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(wxHtmlWindow *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 wxHtmlWinParser::~wxHtmlWinParser()
  88 {
  89     int i, j, k, l, m;
  90
  91     for (i = 0; i < 2; i++)
  92         for (j = 0; j < 2; j++)
  93             for (k = 0; k < 2; k++)
  94                 for (l = 0; l < 2; l++)
  95                     for (m = 0; m < 7; m++)
  96                     {
  97                         if (m_FontsTable[i][j][k][l][m] != NULL)
  98                             delete m_FontsTable[i][j][k][l][m];
  99                     }
 100     delete m_EncConv;
 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(wxString normal_face, wxString fixed_face, const int *sizes)
 115 {
 116     int i, j, k, l, m;
 117
 118     for (i = 0; i < 7; i++) m_FontsSizes[i] = sizes[i];
 119     m_FontFaceFixed = fixed_face;
 120     m_FontFaceNormal = normal_face;
 121
 122     SetInputEncoding(m_InputEnc);
 123
 124     for (i = 0; i < 2; i++)
 125         for (j = 0; j < 2; j++)
 126             for (k = 0; k < 2; k++)
 127                 for (l = 0; l < 2; l++)
 128                     for (m = 0; m < 7; m++) {
 129                         if (m_FontsTable[i][j][k][l][m] != NULL)
 130                         {
 131                             delete m_FontsTable[i][j][k][l][m];
 132                             m_FontsTable[i][j][k][l][m] = NULL;
 133                         }
 134                     }
 135 }
 136
 137 void wxHtmlWinParser::InitParser(const wxString& source)
 138 {
 139     wxHtmlParser::InitParser(source);
 140     wxASSERT_MSG(m_DC != NULL, _T("no DC assigned to wxHtmlWinParser!!"));
 141
 142     m_FontBold = m_FontItalic = m_FontUnderlined = m_FontFixed = FALSE;
 143     m_FontSize = 3; //default one
 144     CreateCurrentFont();           // we're selecting default font into
 145     m_DC->GetTextExtent("H", &m_CharWidth, &m_CharHeight);
 146                 /* NOTE : we're not using GetCharWidth/Height() because
 147                    of differences under X and win
 148                  */
 149
 150     m_UseLink = FALSE;
 151     m_Link = wxHtmlLinkInfo("", "");
 152     m_LinkColor.Set(0, 0, 0xFF);
 153     m_ActualColor.Set(0, 0, 0);
 154     m_Align = wxHTML_ALIGN_LEFT;
 155     m_tmpLastWasSpace = FALSE;
 156
 157     OpenContainer();
 158
 159     OpenContainer();
 160     m_Container->InsertCell(new wxHtmlColourCell(m_ActualColor));
 161     m_Container->InsertCell(new wxHtmlFontCell(CreateCurrentFont()));
 162 }
 163
 164 void wxHtmlWinParser::DoneParser()
 165 {
 166     m_Container = NULL;
 167     SetInputEncoding(wxFONTENCODING_DEFAULT); // for next call
 168     wxHtmlParser::DoneParser();
 169 }
 170
 171 wxObject* wxHtmlWinParser::GetProduct()
 172 {
 173     wxHtmlContainerCell *top;
 174
 175     CloseContainer();
 176     OpenContainer();
 177
 178     top = m_Container;
 179     while (top->GetParent()) top = top->GetParent();
 180     return top;
 181 }
 182
 183 wxFSFile *wxHtmlWinParser::OpenURL(wxHtmlURLType type,
 184                                    const wxString& url) const
 185 {
 186     // FIXME - normalize the URL to full path before passing to
 187     //         OnOpeningURL!!
