src/generic/helpext.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        helpext.cpp
   3 // Purpose:     an external help controller for wxWindows
   4 // Author:      Karsten Ballueder
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Karsten Ballueder
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 #   pragma implementation "wxexthlp.h"
  14 #endif
  15
  16 #include "wx/wxprec.h"
  17
  18 #ifdef __BORLANDC__
  19     #pragma hdrstop
  20 #endif
  21
  22 #if wxUSE_HELP
  23
  24 #ifndef WX_PRECOMP
  25     #include "wx/setup.h"
  26     #include "wx/string.h"
  27     #include "wx/utils.h"
  28     #include "wx/list.h"
  29     #include "wx/intl.h"
  30     #include "wx/msgdlg.h"
  31     #include "wx/choicdlg.h"
  32 #endif
  33
  34 #include "wx/helpbase.h"
  35 #include "wx/generic/helpext.h"
  36
  37 #include <stdio.h>
  38 #include <ctype.h>
  39 #include <sys/stat.h>
  40
  41 #if !defined(__WINDOWS__) && !defined(__OS2__)
  42     #include   <unistd.h>
  43 #endif
  44
  45 #ifdef __WXMSW__
  46 #include <windows.h>
  47 #endif
  48
  49 // ----------------------------------------------------------------------------
  50 // constants
  51 // ----------------------------------------------------------------------------
  52
  53 /// Name for map file.
  54 #define WXEXTHELP_MAPFILE   _T("wxhelp.map")
  55 /// Maximum line length in map file.
  56 #define WXEXTHELP_BUFLEN 512
  57 /// Character introducing comments/documentation field in map file.
  58 #define WXEXTHELP_COMMENTCHAR   ';'
  59
  60 #define CONTENTS_ID   0
  61
  62 IMPLEMENT_CLASS(wxExtHelpController, wxHelpControllerBase)
  63
  64 /// Name of environment variable to set help browser.
  65 #define   WXEXTHELP_ENVVAR_BROWSER   wxT("WX_HELPBROWSER")
  66 /// Is browser a netscape browser?
  67 #define   WXEXTHELP_ENVVAR_BROWSERISNETSCAPE wxT("WX_HELPBROWSER_NS")
  68
  69 /**
  70    This class implements help via an external browser.
  71    It requires the name of a directory containing the documentation
  72    and a file mapping numerical Section numbers to relative URLS.
  73 */
  74
  75 wxExtHelpController::wxExtHelpController()
  76 {
  77    m_MapList = (wxList*) NULL;
  78    m_NumOfEntries = 0;
  79    m_BrowserName = WXEXTHELP_DEFAULTBROWSER;
  80    m_BrowserIsNetscape = WXEXTHELP_DEFAULTBROWSER_IS_NETSCAPE;
  81
  82    wxChar *browser = wxGetenv(WXEXTHELP_ENVVAR_BROWSER);
  83    if(browser)
  84    {
  85       m_BrowserName = browser;
  86       browser = wxGetenv(WXEXTHELP_ENVVAR_BROWSERISNETSCAPE);
  87       m_BrowserIsNetscape = browser && (wxAtoi(browser) != 0);
  88    }
  89 }
  90
  91 wxExtHelpController::~wxExtHelpController()
  92 {
  93    DeleteList();
  94 }
  95
  96 void wxExtHelpController::SetBrowser(const wxString& browsername, bool isNetscape)
  97 {
  98    m_BrowserName = browsername;
  99    m_BrowserIsNetscape = isNetscape;
 100 }
 101
 102 // Set viewer: new, generic name for SetBrowser
 103 void wxExtHelpController::SetViewer(const wxString& viewer, long flags)
 104 {
 105     SetBrowser(viewer, ((flags & wxHELP_NETSCAPE) == wxHELP_NETSCAPE));
 106 }
 107
 108 bool
 109 wxExtHelpController::DisplayHelp(const wxString &relativeURL)
 110 {
 111    wxBusyCursor b; // display a busy cursor
 112
 113
