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 #include "wx/wxprec.h"
  11
  12 #include "wx/defs.h"
  13 #if wxUSE_HTML && wxUSE_STREAMS
  14
  15 #ifdef __BORLANDC__
  16 #pragma hdrstop
  17 #endif
  18
  19 #ifndef WXPRECOMP
  20     #include "wx/intl.h"
  21     #include "wx/dc.h"
  22 #endif
  23
  24 #include "wx/html/htmldefs.h"
  25 #include "wx/html/winpars.h"
  26 #include "wx/html/htmlwin.h"
  27 #include "wx/fontmap.h"
  28 #include "wx/log.h"
  29 #include "wx/settings.h"
  30 #include "wx/uri.h"
  31
  32
  33 //-----------------------------------------------------------------------------
  34 // wxHtmlWinParser
  35 //-----------------------------------------------------------------------------
  36
  37 IMPLEMENT_ABSTRACT_CLASS(wxHtmlWinParser, wxHtmlParser)
  38
  39 wxList wxHtmlWinParser::m_Modules;
  40
  41 wxHtmlWinParser::wxHtmlWinParser(wxHtmlWindow *wnd) : wxHtmlParser()
  42 {
  43     m_tmpStrBuf = NULL;
  44     m_tmpStrBufSize = 0;
  45     m_Window = wnd;
  46     m_Container = NULL;
  47     m_DC = NULL;
  48     m_CharHeight = m_CharWidth = 0;
  49     m_UseLink = false;
  50 #if !wxUSE_UNICODE
  51     m_EncConv = NULL;
  52     m_InputEnc = wxFONTENCODING_ISO8859_1;
  53     m_OutputEnc = wxFONTENCODING_DEFAULT;
  54 #endif
  55     m_lastWordCell = NULL;
  56
  57     {
  58         int i, j, k, l, m;
  59         for (i = 0; i < 2; i++)
  60             for (j = 0; j < 2; j++)
  61                 for (k = 0; k < 2; k++)
  62                     for (l = 0; l < 2; l++)
  63                         for (m = 0; m < 7; m++)
  64                         {
  65                             m_FontsTable[i][j][k][l][m] = NULL;
  66                             m_FontsFacesTable[i][j][k][l][m] = wxEmptyString;
  67 #if !wxUSE_UNICODE
  68                             m_FontsEncTable[i][j][k][l][m] = wxFONTENCODING_DEFAULT;
  69 #endif
  70                         }
  71
  72         SetFonts(wxEmptyString, wxEmptyString, NULL);
  73     }
  74
  75     // fill in wxHtmlParser's tables:
  76     wxList::compatibility_iterator node = m_Modules.GetFirst();
  77     while (node)
  78     {
  79         wxHtmlTagsModule *mod = (wxHtmlTagsModule*) node->GetData();
  80         mod->FillHandlersTable(this);
  81         node = node->GetNext();
  82     }
  83 }
  84
  85 wxHtmlWinParser::~wxHtmlWinParser()
  86 {
  87     int i, j, k, l, m;
  88
  89     for (i = 0; i < 2; i++)
  90         for (j = 0; j < 2; j++)
  91             for (k = 0; k < 2; k++)
  92                 for (l = 0; l < 2; l++)
  93                     for (m = 0; m < 7; m++)
  94                     {
  95                         if (m_FontsTable[i][j][k][l][m] != NULL)
  96                             delete m_FontsTable[i][j][k][l][m];
  97                     }
  98 #if !wxUSE_UNICODE
  99     delete m_EncConv;
 100 #endif
 101     delete[] m_tmpStrBuf;
 102 }
 103
 104 void wxHtmlWinParser::AddModule(wxHtmlTagsModule *module)
 105 {
 106     m_Modules.Append(module);
 107 }
 108
 109 void wxHtmlWinParser::RemoveModule(wxHtmlTagsModule *module)
 110 {
 111     m_Modules.DeleteObject(module);
 112 }
 113
 114 void wxHtmlWinParser::SetFonts(const wxString& normal_face, const wxString& fixed_face,
 115                                const int *sizes)
 116 {
 117     static int default_sizes[7] =
 118         {
 119             wxHTML_FONT_SIZE_1,
 120             wxHTML_FONT_SIZE_2,