 188     if ( m_Window )
 189     {
 190         wxString redirect;
 191         wxString myurl(url);
 192         wxHtmlOpeningStatus status;
 193         for (;;)
 194         {
 195             if ( m_Window->OnOpeningURL(type, myurl, &redirect) == wxHTML_REDIRECT )
 196                 myurl = redirect;
 197             else
 198                 break;
 199         }
 200
 201         if ( status == wxHTML_BLOCK )
 202             return NULL;
 203         else
 204             return GetFS()->OpenFile(myurl);
 205     }
 206     else
 207         return wxHtmlParser::OpenURL(type, url);
 208 }
 209
 210 void wxHtmlWinParser::AddText(const wxChar* txt)
 211 {
 212     wxHtmlCell *c;
 213     size_t i = 0,
 214            x,
 215            lng = wxStrlen(txt);
 216     register wxChar d;
 217     int templen = 0;
 218     wxChar nbsp = GetEntitiesParser()->GetCharForCode(160 /* nbsp */);
 219
 220     if (lng+1 > m_tmpStrBufSize)
 221     {
 222         delete[] m_tmpStrBuf;
 223         m_tmpStrBuf = new wxChar[lng+1];
 224         m_tmpStrBufSize = lng+1;
 225     }
 226     wxChar *temp = m_tmpStrBuf;
 227
 228     if (m_tmpLastWasSpace)
 229     {
 230         while ((i < lng) &&
 231                ((txt[i] == wxT('\n')) || (txt[i] == wxT('\r')) || (txt[i] == wxT(' ')) ||
 232                 (txt[i] == wxT('\t')))) i++;
 233     }
 234
 235     while (i < lng)
 236     {
 237         x = 0;
 238         d = temp[templen++] = txt[i];
 239         if ((d == wxT('\n')) || (d == wxT('\r')) || (d == wxT(' ')) || (d == wxT('\t')))
 240         {
 241             i++, x++;
 242             while ((i < lng) && ((txt[i] == wxT('\n')) || (txt[i] == wxT('\r')) ||
 243                                  (txt[i] == wxT(' ')) || (txt[i] == wxT('\t')))) i++, x++;
 244         }
 245         else i++;
 246
 247         if (x)
 248         {
 249             temp[templen-1] = wxT(' ');
 250             temp[templen] = 0;
 251             if (templen == 1) continue;
 252             templen = 0;
 253             if (m_EncConv)
 254                 m_EncConv->Convert(temp);
 255             size_t len = wxStrlen(temp);
 256             for (size_t j = 0; j < len; j++)
 257                 if (temp[j] == nbsp)
 258                     temp[j] = wxT(' ');
 259             c = new wxHtmlWordCell(temp, *(GetDC()));
 260             if (m_UseLink)
 261                 c->SetLink(m_Link);
 262             m_Container->InsertCell(c);
 263             m_tmpLastWasSpace = TRUE;
 264         }
 265     }
 266
 267     if (templen && (templen > 1 || temp[0] != wxT(' ')))
 268     {
 269         temp[templen] = 0;
 270         if (m_EncConv)
 271             m_EncConv->Convert(temp);
 272         size_t len = wxStrlen(temp);
 273         for (size_t j = 0; j < len; j++)
 274             if (temp[j] == nbsp)
 275                 temp[j] = wxT(' ');
 276         c = new wxHtmlWordCell(temp, *(GetDC()));
 277         if (m_UseLink)
 278             c->SetLink(m_Link);
 279         m_Container->InsertCell(c);
 280         m_tmpLastWasSpace = FALSE;
 281     }
 282 }
 283
 284
 285
 286 wxHtmlContainerCell* wxHtmlWinParser::OpenContainer()
 287 {
 288     m_Container = new wxHtmlContainerCell(m_Container);
 289     m_Container->SetAlignHor(m_Align);
 290     m_tmpLastWasSpace = TRUE;
 291         /* to avoid space being first character in paragraph */
 292     return m_Container;
 293 }
 294
 295
 296
 297 wxHtmlContainerCell* wxHtmlWinParser::SetContainer(wxHtmlContainerCell *c)
 298 {
 299     m_tmpLastWasSpace = TRUE;
 300         /* to avoid space being first character in paragraph */
 301     return m_Container = c;
 302 }
 303
 304
 305
 306 wxHtmlContainerCell* wxHtmlWinParser::CloseContainer()
 307 {
 308     m_Container = m_Container->GetParent();
 309     return m_Container;
 310 }
 311
 312
 313 void wxHtmlWinParser::SetFontSize(int s)
 314 {
 315     if (s < 1) s = 1;
 316     else if (s > 7) s = 7;
 317     m_FontSize = s;
 318 }
 319
 320
 321
 322 wxFont* wxHtmlWinParser::CreateCurrentFont()
 323 {
 324     int fb = GetFontBold(),
 325         fi = GetFontItalic(),
 326         fu = GetFontUnderlined(),
 327         ff = GetFontFixed(),
 328         fs = GetFontSize() - 1 /*remap from <1;7> to <0;6>*/ ;
 329
 330     wxString face = ff ? m_FontFaceFixed : m_FontFaceNormal;
 331     wxString *faceptr = &(m_FontsFacesTable[fb][fi][fu][ff][fs]);
