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, wxT("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, wxT("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     //     overridden GetCursor() continues to work. The trick is that the base
 205     //     wxHtmlCell::GetCursor() method simply returns wxNullCursor, so we
 206     //     know that GetCursor() was overridden iff it returns valid cursor.
 207     wxCursor cur = GetCursor();
 208     if (cur.IsOk())
 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
 224 wxHtmlCell::AdjustPagebreak(int *pagebreak,
 225                             const wxArrayInt& WXUNUSED(known_pagebreaks),
 226                             int pageHeight) const
 227 {
 228     // Notice that we always break the cells bigger than the page height here
 229     // as otherwise we wouldn't be able to break them at all.
 230     if ( m_Height <= pageHeight &&
 231             (!m_CanLiveOnPagebreak &&
 232                 m_PosY < *pagebreak && m_PosY + m_Height > *pagebreak) )
 233     {
 234         *pagebreak = m_PosY;
 235         return true;
 236     }
 237
 238     return false;
 239 }
 240
 241
 242
 243 void wxHtmlCell::SetLink(const wxHtmlLinkInfo& link)
 244 {
 245     wxDELETE(m_Link);
 246     if (link.GetHref() != wxEmptyString)
 247         m_Link = new wxHtmlLinkInfo(link);
 248 }
 249
 250
 251 void wxHtmlCell::Layout(int WXUNUSED(w))
 252 {
 253     SetPos(0, 0);
 254 }
 255
 256
 257
 258 const wxHtmlCell* wxHtmlCell::Find(int WXUNUSED(condition), const void* WXUNUSED(param)) const
 259 {
 260     return NULL;
 261 }
 262
 263
 264 wxHtmlCell *wxHtmlCell::FindCellByPos(wxCoord x, wxCoord y,
 265                                       unsigned flags) const
 266 {
 267     if ( x >= 0 && x < m_Width && y >= 0 && y < m_Height )
 268     {
 269         return wxConstCast(this, wxHtmlCell);
 270     }
 271     else
 272     {
 273         if ((flags & wxHTML_FIND_NEAREST_AFTER) &&
 274                 (y < 0 || (y < 0+m_Height && x < 0+m_Width)))
 275             return wxConstCast(this, wxHtmlCell);
 276         else if ((flags & wxHTML_FIND_NEAREST_BEFORE) &&
 277                 (y >= 0+m_Height || (y >= 0 && x >= 0)))
 278             return wxConstCast(this, wxHtmlCell);
 279         else
 280             return NULL;
 281     }
 282 }
 283
 284
 285 wxPoint wxHtmlCell::GetAbsPos(wxHtmlCell *rootCell) const
 286 {
 287     wxPoint p(m_PosX, m_PosY);
 288     for (wxHtmlCell *parent = m_Parent; parent && parent != rootCell;
 289          parent = parent->m_Parent)
 290     {
 291         p.x += parent->m_PosX;
 292         p.y += parent->m_PosY;
 293     }
 294     return p;
 295 }
 296
 297 wxHtmlCell *wxHtmlCell::GetRootCell() const
 298 {
 299     wxHtmlCell *c = wxConstCast(this, wxHtmlCell);
 300     while ( c->m_Parent )
 301         c = c->m_Parent;
 302     return c;
 303 }
 304
 305 unsigned wxHtmlCell::GetDepth() const
 306 {
 307     unsigned d = 0;
 308     for (wxHtmlCell *p = m_Parent; p; p = p->m_Parent)
 309         d++;
 310     return d;
 311 }
 312
 313 bool wxHtmlCell::IsBefore(wxHtmlCell *cell) const
 314 {
 315     const wxHtmlCell *c1 = this;
 316     const wxHtmlCell *c2 = cell;
 317     unsigned d1 = GetDepth();
 318     unsigned d2 = cell->GetDepth();
 319
 320     if ( d1 > d2 )
 321         for (; d1 != d2; d1-- )
 322             c1 = c1->m_Parent;
 323     else if ( d1 < d2 )
 324         for (; d1 != d2; d2-- )
 325             c2 = c2->m_Parent;
 326
 327     if ( cell == this )
 328         return true;
 329
 330     while ( c1 && c2 )
 331     {
 332         if ( c1->m_Parent == c2->m_Parent )
