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(":", "_", TRUE);
  62     res.Replace(" ", "_", TRUE);
  63     res.Replace("/", "_", TRUE);
  64     res.Replace("\\", "_", TRUE);
  65     res.Replace("#", "_", TRUE);
  66     res.Replace(".", "_", TRUE);
  67     return res;
  68 }
  69
  70
  71 static int IndexCompareFunc(const void *a, const void *b)
  72 {
  73     return strcmp(((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 "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() == "UL") {
 116         m_Level++;
 117         ParseInner(tag);
 118         m_Level--;
 119         return TRUE;
 120     }
 121
 122     else if (tag.GetName() == "OBJECT") {
 123         m_Name = m_Page = wxEmptyString;
 124         ParseInner(tag);
 125         if (m_Page != wxEmptyString) {
 126             if (m_ItemsCnt % HTML_REALLOC_STEP == 0)
 127                 m_Items = (wxHtmlContentsItem*) realloc(m_Items, (m_ItemsCnt + HTML_REALLOC_STEP) * sizeof(wxHtmlContentsItem));
 128             m_Items[m_ItemsCnt].m_Level = m_Level;
 129             m_Items[m_ItemsCnt].m_ID = m_ID;
 130             m_Items[m_ItemsCnt].m_Page = new char[m_Page.Length() + 1];
 131             strcpy(m_Items[m_ItemsCnt].m_Page, m_Page.c_str());
 132             m_Items[m_ItemsCnt].m_Name = new char [m_Name.Length() + 1];
 133             strcpy(m_Items[m_ItemsCnt].m_Name, m_Name.c_str());
 134             m_Items[m_ItemsCnt].m_Book = m_Book;
 135             m_ItemsCnt++;
 136         }
 137         return TRUE;
 138     }
 139
 140     else { // "PARAM"
 141         if (m_Name == wxEmptyString && tag.GetParam("NAME") == "Name") m_Name = tag.GetParam("VALUE");
 142         if (tag.GetParam("NAME") == "Local") m_Page = tag.GetParam("VALUE");
 143         if (tag.GetParam("NAME") == "ID") tag.ScanParam("VALUE", "%i", &m_ID);
 144         return FALSE;
 145     }
 146 }
 147
 148
 149
 150 void HP_TagHandler::WriteOut(wxHtmlContentsItem*& array, int& size)
 151 {
 152     array = m_Items;
 153     size = m_ItemsCnt;
 154     m_Items = NULL;
 155     m_ItemsCnt = 0;
 156 }
 157
 158 void HP_TagHandler::ReadIn(wxHtmlContentsItem* array, int size)
 159 {
 160     m_Items = array;
 161     m_ItemsCnt = size;
 162 }
 163
 164 //-----------------------------------------------------------------------------
 165 // wxHtmlHelpData
 166 //-----------------------------------------------------------------------------
 167
 168 IMPLEMENT_DYNAMIC_CLASS(wxHtmlHelpData, wxObject)
 169
 170 wxHtmlHelpData::wxHtmlHelpData()
 171 {
 172     m_TempPath = wxEmptyString;
 173
 174     m_Contents = NULL;
 175     m_ContentsCnt = 0;
 176     m_Index = NULL;
 177     m_IndexCnt = 0;
 178 }
 179
 180 wxHtmlHelpData::~wxHtmlHelpData()
 181 {
 182     int i;
 183
 184     m_BookRecords.Empty();
 185     if (m_Contents) {
 186         for (i = 0; i < m_ContentsCnt; i++) {
 187             delete[] m_Contents[i].m_Page;
 188             delete[] m_Contents[i].m_Name;
 189         }
 190         free(m_Contents);
 191     }
 192     if (m_Index) {
 193         for (i = 0; i < m_IndexCnt; i++) {
 194             delete[] m_Index[i].m_Page;
 195             delete[] m_Index[i].m_Name;
 196         }
 197         free(m_Index);
 198     }
 199 }
 200
