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
  13 #endif
  14
  15 #include "wx/wxprec.h"
  16
  17 #include "wx/defs.h"
  18 #if wxUSE_HTML && wxUSE_STREAMS
  19
  20 #ifdef __BORDLANDC__
  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(wxWindow *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     m_EncConv = NULL;
  53     m_InputEnc = m_OutputEnc = wxFONTENCODING_DEFAULT;
  54
  55     {
  56         int i, j, k, l, m;
  57         for (i = 0; i < 2; i++)
  58             for (j = 0; j < 2; j++)
  59                 for (k = 0; k < 2; k++)
  60                     for (l = 0; l < 2; l++)
  61                         for (m = 0; m < 7; m++)
  62                         {
  63                             m_FontsTable[i][j][k][l][m] = NULL;
  64                             m_FontsFacesTable[i][j][k][l][m] = wxEmptyString;
  65                             m_FontsEncTable[i][j][k][l][m] = wxFONTENCODING_DEFAULT;
  66                         }
  67 #ifdef __WXMSW__
  68         static int default_sizes[7] = {7, 8, 10, 12, 16, 22, 30};
  69 #elif defined(__WXMAC__)
  70         static int default_sizes[7] = {9, 12, 14, 18, 24, 30, 36};
  71 #else
  72         static int default_sizes[7] = {10, 12, 14, 16, 19, 24, 32};
  73 #endif
  74         SetFonts("", "", default_sizes);
  75     }
  76
  77     // fill in wxHtmlParser's tables:
  78     wxNode *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
  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     delete m_EncConv;
 102     delete[] m_tmpStrBuf;
 103 }
 104
 105
 106 void wxHtmlWinParser::AddModule(wxHtmlTagsModule *module)
 107 {
 108     m_Modules.Append(module);
 109 }
 110
 111
 112
 113 void wxHtmlWinParser::RemoveModule(wxHtmlTagsModule *module)
 114 {
 115     m_Modules.DeleteObject(module);
 116 }
 117
 118
 119
 120 void wxHtmlWinParser::SetFonts(wxString normal_face, wxString fixed_face, const int *sizes)
 121 {
 122     int i, j, k, l, m;
 123
 124     for (i = 0; i < 7; i++) m_FontsSizes[i] = sizes[i];
 125     m_FontFaceFixed = fixed_face;
 126     m_FontFaceNormal = normal_face;
 127
 128     SetInputEncoding(m_InputEnc);
 129
 130     for (i = 0; i < 2; i++)
 131         for (j = 0; j < 2; j++)
 132             for (k = 0; k < 2; k++)
 133                 for (l = 0; l < 2; l++)
 134                     for (m = 0; m < 7; m++) {
 135                         if (m_FontsTable[i][j][k][l][m] != NULL)
 136                         {
 137                             delete m_FontsTable[i][j][k][l][m];
 138                             m_FontsTable[i][j][k][l][m] = NULL;
 139                         }
 140                     }
 141 }
 142
 143
 144
 145 void wxHtmlWinParser::InitParser(const wxString& source)
 146 {
 147     wxHtmlParser::InitParser(source);
 148     wxASSERT_MSG(m_DC != NULL, _T("no DC assigned to wxHtmlWinParser!!"));
 149
 150     m_FontBold = m_FontItalic = m_FontUnderlined = m_FontFixed = FALSE;
 151     m_FontSize = 3; //default one
 152     CreateCurrentFont();           // we're selecting default font into
 153     m_DC->GetTextExtent("H", &m_CharWidth, &m_CharHeight);
 154                 /* NOTE : we're not using GetCharWidth/Height() because
 155                    of differences under X and win
 156                  */
 157
 158     m_UseLink = FALSE;
 159     m_Link = wxHtmlLinkInfo("", "");
 160     m_LinkColor.Set(0, 0, 0xFF);
 161     m_ActualColor.Set(0, 0, 0);
 162     m_Align = wxHTML_ALIGN_LEFT;
 163     m_tmpLastWasSpace = FALSE;
 164
 165     OpenContainer();
 166
 167     OpenContainer();
 168     m_Container->InsertCell(new wxHtmlColourCell(m_ActualColor));
 169     m_Container->InsertCell(new wxHtmlFontCell(CreateCurrentFont()));
 170 }
 171
 172
 173
 174 void wxHtmlWinParser::DoneParser()
 175 {
 176     m_Container = NULL;
 177     SetInputEncoding(wxFONTENCODING_DEFAULT); // for next call
 178     wxHtmlParser::DoneParser();
 179 }
 180
 181
 182
 183 wxObject* wxHtmlWinParser::GetProduct()
 184 {
 185     wxHtmlContainerCell *top;
 186
 187     CloseContainer();
 188     OpenContainer();
 189
 190     top = m_Container;