 121             wxHTML_FONT_SIZE_3,
 122             wxHTML_FONT_SIZE_4,
 123             wxHTML_FONT_SIZE_5,
 124             wxHTML_FONT_SIZE_6,
 125             wxHTML_FONT_SIZE_7
 126         };
 127
 128     if (sizes == NULL) sizes = default_sizes;
 129
 130     int i, j, k, l, m;
 131
 132     for (i = 0; i < 7; i++) m_FontsSizes[i] = sizes[i];
 133     m_FontFaceFixed = fixed_face;
 134     m_FontFaceNormal = normal_face;
 135
 136 #if !wxUSE_UNICODE
 137     SetInputEncoding(m_InputEnc);
 138 #endif
 139
 140     for (i = 0; i < 2; i++)
 141         for (j = 0; j < 2; j++)
 142             for (k = 0; k < 2; k++)
 143                 for (l = 0; l < 2; l++)
 144                     for (m = 0; m < 7; m++) {
 145                         if (m_FontsTable[i][j][k][l][m] != NULL)
 146                         {
 147                             delete m_FontsTable[i][j][k][l][m];
 148                             m_FontsTable[i][j][k][l][m] = NULL;
 149                         }
 150                     }
 151 }
 152
 153 void wxHtmlWinParser::SetStandardFonts(int size,
 154                                        const wxString& normal_face,
 155                                        const wxString& fixed_face)
 156 {
 157     wxFont defaultFont = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
 158
 159     int f_sizes[7];
 160     if (size == -1)
 161         size = defaultFont.GetPointSize();
 162
 163     f_sizes[0] = int(size * 0.6);
 164     f_sizes[1] = int(size * 0.8);
 165     f_sizes[2] = size;
 166     f_sizes[3] = int(size * 1.2);
 167     f_sizes[4] = int(size * 1.4);
 168     f_sizes[5] = int(size * 1.6);
 169     f_sizes[6] = int(size * 1.8);
 170
 171     wxString normal = normal_face.empty() ?
 172                       defaultFont.GetFaceName() : normal_face;
 173
 174     SetFonts(normal, fixed_face, f_sizes);
 175 }
 176
 177 void wxHtmlWinParser::InitParser(const wxString& source)
 178 {
 179     wxHtmlParser::InitParser(source);
 180     wxASSERT_MSG(m_DC != NULL, wxT("no DC assigned to wxHtmlWinParser!!"));
 181
 182     m_FontBold = m_FontItalic = m_FontUnderlined = m_FontFixed = FALSE;
 183     m_FontSize = 3; //default one
 184     CreateCurrentFont();           // we're selecting default font into
 185     m_DC->GetTextExtent( wxT("H"), &m_CharWidth, &m_CharHeight);
 186                 /* NOTE : we're not using GetCharWidth/Height() because
 187                    of differences under X and win
 188                  */
 189
 190     m_UseLink = false;
 191     m_Link = wxHtmlLinkInfo( wxEmptyString );
 192     m_LinkColor.Set(0, 0, 0xFF);
 193     m_ActualColor.Set(0, 0, 0);
 194     m_Align = wxHTML_ALIGN_LEFT;
 195     m_ScriptMode = wxHTML_SCRIPT_NORMAL;
 196     m_ScriptBaseline = 0;
 197     m_tmpLastWasSpace = false;
 198     m_lastWordCell = NULL;
 199
 200     OpenContainer();
 201     OpenContainer();
 202
 203 #if !wxUSE_UNICODE
 204     wxString charset = ExtractCharsetInformation(source);
 205     if (!charset.empty())
 206     {
 207         wxFontEncoding enc = wxFontMapper::Get()->CharsetToEncoding(charset);
 208         if (enc != wxFONTENCODING_SYSTEM)
 209           SetInputEncoding(enc);
 210     }
 211 #endif
 212
 213     m_Container->InsertCell(new wxHtmlColourCell(m_ActualColor));
 214     wxColour windowColour = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW) ;
 215     m_Container->InsertCell(
 216             new wxHtmlColourCell(GetWindow() ?
