src/html/helpdata.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        helpdata.cpp
   3 // Purpose:     wxHtmlHelpData
   4 // Notes:       Based on htmlhelp.cpp, implementing a monolithic
   5 //              HTML Help controller class,  by Vaclav Slavik
   6 // Author:      Harm van der Heijden and Vaclav Slavik
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Harm van der Heijden and Vaclav Slavik
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 #pragma implementation
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #ifdef __BORLANDC__
  20 #pragma hdrstop
  21 #endif
  22
  23 #include "wx/defs.h"
  24
  25 #if wxUSE_HTML
  26
  27 #ifndef WXPRECOMP
  28 #include "wx/wx.h"
  29 #endif
  30
  31 #include "wx/html/helpdata.h"
  32 #include "wx/tokenzr.h"
  33 #include "wx/wfstream.h"
  34 #include "wx/busyinfo.h"
  35 #include "wx/html/htmlpars.h"
  36 #include "wx/html/htmldefs.h"
  37
  38 #include "wx/arrimpl.cpp"
  39 WX_DEFINE_OBJARRAY(wxHtmlBookRecArray)
  40
  41 //-----------------------------------------------------------------------------
  42 // static helper functions
  43 //-----------------------------------------------------------------------------
  44
  45 // Reads one line, stores it into buf and returns pointer to new line or NULL.
  46 static char* ReadLine(char *line, char *buf)
  47 {
  48     char *writeptr = buf, *readptr = line;
  49
  50     while (*readptr != 0 && *readptr != '\r' && *readptr != '\n') *(writeptr++) = *(readptr++);
  51     *writeptr = 0;
  52     while (*readptr == '\r' || *readptr == '\n') readptr++;
  53     if (*readptr == 0) return NULL;
  54     else return readptr;
  55 }
  56
  57
  58 static wxString SafeFileName(const wxString& s)
  59 {
  60     wxString res = s;
  61     res.Replace(wxT(":"), wxT("_"), TRUE);
  62     res.Replace(wxT(" "), wxT("_"), TRUE);
  63     res.Replace(wxT("/"), wxT("_"), TRUE);
  64     res.Replace(wxT("\\"), wxT("_"), TRUE);
  65     res.Replace(wxT("#"), wxT("_"), TRUE);
  66     res.Replace(wxT("."), wxT("_"), TRUE);
  67     return res;
  68 }
  69
  70
  71 static int LINKAGEMODE IndexCompareFunc(const void *a, const void *b)
  72 {
  73     return wxStrcmp(((wxHtmlContentsItem*)a) -> m_Name, ((wxHtmlContentsItem*)b) -> m_Name);
  74 }
  75
  76
  77 //-----------------------------------------------------------------------------
  78 // HP_Parser
  79 //-----------------------------------------------------------------------------
  80
  81 class HP_Parser : public wxHtmlParser
  82 {
  83     public:
  84         void AddText(const char* WXUNUSED(text)) { }
  85         wxObject* GetProduct() { return NULL; }
  86 };
  87
  88
  89 //-----------------------------------------------------------------------------
  90 // HP_TagHandler
  91 //-----------------------------------------------------------------------------
  92
  93 class HP_TagHandler : public wxHtmlTagHandler
  94 {
  95     private:
  96         wxString m_Name, m_Page;
  97         int m_Level;
  98         int m_ID;
  99         int m_Index;
 100         wxHtmlContentsItem *m_Items;
 101         int m_ItemsCnt;
 102         wxHtmlBookRecord *m_Book;
 103
 104     public:
 105         HP_TagHandler(wxHtmlBookRecord *b) : wxHtmlTagHandler() {m_Book = b; m_Items = NULL; m_ItemsCnt = 0; m_Name = m_Page = wxEmptyString; m_Level = 0; }