 201 bool wxHtmlHelpData::LoadMSProject(wxHtmlBookRecord *book, wxFileSystem& fsys, const wxString& indexfile, const wxString& contentsfile)
 202 {
 203     wxFSFile *f;
 204     char *buf;
 205     int sz;
 206     wxString string;
 207
 208     HP_Parser parser;
 209     HP_TagHandler *handler = new HP_TagHandler(book);
 210     parser.AddTagHandler(handler);
 211
 212     f = ( contentsfile.IsEmpty() ? NULL : fsys.OpenFile(contentsfile) );
 213     if (f) {
 214         sz = f -> GetStream() -> GetSize();
 215         buf = new char[sz+1];
 216         buf[sz] = 0;
 217         f -> GetStream() -> Read(buf, sz);
 218         delete f;
 219         handler -> ReadIn(m_Contents, m_ContentsCnt);
 220         parser.Parse(buf);
 221         handler -> WriteOut(m_Contents, m_ContentsCnt);
 222         delete[] buf;
 223     }
 224
 225     f = ( indexfile.IsEmpty() ? NULL : fsys.OpenFile(indexfile) );
 226     if (f) {
 227         sz = f -> GetStream() -> GetSize();
 228         buf = new  char[sz+1];
 229         buf[sz] = 0;
 230         f -> GetStream() -> Read(buf, sz);
 231         delete f;
 232         handler -> ReadIn(m_Index, m_IndexCnt);
 233         parser.Parse(buf);
 234         handler -> WriteOut(m_Index, m_IndexCnt);
 235         delete[] buf;
 236     }
 237     return TRUE;
 238 }
 239
 240
 241 bool wxHtmlHelpData::LoadCachedBook(wxHtmlBookRecord *book, wxInputStream *f)
 242 {
 243     int i, st;
 244     int x;
 245
 246     /* load contents : */
 247
 248     f -> Read(&x, sizeof(x));
 249     st = m_ContentsCnt;
 250     m_ContentsCnt += x;
 251     m_Contents = (wxHtmlContentsItem*) realloc(m_Contents, (m_ContentsCnt / HTML_REALLOC_STEP + 1) * HTML_REALLOC_STEP * sizeof(wxHtmlContentsItem));
 252     for (i = st; i < m_ContentsCnt; i++) {
 253         f -> Read(&x, sizeof(x));
 254         m_Contents[i].m_Level = x;
 255         f -> Read(&x, sizeof(x));
 256         m_Contents[i].m_ID = x;
 257         f -> Read(&x, sizeof(x));
 258         m_Contents[i].m_Name = new char[x];
 259         f -> Read(m_Contents[i].m_Name, x);
 260         f -> Read(&x, sizeof(x));
 261         m_Contents[i].m_Page = new char[x];
 262         f -> Read(m_Contents[i].m_Page, x);
 263         m_Contents[i].m_Book = book;
 264     }
 265
 266     /* load index : */
 267
 268     f -> Read(&x, sizeof(x));
 269     st = m_IndexCnt;
 270     m_IndexCnt += x;
 271     m_Index = (wxHtmlContentsItem*) realloc(m_Index, (m_IndexCnt / HTML_REALLOC_STEP + 1) * HTML_REALLOC_STEP * sizeof(wxHtmlContentsItem));
 272     for (i = st; i < m_IndexCnt; i++) {
 273         f -> Read(&x, sizeof(x));
 274         m_Index[i].m_Name = new char[x];
 275         f -> Read(m_Index[i].m_Name, x);
 276         f -> Read(&x, sizeof(x));
 277         m_Index[i].m_Page = new char[x];
 278         f -> Read(m_Index[i].m_Page, x);
 279         m_Index[i].m_Book = book;
 280     }
 281     return TRUE;
 282 }
 283
 284
 285 bool wxHtmlHelpData::SaveCachedBook(wxHtmlBookRecord *book, wxOutputStream *f)
 286 {
 287     int i;
 288     int x;
 289
 290     /* save contents : */
 291
 292     x = 0;
 293     for (i = 0; i < m_ContentsCnt; i++) if (m_Contents[i].m_Book == book && m_Contents[i].m_Level > 0) x++;
 294     f -> Write(&x, sizeof(x));
