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
  19
  20 #ifdef __BORDLANDC__
  21 #pragma hdrstop
  22 #endif
  23
  24 #ifndef WXPRECOMP
  25 #include "wx/wx.h"
  26 #endif
  27
  28 #include "wx/html/htmldefs.h"
  29 #include "wx/html/winpars.h"
  30 #include "wx/html/htmlwin.h"
  31 #include "wx/fontmap.h"
  32 #include "wx/log.h"
  33
  34
  35 //-----------------------------------------------------------------------------
  36 // wxHtmlWinParser
  37 //-----------------------------------------------------------------------------
  38
  39
  40 wxList wxHtmlWinParser::m_Modules;
  41
  42 wxHtmlWinParser::wxHtmlWinParser(wxWindow *wnd) : wxHtmlParser()
  43 {
  44     m_Window = wnd;
  45     m_Container = NULL;
  46     m_DC = NULL;
  47     m_CharHeight = m_CharWidth = 0;
  48     m_UseLink = FALSE;
  49     m_EncConv = NULL;
  50     m_InputEnc = m_OutputEnc = wxFONTENCODING_DEFAULT;
  51
  52     {
  53         int i, j, k, l, m;
  54         for (i = 0; i < 2; i++)
  55             for (j = 0; j < 2; j++)
  56                 for (k = 0; k < 2; k++)
  57                     for (l = 0; l < 2; l++)
  58                         for (m = 0; m < 7; m++) {
  59                             m_FontsTable[i][j][k][l][m] = NULL;
  60                             m_FontsFacesTable[i][j][k][l][m] = wxEmptyString;
  61                             m_FontsEncTable[i][j][k][l][m] = wxFONTENCODING_DEFAULT;
  62                         }
  63 #ifdef __WXMSW__
  64         static int default_sizes[7] = {7, 8, 10, 12, 16, 22, 30};
  65 #elif defined(__WXMAC__)
  66         static int default_sizes[7] = {9, 12, 14, 18, 24, 30, 36};
  67 #else
  68         static int default_sizes[7] = {10, 12, 14, 16, 19, 24, 32};
  69 #endif
  70         SetFonts("", "", default_sizes);
  71     }
  72
  73     // fill in wxHtmlParser's tables:
  74     wxNode *node = m_Modules.GetFirst();
  75     while (node) {
  76         wxHtmlTagsModule *mod = (wxHtmlTagsModule*) node -> GetData();
  77         mod -> FillHandlersTable(this);
  78         node = node -> GetNext();
  79     }
  80 }
  81
  82
  83 wxHtmlWinParser::~wxHtmlWinParser()
  84 {
  85     int i, j, k, l, m;
  86
  87     for (i = 0; i < 2; i++)
  88         for (j = 0; j < 2; j++)
  89             for (k = 0; k < 2; k++)
  90                 for (l = 0; l < 2; l++)
  91                     for (m = 0; m < 7; m++) {
  92                         if (m_FontsTable[i][j][k][l][m] != NULL)
  93                             delete m_FontsTable[i][j][k][l][m];
  94                     }
  95     if (m_EncConv) delete m_EncConv;
  96 }
  97
  98
  99 void wxHtmlWinParser::AddModule(wxHtmlTagsModule *module)
 100 {
 101     m_Modules.Append(module);
 102 }
 103
 104
 105
 106 void wxHtmlWinParser::SetFonts(wxString normal_face, wxString fixed_face, const int *sizes)
 107 {
 108     int i, j, k, l, m;
 109
 110     for (i = 0; i < 7; i++) m_FontsSizes[i] = sizes[i];
 111     m_FontFaceFixed = fixed_face;
 112     m_FontFaceNormal = normal_face;
 113
 114     SetInputEncoding(m_InputEnc);
 115
 116     for (i = 0; i < 2; i++)
 117         for (j = 0; j < 2; j++)
 118             for (k = 0; k < 2; k++)
 119                 for (l = 0; l < 2; l++)
 120                     for (m = 0; m < 7; m++) {
 121                         if (m_FontsTable[i][j][k][l][m] != NULL) {
 122                             delete m_FontsTable[i][j][k][l][m];
 123                             m_FontsTable[i][j][k][l][m] = NULL;
 124                         }
 125                     }
 126 }
 127
 128
 129
 130 void wxHtmlWinParser::InitParser(const wxString& source)
 131 {
 132     wxHtmlParser::InitParser(source);
 133     wxASSERT_MSG(m_DC != NULL, _T("no DC assigned to wxHtmlWinParser!!"));
 134
 135     m_FontBold = m_FontItalic = m_FontUnderlined = m_FontFixed = FALSE;
 136     m_FontSize = 3; //default one
 137     CreateCurrentFont();           // we're selecting default font into
