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 #include "wx/settings.h"
  35
  36
  37 //-----------------------------------------------------------------------------
  38 // wxHtmlWinParser
  39 //-----------------------------------------------------------------------------
  40
  41
  42 wxList wxHtmlWinParser::m_Modules;
  43
  44 wxHtmlWinParser::wxHtmlWinParser(wxHtmlWindow *wnd) : wxHtmlParser()
  45 {
  46     m_tmpStrBuf = NULL;
  47     m_tmpStrBufSize = 0;
  48     m_Window = wnd;
  49     m_Container = NULL;
  50     m_DC = NULL;
  51     m_CharHeight = m_CharWidth = 0;
  52     m_UseLink = FALSE;
  53 #if !wxUSE_UNICODE
  54     m_EncConv = NULL;
  55     m_InputEnc = wxFONTENCODING_ISO8859_1;
  56     m_OutputEnc = wxFONTENCODING_DEFAULT;
  57 #endif
  58     m_lastWordCell = NULL;
  59
  60     {
  61         int i, j, k, l, m;
  62         for (i = 0; i < 2; i++)
  63             for (j = 0; j < 2; j++)
  64                 for (k = 0; k < 2; k++)
  65                     for (l = 0; l < 2; l++)
  66                         for (m = 0; m < 7; m++)
  67                         {
  68                             m_FontsTable[i][j][k][l][m] = NULL;
  69                             m_FontsFacesTable[i][j][k][l][m] = wxEmptyString;
  70 #if !wxUSE_UNICODE
  71                             m_FontsEncTable[i][j][k][l][m] = wxFONTENCODING_DEFAULT;
  72 #endif
  73                         }
  74
  75         SetFonts(wxEmptyString, wxEmptyString, NULL);
  76     }
  77
  78     // fill in wxHtmlParser's tables:
  79     wxList::compatibility_iterator node = m_Modules.GetFirst();
  80     while (node)
  81     {
  82         wxHtmlTagsModule *mod = (wxHtmlTagsModule*) node->GetData();
  83         mod->FillHandlersTable(this);
  84         node = node->GetNext();
  85     }
  86 }
  87
  88 wxHtmlWinParser::~wxHtmlWinParser()
  89 {
  90     int i, j, k, l, m;
  91
  92     for (i = 0; i < 2; i++)
  93         for (j = 0; j < 2; j++)
  94             for (k = 0; k < 2; k++)
  95                 for (l = 0; l < 2; l++)
  96                     for (m = 0; m < 7; m++)
  97                     {
  98                         if (m_FontsTable[i][j][k][l][m] != NULL)
  99                             delete m_FontsTable[i][j][k][l][m];
 100                     }
 101 #if !wxUSE_UNICODE
 102     delete m_EncConv;
 103 #endif
 104     delete[] m_tmpStrBuf;
 105 }
 106
 107 void wxHtmlWinParser::AddModule(wxHtmlTagsModule *module)
 108 {
 109     m_Modules.Append(module);
 110 }
 111
 112 void wxHtmlWinParser::RemoveModule(wxHtmlTagsModule *module)
 113 {
 114     m_Modules.DeleteObject(module);
 115 }
 116
 117 void wxHtmlWinParser::SetFonts(wxString normal_face, wxString fixed_face,
 118                                const int *sizes)
 119 {
 120     static int default_sizes[7] =
 121         {
 122             wxHTML_FONT_SIZE_1,
 123                         wxHTML_FONT_SIZE_2,
 124                         wxHTML_FONT_SIZE_3,
 125                         wxHTML_FONT_SIZE_4,
 126                         wxHTML_FONT_SIZE_5,
 127                         wxHTML_FONT_SIZE_6,
 128                         wxHTML_FONT_SIZE_7
 129         };
 130
 131     if (sizes == NULL) sizes = default_sizes;
 132
 133     int i, j, k, l, m;
 134
