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 && x <= 0)))
 188             return wxConstCast(this, wxHtmlCell);
 189         else if ((flags & wxHTML_FIND_NEAREST_BEFORE) &&
 190                 (y > m_Height-1 || (y == m_Height-1 && x >= m_Width)))
 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     // before selection:
 288     while ( pt1.x > 0 && i < len )
 289     {
 290         dc.GetTextExtent(m_Word[i], &charW, &charH);
 291         pt1.x -= charW;
 292         if ( pt1.x >= 0 )
 293         {
 294             pos1 += charW;
 295             i++;
 296         }
 297     }
 298
 299     // in selection:
 300     unsigned j = i;
 301     pos2 = pos1;
 302     pt2.x -= pos2;
 303     while ( pt2.x > 0 && j < len )
 304     {
 305         dc.GetTextExtent(m_Word[j], &charW, &charH);
 306         pt2.x -= charW;
 307         if ( pt2.x >= 0 )
 308         {
 309             pos2 += charW;
 310             j++;
 311         }
 312     }
 313
 314     pos1 = i;
 315     pos2 = j;
 316 }
 317
 318 void wxHtmlWordCell::SetSelectionPrivPos(wxDC& dc, wxHtmlSelection *s) const
 319 {
 320     unsigned p1, p2;
 321
 322     Split(dc,
 323           this == s->GetFromCell() ? s->GetFromPos() : wxDefaultPosition,
 324           this == s->GetToCell() ? s->GetToPos() : wxDefaultPosition,
 325           p1, p2);
 326
 327     wxPoint p(0, m_Word.length());
 328
 329     if ( this == s->GetFromCell() )
 330         p.x = p1; // selection starts here
 331     if ( this == s->GetToCell() )
 332         p.y = p2; // selection ends here
 333
 334     if ( this == s->GetFromCell() )
 335         s->SetFromPrivPos(p);
 336     if ( this == s->GetToCell() )
 337         s->SetToPrivPos(p);
 338 }
 339
 340
 341 static void SwitchSelState(wxDC& dc, wxHtmlRenderingInfo& info,
 342                            bool toSelection)
 343 {
 344     wxColour fg = info.GetState().GetFgColour();
 345     wxColour bg = info.GetState().GetBgColour();
 346
 347     if ( toSelection )
 348     {
 349         dc.SetBackgroundMode(wxSOLID);
 350         dc.SetTextForeground(info.GetStyle().GetSelectedTextColour(fg));
 351         dc.SetTextBackground(info.GetStyle().GetSelectedTextBgColour(bg));
 352         dc.SetBackground(wxBrush(info.GetStyle().GetSelectedTextBgColour(bg),
 353                                  wxSOLID));
 354     }
 355     else
 356     {
 357         dc.SetBackgroundMode(wxTRANSPARENT);
 358         dc.SetTextForeground(fg);
 359         dc.SetTextBackground(bg);
 360         dc.SetBackground(wxBrush(bg, wxSOLID));
 361     }
 362 }
 363
 364
 365 void wxHtmlWordCell::Draw(wxDC& dc, int x, int y,
 366                           int WXUNUSED(view_y1), int WXUNUSED(view_y2),
 367                           wxHtmlRenderingInfo& info)
 368 {
 369 #if 0 // useful for debugging
 370     dc.DrawRectangle(x+m_PosX,y+m_PosY,m_Width,m_Height);
 371 #endif
 372
 373     bool drawSelectionAfterCell = false;
 374
 375     if ( info.GetState().GetSelectionState() == wxHTML_SEL_CHANGING )
 376     {
 377         // Selection changing, we must draw the word piecewise:
 378         wxHtmlSelection *s = info.GetSelection();
 379         wxString txt;
 380         int w, h;
 381         int ofs = 0;
 382
 383         wxPoint priv = (this == s->GetFromCell()) ?
 384                            s->GetFromPrivPos() : s->GetToPrivPos();
 385
 386         // NB: this is quite a hack: in order to compute selection boundaries
 387         //     (in word's characters) we must know current font, which is only
 388         //     possible inside rendering code. Therefore we update the
 389         //     information here and store it in wxHtmlSelection so that
 390         //     ConvertToText can use it later:
 391         if ( priv == wxDefaultPosition )
 392         {
 393             SetSelectionPrivPos(dc, s);
 394             priv = (this == s->GetFromCell()) ?