 333         {
 334             while ( c1 )
 335             {
 336                 if ( c1 == c2 )
 337                     return true;
 338                 c1 = c1->GetNext();
 339             }
 340             return false;
 341         }
 342         else
 343         {
 344             c1 = c1->m_Parent;
 345             c2 = c2->m_Parent;
 346         }
 347     }
 348
 349     wxFAIL_MSG(wxT("Cells are in different trees"));
 350     return false;
 351 }
 352
 353
 354 //-----------------------------------------------------------------------------
 355 // wxHtmlWordCell
 356 //-----------------------------------------------------------------------------
 357
 358 IMPLEMENT_ABSTRACT_CLASS(wxHtmlWordCell, wxHtmlCell)
 359
 360 wxHtmlWordCell::wxHtmlWordCell(const wxString& word, const wxDC& dc) : wxHtmlCell()
 361 {
 362     m_Word = word;
 363     wxCoord w, h, d;
 364     dc.GetTextExtent(m_Word, &w, &h, &d);
 365     m_Width = w;
 366     m_Height = h;
 367     m_Descent = d;
 368     SetCanLiveOnPagebreak(false);
 369     m_allowLinebreak = true;
 370 }
 371
 372 void wxHtmlWordCell::SetPreviousWord(wxHtmlWordCell *cell)
 373 {
 374     if ( cell && m_Parent == cell->m_Parent &&
 375          !wxIsspace(cell->m_Word.Last()) && !wxIsspace(m_Word[0u]) )
 376     {
 377         m_allowLinebreak = false;
 378     }
 379 }
 380
 381 // Splits m_Word into up to three parts according to selection, returns
 382 // substring before, in and after selection and the points (in relative coords)
 383 // where s2 and s3 start:
 384 void wxHtmlWordCell::Split(const wxDC& dc,
 385                            const wxPoint& selFrom, const wxPoint& selTo,
 386                            unsigned& pos1, unsigned& pos2) const
 387 {
 388     wxPoint pt1 = (selFrom == wxDefaultPosition) ?
 389                    wxDefaultPosition : selFrom - GetAbsPos();
 390     wxPoint pt2 = (selTo == wxDefaultPosition) ?
 391                    wxPoint(m_Width, wxDefaultCoord) : selTo - GetAbsPos();
 392
 393     // if the selection is entirely within this cell, make sure pt1 < pt2 in
 394     // order to make the rest of this function simpler:
 395     if ( selFrom != wxDefaultPosition && selTo != wxDefaultPosition &&
 396          selFrom.x > selTo.x )
 397     {
 398         wxPoint tmp = pt1;
 399         pt1 = pt2;
 400         pt2 = tmp;
 401     }
 402
 403     unsigned len = m_Word.length();
 404     unsigned i = 0;
 405     pos1 = 0;
 406
 407     // adjust for cases when the start/end position is completely
 408     // outside the cell:
 409     if ( pt1.y < 0 )
 410         pt1.x = 0;
 411     if ( pt2.y >= m_Height )
 412         pt2.x = m_Width;
 413
 414     // before selection:
 415     // (include character under caret only if in first half of width)
 416 #ifdef __WXMAC__
 417     // implementation using PartialExtents to support fractional widths
 418     wxArrayInt widths ;
 419     dc.GetPartialTextExtents(m_Word,widths) ;
 420     while( i < len && pt1.x >= widths[i] )
 421         i++ ;
 422     if ( i < len )
 423     {
 424         int charW = (i > 0) ? widths[i] - widths[i-1] : widths[i];
 425         if ( widths[i] - pt1.x < charW/2 )
 426             i++;
 427     }
 428 #else // !__WXMAC__
 429     wxCoord charW, charH;
 430     while ( pt1.x > 0 && i < len )
 431     {
 432         dc.GetTextExtent(m_Word[i], &charW, &charH);
 433         pt1.x -= charW;
 434         if ( pt1.x >= -charW/2 )
 435         {
 436             pos1 += charW;
 437             i++;
 438         }
 439     }
 440 #endif // __WXMAC__/!__WXMAC__
 441
 442     // in selection:
 443     // (include character under caret only if in first half of width)
 444     unsigned j = i;
 445 #ifdef __WXMAC__
 446     while( j < len && pt2.x >= widths[j] )
 447         j++ ;
 448     if ( j < len )
 449     {
 450         int charW = (j > 0) ? widths[j] - widths[j-1] : widths[j];
 451         if ( widths[j] - pt2.x < charW/2 )
 452             j++;
 453     }
 454 #else // !__WXMAC__
 455     pos2 = pos1;
 456     pt2.x -= pos2;
 457     while ( pt2.x > 0 && j < len )
 458     {
 459         dc.GetTextExtent(m_Word[j], &charW, &charH);
 460         pt2.x -= charW;
 461         if ( pt2.x >= -charW/2 )
 462         {
 463             pos2 += charW;
 464             j++;
 465         }
 466     }
 467 #endif // __WXMAC__/!__WXMAC__
 468
 469     pos1 = i;
 470     pos2 = j;
 471
 472     wxASSERT( pos2 >= pos1 );
 473 }
 474
 475 void wxHtmlWordCell::SetSelectionPrivPos(const wxDC& dc, wxHtmlSelection *s) const
 476 {
 477     unsigned p1, p2;
 478
 479     Split(dc,
 480           this == s->GetFromCell() ? s->GetFromPos() : wxDefaultPosition,
 481           this == s->GetToCell() ? s->GetToPos() : wxDefaultPosition,
 482           p1, p2);
 483
 484     if ( this == s->GetFromCell() )
 485         s->SetFromCharacterPos (p1); // selection starts here
 486     if ( this == s->GetToCell() )
 487         s->SetToCharacterPos (p2); // selection ends here
 488 }
 489
 490
 491 static void SwitchSelState(wxDC& dc, wxHtmlRenderingInfo& info,
 492                            bool toSelection)
 493 {
 494     wxColour fg = info.GetState().GetFgColour();
 495     wxColour bg = info.GetState().GetBgColour();
 496
 497     if ( toSelection )
 498     {
 499         dc.SetBackgroundMode(wxBRUSHSTYLE_SOLID);
 500         dc.SetTextForeground(info.GetStyle().GetSelectedTextColour(fg));
 501         dc.SetTextBackground(info.GetStyle().GetSelectedTextBgColour(bg));
 502         dc.SetBackground(wxBrush(info.GetStyle().GetSelectedTextBgColour(bg),
 503                                  wxBRUSHSTYLE_SOLID));
 504     }
 505     else
 506     {
 507         dc.SetBackgroundMode(wxBRUSHSTYLE_TRANSPARENT);
 508         dc.SetTextForeground(fg);
 509         dc.SetTextBackground(bg);
 510         dc.SetBackground(wxBrush(bg, wxBRUSHSTYLE_SOLID));
 511     }
 512 }
 513
 514
 515 void wxHtmlWordCell::Draw(wxDC& dc, int x, int y,
 516                           int WXUNUSED(view_y1), int WXUNUSED(view_y2),
 517                           wxHtmlRenderingInfo& info)
 518 {
 519 #if 0 // useful for debugging
 520     dc.SetPen(*wxBLACK_PEN);
 521     dc.DrawRectangle(x+m_PosX,y+m_PosY,m_Width /* VZ: +1? */ ,m_Height);
 522 #endif
 523
 524     bool drawSelectionAfterCell = false;
 525
 526     if ( info.GetState().GetSelectionState() == wxHTML_SEL_CHANGING )
 527     {
 528         // Selection changing, we must draw the word piecewise:
 529         wxHtmlSelection *s = info.GetSelection();
 530         wxString txt;
 531         int w, h;
 532         int ofs = 0;
 533
 534         // NB: this is quite a hack: in order to compute selection boundaries
 535         //     (in word's characters) we must know current font, which is only
 536         //     possible inside rendering code. Therefore we update the
 537         //     information here and store it in wxHtmlSelection so that
 538         //     ConvertToText can use it later:
 539         if ( !s->AreFromToCharacterPosSet () )
 540         {
 541             SetSelectionPrivPos(dc, s);
 542         }
 543
 544         int part1 = s->GetFromCell()==this ? s->GetFromCharacterPos() : 0;