 191     while (top->GetParent()) top = top->GetParent();
 192     return top;
 193 }
 194
 195
 196 void wxHtmlWinParser::AddText(const wxChar* txt)
 197 {
 198     wxHtmlCell *c;
 199     size_t i = 0,
 200            x,
 201            lng = wxStrlen(txt);
 202     register wxChar d;
 203     int templen = 0;
 204     wxChar nbsp = GetEntitiesParser()->GetCharForCode(160 /* nbsp */);
 205
 206     if (lng+1 > m_tmpStrBufSize)
 207     {
 208         delete[] m_tmpStrBuf;
 209         m_tmpStrBuf = new wxChar[lng+1];
 210         m_tmpStrBufSize = lng+1;
 211     }
 212     wxChar *temp = m_tmpStrBuf;
 213
 214     if (m_tmpLastWasSpace)
 215     {
 216         while ((i < lng) &&
 217                ((txt[i] == wxT('\n')) || (txt[i] == wxT('\r')) || (txt[i] == wxT(' ')) ||
 218                 (txt[i] == wxT('\t')))) i++;
 219     }
 220
 221     while (i < lng)
 222     {
 223         x = 0;
 224         d = temp[templen++] = txt[i];
 225         if ((d == wxT('\n')) || (d == wxT('\r')) || (d == wxT(' ')) || (d == wxT('\t')))
 226         {
 227             i++, x++;
 228             while ((i < lng) && ((txt[i] == wxT('\n')) || (txt[i] == wxT('\r')) ||
 229                                  (txt[i] == wxT(' ')) || (txt[i] == wxT('\t')))) i++, x++;
 230         }
 231         else i++;
 232
 233         if (x)
 234         {
 235             temp[templen-1] = wxT(' ');
 236             temp[templen] = 0;
 237             if (templen == 1) continue;
 238             templen = 0;
 239             if (m_EncConv)
 240                 m_EncConv->Convert(temp);
 241             size_t len = wxStrlen(temp);
 242             for (size_t j = 0; j < len; j++)
 243                 if (temp[j] == nbsp)
 244                     temp[j] = wxT(' ');
 245             c = new wxHtmlWordCell(temp, *(GetDC()));
 246             if (m_UseLink)
 247                 c->SetLink(m_Link);
 248             m_Container->InsertCell(c);
 249             m_tmpLastWasSpace = TRUE;
 250         }
 251     }
 252
 253     if (templen && (templen > 1 || temp[0] != wxT(' ')))
 254     {
 255         temp[templen] = 0;
 256         if (m_EncConv)
 257             m_EncConv->Convert(temp);
 258         size_t len = wxStrlen(temp);
 259         for (size_t j = 0; j < len; j++)
 260             if (temp[j] == nbsp)
 261                 temp[j] = wxT(' ');
 262         c = new wxHtmlWordCell(temp, *(GetDC()));
 263         if (m_UseLink)
 264             c->SetLink(m_Link);
 265         m_Container->InsertCell(c);
 266         m_tmpLastWasSpace = FALSE;
 267     }
 268 }
 269
 270
 271
 272 wxHtmlContainerCell* wxHtmlWinParser::OpenContainer()
 273 {
 274     m_Container = new wxHtmlContainerCell(m_Container);
 275     m_Container->SetAlignHor(m_Align);
 276     m_tmpLastWasSpace = TRUE;
 277         /* to avoid space being first character in paragraph */
 278     return m_Container;
 279 }
 280
 281
 282
 283 wxHtmlContainerCell* wxHtmlWinParser::SetContainer(wxHtmlContainerCell *c)
 284 {
 285     m_tmpLastWasSpace = TRUE;
 286         /* to avoid space being first character in paragraph */
 287     return m_Container = c;
 288 }
 289
 290
 291
 292 wxHtmlContainerCell* wxHtmlWinParser::CloseContainer()
 293 {
 294     m_Container = m_Container->GetParent();
 295     return m_Container;
 296 }
 297
 298
 299 void wxHtmlWinParser::SetFontSize(int s)
 300 {
 301     if (s < 1) s = 1;
 302     else if (s > 7) s = 7;
 303     m_FontSize = s;
 304 }
 305
 306
 307
 308 wxFont* wxHtmlWinParser::CreateCurrentFont()
 309 {
 310     int fb = GetFontBold(),
 311         fi = GetFontItalic(),
 312         fu = GetFontUnderlined(),
 313         ff = GetFontFixed(),
 314         fs = GetFontSize() - 1 /*remap from <1;7> to <0;6>*/ ;
 315
 316     wxString face = ff ? m_FontFaceFixed : m_FontFaceNormal;
 317     wxString *faceptr = &(m_FontsFacesTable[fb][fi][fu][ff][fs]);
 318     wxFont **fontptr = &(m_FontsTable[fb][fi][fu][ff][fs]);
 319     wxFontEncoding *encptr = &(m_FontsEncTable[fb][fi][fu][ff][fs]);
 320
 321     if (*fontptr != NULL && (*faceptr != face || *encptr != m_OutputEnc))