 106         wxString GetSupportedTags() { return wxT("UL,OBJECT,PARAM"); }
 107         bool HandleTag(const wxHtmlTag& tag);
 108         void WriteOut(wxHtmlContentsItem*& array, int& size);
 109         void ReadIn(wxHtmlContentsItem* array, int size);
 110 };
 111
 112
 113 bool HP_TagHandler::HandleTag(const wxHtmlTag& tag)
 114 {
 115     if (tag.GetName() == wxT("UL")) {
 116         m_Level++;
 117         ParseInner(tag);
 118         m_Level--;
 119         return TRUE;
 120     }
 121     else if (tag.GetName() == wxT("OBJECT")) {
 122         m_Name = m_Page = wxEmptyString;
 123         ParseInner(tag);
 124
 125         if (!m_Page.IsEmpty())
 126         /* should be 'if (tag.GetParam("TYPE") == "text/sitemap")'
 127            but this works fine. Valid HHW's file may contain only two
 128            object tags:
 129
 130            <OBJECT type="text/site properties">
 131                <param name="ImageType" value="Folder">
 132            </OBJECT>
 133
 134            or
 135
 136                <OBJECT type="text/sitemap">
 137                        <param name="Name" value="main page">
 138                        <param name="Local" value="another.htm">
 139                    </OBJECT>
 140
 141            We're interested in the latter. !m_Page.IsEmpty() is valid
 142            condition because text/site properties does not contain Local param
 143         */
 144         {
 145             if (m_ItemsCnt % wxHTML_REALLOC_STEP == 0)
 146                 m_Items = (wxHtmlContentsItem*) realloc(m_Items, (m_ItemsCnt + wxHTML_REALLOC_STEP) * sizeof(wxHtmlContentsItem));
 147             m_Items[m_ItemsCnt].m_Level = m_Level;
 148             m_Items[m_ItemsCnt].m_ID = m_ID;
 149             m_Items[m_ItemsCnt].m_Page = new wxChar[m_Page.Length() + 1];
 150             wxStrcpy(m_Items[m_ItemsCnt].m_Page, m_Page.c_str());
 151             m_Items[m_ItemsCnt].m_Name = new wxChar [m_Name.Length() + 1];
 152             wxStrcpy(m_Items[m_ItemsCnt].m_Name, m_Name.c_str());
 153             m_Items[m_ItemsCnt].m_Book = m_Book;
 154             m_ItemsCnt++;
 155         }
 156
 157         return TRUE;
 158     }
 159     else { // "PARAM"
 160         if (m_Name == wxEmptyString && tag.GetParam(wxT("NAME")) == wxT("Name")) m_Name = tag.GetParam(wxT("VALUE"));
 161         if (tag.GetParam(wxT("NAME")) == wxT("Local")) m_Page = tag.GetParam(wxT("VALUE"));
 162         if (tag.GetParam(wxT("NAME")) == wxT("ID")) tag.ScanParam(wxT("VALUE"), wxT("%i"), &m_ID);
 163         return FALSE;
 164     }
 165 }
 166
 167
 168
 169 void HP_TagHandler::WriteOut(wxHtmlContentsItem*& array, int& size)
 170 {
 171     array = m_Items;
 172     size = m_ItemsCnt;
 173     m_Items = NULL;
 174     m_ItemsCnt = 0;
 175 }
 176
 177 void HP_TagHandler::ReadIn(wxHtmlContentsItem* array, int size)
 178 {
 179     m_Items = array;
 180     m_ItemsCnt = size;
 181 }
 182
 183
 184
 185
 186 //-----------------------------------------------------------------------------
 187 // wxHtmlHelpData
 188 //-----------------------------------------------------------------------------
 189
 190 IMPLEMENT_DYNAMIC_CLASS(wxHtmlHelpData, wxObject)
 191
 192 wxHtmlHelpData::wxHtmlHelpData()
 193 {
