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 #ifdef __GNUG__
  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(new wxHtmlFontCell(CreateCurrentFont()));
 191 }
 192
 193 void wxHtmlWinParser::DoneParser()
 194 {
 195     m_Container = NULL;
 196 #if !wxUSE_UNICODE
 197     SetInputEncoding(wxFONTENCODING_ISO8859_1); // for next call
 198 #endif
 199     wxHtmlParser::DoneParser();
 200 }
 201
 202 wxObject* wxHtmlWinParser::GetProduct()
 203 {
 204     wxHtmlContainerCell *top;
 205
 206     CloseContainer();
 207     OpenContainer();
 208
 209     top = m_Container;
 210     while (top->GetParent()) top = top->GetParent();
 211     top->RemoveExtraSpacing(true, true);
 212
 213     return top;
 214 }
 215
 216 wxFSFile *wxHtmlWinParser::OpenURL(wxHtmlURLType type,
 217                                    const wxString& url) const
 218 {
 219     // FIXME - normalize the URL to full path before passing to
 220     //         OnOpeningURL!!
 221     if ( m_Window )
 222     {
 223         wxString myurl(url);
 224         wxHtmlOpeningStatus status;
 225         for (;;)
 226         {
 227             wxString redirect;
 228             status = m_Window->OnOpeningURL(type, myurl, &redirect);
 229             if ( status != wxHTML_REDIRECT )
 230                 break;
 231
 232             myurl = redirect;
 233         }
 234
 235         if ( status == wxHTML_BLOCK )
 236             return NULL;
 237
 238         return GetFS()->OpenFile(myurl);
 239     }
 240
 241     return wxHtmlParser::OpenURL(type, url);
 242 }
 243
 244 void wxHtmlWinParser::AddText(const wxChar* txt)
 245 {
 246     wxHtmlCell *c;
 247     size_t i = 0,
 248            x,
 249            lng = wxStrlen(txt);
 250     register wxChar d;
 251     int templen = 0;
 252     wxChar nbsp = GetEntitiesParser()->GetCharForCode(160 /* nbsp */);
 253
 254     if (lng+1 > m_tmpStrBufSize)
 255     {
 256         delete[] m_tmpStrBuf;
 257         m_tmpStrBuf = new wxChar[lng+1];
 258         m_tmpStrBufSize = lng+1;
 259     }
 260     wxChar *temp = m_tmpStrBuf;
 261
 262     if (m_tmpLastWasSpace)
 263     {
 264         while ((i < lng) &&
 265                ((txt[i] == wxT('\n')) || (txt[i] == wxT('\r')) || (txt[i] == wxT(' ')) ||
 266                 (txt[i] == wxT('\t')))) i++;
 267     }
 268
 269     while (i < lng)
 270     {
 271         x = 0;
 272         d = temp[templen++] = txt[i];
 273         if ((d == wxT('\n')) || (d == wxT('\r')) || (d == wxT(' ')) || (d == wxT('\t')))
 274         {
 275             i++, x++;
 276             while ((i < lng) && ((txt[i] == wxT('\n')) || (txt[i] == wxT('\r')) ||
 277                                  (txt[i] == wxT(' ')) || (txt[i] == wxT('\t')))) i++, x++;
 278         }
 279         else i++;
 280
 281         if (x)
 282         {
 283             temp[templen-1] = wxT(' ');
 284             temp[templen] = 0;
 285             templen = 0;
 286 #if !wxUSE_UNICODE
 287             if (m_EncConv)
 288                 m_EncConv->Convert(temp);
 289 #endif
 290             size_t len = wxStrlen(temp);
 291             for (size_t j = 0; j < len; j++)
 292                 if (temp[j] == nbsp)
 293                     temp[j] = wxT(' ');
 294             c = new wxHtmlWordCell(temp, *(GetDC()));
 295             if (m_UseLink)
 296                 c->SetLink(m_Link);
 297             m_Container->InsertCell(c);
 298             ((wxHtmlWordCell*)c)->SetPreviousWord(m_lastWordCell);
 299             m_lastWordCell = (wxHtmlWordCell*)c;
 300             m_tmpLastWasSpace = TRUE;
 301         }
 302     }
 303
 304     if (templen && (templen > 1 || temp[0] != wxT(' ')))
 305     {
 306         temp[templen] = 0;
 307 #if !wxUSE_UNICODE
 308         if (m_EncConv)
 309             m_EncConv->Convert(temp);
 310 #endif
