src/html/winpars.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/html/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 #ifdef __BORLANDC__
  13     #pragma hdrstop
  14 #endif
  15
  16 #if wxUSE_HTML && wxUSE_STREAMS
  17
  18 #ifndef WXPRECOMP
  19     #include "wx/intl.h"
  20     #include "wx/dc.h"
  21     #include "wx/log.h"
  22     #include "wx/settings.h"
  23 #endif
  24
  25 #include "wx/html/htmldefs.h"
  26 #include "wx/html/winpars.h"
  27 #include "wx/html/htmlwin.h"
  28 #include "wx/fontmap.h"
  29 #include "wx/uri.h"
  30
  31
  32 //-----------------------------------------------------------------------------
  33 // wxHtmlWinParser
  34 //-----------------------------------------------------------------------------
  35
  36 IMPLEMENT_ABSTRACT_CLASS(wxHtmlWinParser, wxHtmlParser)
  37
  38 wxList wxHtmlWinParser::m_Modules;
  39
  40 wxHtmlWinParser::wxHtmlWinParser(wxHtmlWindowInterface *wndIface)
  41 {
  42     m_tmpStrBuf = NULL;
  43     m_tmpStrBufSize = 0;
  44     m_windowInterface = wndIface;
  45     m_Container = NULL;
  46     m_DC = NULL;
  47     m_CharHeight = m_CharWidth = 0;
  48     m_UseLink = false;
  49 #if !wxUSE_UNICODE
  50     m_EncConv = NULL;
  51     m_InputEnc = wxFONTENCODING_ISO8859_1;
  52     m_OutputEnc = wxFONTENCODING_DEFAULT;
  53 #endif
  54     m_lastWordCell = NULL;
  55
  56     {
  57         int i, j, k, l, m;
  58         for (i = 0; i < 2; i++)
  59             for (j = 0; j < 2; j++)
  60                 for (k = 0; k < 2; k++)
  61                     for (l = 0; l < 2; l++)
  62                         for (m = 0; m < 7; m++)
  63                         {
  64                             m_FontsTable[i][j][k][l][m] = NULL;
  65                             m_FontsFacesTable[i][j][k][l][m] = wxEmptyString;
  66 #if !wxUSE_UNICODE
  67                             m_FontsEncTable[i][j][k][l][m] = wxFONTENCODING_DEFAULT;
  68 #endif
  69                         }
  70
  71         SetFonts(wxEmptyString, wxEmptyString, NULL);
  72     }
  73
  74     // fill in wxHtmlParser's tables:
  75     wxList::compatibility_iterator node = m_Modules.GetFirst();
  76     while (node)
  77     {
  78         wxHtmlTagsModule *mod = (wxHtmlTagsModule*) node->GetData();
  79         mod->FillHandlersTable(this);
  80         node = node->GetNext();
  81     }
  82 }
  83
  84 wxHtmlWinParser::~wxHtmlWinParser()
  85 {
  86     int i, j, k, l, m;
  87
  88     for (i = 0; i < 2; i++)
  89         for (j = 0; j < 2; j++)
  90             for (k = 0; k < 2; k++)
  91                 for (l = 0; l < 2; l++)
  92                     for (m = 0; m < 7; m++)
  93                     {
  94                         if (m_FontsTable[i][j][k][l][m] != NULL)
  95                             delete m_FontsTable[i][j][k][l][m];
  96                     }
  97 #if !wxUSE_UNICODE
  98     delete m_EncConv;
  99 #endif
 100     delete[] m_tmpStrBuf;
 101 }
 102
 103 void wxHtmlWinParser::AddModule(wxHtmlTagsModule *module)
 104 {
 105     m_Modules.Append(module);
 106 }
 107
 108 void wxHtmlWinParser::RemoveModule(wxHtmlTagsModule *module)
 109 {
 110     m_Modules.DeleteObject(module);
 111 }
 112
 113 void wxHtmlWinParser::SetFonts(const wxString& normal_face, const wxString& fixed_face,
 114                                const int *sizes)
 115 {
 116     static int default_sizes[7] =
 117         {
 118             wxHTML_FONT_SIZE_1,
 119             wxHTML_FONT_SIZE_2,
 120             wxHTML_FONT_SIZE_3,
 121             wxHTML_FONT_SIZE_4,
 122             wxHTML_FONT_SIZE_5,
 123             wxHTML_FONT_SIZE_6,
 124             wxHTML_FONT_SIZE_7
 125         };
 126
 127     if (sizes == NULL) sizes = default_sizes;
 128
 129     int i, j, k, l, m;
 130
 131     for (i = 0; i < 7; i++) m_FontsSizes[i] = sizes[i];
 132     m_FontFaceFixed = fixed_face;
 133     m_FontFaceNormal = normal_face;
 134
 135 #if !wxUSE_UNICODE
 136     SetInputEncoding(m_InputEnc);
 137 #endif
 138
 139     for (i = 0; i < 2; i++)
 140         for (j = 0; j < 2; j++)
 141             for (k = 0; k < 2; k++)
 142                 for (l = 0; l < 2; l++)
 143                     for (m = 0; m < 7; m++) {
 144                         if (m_FontsTable[i][j][k][l][m] != NULL)
 145                         {
 146                             delete m_FontsTable[i][j][k][l][m];
 147                             m_FontsTable[i][j][k][l][m] = NULL;
 148                         }