 295     for (i = 0; i < m_ContentsCnt; i++) {
 296         if (m_Contents[i].m_Book != book || m_Contents[i].m_Level == 0) continue;
 297         x = m_Contents[i].m_Level;
 298         f -> Write(&x, sizeof(x));
 299         x = m_Contents[i].m_ID;
 300         f -> Write(&x, sizeof(x));
 301         x = strlen(m_Contents[i].m_Name) + 1;
 302         f -> Write(&x, sizeof(x));
 303         f -> Write(m_Contents[i].m_Name, x);
 304         x = strlen(m_Contents[i].m_Page) + 1;
 305         f -> Write(&x, sizeof(x));
 306         f -> Write(m_Contents[i].m_Page, x);
 307     }
 308
 309     /* save index : */
 310
 311     x = 0;
 312     for (i = 0; i < m_IndexCnt; i++) if (m_Index[i].m_Book == book && m_Index[i].m_Level > 0) x++;
 313     f -> Write(&x, sizeof(x));
 314     for (i = 0; i < m_IndexCnt; i++) {
 315         if (m_Index[i].m_Book != book || m_Index[i].m_Level == 0) continue;
 316         x = strlen(m_Index[i].m_Name) + 1;
 317         f -> Write(&x, sizeof(x));
 318         f -> Write(m_Index[i].m_Name, x);
 319         x = strlen(m_Index[i].m_Page) + 1;
 320         f -> Write(&x, sizeof(x));
 321         f -> Write(m_Index[i].m_Page, x);
 322     }
 323     return TRUE;
 324 }
 325
 326
 327 void wxHtmlHelpData::SetTempDir(const wxString& path)
 328 {
 329     if (path == wxEmptyString) m_TempPath = path;
 330     else {
 331         if (wxIsAbsolutePath(path)) m_TempPath = path;
 332         else m_TempPath = wxGetCwd() + "/" + path;
 333
 334         if (m_TempPath[m_TempPath.Length() - 1] != '/')
 335             m_TempPath << "/";
 336     }
 337 }
 338
 339
 340 bool wxHtmlHelpData::AddBookParam(const wxString& title, const wxString& contfile,
 341                                   const wxString& indexfile, const wxString& deftopic,
 342                                   const wxString& path)
 343 {
 344     wxFileSystem fsys;
 345     wxFSFile *fi;
 346     wxHtmlBookRecord *bookr;
 347     wxString safetitle;
 348
 349     if (! path.IsEmpty())
 350             // workaround for bug in ChangePathTo(name, TRUE)
 351             fsys.ChangePathTo(path+"/gaga");
 352
 353     bookr = new wxHtmlBookRecord(path+'/', title, deftopic);
 354
 355     if (m_ContentsCnt % HTML_REALLOC_STEP == 0)
 356         m_Contents = (wxHtmlContentsItem*) realloc(m_Contents, (m_ContentsCnt + HTML_REALLOC_STEP) * sizeof(wxHtmlContentsItem));
 357     m_Contents[m_ContentsCnt].m_Level = 0;
 358     m_Contents[m_ContentsCnt].m_ID = 0;
 359     m_Contents[m_ContentsCnt].m_Page = new char[deftopic.Length() + 1];
 360     strcpy(m_Contents[m_ContentsCnt].m_Page, deftopic.c_str());
 361     m_Contents[m_ContentsCnt].m_Name = new char [title.Length() + 1];
 362     strcpy(m_Contents[m_ContentsCnt].m_Name, title.c_str());
 363     m_Contents[m_ContentsCnt].m_Book = bookr;
 364
 365     // store the contents index for later
 366     int cont_start = m_ContentsCnt++;
 367
 368     // Try to find cached binary versions:
 369     safetitle = SafeFileName(title);
 370     fi = fsys.OpenFile(safetitle + ".cached");
 371     if (fi == NULL) fi = fsys.OpenFile(m_TempPath + safetitle + ".cached");
 372     if ((fi == NULL) || (m_TempPath == wxEmptyString)) {
 373         LoadMSProject(bookr, fsys, indexfile, contfile);