 311         size_t len = wxStrlen(temp);
 312         for (size_t j = 0; j < len; j++)
 313             if (temp[j] == nbsp)
 314                 temp[j] = wxT(' ');
 315         c = new wxHtmlWordCell(temp, *(GetDC()));
 316         if (m_UseLink)
 317             c->SetLink(m_Link);
 318         m_Container->InsertCell(c);
 319         ((wxHtmlWordCell*)c)->SetPreviousWord(m_lastWordCell);
 320         m_lastWordCell = (wxHtmlWordCell*)c;
 321         m_tmpLastWasSpace = FALSE;
 322     }
 323 }
 324
 325
 326
 327 wxHtmlContainerCell* wxHtmlWinParser::OpenContainer()
 328 {
 329     m_Container = new wxHtmlContainerCell(m_Container);
 330     m_Container->SetAlignHor(m_Align);
 331     m_tmpLastWasSpace = TRUE;
 332         /* to avoid space being first character in paragraph */
 333     return m_Container;
 334 }
 335
 336
 337
 338 wxHtmlContainerCell* wxHtmlWinParser::SetContainer(wxHtmlContainerCell *c)
 339 {
 340     m_tmpLastWasSpace = TRUE;
 341         /* to avoid space being first character in paragraph */
 342     return m_Container = c;
 343 }
 344
 345
 346
 347 wxHtmlContainerCell* wxHtmlWinParser::CloseContainer()
 348 {
 349     m_Container = m_Container->GetParent();
 350     return m_Container;
 351 }
 352
 353
 354 void wxHtmlWinParser::SetFontSize(int s)
 355 {
 356     if (s < 1) s = 1;
 357     else if (s > 7) s = 7;
 358     m_FontSize = s;
 359 }
 360
 361
 362
 363 wxFont* wxHtmlWinParser::CreateCurrentFont()
 364 {
 365     int fb = GetFontBold(),
 366         fi = GetFontItalic(),
 367         fu = GetFontUnderlined(),
 368         ff = GetFontFixed(),
 369         fs = GetFontSize() - 1 /*remap from <1;7> to <0;6>*/ ;
 370
 371     wxString face = ff ? m_FontFaceFixed : m_FontFaceNormal;
 372     wxString *faceptr = &(m_FontsFacesTable[fb][fi][fu][ff][fs]);
 373     wxFont **fontptr = &(m_FontsTable[fb][fi][fu][ff][fs]);
 374 #if !wxUSE_UNICODE
 375     wxFontEncoding *encptr = &(m_FontsEncTable[fb][fi][fu][ff][fs]);
 376 #endif
 377
 378     if (*fontptr != NULL && (*faceptr != face
 379 #if !wxUSE_UNICODE
 380                              || *encptr != m_OutputEnc
 381 #endif
 382                             ))
 383     {
 384         delete *fontptr;
 385         *fontptr = NULL;
 386     }
 387
 388     if (*fontptr == NULL)
 389     {
 390         *faceptr = face;
 391         *fontptr = new wxFont(
 392                        (int) (m_FontsSizes[fs] * m_PixelScale),
 393                        ff ? wxMODERN : wxSWISS,
 394                        fi ? wxITALIC : wxNORMAL,
 395                        fb ? wxBOLD : wxNORMAL,
 396                        fu ? TRUE : FALSE, face
 397 #if wxUSE_UNICODE
 398                        );
 399 #else
 400                        , m_OutputEnc);
 401         *encptr = m_OutputEnc;
 402 #endif
 403     }
 404     m_DC->SetFont(**fontptr);
 405     return (*fontptr);
 406 }
 407
 408
 409
 410 void wxHtmlWinParser::SetLink(const wxHtmlLinkInfo& link)
 411 {
 412     m_Link = link;
 413     m_UseLink = (link.GetHref() != wxEmptyString);
 414 }
 415
 416
 417 void wxHtmlWinParser::SetFontFace(const wxString& face)
 418 {
 419     if (GetFontFixed()) m_FontFaceFixed = face;
 420     else m_FontFaceNormal = face;
 421
 422 #if !wxUSE_UNICODE
 423     if (m_InputEnc != wxFONTENCODING_DEFAULT)
 424         SetInputEncoding(m_InputEnc);
 425 #endif
 426 }
 427
 428
 429
 430 #if !wxUSE_UNICODE
 431 void wxHtmlWinParser::SetInputEncoding(wxFontEncoding enc)
 432 {
 433     m_InputEnc = m_OutputEnc = wxFONTENCODING_DEFAULT;
 434     if (m_EncConv)
 435     {
 436         delete m_EncConv;
 437         m_EncConv = NULL;
 438     }
 439
 440     if (enc == wxFONTENCODING_DEFAULT) return;
 441
 442     wxFontEncoding altfix, altnorm;
 443     bool availfix, availnorm;
 444
 445     // exact match?