 149                     }
 150 }
 151
 152 void wxHtmlWinParser::SetStandardFonts(int size,
 153                                        const wxString& normal_face,
 154                                        const wxString& fixed_face)
 155 {
 156     wxFont defaultFont = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
 157
 158     int f_sizes[7];
 159     if (size == -1)
 160         size = defaultFont.GetPointSize();
 161
 162     f_sizes[0] = int(size * 0.6);
 163     f_sizes[1] = int(size * 0.8);
 164     f_sizes[2] = size;
 165     f_sizes[3] = int(size * 1.2);
 166     f_sizes[4] = int(size * 1.4);
 167     f_sizes[5] = int(size * 1.6);
 168     f_sizes[6] = int(size * 1.8);
 169
 170     wxString normal = normal_face.empty() ?
 171                       defaultFont.GetFaceName() : normal_face;
 172
 173     SetFonts(normal, fixed_face, f_sizes);
 174 }
 175
 176 void wxHtmlWinParser::InitParser(const wxString& source)
 177 {
 178     wxHtmlParser::InitParser(source);
 179     wxASSERT_MSG(m_DC != NULL, wxT("no DC assigned to wxHtmlWinParser!!"));
 180
 181     m_FontBold = m_FontItalic = m_FontUnderlined = m_FontFixed = FALSE;
 182     m_FontSize = 3; //default one
 183     CreateCurrentFont();           // we're selecting default font into
 184     m_DC->GetTextExtent( wxT("H"), &m_CharWidth, &m_CharHeight);
 185                 /* NOTE : we're not using GetCharWidth/Height() because
 186                    of differences under X and win
 187                  */
 188
 189     m_UseLink = false;
 190     m_Link = wxHtmlLinkInfo( wxEmptyString );
 191     m_LinkColor.Set(0, 0, 0xFF);
 192     m_ActualColor.Set(0, 0, 0);
 193     m_Align = wxHTML_ALIGN_LEFT;
 194     m_ScriptMode = wxHTML_SCRIPT_NORMAL;
 195     m_ScriptBaseline = 0;
 196     m_tmpLastWasSpace = false;
 197     m_lastWordCell = NULL;
 198
 199     // open the toplevel container that contains everything else and that
 200     // is never closed (this makes parser's life easier):
 201     OpenContainer();
 202
 203     // then open the first container into which page's content will go:
 204     OpenContainer();
 205
 206 #if !wxUSE_UNICODE
 207     wxString charset = ExtractCharsetInformation(source);
 208     if (!charset.empty())
 209     {
 210         wxFontEncoding enc = wxFontMapper::Get()->CharsetToEncoding(charset);
 211         if (enc != wxFONTENCODING_SYSTEM)
 212           SetInputEncoding(enc);
 213     }
 214 #endif
 215
 216     m_Container->InsertCell(new wxHtmlColourCell(m_ActualColor));
 217     wxColour windowColour = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW) ;
 218
 219     m_Container->InsertCell
 220                  (
 221                    new wxHtmlColourCell
 222                        (
 223                          m_windowInterface
 224                             ? m_windowInterface->GetHTMLBackgroundColour()
 225                             : windowColour,
 226                          wxHTML_CLR_BACKGROUND
 227                        )
 228                   );
 229
 230     m_Container->InsertCell(new wxHtmlFontCell(CreateCurrentFont()));
 231 }
 232
 233 void wxHtmlWinParser::DoneParser()
 234 {
 235     m_Container = NULL;
 236 #if !wxUSE_UNICODE
 237     SetInputEncoding(wxFONTENCODING_ISO8859_1); // for next call
 238 #endif
 239     wxHtmlParser::DoneParser();
 240 }
 241
 242 #if WXWIN_COMPATIBILITY_2_6
 243 wxHtmlWindow *wxHtmlWinParser::GetWindow()
 244 {
 245     if (!m_windowInterface)
 246         return NULL;
 247     return wxDynamicCast(m_windowInterface->GetHTMLWindow(), wxHtmlWindow);
 248 }
 249 #endif
 250
 251 wxObject* wxHtmlWinParser::GetProduct()
 252 {
 253     wxHtmlContainerCell *top;
 254
 255     CloseContainer();
 256     OpenContainer();
 257
 258     top = m_Container;
 259     while (top->GetParent()) top = top->GetParent();
 260     top->RemoveExtraSpacing(true, true);
 261
 262     return top;
 263 }
 264
 265 wxFSFile *wxHtmlWinParser::OpenURL(wxHtmlURLType type,
 266                                    const wxString& url) const
 267 {
 268     if ( !m_windowInterface )
 269         return wxHtmlParser::OpenURL(type, url);
 270
 271     wxString myurl(url);
 272     wxHtmlOpeningStatus status;
 273     for (;;)
 274     {
 275         wxString myfullurl(myurl);
 276
 277         // consider url as absolute path first
 278         wxURI current(myurl);
 279         myfullurl = current.BuildUnescapedURI();
 280
 281         // if not absolute then ...
