src/generic/helphtml.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        helphtml.cpp
   3 // Purpose:     base class for html help systems
   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 "helphtml.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 #ifndef __MWERKS__
  40 #include <sys/stat.h>
  41 #endif
  42
  43 #ifndef __WINDOWS__
  44     #include   <unistd.h>
  45 #endif
  46
  47 #define CONTENTS_ID   0
  48
  49 class wxExtHelpMapEntry : public wxObject
  50 {
  51 public:
  52    int      id;
  53    wxString url;
  54    wxString doc;
  55    wxExtHelpMapEntry(int iid, wxString const &iurl, wxString const &idoc)
  56       { id = iid; url = iurl; doc = idoc; }
  57 };
  58
  59 IMPLEMENT_ABSTRACT_CLASS(wxHTMLHelpControllerBase, wxHelpControllerBase)
  60
  61 /**
  62    This class implements help via an external browser.
  63    It requires the name of a directory containing the documentation
  64    and a file mapping numerical Section numbers to relative URLS.
  65 */
  66
  67 wxHTMLHelpControllerBase::wxHTMLHelpControllerBase()
  68 {
  69    m_MapList = (wxList*) NULL;
  70    m_NumOfEntries = 0;
  71 }
  72
  73 void
  74 wxHTMLHelpControllerBase::DeleteList()
  75 {
  76    if(m_MapList)
  77    {
  78       wxNode *node = m_MapList->First();
  79       while (node)
  80       {
  81          delete (wxExtHelpMapEntry *)node->Data();
  82          delete node;
  83          node = m_MapList->First();
  84       }
  85       delete m_MapList;
  86       m_MapList = (wxList*) NULL;
  87    }
  88 }
  89
  90 wxHTMLHelpControllerBase::~wxHTMLHelpControllerBase()
  91 {
  92    DeleteList();
  93 }
  94
  95 /** This must be called to tell the controller where to find the
  96     documentation.
  97     @param file - NOT a filename, but a directory name.
  98     @return true on success
  99 */
 100 bool
 101 wxHTMLHelpControllerBase::Initialize(const wxString& file)
 102 {
 103    return LoadFile(file);
 104 }
 105
 106
 107 // ifile is the name of the base help directory
 108 bool
 109 wxHTMLHelpControllerBase::LoadFile(const wxString& ifile)
 110 {
 111    wxString mapFile, file, url, doc;
 112    int id,i,len;
 113    char buffer[WXEXTHELP_BUFLEN];
 114
 115    wxBusyCursor b; // display a busy cursor
 116
 117    if(! ifile.IsEmpty())
 118    {
 119       file = ifile;
 120       if(! wxIsAbsolutePath(file))
 121       {
 122          wxChar* f = wxGetWorkingDirectory();
 123          file = f;
 124          delete[] f; // wxGetWorkingDirectory returns new memory
 125          file << WXEXTHELP_SEPARATOR << ifile;
 126       }
 127       else
 128          file = ifile;
 129
 130 #if wxUSE_INTL
 131       // If a locale is set, look in file/localename, i.e.
 132       // If passed "/usr/local/myapp/help" and the current wxLocale is
 133       // set to be "de", then look in "/usr/local/myapp/help/de/"
 134       // first and fall back to "/usr/local/myapp/help" if that
 135       // doesn't exist.
 136       if(wxGetLocale() && !wxGetLocale()->GetName().IsEmpty())
 137       {
 138          wxString newfile;
 139          newfile << WXEXTHELP_SEPARATOR << wxGetLocale()->GetName();
 140          if(wxDirExists(newfile))
 141             file = newfile;
 142          else
 143          {
 144             newfile = WXEXTHELP_SEPARATOR;
 145             const wxChar *cptr = wxGetLocale()->GetName().c_str();
 146             while(*cptr && *cptr != wxT('_'))
 147                newfile << *(cptr++);
 148             if(wxDirExists(newfile))
 149                file = newfile;
 150          }
 151       }
 152 #endif
 153
 154       if(! wxDirExists(file))
 155          return FALSE;
 156
 157       mapFile << file << WXEXTHELP_SEPARATOR << WXEXTHELP_MAPFILE;
 158    }
 159    else // try to reload old file
 160       mapFile = m_MapFile;
 161
 162    if(! wxFileExists(mapFile))
 163       return FALSE;
 164
 165    DeleteList();
 166    m_MapList = new wxList;
 167    m_NumOfEntries = 0;
 168
 169    FILE *input = fopen(mapFile.fn_str(),"rt");
 170    if(! input)
 171       return FALSE;
 172    do
 173    {
 174       if(fgets(buffer,WXEXTHELP_BUFLEN,input) && *buffer != WXEXTHELP_COMMENTCHAR)
 175       {
 176          len = strlen(buffer);
 177          if(buffer[len-1] == '\n')
 178             buffer[len-1] = '\0'; // cut of trailing newline
 179          if(sscanf(buffer,"%d", &id) != 1)
 180             break; // error
 181          for(i=0; isdigit(buffer[i])||isspace(buffer[i])||buffer[i]=='-'; i++)