 194     m_TempPath = wxEmptyString;
 195
 196     m_Contents = NULL;
 197     m_ContentsCnt = 0;
 198     m_Index = NULL;
 199     m_IndexCnt = 0;
 200 }
 201
 202 wxHtmlHelpData::~wxHtmlHelpData()
 203 {
 204     int i;
 205
 206     m_BookRecords.Empty();
 207     if (m_Contents) {
 208         for (i = 0; i < m_ContentsCnt; i++) {
 209             delete[] m_Contents[i].m_Page;
 210             delete[] m_Contents[i].m_Name;
 211         }
 212         free(m_Contents);
 213     }
 214     if (m_Index) {
 215         for (i = 0; i < m_IndexCnt; i++) {
 216             delete[] m_Index[i].m_Page;
 217             delete[] m_Index[i].m_Name;
 218         }
 219         free(m_Index);
 220     }
 221 }
 222
 223 bool wxHtmlHelpData::LoadMSProject(wxHtmlBookRecord *book, wxFileSystem& fsys, const wxString& indexfile, const wxString& contentsfile)
 224 {
 225     wxFSFile *f;
 226     char *buf;
 227     int sz;
 228     wxString string;
 229
 230     HP_Parser parser;
 231     HP_TagHandler *handler = new HP_TagHandler(book);
 232     parser.AddTagHandler(handler);
 233
 234     f = ( contentsfile.IsEmpty() ? 0 : fsys.OpenFile(contentsfile) );
 235     if (f) {
 236         sz = f -> GetStream() -> GetSize();
 237         buf = new char[sz + 1];
 238         buf[sz] = 0;
 239         f -> GetStream() -> Read(buf, sz);
 240         delete f;
 241         handler -> ReadIn(m_Contents, m_ContentsCnt);
 242         parser.Parse(buf);
 243         handler -> WriteOut(m_Contents, m_ContentsCnt);
 244         delete[] buf;
 245     }
 246
 247     f = ( indexfile.IsEmpty() ? 0 : fsys.OpenFile(indexfile) );
 248     if (f) {
 249         sz = f -> GetStream() -> GetSize();
 250         buf = new char[sz + 1];
 251         buf[sz] = 0;
 252         f -> GetStream() -> Read(buf, sz);
 253         delete f;
 254         handler -> ReadIn(m_Index, m_IndexCnt);
 255         parser.Parse(buf);
 256         handler -> WriteOut(m_Index, m_IndexCnt);
 257         delete[] buf;
 258     }
 259     return TRUE;
 260 }
 261
 262
 263 bool wxHtmlHelpData::LoadCachedBook(wxHtmlBookRecord *book, wxInputStream *f)
 264 {
 265     int i, st;
 266     int x;
 267
 268     /* load contents : */
 269
 270     f -> Read(&x, sizeof(x));
 271     st = m_ContentsCnt;
 272     m_ContentsCnt += x;
 273     m_Contents = (wxHtmlContentsItem*) realloc(m_Contents, (m_ContentsCnt / wxHTML_REALLOC_STEP + 1) * wxHTML_REALLOC_STEP * sizeof(wxHtmlContentsItem));
 274     for (i = st; i < m_ContentsCnt; i++) {
 275         f -> Read(&x, sizeof(x));
 276         m_Contents[i].m_Level = x;
 277         f -> Read(&x, sizeof(x));
 278         m_Contents[i].m_ID = x;
 279         f -> Read(&x, sizeof(x));
 280         m_Contents[i].m_Name = new wxChar[x];
 281         f -> Read(m_Contents[i].m_Name, x*sizeof(wxChar));
 282         f -> Read(&x, sizeof(x));
 283         m_Contents[i].m_Page = new wxChar[x];
 284         f -> Read(m_Contents[i].m_Page, x*sizeof(wxChar));
 285         m_Contents[i].m_Book = book;
 286     }
 287
 288     /* load index : */
 289
 290     f -> Read(&x, sizeof(x));
 291     st = m_IndexCnt;
 292     m_IndexCnt += x;
 293     m_Index = (wxHtmlContentsItem*) realloc(m_Index, (m_IndexCnt / wxHTML_REALLOC_STEP + 1) * wxHTML_REALLOC_STEP * sizeof(wxHtmlContentsItem));