 395                     s->GetFromPrivPos() : s->GetToPrivPos();
 396         }
 397
 398         int part1 = priv.x;
 399         int part2 = priv.y;
 400
 401         if ( part1 > 0 )
 402         {
 403             txt = m_Word.Mid(0, part1);
 404             dc.DrawText(txt, x + m_PosX, y + m_PosY);
 405             dc.GetTextExtent(txt, &w, &h);
 406             ofs += w;
 407         }
 408
 409         SwitchSelState(dc, info, true);
 410
 411         txt = m_Word.Mid(part1, part2-part1);
 412         dc.DrawText(txt, ofs + x + m_PosX, y + m_PosY);
 413
 414         if ( (size_t)part2 < m_Word.length() )
 415         {
 416             dc.GetTextExtent(txt, &w, &h);
 417             ofs += w;
 418             SwitchSelState(dc, info, false);
 419             txt = m_Word.Mid(part2);
 420             dc.DrawText(txt, ofs + x + m_PosX, y + m_PosY);
 421         }
 422         else
 423             drawSelectionAfterCell = true;
 424     }
 425     else
 426     {
 427         wxHtmlSelectionState selstate = info.GetState().GetSelectionState();
 428         // Not changing selection state, draw the word in single mode:
 429         if ( selstate != wxHTML_SEL_OUT &&
 430              dc.GetBackgroundMode() != wxSOLID )
 431         {
 432             SwitchSelState(dc, info, true);
 433         }
 434         else if ( selstate == wxHTML_SEL_OUT &&
 435                   dc.GetBackgroundMode() == wxSOLID )
 436         {
 437             SwitchSelState(dc, info, false);
 438         }
 439         dc.DrawText(m_Word, x + m_PosX, y + m_PosY);
 440         drawSelectionAfterCell = (selstate != wxHTML_SEL_OUT);
 441     }
 442
 443     // NB: If the text is justified then there is usually some free space
 444     //     between adjacent cells and drawing the selection only onto cells
 445     //     would result in ugly unselected spaces. The code below detects
 446     //     this special case and renders the selection *outside* the sell,
 447     //     too.
 448     if ( m_Parent->GetAlignHor() == wxHTML_ALIGN_JUSTIFY &&
 449          drawSelectionAfterCell )
 450     {
 451         wxHtmlCell *nextCell = m_Next;
 452         while ( nextCell && nextCell->IsFormattingCell() )
 453             nextCell = nextCell->GetNext();
 454         if ( nextCell )
 455         {
 456             int nextX = nextCell->GetPosX();
 457             if ( m_PosX + m_Width < nextX )
 458             {
 459                 dc.SetBrush(dc.GetBackground());
 460                 dc.SetPen(*wxTRANSPARENT_PEN);
 461                 dc.DrawRectangle(x + m_PosX + m_Width, y + m_PosY,
 462                                  nextX - m_PosX - m_Width, m_Height);
 463             }
 464         }
 465     }
 466 }
 467
 468
 469 wxString wxHtmlWordCell::ConvertToText(wxHtmlSelection *s) const
 470 {
 471     if ( s && (this == s->GetFromCell() || this == s->GetToCell()) )
 472     {
 473         wxPoint priv = this == s->GetFromCell() ? s->GetFromPrivPos()
 474                                                 : s->GetToPrivPos();
 475
 476         // VZ: we may be called before we had a chance to re-render ourselves
 477         //     and in this case GetFrom/ToPrivPos() is not set yet -- assume
 478         //     that this only happens in case of a double/triple click (which
 479         //     seems to be the case now) and so it makes sense to select the
 480         //     entire contents of the cell in this case
 481         //
 482         // TODO: but this really needs to be fixed in some better way later...
 483         if ( priv != wxDefaultPosition )
 484         {
 485             int part1 = priv.x;
 486             int part2 = priv.y;
 487             return m_Word.Mid(part1, part2-part1);
 488         }
 489         //else: return the whole word below
 490     }
 491
 492     return m_Word;
 493 }
 494
 495 wxCursor wxHtmlWordCell::GetCursor() const
 496 {
 497     if ( !GetLink() )
 498     {
 499         if ( !gs_cursorText )
 500             gs_cursorText = new wxCursor(wxCURSOR_IBEAM);
 501         return *gs_cursorText;
 502     }
 503     else
 504         return wxHtmlCell::GetCursor();
 505 }
 506
 507
 508 //-----------------------------------------------------------------------------