 182             ; // find begin of URL
 183          url = "";
 184          while(buffer[i] && ! isspace(buffer[i]) && buffer[i] !=
 185                WXEXTHELP_COMMENTCHAR)
 186             url << buffer[i++];
 187          while(buffer[i] && buffer[i] != WXEXTHELP_COMMENTCHAR)
 188             i++;
 189          doc = "";
 190          if(buffer[i])
 191             doc = (buffer + i + 1); // skip the comment character
 192          m_MapList->Append(new wxExtHelpMapEntry(id,url,doc));
 193          m_NumOfEntries++;
 194       }
 195    }while(! feof(input));
 196    fclose(input);
 197
 198    m_MapFile = file; // now it's valid
 199    return TRUE;
 200 }
 201
 202
 203 bool
 204 wxHTMLHelpControllerBase::DisplayContents()
 205 {
 206    if(! m_NumOfEntries)
 207       return FALSE;
 208
 209    wxString contents;
 210    wxNode *node = m_MapList->First();
 211    wxExtHelpMapEntry *entry;
 212    while(node)
 213    {
 214       entry = (wxExtHelpMapEntry *)node->Data();
 215       if(entry->id == CONTENTS_ID)
 216       {
 217          contents = entry->url;
 218          break;
 219       }
 220       node = node->Next();
 221    }
 222
 223    bool rc = FALSE;
 224    wxString file;
 225    file << m_MapFile << WXEXTHELP_SEPARATOR << contents;
 226    if(file.Contains(wxT('#')))
 227       file = file.BeforeLast(wxT('#'));
 228    if(contents.Length() && wxFileExists(file))
 229       rc = DisplaySection(CONTENTS_ID);
 230
 231    // if not found, open homemade toc:
 232    return rc ? TRUE : KeywordSearch(wxT(""));
 233 }
 234
 235 bool
 236 wxHTMLHelpControllerBase::DisplaySection(int sectionNo)
 237 {
 238    if(! m_NumOfEntries)
 239       return FALSE;
 240
 241    wxBusyCursor b; // display a busy cursor
 242    wxNode *node = m_MapList->First();
 243    wxExtHelpMapEntry *entry;
 244    while(node)
 245    {
 246       entry = (wxExtHelpMapEntry *)node->Data();
 247       if(entry->id == sectionNo)
 248          return DisplayHelp(entry->url);
 249       node = node->Next();
 250    }
 251    return FALSE;
 252 }
 253
 254 bool
 255 wxHTMLHelpControllerBase::DisplayBlock(long blockNo)
 256 {
 257    return DisplaySection((int)blockNo);
 258 }
 259
 260 bool
 261 wxHTMLHelpControllerBase::KeywordSearch(const wxString& k)
 262 {
 263    if(! m_NumOfEntries)
 264       return FALSE;
 265
 266    wxString     *choices = new wxString[m_NumOfEntries];
 267    wxString     *urls = new wxString[m_NumOfEntries];
 268    wxString compA, compB;
 269
 270    int          idx = 0, j;
 271    bool         rc;
 272    bool         showAll = k.IsEmpty();
 273    wxNode       *node = m_MapList->First();
 274    wxExtHelpMapEntry *entry;
 275
 276    {
 277       wxBusyCursor b; // display a busy cursor
 278       compA = k; compA.LowerCase(); // we compare case insensitive
 279       while(node)
 280       {
 281          entry = (wxExtHelpMapEntry *)node->Data();
 282          compB = entry->doc; compB.LowerCase();
 283          if((showAll || compB.Contains(k)) && ! compB.IsEmpty())
 284          {
 285             urls[idx] = entry->url;
 286             // doesn't work:
 287             // choices[idx] = (**i).doc.Contains((**i).doc.Before(WXEXTHELP_COMMENTCHAR));
 288             //if(choices[idx].IsEmpty()) // didn't contain the ';'
 289             //   choices[idx] = (**i).doc;
 290             choices[idx] = "";
 291             for(j=0;entry->doc.c_str()[j]
 292                    && entry->doc.c_str()[j] != WXEXTHELP_COMMENTCHAR; j++)
 293                choices[idx] << entry->doc.c_str()[j];
 294             idx++;
 295          }
 296          node = node->Next();
 297       }
 298    }
 299
 300    if(idx == 1)
 301       rc = DisplayHelp(urls[0]);
 302    else if(idx == 0)
 303    {
 304       wxMessageBox(_("No entries found."));
 305       rc = FALSE;
 306    }
 307    else
 308    {
 309       idx = wxGetSingleChoiceIndex(showAll ? _("Help Index") : _("Relevant entries:"),
 310                                    showAll ? _("Help Index") : _("Entries found"),
 311                                    idx,choices);
 312       if(idx != -1)
 313          rc = DisplayHelp(urls[idx]);
 314       else
 315          rc = FALSE;
 316    }
 317    delete[] urls;
 318    delete[] choices;
 319
 320    return rc;
 321 }
 322
 323
 324 bool
 325 wxHTMLHelpControllerBase::Quit()
 326 {
 327    return TRUE;
 328 }
 329
 330 void
 331 wxHTMLHelpControllerBase::OnQuit()
 332 {
 333 }
 334
 335 #endif // wxUSE_HELP