 332     wxFont **fontptr = &(m_FontsTable[fb][fi][fu][ff][fs]);
 333     wxFontEncoding *encptr = &(m_FontsEncTable[fb][fi][fu][ff][fs]);
 334
 335     if (*fontptr != NULL && (*faceptr != face || *encptr != m_OutputEnc))
 336     {
 337         delete *fontptr;
 338         *fontptr = NULL;
 339     }
 340
 341     if (*fontptr == NULL)
 342     {
 343         *faceptr = face;
 344         *encptr = m_OutputEnc;
 345         *fontptr = new wxFont(
 346                        (int) (m_FontsSizes[fs] * m_PixelScale),
 347                        ff ? wxMODERN : wxSWISS,
 348                        fi ? wxITALIC : wxNORMAL,
 349                        fb ? wxBOLD : wxNORMAL,
 350                        fu ? TRUE : FALSE, face,
 351                        m_OutputEnc);
 352     }
 353     m_DC->SetFont(**fontptr);
 354     return (*fontptr);
 355 }
 356
 357
 358
 359 void wxHtmlWinParser::SetLink(const wxHtmlLinkInfo& link)
 360 {
 361     m_Link = link;
 362     m_UseLink = (link.GetHref() != wxEmptyString);
 363 }
 364
 365
 366 void wxHtmlWinParser::SetFontFace(const wxString& face)
 367 {
 368     if (GetFontFixed()) m_FontFaceFixed = face;
 369     else m_FontFaceNormal = face;
 370
 371     if (m_InputEnc != wxFONTENCODING_DEFAULT)
 372         SetInputEncoding(m_InputEnc);
 373 }
 374
 375
 376
 377 void wxHtmlWinParser::SetInputEncoding(wxFontEncoding enc)
 378 {
 379     m_InputEnc = m_OutputEnc = wxFONTENCODING_DEFAULT;
 380     if (m_EncConv)
 381     {
 382         delete m_EncConv;
 383         m_EncConv = NULL;
 384     }
 385
 386     if (enc == wxFONTENCODING_DEFAULT) return;
 387
 388     wxFontEncoding altfix, altnorm;
 389     bool availfix, availnorm;
 390
 391     // exact match?
 392     availnorm = wxTheFontMapper->IsEncodingAvailable(enc, m_FontFaceNormal);
 393     availfix = wxTheFontMapper->IsEncodingAvailable(enc, m_FontFaceFixed);
 394     if (availnorm && availfix)
 395         m_OutputEnc = enc;
 396
 397     // alternatives?
 398     else if (wxTheFontMapper->GetAltForEncoding(enc, &altnorm, m_FontFaceNormal, FALSE) &&
 399              wxTheFontMapper->GetAltForEncoding(enc, &altfix, m_FontFaceFixed, FALSE) &&
 400              altnorm == altfix)
 401         m_OutputEnc = altnorm;
 402
 403     // at least normal face?
 404     else if (availnorm)
 405         m_OutputEnc = enc;
 406     else if (wxTheFontMapper->GetAltForEncoding(enc, &altnorm, m_FontFaceNormal, FALSE))
 407         m_OutputEnc = altnorm;
 408
 409     // okay, let convert to ISO_8859-1, available always
 410     else
 411         m_OutputEnc = wxFONTENCODING_DEFAULT;
 412
 413     m_InputEnc = enc;
 414     if (m_OutputEnc == wxFONTENCODING_DEFAULT)
 415         GetEntitiesParser()->SetEncoding(wxFONTENCODING_SYSTEM);
 416     else
 417         GetEntitiesParser()->SetEncoding(m_OutputEnc);
 418
 419     if (m_InputEnc == m_OutputEnc) return;
 420
 421     m_EncConv = new wxEncodingConverter();
 422     if (!m_EncConv->Init(m_InputEnc,
 423                            (m_OutputEnc == wxFONTENCODING_DEFAULT) ?
 424                                       wxFONTENCODING_ISO8859_1 : m_OutputEnc,
 425                            wxCONVERT_SUBSTITUTE))
 426     { // total failture :-(
 427         wxLogError(_("Failed to display HTML document in %s encoding"),
 428                    wxFontMapper::GetEncodingName(enc).c_str());
 429         m_InputEnc = m_OutputEnc = wxFONTENCODING_DEFAULT;
 430         delete m_EncConv;
 431         m_EncConv = NULL;
 432     }
 433 }
 434
 435
 436
 437
 438
 439 //-----------------------------------------------------------------------------
 440 // wxHtmlWinTagHandler
 441 //-----------------------------------------------------------------------------
 442
 443 IMPLEMENT_ABSTRACT_CLASS(wxHtmlWinTagHandler, wxHtmlTagHandler)
 444
 445
 446
 447 //-----------------------------------------------------------------------------
 448 // wxHtmlTagsModule
 449 //-----------------------------------------------------------------------------
 450
 451
 452 IMPLEMENT_DYNAMIC_CLASS(wxHtmlTagsModule, wxModule)
 453
 454
 455 bool wxHtmlTagsModule::OnInit()
 456 {
 457     wxHtmlWinParser::AddModule(this);
 458     return TRUE;
 459 }
 460
 461
 462
 463 void wxHtmlTagsModule::OnExit()
 464 {
 465     wxHtmlWinParser::RemoveModule(this);
 466 }
 467 #endif
 468