 374         if (m_TempPath != wxEmptyString) {
 375                 wxFileOutputStream *outs = new wxFileOutputStream(m_TempPath + safetitle + ".cached");
 376             SaveCachedBook(bookr, outs);
 377             delete outs;
 378         }
 379     }
 380     else {
 381         LoadCachedBook(bookr, fi -> GetStream());
 382         delete fi;
 383     }
 384
 385     // Now store the contents range
 386     bookr->SetContentsRange(cont_start, m_ContentsCnt);
 387
 388     m_BookRecords.Add(bookr);
 389     if (m_IndexCnt > 0)
 390         qsort(m_Index, m_IndexCnt, sizeof(wxHtmlContentsItem), IndexCompareFunc);
 391
 392     return TRUE;
 393 }
 394
 395
 396 bool wxHtmlHelpData::AddBook(const wxString& book)
 397 {
 398     wxFSFile *fi;
 399     wxFileSystem fsys;
 400     wxInputStream *s;
 401     wxString bookFull;
 402
 403     int sz;
 404     char *buff, *lineptr;
 405     char linebuf[300];
 406
 407     wxString title = _("noname"),
 408              safetitle,
 409              start = wxEmptyString,
 410              contents = wxEmptyString, index = wxEmptyString;
 411
 412     if (wxIsAbsolutePath(book)) bookFull = book;
 413     else bookFull = wxGetCwd() + "/" + book;
 414
 415     fi = fsys.OpenFile(bookFull);
 416     if (fi == NULL) return FALSE;
 417     fsys.ChangePathTo(bookFull);
 418     s = fi -> GetStream();
 419     sz = s -> GetSize();
 420     buff = new char[sz+1];
 421     buff[sz] = 0;
 422     s -> Read(buff, sz);
 423     lineptr = buff;
 424     delete fi;
 425
 426     while ((lineptr = ReadLine(lineptr, linebuf)) != NULL) {
 427         if (strstr(linebuf, "Title=") == linebuf)
 428             title = linebuf + strlen("Title=");
 429         if (strstr(linebuf, "Default topic=") == linebuf)
 430             start = linebuf + strlen("Default topic=");
 431         if (strstr(linebuf, "Index file=") == linebuf)
 432             index = linebuf + strlen("Index file=");
 433         if (strstr(linebuf, "Contents file=") == linebuf)
 434             contents = linebuf + strlen("Contents file=");
 435     }
 436     delete[] buff;
 437
 438     return AddBookParam(title, contents, index, start, fsys.GetPath());
 439 }
 440
 441 wxString wxHtmlHelpData::FindPageByName(const wxString& x)
 442 {
 443     int cnt;
 444     int i;
 445     wxFileSystem fsys;
 446     wxFSFile *f;
 447     wxString url(wxEmptyString);
 448
 449     /* 1. try to open given file: */
 450
 451     cnt = m_BookRecords.GetCount();
 452     for (i = 0; i < cnt; i++) {
 453         f = fsys.OpenFile(m_BookRecords[i].GetBasePath() + x);
 454         if (f) {
 455             url = m_BookRecords[i].GetBasePath() + x;
 456             delete f;
 457             return url;
 458         }
 459     }
 460
 461
 462     /* 2. try to find a book: */
 463
 464     for (i = 0; i < cnt; i++) {
 465         if (m_BookRecords[i].GetTitle() == x) {
 466             url = m_BookRecords[i].GetBasePath() + m_BookRecords[i].GetStart();
 467             return url;
 468         }
 469     }
 470
 471     /* 3. try to find in contents: */
 472
 473     cnt = m_ContentsCnt;
 474     for (i = 0; i < cnt; i++) {
 475         if (strcmp(m_Contents[i].m_Name, x) == 0) {
 476             url = m_Contents[i].m_Book -> GetBasePath() + m_Contents[i].m_Page;