 545         int part2 = s->GetToCell()==this   ? s->GetToCharacterPos()   : m_Word.Length();
 546
 547         if ( part1 > 0 )
 548         {
 549             txt = m_Word.Mid(0, part1);
 550             dc.DrawText(txt, x + m_PosX, y + m_PosY);
 551             dc.GetTextExtent(txt, &w, &h);
 552             ofs += w;
 553         }
 554
 555         SwitchSelState(dc, info, true);
 556
 557         txt = m_Word.Mid(part1, part2-part1);
 558         dc.DrawText(txt, ofs + x + m_PosX, y + m_PosY);
 559
 560         if ( (size_t)part2 < m_Word.length() )
 561         {
 562             dc.GetTextExtent(txt, &w, &h);
 563             ofs += w;
 564             SwitchSelState(dc, info, false);
 565             txt = m_Word.Mid(part2);
 566             dc.DrawText(txt, ofs + x + m_PosX, y + m_PosY);
 567         }
 568         else
 569             drawSelectionAfterCell = true;
 570     }
 571     else
 572     {
 573         wxHtmlSelectionState selstate = info.GetState().GetSelectionState();
 574         // Not changing selection state, draw the word in single mode:
 575         if ( selstate != wxHTML_SEL_OUT &&
 576              dc.GetBackgroundMode() != wxBRUSHSTYLE_SOLID )
 577         {
 578             SwitchSelState(dc, info, true);
 579         }
 580         else if ( selstate == wxHTML_SEL_OUT &&
 581                   dc.GetBackgroundMode() == wxBRUSHSTYLE_SOLID )
 582         {
 583             SwitchSelState(dc, info, false);
 584         }
 585         dc.DrawText(m_Word, x + m_PosX, y + m_PosY);
 586         drawSelectionAfterCell = (selstate != wxHTML_SEL_OUT);
 587     }
 588
 589     // NB: If the text is justified then there is usually some free space
 590     //     between adjacent cells and drawing the selection only onto cells
 591     //     would result in ugly unselected spaces. The code below detects
 592     //     this special case and renders the selection *outside* the sell,
 593     //     too.
 594     if ( m_Parent->GetAlignHor() == wxHTML_ALIGN_JUSTIFY &&
 595          drawSelectionAfterCell )
 596     {
 597         wxHtmlCell *nextCell = m_Next;
 598         while ( nextCell && nextCell->IsFormattingCell() )
 599             nextCell = nextCell->GetNext();
 600         if ( nextCell )
 601         {
 602             int nextX = nextCell->GetPosX();
 603             if ( m_PosX + m_Width < nextX )
 604             {
 605                 dc.SetBrush(dc.GetBackground());
 606                 dc.SetPen(*wxTRANSPARENT_PEN);
 607                 dc.DrawRectangle(x + m_PosX + m_Width, y + m_PosY,
 608                                  nextX - m_PosX - m_Width, m_Height);
 609             }
 610         }
 611     }
 612 }
 613
 614 wxCursor wxHtmlWordCell::GetMouseCursor(wxHtmlWindowInterface *window) const
 615 {
 616     if ( !GetLink() )
 617     {
 618         return window->GetHTMLCursor(wxHtmlWindowInterface::HTMLCursor_Text);
 619     }
 620     else
 621     {
 622         return wxHtmlCell::GetMouseCursor(window);
 623     }
 624 }
 625
 626 wxString wxHtmlWordCell::ConvertToText(wxHtmlSelection *s) const
 627 {
 628     if ( s && (this == s->GetFromCell() || this == s->GetToCell()) )
 629     {
 630         // VZ: we may be called before we had a chance to re-render ourselves
 631         //     and in this case GetFrom/ToPrivPos() is not set yet -- assume
 632         //     that this only happens in case of a double/triple click (which
 633         //     seems to be the case now) and so it makes sense to select the
 634         //     entire contents of the cell in this case
 635         //
 636         // TODO: but this really needs to be fixed in some better way later...
