src/generic/helphtml.cpp

   1 /*-*- c++ -*-********************************************************
   2  * helphtml.cpp - base class for html help systems                  *
   3  *                                                                  *
   4  * (C) 1999 by Karsten Ballüder (Ballueder@usa.net)                 *
   5  *                                                                  *
   6  * $Id$
   7  *******************************************************************/
   8 #ifdef __GNUG__
   9 #   pragma implementation "helphtml.h"
  10 #endif
  11
  12 #include   "wx/setup.h"
  13 #include   "wx/helpbase.h"
  14 #include   "wx/generic/helpext.h"
  15 #include   "wx/string.h"
  16 #include   "wx/utils.h"
  17 #include   "wx/list.h"
  18 #include   "wx/intl.h"
  19 #include   <stdio.h>
  20 #include   <ctype.h>
  21 #include   <sys/stat.h>
  22 #include   <unistd.h>
  23
  24
  25
  26 class wxExtHelpMapEntry : public wxObject
  27 {
  28 public:
  29    int      id;
  30    wxString url;
  31    wxString doc;
  32    wxExtHelpMapEntry(int iid, wxString const &iurl, wxString const &idoc)
  33       { id = iid; url = iurl; doc = idoc; }
  34 };
  35
  36 IMPLEMENT_ABSTRACT_CLASS(wxHTMLHelpControllerBase, wxHelpControllerBase)
  37
  38 /**
  39    This class implements help via an external browser.
  40    It requires the name of a directory containing the documentation
  41    and a file mapping numerical Section numbers to relative URLS.
  42 */
  43
  44 wxHTMLHelpControllerBase::wxHTMLHelpControllerBase(void)
  45 {
  46    m_MapList = (wxList*) NULL;
  47    m_NumOfEntries = 0;
  48 }
  49
  50 void
  51 wxHTMLHelpControllerBase::DeleteList(void)
  52 {
  53    if(m_MapList)
  54    {
  55       wxNode *node = m_MapList->First();
  56       while (node)
  57       {
  58          delete (wxExtHelpMapEntry *)node->Data();
  59          delete node;
  60          node = m_MapList->First();
  61       }
  62       delete m_MapList;
  63       m_MapList = (wxList*) NULL;
  64    }
  65 }
  66
  67 wxHTMLHelpControllerBase::~wxHTMLHelpControllerBase(void)
  68 {
  69    DeleteList();
  70 }
  71
  72 /** This must be called to tell the controller where to find the
  73     documentation.
  74     @param file - NOT a filename, but a directory name.
  75     @return true on success
  76 */
  77 bool
  78 wxHTMLHelpControllerBase::Initialize(const wxString& file)
  79 {
  80    return LoadFile(file);
  81 }
  82
  83
  84 // ifile is the name of the base help directory
  85 bool
  86 wxHTMLHelpControllerBase::LoadFile(const wxString& ifile)
  87 {
  88    wxString mapFile, file, url, doc;
  89    int id,i,len;
  90    char buffer[WXEXTHELP_BUFLEN];
  91
  92    wxBusyCursor b; // display a busy cursor
  93
  94    if(! ifile.IsEmpty())
  95    {
  96       file = ifile;
  97       if(! wxIsAbsolutePath(file))
  98       {
  99          wxChar* f = wxGetWorkingDirectory();
 100          file = f;
 101          delete[] f; // wxGetWorkingDirectory returns new memory
 102          file << WXEXTHELP_SEPARATOR << ifile;
 103       }
 104       else
 105          file = ifile;
 106
 107       // If a locale is set, look in file/localename, i.e.
 108       // If passed "/usr/local/myapp/help" and the current wxLocale is
 109       // set to be "de", then look in "/usr/local/myapp/help/de/"
 110       // first and fall back to "/usr/local/myapp/help" if that
 111       // doesn't exist.