 282         if( current.IsReference() )
 283         {
 284             wxString basepath = GetFS()->GetPath();
 285             wxURI base(basepath);
 286
 287             // ... try to apply base path if valid ...
 288             if( !base.IsReference() )
 289             {
 290                 wxURI path(myfullurl);
 291                 path.Resolve( base );
 292                 myfullurl = path.BuildUnescapedURI();
 293             }
 294             else
 295             {
 296                 // ... or force such addition if not included already
 297                 if( !current.GetPath().Contains(base.GetPath()) )
 298                 {
 299                     basepath += myurl;
 300                     wxURI connected( basepath );
 301                     myfullurl = connected.BuildUnescapedURI();
 302                 }
 303             }
 304         }
 305
 306         wxString redirect;
 307         status = m_windowInterface->OnHTMLOpeningURL(type, myfullurl, &redirect);
 308         if ( status != wxHTML_REDIRECT )
 309             break;
 310
 311         myurl = redirect;
 312     }
 313
 314     if ( status == wxHTML_BLOCK )
 315         return NULL;
 316
 317     return GetFS()->OpenFile(myurl);
 318 }
 319
 320 void wxHtmlWinParser::AddText(const wxChar* txt)
 321 {
 322     size_t i = 0,
 323            x,
 324            lng = wxStrlen(txt);
 325     register wxChar d;
 326     int templen = 0;
 327     wxChar nbsp = GetEntitiesParser()->GetCharForCode(160 /* nbsp */);
 328
 329     if (lng+1 > m_tmpStrBufSize)
 330     {
 331         delete[] m_tmpStrBuf;
 332         m_tmpStrBuf = new wxChar[lng+1];
 333         m_tmpStrBufSize = lng+1;
 334     }
 335     wxChar *temp = m_tmpStrBuf;
 336
 337     if (m_tmpLastWasSpace)
 338     {
 339         while ((i < lng) &&
 340                ((txt[i] == wxT('\n')) || (txt[i] == wxT('\r')) || (txt[i] == wxT(' ')) ||
 341                 (txt[i] == wxT('\t')))) i++;
 342     }
 343
 344     while (i < lng)
 345     {
 346         x = 0;
 347         d = temp[templen++] = txt[i];
 348         if ((d == wxT('\n')) || (d == wxT('\r')) || (d == wxT(' ')) || (d == wxT('\t')))
 349         {
 350             i++, x++;
 351             while ((i < lng) && ((txt[i] == wxT('\n')) || (txt[i] == wxT('\r')) ||
 352                                  (txt[i] == wxT(' ')) || (txt[i] == wxT('\t')))) i++, x++;
 353         }
 354         else i++;
 355
 356         if (x)
 357         {
 358             temp[templen-1] = wxT(' ');
 359             DoAddText(temp, templen, nbsp);
 360             m_tmpLastWasSpace = true;
 361         }
 362     }
 363
 364     if (templen && (templen > 1 || temp[0] != wxT(' ')))
 365     {
 366         DoAddText(temp, templen, nbsp);
 367         m_tmpLastWasSpace = false;
 368     }
 369 }
 370
 371 void wxHtmlWinParser::DoAddText(wxChar *temp, int& templen, wxChar nbsp)
 372 {
 373     temp[templen] = 0;
 374     templen = 0;
 375 #if !wxUSE_UNICODE
 376     if (m_EncConv)
 377         m_EncConv->Convert(temp);
 378 #endif
 379     size_t len = wxStrlen(temp);
 380     for (size_t j = 0; j < len; j++)
 381     {
 382         if (temp[j] == nbsp)
 383             temp[j] = wxT(' ');
 384     }
 385
 386     wxHtmlCell *c = new wxHtmlWordCell(temp, *(GetDC()));
 387
 388     ApplyStateToCell(c);
 389
 390     m_Container->InsertCell(c);
 391     ((wxHtmlWordCell*)c)->SetPreviousWord(m_lastWordCell);
 392     m_lastWordCell = (wxHtmlWordCell*)c;
 393 }
 394
 395
 396
 397 wxHtmlContainerCell* wxHtmlWinParser::OpenContainer()