 138     m_DC -> GetTextExtent("H", &m_CharWidth, &m_CharHeight);
 139                 /* NOTE : we're not using GetCharWidth/Height() because
 140                    of differences under X and win
 141                  */
 142
 143     m_UseLink = FALSE;
 144     m_Link = wxHtmlLinkInfo("", "");
 145     m_LinkColor.Set(0, 0, 0xFF);
 146     m_ActualColor.Set(0, 0, 0);
 147     m_Align = wxHTML_ALIGN_LEFT;
 148     m_tmpLastWasSpace = FALSE;
 149
 150     OpenContainer();
 151
 152     OpenContainer();
 153     m_Container -> InsertCell(new wxHtmlColourCell(m_ActualColor));
 154     m_Container -> InsertCell(new wxHtmlFontCell(CreateCurrentFont()));
 155 }
 156
 157
 158
 159 void wxHtmlWinParser::DoneParser()
 160 {
 161     m_Container = NULL;
 162     SetInputEncoding(wxFONTENCODING_DEFAULT); // for next call
 163     wxHtmlParser::DoneParser();
 164 }
 165
 166
 167
 168 wxObject* wxHtmlWinParser::GetProduct()
 169 {
 170     wxHtmlContainerCell *top;
 171
 172     CloseContainer();
 173     OpenContainer();
 174
 175     top = m_Container;
 176     while (top -> GetParent()) top = top -> GetParent();
 177     return top;
 178 }
 179
 180
 181
 182 void wxHtmlWinParser::AddText(const char* txt)
 183 {
 184     wxHtmlCell *c;
 185     int i = 0, x, lng = strlen(txt);
 186     char temp[wxHTML_BUFLEN];
 187     register char d;
 188     int templen = 0;
 189
 190     if (m_tmpLastWasSpace) {
 191         while ((i < lng) && ((txt[i] == '\n') || (txt[i] == '\r') || (txt[i] == ' ') || (txt[i] == '\t'))) i++;
 192     }
 193
 194     while (i < lng) {
 195         x = 0;
 196         d = temp[templen++] = txt[i];
 197         if ((d == '\n') || (d == '\r') || (d == ' ') || (d == '\t')) {
 198             i++, x++;
 199             while ((i < lng) && ((txt[i] == '\n') || (txt[i] == '\r') || (txt[i] == ' ') || (txt[i] == '\t'))) i++, x++;
 200         }
 201         else i++;
 202
 203         if (x) {
 204             temp[templen-1] = ' ';
 205             temp[templen] = 0;
 206             templen = 0;
 207             if (m_EncConv) m_EncConv -> Convert(temp);
 208             c = new wxHtmlWordCell(temp, *(GetDC()));
 209             if (m_UseLink) c -> SetLink(m_Link);
 210             m_Container -> InsertCell(c);
 211             m_tmpLastWasSpace = TRUE;
 212         }
 213     }
 214     if (templen) {
 215         temp[templen] = 0;
 216         if (m_EncConv) m_EncConv -> Convert(temp);
 217         c = new wxHtmlWordCell(temp, *(GetDC()));
 218         if (m_UseLink) c -> SetLink(m_Link);
 219         m_Container -> InsertCell(c);
 220         m_tmpLastWasSpace = FALSE;
 221     }
 222 }
 223
 224
 225
 226 wxHtmlContainerCell* wxHtmlWinParser::OpenContainer()
 227 {
 228     m_Container = new wxHtmlContainerCell(m_Container);
 229     m_Container -> SetAlignHor(m_Align);
 230     m_tmpLastWasSpace = TRUE;
 231         /* to avoid space being first character in paragraph */
 232     return m_Container;
 233 }
 234
 235
 236
 237 wxHtmlContainerCell* wxHtmlWinParser::SetContainer(wxHtmlContainerCell *c)
 238 {
 239     m_tmpLastWasSpace = TRUE;
 240         /* to avoid space being first character in paragraph */
 241     return m_Container = c;
 242 }
 243
 244
 245
 246 wxHtmlContainerCell* wxHtmlWinParser::CloseContainer()
 247 {
 248     m_Container = m_Container -> GetParent();
 249     return m_Container;
 250 }
 251
 252
 253 void wxHtmlWinParser::SetFontSize(int s)
 254 {
 255     if (s < 1) s = 1;
 256     else if (s > 7) s = 7;
 257     m_FontSize = s;
 258 }
 259
 260
 261
 262 wxFont* wxHtmlWinParser::CreateCurrentFont()
 263 {
 264     int fb = GetFontBold(),
 265         fi = GetFontItalic(),
 266         fu = GetFontUnderlined(),
 267         ff = GetFontFixed(),
 268         fs = GetFontSize() - 1 /*remap from <1;7> to <0;6>*/ ;
 269
 270     wxString face = ff ? m_FontFaceFixed : m_FontFaceNormal;
 271     wxString *faceptr = &(m_FontsFacesTable[fb][fi][fu][ff][fs]);
 272     wxFont **fontptr = &(m_FontsTable[fb][fi][fu][ff][fs]);