 294     for (i = st; i < m_IndexCnt; i++) {
 295         f -> Read(&x, sizeof(x));
 296         m_Index[i].m_Name = new wxChar[x];
 297         f -> Read(m_Index[i].m_Name, x*sizeof(wxChar));
 298         f -> Read(&x, sizeof(x));
 299         m_Index[i].m_Page = new wxChar[x];
 300         f -> Read(m_Index[i].m_Page, x*sizeof(wxChar));
 301         m_Index[i].m_Book = book;
 302     }
 303     return TRUE;
 304 }
 305
 306
 307 bool wxHtmlHelpData::SaveCachedBook(wxHtmlBookRecord *book, wxOutputStream *f)
 308 {
 309     int i;
 310     int x;
 311
 312     /* save contents : */
 313
 314     x = 0;
 315     for (i = 0; i < m_ContentsCnt; i++) if (m_Contents[i].m_Book == book && m_Contents[i].m_Level > 0) x++;
 316     f -> Write(&x, sizeof(x));
 317     for (i = 0; i < m_ContentsCnt; i++) {
 318         if (m_Contents[i].m_Book != book || m_Contents[i].m_Level == 0) continue;
 319         x = m_Contents[i].m_Level;
 320         f -> Write(&x, sizeof(x));
 321         x = m_Contents[i].m_ID;
 322         f -> Write(&x, sizeof(x));
 323         x = wxStrlen(m_Contents[i].m_Name) + 1;
 324         f -> Write(&x, sizeof(x));
 325         f -> Write(m_Contents[i].m_Name, x*sizeof(wxChar));
 326         x = wxStrlen(m_Contents[i].m_Page) + 1;
 327         f -> Write(&x, sizeof(x));
 328         f -> Write(m_Contents[i].m_Page, x*sizeof(wxChar));
 329     }
 330
 331     /* save index : */
 332
 333     x = 0;
 334     for (i = 0; i < m_IndexCnt; i++) if (m_Index[i].m_Book == book && m_Index[i].m_Level > 0) x++;
 335     f -> Write(&x, sizeof(x));
 336     for (i = 0; i < m_IndexCnt; i++) {
 337         if (m_Index[i].m_Book != book || m_Index[i].m_Level == 0) continue;
 338         x = wxStrlen(m_Index[i].m_Name) + 1;
 339         f -> Write(&x, sizeof(x));
 340         f -> Write(m_Index[i].m_Name, x*sizeof(wxChar));
 341         x = wxStrlen(m_Index[i].m_Page) + 1;
 342         f -> Write(&x, sizeof(x));
 343         f -> Write(m_Index[i].m_Page, x*sizeof(wxChar));
 344     }
 345     return TRUE;
 346 }
 347
 348
 349 void wxHtmlHelpData::SetTempDir(const wxString& path)
 350 {
 351     if (path == wxEmptyString) m_TempPath = path;
 352     else {
 353         if (wxIsAbsolutePath(path)) m_TempPath = path;
 354         else m_TempPath = wxGetCwd() + "/" + path;
 355
 356         if (m_TempPath[m_TempPath.Length() - 1] != '/')
 357             m_TempPath << "/";
 358     }
 359 }
 360
 361
 362 bool wxHtmlHelpData::AddBookParam(const wxString& title, const wxString& contfile,
 363                                   const wxString& indexfile, const wxString& deftopic,
 364                                   const wxString& path)
 365 {
 366     wxFileSystem fsys;
 367     wxFSFile *fi;
 368     wxHtmlBookRecord *bookr;
 369     wxString safetitle;
 370
 371     if (! path.IsEmpty())
 372         fsys.ChangePathTo(path, TRUE);
 373
 374     bookr = new wxHtmlBookRecord(fsys.GetPath(), title, deftopic);
 375
 376     if (m_ContentsCnt % wxHTML_REALLOC_STEP == 0)
 377         m_Contents = (wxHtmlContentsItem*) realloc(m_Contents, (m_ContentsCnt + wxHTML_REALLOC_STEP) * sizeof(wxHtmlContentsItem));
 378     m_Contents[m_ContentsCnt].m_Level = 0;
 379     m_Contents[m_ContentsCnt].m_ID = 0;
 380     m_Contents[m_ContentsCnt].m_Page = new wxChar[deftopic.Length() + 1];