 398 {
 399     m_Container = new wxHtmlContainerCell(m_Container);
 400     m_Container->SetAlignHor(m_Align);
 401     m_tmpLastWasSpace = true;
 402         /* to avoid space being first character in paragraph */
 403     return m_Container;
 404 }
 405
 406
 407
 408 wxHtmlContainerCell* wxHtmlWinParser::SetContainer(wxHtmlContainerCell *c)
 409 {
 410     m_tmpLastWasSpace = true;
 411         /* to avoid space being first character in paragraph */
 412     return m_Container = c;
 413 }
 414
 415
 416
 417 wxHtmlContainerCell* wxHtmlWinParser::CloseContainer()
 418 {
 419     m_Container = m_Container->GetParent();
 420     return m_Container;
 421 }
 422
 423
 424 void wxHtmlWinParser::SetFontSize(int s)
 425 {
 426     if (s < 1) s = 1;
 427     else if (s > 7) s = 7;
 428     m_FontSize = s;
 429 }
 430
 431
 432
 433 wxFont* wxHtmlWinParser::CreateCurrentFont()
 434 {
 435     int fb = GetFontBold(),
 436         fi = GetFontItalic(),
 437         fu = GetFontUnderlined(),
 438         ff = GetFontFixed(),
 439         fs = GetFontSize() - 1 /*remap from <1;7> to <0;6>*/ ;
 440
 441     wxString face = ff ? m_FontFaceFixed : m_FontFaceNormal;
 442     wxString *faceptr = &(m_FontsFacesTable[fb][fi][fu][ff][fs]);
 443     wxFont **fontptr = &(m_FontsTable[fb][fi][fu][ff][fs]);
 444 #if !wxUSE_UNICODE
 445     wxFontEncoding *encptr = &(m_FontsEncTable[fb][fi][fu][ff][fs]);
 446 #endif
 447
 448     if (*fontptr != NULL && (*faceptr != face
 449 #if !wxUSE_UNICODE
 450                              || *encptr != m_OutputEnc
 451 #endif
 452                             ))
 453     {
 454         delete *fontptr;
 455         *fontptr = NULL;
 456     }
 457
 458     if (*fontptr == NULL)
 459     {
 460         *faceptr = face;
 461         *fontptr = new wxFont(
 462                        (int) (m_FontsSizes[fs] * m_PixelScale),
 463                        ff ? wxMODERN : wxSWISS,
 464                        fi ? wxITALIC : wxNORMAL,
 465                        fb ? wxBOLD : wxNORMAL,
 466                        fu ? true : false, face
 467 #if wxUSE_UNICODE
 468                        );
 469 #else
 470                        , m_OutputEnc);
 471         *encptr = m_OutputEnc;
 472 #endif
 473     }
 474     m_DC->SetFont(**fontptr);
 475     return (*fontptr);
 476 }
 477
 478
 479
 480 void wxHtmlWinParser::SetLink(const wxHtmlLinkInfo& link)
 481 {
 482     m_Link = link;
 483     m_UseLink = (link.GetHref() != wxEmptyString);
 484 }
 485
 486 void wxHtmlWinParser::SetFontFace(const wxString& face)
 487 {
 488     if (GetFontFixed()) m_FontFaceFixed = face;
 489     else m_FontFaceNormal = face;
 490
 491 #if !wxUSE_UNICODE
 492     if (m_InputEnc != wxFONTENCODING_DEFAULT)
 493         SetInputEncoding(m_InputEnc);
 494 #endif
 495 }
 496
 497 void wxHtmlWinParser::ApplyStateToCell(wxHtmlCell *cell)
 498 {
 499     // set the link:
 500     if (m_UseLink)
 501         cell->SetLink(GetLink());
 502
 503     // apply current script mode settings:
 504     cell->SetScriptMode(GetScriptMode(), GetScriptBaseline());
 505 }
 506
 507
 508 #if !wxUSE_UNICODE
 509 void wxHtmlWinParser::SetInputEncoding(wxFontEncoding enc)
 510 {
 511     m_InputEnc = m_OutputEnc = wxFONTENCODING_DEFAULT;
 512     if (m_EncConv)
 513     {
 514         delete m_EncConv;
 515         m_EncConv = NULL;
 516     }
 517
 518     if (enc == wxFONTENCODING_DEFAULT) return;
 519
 520     wxFontEncoding altfix, altnorm;
 521     bool availfix, availnorm;
 522
 523     // exact match?