 273     wxFontEncoding *encptr = &(m_FontsEncTable[fb][fi][fu][ff][fs]);
 274
 275     if (*fontptr != NULL && (*faceptr != face || *encptr != m_OutputEnc)) {
 276         delete *fontptr;
 277         *fontptr = NULL;
 278     }
 279
 280     if (*fontptr == NULL) {
 281         *faceptr = face;
 282         *encptr = m_OutputEnc;
 283         *fontptr = new wxFont(
 284                        m_FontsSizes[fs] * m_PixelScale,
 285                        ff ? wxMODERN : wxSWISS,
 286                        fi ? wxITALIC : wxNORMAL,
 287                        fb ? wxBOLD : wxNORMAL,
 288                        fu ? TRUE : FALSE, face,
 289                        m_OutputEnc);
 290     }
 291     m_DC -> SetFont(**fontptr);
 292     return (*fontptr);
 293 }
 294
 295
 296
 297 void wxHtmlWinParser::SetLink(const wxHtmlLinkInfo& link)
 298 {
 299     m_Link = link;
 300     m_UseLink = (link.GetHref() != wxEmptyString);
 301 }
 302
 303
 304 void wxHtmlWinParser::SetFontFace(const wxString& face)
 305 {
 306     if (GetFontFixed()) m_FontFaceFixed = face;
 307     else m_FontFaceNormal = face;
 308
 309     if (m_InputEnc != wxFONTENCODING_DEFAULT)
 310         SetInputEncoding(m_InputEnc);
 311 }
 312
 313
 314
 315 void wxHtmlWinParser::SetInputEncoding(wxFontEncoding enc)
 316 {
 317     m_InputEnc = m_OutputEnc = wxFONTENCODING_DEFAULT;
 318     if (m_EncConv) {delete m_EncConv; m_EncConv = NULL;}
 319
 320     if (enc == wxFONTENCODING_DEFAULT) return;
 321
 322     wxFontEncoding altfix, altnorm;
 323     bool availfix, availnorm;
 324
 325     // exact match?
 326     availnorm = wxTheFontMapper -> IsEncodingAvailable(enc, m_FontFaceNormal);
 327     availfix = wxTheFontMapper -> IsEncodingAvailable(enc, m_FontFaceFixed);
 328     if (availnorm && availfix)
 329         m_OutputEnc = enc;
 330
 331     // alternatives?
 332     else if (wxTheFontMapper -> GetAltForEncoding(enc, &altnorm, m_FontFaceNormal, FALSE) &&
 333              wxTheFontMapper -> GetAltForEncoding(enc, &altfix, m_FontFaceFixed, FALSE) &&
 334              altnorm == altfix)
 335         m_OutputEnc = altnorm;
 336
 337     // at least normal face?
 338     else if (availnorm)
 339         m_OutputEnc = enc;
 340     else if (wxTheFontMapper -> GetAltForEncoding(enc, &altnorm, m_FontFaceNormal, FALSE))
 341         m_OutputEnc = altnorm;
 342
 343     // okay, let convert to ISO_8859-1, available always
 344     else
 345         m_OutputEnc = wxFONTENCODING_DEFAULT;
 346
 347     m_InputEnc = enc;
 348
 349     if (m_InputEnc == m_OutputEnc) return;
 350
 351     m_EncConv = new wxEncodingConverter();
 352     if (!m_EncConv -> Init(m_InputEnc,
 353                            (m_OutputEnc == wxFONTENCODING_DEFAULT) ?
 354                                       wxFONTENCODING_ISO8859_1 : m_OutputEnc,
 355                            wxCONVERT_SUBSTITUTE))
 356     { // total failture :-(
 357         wxLogError(_("Failed to display HTML document in %s encoding"),
 358                    wxFontMapper::GetEncodingName(enc).mb_str());
 359         m_InputEnc = m_OutputEnc = wxFONTENCODING_DEFAULT;
 360         delete m_EncConv;
 361         m_EncConv = NULL;
 362     }
 363 }
 364
 365
 366
 367
 368
 369 //-----------------------------------------------------------------------------
 370 // wxHtmlWinTagHandler
 371 //-----------------------------------------------------------------------------
 372
 373 IMPLEMENT_ABSTRACT_CLASS(wxHtmlWinTagHandler, wxHtmlTagHandler)
 374
 375
 376
 377 //-----------------------------------------------------------------------------
 378 // wxHtmlTagsModule
 379 //-----------------------------------------------------------------------------
 380
 381
 382 IMPLEMENT_DYNAMIC_CLASS(wxHtmlTagsModule, wxModule)
 383
 384
 385 bool wxHtmlTagsModule::OnInit()
 386 {
 387     wxHtmlWinParser::AddModule(this);
 388     return TRUE;
 389 }
 390
 391
 392
 393 void wxHtmlTagsModule::OnExit()
 394 {
 395 }
 396 #endif
 397