 135     for (i = 0; i < 7; i++) m_FontsSizes[i] = sizes[i];
 136     m_FontFaceFixed = fixed_face;
 137     m_FontFaceNormal = normal_face;
 138
 139 #if !wxUSE_UNICODE
 140     SetInputEncoding(m_InputEnc);
 141 #endif
 142
 143     for (i = 0; i < 2; i++)
 144         for (j = 0; j < 2; j++)
 145             for (k = 0; k < 2; k++)
 146                 for (l = 0; l < 2; l++)
 147                     for (m = 0; m < 7; m++) {
 148                         if (m_FontsTable[i][j][k][l][m] != NULL)
 149                         {
 150                             delete m_FontsTable[i][j][k][l][m];
 151                             m_FontsTable[i][j][k][l][m] = NULL;
 152                         }
 153                     }
 154 }
 155
 156 void wxHtmlWinParser::InitParser(const wxString& source)
 157 {
 158     wxHtmlParser::InitParser(source);
 159     wxASSERT_MSG(m_DC != NULL, wxT("no DC assigned to wxHtmlWinParser!!"));
 160
 161     m_FontBold = m_FontItalic = m_FontUnderlined = m_FontFixed = FALSE;
 162     m_FontSize = 3; //default one
 163     CreateCurrentFont();           // we're selecting default font into
 164     m_DC->GetTextExtent( wxT("H"), &m_CharWidth, &m_CharHeight);
 165                 /* NOTE : we're not using GetCharWidth/Height() because
 166                    of differences under X and win
 167                  */
 168
 169     m_UseLink = FALSE;
 170     m_Link = wxHtmlLinkInfo( wxT(""), wxT("") );
 171     m_LinkColor.Set(0, 0, 0xFF);
 172     m_ActualColor.Set(0, 0, 0);
 173     m_Align = wxHTML_ALIGN_LEFT;
 174     m_tmpLastWasSpace = FALSE;
 175     m_lastWordCell = NULL;
 176
 177     OpenContainer();
 178     OpenContainer();
 179
 180 #if !wxUSE_UNICODE
 181     wxString charset = ExtractCharsetInformation(source);
 182     if (!charset.empty())
 183     {
 184         wxFontEncoding enc = wxFontMapper::Get()->CharsetToEncoding(charset);
 185         if (enc != wxFONTENCODING_SYSTEM)
 186           SetInputEncoding(enc);
 187     }
 188 #endif
 189
 190     m_Container->InsertCell(new wxHtmlColourCell(m_ActualColor));
 191     m_Container->InsertCell(
 192             new wxHtmlColourCell(GetWindow() ?
 193                                      GetWindow()->GetBackgroundColour() :
 194                                      wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW),
 195                                  wxHTML_CLR_BACKGROUND));
 196     m_Container->InsertCell(new wxHtmlFontCell(CreateCurrentFont()));
 197 }
 198
 199 void wxHtmlWinParser::DoneParser()
 200 {
 201     m_Container = NULL;
 202 #if !wxUSE_UNICODE
 203     SetInputEncoding(wxFONTENCODING_ISO8859_1); // for next call
 204 #endif
 205     wxHtmlParser::DoneParser();
 206 }
 207
 208 wxObject* wxHtmlWinParser::GetProduct()
 209 {
 210     wxHtmlContainerCell *top;
 211
 212     CloseContainer();
 213     OpenContainer();
 214
 215     top = m_Container;
 216     while (top->GetParent()) top = top->GetParent();
 217     top->RemoveExtraSpacing(true, true);
 218
 219     return top;
 220 }
 221
 222 wxFSFile *wxHtmlWinParser::OpenURL(wxHtmlURLType type,
 223                                    const wxString& url) const
 224 {
 225     // FIXME - normalize the URL to full path before passing to
 226     //         OnOpeningURL!!
