src/html/htmlcell.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        htmlcell.cpp
   3 // Purpose:     wxHtmlCell - basic element of HTML output
   4 // Author:      Vaclav Slavik
   5 // RCS-ID:      $Id$
   6 // Copyright:   (c) 1999 Vaclav Slavik
   7 // Licence:     wxWindows Licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 #ifdef __GNUG__
  11 #pragma implementation "htmlcell.h"
  12 #endif
  13
  14 #include "wx/wxprec.h"
  15
  16 #include "wx/defs.h"
  17
  18 #if wxUSE_HTML && wxUSE_STREAMS
  19
  20 #ifdef __BORLANDC__
  21 #pragma hdrstop
  22 #endif
  23
  24 #ifndef WXPRECOMP
  25     #include "wx/brush.h"
  26     #include "wx/colour.h"
  27     #include "wx/dc.h"
  28 #endif
  29
  30 #include "wx/html/htmlcell.h"
  31 #include "wx/html/htmlwin.h"
  32 #include "wx/settings.h"
  33 #include "wx/module.h"
  34
  35 #include <stdlib.h>
  36
  37 //-----------------------------------------------------------------------------
  38 // Global variables
  39 //-----------------------------------------------------------------------------
  40
  41 static wxCursor *gs_cursorLink = NULL;
  42 static wxCursor *gs_cursorText = NULL;
  43
  44
  45 //-----------------------------------------------------------------------------
  46 // Helper classes
  47 //-----------------------------------------------------------------------------
  48
  49 void wxHtmlSelection::Set(const wxPoint& fromPos, const wxHtmlCell *fromCell,
  50                           const wxPoint& toPos, const wxHtmlCell *toCell)
  51 {
  52     m_fromCell = fromCell;
  53     m_toCell = toCell;
  54     m_fromPos = fromPos;
  55     m_toPos = toPos;
  56 }
  57
  58 void wxHtmlSelection::Set(const wxHtmlCell *fromCell, const wxHtmlCell *toCell)
  59 {
  60     wxPoint p1 = fromCell ? fromCell->GetAbsPos() : wxDefaultPosition;
  61     wxPoint p2 = toCell ? toCell->GetAbsPos() : wxDefaultPosition;
  62     if ( toCell )
  63     {
  64         p2.x += toCell->GetWidth()-1;
  65         p2.y += toCell->GetHeight()-1;
  66     }
  67     Set(p1, fromCell, p2, toCell);
  68 }
  69
  70 wxColour wxDefaultHtmlRenderingStyle::GetSelectedTextColour(
  71                                         const wxColour& clr)
  72 {
  73     return wxSystemSettings::GetColour(wxSYS_COLOUR_HIGHLIGHTTEXT);
  74 }
  75
  76 wxColour wxDefaultHtmlRenderingStyle::GetSelectedTextBgColour(
  77                                         const wxColour& WXUNUSED(clr))
  78 {
  79     return wxSystemSettings::GetColour(wxSYS_COLOUR_HIGHLIGHT);
  80 }
  81
  82
  83 //-----------------------------------------------------------------------------
  84 // wxHtmlCell
  85 //-----------------------------------------------------------------------------
  86
  87 wxHtmlCell::wxHtmlCell() : wxObject()
  88 {
  89     m_Next = NULL;
  90     m_Parent = NULL;
  91     m_Width = m_Height = m_Descent = 0;
  92     m_CanLiveOnPagebreak = TRUE;
  93     m_Link = NULL;
  94 }
  95
  96 wxHtmlCell::~wxHtmlCell()
  97 {
  98     delete m_Link;
  99 }
 100
 101
 102 void wxHtmlCell::OnMouseClick(wxWindow *parent, int x, int y,
 103                               const wxMouseEvent& event)
 104 {
 105     wxHtmlLinkInfo *lnk = GetLink(x, y);
 106     if (lnk != NULL)
 107     {
 108         wxHtmlLinkInfo lnk2(*lnk);
 109         lnk2.SetEvent(&event);
 110         lnk2.SetHtmlCell(this);
 111
 112         // note : this cast is legal because parent is *always* wxHtmlWindow
 113         wxStaticCast(parent, wxHtmlWindow)->OnLinkClicked(lnk2);
 114     }
 115 }
 116
 117
 118 wxCursor wxHtmlCell::GetCursor() const
 119 {
 120     if ( GetLink() )
 121     {
 122         if ( !gs_cursorLink )
 123             gs_cursorLink = new wxCursor(wxCURSOR_HAND);
 124         return *gs_cursorLink;
 125     }
 126     else
 127         return *wxSTANDARD_CURSOR;
 128 }
 129
 130
 131 bool wxHtmlCell::AdjustPagebreak(int *pagebreak, int* WXUNUSED(known_pagebreaks), int WXUNUSED(number_of_pages)) const
 132 {
 133     if ((!m_CanLiveOnPagebreak) &&
 134                 m_PosY < *pagebreak && m_PosY + m_Height > *pagebreak)
 135     {
 136         *pagebreak = m_PosY;
 137         return TRUE;
 138     }
 139
 140     return FALSE;
 141 }
 142
 143
 144
 145 void wxHtmlCell::SetLink(const wxHtmlLinkInfo& link)
 146 {
 147     if (m_Link) delete m_Link;
 148     m_Link = NULL;
 149     if (link.GetHref() != wxEmptyString)
 150         m_Link = new wxHtmlLinkInfo(link);
 151 }
 152
 153
 154 void wxHtmlCell::Layout(int WXUNUSED(w))
 155 {
 156     SetPos(0, 0);
 157 }
 158
 159
 160
 161 void wxHtmlCell::GetHorizontalConstraints(int *left, int *right) const
 162 {
 163     if (left)
 164         *left = m_PosX;
 165     if (right)
 166         *right = m_PosX + m_Width;
 167 }
 168
 169
 170
 171 const wxHtmlCell* wxHtmlCell::Find(int WXUNUSED(condition), const void* WXUNUSED(param)) const
 172 {
 173     return NULL;
 174 }
 175
 176
 177 wxHtmlCell *wxHtmlCell::FindCellByPos(wxCoord x, wxCoord y,
 178                                       unsigned flags) const
 179 {
 180     if ( x >= 0 && x < m_Width && y >= 0 && y < m_Height )
 181     {
 182         return wxConstCast(this, wxHtmlCell);
 183     }
 184     else
 185     {
