 285             if ( iconLoc )
 286             {
 287                 iconLoc->SetFileName(wxExpandEnvVars(strFullPath));
 288
 289                 iconLoc->SetIndex(wxAtoi(strIndex));
 290             }
 291
 292             return true;
 293         }
 294     }
 295
 296     // no such file type or no value or incorrect icon entry
 297 */
 298     return false;
 299 }
 300
 301 bool wxFileTypeImpl::GetDescription(wxString *desc) const
 302 {
 303     if ( m_info ) {
 304         // we already have it
 305         *desc = m_info->GetDescription();
 306
 307         return true;
 308     }
 309
 310     // suppress possible error messages
 311     wxLogNull nolog;
 312 // TODO:
 313 /*
 314     wxRegKey key(wxRegKey::HKCR, m_strFileType);
 315
 316     if ( key.Open() ) {
 317         // it's the default value of the key
 318         if ( key.QueryValue(wxT(""), *desc) ) {
 319             return true;
 320         }
 321     }
 322 */
 323     return false;
 324 }
 325
 326 // extension -> file type
 327 wxFileType *
 328 wxMimeTypesManagerImpl::GetFileTypeFromExtension(const wxString& ext)
 329 {
 330     // add the leading point if necessary
 331     wxString str;
 332     if ( ext[(size_t) 0] != wxT('.') ) {
 333         str = wxT('.');
 334     }
 335     str << ext;
 336
 337     // suppress possible error messages
 338     wxLogNull nolog;
 339
 340     bool knownExtension = false;
 341
 342     wxString strFileType;
 343 // TODO:
 344 /*
 345     wxRegKey key(wxRegKey::HKCR, str);
 346     if ( key.Open() ) {
 347         // it's the default value of the key
 348         if ( key.QueryValue(wxT(""), strFileType) ) {
 349             // create the new wxFileType object
 350             wxFileType *fileType = new wxFileType;
 351             fileType->m_impl->Init(strFileType, ext);
 352
 353             return fileType;
 354         }
 355         else {
 356             // this extension doesn't have a filetype, but it's known to the
 357             // system and may be has some other useful keys (open command or
 358             // content-type), so still return a file type object for it
 359             knownExtension = true;
 360         }
 361     }
 362 */
 363     // check the fallbacks
 364     // TODO linear search is potentially slow, perhaps we should use a sorted
 365     //      array?
 366     size_t count = m_fallbacks.GetCount();
 367     for ( size_t n = 0; n < count; n++ ) {
 368         if ( m_fallbacks[n].GetExtensions().Index(ext) != wxNOT_FOUND ) {
 369             wxFileType *fileType = new wxFileType;
 370             fileType->m_impl->Init(m_fallbacks[n]);
 371
 372             return fileType;
 373         }
 374     }
 375
 376     if ( knownExtension )
 377     {
 378         wxFileType *fileType = new wxFileType;
 379         fileType->m_impl->Init(wxEmptyString, ext);
 380
 381         return fileType;
 382     }
 383     else
 384     {
 385         // unknown extension
 386         return NULL;
 387     }
 388 }
 389
 390 // MIME type -> extension -> file type
 391 wxFileType *
 392 wxMimeTypesManagerImpl::GetFileTypeFromMimeType(const wxString& mimeType)
 393 {
 394     wxString strKey = MIME_DATABASE_KEY;
 395     strKey << mimeType;
 396
 397     // suppress possible error messages
 398     wxLogNull nolog;
 399
 400     wxString ext;
 401 // TODO:
 402 /*
 403     wxRegKey key(wxRegKey::HKCR, strKey);
 404     if ( key.Open() ) {
 405         if ( key.QueryValue(wxT("Extension"), ext) ) {
 406             return GetFileTypeFromExtension(ext);
 407         }
 408     }
 409
 410     // check the fallbacks
 411     // TODO linear search is potentially slow, perhaps we should use a sorted
 412     //      array?
 413     size_t count = m_fallbacks.GetCount();
 414     for ( size_t n = 0; n < count; n++ ) {
 415         if ( wxMimeTypesManager::IsOfType(mimeType,
 416                                           m_fallbacks[n].GetMimeType()) ) {
 417             wxFileType *fileType = new wxFileType;
 418             fileType->m_impl->Init(m_fallbacks[n]);
 419
 420             return fileType;
 421         }
 422     }
 423 */
 424     // unknown MIME type
 425     return NULL;
 426 }
 427
 428 size_t wxMimeTypesManagerImpl::EnumAllFileTypes(wxArrayString& WXUNUSED(mimetypes))
 429 {
 430     // enumerate all keys under MIME_DATABASE_KEY
 431 // TODO:
 432 /*
 433     wxRegKey key(wxRegKey::HKCR, MIME_DATABASE_KEY);
 434
 435     wxString type;
 436     long cookie;
 437     bool cont = key.GetFirstKey(type, cookie);
 438     while ( cont )
 439     {
 440         mimetypes.Add(type);
 441
 442         cont = key.GetNextKey(type, cookie);
 443     }
 444
 445     return mimetypes.GetCount();
 446 */
 447   return 0;
 448 }
 449
 450 #endif //wxUSE_MIMETYPE