 637         if ( s->AreFromToCharacterPosSet() )
 638         {
 639             const int part1 = s->GetFromCell()==this ? s->GetFromCharacterPos() : 0;
 640             const int part2 = s->GetToCell()==this   ? s->GetToCharacterPos()   : m_Word.Length();
 641             if ( part1 == part2 )
 642                 return wxEmptyString;
 643             return GetPartAsText(part1, part2);
 644         }
 645         //else: return the whole word below
 646     }
 647
 648     return GetAllAsText();
 649 }
 650
 651 wxString wxHtmlWordWithTabsCell::GetAllAsText() const
 652 {
 653     return m_wordOrig;
 654 }
 655
 656 wxString wxHtmlWordWithTabsCell::GetPartAsText(int begin, int end) const
 657 {
 658     // NB: The 'begin' and 'end' positions are in the _displayed_ text
 659     //     (stored in m_Word) and not in the text with tabs that should
 660     //     be copied to clipboard (m_wordOrig).
 661     //
 662     // NB: Because selection is performed on displayed text, it's possible
 663     //     to select e.g. "half of TAB character" -- IOW, 'begin' and 'end'
 664     //     may be in the middle of TAB character expansion into ' 's. In this
 665     //     case, we copy the TAB character to clipboard once.
 666
 667     wxASSERT( begin < end );
 668
 669     const unsigned SPACES_PER_TAB = 8;
 670
 671     wxString sel;
 672
 673     int pos = 0;
 674     wxString::const_iterator i = m_wordOrig.begin();
 675
 676     // find the beginning of text to copy:
 677     for ( ; pos < begin; ++i )
 678     {
 679         if ( *i == '\t' )
 680         {
 681             pos += 8 - (m_linepos + pos) % SPACES_PER_TAB;
 682             if ( pos >= begin )
 683             {
 684                 sel += '\t';
 685             }
 686         }
 687         else
 688         {
 689             ++pos;
 690         }
 691     }
 692
 693     // copy the content until we reach 'end':
 694     for ( ; pos < end; ++i )
 695     {
 696         const wxChar c = *i;
 697         sel += c;
 698
 699         if ( c == '\t' )
 700             pos += 8 - (m_linepos + pos) % SPACES_PER_TAB;
 701         else
 702             ++pos;
 703     }
 704
 705     return sel;
 706 }
 707
 708
 709
 710 //-----------------------------------------------------------------------------
 711 // wxHtmlContainerCell
 712 //-----------------------------------------------------------------------------
 713
 714 IMPLEMENT_ABSTRACT_CLASS(wxHtmlContainerCell, wxHtmlCell)
 715
 716 wxHtmlContainerCell::wxHtmlContainerCell(wxHtmlContainerCell *parent) : wxHtmlCell()
 717 {
 718     m_Cells = m_LastCell = NULL;
 719     m_Parent = parent;
 720     m_MaxTotalWidth = 0;
 721     if (m_Parent) m_Parent->InsertCell(this);
 722     m_AlignHor = wxHTML_ALIGN_LEFT;
 723     m_AlignVer = wxHTML_ALIGN_BOTTOM;
 724     m_IndentLeft = m_IndentRight = m_IndentTop = m_IndentBottom = 0;
 725     m_WidthFloat = 100; m_WidthFloatUnits = wxHTML_UNITS_PERCENT;
 726     m_UseBkColour = false;
 727     m_Border = 0;
 728     m_MinHeight = 0;
 729     m_MinHeightAlign = wxHTML_ALIGN_TOP;
 730     m_LastLayout = -1;
 731 }
 732