 186         if ((flags & wxHTML_FIND_NEAREST_AFTER) &&
 187                 (y < 0 || (y < 0+m_Height && x < 0+m_Width)))
 188             return wxConstCast(this, wxHtmlCell);
 189         else if ((flags & wxHTML_FIND_NEAREST_BEFORE) &&
 190                 (y >= 0+m_Height || (y >= 0 && x >= 0)))
 191             return wxConstCast(this, wxHtmlCell);
 192         else
 193             return NULL;
 194     }
 195 }
 196
 197
 198 wxPoint wxHtmlCell::GetAbsPos() const
 199 {
 200     wxPoint p(m_PosX, m_PosY);
 201     for (wxHtmlCell *parent = m_Parent; parent; parent = parent->m_Parent)
 202     {
 203         p.x += parent->m_PosX;
 204         p.y += parent->m_PosY;
 205     }
 206     return p;
 207 }
 208
 209 unsigned wxHtmlCell::GetDepth() const
 210 {
 211     unsigned d = 0;
 212     for (wxHtmlCell *p = m_Parent; p; p = p->m_Parent)
 213         d++;
 214     return d;
 215 }
 216
 217 bool wxHtmlCell::IsBefore(wxHtmlCell *cell) const
 218 {
 219     const wxHtmlCell *c1 = this;
 220     const wxHtmlCell *c2 = cell;
 221     unsigned d1 = GetDepth();
 222     unsigned d2 = cell->GetDepth();
 223
 224     if ( d1 > d2 )
 225         for (; d1 != d2; d1-- )
 226             c1 = c1->m_Parent;
 227     else if ( d1 < d2 )
 228         for (; d1 != d2; d2-- )
 229             c2 = c2->m_Parent;
 230
 231     if ( cell == this )
 232         return true;
 233
 234     while ( c1 && c2 )
 235     {
 236         if ( c1->m_Parent == c2->m_Parent )
 237         {
 238             while ( c1 )
 239             {
 240                 if ( c1 == c2 )
 241                     return true;
 242                 c1 = c1->GetNext();
 243             }
 244             return false;
 245         }
 246         else
 247         {
 248             c1 = c1->m_Parent;
 249             c2 = c2->m_Parent;
 250         }
 251     }
 252
 253     wxFAIL_MSG(_T("Cells are in different trees"));
 254     return false;
 255 }
 256
 257
 258 //-----------------------------------------------------------------------------
 259 // wxHtmlWordCell
 260 //-----------------------------------------------------------------------------
 261
 262 wxHtmlWordCell::wxHtmlWordCell(const wxString& word, wxDC& dc) : wxHtmlCell()
 263 {
 264     m_Word = word;
 265     dc.GetTextExtent(m_Word, &m_Width, &m_Height, &m_Descent);
 266     SetCanLiveOnPagebreak(FALSE);
 267 }
 268
 269
 270 // Splits m_Word into up to three parts according to selection, returns
 271 // substring before, in and after selection and the points (in relative coords)
 272 // where s2 and s3 start:
 273 void wxHtmlWordCell::Split(wxDC& dc,
 274                            const wxPoint& selFrom, const wxPoint& selTo,
 275                            unsigned& pos1, unsigned& pos2) const
 276 {
 277     wxPoint pt1 = (selFrom == wxDefaultPosition) ?
 278                    wxDefaultPosition : selFrom - GetAbsPos();
 279     wxPoint pt2 = (selTo == wxDefaultPosition) ?
 280                    wxPoint(m_Width, -1) : selTo - GetAbsPos();
 281
 282     wxCoord charW, charH;
 283     unsigned len = m_Word.length();
 284     unsigned i = 0;
 285     pos1 = 0;
 286
 287     // adjust for cases when the start/end position is completely
 288     // outside the cell:
 289     if ( pt1.y < 0 )
 290         pt1.x = 0;
 291     if ( pt2.y >= m_Height )
 292         pt2.x = m_Width;
 293
 294     // before selection:
 295     while ( pt1.x > 0 && i < len )
 296     {
 297         dc.GetTextExtent(m_Word[i], &charW, &charH);
 298         pt1.x -= charW;
 299         if ( pt1.x >= 0 )
 300         {
 301             pos1 += charW;
 302             i++;
 303         }
 304     }
 305
 306     // in selection:
 307     unsigned j = i;
 308     pos2 = pos1;
 309     pt2.x -= pos2;
 310     while ( pt2.x > 0 && j < len )
 311     {
 312         dc.GetTextExtent(m_Word[j], &charW, &charH);
 313         pt2.x -= charW;
 314         if ( pt2.x >= 0 )
 315         {
 316             pos2 += charW;
 317             j++;
 318         }
 319     }
 320
 321     pos1 = i;
 322     pos2 = j;
 323 }
 324
 325 void wxHtmlWordCell::SetSelectionPrivPos(wxDC& dc, wxHtmlSelection *s) const
 326 {
 327     unsigned p1, p2;
 328
 329     Split(dc,
 330           this == s->GetFromCell() ? s->GetFromPos() : wxDefaultPosition,
 331           this == s->GetToCell() ? s->GetToPos() : wxDefaultPosition,
 332           p1, p2);
 333
 334     wxPoint p(0, m_Word.length());
 335
 336     if ( this == s->GetFromCell() )
 337         p.x = p1; // selection starts here
 338     if ( this == s->GetToCell() )
 339         p.y = p2; // selection ends here
 340
 341     if ( this == s->GetFromCell() )
 342         s->SetFromPrivPos(p);
 343     if ( this == s->GetToCell() )
 344         s->SetToPrivPos(p);
 345 }
 346
 347
 348 static void SwitchSelState(wxDC& dc, wxHtmlRenderingInfo& info,
 349                            bool toSelection)
 350 {
 351     wxColour fg = info.GetState().GetFgColour();
 352     wxColour bg = info.GetState().GetBgColour();
 353
 354     if ( toSelection )
 355     {
 356         dc.SetBackgroundMode(wxSOLID);
 357         dc.SetTextForeground(info.GetStyle().GetSelectedTextColour(fg));
 358         dc.SetTextBackground(info.GetStyle().GetSelectedTextBgColour(bg));