 217                                      GetWindow()->GetBackgroundColour() :
 218                                      windowColour,
 219                                  wxHTML_CLR_BACKGROUND));
 220     m_Container->InsertCell(new wxHtmlFontCell(CreateCurrentFont()));
 221 }
 222
 223 void wxHtmlWinParser::DoneParser()
 224 {
 225     m_Container = NULL;
 226 #if !wxUSE_UNICODE
 227     SetInputEncoding(wxFONTENCODING_ISO8859_1); // for next call
 228 #endif
 229     wxHtmlParser::DoneParser();
 230 }
 231
 232 wxObject* wxHtmlWinParser::GetProduct()
 233 {
 234     wxHtmlContainerCell *top;
 235
 236     CloseContainer();
 237     OpenContainer();
 238
 239     top = m_Container;
 240     while (top->GetParent()) top = top->GetParent();
 241     top->RemoveExtraSpacing(true, true);
 242
 243     return top;
 244 }
 245
 246 wxFSFile *wxHtmlWinParser::OpenURL(wxHtmlURLType type,
 247                                    const wxString& url) const
 248 {
 249     if ( m_Window )
 250     {
 251         wxString myurl(url);
 252         wxHtmlOpeningStatus status;
 253         for (;;)
 254         {
 255             wxString myfullurl(myurl);
 256
 257             // consider url as absolute path first
 258             wxURI current(myurl);
 259             myfullurl = current.BuildUnescapedURI();
 260
 261             // if not absolute then ...
 262             if( current.IsReference() )
 263             {
 264                 wxString basepath = GetFS()->GetPath();
 265                 wxURI base(basepath);
 266
 267                 // ... try to apply base path if valid ...
 268                 if( !base.IsReference() )
 269                 {
 270                     wxURI path(myfullurl);
 271                     path.Resolve( base );
 272                     myfullurl = path.BuildUnescapedURI();
 273                 }
 274                 else
 275                 {
 276                     // ... or force such addition if not included already
 277                     if( !current.GetPath().Contains(base.GetPath()) )
 278                     {
 279                         basepath += myurl;
 280                         wxURI connected( basepath );
 281                         myfullurl = connected.BuildUnescapedURI();
 282                     }
 283                 }
 284             }
 285
 286             wxString redirect;
 287             status = m_Window->OnOpeningURL(type, myfullurl, &redirect);
 288             if ( status != wxHTML_REDIRECT )
 289                 break;
 290
 291             myurl = redirect;
 292         }
 293
 294         if ( status == wxHTML_BLOCK )
 295             return NULL;
 296
 297         return GetFS()->OpenFile(myurl);
 298     }
 299
 300     return wxHtmlParser::OpenURL(type, url);
 301 }
 302
 303 void wxHtmlWinParser::AddText(const wxChar* txt)
 304 {
 305     size_t i = 0,
 306            x,
 307            lng = wxStrlen(txt);
 308     register wxChar d;
 309     int templen = 0;
 310     wxChar nbsp = GetEntitiesParser()->GetCharForCode(160 /* nbsp */);
 311
 312     if (lng+1 > m_tmpStrBufSize)
 313     {
 314         delete[] m_tmpStrBuf;
 315         m_tmpStrBuf = new wxChar[lng+1];
 316         m_tmpStrBufSize = lng+1;
 317     }
 318     wxChar *temp = m_tmpStrBuf;
 319
 320     if (m_tmpLastWasSpace)
 321     {
 322         while ((i < lng) &&
 323                ((txt[i] == wxT('\n')) || (txt[i] == wxT('\r')) || (txt[i] == wxT(' ')) ||
 324                 (txt[i] == wxT('\t')))) i++;
 325     }
 326
 327     while (i < lng)
 328     {
 329         x = 0;
 330         d = temp[templen++] = txt[i];
 331         if ((d == wxT('\n')) || (d == wxT('\r')) || (d == wxT(' ')) || (d == wxT('\t')))
 332         {
 333             i++, x++;
 334             while ((i < lng) && ((txt[i] == wxT('\n')) || (txt[i] == wxT('\r')) ||
 335                                  (txt[i] == wxT(' ')) || (txt[i] == wxT('\t')))) i++, x++;
 336         }
 337         else i++;
 338
 339         if (x)
 340         {
 341             temp[templen-1] = wxT(' ');
 342             DoAddText(temp, templen, nbsp);
 343             m_tmpLastWasSpace = true;
 344         }
 345     }
 346
 347     if (templen && (templen > 1 || temp[0] != wxT(' ')))
 348     {
 349         DoAddText(temp, templen, nbsp);