 114 #if defined(__WXMSW__)
 115    wxString url;
 116    url << m_MapFile << '\\' << relativeURL.BeforeFirst('#');
 117    bool bOk = (int)ShellExecute(NULL, wxT("open"), url.c_str(),
 118                                 NULL, NULL, SW_SHOWNORMAL ) > 32;
 119    if ( !bOk )
 120    {
 121       wxLogSysError(_("Cannot open URL '%s'"), relativeURL.c_str());
 122       return false;
 123    }
 124    else
 125       return true;
 126
 127 #elif  defined(__WXPM__)
 128
 129    wxString url;
 130    url << m_MapFile << '\\' << relativeURL.BeforeFirst('#');
 131 //   will have to fix for OS/2, later.....DW
 132 //   bool bOk = (int)ShellExecute(NULL, "open", url,
 133 //                                NULL, NULL, SW_SHOWNORMAL ) > 32;
 134 //   if ( !bOk )
 135 //   {
 136 //      wxLogSysError(_("Cannot open URL '%s'"), relativeURL.c_str());
 137 //      return false;
 138 //   }
 139 //   else
 140       return TRUE;
 141
 142 #elif defined(__DOS__)
 143
 144    wxString command;
 145    command = m_BrowserName;
 146    command << wxT(" file://")
 147            << m_MapFile << WXEXTHELP_SEPARATOR << relativeURL;
 148    return wxExecute(command) != 0;
 149
 150 #else // UNIX
 151    wxString command;
 152
 153 #ifndef __EMX__
 154    if(m_BrowserIsNetscape) // try re-loading first
 155    {
 156       wxString lockfile;
 157       wxGetHomeDir(&lockfile);
 158 #ifdef __VMS__
 159       lockfile << WXEXTHELP_SEPARATOR << wxT(".netscape]lock.");
 160       struct stat statbuf;
 161       if(stat(lockfile.fn_str(), &statbuf) == 0)
 162 #else
 163       lockfile << WXEXTHELP_SEPARATOR << wxT(".netscape/lock");
 164       struct stat statbuf;
 165       if(lstat(lockfile.fn_str(), &statbuf) == 0)
 166       // cannot use wxFileExists, because it's a link pointing to a
 167       // non-existing location      if(wxFileExists(lockfile))
 168 #endif
 169       {
 170          long success;
 171          command << m_BrowserName << wxT(" -remote openURL(")
 172                  << wxT("file://") << m_MapFile
 173                  << WXEXTHELP_SEPARATOR << relativeURL << wxT(")");
 174          success = wxExecute(command);
 175          if(success != 0 ) // returns PID on success
 176             return TRUE;
 177       }
 178    }
 179 #endif
 180    command = m_BrowserName;
 181    command << wxT(" file://")
 182            << m_MapFile << WXEXTHELP_SEPARATOR << relativeURL;
 183    return wxExecute(command) != 0;
 184 #endif
 185 }
 186
 187 class wxExtHelpMapEntry : public wxObject
 188 {
 189 public:
 190    int      id;
 191    wxString url;
 192    wxString doc;
 193    wxExtHelpMapEntry(int iid, wxString const &iurl, wxString const &idoc)
 194       { id = iid; url = iurl; doc = idoc; }
 195 };
 196
 197 void wxExtHelpController::DeleteList()
 198 {
 199    if(m_MapList)
 200    {
 201       wxNode *node = m_MapList->GetFirst();
 202       while (node)
 203       {
 204          delete (wxExtHelpMapEntry *)node->GetData();
 205          delete node;
 206          node = m_MapList->GetFirst();
 207       }
 208       delete m_MapList;
 209       m_MapList = (wxList*) NULL;
 210    }
 211 }
 212
 213 /** This must be called to tell the controller where to find the
 214     documentation.
 215     @param file - NOT a filename, but a directory name.
