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     int i = 0, x, lng = wxStrlen(txt);
 200     register wxChar d;
 201     int templen = 0;
 202
 203     if (lng+1 > m_tmpStrBufSize)
 204     {
 205         delete[] m_tmpStrBuf;
 206         m_tmpStrBuf = new wxChar[lng+1];
 207         m_tmpStrBufSize = lng+1;
 208     }
 209     wxChar *temp = m_tmpStrBuf;
 210
 211     if (m_tmpLastWasSpace)
 212     {
 213         while ((i < lng) &&
 214                ((txt[i] == wxT('\n')) || (txt[i] == wxT('\r')) || (txt[i] == wxT(' ')) ||
 215                 (txt[i] == wxT('\t')))) i++;
 216     }
 217
 218     while (i < lng)
 219     {
 220         x = 0;
 221         d = temp[templen++] = txt[i];
 222         if ((d == wxT('\n')) || (d == wxT('\r')) || (d == wxT(' ')) || (d == wxT('\t')))
 223             {
 224             i++, x++;
 225             while ((i < lng) && ((txt[i] == wxT('\n')) || (txt[i] == wxT('\r')) ||
 226                                  (txt[i] == wxT(' ')) || (txt[i] == wxT('\t')))) i++, x++;
 227         }
 228         else i++;
 229
 230         if (x)
 231             {
 232             temp[templen-1] = wxT(' ');
 233             temp[templen] = 0;
 234             templen = 0;
 235             if (m_EncConv)
 236                 m_EncConv->Convert(temp);
 237             c = new wxHtmlWordCell(GetEntitiesParser()->Parse(temp), *(GetDC()));
 238             if (m_UseLink)
 239                 c->SetLink(m_Link);
 240             m_Container->InsertCell(c);
 241             m_tmpLastWasSpace = TRUE;
 242         }
 243     }
 244     if (templen)
 245     {
 246         temp[templen] = 0;
 247         if (m_EncConv)
 248             m_EncConv->Convert(temp);
 249         c = new wxHtmlWordCell(GetEntitiesParser()->Parse(temp), *(GetDC()));
 250         if (m_UseLink)
 251             c->SetLink(m_Link);
 252         m_Container->InsertCell(c);
 253         m_tmpLastWasSpace = FALSE;
 254     }
 255 }
 256
 257
 258
 259 wxHtmlContainerCell* wxHtmlWinParser::OpenContainer()
 260 {
 261     m_Container = new wxHtmlContainerCell(m_Container);
 262     m_Container->SetAlignHor(m_Align);
 263     m_tmpLastWasSpace = TRUE;
 264         /* to avoid space being first character in paragraph */
 265     return m_Container;
 266 }
 267
 268
 269
 270 wxHtmlContainerCell* wxHtmlWinParser::SetContainer(wxHtmlContainerCell *c)
 271 {
 272     m_tmpLastWasSpace = TRUE;
 273         /* to avoid space being first character in paragraph */
 274     return m_Container = c;
 275 }
 276
 277
 278
 279 wxHtmlContainerCell* wxHtmlWinParser::CloseContainer()
 280 {
 281     m_Container = m_Container->GetParent();
 282     return m_Container;
 283 }
 284
 285
 286 void wxHtmlWinParser::SetFontSize(int s)
 287 {
 288     if (s < 1) s = 1;
 289     else if (s > 7) s = 7;
 290     m_FontSize = s;
 291 }
 292
 293
 294
 295 wxFont* wxHtmlWinParser::CreateCurrentFont()
 296 {
 297     int fb = GetFontBold(),
 298         fi = GetFontItalic(),
 299         fu = GetFontUnderlined(),
 300         ff = GetFontFixed(),
 301         fs = GetFontSize() - 1 /*remap from <1;7> to <0;6>*/ ;
 302
 303     wxString face = ff ? m_FontFaceFixed : m_FontFaceNormal;
 304     wxString *faceptr = &(m_FontsFacesTable[fb][fi][fu][ff][fs]);
 305     wxFont **fontptr = &(m_FontsTable[fb][fi][fu][ff][fs]);
 306     wxFontEncoding *encptr = &(m_FontsEncTable[fb][fi][fu][ff][fs]);
 307
 308     if (*fontptr != NULL && (*faceptr != face || *encptr != m_OutputEnc))
 309     {
 310         delete *fontptr;
 311         *fontptr = NULL;
 312     }
 313
 314     if (*fontptr == NULL)
 315     {
 316         *faceptr = face;
 317         *encptr = m_OutputEnc;
 318         *fontptr = new wxFont(
 319                        (int) (m_FontsSizes[fs] * m_PixelScale),