 227     if ( m_Window )
 228     {
 229         wxString myurl(url);
 230         wxHtmlOpeningStatus status;
 231         for (;;)
 232         {
 233             wxString redirect;
 234             status = m_Window->OnOpeningURL(type, myurl, &redirect);
 235             if ( status != wxHTML_REDIRECT )
 236                 break;
 237
 238             myurl = redirect;
 239         }
 240
 241         if ( status == wxHTML_BLOCK )
 242             return NULL;
 243
 244         return GetFS()->OpenFile(myurl);
 245     }
 246
 247     return wxHtmlParser::OpenURL(type, url);
 248 }
 249
 250 void wxHtmlWinParser::AddText(const wxChar* txt)
 251 {
 252     wxHtmlCell *c;
 253     size_t i = 0,
 254            x,
 255            lng = wxStrlen(txt);
 256     register wxChar d;
 257     int templen = 0;
 258     wxChar nbsp = GetEntitiesParser()->GetCharForCode(160 /* nbsp */);
 259
 260     if (lng+1 > m_tmpStrBufSize)
 261     {
 262         delete[] m_tmpStrBuf;
 263         m_tmpStrBuf = new wxChar[lng+1];
 264         m_tmpStrBufSize = lng+1;
 265     }
 266     wxChar *temp = m_tmpStrBuf;
 267
 268     if (m_tmpLastWasSpace)
 269     {
 270         while ((i < lng) &&
 271                ((txt[i] == wxT('\n')) || (txt[i] == wxT('\r')) || (txt[i] == wxT(' ')) ||
 272                 (txt[i] == wxT('\t')))) i++;
 273     }
 274
 275     while (i < lng)
 276     {
 277         x = 0;
 278         d = temp[templen++] = txt[i];
 279         if ((d == wxT('\n')) || (d == wxT('\r')) || (d == wxT(' ')) || (d == wxT('\t')))
 280         {
 281             i++, x++;
 282             while ((i < lng) && ((txt[i] == wxT('\n')) || (txt[i] == wxT('\r')) ||
 283                                  (txt[i] == wxT(' ')) || (txt[i] == wxT('\t')))) i++, x++;
 284         }
 285         else i++;
 286
 287         if (x)
 288         {
 289             temp[templen-1] = wxT(' ');
 290             temp[templen] = 0;
 291             templen = 0;
 292 #if !wxUSE_UNICODE
 293             if (m_EncConv)
 294                 m_EncConv->Convert(temp);
 295 #endif
 296             size_t len = wxStrlen(temp);
 297             for (size_t j = 0; j < len; j++)
 298                 if (temp[j] == nbsp)
 299                     temp[j] = wxT(' ');
 300             c = new wxHtmlWordCell(temp, *(GetDC()));
 301             if (m_UseLink)
 302                 c->SetLink(m_Link);
 303             m_Container->InsertCell(c);
 304             ((wxHtmlWordCell*)c)->SetPreviousWord(m_lastWordCell);
 305             m_lastWordCell = (wxHtmlWordCell*)c;
 306             m_tmpLastWasSpace = TRUE;
 307         }
 308     }
 309
 310     if (templen && (templen > 1 || temp[0] != wxT(' ')))
 311     {
 312         temp[templen] = 0;
 313 #if !wxUSE_UNICODE
 314         if (m_EncConv)
 315             m_EncConv->Convert(temp);
 316 #endif
 317         size_t len = wxStrlen(temp);
 318         for (size_t j = 0; j < len; j++)
 319             if (temp[j] == nbsp)
 320                 temp[j] = wxT(' ');
 321         c = new wxHtmlWordCell(temp, *(GetDC()));
 322         if (m_UseLink)
 323             c->SetLink(m_Link);
 324         m_Container->InsertCell(c);
 325         ((wxHtmlWordCell*)c)->SetPreviousWord(m_lastWordCell);
 326         m_lastWordCell = (wxHtmlWordCell*)c;
 327         m_tmpLastWasSpace = FALSE;