 509 // wxHtmlContainerCell
 510 //-----------------------------------------------------------------------------
 511
 512
 513 wxHtmlContainerCell::wxHtmlContainerCell(wxHtmlContainerCell *parent) : wxHtmlCell()
 514 {
 515     m_Cells = m_LastCell = NULL;
 516     m_Parent = parent;
 517     if (m_Parent) m_Parent->InsertCell(this);
 518     m_AlignHor = wxHTML_ALIGN_LEFT;
 519     m_AlignVer = wxHTML_ALIGN_BOTTOM;
 520     m_IndentLeft = m_IndentRight = m_IndentTop = m_IndentBottom = 0;
 521     m_WidthFloat = 100; m_WidthFloatUnits = wxHTML_UNITS_PERCENT;
 522     m_UseBkColour = FALSE;
 523     m_UseBorder = FALSE;
 524     m_MinHeight = 0;
 525     m_MinHeightAlign = wxHTML_ALIGN_TOP;
 526     m_LastLayout = -1;
 527 }
 528
 529 wxHtmlContainerCell::~wxHtmlContainerCell()
 530 {
 531     wxHtmlCell *cell = m_Cells;
 532     while ( cell )
 533     {
 534         wxHtmlCell *cellNext = cell->GetNext();
 535         delete cell;
 536         cell = cellNext;
 537     }
 538 }
 539
 540
 541
 542 void wxHtmlContainerCell::SetIndent(int i, int what, int units)
 543 {
 544     int val = (units == wxHTML_UNITS_PIXELS) ? i : -i;
 545     if (what & wxHTML_INDENT_LEFT) m_IndentLeft = val;
 546     if (what & wxHTML_INDENT_RIGHT) m_IndentRight = val;
 547     if (what & wxHTML_INDENT_TOP) m_IndentTop = val;
 548     if (what & wxHTML_INDENT_BOTTOM) m_IndentBottom = val;
 549     m_LastLayout = -1;
 550 }
 551
 552
 553
 554 int wxHtmlContainerCell::GetIndent(int ind) const
 555 {
 556     if (ind & wxHTML_INDENT_LEFT) return m_IndentLeft;
 557     else if (ind & wxHTML_INDENT_RIGHT) return m_IndentRight;
 558     else if (ind & wxHTML_INDENT_TOP) return m_IndentTop;
 559     else if (ind & wxHTML_INDENT_BOTTOM) return m_IndentBottom;
 560     else return -1; /* BUG! Should not be called... */
 561 }
 562
 563
 564
 565
 566 int wxHtmlContainerCell::GetIndentUnits(int ind) const
 567 {
 568     bool p = FALSE;
 569     if (ind & wxHTML_INDENT_LEFT) p = m_IndentLeft < 0;
 570     else if (ind & wxHTML_INDENT_RIGHT) p = m_IndentRight < 0;
 571     else if (ind & wxHTML_INDENT_TOP) p = m_IndentTop < 0;
 572     else if (ind & wxHTML_INDENT_BOTTOM) p = m_IndentBottom < 0;
 573     if (p) return wxHTML_UNITS_PERCENT;
 574     else return wxHTML_UNITS_PIXELS;
 575 }
 576
 577
 578
 579 bool wxHtmlContainerCell::AdjustPagebreak(int *pagebreak, int* known_pagebreaks, int number_of_pages) const
 580 {
 581     if (!m_CanLiveOnPagebreak)
 582         return wxHtmlCell::AdjustPagebreak(pagebreak, known_pagebreaks, number_of_pages);
 583
 584     else
 585     {
 586         wxHtmlCell *c = GetFirstChild();
 587         bool rt = FALSE;
 588         int pbrk = *pagebreak - m_PosY;
 589
 590         while (c)
 591         {
 592             if (c->AdjustPagebreak(&pbrk, known_pagebreaks, number_of_pages))
 593                 rt = TRUE;
 594             c = c->GetNext();
 595         }
 596         if (rt)
 597             *pagebreak = pbrk + m_PosY;
 598         return rt;
 599     }
 600 }
 601
 602
 603
 604 void wxHtmlContainerCell::Layout(int w)
 605 {
 606     wxHtmlCell::Layout(w);
 607
 608     if (m_LastLayout == w) return;
 609
 610     // VS: Any attempt to layout with negative or zero width leads to hell,
 611     // but we can't ignore such attempts completely, since it sometimes
 612     // happen (e.g. when trying how small a table can be). The best thing we
 613     // can do is to set the width of child cells to zero
 614     if (w < 1)
 615     {
 616        m_Width = 0;
 617        for (wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext())
 618             cell->Layout(0);
 619             // this does two things: it recursively calls this code on all
 620             // child contrainers and resets children's position to (0,0)
 621        return;
 622     }
 623
 624     wxHtmlCell *cell = m_Cells, *line = m_Cells;
 625     long xpos = 0, ypos = m_IndentTop;
 626     int xdelta = 0, ybasicpos = 0, ydiff;
 627     int s_width, s_indent;
 628     int ysizeup = 0, ysizedown = 0;
 629     int MaxLineWidth = 0;
 630     int xcnt = 0;
 631
 632
 633     /*
 634
 635     WIDTH ADJUSTING :
 636
 637     */
 638