 216     @return true on success
 217 */
 218 bool
 219 wxExtHelpController::Initialize(const wxString& file)
 220 {
 221    return LoadFile(file);
 222 }
 223
 224
 225 // ifile is the name of the base help directory
 226 bool wxExtHelpController::LoadFile(const wxString& ifile)
 227 {
 228    wxString mapFile, file, url, doc;
 229    int id,i,len;
 230    char buffer[WXEXTHELP_BUFLEN];
 231
 232    wxBusyCursor b; // display a busy cursor
 233
 234    if(! ifile.IsEmpty())
 235    {
 236       file = ifile;
 237       if(! wxIsAbsolutePath(file))
 238       {
 239          wxChar* f = wxGetWorkingDirectory();
 240          file = f;
 241          delete[] f; // wxGetWorkingDirectory returns new memory
 242 #ifdef __WXMAC__
 243          file << ifile;
 244 #else
 245          file << WXEXTHELP_SEPARATOR << ifile;
 246 #endif
 247       }
 248       else
 249          file = ifile;
 250
 251 #if wxUSE_INTL
 252       // If a locale is set, look in file/localename, i.e.
 253       // If passed "/usr/local/myapp/help" and the current wxLocale is
 254       // set to be "de", then look in "/usr/local/myapp/help/de/"
 255       // first and fall back to "/usr/local/myapp/help" if that
 256       // doesn't exist.
 257       if(wxGetLocale() && !wxGetLocale()->GetName().IsEmpty())
 258       {
 259          wxString newfile;
 260          newfile << WXEXTHELP_SEPARATOR << wxGetLocale()->GetName();
 261          if(wxDirExists(newfile))
 262             file = newfile;
 263          else
 264          {
 265             newfile = WXEXTHELP_SEPARATOR;
 266             const wxChar *cptr = wxGetLocale()->GetName().c_str();
 267             while(*cptr && *cptr != wxT('_'))
 268                newfile << *(cptr++);
 269             if(wxDirExists(newfile))
 270                file = newfile;
 271          }
 272       }
 273 #endif
 274
 275       if(! wxDirExists(file))
 276          return FALSE;
 277
 278       mapFile << file << WXEXTHELP_SEPARATOR << WXEXTHELP_MAPFILE;
 279    }
 280    else // try to reload old file
 281       mapFile = m_MapFile;
 282
 283    if(! wxFileExists(mapFile))
 284       return FALSE;
 285
 286    DeleteList();
 287    m_MapList = new wxList;
 288    m_NumOfEntries = 0;
 289
 290    FILE *input = wxFopen(mapFile,wxT("rt"));
 291    if(! input)
 292       return FALSE;
 293    do
 294    {
 295       if(fgets(buffer,WXEXTHELP_BUFLEN,input) && *buffer != WXEXTHELP_COMMENTCHAR)
 296       {
 297          len = strlen(buffer);
 298          if(buffer[len-1] == '\n')
 299             buffer[len-1] = '\0'; // cut of trailing newline
 300          if(sscanf(buffer,"%d", &id) != 1)
 301             break; // error
 302          for(i=0; isdigit(buffer[i])||isspace(buffer[i])||buffer[i]=='-'; i++)
 303             ; // find begin of URL
 304          url = wxT("");
 305          while(buffer[i] && ! isspace(buffer[i]) && buffer[i] !=
 306                WXEXTHELP_COMMENTCHAR)
 307             url << (wxChar) buffer[i++];
 308          while(buffer[i] && buffer[i] != WXEXTHELP_COMMENTCHAR)
 309             i++;
 310          doc = wxT("");
 311          if(buffer[i])
 312             doc = wxString::FromAscii( (buffer + i + 1) ); // skip the comment character
 313          m_MapList->Append(new wxExtHelpMapEntry(id,url,doc));
 314          m_NumOfEntries++;
 315       }
 316    }while(! feof(input));
 317    fclose(input);
 318
 319    m_MapFile = file; // now it's valid
 320    return TRUE;
 321 }
 322
 323
 324 bool
 325 wxExtHelpController::DisplayContents()
 326 {
 327    if(! m_NumOfEntries)
 328       return FALSE;
 329
 330    wxString contents;
 331    wxNode *node = m_MapList->GetFirst();
 332    wxExtHelpMapEntry *entry;
 333    while(node)
 334    {
 335       entry = (wxExtHelpMapEntry *)node->GetData();