 112       if(wxGetLocale() && !wxGetLocale()->GetName().IsEmpty())
 113       {
 114          wxString newfile;
 115          newfile << WXEXTHELP_SEPARATOR << wxGetLocale()->GetName();
 116          if(wxDirExists(newfile))
 117             file = newfile;
 118          else
 119          {
 120             newfile = WXEXTHELP_SEPARATOR;
 121             const wxChar *cptr = wxGetLocale()->GetName().c_str();
 122             while(*cptr && *cptr != _T('_'))
 123                newfile << *(cptr++);
 124             if(wxDirExists(newfile))
 125                file = newfile;
 126          }
 127       }
 128
 129       if(! wxDirExists(file))
 130          return FALSE;
 131
 132       mapFile << file << WXEXTHELP_SEPARATOR << WXEXTHELP_MAPFILE;
 133    }
 134    else // try to reload old file
 135       mapFile = m_MapFile;
 136
 137    if(! wxFileExists(mapFile))
 138       return FALSE;
 139
 140    DeleteList();
 141    m_MapList = new wxList;
 142    m_NumOfEntries = 0;
 143
 144    FILE *input = fopen(mapFile.fn_str(),"rt");
 145    if(! input)
 146       return FALSE;
 147    do
 148    {
 149       if(fgets(buffer,WXEXTHELP_BUFLEN,input) && *buffer != WXEXTHELP_COMMENTCHAR)
 150       {
 151          len = strlen(buffer);
 152          if(buffer[len-1] == '\n')
 153             buffer[len-1] = '\0'; // cut of trailing newline
 154          if(sscanf(buffer,"%d", &id) != 1)
 155             break; // error
 156          for(i=0; isdigit(buffer[i])||isspace(buffer[i])||buffer[i]=='-'; i++)
 157             ; // find begin of URL
 158          url = "";
 159          while(buffer[i] && ! isspace(buffer[i]) && buffer[i] !=
 160                WXEXTHELP_COMMENTCHAR)
 161             url << buffer[i++];
 162          while(buffer[i] && buffer[i] != WXEXTHELP_COMMENTCHAR)
 163             i++;
 164          doc = "";
 165          if(buffer[i])
 166             doc = (buffer + i + 1); // skip the comment character
 167          m_MapList->Append(new wxExtHelpMapEntry(id,url,doc));
 168          m_NumOfEntries++;
 169       }
 170    }while(! feof(input));
 171    fclose(input);
 172
 173    m_MapFile = file; // now it's valid
 174    return TRUE;
 175 }
 176
 177
 178 bool
 179 wxHTMLHelpControllerBase::DisplayContents(void)
 180 {
 181    if(! m_NumOfEntries)
 182       return FALSE;
 183    wxBusyCursor b; // display a busy cursor
 184    return KeywordSearch("");
 185 }
 186
 187 bool
 188 wxHTMLHelpControllerBase::DisplaySection(int sectionNo)
 189 {
 190    if(! m_NumOfEntries)
 191       return FALSE;
 192
 193    wxBusyCursor b; // display a busy cursor
 194    wxNode *node = m_MapList->First();
 195    wxExtHelpMapEntry *entry;
 196    while(node)
 197    {
 198       entry = (wxExtHelpMapEntry *)node->Data();
 199       if(entry->id == sectionNo)
 200          return DisplayHelp(entry->url);
 201       node = node->Next();
 202    }
 203    return FALSE;
 204 }
 205
 206 bool
 207 wxHTMLHelpControllerBase::DisplayBlock(long blockNo)
 208 {
 209    return DisplaySection((int)blockNo);
 210 }
 211
 212 bool
 213 wxHTMLHelpControllerBase::KeywordSearch(const wxString& k)
 214 {
 215    if(! m_NumOfEntries)
 216       return FALSE;
 217
 218    wxBusyCursor b; // display a busy cursor
 219    wxString     *choices = new wxString[m_NumOfEntries];
 220    wxString     *urls = new wxString[m_NumOfEntries];
 221    wxString compA, compB;
 222
 223    int          idx = 0, j;
 224    bool         rc;
 225    bool         showAll = k.IsEmpty();
 226    wxNode       *node = m_MapList->First();
 227    wxExtHelpMapEntry *entry;
 228
 229    compA = k; compA.LowerCase(); // we compare case insensitive
 230    while(node)
 231    {
 232       entry = (wxExtHelpMapEntry *)node->Data();
 233       compB = entry->doc; compB.LowerCase();
 234       if((showAll || compB.Contains(k)) && ! compB.IsEmpty())
 235       {
 236          urls[idx] = entry->url;
 237          // doesn't work:
 238          // choices[idx] = (**i).doc.Contains((**i).doc.Before(WXEXTHELP_COMMENTCHAR));
 239          //if(choices[idx].IsEmpty()) // didn't contain the ';'
 240          //   choices[idx] = (**i).doc;
 241          choices[idx] = "";
 242          for(j=0;entry->doc.c_str()[j]
 243                 && entry->doc.c_str()[j] != WXEXTHELP_COMMENTCHAR; j++)
 244             choices[idx] << entry->doc.c_str()[j];
 245          idx++;
 246       }
 247       node = node->Next();
 248    }
 249
 250    if(idx == 1)
 251       rc = DisplayHelp(urls[0]);
 252    else if(idx == 0)
 253    {
 254       wxMessageBox(_("No entries found."));
 255       rc = FALSE;
 256    }
 257    else
 258    {
 259       idx = wxGetSingleChoiceIndex(showAll ? _("Help Index") : _("Relevant entries:"),
 260                                    showAll ? _("Help Index") : _("Entries found"),
 261                                    idx,choices);
 262       if(idx != -1)
 263          rc = DisplayHelp(urls[idx]);
 264       else
 265          rc = FALSE;
 266    }
 267    delete[] urls;
 268    delete[] choices;
 269
 270    return rc;
 271 }
 272
 273
 274 bool
 275 wxHTMLHelpControllerBase::Quit(void)
 276 {
 277    return TRUE;
 278 }
 279
 280 void
 281 wxHTMLHelpControllerBase::OnQuit(void)
 282 {
 283 }
 284