src/html/htmlcell.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/html/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 #include "wx/wxprec.h"
  11
  12 #ifdef __BORLANDC__
  13     #pragma hdrstop
  14 #endif
  15
  16 #if wxUSE_HTML && wxUSE_STREAMS
  17
  18 #ifndef WX_PRECOMP
  19     #include "wx/dynarray.h"
  20     #include "wx/brush.h"
  21     #include "wx/colour.h"
  22     #include "wx/dc.h"
  23     #include "wx/settings.h"
  24     #include "wx/module.h"
  25     #include "wx/wxcrtvararg.h"
  26 #endif
  27
  28 #include "wx/html/htmlcell.h"
  29 #include "wx/html/htmlwin.h"
  30
  31 #include <stdlib.h>
  32
  33 //-----------------------------------------------------------------------------
  34 // Helper classes
  35 //-----------------------------------------------------------------------------
  36
  37 void wxHtmlSelection::Set(const wxPoint& fromPos, const wxHtmlCell *fromCell,
  38                           const wxPoint& toPos, const wxHtmlCell *toCell)
  39 {
  40     m_fromCell = fromCell;
  41     m_toCell = toCell;
  42     m_fromPos = fromPos;
  43     m_toPos = toPos;
  44 }
  45
  46 void wxHtmlSelection::Set(const wxHtmlCell *fromCell, const wxHtmlCell *toCell)
  47 {
  48     wxPoint p1 = fromCell ? fromCell->GetAbsPos() : wxDefaultPosition;
  49     wxPoint p2 = toCell ? toCell->GetAbsPos() : wxDefaultPosition;
  50     if ( toCell )
  51     {
  52         p2.x += toCell->GetWidth();
  53         p2.y += toCell->GetHeight();
  54     }
  55     Set(p1, fromCell, p2, toCell);
  56 }
  57
  58 wxColour
  59 wxDefaultHtmlRenderingStyle::
  60 GetSelectedTextColour(const wxColour& WXUNUSED(clr))
  61 {
  62     return wxSystemSettings::GetColour(wxSYS_COLOUR_HIGHLIGHTTEXT);
  63 }
  64
  65 wxColour
  66 wxDefaultHtmlRenderingStyle::
  67 GetSelectedTextBgColour(const wxColour& WXUNUSED(clr))
  68 {
  69     return wxSystemSettings::GetColour(wxSYS_COLOUR_HIGHLIGHT);
  70 }
  71
  72
  73 //-----------------------------------------------------------------------------
  74 // wxHtmlCell
  75 //-----------------------------------------------------------------------------
  76
  77 IMPLEMENT_ABSTRACT_CLASS(wxHtmlCell, wxObject)
  78
  79 wxHtmlCell::wxHtmlCell() : wxObject()
  80 {
  81     m_Next = NULL;
  82     m_Parent = NULL;
  83     m_Width = m_Height = m_Descent = 0;
  84     m_ScriptMode = wxHTML_SCRIPT_NORMAL;        // <sub> or <sup> mode
  85     m_ScriptBaseline = 0;                       // <sub> or <sup> baseline
  86     m_CanLiveOnPagebreak = true;
  87     m_Link = NULL;
  88 }
  89
  90 wxHtmlCell::~wxHtmlCell()
  91 {
  92     delete m_Link;
  93 }
  94
  95 // Update the descent value when whe are in a <sub> or <sup>.
  96 // prevbase is the parent base
  97 void wxHtmlCell::SetScriptMode(wxHtmlScriptMode mode, long previousBase)
  98 {
  99     m_ScriptMode = mode;
 100
 101     if (mode == wxHTML_SCRIPT_SUP)
 102         m_ScriptBaseline = previousBase - (m_Height + 1) / 2;
 103     else if (mode == wxHTML_SCRIPT_SUB)
 104         m_ScriptBaseline = previousBase + (m_Height + 1) / 6;
 105     else
 106         m_ScriptBaseline = 0;
 107
 108     m_Descent += m_ScriptBaseline;
 109 }
 110
 111 #if WXWIN_COMPATIBILITY_2_6
 112
 113 struct wxHtmlCellOnMouseClickCompatHelper;
 114
 115 static wxHtmlCellOnMouseClickCompatHelper *gs_helperOnMouseClick = NULL;
 116
 117 // helper for routing calls to new ProcessMouseClick() method to deprecated
 118 // OnMouseClick() method
 119 struct wxHtmlCellOnMouseClickCompatHelper
 120 {
 121     wxHtmlCellOnMouseClickCompatHelper(wxHtmlWindowInterface *window_,
 122                                        const wxPoint& pos_,
 123                                        const wxMouseEvent& event_)
 124         : window(window_), pos(pos_), event(event_), retval(false)
 125     {
 126     }
 127
 128     bool CallOnMouseClick(wxHtmlCell *cell)
 129     {
 130         wxHtmlCellOnMouseClickCompatHelper *oldHelper = gs_helperOnMouseClick;
 131         gs_helperOnMouseClick = this;
 132         cell->OnMouseClick
 133               (
 134                 window ? window->GetHTMLWindow() : NULL,
 135                 pos.x, pos.y,
 136                 event
 137               );
 138         gs_helperOnMouseClick = oldHelper;
 139         return retval;
 140     }
 141
 142     wxHtmlWindowInterface *window;
 143     const wxPoint& pos;
 144     const wxMouseEvent& event;
 145     bool retval;
 146 };
 147 #endif // WXWIN_COMPATIBILITY_2_6
 148
 149 bool wxHtmlCell::ProcessMouseClick(wxHtmlWindowInterface *window,
 150                                    const wxPoint& pos,
 151                                    const wxMouseEvent& event)
 152 {
 153     wxCHECK_MSG( window, false, _T("window interface must be provided") );
 154
 155 #if WXWIN_COMPATIBILITY_2_6
 156     // NB: this hack puts the body of ProcessMouseClick() into OnMouseClick()
 157     //     (for which it has to pass the arguments and return value via a
 158     //     helper variable because these two methods have different
 159     //     signatures), so that old code overriding OnMouseClick will continue
 160     //     to work
 161     wxHtmlCellOnMouseClickCompatHelper compat(window, pos, event);
 162     return compat.CallOnMouseClick(this);
 163 }
 164
 165 void wxHtmlCell::OnMouseClick(wxWindow *, int, int, const wxMouseEvent& event)
 166 {
 167     wxCHECK_RET( gs_helperOnMouseClick, _T("unexpected call to OnMouseClick") );
 168     wxHtmlWindowInterface *window = gs_helperOnMouseClick->window;
 169     const wxPoint& pos = gs_helperOnMouseClick->pos;
 170 #endif // WXWIN_COMPATIBILITY_2_6
 171
 172     wxHtmlLinkInfo *lnk = GetLink(pos.x, pos.y);
 173     bool retval = false;
 174
 175     if (lnk)
 176     {
 177         wxHtmlLinkInfo lnk2(*lnk);
 178         lnk2.SetEvent(&event);
 179         lnk2.SetHtmlCell(this);
 180
 181         window->OnHTMLLinkClicked(lnk2);
 182         retval = true;
 183     }
 184
 185 #if WXWIN_COMPATIBILITY_2_6
 186     gs_helperOnMouseClick->retval = retval;
 187 #else
 188     return retval;
 189 #endif // WXWIN_COMPATIBILITY_2_6
 190 }
 191
 192 #if WXWIN_COMPATIBILITY_2_6
 193 wxCursor wxHtmlCell::GetCursor() const
 194 {
 195     return wxNullCursor;
 196 }
 197 #endif // WXWIN_COMPATIBILITY_2_6
 198
 199 wxCursor wxHtmlCell::GetMouseCursor(wxHtmlWindowInterface *window) const
 200 {
 201 #if WXWIN_COMPATIBILITY_2_6
 202     // NB: Older versions of wx used GetCursor() virtual method in place of
 203     //     GetMouseCursor(interface). This code ensures that user code that
 204     //     overriden GetCursor() continues to work. The trick is that the base
 205     //     wxHtmlCell::GetCursor() method simply returns wxNullCursor, so we
 206     //     know that GetCursor() was overriden iff it returns valid cursor.
