src/html/winpars.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        winpars.cpp
   3 // Purpose:     wxHtmlParser class (generic parser)
   4 // Author:      Vaclav Slavik
   5 // RCS-ID:      $Id$
   6 // Copyright:   (c) 1999 Vaclav Slavik
   7 // Licence:     wxWindows Licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10
  11 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  12 #pragma implementation "winpars.h"
  13 #endif
  14
  15 #include "wx/wxprec.h"
  16
  17 #include "wx/defs.h"
  18 #if wxUSE_HTML && wxUSE_STREAMS
  19
  20 #ifdef __BORLANDC__
  21 #pragma hdrstop
  22 #endif
  23
  24 #ifndef WXPRECOMP
  25     #include "wx/intl.h"
  26     #include "wx/dc.h"
  27 #endif
  28
  29 #include "wx/html/htmldefs.h"
  30 #include "wx/html/winpars.h"
  31 #include "wx/html/htmlwin.h"
  32 #include "wx/fontmap.h"
  33 #include "wx/log.h"
  34
  35
  36 //-----------------------------------------------------------------------------
  37 // wxHtmlWinParser
  38 //-----------------------------------------------------------------------------
  39
  40
  41 wxList wxHtmlWinParser::m_Modules;
  42
  43 wxHtmlWinParser::wxHtmlWinParser(wxHtmlWindow *wnd) : wxHtmlParser()
  44 {
  45     m_tmpStrBuf = NULL;
  46     m_tmpStrBufSize = 0;
  47     m_Window = wnd;
  48     m_Container = NULL;
  49     m_DC = NULL;
  50     m_CharHeight = m_CharWidth = 0;
  51     m_UseLink = FALSE;
  52 #if !wxUSE_UNICODE
  53     m_EncConv = NULL;
  54     m_InputEnc = wxFONTENCODING_ISO8859_1;
  55     m_OutputEnc = wxFONTENCODING_DEFAULT;
  56 #endif
  57     m_lastWordCell = NULL;
  58
  59     {
  60         int i, j, k, l, m;
  61         for (i = 0; i < 2; i++)
  62             for (j = 0; j < 2; j++)
  63                 for (k = 0; k < 2; k++)
  64                     for (l = 0; l < 2; l++)
  65                         for (m = 0; m < 7; m++)
  66                         {
  67                             m_FontsTable[i][j][k][l][m] = NULL;
  68                             m_FontsFacesTable[i][j][k][l][m] = wxEmptyString;
  69 #if !wxUSE_UNICODE
  70                             m_FontsEncTable[i][j][k][l][m] = wxFONTENCODING_DEFAULT;
  71 #endif
  72                         }
  73
  74         SetFonts(wxEmptyString, wxEmptyString, NULL);
  75     }
  76
  77     // fill in wxHtmlParser's tables:
  78     wxList::compatibility_iterator node = m_Modules.GetFirst();
  79     while (node)
  80     {
  81         wxHtmlTagsModule *mod = (wxHtmlTagsModule*) node->GetData();
  82         mod->FillHandlersTable(this);
  83         node = node->GetNext();
  84     }
  85 }
  86
  87 wxHtmlWinParser::~wxHtmlWinParser()
  88 {
  89     int i, j, k, l, m;
  90
  91     for (i = 0; i < 2; i++)
  92         for (j = 0; j < 2; j++)
  93             for (k = 0; k < 2; k++)
  94                 for (l = 0; l < 2; l++)
  95                     for (m = 0; m < 7; m++)
  96                     {
  97                         if (m_FontsTable[i][j][k][l][m] != NULL)
  98                             delete m_FontsTable[i][j][k][l][m];
  99                     }
 100 #if !wxUSE_UNICODE
 101     delete m_EncConv;
 102 #endif
 103     delete[] m_tmpStrBuf;
 104 }
 105
 106 void wxHtmlWinParser::AddModule(wxHtmlTagsModule *module)
 107 {
 108     m_Modules.Append(module);
 109 }
 110
 111 void wxHtmlWinParser::RemoveModule(wxHtmlTagsModule *module)
 112 {
 113     m_Modules.DeleteObject(module);
 114 }
 115
 116 void wxHtmlWinParser::SetFonts(wxString normal_face, wxString fixed_face,
 117                                const int *sizes)
 118 {