 322     {
 323         delete *fontptr;
 324         *fontptr = NULL;
 325     }
 326
 327     if (*fontptr == NULL)
 328     {
 329         *faceptr = face;
 330         *encptr = m_OutputEnc;
 331         *fontptr = new wxFont(
 332                        (int) (m_FontsSizes[fs] * m_PixelScale),
 333                        ff ? wxMODERN : wxSWISS,
 334                        fi ? wxITALIC : wxNORMAL,
 335                        fb ? wxBOLD : wxNORMAL,
 336                        fu ? TRUE : FALSE, face,
 337                        m_OutputEnc);
 338     }
 339     m_DC->SetFont(**fontptr);
 340     return (*fontptr);
 341 }
 342
 343
 344
 345 void wxHtmlWinParser::SetLink(const wxHtmlLinkInfo& link)
 346 {
 347     m_Link = link;
 348     m_UseLink = (link.GetHref() != wxEmptyString);
 349 }
 350
 351
 352 void wxHtmlWinParser::SetFontFace(const wxString& face)
 353 {
 354     if (GetFontFixed()) m_FontFaceFixed = face;
 355     else m_FontFaceNormal = face;
 356
 357     if (m_InputEnc != wxFONTENCODING_DEFAULT)
 358         SetInputEncoding(m_InputEnc);
 359 }
 360
 361
 362
 363 void wxHtmlWinParser::SetInputEncoding(wxFontEncoding enc)
 364 {
 365     m_InputEnc = m_OutputEnc = wxFONTENCODING_DEFAULT;
 366     if (m_EncConv)
 367     {
 368         delete m_EncConv;
 369         m_EncConv = NULL;
 370     }
 371
 372     if (enc == wxFONTENCODING_DEFAULT) return;
 373
 374     wxFontEncoding altfix, altnorm;
 375     bool availfix, availnorm;
 376
 377     // exact match?
 378     availnorm = wxTheFontMapper->IsEncodingAvailable(enc, m_FontFaceNormal);
 379     availfix = wxTheFontMapper->IsEncodingAvailable(enc, m_FontFaceFixed);
 380     if (availnorm && availfix)
 381         m_OutputEnc = enc;
 382
 383     // alternatives?
 384     else if (wxTheFontMapper->GetAltForEncoding(enc, &altnorm, m_FontFaceNormal, FALSE) &&
 385              wxTheFontMapper->GetAltForEncoding(enc, &altfix, m_FontFaceFixed, FALSE) &&
 386              altnorm == altfix)
 387         m_OutputEnc = altnorm;
 388
 389     // at least normal face?
 390     else if (availnorm)
 391         m_OutputEnc = enc;
 392     else if (wxTheFontMapper->GetAltForEncoding(enc, &altnorm, m_FontFaceNormal, FALSE))
 393         m_OutputEnc = altnorm;
 394
 395     // okay, let convert to ISO_8859-1, available always
 396     else
 397         m_OutputEnc = wxFONTENCODING_DEFAULT;
 398
 399     m_InputEnc = enc;
 400     if (m_OutputEnc == wxFONTENCODING_DEFAULT)
 401         GetEntitiesParser()->SetEncoding(wxFONTENCODING_SYSTEM);
 402     else
 403         GetEntitiesParser()->SetEncoding(m_OutputEnc);
 404
 405     if (m_InputEnc == m_OutputEnc) return;
 406
 407     m_EncConv = new wxEncodingConverter();
 408     if (!m_EncConv->Init(m_InputEnc,
 409                            (m_OutputEnc == wxFONTENCODING_DEFAULT) ?
 410                                       wxFONTENCODING_ISO8859_1 : m_OutputEnc,
 411                            wxCONVERT_SUBSTITUTE))
 412     { // total failture :-(
 413         wxLogError(_("Failed to display HTML document in %s encoding"),
 414                    wxFontMapper::GetEncodingName(enc).c_str());
 415         m_InputEnc = m_OutputEnc = wxFONTENCODING_DEFAULT;
 416         delete m_EncConv;
 417         m_EncConv = NULL;
 418     }
 419 }
 420
 421
 422
 423
 424
 425 //-----------------------------------------------------------------------------
 426 // wxHtmlWinTagHandler
 427 //-----------------------------------------------------------------------------
 428
 429 IMPLEMENT_ABSTRACT_CLASS(wxHtmlWinTagHandler, wxHtmlTagHandler)
 430
 431
 432
 433 //-----------------------------------------------------------------------------
 434 // wxHtmlTagsModule
 435 //-----------------------------------------------------------------------------
 436
 437
 438 IMPLEMENT_DYNAMIC_CLASS(wxHtmlTagsModule, wxModule)
 439
 440
 441 bool wxHtmlTagsModule::OnInit()
 442 {
 443     wxHtmlWinParser::AddModule(this);
 444     return TRUE;
 445 }
 446
 447
 448
 449 void wxHtmlTagsModule::OnExit()
 450 {
 451     wxHtmlWinParser::RemoveModule(this);
 452 }
 453 #endif
 454