 639     if (m_WidthFloatUnits == wxHTML_UNITS_PERCENT)
 640     {
 641         if (m_WidthFloat < 0) m_Width = (100 + m_WidthFloat) * w / 100;
 642         else m_Width = m_WidthFloat * w / 100;
 643     }
 644     else
 645     {
 646         if (m_WidthFloat < 0) m_Width = w + m_WidthFloat;
 647         else m_Width = m_WidthFloat;
 648     }
 649
 650     if (m_Cells)
 651     {
 652         int l = (m_IndentLeft < 0) ? (-m_IndentLeft * m_Width / 100) : m_IndentLeft;
 653         int r = (m_IndentRight < 0) ? (-m_IndentRight * m_Width / 100) : m_IndentRight;
 654         for (wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext())
 655             cell->Layout(m_Width - (l + r));
 656     }
 657
 658     /*
 659
 660     LAYOUTING :
 661
 662     */
 663
 664     // adjust indentation:
 665     s_indent = (m_IndentLeft < 0) ? (-m_IndentLeft * m_Width / 100) : m_IndentLeft;
 666     s_width = m_Width - s_indent - ((m_IndentRight < 0) ? (-m_IndentRight * m_Width / 100) : m_IndentRight);
 667
 668     // my own layouting:
 669     while (cell != NULL)
 670     {
 671         switch (m_AlignVer)
 672         {
 673             case wxHTML_ALIGN_TOP :      ybasicpos = 0; break;
 674             case wxHTML_ALIGN_BOTTOM :   ybasicpos = - cell->GetHeight(); break;
 675             case wxHTML_ALIGN_CENTER :   ybasicpos = - cell->GetHeight() / 2; break;
 676         }
 677         ydiff = cell->GetHeight() + ybasicpos;
 678
 679         if (cell->GetDescent() + ydiff > ysizedown) ysizedown = cell->GetDescent() + ydiff;
 680         if (ybasicpos + cell->GetDescent() < -ysizeup) ysizeup = - (ybasicpos + cell->GetDescent());
 681
 682         cell->SetPos(xpos, ybasicpos + cell->GetDescent());
 683         xpos += cell->GetWidth();
 684         cell = cell->GetNext();
 685         xcnt++;
 686
 687         // force new line if occured:
 688         if ((cell == NULL) || (xpos + cell->GetWidth() > s_width))
 689         {
 690             if (xpos > MaxLineWidth) MaxLineWidth = xpos;
 691             if (ysizeup < 0) ysizeup = 0;
 692             if (ysizedown < 0) ysizedown = 0;
 693             switch (m_AlignHor) {
 694                 case wxHTML_ALIGN_LEFT :
 695                 case wxHTML_ALIGN_JUSTIFY :
 696                          xdelta = 0;
 697                          break;
 698                 case wxHTML_ALIGN_RIGHT :
 699                          xdelta = 0 + (s_width - xpos);
 700                          break;
 701                 case wxHTML_ALIGN_CENTER :
 702                          xdelta = 0 + (s_width - xpos) / 2;
 703                          break;
 704             }
 705             if (xdelta < 0) xdelta = 0;
 706             xdelta += s_indent;
 707
 708             ypos += ysizeup;
 709
 710             if (m_AlignHor != wxHTML_ALIGN_JUSTIFY || cell == NULL)
 711                 while (line != cell)
 712                 {
 713                     line->SetPos(line->GetPosX() + xdelta,
 714                                    ypos + line->GetPosY());
 715                     line = line->GetNext();
 716                 }
 717             else
 718             {
 719                 int counter = 0;
 720                 int step = (s_width - xpos);
 721                 if (step < 0) step = 0;
 722                 xcnt--;
 723                 if (xcnt > 0) while (line != cell)
 724                 {
 725                     line->SetPos(line->GetPosX() + s_indent +
 726                                    (counter++ * step / xcnt),
 727                                    ypos + line->GetPosY());
 728                     line = line->GetNext();
 729                 }
 730                 xcnt++;
 731             }
 732
 733             ypos += ysizedown;
 734             xpos = xcnt = 0;
 735             ysizeup = ysizedown = 0;
 736             line = cell;
 737         }
 738     }
 739
 740     // setup height & width, depending on container layout:
 741     m_Height = ypos + (ysizedown + ysizeup) + m_IndentBottom;
 742
 743     if (m_Height < m_MinHeight)
 744     {
 745         if (m_MinHeightAlign != wxHTML_ALIGN_TOP)
 746         {
 747             int diff = m_MinHeight - m_Height;
 748             if (m_MinHeightAlign == wxHTML_ALIGN_CENTER) diff /= 2;