 207     wxCursor cur = GetCursor();
 208     if (cur.Ok())
 209         return cur;
 210 #endif // WXWIN_COMPATIBILITY_2_6
 211
 212     if ( GetLink() )
 213     {
 214         return window->GetHTMLCursor(wxHtmlWindowInterface::HTMLCursor_Link);
 215     }
 216     else
 217     {
 218         return window->GetHTMLCursor(wxHtmlWindowInterface::HTMLCursor_Default);
 219     }
 220 }
 221
 222
 223 bool wxHtmlCell::AdjustPagebreak(int *pagebreak,
 224                                  wxArrayInt& WXUNUSED(known_pagebreaks)) const
 225 {
 226     if ((!m_CanLiveOnPagebreak) &&
 227                 m_PosY < *pagebreak && m_PosY + m_Height > *pagebreak)
 228     {
 229         *pagebreak = m_PosY;
 230         return true;
 231     }
 232
 233     return false;
 234 }
 235
 236
 237
 238 void wxHtmlCell::SetLink(const wxHtmlLinkInfo& link)
 239 {
 240     if (m_Link) delete m_Link;
 241     m_Link = NULL;
 242     if (link.GetHref() != wxEmptyString)
 243         m_Link = new wxHtmlLinkInfo(link);
 244 }
 245
 246
 247 void wxHtmlCell::Layout(int WXUNUSED(w))
 248 {
 249     SetPos(0, 0);
 250 }
 251
 252
 253
 254 const wxHtmlCell* wxHtmlCell::Find(int WXUNUSED(condition), const void* WXUNUSED(param)) const
 255 {
 256     return NULL;
 257 }
 258
 259
 260 wxHtmlCell *wxHtmlCell::FindCellByPos(wxCoord x, wxCoord y,
 261                                       unsigned flags) const
 262 {
 263     if ( x >= 0 && x < m_Width && y >= 0 && y < m_Height )
 264     {
 265         return wxConstCast(this, wxHtmlCell);
 266     }
 267     else
 268     {
 269         if ((flags & wxHTML_FIND_NEAREST_AFTER) &&
 270                 (y < 0 || (y < 0+m_Height && x < 0+m_Width)))
 271             return wxConstCast(this, wxHtmlCell);
 272         else if ((flags & wxHTML_FIND_NEAREST_BEFORE) &&
 273                 (y >= 0+m_Height || (y >= 0 && x >= 0)))
 274             return wxConstCast(this, wxHtmlCell);
 275         else
 276             return NULL;
 277     }
 278 }
 279
 280
 281 wxPoint wxHtmlCell::GetAbsPos(wxHtmlCell *rootCell) const
 282 {
 283     wxPoint p(m_PosX, m_PosY);
 284     for (wxHtmlCell *parent = m_Parent; parent && parent != rootCell;
 285          parent = parent->m_Parent)
 286     {
 287         p.x += parent->m_PosX;
 288         p.y += parent->m_PosY;
 289     }
 290     return p;
 291 }
 292
 293 wxHtmlCell *wxHtmlCell::GetRootCell() const
 294 {
 295     wxHtmlCell *c = wxConstCast(this, wxHtmlCell);
 296     while ( c->m_Parent )
 297         c = c->m_Parent;
 298     return c;
 299 }
 300
 301 unsigned wxHtmlCell::GetDepth() const
 302 {
 303     unsigned d = 0;
 304     for (wxHtmlCell *p = m_Parent; p; p = p->m_Parent)
 305         d++;
 306     return d;
 307 }
 308
 309 bool wxHtmlCell::IsBefore(wxHtmlCell *cell) const
 310 {
 311     const wxHtmlCell *c1 = this;
 312     const wxHtmlCell *c2 = cell;
 313     unsigned d1 = GetDepth();
 314     unsigned d2 = cell->GetDepth();
 315
 316     if ( d1 > d2 )
 317         for (; d1 != d2; d1-- )
 318             c1 = c1->m_Parent;
 319     else if ( d1 < d2 )
 320         for (; d1 != d2; d2-- )
 321             c2 = c2->m_Parent;
 322
 323     if ( cell == this )
 324         return true;
 325
 326     while ( c1 && c2 )
 327     {
 328         if ( c1->m_Parent == c2->m_Parent )
 329         {
 330             while ( c1 )
 331             {
 332                 if ( c1 == c2 )
 333                     return true;
 334                 c1 = c1->GetNext();
 335             }
 336             return false;
 337         }
 338         else
 339         {
 340             c1 = c1->m_Parent;
 341             c2 = c2->m_Parent;
 342         }
 343     }
 344
 345     wxFAIL_MSG(_T("Cells are in different trees"));
 346     return false;
 347 }
 348
 349
 350 //-----------------------------------------------------------------------------
 351 // wxHtmlWordCell
 352 //-----------------------------------------------------------------------------
 353
 354 IMPLEMENT_ABSTRACT_CLASS(wxHtmlWordCell, wxHtmlCell)
 355
 356 wxHtmlWordCell::wxHtmlWordCell(const wxString& word, const wxDC& dc) : wxHtmlCell()
 357 {
 358     m_Word = word;
 359     wxCoord w, h, d;
 360     dc.GetTextExtent(m_Word, &w, &h, &d);
 361     m_Width = w;
 362     m_Height = h;
 363     m_Descent = d;
 364     SetCanLiveOnPagebreak(false);
 365     m_allowLinebreak = true;
 366 }
 367
 368 void wxHtmlWordCell::SetPreviousWord(wxHtmlWordCell *cell)
 369 {
 370     if ( cell && m_Parent == cell->m_Parent &&
 371          !wxIsspace(cell->m_Word.Last()) && !wxIsspace(m_Word[0u]) )
 372     {
 373         m_allowLinebreak = false;
 374     }
 375 }
 376
 377 // Splits m_Word into up to three parts according to selection, returns
 378 // substring before, in and after selection and the points (in relative coords)
 379 // where s2 and s3 start:
 380 void wxHtmlWordCell::Split(const wxDC& dc,
 381                            const wxPoint& selFrom, const wxPoint& selTo,
 382                            unsigned& pos1, unsigned& pos2) const
 383 {
 384     wxPoint pt1 = (selFrom == wxDefaultPosition) ?
 385                    wxDefaultPosition : selFrom - GetAbsPos();
 386     wxPoint pt2 = (selTo == wxDefaultPosition) ?