 350         m_tmpLastWasSpace = false;
 351     }
 352 }
 353
 354 void wxHtmlWinParser::DoAddText(wxChar *temp, int& templen, wxChar nbsp)
 355 {
 356     temp[templen] = 0;
 357     templen = 0;
 358 #if !wxUSE_UNICODE
 359     if (m_EncConv)
 360         m_EncConv->Convert(temp);
 361 #endif
 362     size_t len = wxStrlen(temp);
 363     for (size_t j = 0; j < len; j++)
 364     {
 365         if (temp[j] == nbsp)
 366             temp[j] = wxT(' ');
 367     }
 368
 369     wxHtmlCell *c = new wxHtmlWordCell(temp, *(GetDC()));
 370
 371     ApplyStateToCell(c);
 372
 373     m_Container->InsertCell(c);
 374     ((wxHtmlWordCell*)c)->SetPreviousWord(m_lastWordCell);
 375     m_lastWordCell = (wxHtmlWordCell*)c;
 376 }
 377
 378
 379
 380 wxHtmlContainerCell* wxHtmlWinParser::OpenContainer()
 381 {
 382     m_Container = new wxHtmlContainerCell(m_Container);
 383     m_Container->SetAlignHor(m_Align);
 384     m_tmpLastWasSpace = true;
 385         /* to avoid space being first character in paragraph */
 386     return m_Container;
 387 }
 388
 389
 390
 391 wxHtmlContainerCell* wxHtmlWinParser::SetContainer(wxHtmlContainerCell *c)
 392 {
 393     m_tmpLastWasSpace = true;
 394         /* to avoid space being first character in paragraph */
 395     return m_Container = c;
 396 }
 397
 398
 399
 400 wxHtmlContainerCell* wxHtmlWinParser::CloseContainer()
 401 {
 402     m_Container = m_Container->GetParent();
 403     return m_Container;
 404 }
 405
 406
 407 void wxHtmlWinParser::SetFontSize(int s)
 408 {
 409     if (s < 1) s = 1;
 410     else if (s > 7) s = 7;
 411     m_FontSize = s;
 412 }
 413
 414
 415
 416 wxFont* wxHtmlWinParser::CreateCurrentFont()
 417 {
 418     int fb = GetFontBold(),
 419         fi = GetFontItalic(),
 420         fu = GetFontUnderlined(),
 421         ff = GetFontFixed(),
 422         fs = GetFontSize() - 1 /*remap from <1;7> to <0;6>*/ ;
 423
 424     wxString face = ff ? m_FontFaceFixed : m_FontFaceNormal;
 425     wxString *faceptr = &(m_FontsFacesTable[fb][fi][fu][ff][fs]);
 426     wxFont **fontptr = &(m_FontsTable[fb][fi][fu][ff][fs]);
 427 #if !wxUSE_UNICODE
 428     wxFontEncoding *encptr = &(m_FontsEncTable[fb][fi][fu][ff][fs]);
 429 #endif
 430
 431     if (*fontptr != NULL && (*faceptr != face
 432 #if !wxUSE_UNICODE
 433                              || *encptr != m_OutputEnc
 434 #endif
 435                             ))
 436     {
 437         delete *fontptr;
 438         *fontptr = NULL;
 439     }
 440
 441     if (*fontptr == NULL)
 442     {
 443         *faceptr = face;
 444         *fontptr = new wxFont(
 445                        (int) (m_FontsSizes[fs] * m_PixelScale),
 446                        ff ? wxMODERN : wxSWISS,
 447                        fi ? wxITALIC : wxNORMAL,
 448                        fb ? wxBOLD : wxNORMAL,
 449                        fu ? true : false, face
 450 #if wxUSE_UNICODE
 451                        );
 452 #else
 453                        , m_OutputEnc);
 454         *encptr = m_OutputEnc;
 455 #endif
 456     }
 457     m_DC->SetFont(**fontptr);
 458     return (*fontptr);
 459 }
 460
 461
 462
 463 void wxHtmlWinParser::SetLink(const wxHtmlLinkInfo& link)
 464 {
 465     m_Link = link;
 466     m_UseLink = (link.GetHref() != wxEmptyString);
 467 }
 468
 469 void wxHtmlWinParser::SetFontFace(const wxString& face)
 470 {
 471     if (GetFontFixed()) m_FontFaceFixed = face;
 472     else m_FontFaceNormal = face;
 473
 474 #if !wxUSE_UNICODE
 475     if (m_InputEnc != wxFONTENCODING_DEFAULT)
 476         SetInputEncoding(m_InputEnc);
 477 #endif
 478 }
 479
 480 void wxHtmlWinParser::ApplyStateToCell(wxHtmlCell *cell)
 481 {
 482     // set the link:
 483     if (m_UseLink)
 484         cell->SetLink(GetLink());
 485
 486     // apply current script mode settings:
 487     cell->SetScriptMode(GetScriptMode(), GetScriptBaseline());
 488 }
 489
 490
 491 #if !wxUSE_UNICODE
 492 void wxHtmlWinParser::SetInputEncoding(wxFontEncoding enc)
 493 {
 494     m_InputEnc = m_OutputEnc = wxFONTENCODING_DEFAULT;
 495     if (m_EncConv)
 496     {
 497         delete m_EncConv;
 498         m_EncConv = NULL;
 499     }
 500
 501     if (enc == wxFONTENCODING_DEFAULT) return;
 502
 503     wxFontEncoding altfix, altnorm;
 504     bool availfix, availnorm;
 505
 506     // exact match?