 119     static int default_sizes[7] =
 120         {
 121             wxHTML_FONT_SIZE_1,
 122                         wxHTML_FONT_SIZE_2,
 123                         wxHTML_FONT_SIZE_3,
 124                         wxHTML_FONT_SIZE_4,
 125                         wxHTML_FONT_SIZE_5,
 126                         wxHTML_FONT_SIZE_6,
 127                         wxHTML_FONT_SIZE_7
 128         };
 129
 130     if (sizes == NULL) sizes = default_sizes;
 131
 132     int i, j, k, l, m;
 133
 134     for (i = 0; i < 7; i++) m_FontsSizes[i] = sizes[i];
 135     m_FontFaceFixed = fixed_face;
 136     m_FontFaceNormal = normal_face;
 137
 138 #if !wxUSE_UNICODE
 139     SetInputEncoding(m_InputEnc);
 140 #endif
 141
 142     for (i = 0; i < 2; i++)
 143         for (j = 0; j < 2; j++)
 144             for (k = 0; k < 2; k++)
 145                 for (l = 0; l < 2; l++)
 146                     for (m = 0; m < 7; m++) {
 147                         if (m_FontsTable[i][j][k][l][m] != NULL)
 148                         {
 149                             delete m_FontsTable[i][j][k][l][m];
 150                             m_FontsTable[i][j][k][l][m] = NULL;
 151                         }
 152                     }
 153 }
 154
 155 void wxHtmlWinParser::InitParser(const wxString& source)
 156 {
 157     wxHtmlParser::InitParser(source);
 158     wxASSERT_MSG(m_DC != NULL, wxT("no DC assigned to wxHtmlWinParser!!"));
 159
 160     m_FontBold = m_FontItalic = m_FontUnderlined = m_FontFixed = FALSE;
 161     m_FontSize = 3; //default one
 162     CreateCurrentFont();           // we're selecting default font into
 163     m_DC->GetTextExtent( wxT("H"), &m_CharWidth, &m_CharHeight);
 164                 /* NOTE : we're not using GetCharWidth/Height() because
 165                    of differences under X and win
 166                  */
 167
 168     m_UseLink = FALSE;
 169     m_Link = wxHtmlLinkInfo( wxT(""), wxT("") );
 170     m_LinkColor.Set(0, 0, 0xFF);
 171     m_ActualColor.Set(0, 0, 0);
 172     m_Align = wxHTML_ALIGN_LEFT;
 173     m_tmpLastWasSpace = FALSE;
 174     m_lastWordCell = NULL;
 175
 176     OpenContainer();
 177     OpenContainer();
 178
 179 #if !wxUSE_UNICODE
 180     wxString charset = ExtractCharsetInformation(source);
 181     if (!charset.empty())
 182     {
 183         wxFontEncoding enc = wxFontMapper::Get()->CharsetToEncoding(charset);
 184         if (enc != wxFONTENCODING_SYSTEM)
 185           SetInputEncoding(enc);
 186     }
 187 #endif
 188
 189     m_Container->InsertCell(new wxHtmlColourCell(m_ActualColor));
 190     m_Container->InsertCell(
 191             new wxHtmlColourCell(GetWindow()->GetBackgroundColour(),
 192                                  wxHTML_CLR_BACKGROUND));
 193     m_Container->InsertCell(new wxHtmlFontCell(CreateCurrentFont()));
 194 }
 195
 196 void wxHtmlWinParser::DoneParser()
 197 {
 198     m_Container = NULL;
 199 #if !wxUSE_UNICODE
 200     SetInputEncoding(wxFONTENCODING_ISO8859_1); // for next call
 201 #endif
 202     wxHtmlParser::DoneParser();
 203 }
 204
 205 wxObject* wxHtmlWinParser::GetProduct()
 206 {
 207     wxHtmlContainerCell *top;
 208
 209     CloseContainer();
 210     OpenContainer();
 211
 212     top = m_Container;
 213     while (top->GetParent()) top = top->GetParent();
 214     top->RemoveExtraSpacing(true, true);
 215
 216     return top;
 217 }
 218
 219 wxFSFile *wxHtmlWinParser::OpenURL(wxHtmlURLType type,
 220                                    const wxString& url) const
 221 {
 222     // FIXME - normalize the URL to full path before passing to
 223     //         OnOpeningURL!!