 387                    wxPoint(m_Width, wxDefaultCoord) : selTo - GetAbsPos();
 388
 389     // if the selection is entirely within this cell, make sure pt1 < pt2 in
 390     // order to make the rest of this function simpler:
 391     if ( selFrom != wxDefaultPosition && selTo != wxDefaultPosition &&
 392          selFrom.x > selTo.x )
 393     {
 394         wxPoint tmp = pt1;
 395         pt1 = pt2;
 396         pt2 = tmp;
 397     }
 398
 399     unsigned len = m_Word.length();
 400     unsigned i = 0;
 401     pos1 = 0;
 402
 403     // adjust for cases when the start/end position is completely
 404     // outside the cell:
 405     if ( pt1.y < 0 )
 406         pt1.x = 0;
 407     if ( pt2.y >= m_Height )
 408         pt2.x = m_Width;
 409
 410     // before selection:
 411     // (include character under caret only if in first half of width)
 412 #ifdef __WXMAC__
 413     // implementation using PartialExtents to support fractional widths
 414     wxArrayInt widths ;
 415     dc.GetPartialTextExtents(m_Word,widths) ;
 416     while( i < len && pt1.x >= widths[i] )
 417         i++ ;
 418     if ( i < len )
 419     {
 420         int charW = (i > 0) ? widths[i] - widths[i-1] : widths[i];
 421         if ( widths[i] - pt1.x < charW/2 )
 422             i++;
 423     }
 424 #else // !__WXMAC__
 425     wxCoord charW, charH;
 426     while ( pt1.x > 0 && i < len )
 427     {
 428         dc.GetTextExtent(m_Word[i], &charW, &charH);
 429         pt1.x -= charW;
 430         if ( pt1.x >= -charW/2 )
 431         {
 432             pos1 += charW;
 433             i++;
 434         }
 435     }
 436 #endif // __WXMAC__/!__WXMAC__
 437
 438     // in selection:
 439     // (include character under caret only if in first half of width)
 440     unsigned j = i;
 441 #ifdef __WXMAC__
 442     while( j < len && pt2.x >= widths[j] )
 443         j++ ;
 444     if ( j < len )
 445     {
 446         int charW = (j > 0) ? widths[j] - widths[j-1] : widths[j];
 447         if ( widths[j] - pt2.x < charW/2 )
 448             j++;
 449     }
 450 #else // !__WXMAC__
 451     pos2 = pos1;
 452     pt2.x -= pos2;
 453     while ( pt2.x > 0 && j < len )
 454     {
 455         dc.GetTextExtent(m_Word[j], &charW, &charH);
 456         pt2.x -= charW;
 457         if ( pt2.x >= -charW/2 )
 458         {
 459             pos2 += charW;
 460             j++;
 461         }
 462     }
 463 #endif // __WXMAC__/!__WXMAC__
 464
 465     pos1 = i;
 466     pos2 = j;
 467
 468     wxASSERT( pos2 >= pos1 );
 469 }
 470
 471 void wxHtmlWordCell::SetSelectionPrivPos(const wxDC& dc, wxHtmlSelection *s) const
 472 {
 473     unsigned p1, p2;
 474
 475     Split(dc,
 476           this == s->GetFromCell() ? s->GetFromPos() : wxDefaultPosition,
 477           this == s->GetToCell() ? s->GetToPos() : wxDefaultPosition,
 478           p1, p2);
 479
 480     wxPoint p(0, m_Word.length());
 481
 482     if ( this == s->GetFromCell() )
 483         p.x = p1; // selection starts here
 484     if ( this == s->GetToCell() )
 485         p.y = p2; // selection ends here
 486
 487     if ( this == s->GetFromCell() )
 488         s->SetFromPrivPos(p);
 489     if ( this == s->GetToCell() )
 490         s->SetToPrivPos(p);
 491 }
 492
 493
 494 static void SwitchSelState(wxDC& dc, wxHtmlRenderingInfo& info,
 495                            bool toSelection)
 496 {
 497     wxColour fg = info.GetState().GetFgColour();
 498     wxColour bg = info.GetState().GetBgColour();
 499
 500     if ( toSelection )
 501     {
 502         dc.SetBackgroundMode(wxBRUSHSTYLE_SOLID);
 503         dc.SetTextForeground(info.GetStyle().GetSelectedTextColour(fg));
 504         dc.SetTextBackground(info.GetStyle().GetSelectedTextBgColour(bg));
 505         dc.SetBackground(wxBrush(info.GetStyle().GetSelectedTextBgColour(bg),
 506                                  wxBRUSHSTYLE_SOLID));
 507     }
 508     else
 509     {
 510         dc.SetBackgroundMode(wxBRUSHSTYLE_TRANSPARENT);
 511         dc.SetTextForeground(fg);
 512         dc.SetTextBackground(bg);
 513         dc.SetBackground(wxBrush(bg, wxBRUSHSTYLE_SOLID));
 514     }
 515 }
 516
 517
 518 void wxHtmlWordCell::Draw(wxDC& dc, int x, int y,
 519                           int WXUNUSED(view_y1), int WXUNUSED(view_y2),
 520                           wxHtmlRenderingInfo& info)
 521 {
 522 #if 0 // useful for debugging
 523     dc.SetPen(*wxBLACK_PEN);
 524     dc.DrawRectangle(x+m_PosX,y+m_PosY,m_Width /* VZ: +1? */ ,m_Height);
 525 #endif
 526
 527     bool drawSelectionAfterCell = false;
 528
 529     if ( info.GetState().GetSelectionState() == wxHTML_SEL_CHANGING )
 530     {
 531         // Selection changing, we must draw the word piecewise:
 532         wxHtmlSelection *s = info.GetSelection();
 533         wxString txt;
 534         int w, h;
 535         int ofs = 0;
 536
 537         wxPoint priv = (this == s->GetFromCell()) ?
 538                            s->GetFromPrivPos() : s->GetToPrivPos();
 539
 540         // NB: this is quite a hack: in order to compute selection boundaries
 541         //     (in word's characters) we must know current font, which is only
 542         //     possible inside rendering code. Therefore we update the
 543         //     information here and store it in wxHtmlSelection so that
 544         //     ConvertToText can use it later:
 545         if ( priv == wxDefaultPosition )
 546         {
 547             SetSelectionPrivPos(dc, s);
 548             priv = (this == s->GetFromCell()) ?
 549                     s->GetFromPrivPos() : s->GetToPrivPos();
 550         }
 551
 552         int part1 = priv.x;
 553         int part2 = priv.y;
 554
 555         if ( part1 > 0 )
 556         {
 557             txt = m_Word.Mid(0, part1);
 558             dc.DrawText(txt, x + m_PosX, y + m_PosY);
 559             dc.GetTextExtent(txt, &w, &h);
 560             ofs += w;
 561         }
 562
 563         SwitchSelState(dc, info, true);
 564
 565         txt = m_Word.Mid(part1, part2-part1);
 566         dc.DrawText(txt, ofs + x + m_PosX, y + m_PosY);
 567
 568         if ( (size_t)part2 < m_Word.length() )
 569         {
 570             dc.GetTextExtent(txt, &w, &h);
 571             ofs += w;
 572             SwitchSelState(dc, info, false);
 573             txt = m_Word.Mid(part2);
 574             dc.DrawText(txt, ofs + x + m_PosX, y + m_PosY);
 575         }
 576         else
 577             drawSelectionAfterCell = true;
 578     }
 579     else
 580     {
 581         wxHtmlSelectionState selstate = info.GetState().GetSelectionState();
 582         // Not changing selection state, draw the word in single mode:
 583         if ( selstate != wxHTML_SEL_OUT &&
 584              dc.GetBackgroundMode() != wxBRUSHSTYLE_SOLID )
 585         {
 586             SwitchSelState(dc, info, true);
 587         }
 588         else if ( selstate == wxHTML_SEL_OUT &&
 589                   dc.GetBackgroundMode() == wxBRUSHSTYLE_SOLID )
 590         {
 591             SwitchSelState(dc, info, false);
 592         }
 593         dc.DrawText(m_Word, x + m_PosX, y + m_PosY);
 594         drawSelectionAfterCell = (selstate != wxHTML_SEL_OUT);
 595     }
 596
 597     // NB: If the text is justified then there is usually some free space
 598     //     between adjacent cells and drawing the selection only onto cells
 599     //     would result in ugly unselected spaces. The code below detects
 600     //     this special case and renders the selection *outside* the sell,
 601     //     too.