 359         dc.SetBackground(wxBrush(info.GetStyle().GetSelectedTextBgColour(bg),
 360                                  wxSOLID));
 361     }
 362     else
 363     {
 364         dc.SetBackgroundMode(wxTRANSPARENT);
 365         dc.SetTextForeground(fg);
 366         dc.SetTextBackground(bg);
 367         dc.SetBackground(wxBrush(bg, wxSOLID));
 368     }
 369 }
 370
 371
 372 void wxHtmlWordCell::Draw(wxDC& dc, int x, int y,
 373                           int WXUNUSED(view_y1), int WXUNUSED(view_y2),
 374                           wxHtmlRenderingInfo& info)
 375 {
 376 #if 0 // useful for debugging
 377     dc.DrawRectangle(x+m_PosX,y+m_PosY,m_Width,m_Height);
 378 #endif
 379
 380     bool drawSelectionAfterCell = false;
 381
 382     if ( info.GetState().GetSelectionState() == wxHTML_SEL_CHANGING )
 383     {
 384         // Selection changing, we must draw the word piecewise:
 385         wxHtmlSelection *s = info.GetSelection();
 386         wxString txt;
 387         int w, h;
 388         int ofs = 0;
 389
 390         wxPoint priv = (this == s->GetFromCell()) ?
 391                            s->GetFromPrivPos() : s->GetToPrivPos();
 392
 393         // NB: this is quite a hack: in order to compute selection boundaries
 394         //     (in word's characters) we must know current font, which is only
 395         //     possible inside rendering code. Therefore we update the
 396         //     information here and store it in wxHtmlSelection so that
 397         //     ConvertToText can use it later:
 398         if ( priv == wxDefaultPosition )
 399         {
 400             SetSelectionPrivPos(dc, s);
 401             priv = (this == s->GetFromCell()) ?
 402                     s->GetFromPrivPos() : s->GetToPrivPos();
 403         }
 404
 405         int part1 = priv.x;
 406         int part2 = priv.y;
 407
 408         if ( part1 > 0 )
 409         {
 410             txt = m_Word.Mid(0, part1);
 411             dc.DrawText(txt, x + m_PosX, y + m_PosY);
 412             dc.GetTextExtent(txt, &w, &h);
 413             ofs += w;
 414         }
 415
 416         SwitchSelState(dc, info, true);
 417
 418         txt = m_Word.Mid(part1, part2-part1);
 419         dc.DrawText(txt, ofs + x + m_PosX, y + m_PosY);
 420
 421         if ( (size_t)part2 < m_Word.length() )
 422         {
 423             dc.GetTextExtent(txt, &w, &h);
 424             ofs += w;
 425             SwitchSelState(dc, info, false);
 426             txt = m_Word.Mid(part2);
 427             dc.DrawText(txt, ofs + x + m_PosX, y + m_PosY);
 428         }
 429         else
 430             drawSelectionAfterCell = true;
 431     }
 432     else
 433     {
 434         wxHtmlSelectionState selstate = info.GetState().GetSelectionState();
 435         // Not changing selection state, draw the word in single mode:
 436         if ( selstate != wxHTML_SEL_OUT &&
 437              dc.GetBackgroundMode() != wxSOLID )
 438         {
 439             SwitchSelState(dc, info, true);
 440         }
 441         else if ( selstate == wxHTML_SEL_OUT &&
 442                   dc.GetBackgroundMode() == wxSOLID )
 443         {
 444             SwitchSelState(dc, info, false);
 445         }
 446         dc.DrawText(m_Word, x + m_PosX, y + m_PosY);
 447         drawSelectionAfterCell = (selstate != wxHTML_SEL_OUT);
 448     }
 449
 450     // NB: If the text is justified then there is usually some free space
 451     //     between adjacent cells and drawing the selection only onto cells
 452     //     would result in ugly unselected spaces. The code below detects
 453     //     this special case and renders the selection *outside* the sell,
 454     //     too.
 455     if ( m_Parent->GetAlignHor() == wxHTML_ALIGN_JUSTIFY &&
 456          drawSelectionAfterCell )
 457     {
 458         wxHtmlCell *nextCell = m_Next;
 459         while ( nextCell && nextCell->IsFormattingCell() )
 460             nextCell = nextCell->GetNext();
 461         if ( nextCell )
 462         {
 463             int nextX = nextCell->GetPosX();
 464             if ( m_PosX + m_Width < nextX )
 465             {
 466                 dc.SetBrush(dc.GetBackground());
 467                 dc.SetPen(*wxTRANSPARENT_PEN);
 468                 dc.DrawRectangle(x + m_PosX + m_Width, y + m_PosY,
 469                                  nextX - m_PosX - m_Width, m_Height);
 470             }
 471         }
 472     }
 473 }
 474
 475
 476 wxString wxHtmlWordCell::ConvertToText(wxHtmlSelection *s) const
 477 {
 478     if ( s && (this == s->GetFromCell() || this == s->GetToCell()) )
 479     {
 480         wxPoint priv = this == s->GetFromCell() ? s->GetFromPrivPos()
 481                                                 : s->GetToPrivPos();
 482
 483         // VZ: we may be called before we had a chance to re-render ourselves
 484         //     and in this case GetFrom/ToPrivPos() is not set yet -- assume
 485         //     that this only happens in case of a double/triple click (which
 486         //     seems to be the case now) and so it makes sense to select the
 487         //     entire contents of the cell in this case
 488         //
 489         // TODO: but this really needs to be fixed in some better way later...