 507     availnorm = wxFontMapper::Get()->IsEncodingAvailable(enc, m_FontFaceNormal);
 508     availfix = wxFontMapper::Get()->IsEncodingAvailable(enc, m_FontFaceFixed);
 509     if (availnorm && availfix)
 510         m_OutputEnc = enc;
 511
 512     // alternatives?
 513     else if (wxFontMapper::Get()->GetAltForEncoding(enc, &altnorm, m_FontFaceNormal, false) &&
 514              wxFontMapper::Get()->GetAltForEncoding(enc, &altfix, m_FontFaceFixed, false) &&
 515              altnorm == altfix)
 516         m_OutputEnc = altnorm;
 517
 518     // at least normal face?
 519     else if (availnorm)
 520         m_OutputEnc = enc;
 521     else if (wxFontMapper::Get()->GetAltForEncoding(enc, &altnorm, m_FontFaceNormal, false))
 522         m_OutputEnc = altnorm;
 523
 524     else
 525     {
 526 #ifndef __WXMAC__
 527         // okay, let convert to ISO_8859-1, available always
 528         m_OutputEnc = wxFONTENCODING_DEFAULT;
 529 #else
 530         m_OutputEnc = wxLocale::GetSystemEncoding() ;
 531 #endif
 532     }
 533
 534     m_InputEnc = enc;
 535     if (m_OutputEnc == wxFONTENCODING_DEFAULT)
 536         GetEntitiesParser()->SetEncoding(wxFONTENCODING_SYSTEM);
 537     else
 538         GetEntitiesParser()->SetEncoding(m_OutputEnc);
 539
 540     if (m_InputEnc == m_OutputEnc) return;
 541
 542     m_EncConv = new wxEncodingConverter();
 543     if (!m_EncConv->Init(m_InputEnc,
 544                            (m_OutputEnc == wxFONTENCODING_DEFAULT) ?
 545                                       wxFONTENCODING_ISO8859_1 : m_OutputEnc,
 546                            wxCONVERT_SUBSTITUTE))
 547     { // total failture :-(
 548         wxLogError(_("Failed to display HTML document in %s encoding"),
 549                    wxFontMapper::GetEncodingName(enc).c_str());
 550         m_InputEnc = m_OutputEnc = wxFONTENCODING_DEFAULT;
 551         delete m_EncConv;
 552         m_EncConv = NULL;
 553     }
 554 }
 555 #endif
 556
 557
 558
 559
 560 //-----------------------------------------------------------------------------
 561 // wxHtmlWinTagHandler
 562 //-----------------------------------------------------------------------------
 563
 564 IMPLEMENT_ABSTRACT_CLASS(wxHtmlWinTagHandler, wxHtmlTagHandler)
 565
 566 //-----------------------------------------------------------------------------
 567 // wxHtmlTagsModule
 568 //-----------------------------------------------------------------------------
 569
 570 // NB: This is *NOT* winpars.cpp's initialization and shutdown code!!
 571 //     This module is an ancestor for tag handlers modules defined
 572 //     in m_*.cpp files with TAGS_MODULE_BEGIN...TAGS_MODULE_END construct.
 573 //
 574 //     Do not add any winpars.cpp shutdown or initialization code to it,
 575 //     create a new module instead!
 576
 577 IMPLEMENT_DYNAMIC_CLASS(wxHtmlTagsModule, wxModule)
 578
 579 bool wxHtmlTagsModule::OnInit()
 580 {
 581     wxHtmlWinParser::AddModule(this);
 582     return true;
 583 }
 584
 585 void wxHtmlTagsModule::OnExit()
 586 {
 587     wxHtmlWinParser::RemoveModule(this);
 588 }
 589
 590 #endif
 591