 336       if(entry->id == CONTENTS_ID)
 337       {
 338          contents = entry->url;
 339          break;
 340       }
 341       node = node->GetNext();
 342    }
 343
 344    bool rc = FALSE;
 345    wxString file;
 346    file << m_MapFile << WXEXTHELP_SEPARATOR << contents;
 347    if(file.Contains(wxT('#')))
 348       file = file.BeforeLast(wxT('#'));
 349    if(contents.Length() && wxFileExists(file))
 350       rc = DisplaySection(CONTENTS_ID);
 351
 352    // if not found, open homemade toc:
 353    return rc ? TRUE : KeywordSearch(wxT(""));
 354 }
 355
 356 bool
 357 wxExtHelpController::DisplaySection(int sectionNo)
 358 {
 359    if(! m_NumOfEntries)
 360       return FALSE;
 361
 362    wxBusyCursor b; // display a busy cursor
 363    wxNode *node = m_MapList->GetFirst();
 364    wxExtHelpMapEntry *entry;
 365    while(node)
 366    {
 367       entry = (wxExtHelpMapEntry *)node->GetData();
 368       if(entry->id == sectionNo)
 369          return DisplayHelp(entry->url);
 370       node = node->GetNext();
 371    }
 372    return FALSE;
 373 }
 374
 375 bool wxExtHelpController::DisplaySection(const wxString& section)
 376 {
 377     bool isFilename = (section.Find(wxT(".htm")) != -1);
 378
 379     if (isFilename)
 380         return DisplayHelp(section);
 381     else
 382         return KeywordSearch(section);
 383 }
 384
 385 bool
 386 wxExtHelpController::DisplayBlock(long blockNo)
 387 {
 388    return DisplaySection((int)blockNo);
 389 }
 390
 391 bool
 392 wxExtHelpController::KeywordSearch(const wxString& k)
 393 {
 394    if(! m_NumOfEntries)
 395       return FALSE;
 396
 397    wxString     *choices = new wxString[m_NumOfEntries];
 398    wxString     *urls = new wxString[m_NumOfEntries];
 399    wxString compA, compB;
 400
 401    int          idx = 0, j;
 402    bool         rc;
 403    bool         showAll = k.IsEmpty();
 404    wxNode       *node = m_MapList->GetFirst();
 405    wxExtHelpMapEntry *entry;
 406
 407    {
 408       wxBusyCursor b; // display a busy cursor
 409       compA = k; compA.LowerCase(); // we compare case insensitive
 410       while(node)
 411       {
 412          entry = (wxExtHelpMapEntry *)node->GetData();
 413          compB = entry->doc; compB.LowerCase();
 414          if((showAll || compB.Contains(k)) && ! compB.IsEmpty())
 415          {
 416             urls[idx] = entry->url;
 417             // doesn't work:
 418             // choices[idx] = (**i).doc.Contains((**i).doc.Before(WXEXTHELP_COMMENTCHAR));
 419             //if(choices[idx].IsEmpty()) // didn't contain the ';'
 420             //   choices[idx] = (**i).doc;
 421             choices[idx] = wxT("");
 422             for(j=0;entry->doc.c_str()[j]
 423                    && entry->doc.c_str()[j] != WXEXTHELP_COMMENTCHAR; j++)
 424                choices[idx] << entry->doc.c_str()[j];
 425             idx++;
 426          }
 427          node = node->GetNext();
 428       }
 429    }
 430
 431    if(idx == 1)
 432       rc = DisplayHelp(urls[0]);
 433    else if(idx == 0)
 434    {
 435       wxMessageBox(_("No entries found."));
 436       rc = FALSE;
 437    }
 438    else
 439    {
 440       idx = wxGetSingleChoiceIndex(showAll ? _("Help Index") : _("Relevant entries:"),
 441                                    showAll ? _("Help Index") : _("Entries found"),
 442                                    idx,choices);
 443       if(idx != -1)
 444          rc = DisplayHelp(urls[idx]);
 445       else
 446          rc = FALSE;
 447    }
 448    delete[] urls;
 449    delete[] choices;
 450
 451    return rc;
 452 }
 453
 454
 455 bool wxExtHelpController::Quit()
 456 {
 457    return TRUE;
 458 }
 459
 460 void wxExtHelpController::OnQuit()
 461 {
 462 }
 463
 464
 465 #endif // wxUSE_HELP
 466