 490         if ( priv != wxDefaultPosition )
 491         {
 492             int part1 = priv.x;
 493             int part2 = priv.y;
 494             return m_Word.Mid(part1, part2-part1);
 495         }
 496         //else: return the whole word below
 497     }
 498
 499     return m_Word;
 500 }
 501
 502 wxCursor wxHtmlWordCell::GetCursor() const
 503 {
 504     if ( !GetLink() )
 505     {
 506         if ( !gs_cursorText )
 507             gs_cursorText = new wxCursor(wxCURSOR_IBEAM);
 508         return *gs_cursorText;
 509     }
 510     else
 511         return wxHtmlCell::GetCursor();
 512 }
 513
 514
 515 //-----------------------------------------------------------------------------
 516 // wxHtmlContainerCell
 517 //-----------------------------------------------------------------------------
 518
 519
 520 wxHtmlContainerCell::wxHtmlContainerCell(wxHtmlContainerCell *parent) : wxHtmlCell()
 521 {
 522     m_Cells = m_LastCell = NULL;
 523     m_Parent = parent;
 524     if (m_Parent) m_Parent->InsertCell(this);
 525     m_AlignHor = wxHTML_ALIGN_LEFT;
 526     m_AlignVer = wxHTML_ALIGN_BOTTOM;
 527     m_IndentLeft = m_IndentRight = m_IndentTop = m_IndentBottom = 0;
 528     m_WidthFloat = 100; m_WidthFloatUnits = wxHTML_UNITS_PERCENT;
 529     m_UseBkColour = FALSE;
 530     m_UseBorder = FALSE;
 531     m_MinHeight = 0;
 532     m_MinHeightAlign = wxHTML_ALIGN_TOP;
 533     m_LastLayout = -1;
 534 }
 535
 536 wxHtmlContainerCell::~wxHtmlContainerCell()
 537 {
 538     wxHtmlCell *cell = m_Cells;
 539     while ( cell )
 540     {
 541         wxHtmlCell *cellNext = cell->GetNext();
 542         delete cell;
 543         cell = cellNext;
 544     }
 545 }
 546
 547
 548
 549 void wxHtmlContainerCell::SetIndent(int i, int what, int units)
 550 {
 551     int val = (units == wxHTML_UNITS_PIXELS) ? i : -i;
 552     if (what & wxHTML_INDENT_LEFT) m_IndentLeft = val;
 553     if (what & wxHTML_INDENT_RIGHT) m_IndentRight = val;
 554     if (what & wxHTML_INDENT_TOP) m_IndentTop = val;
 555     if (what & wxHTML_INDENT_BOTTOM) m_IndentBottom = val;
 556     m_LastLayout = -1;
 557 }
 558
 559
 560
 561 int wxHtmlContainerCell::GetIndent(int ind) const
 562 {
 563     if (ind & wxHTML_INDENT_LEFT) return m_IndentLeft;
 564     else if (ind & wxHTML_INDENT_RIGHT) return m_IndentRight;
 565     else if (ind & wxHTML_INDENT_TOP) return m_IndentTop;
 566     else if (ind & wxHTML_INDENT_BOTTOM) return m_IndentBottom;
 567     else return -1; /* BUG! Should not be called... */
 568 }
 569
 570
 571
 572
 573 int wxHtmlContainerCell::GetIndentUnits(int ind) const
 574 {
 575     bool p = FALSE;
 576     if (ind & wxHTML_INDENT_LEFT) p = m_IndentLeft < 0;
 577     else if (ind & wxHTML_INDENT_RIGHT) p = m_IndentRight < 0;
 578     else if (ind & wxHTML_INDENT_TOP) p = m_IndentTop < 0;
 579     else if (ind & wxHTML_INDENT_BOTTOM) p = m_IndentBottom < 0;
 580     if (p) return wxHTML_UNITS_PERCENT;
 581     else return wxHTML_UNITS_PIXELS;
 582 }
 583
 584
 585
 586 bool wxHtmlContainerCell::AdjustPagebreak(int *pagebreak, int* known_pagebreaks, int number_of_pages) const
 587 {
 588     if (!m_CanLiveOnPagebreak)
 589         return wxHtmlCell::AdjustPagebreak(pagebreak, known_pagebreaks, number_of_pages);
 590
 591     else
 592     {
 593         wxHtmlCell *c = GetFirstChild();
 594         bool rt = FALSE;
 595         int pbrk = *pagebreak - m_PosY;
 596
 597         while (c)
 598         {
 599             if (c->AdjustPagebreak(&pbrk, known_pagebreaks, number_of_pages))
 600                 rt = TRUE;
 601             c = c->GetNext();
 602         }
 603         if (rt)
 604             *pagebreak = pbrk + m_PosY;
 605         return rt;
 606     }
 607 }
 608
 609
 610
 611 void wxHtmlContainerCell::Layout(int w)
 612 {
 613     wxHtmlCell::Layout(w);
 614
 615     if (m_LastLayout == w) return;
 616
 617     // VS: Any attempt to layout with negative or zero width leads to hell,
 618     // but we can't ignore such attempts completely, since it sometimes
 619     // happen (e.g. when trying how small a table can be). The best thing we
 620     // can do is to set the width of child cells to zero
 621     if (w < 1)
 622     {
 623        m_Width = 0;
 624        for (wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext())
 625             cell->Layout(0);
 626             // this does two things: it recursively calls this code on all
 627             // child contrainers and resets children's position to (0,0)
 628        return;
 629     }
 630
 631     wxHtmlCell *cell = m_Cells, *line = m_Cells;
 632     long xpos = 0, ypos = m_IndentTop;
 633     int xdelta = 0, ybasicpos = 0, ydiff;
 634     int s_width, s_indent;
 635     int ysizeup = 0, ysizedown = 0;
 636     int MaxLineWidth = 0;
 637     int xcnt = 0;
 638
 639
 640     /*
 641
 642     WIDTH ADJUSTING :
 643
 644     */
 645
 646     if (m_WidthFloatUnits == wxHTML_UNITS_PERCENT)
 647     {
 648         if (m_WidthFloat < 0) m_Width = (100 + m_WidthFloat) * w / 100;
 649         else m_Width = m_WidthFloat * w / 100;
 650     }
 651     else
 652     {
 653         if (m_WidthFloat < 0) m_Width = w + m_WidthFloat;
 654         else m_Width = m_WidthFloat;
 655     }