 602     if ( m_Parent->GetAlignHor() == wxHTML_ALIGN_JUSTIFY &&
 603          drawSelectionAfterCell )
 604     {
 605         wxHtmlCell *nextCell = m_Next;
 606         while ( nextCell && nextCell->IsFormattingCell() )
 607             nextCell = nextCell->GetNext();
 608         if ( nextCell )
 609         {
 610             int nextX = nextCell->GetPosX();
 611             if ( m_PosX + m_Width < nextX )
 612             {
 613                 dc.SetBrush(dc.GetBackground());
 614                 dc.SetPen(*wxTRANSPARENT_PEN);
 615                 dc.DrawRectangle(x + m_PosX + m_Width, y + m_PosY,
 616                                  nextX - m_PosX - m_Width, m_Height);
 617             }
 618         }
 619     }
 620 }
 621
 622 wxCursor wxHtmlWordCell::GetMouseCursor(wxHtmlWindowInterface *window) const
 623 {
 624     if ( !GetLink() )
 625     {
 626         return window->GetHTMLCursor(wxHtmlWindowInterface::HTMLCursor_Text);
 627     }
 628     else
 629     {
 630         return wxHtmlCell::GetMouseCursor(window);
 631     }
 632 }
 633
 634 wxString wxHtmlWordCell::ConvertToText(wxHtmlSelection *s) const
 635 {
 636     if ( s && (this == s->GetFromCell() || this == s->GetToCell()) )
 637     {
 638         wxPoint priv = this == s->GetFromCell() ? s->GetFromPrivPos()
 639                                                 : s->GetToPrivPos();
 640
 641         // VZ: we may be called before we had a chance to re-render ourselves
 642         //     and in this case GetFrom/ToPrivPos() is not set yet -- assume
 643         //     that this only happens in case of a double/triple click (which
 644         //     seems to be the case now) and so it makes sense to select the
 645         //     entire contents of the cell in this case
 646         //
 647         // TODO: but this really needs to be fixed in some better way later...
 648         if ( priv != wxDefaultPosition )
 649         {
 650             const int part1 = priv.x;
 651             const int part2 = priv.y;
 652             if ( part1 == part2 )
 653                 return wxEmptyString;
 654             return GetPartAsText(part1, part2);
 655         }
 656         //else: return the whole word below
 657     }
 658
 659     return GetAllAsText();
 660 }
 661
 662 wxString wxHtmlWordWithTabsCell::GetAllAsText() const
 663 {
 664     return m_wordOrig;
 665 }
 666
 667 wxString wxHtmlWordWithTabsCell::GetPartAsText(int begin, int end) const
 668 {
 669     // NB: The 'begin' and 'end' positions are in the _displayed_ text
 670     //     (stored in m_Word) and not in the text with tabs that should
 671     //     be copied to clipboard (m_wordOrig).
 672     //
 673     // NB: Because selection is performed on displayed text, it's possible
 674     //     to select e.g. "half of TAB character" -- IOW, 'begin' and 'end'
 675     //     may be in the middle of TAB character expansion into ' 's. In this
 676     //     case, we copy the TAB character to clipboard once.
 677
 678     wxASSERT( begin < end );
 679
 680     const unsigned SPACES_PER_TAB = 8;
 681
 682     wxString sel;
 683
 684     int pos = 0;
 685     wxString::const_iterator i = m_wordOrig.begin();
 686
 687     // find the beginning of text to copy:
 688     for ( ; pos < begin; ++i )
 689     {
 690         if ( *i == '\t' )
 691         {
 692             pos += 8 - (m_linepos + pos) % SPACES_PER_TAB;
 693             if ( pos >= begin )
 694             {
 695                 sel += '\t';
 696             }
 697         }
 698         else
 699         {
 700             ++pos;
 701         }
 702     }
 703
 704     // copy the content until we reach 'end':
 705     for ( ; pos < end; ++i )
 706     {
 707         const wxChar c = *i;
 708         sel += c;
 709
 710         if ( c == '\t' )
 711             pos += 8 - (m_linepos + pos) % SPACES_PER_TAB;
 712         else
 713             ++pos;
 714     }
 715
 716     return sel;
 717 }
 718
 719
 720
 721 //-----------------------------------------------------------------------------
 722 // wxHtmlContainerCell
 723 //-----------------------------------------------------------------------------
 724
 725 IMPLEMENT_ABSTRACT_CLASS(wxHtmlContainerCell, wxHtmlCell)
 726
 727 wxHtmlContainerCell::wxHtmlContainerCell(wxHtmlContainerCell *parent) : wxHtmlCell()
 728 {
 729     m_Cells = m_LastCell = NULL;
 730     m_Parent = parent;
 731     m_MaxTotalWidth = 0;
 732     if (m_Parent) m_Parent->InsertCell(this);
 733     m_AlignHor = wxHTML_ALIGN_LEFT;
 734     m_AlignVer = wxHTML_ALIGN_BOTTOM;
 735     m_IndentLeft = m_IndentRight = m_IndentTop = m_IndentBottom = 0;
 736     m_WidthFloat = 100; m_WidthFloatUnits = wxHTML_UNITS_PERCENT;
 737     m_UseBkColour = false;
 738     m_UseBorder = false;
 739     m_MinHeight = 0;
 740     m_MinHeightAlign = wxHTML_ALIGN_TOP;
 741     m_LastLayout = -1;
 742 }
 743
 744 wxHtmlContainerCell::~wxHtmlContainerCell()
 745 {
 746     wxHtmlCell *cell = m_Cells;
 747     while ( cell )
 748     {
 749         wxHtmlCell *cellNext = cell->GetNext();
 750         delete cell;
 751         cell = cellNext;
 752     }
 753 }
 754
 755
 756
 757 void wxHtmlContainerCell::SetIndent(int i, int what, int units)
 758 {
 759     int val = (units == wxHTML_UNITS_PIXELS) ? i : -i;
 760     if (what & wxHTML_INDENT_LEFT) m_IndentLeft = val;
 761     if (what & wxHTML_INDENT_RIGHT) m_IndentRight = val;
 762     if (what & wxHTML_INDENT_TOP) m_IndentTop = val;
 763     if (what & wxHTML_INDENT_BOTTOM) m_IndentBottom = val;
 764     m_LastLayout = -1;
 765 }
 766
 767
 768
 769 int wxHtmlContainerCell::GetIndent(int ind) const
 770 {
 771     if (ind & wxHTML_INDENT_LEFT) return m_IndentLeft;
 772     else if (ind & wxHTML_INDENT_RIGHT) return m_IndentRight;
 773     else if (ind & wxHTML_INDENT_TOP) return m_IndentTop;
 774     else if (ind & wxHTML_INDENT_BOTTOM) return m_IndentBottom;
 775     else return -1; /* BUG! Should not be called... */
 776 }
 777
 778
 779
 780
 781 int wxHtmlContainerCell::GetIndentUnits(int ind) const
 782 {
 783     bool p = false;
 784     if (ind & wxHTML_INDENT_LEFT) p = m_IndentLeft < 0;
 785     else if (ind & wxHTML_INDENT_RIGHT) p = m_IndentRight < 0;
 786     else if (ind & wxHTML_INDENT_TOP) p = m_IndentTop < 0;
 787     else if (ind & wxHTML_INDENT_BOTTOM) p = m_IndentBottom < 0;
 788     if (p) return wxHTML_UNITS_PERCENT;
 789     else return wxHTML_UNITS_PIXELS;
 790 }
 791
 792
 793 bool wxHtmlContainerCell::AdjustPagebreak(int *pagebreak,
 794                                           wxArrayInt& known_pagebreaks) const
 795 {
 796     if (!m_CanLiveOnPagebreak)
 797         return wxHtmlCell::AdjustPagebreak(pagebreak, known_pagebreaks);
 798
 799     wxHtmlCell *c = GetFirstChild();
 800     bool rt = false;
 801     int pbrk = *pagebreak - m_PosY;
 802
 803     while (c)
 804     {
 805         if (c->AdjustPagebreak(&pbrk, known_pagebreaks))