 477             return url;
 478         }
 479     }
 480
 481
 482     /* 4. try to find in index: */
 483
 484     cnt = m_IndexCnt;
 485     for (i = 0; i < cnt; i++) {
 486         if (strcmp(m_Index[i].m_Name, x) == 0) {
 487             url = m_Index[i].m_Book -> GetBasePath() + m_Index[i].m_Page;
 488             return url;
 489         }
 490     }
 491
 492     return url;
 493 }
 494
 495 wxString wxHtmlHelpData::FindPageById(int id)
 496 {
 497     int i;
 498     wxString url(wxEmptyString);
 499
 500     for (i = 0; i < m_ContentsCnt; i++) {
 501         if (m_Contents[i].m_ID == id) {
 502             url = m_Contents[i].m_Book -> GetBasePath() + m_Contents[i].m_Page;
 503             return url;
 504         }
 505     }
 506
 507     return url;
 508 }
 509
 510 //----------------------------------------------------------------------------------
 511 // wxHtmlSearchStatus functions
 512 //----------------------------------------------------------------------------------
 513
 514 wxHtmlSearchStatus::wxHtmlSearchStatus(wxHtmlHelpData* data, const wxString& keyword,
 515                                        const wxString& book)
 516 {
 517     m_Data = data;
 518     m_Keyword = keyword;
 519     wxHtmlBookRecord* bookr = NULL;
 520     if (book != wxEmptyString) {
 521         // we have to search in a specific book. Find it first
 522         int i,cnt = data->m_BookRecords.GetCount();
 523         for (i=0; i<cnt; i++)
 524             if (data->m_BookRecords[i].GetTitle() == book) {
 525                 bookr = &(data->m_BookRecords[i]);
 526                 m_CurIndex = bookr->GetContentsStart();
 527                 m_MaxIndex = bookr->GetContentsEnd();
 528                 break;
 529             }
 530         // check; we won't crash if the book doesn't exist, but it's Bad Anyway.
 531         wxASSERT(bookr);
 532     }
 533     if (! bookr) {
 534         // no book specified; search all books
 535         m_CurIndex = 0;
 536         m_MaxIndex = m_Data->m_ContentsCnt;
 537     }
 538     m_Engine.LookFor(keyword);
 539     m_Active = (m_CurIndex < m_MaxIndex);
 540     m_LastPage = wxEmptyString;
 541 }
 542
 543 bool wxHtmlSearchStatus::Search()
 544 {
 545     wxFileSystem fsys;
 546     wxFSFile *file;
 547     int i = m_CurIndex; // shortcut
 548     bool found = FALSE;
 549
 550     if (! m_Active) {
 551         // sanity check. Illegal use, but we'll try to prevent a crash anyway
 552         wxASSERT(0);
 553         return FALSE;
 554     }
 555
 556     m_ContentsItem = NULL;
 557     m_Name = wxEmptyString;
 558
 559     file = fsys.OpenFile(m_Data->m_Contents[i].m_Book -> GetBasePath() +
 560                          m_Data->m_Contents[i].m_Page);
 561     if (file) {
 562         if (m_LastPage != file->GetLocation()) {
 563             m_LastPage = file->GetLocation();
 564             if (m_Engine.Scan(file -> GetStream())) {
 565                 m_Name = m_Data->m_Contents[i].m_Name;
 566                 m_ContentsItem = m_Data->m_Contents + i;
 567                 found = TRUE;
 568             }
 569         }
 570         delete file;
 571     }
 572     m_Active = (++m_CurIndex < m_MaxIndex);
 573     return found;
 574 }
 575
 576 #endif