 656
 657     if (m_Cells)
 658     {
 659         int l = (m_IndentLeft < 0) ? (-m_IndentLeft * m_Width / 100) : m_IndentLeft;
 660         int r = (m_IndentRight < 0) ? (-m_IndentRight * m_Width / 100) : m_IndentRight;
 661         for (wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext())
 662             cell->Layout(m_Width - (l + r));
 663     }
 664
 665     /*
 666
 667     LAYOUTING :
 668
 669     */
 670
 671     // adjust indentation:
 672     s_indent = (m_IndentLeft < 0) ? (-m_IndentLeft * m_Width / 100) : m_IndentLeft;
 673     s_width = m_Width - s_indent - ((m_IndentRight < 0) ? (-m_IndentRight * m_Width / 100) : m_IndentRight);
 674
 675     // my own layouting:
 676     while (cell != NULL)
 677     {
 678         switch (m_AlignVer)
 679         {
 680             case wxHTML_ALIGN_TOP :      ybasicpos = 0; break;
 681             case wxHTML_ALIGN_BOTTOM :   ybasicpos = - cell->GetHeight(); break;
 682             case wxHTML_ALIGN_CENTER :   ybasicpos = - cell->GetHeight() / 2; break;
 683         }
 684         ydiff = cell->GetHeight() + ybasicpos;
 685
 686         if (cell->GetDescent() + ydiff > ysizedown) ysizedown = cell->GetDescent() + ydiff;
 687         if (ybasicpos + cell->GetDescent() < -ysizeup) ysizeup = - (ybasicpos + cell->GetDescent());
 688
 689         cell->SetPos(xpos, ybasicpos + cell->GetDescent());
 690         xpos += cell->GetWidth();
 691         cell = cell->GetNext();
 692         xcnt++;
 693
 694         // force new line if occured:
 695         if ((cell == NULL) || (xpos + cell->GetWidth() > s_width))
 696         {
 697             if (xpos > MaxLineWidth) MaxLineWidth = xpos;
 698             if (ysizeup < 0) ysizeup = 0;
 699             if (ysizedown < 0) ysizedown = 0;
 700             switch (m_AlignHor) {
 701                 case wxHTML_ALIGN_LEFT :
 702                 case wxHTML_ALIGN_JUSTIFY :
 703                          xdelta = 0;
 704                          break;
 705                 case wxHTML_ALIGN_RIGHT :
 706                          xdelta = 0 + (s_width - xpos);
 707                          break;
 708                 case wxHTML_ALIGN_CENTER :
 709                          xdelta = 0 + (s_width - xpos) / 2;
 710                          break;
 711             }
 712             if (xdelta < 0) xdelta = 0;
 713             xdelta += s_indent;
 714
 715             ypos += ysizeup;
 716
 717             if (m_AlignHor != wxHTML_ALIGN_JUSTIFY || cell == NULL)
 718                 while (line != cell)
 719                 {
 720                     line->SetPos(line->GetPosX() + xdelta,
 721                                    ypos + line->GetPosY());
 722                     line = line->GetNext();
 723                 }
 724             else
 725             {
 726                 int counter = 0;
 727                 int step = (s_width - xpos);
 728                 if (step < 0) step = 0;
 729                 xcnt--;
 730                 if (xcnt > 0) while (line != cell)
 731                 {
 732                     line->SetPos(line->GetPosX() + s_indent +
 733                                    (counter++ * step / xcnt),
 734                                    ypos + line->GetPosY());
 735                     line = line->GetNext();
 736                 }
 737                 xcnt++;
 738             }
 739
 740             ypos += ysizedown;
 741             xpos = xcnt = 0;
 742             ysizeup = ysizedown = 0;
 743             line = cell;
 744         }
 745     }
 746
 747     // setup height & width, depending on container layout:
 748     m_Height = ypos + (ysizedown + ysizeup) + m_IndentBottom;
 749
 750     if (m_Height < m_MinHeight)
 751     {
 752         if (m_MinHeightAlign != wxHTML_ALIGN_TOP)
 753         {
 754             int diff = m_MinHeight - m_Height;
 755             if (m_MinHeightAlign == wxHTML_ALIGN_CENTER) diff /= 2;
 756             cell = m_Cells;
 757             while (cell)
 758             {
 759                 cell->SetPos(cell->GetPosX(), cell->GetPosY() + diff);
 760                 cell = cell->GetNext();
 761             }
 762         }
 763         m_Height = m_MinHeight;
 764     }
 765
 766     MaxLineWidth += s_indent + ((m_IndentRight < 0) ? (-m_IndentRight * m_Width / 100) : m_IndentRight);
 767     if (m_Width < MaxLineWidth) m_Width = MaxLineWidth;
 768
 769     m_LastLayout = w;
 770 }
 771
 772 void wxHtmlContainerCell::UpdateRenderingStatePre(wxHtmlRenderingInfo& info,
 773                                                   wxHtmlCell *cell) const
 774 {
 775     wxHtmlSelection *s = info.GetSelection();
 776     if (!s) return;
 777     if (s->GetFromCell() == cell || s->GetToCell() == cell)
 778     {
 779         info.GetState().SetSelectionState(wxHTML_SEL_CHANGING);
 780     }
 781 }
 782
 783 void wxHtmlContainerCell::UpdateRenderingStatePost(wxHtmlRenderingInfo& info,
 784                                                    wxHtmlCell *cell) const
 785 {
 786     wxHtmlSelection *s = info.GetSelection();
 787     if (!s) return;
 788     if (s->GetToCell() == cell)
 789         info.GetState().SetSelectionState(wxHTML_SEL_OUT);
 790     else if (s->GetFromCell() == cell)