 381     wxStrcpy(m_Contents[m_ContentsCnt].m_Page, deftopic.c_str());
 382     m_Contents[m_ContentsCnt].m_Name = new wxChar [title.Length() + 1];
 383     wxStrcpy(m_Contents[m_ContentsCnt].m_Name, title.c_str());
 384     m_Contents[m_ContentsCnt].m_Book = bookr;
 385
 386     // store the contents index for later
 387     int cont_start = m_ContentsCnt++;
 388
 389     // Try to find cached binary versions:
 390     safetitle = SafeFileName(title);
 391     fi = fsys.OpenFile(safetitle + wxT(".cached"));
 392     if (fi == NULL) fi = fsys.OpenFile(m_TempPath + safetitle + wxT(".cached"));
 393     if ((fi == NULL) || (m_TempPath == wxEmptyString)) {
 394         LoadMSProject(bookr, fsys, indexfile, contfile);
 395         if (m_TempPath != wxEmptyString) {
 396             wxFileOutputStream *outs = new wxFileOutputStream(m_TempPath + safetitle + wxT(".cached"));
 397             SaveCachedBook(bookr, outs);
 398             delete outs;
 399         }
 400     } else {
 401         LoadCachedBook(bookr, fi -> GetStream());
 402         delete fi;
 403     }
 404
 405     // Now store the contents range
 406     bookr->SetContentsRange(cont_start, m_ContentsCnt);
 407
 408     m_BookRecords.Add(bookr);
 409     if (m_IndexCnt > 0)
 410         qsort(m_Index, m_IndexCnt, sizeof(wxHtmlContentsItem), IndexCompareFunc);
 411
 412     return TRUE;
 413 }
 414
 415
 416 bool wxHtmlHelpData::AddBook(const wxString& book)
 417 {
 418     if (book.Right(4).Lower() == wxT(".zip") ||
 419         book.Right(4).Lower() == wxT(".htb") /*html book*/)
 420
 421     {
 422         wxFileSystem fsys;
 423         wxString s;
 424         bool rt = FALSE;
 425
 426         s = fsys.FindFirst(book + wxT("#zip:") + wxT("*.hhp"), wxFILE);
 427         while (!s.IsEmpty())
 428         {
 429             if (AddBook(s)) rt = TRUE;
 430             s = fsys.FindNext();
 431         }
 432
 433         return rt;
 434     }
 435
 436
 437     else
 438     {
 439         wxFSFile *fi;
 440         wxFileSystem fsys;
 441         wxInputStream *s;
 442         wxString bookFull;
 443
 444         int sz;
 445         char *buff, *lineptr;
 446         char linebuf[300];
 447
 448         wxString title = _("noname"),
 449                          safetitle,
 450                          start = wxEmptyString,
 451                                  contents = wxEmptyString, index = wxEmptyString;
 452
 453         if (wxIsAbsolutePath(book)) bookFull = book;
 454         else bookFull = wxGetCwd() + "/" + book;
 455
 456         fi = fsys.OpenFile(bookFull);
 457         if (fi == NULL) return FALSE;
 458         fsys.ChangePathTo(bookFull);
 459         s = fi -> GetStream();
 460         sz = s -> GetSize();
 461         buff = new char[sz + 1];
 462         buff[sz] = 0;
 463         s -> Read(buff, sz);
 464         lineptr = buff;
 465         delete fi;
 466
 467         do {
 468             lineptr = ReadLine(lineptr, linebuf);
 469
 470             if (strstr(linebuf, "Title=") == linebuf)
 471                 title = linebuf + strlen("Title=");
 472             if (strstr(linebuf, "Default topic=") == linebuf)
 473                 start = linebuf + strlen("Default topic=");
 474             if (strstr(linebuf, "Index file=") == linebuf)