 224     if ( m_Window )
 225     {
 226         wxString myurl(url);
 227         wxHtmlOpeningStatus status;
 228         for (;;)
 229         {
 230             wxString redirect;
 231             status = m_Window->OnOpeningURL(type, myurl, &redirect);
 232             if ( status != wxHTML_REDIRECT )
 233                 break;
 234
 235             myurl = redirect;
 236         }
 237
 238         if ( status == wxHTML_BLOCK )
 239             return NULL;
 240
 241         return GetFS()->OpenFile(myurl);
 242     }
 243
 244     return wxHtmlParser::OpenURL(type, url);
 245 }
 246
 247 void wxHtmlWinParser::AddText(const wxChar* txt)
 248 {
 249     wxHtmlCell *c;
 250     size_t i = 0,
 251            x,
 252            lng = wxStrlen(txt);
 253     register wxChar d;
 254     int templen = 0;
 255     wxChar nbsp = GetEntitiesParser()->GetCharForCode(160 /* nbsp */);
 256
 257     if (lng+1 > m_tmpStrBufSize)
 258     {
 259         delete[] m_tmpStrBuf;
 260         m_tmpStrBuf = new wxChar[lng+1];
 261         m_tmpStrBufSize = lng+1;
 262     }
 263     wxChar *temp = m_tmpStrBuf;
 264
 265     if (m_tmpLastWasSpace)
 266     {
 267         while ((i < lng) &&
 268                ((txt[i] == wxT('\n')) || (txt[i] == wxT('\r')) || (txt[i] == wxT(' ')) ||
 269                 (txt[i] == wxT('\t')))) i++;
 270     }
 271
 272     while (i < lng)
 273     {
 274         x = 0;
 275         d = temp[templen++] = txt[i];
 276         if ((d == wxT('\n')) || (d == wxT('\r')) || (d == wxT(' ')) || (d == wxT('\t')))
 277         {
 278             i++, x++;
 279             while ((i < lng) && ((txt[i] == wxT('\n')) || (txt[i] == wxT('\r')) ||
 280                                  (txt[i] == wxT(' ')) || (txt[i] == wxT('\t')))) i++, x++;
 281         }
 282         else i++;
 283
 284         if (x)
 285         {
 286             temp[templen-1] = wxT(' ');
 287             temp[templen] = 0;
 288             templen = 0;
 289 #if !wxUSE_UNICODE
 290             if (m_EncConv)
 291                 m_EncConv->Convert(temp);
 292 #endif
 293             size_t len = wxStrlen(temp);
 294             for (size_t j = 0; j < len; j++)
 295                 if (temp[j] == nbsp)
 296                     temp[j] = wxT(' ');
 297             c = new wxHtmlWordCell(temp, *(GetDC()));
 298             if (m_UseLink)
 299                 c->SetLink(m_Link);
 300             m_Container->InsertCell(c);
 301             ((wxHtmlWordCell*)c)->SetPreviousWord(m_lastWordCell);
 302             m_lastWordCell = (wxHtmlWordCell*)c;
 303             m_tmpLastWasSpace = TRUE;
 304         }
 305     }
 306
 307     if (templen && (templen > 1 || temp[0] != wxT(' ')))
 308     {
 309         temp[templen] = 0;
 310 #if !wxUSE_UNICODE
 311         if (m_EncConv)
 312             m_EncConv->Convert(temp);
 313 #endif
 314         size_t len = wxStrlen(temp);
 315         for (size_t j = 0; j < len; j++)
 316             if (temp[j] == nbsp)
 317                 temp[j] = wxT(' ');
 318         c = new wxHtmlWordCell(temp, *(GetDC()));
 319         if (m_UseLink)
 320             c->SetLink(m_Link);
 321         m_Container->InsertCell(c);
 322         ((wxHtmlWordCell*)c)->SetPreviousWord(m_lastWordCell);
 323         m_lastWordCell = (wxHtmlWordCell*)c;
 324         m_tmpLastWasSpace = FALSE;