 791         info.GetState().SetSelectionState(wxHTML_SEL_IN);
 792 }
 793
 794 #define mMin(a, b) (((a) < (b)) ? (a) : (b))
 795 #define mMax(a, b) (((a) < (b)) ? (b) : (a))
 796
 797 void wxHtmlContainerCell::Draw(wxDC& dc, int x, int y, int view_y1, int view_y2,
 798                                wxHtmlRenderingInfo& info)
 799 {
 800     // container visible, draw it:
 801     if ((y + m_PosY <= view_y2) && (y + m_PosY + m_Height > view_y1))
 802     {
 803         if (m_UseBkColour)
 804         {
 805             wxBrush myb = wxBrush(m_BkColour, wxSOLID);
 806
 807             int real_y1 = mMax(y + m_PosY, view_y1);
 808             int real_y2 = mMin(y + m_PosY + m_Height - 1, view_y2);
 809
 810             dc.SetBrush(myb);
 811             dc.SetPen(*wxTRANSPARENT_PEN);
 812             dc.DrawRectangle(x + m_PosX, real_y1, m_Width, real_y2 - real_y1 + 1);
 813         }
 814
 815         if (m_UseBorder)
 816         {
 817             wxPen mypen1(m_BorderColour1, 1, wxSOLID);
 818             wxPen mypen2(m_BorderColour2, 1, wxSOLID);
 819
 820             dc.SetPen(mypen1);
 821             dc.DrawLine(x + m_PosX, y + m_PosY, x + m_PosX, y + m_PosY + m_Height - 1);
 822             dc.DrawLine(x + m_PosX, y + m_PosY, x + m_PosX + m_Width, y + m_PosY);
 823             dc.SetPen(mypen2);
 824             dc.DrawLine(x + m_PosX + m_Width - 1, y + m_PosY, x + m_PosX +  m_Width - 1, y + m_PosY + m_Height - 1);
 825             dc.DrawLine(x + m_PosX, y + m_PosY + m_Height - 1, x + m_PosX + m_Width, y + m_PosY + m_Height - 1);
 826         }
 827
 828         if (m_Cells)
 829         {
 830             // draw container's contents:
 831             for (wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext())
 832             {
 833                 UpdateRenderingStatePre(info, cell);
 834                 cell->Draw(dc,
 835                            x + m_PosX, y + m_PosY, view_y1, view_y2,
 836                            info);
 837                 UpdateRenderingStatePost(info, cell);
 838             }
 839         }
 840     }
 841     // container invisible, just proceed font+color changing:
 842     else
 843     {
 844         DrawInvisible(dc, x, y, info);
 845     }
 846 }
 847
 848
 849
 850 void wxHtmlContainerCell::DrawInvisible(wxDC& dc, int x, int y,
 851                                         wxHtmlRenderingInfo& info)
 852 {
 853     if (m_Cells)
 854     {
 855         for (wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext())
 856         {
 857             UpdateRenderingStatePre(info, cell);
 858             cell->DrawInvisible(dc, x + m_PosX, y + m_PosY, info);
 859             UpdateRenderingStatePost(info, cell);
 860         }
 861     }
 862 }
 863
 864
 865 wxColour wxHtmlContainerCell::GetBackgroundColour()
 866 {
 867     if (m_UseBkColour)
 868         return m_BkColour;
 869     else
 870         return wxNullColour;
 871 }
 872
 873
 874
 875 wxHtmlLinkInfo *wxHtmlContainerCell::GetLink(int x, int y) const
 876 {
 877     wxHtmlCell *cell = FindCellByPos(x, y);
 878
 879     // VZ: I don't know if we should pass absolute or relative coords to
 880     //     wxHtmlCell::GetLink()? As the base class version just ignores them
 881     //     anyhow, it hardly matters right now but should still be clarified
 882     return cell ? cell->GetLink(x, y) : NULL;
 883 }
 884
 885
 886
 887 void wxHtmlContainerCell::InsertCell(wxHtmlCell *f)
 888 {
 889     if (!m_Cells) m_Cells = m_LastCell = f;
 890     else
 891     {
 892         m_LastCell->SetNext(f);
 893         m_LastCell = f;
 894         if (m_LastCell) while (m_LastCell->GetNext()) m_LastCell = m_LastCell->GetNext();
 895     }
 896     f->SetParent(this);
 897     m_LastLayout = -1;
 898 }
 899
 900
 901
 902 void wxHtmlContainerCell::SetAlign(const wxHtmlTag& tag)
 903 {
 904     if (tag.HasParam(wxT("ALIGN")))
 905     {
 906         wxString alg = tag.GetParam(wxT("ALIGN"));
 907         alg.MakeUpper();
 908         if (alg == wxT("CENTER"))
 909             SetAlignHor(wxHTML_ALIGN_CENTER);
 910         else if (alg == wxT("LEFT"))
 911             SetAlignHor(wxHTML_ALIGN_LEFT);
 912         else if (alg == wxT("JUSTIFY"))
 913             SetAlignHor(wxHTML_ALIGN_JUSTIFY);
 914         else if (alg == wxT("RIGHT"))
 915             SetAlignHor(wxHTML_ALIGN_RIGHT);
 916         m_LastLayout = -1;
 917     }
 918 }
 919
 920
 921
 922 void wxHtmlContainerCell::SetWidthFloat(const wxHtmlTag& tag, double pixel_scale)
 923 {
 924     if (tag.HasParam(wxT("WIDTH")))
 925     {
 926         int wdi;
 927         wxString wd = tag.GetParam(wxT("WIDTH"));
 928
 929         if (wd[wd.Length()-1] == wxT('%'))
 930         {
 931             wxSscanf(wd.c_str(), wxT("%i%%"), &wdi);
 932             SetWidthFloat(wdi, wxHTML_UNITS_PERCENT);
 933         }
 934         else
 935         {
 936             wxSscanf(wd.c_str(), wxT("%i"), &wdi);
 937             SetWidthFloat((int)(pixel_scale * (double)wdi), wxHTML_UNITS_PIXELS);
 938         }
 939         m_LastLayout = -1;
 940     }
 941 }
 942
 943
 944
 945 const wxHtmlCell* wxHtmlContainerCell::Find(int condition, const void* param) const
 946 {
 947     if (m_Cells)
 948     {
 949         const wxHtmlCell *r = NULL;