 749             cell = m_Cells;
 750             while (cell)
 751             {
 752                 cell->SetPos(cell->GetPosX(), cell->GetPosY() + diff);
 753                 cell = cell->GetNext();
 754             }
 755         }
 756         m_Height = m_MinHeight;
 757     }
 758
 759     MaxLineWidth += s_indent + ((m_IndentRight < 0) ? (-m_IndentRight * m_Width / 100) : m_IndentRight);
 760     if (m_Width < MaxLineWidth) m_Width = MaxLineWidth;
 761
 762     m_LastLayout = w;
 763 }
 764
 765 void wxHtmlContainerCell::UpdateRenderingStatePre(wxHtmlRenderingInfo& info,
 766                                                   wxHtmlCell *cell) const
 767 {
 768     wxHtmlSelection *s = info.GetSelection();
 769     if (!s) return;
 770     if (s->GetFromCell() == cell || s->GetToCell() == cell)
 771     {
 772         info.GetState().SetSelectionState(wxHTML_SEL_CHANGING);
 773     }
 774 }
 775
 776 void wxHtmlContainerCell::UpdateRenderingStatePost(wxHtmlRenderingInfo& info,
 777                                                    wxHtmlCell *cell) const
 778 {
 779     wxHtmlSelection *s = info.GetSelection();
 780     if (!s) return;
 781     if (s->GetToCell() == cell)
 782         info.GetState().SetSelectionState(wxHTML_SEL_OUT);
 783     else if (s->GetFromCell() == cell)
 784         info.GetState().SetSelectionState(wxHTML_SEL_IN);
 785 }
 786
 787 #define mMin(a, b) (((a) < (b)) ? (a) : (b))
 788 #define mMax(a, b) (((a) < (b)) ? (b) : (a))
 789
 790 void wxHtmlContainerCell::Draw(wxDC& dc, int x, int y, int view_y1, int view_y2,
 791                                wxHtmlRenderingInfo& info)
 792 {
 793     // container visible, draw it:
 794     if ((y + m_PosY <= view_y2) && (y + m_PosY + m_Height > view_y1))
 795     {
 796         if (m_UseBkColour)
 797         {
 798             wxBrush myb = wxBrush(m_BkColour, wxSOLID);
 799
 800             int real_y1 = mMax(y + m_PosY, view_y1);
 801             int real_y2 = mMin(y + m_PosY + m_Height - 1, view_y2);
 802
 803             dc.SetBrush(myb);
 804             dc.SetPen(*wxTRANSPARENT_PEN);
 805             dc.DrawRectangle(x + m_PosX, real_y1, m_Width, real_y2 - real_y1 + 1);
 806         }
 807
 808         if (m_UseBorder)
 809         {
 810             wxPen mypen1(m_BorderColour1, 1, wxSOLID);
 811             wxPen mypen2(m_BorderColour2, 1, wxSOLID);
 812
 813             dc.SetPen(mypen1);
 814             dc.DrawLine(x + m_PosX, y + m_PosY, x + m_PosX, y + m_PosY + m_Height - 1);
 815             dc.DrawLine(x + m_PosX, y + m_PosY, x + m_PosX + m_Width, y + m_PosY);
 816             dc.SetPen(mypen2);
 817             dc.DrawLine(x + m_PosX + m_Width - 1, y + m_PosY, x + m_PosX +  m_Width - 1, y + m_PosY + m_Height - 1);
 818             dc.DrawLine(x + m_PosX, y + m_PosY + m_Height - 1, x + m_PosX + m_Width, y + m_PosY + m_Height - 1);
 819         }
 820
 821         if (m_Cells)
 822         {
 823             // draw container's contents:
 824             for (wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext())
 825             {
 826                 UpdateRenderingStatePre(info, cell);
 827                 cell->Draw(dc,
 828                            x + m_PosX, y + m_PosY, view_y1, view_y2,
 829                            info);
 830                 UpdateRenderingStatePost(info, cell);
 831             }
 832         }
 833     }
 834     // container invisible, just proceed font+color changing:
 835     else
 836     {
 837         DrawInvisible(dc, x, y, info);
 838     }
 839 }
 840
 841
 842
 843 void wxHtmlContainerCell::DrawInvisible(wxDC& dc, int x, int y,
 844                                         wxHtmlRenderingInfo& info)
 845 {
 846     if (m_Cells)
 847     {
 848         for (wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext())
 849         {
 850             UpdateRenderingStatePre(info, cell);
 851             cell->DrawInvisible(dc, x + m_PosX, y + m_PosY, info);
 852             UpdateRenderingStatePost(info, cell);
 853         }
 854     }
 855 }
 856
 857
 858 wxColour wxHtmlContainerCell::GetBackgroundColour()
 859 {
 860     if (m_UseBkColour)
 861         return m_BkColour;
 862     else
 863         return wxNullColour;
