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