 325     }
 326 }
 327
 328
 329
 330 wxHtmlContainerCell* wxHtmlWinParser::OpenContainer()
 331 {
 332     m_Container = new wxHtmlContainerCell(m_Container);
 333     m_Container->SetAlignHor(m_Align);
 334     m_tmpLastWasSpace = TRUE;
 335         /* to avoid space being first character in paragraph */
 336     return m_Container;
 337 }
 338
 339
 340
 341 wxHtmlContainerCell* wxHtmlWinParser::SetContainer(wxHtmlContainerCell *c)
 342 {
 343     m_tmpLastWasSpace = TRUE;
 344         /* to avoid space being first character in paragraph */
 345     return m_Container = c;
 346 }
 347
 348
 349
 350 wxHtmlContainerCell* wxHtmlWinParser::CloseContainer()
 351 {
 352     m_Container = m_Container->GetParent();
 353     return m_Container;
 354 }
 355
 356
 357 void wxHtmlWinParser::SetFontSize(int s)
 358 {
 359     if (s < 1) s = 1;
 360     else if (s > 7) s = 7;
 361     m_FontSize = s;
 362 }
 363
 364
 365
 366 wxFont* wxHtmlWinParser::CreateCurrentFont()
 367 {
 368     int fb = GetFontBold(),
 369         fi = GetFontItalic(),
 370         fu = GetFontUnderlined(),
 371         ff = GetFontFixed(),
 372         fs = GetFontSize() - 1 /*remap from <1;7> to <0;6>*/ ;
 373
 374     wxString face = ff ? m_FontFaceFixed : m_FontFaceNormal;
 375     wxString *faceptr = &(m_FontsFacesTable[fb][fi][fu][ff][fs]);
 376     wxFont **fontptr = &(m_FontsTable[fb][fi][fu][ff][fs]);
 377 #if !wxUSE_UNICODE
 378     wxFontEncoding *encptr = &(m_FontsEncTable[fb][fi][fu][ff][fs]);
 379 #endif
 380
 381     if (*fontptr != NULL && (*faceptr != face
 382 #if !wxUSE_UNICODE
 383                              || *encptr != m_OutputEnc
 384 #endif
 385                             ))
 386     {
 387         delete *fontptr;
 388         *fontptr = NULL;
 389     }
 390
 391     if (*fontptr == NULL)
 392     {
 393         *faceptr = face;
 394         *fontptr = new wxFont(
 395                        (int) (m_FontsSizes[fs] * m_PixelScale),
 396                        ff ? wxMODERN : wxSWISS,
 397                        fi ? wxITALIC : wxNORMAL,
 398                        fb ? wxBOLD : wxNORMAL,
 399                        fu ? TRUE : FALSE, face
 400 #if wxUSE_UNICODE
 401                        );
 402 #else
 403                        , m_OutputEnc);
 404         *encptr = m_OutputEnc;
 405 #endif
 406     }
 407     m_DC->SetFont(**fontptr);
 408     return (*fontptr);
 409 }
 410
 411
 412
 413 void wxHtmlWinParser::SetLink(const wxHtmlLinkInfo& link)
 414 {
 415     m_Link = link;
 416     m_UseLink = (link.GetHref() != wxEmptyString);
 417 }
 418
 419
 420 void wxHtmlWinParser::SetFontFace(const wxString& face)
 421 {
 422     if (GetFontFixed()) m_FontFaceFixed = face;
 423     else m_FontFaceNormal = face;
 424
 425 #if !wxUSE_UNICODE
 426     if (m_InputEnc != wxFONTENCODING_DEFAULT)
 427         SetInputEncoding(m_InputEnc);
 428 #endif
 429 }
 430
 431
 432
 433 #if !wxUSE_UNICODE
 434 void wxHtmlWinParser::SetInputEncoding(wxFontEncoding enc)
 435 {
 436     m_InputEnc = m_OutputEnc = wxFONTENCODING_DEFAULT;
 437     if (m_EncConv)
 438     {
 439         delete m_EncConv;
 440         m_EncConv = NULL;
 441     }
 442
 443     if (enc == wxFONTENCODING_DEFAULT) return;
 444
 445     wxFontEncoding altfix, altnorm;
 446     bool availfix, availnorm;
 447
 448     // exact match?