 475                 index = linebuf + strlen("Index file=");
 476             if (strstr(linebuf, "Contents file=") == linebuf)
 477                 contents = linebuf + strlen("Contents file=");
 478         } while (lineptr != NULL);
 479         delete[] buff;
 480
 481         return AddBookParam(title, contents, index, start, fsys.GetPath());
 482     }
 483 }
 484
 485 wxString wxHtmlHelpData::FindPageByName(const wxString& x)
 486 {
 487     int cnt;
 488     int i;
 489     wxFileSystem fsys;
 490     wxFSFile *f;
 491     wxString url(wxEmptyString);
 492
 493     /* 1. try to open given file: */
 494
 495     cnt = m_BookRecords.GetCount();
 496     for (i = 0; i < cnt; i++) {
 497         f = fsys.OpenFile(m_BookRecords[i].GetBasePath() + x);
 498         if (f) {
 499             url = m_BookRecords[i].GetBasePath() + x;
 500             delete f;
 501             return url;
 502         }
 503     }
 504
 505
 506     /* 2. try to find a book: */
 507
 508     for (i = 0; i < cnt; i++) {
 509         if (m_BookRecords[i].GetTitle() == x) {
 510             url = m_BookRecords[i].GetBasePath() + m_BookRecords[i].GetStart();
 511             return url;
 512         }
 513     }
 514
 515     /* 3. try to find in contents: */
 516
 517     cnt = m_ContentsCnt;
 518     for (i = 0; i < cnt; i++) {
 519         if (wxStrcmp(m_Contents[i].m_Name, x) == 0) {
 520             url = m_Contents[i].m_Book -> GetBasePath() + m_Contents[i].m_Page;
 521             return url;
 522         }
 523     }
 524
 525
 526     /* 4. try to find in index: */
 527
 528     cnt = m_IndexCnt;
 529     for (i = 0; i < cnt; i++) {
 530         if (wxStrcmp(m_Index[i].m_Name, x) == 0) {
 531             url = m_Index[i].m_Book -> GetBasePath() + m_Index[i].m_Page;
 532             return url;
 533         }
 534     }
 535
 536     return url;
 537 }
 538
 539 wxString wxHtmlHelpData::FindPageById(int id)
 540 {
 541     int i;
 542     wxString url(wxEmptyString);
 543
 544     for (i = 0; i < m_ContentsCnt; i++) {
 545         if (m_Contents[i].m_ID == id) {
 546             url = m_Contents[i].m_Book -> GetBasePath() + m_Contents[i].m_Page;
 547             return url;
 548         }
 549     }
 550
 551     return url;
 552 }
 553
 554 //----------------------------------------------------------------------------------
 555 // wxHtmlSearchStatus functions
 556 //----------------------------------------------------------------------------------
 557
 558 wxHtmlSearchStatus::wxHtmlSearchStatus(wxHtmlHelpData* data, const wxString& keyword,
 559                                        const wxString& book)
 560 {
 561     m_Data = data;
 562     m_Keyword = keyword;
 563     wxHtmlBookRecord* bookr = NULL;
 564     if (book != wxEmptyString) {
 565         // we have to search in a specific book. Find it first
 566         int i, cnt = data->m_BookRecords.GetCount();
 567         for (i = 0; i < cnt; i++)
 568             if (data->m_BookRecords[i].GetTitle() == book) {
 569                 bookr = &(data->m_BookRecords[i]);
 570                 m_CurIndex = bookr->GetContentsStart();
 571                 m_MaxIndex = bookr->GetContentsEnd();
 572                 break;
 573             }
 574         // check; we won't crash if the book doesn't exist, but it's Bad Anyway.