 328     }
 329 }
 330
 331
 332
 333 wxHtmlContainerCell* wxHtmlWinParser::OpenContainer()
 334 {
 335     m_Container = new wxHtmlContainerCell(m_Container);
 336     m_Container->SetAlignHor(m_Align);
 337     m_tmpLastWasSpace = TRUE;
 338         /* to avoid space being first character in paragraph */
 339     return m_Container;
 340 }
 341
 342
 343
 344 wxHtmlContainerCell* wxHtmlWinParser::SetContainer(wxHtmlContainerCell *c)
 345 {
 346     m_tmpLastWasSpace = TRUE;
 347         /* to avoid space being first character in paragraph */
 348     return m_Container = c;
 349 }
 350
 351
 352
 353 wxHtmlContainerCell* wxHtmlWinParser::CloseContainer()
 354 {
 355     m_Container = m_Container->GetParent();
 356     return m_Container;
 357 }
 358
 359
 360 void wxHtmlWinParser::SetFontSize(int s)
 361 {
 362     if (s < 1) s = 1;
 363     else if (s > 7) s = 7;
 364     m_FontSize = s;
 365 }
 366
 367
 368
 369 wxFont* wxHtmlWinParser::CreateCurrentFont()
 370 {
 371     int fb = GetFontBold(),
 372         fi = GetFontItalic(),
 373         fu = GetFontUnderlined(),
 374         ff = GetFontFixed(),
 375         fs = GetFontSize() - 1 /*remap from <1;7> to <0;6>*/ ;
 376
 377     wxString face = ff ? m_FontFaceFixed : m_FontFaceNormal;
 378     wxString *faceptr = &(m_FontsFacesTable[fb][fi][fu][ff][fs]);
 379     wxFont **fontptr = &(m_FontsTable[fb][fi][fu][ff][fs]);
 380 #if !wxUSE_UNICODE
 381     wxFontEncoding *encptr = &(m_FontsEncTable[fb][fi][fu][ff][fs]);
 382 #endif
 383
 384     if (*fontptr != NULL && (*faceptr != face
 385 #if !wxUSE_UNICODE
 386                              || *encptr != m_OutputEnc
 387 #endif
 388                             ))
 389     {
 390         delete *fontptr;
 391         *fontptr = NULL;
 392     }
 393
 394     if (*fontptr == NULL)
 395     {
 396         *faceptr = face;
 397         *fontptr = new wxFont(
 398                        (int) (m_FontsSizes[fs] * m_PixelScale),
 399                        ff ? wxMODERN : wxSWISS,
 400                        fi ? wxITALIC : wxNORMAL,
 401                        fb ? wxBOLD : wxNORMAL,
 402                        fu ? TRUE : FALSE, face
 403 #if wxUSE_UNICODE
 404                        );
 405 #else
 406                        , m_OutputEnc);
 407         *encptr = m_OutputEnc;
 408 #endif
 409     }
 410     m_DC->SetFont(**fontptr);
 411     return (*fontptr);
 412 }
 413
 414
 415
 416 void wxHtmlWinParser::SetLink(const wxHtmlLinkInfo& link)
 417 {
 418     m_Link = link;
 419     m_UseLink = (link.GetHref() != wxEmptyString);
 420 }
 421
 422
 423 void wxHtmlWinParser::SetFontFace(const wxString& face)
 424 {
 425     if (GetFontFixed()) m_FontFaceFixed = face;
 426     else m_FontFaceNormal = face;
 427
 428 #if !wxUSE_UNICODE
 429     if (m_InputEnc != wxFONTENCODING_DEFAULT)
 430         SetInputEncoding(m_InputEnc);
 431 #endif
 432 }
 433
 434
 435
 436 #if !wxUSE_UNICODE
 437 void wxHtmlWinParser::SetInputEncoding(wxFontEncoding enc)
 438 {
 439     m_InputEnc = m_OutputEnc = wxFONTENCODING_DEFAULT;
 440     if (m_EncConv)
 441     {
 442         delete m_EncConv;
 443         m_EncConv = NULL;
 444     }
 445
 446     if (enc == wxFONTENCODING_DEFAULT) return;
 447
 448     wxFontEncoding altfix, altnorm;
 449     bool availfix, availnorm;
 450
 451     // exact match?