 449     availnorm = wxFontMapper::Get()->IsEncodingAvailable(enc, m_FontFaceNormal);
 450     availfix = wxFontMapper::Get()->IsEncodingAvailable(enc, m_FontFaceFixed);
 451     if (availnorm && availfix)
 452         m_OutputEnc = enc;
 453
 454     // alternatives?
 455     else if (wxFontMapper::Get()->GetAltForEncoding(enc, &altnorm, m_FontFaceNormal, FALSE) &&
 456              wxFontMapper::Get()->GetAltForEncoding(enc, &altfix, m_FontFaceFixed, FALSE) &&
 457              altnorm == altfix)
 458         m_OutputEnc = altnorm;
 459
 460     // at least normal face?
 461     else if (availnorm)
 462         m_OutputEnc = enc;
 463     else if (wxFontMapper::Get()->GetAltForEncoding(enc, &altnorm, m_FontFaceNormal, FALSE))
 464         m_OutputEnc = altnorm;
 465
 466     // okay, let convert to ISO_8859-1, available always
 467     else
 468         m_OutputEnc = wxFONTENCODING_DEFAULT;
 469
 470     m_InputEnc = enc;
 471     if (m_OutputEnc == wxFONTENCODING_DEFAULT)
 472         GetEntitiesParser()->SetEncoding(wxFONTENCODING_SYSTEM);
 473     else
 474         GetEntitiesParser()->SetEncoding(m_OutputEnc);
 475
 476     if (m_InputEnc == m_OutputEnc) return;
 477
 478     m_EncConv = new wxEncodingConverter();
 479     if (!m_EncConv->Init(m_InputEnc,
 480                            (m_OutputEnc == wxFONTENCODING_DEFAULT) ?
 481                                       wxFONTENCODING_ISO8859_1 : m_OutputEnc,
 482                            wxCONVERT_SUBSTITUTE))
 483     { // total failture :-(
 484         wxLogError(_("Failed to display HTML document in %s encoding"),
 485                    wxFontMapper::GetEncodingName(enc).c_str());
 486         m_InputEnc = m_OutputEnc = wxFONTENCODING_DEFAULT;
 487         delete m_EncConv;
 488         m_EncConv = NULL;
 489     }
 490 }
 491 #endif
 492
 493
 494
 495
 496 //-----------------------------------------------------------------------------
 497 // wxHtmlWinTagHandler
 498 //-----------------------------------------------------------------------------
 499
 500 IMPLEMENT_ABSTRACT_CLASS(wxHtmlWinTagHandler, wxHtmlTagHandler)
 501
 502 //-----------------------------------------------------------------------------
 503 // wxHtmlTagsModule
 504 //-----------------------------------------------------------------------------
 505
 506 // NB: This is *NOT* winpars.cpp's initialization and shutdown code!!
 507 //     This module is an ancestor for tag handlers modules defined
 508 //     in m_*.cpp files with TAGS_MODULE_BEGIN...TAGS_MODULE_END construct.
 509 //
 510 //     Do not add any winpars.cpp shutdown or initialization code to it,
 511 //     create a new module instead!
 512
 513 IMPLEMENT_DYNAMIC_CLASS(wxHtmlTagsModule, wxModule)
 514
 515 bool wxHtmlTagsModule::OnInit()
 516 {
 517     wxHtmlWinParser::AddModule(this);
 518     return TRUE;
 519 }
 520
 521 void wxHtmlTagsModule::OnExit()
 522 {
 523     wxHtmlWinParser::RemoveModule(this);
 524 }
 525
 526 #endif
 527