 320                        ff ? wxMODERN : wxSWISS,
 321                        fi ? wxITALIC : wxNORMAL,
 322                        fb ? wxBOLD : wxNORMAL,
 323                        fu ? TRUE : FALSE, face,
 324                        m_OutputEnc);
 325     }
 326     m_DC->SetFont(**fontptr);
 327     return (*fontptr);
 328 }
 329
 330
 331
 332 void wxHtmlWinParser::SetLink(const wxHtmlLinkInfo& link)
 333 {
 334     m_Link = link;
 335     m_UseLink = (link.GetHref() != wxEmptyString);
 336 }
 337
 338
 339 void wxHtmlWinParser::SetFontFace(const wxString& face)
 340 {
 341     if (GetFontFixed()) m_FontFaceFixed = face;
 342     else m_FontFaceNormal = face;
 343
 344     if (m_InputEnc != wxFONTENCODING_DEFAULT)
 345         SetInputEncoding(m_InputEnc);
 346 }
 347
 348
 349
 350 void wxHtmlWinParser::SetInputEncoding(wxFontEncoding enc)
 351 {
 352     m_InputEnc = m_OutputEnc = wxFONTENCODING_DEFAULT;
 353     if (m_EncConv)
 354     {
 355         delete m_EncConv;
 356         m_EncConv = NULL;
 357     }
 358
 359     if (enc == wxFONTENCODING_DEFAULT) return;
 360
 361     wxFontEncoding altfix, altnorm;
 362     bool availfix, availnorm;
 363
 364     // exact match?
 365     availnorm = wxTheFontMapper->IsEncodingAvailable(enc, m_FontFaceNormal);
 366     availfix = wxTheFontMapper->IsEncodingAvailable(enc, m_FontFaceFixed);
 367     if (availnorm && availfix)
 368         m_OutputEnc = enc;
 369
 370     // alternatives?
 371     else if (wxTheFontMapper->GetAltForEncoding(enc, &altnorm, m_FontFaceNormal, FALSE) &&
 372              wxTheFontMapper->GetAltForEncoding(enc, &altfix, m_FontFaceFixed, FALSE) &&
 373              altnorm == altfix)
 374         m_OutputEnc = altnorm;
 375
 376     // at least normal face?
 377     else if (availnorm)
 378         m_OutputEnc = enc;
 379     else if (wxTheFontMapper->GetAltForEncoding(enc, &altnorm, m_FontFaceNormal, FALSE))
 380         m_OutputEnc = altnorm;
 381
 382     // okay, let convert to ISO_8859-1, available always
 383     else
 384         m_OutputEnc = wxFONTENCODING_DEFAULT;
 385
 386     m_InputEnc = enc;
 387     if (m_OutputEnc == wxFONTENCODING_DEFAULT)
 388         GetEntitiesParser()->SetEncoding(wxFONTENCODING_SYSTEM);
 389     else
 390         GetEntitiesParser()->SetEncoding(m_OutputEnc);
 391
 392     if (m_InputEnc == m_OutputEnc) return;
 393
 394     m_EncConv = new wxEncodingConverter();
 395     if (!m_EncConv->Init(m_InputEnc,
 396                            (m_OutputEnc == wxFONTENCODING_DEFAULT) ?
 397                                       wxFONTENCODING_ISO8859_1 : m_OutputEnc,
 398                            wxCONVERT_SUBSTITUTE))
 399     { // total failture :-(
 400         wxLogError(_("Failed to display HTML document in %s encoding"),
 401                    wxFontMapper::GetEncodingName(enc).c_str());
 402         m_InputEnc = m_OutputEnc = wxFONTENCODING_DEFAULT;
 403         delete m_EncConv;
 404         m_EncConv = NULL;
 405     }
 406 }
 407
 408
 409
 410
 411
 412 //-----------------------------------------------------------------------------
 413 // wxHtmlWinTagHandler
 414 //-----------------------------------------------------------------------------
 415
 416 IMPLEMENT_ABSTRACT_CLASS(wxHtmlWinTagHandler, wxHtmlTagHandler)
 417
 418
 419
 420 //-----------------------------------------------------------------------------
 421 // wxHtmlTagsModule
 422 //-----------------------------------------------------------------------------
 423
 424
 425 IMPLEMENT_DYNAMIC_CLASS(wxHtmlTagsModule, wxModule)
 426
 427
 428 bool wxHtmlTagsModule::OnInit()
 429 {
 430     wxHtmlWinParser::AddModule(this);
 431     return TRUE;
 432 }
 433
 434
 435
 436 void wxHtmlTagsModule::OnExit()
 437 {
 438     wxHtmlWinParser::RemoveModule(this);
 439 }
 440 #endif
 441