 806             rt = true;
 807         c = c->GetNext();
 808     }
 809     if (rt)
 810         *pagebreak = pbrk + m_PosY;
 811     return rt;
 812 }
 813
 814
 815 void wxHtmlContainerCell::Layout(int w)
 816 {
 817     wxHtmlCell::Layout(w);
 818
 819     if (m_LastLayout == w)
 820         return;
 821     m_LastLayout = w;
 822
 823     // VS: Any attempt to layout with negative or zero width leads to hell,
 824     // but we can't ignore such attempts completely, since it sometimes
 825     // happen (e.g. when trying how small a table can be). The best thing we
 826     // can do is to set the width of child cells to zero
 827     if (w < 1)
 828     {
 829        m_Width = 0;
 830        for (wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext())
 831             cell->Layout(0);
 832             // this does two things: it recursively calls this code on all
 833             // child contrainers and resets children's position to (0,0)
 834        return;
 835     }
 836
 837     wxHtmlCell *nextCell;
 838     long xpos = 0, ypos = m_IndentTop;
 839     int xdelta = 0, ybasicpos = 0, ydiff;
 840     int s_width, nextWordWidth, s_indent;
 841     int ysizeup = 0, ysizedown = 0;
 842     int MaxLineWidth = 0;
 843     int curLineWidth = 0;
 844     m_MaxTotalWidth = 0;
 845
 846
 847     /*
 848
 849     WIDTH ADJUSTING :
 850
 851     */
 852
 853     if (m_WidthFloatUnits == wxHTML_UNITS_PERCENT)
 854     {
 855         if (m_WidthFloat < 0) m_Width = (100 + m_WidthFloat) * w / 100;
 856         else m_Width = m_WidthFloat * w / 100;
 857     }
 858     else
 859     {
 860         if (m_WidthFloat < 0) m_Width = w + m_WidthFloat;
 861         else m_Width = m_WidthFloat;
 862     }
 863
 864     if (m_Cells)
 865     {
 866         int l = (m_IndentLeft < 0) ? (-m_IndentLeft * m_Width / 100) : m_IndentLeft;
 867         int r = (m_IndentRight < 0) ? (-m_IndentRight * m_Width / 100) : m_IndentRight;
 868         for (wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext())
 869             cell->Layout(m_Width - (l + r));
 870     }
 871
 872     /*
 873
 874     LAYOUTING :
 875
 876     */
 877
 878     // adjust indentation:
 879     s_indent = (m_IndentLeft < 0) ? (-m_IndentLeft * m_Width / 100) : m_IndentLeft;
 880     s_width = m_Width - s_indent - ((m_IndentRight < 0) ? (-m_IndentRight * m_Width / 100) : m_IndentRight);
 881
 882     // my own layouting:
 883     wxHtmlCell *cell = m_Cells,
 884                *line = m_Cells;
 885     while (cell != NULL)
 886     {
 887         switch (m_AlignVer)
 888         {
 889             case wxHTML_ALIGN_TOP :      ybasicpos = 0; break;
 890             case wxHTML_ALIGN_BOTTOM :   ybasicpos = - cell->GetHeight(); break;
 891             case wxHTML_ALIGN_CENTER :   ybasicpos = - cell->GetHeight() / 2; break;
 892         }
 893         ydiff = cell->GetHeight() + ybasicpos;
 894
 895         if (cell->GetDescent() + ydiff > ysizedown) ysizedown = cell->GetDescent() + ydiff;
 896         if (ybasicpos + cell->GetDescent() < -ysizeup) ysizeup = - (ybasicpos + cell->GetDescent());
 897
 898         // layout nonbreakable run of cells:
 899         cell->SetPos(xpos, ybasicpos + cell->GetDescent());
 900         xpos += cell->GetWidth();
 901         if (!cell->IsTerminalCell())
 902         {
 903             // Container cell indicates new line
 904             if (curLineWidth > m_MaxTotalWidth)
 905                 m_MaxTotalWidth = curLineWidth;
 906
 907             if (wxMax(cell->GetWidth(), cell->GetMaxTotalWidth()) > m_MaxTotalWidth)
 908                 m_MaxTotalWidth = cell->GetMaxTotalWidth();
 909             curLineWidth = 0;
 910         }
 911         else
 912             // Normal cell, add maximum cell width to line width
 913             curLineWidth += cell->GetMaxTotalWidth();
 914
 915         cell = cell->GetNext();
 916
 917         // compute length of the next word that would be added:
 918         nextWordWidth = 0;
 919         if (cell)
 920         {
 921             nextCell = cell;
 922             do
 923             {
 924                 nextWordWidth += nextCell->GetWidth();
 925                 nextCell = nextCell->GetNext();
 926             } while (nextCell && !nextCell->IsLinebreakAllowed());
 927         }
 928
 929         // force new line if occurred:
 930         if ((cell == NULL) ||
 931             (xpos + nextWordWidth > s_width && cell->IsLinebreakAllowed()))
 932         {
 933             if (xpos > MaxLineWidth) MaxLineWidth = xpos;
 934             if (ysizeup < 0) ysizeup = 0;
 935             if (ysizedown < 0) ysizedown = 0;
 936             switch (m_AlignHor) {
 937                 case wxHTML_ALIGN_LEFT :
 938                 case wxHTML_ALIGN_JUSTIFY :
 939                          xdelta = 0;
 940                          break;
 941                 case wxHTML_ALIGN_RIGHT :
 942                          xdelta = 0 + (s_width - xpos);
 943                          break;
 944                 case wxHTML_ALIGN_CENTER :
 945                          xdelta = 0 + (s_width - xpos) / 2;
 946                          break;
 947             }
 948             if (xdelta < 0) xdelta = 0;
 949             xdelta += s_indent;
 950
 951             ypos += ysizeup;
 952
 953             if (m_AlignHor != wxHTML_ALIGN_JUSTIFY || cell == NULL)
 954             {
 955                 while (line != cell)
 956                 {
 957                     line->SetPos(line->GetPosX() + xdelta,
 958                                    ypos + line->GetPosY());
 959                     line = line->GetNext();
 960                 }
 961             }
 962             else // align == justify
 963             {
 964                 // we have to distribute the extra horz space between the cells
 965                 // on this line
 966
 967                 // an added complication is that some cells have fixed size and
 968                 // shouldn't get any increment (it so happens that these cells
 969                 // also don't allow line break on them which provides with an
 970                 // easy way to test for this) -- and neither should the cells
 971                 // adjacent to them as this could result in a visible space
 972                 // between two cells separated by, e.g. font change, cell which
 973                 // is wrong
 974
 975                 int step = s_width - xpos;
 976                 if ( step > 0 )
 977                 {
 978                     // first count the cells which will get extra space
 979                     int total = -1;
 980
 981                     const wxHtmlCell *c;
 982                     if ( line != cell )
 983                     {
 984                         for ( c = line; c != cell; c = c->GetNext() )
 985                         {
 986                             if ( c->IsLinebreakAllowed() )
 987                             {