 950
 951         for (wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext())
 952         {
 953             r = cell->Find(condition, param);
 954             if (r) return r;
 955         }
 956     }
 957     return NULL;
 958 }
 959
 960
 961 wxHtmlCell *wxHtmlContainerCell::FindCellByPos(wxCoord x, wxCoord y,
 962                                                unsigned flags) const
 963 {
 964     if ( flags & wxHTML_FIND_EXACT )
 965     {
 966         for ( const wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext() )
 967         {
 968             int cx = cell->GetPosX(),
 969                 cy = cell->GetPosY();
 970
 971             if ( (cx <= x) && (cx + cell->GetWidth() > x) &&
 972                  (cy <= y) && (cy + cell->GetHeight() > y) )
 973             {
 974                 return cell->FindCellByPos(x - cx, y - cy, flags);
 975             }
 976         }
 977     }
 978     else if ( flags & wxHTML_FIND_NEAREST_AFTER )
 979     {
 980         wxHtmlCell *c;
 981         for ( const wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext() )
 982         {
 983             if ( cell->IsFormattingCell() )
 984                 continue;
 985             int cellY = cell->GetPosY();
 986             if (!( y < cellY || (y < cellY + cell->GetHeight() &&
 987                                  x < cell->GetPosX() + cell->GetWidth()) ))
 988                 continue;
 989
 990             c = cell->FindCellByPos(x - cell->GetPosX(), y - cellY, flags);
 991             if (c) return c;
 992         }
 993     }
 994     else if ( flags & wxHTML_FIND_NEAREST_BEFORE )
 995     {
 996         wxHtmlCell *c2, *c = NULL;
 997         for ( const wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext() )
 998         {
 999             if ( cell->IsFormattingCell() )
1000                 continue;
1001             int cellY = cell->GetPosY();
1002             if (!( cellY + cell->GetHeight() <= y ||
1003                    (y >= cellY && x >= cell->GetPosX()) ))
1004                 break;
1005             c2 = cell->FindCellByPos(x - cell->GetPosX(), y - cellY, flags);
1006             if (c2)
1007                 c = c2;
1008         }
1009         if (c) return c;
1010     }
1011
1012     return NULL;
1013 }
1014
1015
1016 void wxHtmlContainerCell::OnMouseClick(wxWindow *parent, int x, int y, const wxMouseEvent& event)
1017 {
1018     wxHtmlCell *cell = FindCellByPos(x, y);
1019     if ( cell )
1020         cell->OnMouseClick(parent, x, y, event);
1021 }
1022
1023
1024
1025 void wxHtmlContainerCell::GetHorizontalConstraints(int *left, int *right) const
1026 {
1027     int cleft = m_PosX + m_Width, cright = m_PosX; // worst case
1028     int l, r;
1029
1030     for (wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext())
1031     {
1032         cell->GetHorizontalConstraints(&l, &r);
1033         if (l < cleft)
1034             cleft = l;
1035         if (r > cright)
1036             cright = r;
1037     }
1038
1039     cleft -= (m_IndentLeft < 0) ? (-m_IndentLeft * m_Width / 100) : m_IndentLeft;
1040     cright += (m_IndentRight < 0) ? (-m_IndentRight * m_Width / 100) : m_IndentRight;
1041
1042     if (left)
1043         *left = cleft;
1044     if (right)
1045         *right = cright;
1046 }
1047
1048
1049 wxHtmlCell *wxHtmlContainerCell::GetFirstTerminal() const
1050 {
1051     if ( m_Cells )
1052     {
1053         wxHtmlCell *c2;
1054         for (wxHtmlCell *c = m_Cells; c; c = c->GetNext())
1055         {
1056             c2 = c->GetFirstTerminal();
1057             if ( c2 )
1058                 return c2;
1059         }
1060     }
1061     return NULL;
1062 }
1063
1064 wxHtmlCell *wxHtmlContainerCell::GetLastTerminal() const
1065 {
1066     if ( m_Cells )
1067     {
1068         // most common case first:
1069         wxHtmlCell *c = m_LastCell->GetLastTerminal();
1070         if ( c )
1071             return c;
1072
1073         wxHtmlCell *c2 = NULL;
1074         for (c = m_Cells; c; c = c->GetNext())
1075             c2 = c->GetLastTerminal();
1076         return c2;
1077     }
1078     else
1079         return NULL;
1080 }
1081
1082
1083
1084
1085 // --------------------------------------------------------------------------
1086 // wxHtmlColourCell
1087 // --------------------------------------------------------------------------
1088
1089 void wxHtmlColourCell::Draw(wxDC& dc,
1090                             int x, int y,
1091                             int WXUNUSED(view_y1), int WXUNUSED(view_y2),
1092                             wxHtmlRenderingInfo& info)
1093 {
1094     DrawInvisible(dc, x, y, info);
1095 }
1096
1097 void wxHtmlColourCell::DrawInvisible(wxDC& dc,
1098                                      int WXUNUSED(x), int WXUNUSED(y),
1099                                      wxHtmlRenderingInfo& info)
1100 {
1101     wxHtmlRenderingState& state = info.GetState();
1102     if (m_Flags & wxHTML_CLR_FOREGROUND)
1103     {
1104         state.SetFgColour(m_Colour);
1105         if (state.GetSelectionState() != wxHTML_SEL_IN)
1106             dc.SetTextForeground(m_Colour);
1107         else
1108             dc.SetTextForeground(
1109                     info.GetStyle().GetSelectedTextColour(m_Colour));