 452     availnorm = wxFontMapper::Get()->IsEncodingAvailable(enc, m_FontFaceNormal);
 453     availfix = wxFontMapper::Get()->IsEncodingAvailable(enc, m_FontFaceFixed);
 454     if (availnorm && availfix)
 455         m_OutputEnc = enc;
 456
 457     // alternatives?
 458     else if (wxFontMapper::Get()->GetAltForEncoding(enc, &altnorm, m_FontFaceNormal, FALSE) &&
 459              wxFontMapper::Get()->GetAltForEncoding(enc, &altfix, m_FontFaceFixed, FALSE) &&
 460              altnorm == altfix)
 461         m_OutputEnc = altnorm;
 462
 463     // at least normal face?
 464     else if (availnorm)
 465         m_OutputEnc = enc;
 466     else if (wxFontMapper::Get()->GetAltForEncoding(enc, &altnorm, m_FontFaceNormal, FALSE))
 467         m_OutputEnc = altnorm;
 468
 469     // okay, let convert to ISO_8859-1, available always
 470     else
 471         m_OutputEnc = wxFONTENCODING_DEFAULT;
 472
 473     m_InputEnc = enc;
 474     if (m_OutputEnc == wxFONTENCODING_DEFAULT)
 475         GetEntitiesParser()->SetEncoding(wxFONTENCODING_SYSTEM);
 476     else
 477         GetEntitiesParser()->SetEncoding(m_OutputEnc);
 478
 479     if (m_InputEnc == m_OutputEnc) return;
 480
 481     m_EncConv = new wxEncodingConverter();
 482     if (!m_EncConv->Init(m_InputEnc,
 483                            (m_OutputEnc == wxFONTENCODING_DEFAULT) ?
 484                                       wxFONTENCODING_ISO8859_1 : m_OutputEnc,
 485                            wxCONVERT_SUBSTITUTE))
 486     { // total failture :-(
 487         wxLogError(_("Failed to display HTML document in %s encoding"),
 488                    wxFontMapper::GetEncodingName(enc).c_str());
 489         m_InputEnc = m_OutputEnc = wxFONTENCODING_DEFAULT;
 490         delete m_EncConv;
 491         m_EncConv = NULL;
 492     }
 493 }
 494 #endif
 495
 496
 497
 498
 499 //-----------------------------------------------------------------------------
 500 // wxHtmlWinTagHandler
 501 //-----------------------------------------------------------------------------
 502
 503 IMPLEMENT_ABSTRACT_CLASS(wxHtmlWinTagHandler, wxHtmlTagHandler)
 504
 505 //-----------------------------------------------------------------------------
 506 // wxHtmlTagsModule
 507 //-----------------------------------------------------------------------------
 508
 509 // NB: This is *NOT* winpars.cpp's initialization and shutdown code!!
 510 //     This module is an ancestor for tag handlers modules defined
 511 //     in m_*.cpp files with TAGS_MODULE_BEGIN...TAGS_MODULE_END construct.
 512 //
 513 //     Do not add any winpars.cpp shutdown or initialization code to it,
 514 //     create a new module instead!
 515
 516 IMPLEMENT_DYNAMIC_CLASS(wxHtmlTagsModule, wxModule)
 517
 518 bool wxHtmlTagsModule::OnInit()
 519 {
 520     wxHtmlWinParser::AddModule(this);
 521     return TRUE;
 522 }
 523
 524 void wxHtmlTagsModule::OnExit()
 525 {
 526     wxHtmlWinParser::RemoveModule(this);
 527 }
 528
 529 #endif
 530