 988                                 total++;
 989                             }
 990                         }
 991                     }
 992
 993                     // and now extra space to those cells which merit it
 994                     if ( total )
 995                     {
 996                         // first visible cell on line is not moved:
 997                         while (line !=cell && !line->IsLinebreakAllowed())
 998                         {
 999                             line->SetPos(line->GetPosX() + s_indent,
1000                                          line->GetPosY() + ypos);
1001                             line = line->GetNext();
1002                         }
1003
1004                         if (line != cell)
1005                         {
1006                             line->SetPos(line->GetPosX() + s_indent,
1007                                          line->GetPosY() + ypos);
1008
1009                             line = line->GetNext();
1010                         }
1011
1012                         for ( int n = 0; line != cell; line = line->GetNext() )
1013                         {
1014                             if ( line->IsLinebreakAllowed() )
1015                             {
1016                                 // offset the next cell relative to this one
1017                                 // thus increasing our size
1018                                 n++;
1019                             }
1020
1021                             line->SetPos(line->GetPosX() + s_indent +
1022                                            ((n * step) / total),
1023                                            line->GetPosY() + ypos);
1024                         }
1025                     }
1026                     else
1027                     {
1028                         // this will cause the code to enter "else branch" below:
1029                         step = 0;
1030                     }
1031                 }
1032                 // else branch:
1033                 if ( step <= 0 ) // no extra space to distribute
1034                 {
1035                     // just set the indent properly
1036                     while (line != cell)
1037                     {
1038                         line->SetPos(line->GetPosX() + s_indent,
1039                                      line->GetPosY() + ypos);
1040                         line = line->GetNext();
1041                     }
1042                 }
1043             }
1044
1045             ypos += ysizedown;
1046             xpos = 0;
1047             ysizeup = ysizedown = 0;
1048             line = cell;
1049         }
1050     }
1051
1052     // setup height & width, depending on container layout:
1053     m_Height = ypos + (ysizedown + ysizeup) + m_IndentBottom;
1054
1055     if (m_Height < m_MinHeight)
1056     {
1057         if (m_MinHeightAlign != wxHTML_ALIGN_TOP)
1058         {
1059             int diff = m_MinHeight - m_Height;
1060             if (m_MinHeightAlign == wxHTML_ALIGN_CENTER) diff /= 2;
1061             cell = m_Cells;
1062             while (cell)
1063             {
1064                 cell->SetPos(cell->GetPosX(), cell->GetPosY() + diff);
1065                 cell = cell->GetNext();
1066             }
1067         }
1068         m_Height = m_MinHeight;
1069     }
1070
1071     if (curLineWidth > m_MaxTotalWidth)
1072         m_MaxTotalWidth = curLineWidth;
1073
1074     m_MaxTotalWidth += s_indent + ((m_IndentRight < 0) ? (-m_IndentRight * m_Width / 100) : m_IndentRight);
1075     MaxLineWidth += s_indent + ((m_IndentRight < 0) ? (-m_IndentRight * m_Width / 100) : m_IndentRight);
1076     if (m_Width < MaxLineWidth) m_Width = MaxLineWidth;
1077 }
1078
1079 void wxHtmlContainerCell::UpdateRenderingStatePre(wxHtmlRenderingInfo& info,
1080                                                   wxHtmlCell *cell) const
1081 {
1082     wxHtmlSelection *s = info.GetSelection();
1083     if (!s) return;
1084     if (s->GetFromCell() == cell || s->GetToCell() == cell)
1085     {
1086         info.GetState().SetSelectionState(wxHTML_SEL_CHANGING);
1087     }
1088 }
1089
1090 void wxHtmlContainerCell::UpdateRenderingStatePost(wxHtmlRenderingInfo& info,
1091                                                    wxHtmlCell *cell) const
1092 {
1093     wxHtmlSelection *s = info.GetSelection();
1094     if (!s) return;
1095     if (s->GetToCell() == cell)
1096         info.GetState().SetSelectionState(wxHTML_SEL_OUT);
1097     else if (s->GetFromCell() == cell)
1098         info.GetState().SetSelectionState(wxHTML_SEL_IN);
1099 }
1100
1101 #define mMin(a, b) (((a) < (b)) ? (a) : (b))
1102 #define mMax(a, b) (((a) < (b)) ? (b) : (a))
1103
1104 void wxHtmlContainerCell::Draw(wxDC& dc, int x, int y, int view_y1, int view_y2,
1105                                wxHtmlRenderingInfo& info)
1106 {
1107 #if 0 // useful for debugging
1108     dc.SetPen(*wxRED_PEN);
1109     dc.DrawRectangle(x+m_PosX,y+m_PosY,m_Width,m_Height);
1110 #endif
1111
1112     int xlocal = x + m_PosX;
1113     int ylocal = y + m_PosY;
1114
1115     if (m_UseBkColour)
1116     {
1117         wxBrush myb = wxBrush(m_BkColour, wxBRUSHSTYLE_SOLID);
1118
1119         int real_y1 = mMax(ylocal, view_y1);
1120         int real_y2 = mMin(ylocal + m_Height - 1, view_y2);
1121
1122         dc.SetBrush(myb);
1123         dc.SetPen(*wxTRANSPARENT_PEN);
1124         dc.DrawRectangle(xlocal, real_y1, m_Width, real_y2 - real_y1 + 1);
1125     }
1126
1127     if (m_UseBorder)
1128     {
1129         wxPen mypen1(m_BorderColour1, 1, wxPENSTYLE_SOLID);
1130         wxPen mypen2(m_BorderColour2, 1, wxPENSTYLE_SOLID);
1131
1132         dc.SetPen(mypen1);
1133         dc.DrawLine(xlocal, ylocal, xlocal, ylocal + m_Height - 1);
1134         dc.DrawLine(xlocal, ylocal, xlocal + m_Width, ylocal);
1135         dc.SetPen(mypen2);
1136         dc.DrawLine(xlocal + m_Width - 1, ylocal, xlocal +  m_Width - 1, ylocal + m_Height - 1);
1137         dc.DrawLine(xlocal, ylocal + m_Height - 1, xlocal + m_Width, ylocal + m_Height - 1);
1138     }
1139
1140     if (m_Cells)
1141     {
1142         // draw container's contents:
1143         for (wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext())
1144         {
1145
1146             // optimize drawing: don't render off-screen content:
1147             if ((ylocal + cell->GetPosY() <= view_y2) &&
1148                 (ylocal + cell->GetPosY() + cell->GetHeight() > view_y1))
1149             {
1150                 // the cell is visible, draw it:
1151                 UpdateRenderingStatePre(info, cell);
1152                 cell->Draw(dc,
1153                            xlocal, ylocal, view_y1, view_y2,
1154                            info);
1155                 UpdateRenderingStatePost(info, cell);
1156             }
1157             else
1158             {
1159                 // the cell is off-screen, proceed with font+color+etc.