 524     availnorm = wxFontMapper::Get()->IsEncodingAvailable(enc, m_FontFaceNormal);
 525     availfix = wxFontMapper::Get()->IsEncodingAvailable(enc, m_FontFaceFixed);
 526     if (availnorm && availfix)
 527         m_OutputEnc = enc;
 528
 529     // alternatives?
 530     else if (wxFontMapper::Get()->GetAltForEncoding(enc, &altnorm, m_FontFaceNormal, false) &&
 531              wxFontMapper::Get()->GetAltForEncoding(enc, &altfix, m_FontFaceFixed, false) &&
 532              altnorm == altfix)
 533         m_OutputEnc = altnorm;
 534
 535     // at least normal face?
 536     else if (availnorm)
 537         m_OutputEnc = enc;
 538     else if (wxFontMapper::Get()->GetAltForEncoding(enc, &altnorm, m_FontFaceNormal, false))
 539         m_OutputEnc = altnorm;
 540
 541     else
 542     {
 543 #ifndef __WXMAC__
 544         // okay, let's convert to ISO_8859-1, available always
 545         m_OutputEnc = wxFONTENCODING_DEFAULT;
 546 #else
 547         m_OutputEnc = wxLocale::GetSystemEncoding() ;
 548 #endif
 549     }
 550
 551     m_InputEnc = enc;
 552     if (m_OutputEnc == wxFONTENCODING_DEFAULT)
 553         GetEntitiesParser()->SetEncoding(wxFONTENCODING_SYSTEM);
 554     else
 555         GetEntitiesParser()->SetEncoding(m_OutputEnc);
 556
 557     if (m_InputEnc == m_OutputEnc) return;
 558
 559     m_EncConv = new wxEncodingConverter();
 560     if (!m_EncConv->Init(m_InputEnc,
 561                            (m_OutputEnc == wxFONTENCODING_DEFAULT) ?
 562                                       wxFONTENCODING_ISO8859_1 : m_OutputEnc,
 563                            wxCONVERT_SUBSTITUTE))
 564     { // total failure :-(
 565         wxLogError(_("Failed to display HTML document in %s encoding"),
 566                    wxFontMapper::GetEncodingName(enc).c_str());
 567         m_InputEnc = m_OutputEnc = wxFONTENCODING_DEFAULT;
 568         delete m_EncConv;
 569         m_EncConv = NULL;
 570     }
 571 }
 572 #endif
 573
 574
 575
 576
 577 //-----------------------------------------------------------------------------
 578 // wxHtmlWinTagHandler
 579 //-----------------------------------------------------------------------------
 580
 581 IMPLEMENT_ABSTRACT_CLASS(wxHtmlWinTagHandler, wxHtmlTagHandler)
 582
 583 //-----------------------------------------------------------------------------
 584 // wxHtmlTagsModule
 585 //-----------------------------------------------------------------------------
 586
 587 // NB: This is *NOT* winpars.cpp's initialization and shutdown code!!
 588 //     This module is an ancestor for tag handlers modules defined
 589 //     in m_*.cpp files with TAGS_MODULE_BEGIN...TAGS_MODULE_END construct.
 590 //
 591 //     Do not add any winpars.cpp shutdown or initialization code to it,
 592 //     create a new module instead!
 593
 594 IMPLEMENT_DYNAMIC_CLASS(wxHtmlTagsModule, wxModule)
 595
 596 bool wxHtmlTagsModule::OnInit()
 597 {
 598     wxHtmlWinParser::AddModule(this);
 599     return true;
 600 }
 601
 602 void wxHtmlTagsModule::OnExit()
 603 {
 604     wxHtmlWinParser::RemoveModule(this);
 605 }
 606
 607 #endif