 864 }
 865
 866
 867
 868 wxHtmlLinkInfo *wxHtmlContainerCell::GetLink(int x, int y) const
 869 {
 870     wxHtmlCell *cell = FindCellByPos(x, y);
 871
 872     // VZ: I don't know if we should pass absolute or relative coords to
 873     //     wxHtmlCell::GetLink()? As the base class version just ignores them
 874     //     anyhow, it hardly matters right now but should still be clarified
 875     return cell ? cell->GetLink(x, y) : NULL;
 876 }
 877
 878
 879
 880 void wxHtmlContainerCell::InsertCell(wxHtmlCell *f)
 881 {
 882     if (!m_Cells) m_Cells = m_LastCell = f;
 883     else
 884     {
 885         m_LastCell->SetNext(f);
 886         m_LastCell = f;
 887         if (m_LastCell) while (m_LastCell->GetNext()) m_LastCell = m_LastCell->GetNext();
 888     }
 889     f->SetParent(this);
 890     m_LastLayout = -1;
 891 }
 892
 893
 894
 895 void wxHtmlContainerCell::SetAlign(const wxHtmlTag& tag)
 896 {
 897     if (tag.HasParam(wxT("ALIGN")))
 898     {
 899         wxString alg = tag.GetParam(wxT("ALIGN"));
 900         alg.MakeUpper();
 901         if (alg == wxT("CENTER"))
 902             SetAlignHor(wxHTML_ALIGN_CENTER);
 903         else if (alg == wxT("LEFT"))
 904             SetAlignHor(wxHTML_ALIGN_LEFT);
 905         else if (alg == wxT("JUSTIFY"))
 906             SetAlignHor(wxHTML_ALIGN_JUSTIFY);
 907         else if (alg == wxT("RIGHT"))
 908             SetAlignHor(wxHTML_ALIGN_RIGHT);
 909         m_LastLayout = -1;
 910     }
 911 }
 912
 913
 914
 915 void wxHtmlContainerCell::SetWidthFloat(const wxHtmlTag& tag, double pixel_scale)
 916 {
 917     if (tag.HasParam(wxT("WIDTH")))
 918     {
 919         int wdi;
 920         wxString wd = tag.GetParam(wxT("WIDTH"));
 921
 922         if (wd[wd.Length()-1] == wxT('%'))
 923         {
 924             wxSscanf(wd.c_str(), wxT("%i%%"), &wdi);
 925             SetWidthFloat(wdi, wxHTML_UNITS_PERCENT);
 926         }
 927         else
 928         {
 929             wxSscanf(wd.c_str(), wxT("%i"), &wdi);
 930             SetWidthFloat((int)(pixel_scale * (double)wdi), wxHTML_UNITS_PIXELS);
 931         }
 932         m_LastLayout = -1;
 933     }
 934 }
 935
 936
 937
 938 const wxHtmlCell* wxHtmlContainerCell::Find(int condition, const void* param) const
 939 {
 940     if (m_Cells)
 941     {
 942         const wxHtmlCell *r = NULL;
 943
 944         for (wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext())
 945         {
 946             r = cell->Find(condition, param);
 947             if (r) return r;
 948         }
 949     }
 950     return NULL;
 951 }
 952
 953
 954 wxHtmlCell *wxHtmlContainerCell::FindCellByPos(wxCoord x, wxCoord y,
 955                                                unsigned flags) const
 956 {
 957     if ( flags & wxHTML_FIND_EXACT )
 958     {
 959         for ( const wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext() )
 960         {
 961             int cx = cell->GetPosX(),
 962                 cy = cell->GetPosY();
 963
 964             if ( (cx <= x) && (cx + cell->GetWidth() > x) &&
 965                  (cy <= y) && (cy + cell->GetHeight() > y) )
 966             {
 967                 return cell->FindCellByPos(x - cx, y - cy, flags);
 968             }
 969         }
 970     }
 971     else if ( flags & wxHTML_FIND_NEAREST_AFTER )
 972     {
 973         wxHtmlCell *c;
 974         int y2;
 975         for ( const wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext() )
 976         {
 977             y2 = cell->GetPosY() + cell->GetHeight() - 1;
 978             if (y2 < y || (y2 == y && cell->GetPosX()+cell->GetWidth()-1 < x))
 979                 continue;
 980             c = cell->FindCellByPos(x - cell->GetPosX(), y - cell->GetPosY(),
 981                                     flags);
 982             if (c) return c;
 983         }
 984     }
 985     else if ( flags & wxHTML_FIND_NEAREST_BEFORE )
 986     {
 987         wxHtmlCell *c2, *c = NULL;
 988         for ( const wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext() )
 989         {
 990             if (cell->GetPosY() > y ||
 991                     (cell->GetPosY() == y && cell->GetPosX() > x))
 992                 break;