1160                 // changes only:
1161                 cell->DrawInvisible(dc, xlocal, ylocal, info);
1162             }
1163         }
1164     }
1165 }
1166
1167
1168
1169 void wxHtmlContainerCell::DrawInvisible(wxDC& dc, int x, int y,
1170                                         wxHtmlRenderingInfo& info)
1171 {
1172     if (m_Cells)
1173     {
1174         for (wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext())
1175         {
1176             UpdateRenderingStatePre(info, cell);
1177             cell->DrawInvisible(dc, x + m_PosX, y + m_PosY, info);
1178             UpdateRenderingStatePost(info, cell);
1179         }
1180     }
1181 }
1182
1183
1184 wxColour wxHtmlContainerCell::GetBackgroundColour()
1185 {
1186     if (m_UseBkColour)
1187         return m_BkColour;
1188     else
1189         return wxNullColour;
1190 }
1191
1192
1193
1194 wxHtmlLinkInfo *wxHtmlContainerCell::GetLink(int x, int y) const
1195 {
1196     wxHtmlCell *cell = FindCellByPos(x, y);
1197
1198     // VZ: I don't know if we should pass absolute or relative coords to
1199     //     wxHtmlCell::GetLink()? As the base class version just ignores them
1200     //     anyhow, it hardly matters right now but should still be clarified
1201     return cell ? cell->GetLink(x, y) : NULL;
1202 }
1203
1204
1205
1206 void wxHtmlContainerCell::InsertCell(wxHtmlCell *f)
1207 {
1208     if (!m_Cells) m_Cells = m_LastCell = f;
1209     else
1210     {
1211         m_LastCell->SetNext(f);
1212         m_LastCell = f;
1213         if (m_LastCell) while (m_LastCell->GetNext()) m_LastCell = m_LastCell->GetNext();
1214     }
1215     f->SetParent(this);
1216     m_LastLayout = -1;
1217 }
1218
1219
1220
1221 void wxHtmlContainerCell::SetAlign(const wxHtmlTag& tag)
1222 {
1223     if (tag.HasParam(wxT("ALIGN")))
1224     {
1225         wxString alg = tag.GetParam(wxT("ALIGN"));
1226         alg.MakeUpper();
1227         if (alg == wxT("CENTER"))
1228             SetAlignHor(wxHTML_ALIGN_CENTER);
1229         else if (alg == wxT("LEFT"))
1230             SetAlignHor(wxHTML_ALIGN_LEFT);
1231         else if (alg == wxT("JUSTIFY"))
1232             SetAlignHor(wxHTML_ALIGN_JUSTIFY);
1233         else if (alg == wxT("RIGHT"))
1234             SetAlignHor(wxHTML_ALIGN_RIGHT);
1235         m_LastLayout = -1;
1236     }
1237 }
1238
1239
1240
1241 void wxHtmlContainerCell::SetWidthFloat(const wxHtmlTag& tag, double pixel_scale)
1242 {
1243     if (tag.HasParam(wxT("WIDTH")))
1244     {
1245         int wdi;
1246         wxString wd = tag.GetParam(wxT("WIDTH"));
1247
1248         if (wd[wd.length()-1] == wxT('%'))
1249         {
1250             wxSscanf(wd.c_str(), wxT("%i%%"), &wdi);
1251             SetWidthFloat(wdi, wxHTML_UNITS_PERCENT);
1252         }
1253         else
1254         {
1255             wxSscanf(wd.c_str(), wxT("%i"), &wdi);
1256             SetWidthFloat((int)(pixel_scale * (double)wdi), wxHTML_UNITS_PIXELS);
1257         }
1258         m_LastLayout = -1;
1259     }
1260 }
1261
1262
1263
1264 const wxHtmlCell* wxHtmlContainerCell::Find(int condition, const void* param) const
1265 {
1266     if (m_Cells)
1267     {
1268         for (wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext())
1269         {
1270             const wxHtmlCell *r = cell->Find(condition, param);
1271             if (r) return r;
1272         }
1273     }
1274     return NULL;
1275 }
1276
1277
1278 wxHtmlCell *wxHtmlContainerCell::FindCellByPos(wxCoord x, wxCoord y,
1279                                                unsigned flags) const
1280 {
1281     if ( flags & wxHTML_FIND_EXACT )
1282     {
1283         for ( const wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext() )
1284         {
1285             int cx = cell->GetPosX(),
1286                 cy = cell->GetPosY();
1287
1288             if ( (cx <= x) && (cx + cell->GetWidth() > x) &&
1289                  (cy <= y) && (cy + cell->GetHeight() > y) )
1290             {
1291                 return cell->FindCellByPos(x - cx, y - cy, flags);
1292             }
1293         }
1294     }
1295     else if ( flags & wxHTML_FIND_NEAREST_AFTER )
1296     {
1297         wxHtmlCell *c;
1298         for ( const wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext() )
1299         {
1300             if ( cell->IsFormattingCell() )
1301                 continue;
1302             int cellY = cell->GetPosY();
1303             if (!( y < cellY || (y < cellY + cell->GetHeight() &&
1304                                  x < cell->GetPosX() + cell->GetWidth()) ))
1305                 continue;
1306
1307             c = cell->FindCellByPos(x - cell->GetPosX(), y - cellY, flags);
1308             if (c) return c;
1309         }
1310     }
1311     else if ( flags & wxHTML_FIND_NEAREST_BEFORE )
1312     {
1313         wxHtmlCell *c2, *c = NULL;
1314         for ( const wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext() )
1315         {
1316             if ( cell->IsFormattingCell() )
1317                 continue;
1318             int cellY = cell->GetPosY();
1319             if (!( cellY + cell->GetHeight() <= y ||
1320                    (y >= cellY && x >= cell->GetPosX()) ))
1321                 break;
1322             c2 = cell->FindCellByPos(x - cell->GetPosX(), y - cellY, flags);
1323             if (c2)
1324                 c = c2;
1325         }
1326         if (c) return c;
1327     }
1328
1329     return NULL;
1330 }
1331
1332
1333 bool wxHtmlContainerCell::ProcessMouseClick(wxHtmlWindowInterface *window,
1334                                             const wxPoint& pos,
1335                                             const wxMouseEvent& event)
1336 {
1337 #if WXWIN_COMPATIBILITY_2_6
1338     wxHtmlCellOnMouseClickCompatHelper compat(window, pos, event);
1339     return compat.CallOnMouseClick(this);
1340 }
1341
1342 void wxHtmlContainerCell::OnMouseClick(wxWindow*,
1343                                        int, int, const wxMouseEvent& event)
1344 {
1345     wxCHECK_RET( gs_helperOnMouseClick, _T("unexpected call to OnMouseClick") );
1346     wxHtmlWindowInterface *window = gs_helperOnMouseClick->window;
1347     const wxPoint& pos = gs_helperOnMouseClick->pos;
1348 #endif // WXWIN_COMPATIBILITY_2_6
1349
1350     bool retval = false;
1351     wxHtmlCell *cell = FindCellByPos(pos.x, pos.y);
1352     if ( cell )
1353         retval = cell->ProcessMouseClick(window, pos, event);
1354
1355 #if WXWIN_COMPATIBILITY_2_6
1356     gs_helperOnMouseClick->retval = retval;
1357 #else
1358     return retval;
1359 #endif // WXWIN_COMPATIBILITY_2_6
1360 }
1361
1362
1363 wxHtmlCell *wxHtmlContainerCell::GetFirstTerminal() const
1364 {
1365     if ( m_Cells )
1366     {
1367         wxHtmlCell *c2;
1368         for (wxHtmlCell *c = m_Cells; c; c = c->GetNext())
1369         {
1370             c2 = c->GetFirstTerminal();
1371             if ( c2 )
1372                 return c2;
1373         }
1374     }
1375     return NULL;
1376 }
1377
1378 wxHtmlCell *wxHtmlContainerCell::GetLastTerminal() const
1379 {
1380     if ( m_Cells )
1381     {
1382         // most common case first:
1383         wxHtmlCell *c = m_LastCell->GetLastTerminal();
1384         if ( c )
1385             return c;
1386
1387         wxHtmlCell *ctmp;
1388         wxHtmlCell *c2 = NULL;
1389         for (c = m_Cells; c; c = c->GetNext())
1390         {
1391             ctmp = c->GetLastTerminal();
1392             if ( ctmp )
1393                 c2 = ctmp;
1394         }
1395         return c2;
1396     }
1397     else
1398         return NULL;
1399 }
1400
1401
1402 static bool IsEmptyContainer(wxHtmlContainerCell *cell)
1403 {
1404     for ( wxHtmlCell *c = cell->GetFirstChild(); c; c = c->GetNext() )
1405     {
1406         if ( !c->IsTerminalCell() || !c->IsFormattingCell() )
1407             return false;
1408     }
1409     return true;
1410 }
1411
1412 void wxHtmlContainerCell::RemoveExtraSpacing(bool top, bool bottom)
1413 {
1414     if ( top )
1415         SetIndent(0, wxHTML_INDENT_TOP);
1416     if ( bottom )
1417         SetIndent(0, wxHTML_INDENT_BOTTOM);
1418
1419     if ( m_Cells )