 446     availnorm = wxFontMapper::Get()->IsEncodingAvailable(enc, m_FontFaceNormal);
 447     availfix = wxFontMapper::Get()->IsEncodingAvailable(enc, m_FontFaceFixed);
 448     if (availnorm && availfix)
 449         m_OutputEnc = enc;
 450
 451     // alternatives?
 452     else if (wxFontMapper::Get()->GetAltForEncoding(enc, &altnorm, m_FontFaceNormal, FALSE) &&
 453              wxFontMapper::Get()->GetAltForEncoding(enc, &altfix, m_FontFaceFixed, FALSE) &&
 454              altnorm == altfix)
 455         m_OutputEnc = altnorm;
 456
 457     // at least normal face?
 458     else if (availnorm)
 459         m_OutputEnc = enc;
 460     else if (wxFontMapper::Get()->GetAltForEncoding(enc, &altnorm, m_FontFaceNormal, FALSE))
 461         m_OutputEnc = altnorm;
 462
 463     // okay, let convert to ISO_8859-1, available always
 464     else
 465         m_OutputEnc = wxFONTENCODING_DEFAULT;
 466
 467     m_InputEnc = enc;
 468     if (m_OutputEnc == wxFONTENCODING_DEFAULT)
 469         GetEntitiesParser()->SetEncoding(wxFONTENCODING_SYSTEM);
 470     else
 471         GetEntitiesParser()->SetEncoding(m_OutputEnc);
 472
 473     if (m_InputEnc == m_OutputEnc) return;
 474
 475     m_EncConv = new wxEncodingConverter();
 476     if (!m_EncConv->Init(m_InputEnc,
 477                            (m_OutputEnc == wxFONTENCODING_DEFAULT) ?
 478                                       wxFONTENCODING_ISO8859_1 : m_OutputEnc,
 479                            wxCONVERT_SUBSTITUTE))
 480     { // total failture :-(
 481         wxLogError(_("Failed to display HTML document in %s encoding"),
 482                    wxFontMapper::GetEncodingName(enc).c_str());
 483         m_InputEnc = m_OutputEnc = wxFONTENCODING_DEFAULT;
 484         delete m_EncConv;
 485         m_EncConv = NULL;
 486     }
 487 }
 488 #endif
 489
 490
 491
 492
 493 //-----------------------------------------------------------------------------
 494 // wxHtmlWinTagHandler
 495 //-----------------------------------------------------------------------------
 496
 497 IMPLEMENT_ABSTRACT_CLASS(wxHtmlWinTagHandler, wxHtmlTagHandler)
 498
 499 //-----------------------------------------------------------------------------
 500 // wxHtmlTagsModule
 501 //-----------------------------------------------------------------------------
 502
 503 // NB: This is *NOT* winpars.cpp's initialization and shutdown code!!
 504 //     This module is an ancestor for tag handlers modules defined
 505 //     in m_*.cpp files with TAGS_MODULE_BEGIN...TAGS_MODULE_END construct.
 506 //
 507 //     Do not add any winpars.cpp shutdown or initialization code to it,
 508 //     create a new module instead!
 509
 510 IMPLEMENT_DYNAMIC_CLASS(wxHtmlTagsModule, wxModule)
 511
 512 bool wxHtmlTagsModule::OnInit()
 513 {
 514     wxHtmlWinParser::AddModule(this);
 515     return TRUE;
 516 }
 517
 518 void wxHtmlTagsModule::OnExit()
 519 {
 520     wxHtmlWinParser::RemoveModule(this);
 521 }
 522
 523 #endif
 524