 575         wxASSERT(bookr);
 576     }
 577     if (! bookr) {
 578         // no book specified; search all books
 579         m_CurIndex = 0;
 580         m_MaxIndex = m_Data->m_ContentsCnt;
 581     }
 582     m_Engine.LookFor(keyword);
 583     m_Active = (m_CurIndex < m_MaxIndex);
 584     m_LastPage = wxEmptyString;
 585 }
 586
 587 bool wxHtmlSearchStatus::Search()
 588 {
 589     wxFileSystem fsys;
 590     wxFSFile *file;
 591     int i = m_CurIndex;  // shortcut
 592     bool found = FALSE;
 593
 594     if (!m_Active) {
 595     // sanity check. Illegal use, but we'll try to prevent a crash anyway
 596 #if !defined(__VISAGECPP__)
 597         wxASSERT(0);
 598 #else
 599         wxASSERT(m_Active);
 600 #endif
 601         return FALSE;
 602     }
 603
 604     m_ContentsItem = NULL;
 605     m_Name = wxEmptyString;
 606
 607     file = fsys.OpenFile(m_Data->m_Contents[i].m_Book -> GetBasePath() +
 608                          m_Data->m_Contents[i].m_Page);
 609     if (file) {
 610         if (m_LastPage != file->GetLocation()) {
 611             m_LastPage = file->GetLocation();
 612             if (m_Engine.Scan(file -> GetStream())) {
 613                 m_Name = m_Data->m_Contents[i].m_Name;
 614                 m_ContentsItem = m_Data->m_Contents + i;
 615                 found = TRUE;
 616             }
 617         }
 618         delete file;
 619     }
 620     m_Active = (++m_CurIndex < m_MaxIndex);
 621     return found;
 622 }
 623
 624
 625
 626
 627
 628
 629
 630
 631 //--------------------------------------------------------------------------------
 632 // wxSearchEngine
 633 //--------------------------------------------------------------------------------
 634
 635 void wxSearchEngine::LookFor(const wxString& keyword)
 636 {
 637     if (m_Keyword) delete[] m_Keyword;
 638     m_Keyword = new wxChar[keyword.Length() + 1];
 639     wxStrcpy(m_Keyword, keyword.c_str());
 640     for (int i = wxStrlen(m_Keyword) - 1; i >= 0; i--)
 641         if ((m_Keyword[i] >= wxT('A')) && (m_Keyword[i] <= wxT('Z')))
 642             m_Keyword[i] += wxT('a') - wxT('A');
 643 }
 644
 645
 646
 647 bool wxSearchEngine::Scan(wxInputStream *stream)
 648 {
 649     wxASSERT_MSG(m_Keyword != NULL, wxT("wxSearchEngine::LookFor must be called before scanning!"));
 650
 651     int i, j;
 652     int lng = stream ->GetSize();
 653     int wrd = wxStrlen(m_Keyword);
 654     bool found = FALSE;
 655     char *buf = new char[lng + 1];
 656     stream -> Read(buf, lng);
 657     buf[lng] = 0;
 658
 659     for (i = 0; i < lng; i++)
 660         if ((buf[i] >= 'A') && (buf[i] <= 'Z')) buf[i] += 'a' - 'A';
 661
 662     for (i = 0; i < lng - wrd; i++) {
 663         j = 0;
 664         while ((j < wrd) && (buf[i + j] == m_Keyword[j])) j++;
 665         if (j == wrd) {found = TRUE; break; }
 666     }
 667
 668     delete[] buf;
 669     return found;
 670 }
 671
 672
 673
 674
 675 #endif