1110     }
1111     if (m_Flags & wxHTML_CLR_BACKGROUND)
1112     {
1113         state.SetBgColour(m_Colour);
1114         if (state.GetSelectionState() != wxHTML_SEL_IN)
1115         {
1116             dc.SetTextBackground(m_Colour);
1117             dc.SetBackground(wxBrush(m_Colour, wxSOLID));
1118         }
1119         else
1120         {
1121             wxColour c = info.GetStyle().GetSelectedTextBgColour(m_Colour);
1122             dc.SetTextBackground(c);
1123             dc.SetBackground(wxBrush(c, wxSOLID));
1124         }
1125     }
1126 }
1127
1128
1129
1130
1131 // ---------------------------------------------------------------------------
1132 // wxHtmlFontCell
1133 // ---------------------------------------------------------------------------
1134
1135 void wxHtmlFontCell::Draw(wxDC& dc,
1136                           int WXUNUSED(x), int WXUNUSED(y),
1137                           int WXUNUSED(view_y1), int WXUNUSED(view_y2),
1138                           wxHtmlRenderingInfo& WXUNUSED(info))
1139 {
1140     dc.SetFont(m_Font);
1141 }
1142
1143 void wxHtmlFontCell::DrawInvisible(wxDC& dc, int WXUNUSED(x), int WXUNUSED(y),
1144                                    wxHtmlRenderingInfo& WXUNUSED(info))
1145 {
1146     dc.SetFont(m_Font);
1147 }
1148
1149
1150
1151
1152
1153
1154
1155
1156 // ---------------------------------------------------------------------------
1157 // wxHtmlWidgetCell
1158 // ---------------------------------------------------------------------------
1159
1160 wxHtmlWidgetCell::wxHtmlWidgetCell(wxWindow *wnd, int w)
1161 {
1162     int sx, sy;
1163     m_Wnd = wnd;
1164     m_Wnd->GetSize(&sx, &sy);
1165     m_Width = sx, m_Height = sy;
1166     m_WidthFloat = w;
1167 }
1168
1169
1170 void wxHtmlWidgetCell::Draw(wxDC& WXUNUSED(dc),
1171                             int WXUNUSED(x), int WXUNUSED(y),
1172                             int WXUNUSED(view_y1), int WXUNUSED(view_y2),
1173                             wxHtmlRenderingInfo& WXUNUSED(info))
1174 {
1175     int absx = 0, absy = 0, stx, sty;
1176     wxHtmlCell *c = this;
1177
1178     while (c)
1179     {
1180         absx += c->GetPosX();
1181         absy += c->GetPosY();
1182         c = c->GetParent();
1183     }
1184
1185     ((wxScrolledWindow*)(m_Wnd->GetParent()))->GetViewStart(&stx, &sty);
1186     m_Wnd->SetSize(absx - wxHTML_SCROLL_STEP * stx, absy  - wxHTML_SCROLL_STEP * sty, m_Width, m_Height);
1187 }
1188
1189
1190
1191 void wxHtmlWidgetCell::DrawInvisible(wxDC& WXUNUSED(dc),
1192                                      int WXUNUSED(x), int WXUNUSED(y),
1193                                      wxHtmlRenderingInfo& WXUNUSED(info))
1194 {
1195     int absx = 0, absy = 0, stx, sty;
1196     wxHtmlCell *c = this;
1197
1198     while (c)
1199     {
1200         absx += c->GetPosX();
1201         absy += c->GetPosY();
1202         c = c->GetParent();
1203     }
1204
1205     ((wxScrolledWindow*)(m_Wnd->GetParent()))->GetViewStart(&stx, &sty);
1206     m_Wnd->SetSize(absx - wxHTML_SCROLL_STEP * stx, absy  - wxHTML_SCROLL_STEP * sty, m_Width, m_Height);
1207 }
1208
1209
1210
1211 void wxHtmlWidgetCell::Layout(int w)
1212 {
1213     if (m_WidthFloat != 0)
1214     {
1215         m_Width = (w * m_WidthFloat) / 100;
1216         m_Wnd->SetSize(m_Width, m_Height);
1217     }
1218
1219     wxHtmlCell::Layout(w);
1220 }
1221
1222
1223
1224 // ----------------------------------------------------------------------------
1225 // wxHtmlTerminalCellsInterator
1226 // ----------------------------------------------------------------------------
1227
1228 const wxHtmlCell* wxHtmlTerminalCellsInterator::operator++()
1229 {
1230     if ( !m_pos )
1231         return NULL;
1232
1233     do
1234     {
1235         if ( m_pos == m_to )
1236         {
1237             m_pos = NULL;
1238             return NULL;
1239         }
1240
1241         if ( m_pos->GetNext() )
1242             m_pos = m_pos->GetNext();
1243         else
1244         {
1245             // we must go up the hierarchy until we reach container where this
1246             // is not the last child, and then go down to first terminal cell:
1247             while ( m_pos->GetNext() == NULL )
1248             {
1249                 m_pos = m_pos->GetParent();
1250                 if ( !m_pos )
1251                     return NULL;
1252             }
1253             m_pos = m_pos->GetNext();
1254         }
1255         while ( m_pos->GetFirstChild() != NULL )
1256             m_pos = m_pos->GetFirstChild();
1257     } while ( !m_pos->IsTerminalCell() );
1258
1259     return m_pos;
1260 }
1261
1262
1263
1264
1265
1266
1267
1268 //-----------------------------------------------------------------------------
1269 // Cleanup
1270 //-----------------------------------------------------------------------------
1271
1272 class wxHtmlCellModule: public wxModule
1273 {
1274 DECLARE_DYNAMIC_CLASS(wxHtmlCellModule)
1275 public:
1276     wxHtmlCellModule() : wxModule() {}
1277     bool OnInit() { return true; }
1278     void OnExit()
1279     {
1280         wxDELETE(gs_cursorLink);
1281         wxDELETE(gs_cursorText);
1282     }
1283 };
1284
1285 IMPLEMENT_DYNAMIC_CLASS(wxHtmlCellModule, wxModule)
1286
1287 #endif