 993             c2 = cell->FindCellByPos(x - cell->GetPosX(), y - cell->GetPosY(),
 994                                      flags);
 995             if (c2)
 996                 c = c2;
 997         }
 998         if (c) return c;
 999     }
1000
1001     return NULL;
1002 }
1003
1004
1005 void wxHtmlContainerCell::OnMouseClick(wxWindow *parent, int x, int y, const wxMouseEvent& event)
1006 {
1007     wxHtmlCell *cell = FindCellByPos(x, y);
1008     if ( cell )
1009         cell->OnMouseClick(parent, x, y, event);
1010 }
1011
1012
1013
1014 void wxHtmlContainerCell::GetHorizontalConstraints(int *left, int *right) const
1015 {
1016     int cleft = m_PosX + m_Width, cright = m_PosX; // worst case
1017     int l, r;
1018
1019     for (wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext())
1020     {
1021         cell->GetHorizontalConstraints(&l, &r);
1022         if (l < cleft)
1023             cleft = l;
1024         if (r > cright)
1025             cright = r;
1026     }
1027
1028     cleft -= (m_IndentLeft < 0) ? (-m_IndentLeft * m_Width / 100) : m_IndentLeft;
1029     cright += (m_IndentRight < 0) ? (-m_IndentRight * m_Width / 100) : m_IndentRight;
1030
1031     if (left)
1032         *left = cleft;
1033     if (right)
1034         *right = cright;
1035 }
1036
1037
1038 wxHtmlCell *wxHtmlContainerCell::GetFirstTerminal() const
1039 {
1040     if ( m_Cells )
1041     {
1042         wxHtmlCell *c2;
1043         for (wxHtmlCell *c = m_Cells; c; c = c->GetNext())
1044         {
1045             c2 = c->GetFirstTerminal();
1046             if ( c2 )
1047                 return c2;
1048         }
1049     }
1050     return NULL;
1051 }
1052
1053 wxHtmlCell *wxHtmlContainerCell::GetLastTerminal() const
1054 {
1055     if ( m_Cells )
1056     {
1057         // most common case first:
1058         wxHtmlCell *c = m_LastCell->GetLastTerminal();
1059         if ( c )
1060             return c;
1061
1062         wxHtmlCell *c2 = NULL;
1063         for (c = m_Cells; c; c = c->GetNext())
1064             c2 = c->GetLastTerminal();
1065         return c2;
1066     }
1067     else
1068         return NULL;
1069 }
1070
1071
1072
1073
1074 // --------------------------------------------------------------------------
1075 // wxHtmlColourCell
1076 // --------------------------------------------------------------------------
1077
1078 void wxHtmlColourCell::Draw(wxDC& dc,
1079                             int x, int y,
1080                             int WXUNUSED(view_y1), int WXUNUSED(view_y2),
1081                             wxHtmlRenderingInfo& info)
1082 {
1083     DrawInvisible(dc, x, y, info);
1084 }
1085
1086 void wxHtmlColourCell::DrawInvisible(wxDC& dc,
1087                                      int WXUNUSED(x), int WXUNUSED(y),
1088                                      wxHtmlRenderingInfo& info)
1089 {
1090     wxHtmlRenderingState& state = info.GetState();
1091     if (m_Flags & wxHTML_CLR_FOREGROUND)
1092     {
1093         state.SetFgColour(m_Colour);
1094         if (state.GetSelectionState() != wxHTML_SEL_IN)
1095             dc.SetTextForeground(m_Colour);
1096         else
1097             dc.SetTextForeground(
1098                     info.GetStyle().GetSelectedTextColour(m_Colour));
1099     }
1100     if (m_Flags & wxHTML_CLR_BACKGROUND)
1101     {
1102         state.SetBgColour(m_Colour);
1103         if (state.GetSelectionState() != wxHTML_SEL_IN)
1104         {
1105             dc.SetTextBackground(m_Colour);
1106             dc.SetBackground(wxBrush(m_Colour, wxSOLID));
1107         }
1108         else
1109         {
1110             wxColour c = info.GetStyle().GetSelectedTextBgColour(m_Colour);
1111             dc.SetTextBackground(c);
1112             dc.SetBackground(wxBrush(c, wxSOLID));
1113         }
1114     }
1115 }
1116
1117
1118
1119
1120 // ---------------------------------------------------------------------------
1121 // wxHtmlFontCell
1122 // ---------------------------------------------------------------------------
1123
1124 void wxHtmlFontCell::Draw(wxDC& dc,
1125                           int WXUNUSED(x), int WXUNUSED(y),
1126                           int WXUNUSED(view_y1), int WXUNUSED(view_y2),
1127                           wxHtmlRenderingInfo& WXUNUSED(info))