1420     {
1421         wxHtmlCell *c;
1422         wxHtmlContainerCell *cont;
1423         if ( top )
1424         {
1425             for ( c = m_Cells; c; c = c->GetNext() )
1426             {
1427                 if ( c->IsTerminalCell() )
1428                 {
1429                     if ( !c->IsFormattingCell() )
1430                         break;
1431                 }
1432                 else
1433                 {
1434                     cont = (wxHtmlContainerCell*)c;
1435                     if ( IsEmptyContainer(cont) )
1436                     {
1437                         cont->SetIndent(0, wxHTML_INDENT_VERTICAL);
1438                     }
1439                     else
1440                     {
1441                         cont->RemoveExtraSpacing(true, false);
1442                         break;
1443                     }
1444                 }
1445             }
1446         }
1447
1448         if ( bottom )
1449         {
1450             wxArrayPtrVoid arr;
1451             for ( c = m_Cells; c; c = c->GetNext() )
1452                 arr.Add((void*)c);
1453
1454             for ( int i = arr.GetCount() - 1; i >= 0; i--)
1455             {
1456                 c = (wxHtmlCell*)arr[i];
1457                 if ( c->IsTerminalCell() )
1458                 {
1459                     if ( !c->IsFormattingCell() )
1460                         break;
1461                 }
1462                 else
1463                 {
1464                     cont = (wxHtmlContainerCell*)c;
1465                     if ( IsEmptyContainer(cont) )
1466                     {
1467                         cont->SetIndent(0, wxHTML_INDENT_VERTICAL);
1468                     }
1469                     else
1470                     {
1471                         cont->RemoveExtraSpacing(false, true);
1472                         break;
1473                     }
1474                 }
1475             }
1476         }
1477     }
1478 }
1479
1480
1481
1482
1483 // --------------------------------------------------------------------------
1484 // wxHtmlColourCell
1485 // --------------------------------------------------------------------------
1486
1487 IMPLEMENT_ABSTRACT_CLASS(wxHtmlColourCell, wxHtmlCell)
1488
1489 void wxHtmlColourCell::Draw(wxDC& dc,
1490                             int x, int y,
1491                             int WXUNUSED(view_y1), int WXUNUSED(view_y2),
1492                             wxHtmlRenderingInfo& info)
1493 {
1494     DrawInvisible(dc, x, y, info);
1495 }
1496
1497 void wxHtmlColourCell::DrawInvisible(wxDC& dc,
1498                                      int WXUNUSED(x), int WXUNUSED(y),
1499                                      wxHtmlRenderingInfo& info)
1500 {
1501     wxHtmlRenderingState& state = info.GetState();
1502     if (m_Flags & wxHTML_CLR_FOREGROUND)
1503     {
1504         state.SetFgColour(m_Colour);
1505         if (state.GetSelectionState() != wxHTML_SEL_IN)
1506             dc.SetTextForeground(m_Colour);
1507         else
1508             dc.SetTextForeground(
1509                     info.GetStyle().GetSelectedTextColour(m_Colour));
1510     }
1511     if (m_Flags & wxHTML_CLR_BACKGROUND)
1512     {
1513         state.SetBgColour(m_Colour);
1514         if (state.GetSelectionState() != wxHTML_SEL_IN)
1515         {
1516             dc.SetTextBackground(m_Colour);
1517             dc.SetBackground(wxBrush(m_Colour, wxBRUSHSTYLE_SOLID));
1518         }
1519         else
1520         {
1521             wxColour c = info.GetStyle().GetSelectedTextBgColour(m_Colour);
1522             dc.SetTextBackground(c);
1523             dc.SetBackground(wxBrush(c, wxBRUSHSTYLE_SOLID));
1524         }
1525     }
1526 }
1527
1528
1529
1530
1531 // ---------------------------------------------------------------------------
1532 // wxHtmlFontCell
1533 // ---------------------------------------------------------------------------
1534
1535 IMPLEMENT_ABSTRACT_CLASS(wxHtmlFontCell, wxHtmlCell)
1536
1537 void wxHtmlFontCell::Draw(wxDC& dc,
1538                           int WXUNUSED(x), int WXUNUSED(y),
1539                           int WXUNUSED(view_y1), int WXUNUSED(view_y2),
1540                           wxHtmlRenderingInfo& WXUNUSED(info))
1541 {
1542     dc.SetFont(m_Font);
1543 }
1544
1545 void wxHtmlFontCell::DrawInvisible(wxDC& dc, int WXUNUSED(x), int WXUNUSED(y),
1546                                    wxHtmlRenderingInfo& WXUNUSED(info))
1547 {
1548     dc.SetFont(m_Font);
1549 }
1550
1551
1552
1553
1554
1555
1556
1557
1558 // ---------------------------------------------------------------------------
1559 // wxHtmlWidgetCell
1560 // ---------------------------------------------------------------------------
1561
1562 IMPLEMENT_ABSTRACT_CLASS(wxHtmlWidgetCell, wxHtmlCell)
1563
1564 wxHtmlWidgetCell::wxHtmlWidgetCell(wxWindow *wnd, int w)
1565 {
1566     int sx, sy;
1567     m_Wnd = wnd;
1568     m_Wnd->GetSize(&sx, &sy);
1569     m_Width = sx, m_Height = sy;
1570     m_WidthFloat = w;
1571 }
1572
1573
1574 void wxHtmlWidgetCell::Draw(wxDC& WXUNUSED(dc),
1575                             int WXUNUSED(x), int WXUNUSED(y),
1576                             int WXUNUSED(view_y1), int WXUNUSED(view_y2),
1577                             wxHtmlRenderingInfo& WXUNUSED(info))
1578 {
1579     int absx = 0, absy = 0, stx, sty;
1580     wxHtmlCell *c = this;
1581
1582     while (c)
1583     {
1584         absx += c->GetPosX();
1585         absy += c->GetPosY();
1586         c = c->GetParent();
1587     }
1588
1589     wxScrolledWindow *scrolwin =
1590         wxDynamicCast(m_Wnd->GetParent(), wxScrolledWindow);
1591     wxCHECK_RET( scrolwin,
1592                  _T("widget cells can only be placed in wxHtmlWindow") );
1593
1594     scrolwin->GetViewStart(&stx, &sty);
1595     m_Wnd->SetSize(absx - wxHTML_SCROLL_STEP * stx,
1596                    absy  - wxHTML_SCROLL_STEP * sty,
1597                    m_Width, m_Height);
1598 }
1599
1600
1601
1602 void wxHtmlWidgetCell::DrawInvisible(wxDC& WXUNUSED(dc),
1603                                      int WXUNUSED(x), int WXUNUSED(y),
1604                                      wxHtmlRenderingInfo& WXUNUSED(info))
1605 {
1606     int absx = 0, absy = 0, stx, sty;
1607     wxHtmlCell *c = this;
1608
1609     while (c)
1610     {
1611         absx += c->GetPosX();
1612         absy += c->GetPosY();
1613         c = c->GetParent();
1614     }
1615
1616     ((wxScrolledWindow*)(m_Wnd->GetParent()))->GetViewStart(&stx, &sty);
1617     m_Wnd->SetSize(absx - wxHTML_SCROLL_STEP * stx, absy  - wxHTML_SCROLL_STEP * sty, m_Width, m_Height);
1618 }
1619
1620
1621
1622 void wxHtmlWidgetCell::Layout(int w)
1623 {
1624     if (m_WidthFloat != 0)
1625     {
1626         m_Width = (w * m_WidthFloat) / 100;
1627         m_Wnd->SetSize(m_Width, m_Height);
1628     }
1629
1630     wxHtmlCell::Layout(w);
1631 }
1632
1633
1634
1635 // ----------------------------------------------------------------------------
1636 // wxHtmlTerminalCellsInterator
1637 // ----------------------------------------------------------------------------
1638
1639 const wxHtmlCell* wxHtmlTerminalCellsInterator::operator++()
1640 {
1641     if ( !m_pos )
1642         return NULL;
1643
1644     do
1645     {
1646         if ( m_pos == m_to )
1647         {
1648             m_pos = NULL;
1649             return NULL;
1650         }
1651
1652         if ( m_pos->GetNext() )
1653             m_pos = m_pos->GetNext();
1654         else
1655         {
1656             // we must go up the hierarchy until we reach container where this
1657             // is not the last child, and then go down to first terminal cell:
1658             while ( m_pos->GetNext() == NULL )
1659             {
1660                 m_pos = m_pos->GetParent();
1661                 if ( !m_pos )
1662                     return NULL;
1663             }
1664             m_pos = m_pos->GetNext();
1665         }
1666         while ( m_pos->GetFirstChild() != NULL )
1667             m_pos = m_pos->GetFirstChild();
1668     } while ( !m_pos->IsTerminalCell() );
1669
1670     return m_pos;
1671 }
1672
1673 #endif