1128 {
1129     dc.SetFont(m_Font);
1130 }
1131
1132 void wxHtmlFontCell::DrawInvisible(wxDC& dc, int WXUNUSED(x), int WXUNUSED(y),
1133                                    wxHtmlRenderingInfo& WXUNUSED(info))
1134 {
1135     dc.SetFont(m_Font);
1136 }
1137
1138
1139
1140
1141
1142
1143
1144
1145 // ---------------------------------------------------------------------------
1146 // wxHtmlWidgetCell
1147 // ---------------------------------------------------------------------------
1148
1149 wxHtmlWidgetCell::wxHtmlWidgetCell(wxWindow *wnd, int w)
1150 {
1151     int sx, sy;
1152     m_Wnd = wnd;
1153     m_Wnd->GetSize(&sx, &sy);
1154     m_Width = sx, m_Height = sy;
1155     m_WidthFloat = w;
1156 }
1157
1158
1159 void wxHtmlWidgetCell::Draw(wxDC& WXUNUSED(dc),
1160                             int WXUNUSED(x), int WXUNUSED(y),
1161                             int WXUNUSED(view_y1), int WXUNUSED(view_y2),
1162                             wxHtmlRenderingInfo& WXUNUSED(info))
1163 {
1164     int absx = 0, absy = 0, stx, sty;
1165     wxHtmlCell *c = this;
1166
1167     while (c)
1168     {
1169         absx += c->GetPosX();
1170         absy += c->GetPosY();
1171         c = c->GetParent();
1172     }
1173
1174     ((wxScrolledWindow*)(m_Wnd->GetParent()))->GetViewStart(&stx, &sty);
1175     m_Wnd->SetSize(absx - wxHTML_SCROLL_STEP * stx, absy  - wxHTML_SCROLL_STEP * sty, m_Width, m_Height);
1176 }
1177
1178
1179
1180 void wxHtmlWidgetCell::DrawInvisible(wxDC& WXUNUSED(dc),
1181                                      int WXUNUSED(x), int WXUNUSED(y),
1182                                      wxHtmlRenderingInfo& WXUNUSED(info))
1183 {
1184     int absx = 0, absy = 0, stx, sty;
1185     wxHtmlCell *c = this;
1186
1187     while (c)
1188     {
1189         absx += c->GetPosX();
1190         absy += c->GetPosY();
1191         c = c->GetParent();
1192     }
1193
1194     ((wxScrolledWindow*)(m_Wnd->GetParent()))->GetViewStart(&stx, &sty);
1195     m_Wnd->SetSize(absx - wxHTML_SCROLL_STEP * stx, absy  - wxHTML_SCROLL_STEP * sty, m_Width, m_Height);
1196 }
1197
1198
1199
1200 void wxHtmlWidgetCell::Layout(int w)
1201 {
1202     if (m_WidthFloat != 0)
1203     {
1204         m_Width = (w * m_WidthFloat) / 100;
1205         m_Wnd->SetSize(m_Width, m_Height);
1206     }
1207
1208     wxHtmlCell::Layout(w);
1209 }
1210
1211
1212
1213 // ----------------------------------------------------------------------------
1214 // wxHtmlTerminalCellsInterator
1215 // ----------------------------------------------------------------------------
1216
1217 const wxHtmlCell* wxHtmlTerminalCellsInterator::operator++()
1218 {
1219     if ( !m_pos )
1220         return NULL;
1221
1222     do
1223     {
1224         if ( m_pos == m_to )
1225         {
1226             m_pos = NULL;
1227             return NULL;
1228         }
1229
1230         if ( m_pos->GetNext() )
1231             m_pos = m_pos->GetNext();
1232         else
1233         {
1234             // we must go up the hierarchy until we reach container where this
1235             // is not the last child, and then go down to first terminal cell:
1236             while ( m_pos->GetNext() == NULL )
1237             {
1238                 m_pos = m_pos->GetParent();
1239                 if ( !m_pos )
1240                     return NULL;
1241             }
1242             m_pos = m_pos->GetNext();
1243         }
1244         while ( m_pos->GetFirstChild() != NULL )
1245             m_pos = m_pos->GetFirstChild();
1246     } while ( !m_pos->IsTerminalCell() );
1247
1248     return m_pos;
1249 }
1250
1251
1252
1253
1254
1255
1256
1257 //-----------------------------------------------------------------------------
1258 // Cleanup
1259 //-----------------------------------------------------------------------------
1260
1261 class wxHtmlCellModule: public wxModule
1262 {
1263 DECLARE_DYNAMIC_CLASS(wxHtmlCellModule)
1264 public:
1265     wxHtmlCellModule() : wxModule() {}
1266     bool OnInit() { return true; }
1267     void OnExit()
1268     {
1269         wxDELETE(gs_cursorLink);
1270         wxDELETE(gs_cursorText);
1271     }
1272 };
1273
1274 IMPLEMENT_DYNAMIC_CLASS(wxHtmlCellModule, wxModule)
1275
1276 #endif