 733 wxHtmlContainerCell::~wxHtmlContainerCell()
 734 {
 735     wxHtmlCell *cell = m_Cells;
 736     while ( cell )
 737     {
 738         wxHtmlCell *cellNext = cell->GetNext();
 739         delete cell;
 740         cell = cellNext;
 741     }
 742 }
 743
 744
 745
 746 void wxHtmlContainerCell::SetIndent(int i, int what, int units)
 747 {
 748     int val = (units == wxHTML_UNITS_PIXELS) ? i : -i;
 749     if (what & wxHTML_INDENT_LEFT) m_IndentLeft = val;
 750     if (what & wxHTML_INDENT_RIGHT) m_IndentRight = val;
 751     if (what & wxHTML_INDENT_TOP) m_IndentTop = val;
 752     if (what & wxHTML_INDENT_BOTTOM) m_IndentBottom = val;
 753     m_LastLayout = -1;
 754 }
 755
 756
 757
 758 int wxHtmlContainerCell::GetIndent(int ind) const
 759 {
 760     if (ind & wxHTML_INDENT_LEFT) return m_IndentLeft;
 761     else if (ind & wxHTML_INDENT_RIGHT) return m_IndentRight;
 762     else if (ind & wxHTML_INDENT_TOP) return m_IndentTop;
 763     else if (ind & wxHTML_INDENT_BOTTOM) return m_IndentBottom;
 764     else return -1; /* BUG! Should not be called... */
 765 }
 766
 767
 768
 769
 770 int wxHtmlContainerCell::GetIndentUnits(int ind) const
 771 {
 772     bool p = false;
 773     if (ind & wxHTML_INDENT_LEFT) p = m_IndentLeft < 0;
 774     else if (ind & wxHTML_INDENT_RIGHT) p = m_IndentRight < 0;
 775     else if (ind & wxHTML_INDENT_TOP) p = m_IndentTop < 0;
 776     else if (ind & wxHTML_INDENT_BOTTOM) p = m_IndentBottom < 0;
 777     if (p) return wxHTML_UNITS_PERCENT;
 778     else return wxHTML_UNITS_PIXELS;
 779 }
 780
 781
 782 bool
 783 wxHtmlContainerCell::AdjustPagebreak(int *pagebreak,
 784                                      const wxArrayInt& known_pagebreaks,
 785                                      int pageHeight) const
 786 {
 787     if (!m_CanLiveOnPagebreak)
 788         return wxHtmlCell::AdjustPagebreak(pagebreak, known_pagebreaks, pageHeight);
 789
 790     wxHtmlCell *c = GetFirstChild();
 791     bool rt = false;
 792     int pbrk = *pagebreak - m_PosY;
 793
 794     while (c)
 795     {
 796         if (c->AdjustPagebreak(&pbrk, known_pagebreaks, pageHeight))
 797             rt = true;
 798         c = c->GetNext();
 799     }
 800     if (rt)
 801         *pagebreak = pbrk + m_PosY;
 802     return rt;
 803 }
 804
 805
 806 void wxHtmlContainerCell::Layout(int w)
 807 {
 808     wxHtmlCell::Layout(w);
 809
 810     if (m_LastLayout == w)
 811         return;
 812     m_LastLayout = w;
 813
 814     // VS: Any attempt to layout with negative or zero width leads to hell,
 815     // but we can't ignore such attempts completely, since it sometimes
 816     // happen (e.g. when trying how small a table can be). The best thing we
 817     // can do is to set the width of child cells to zero
 818     if (w < 1)
 819     {
 820        m_Width = 0;
 821        for (wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext())
 822             cell->Layout(0);
 823             // this does two things: it recursively calls this code on all
 824             // child contrainers and resets children's position to (0,0)
 825        return;
 826     }
 827
 828     wxHtmlCell *nextCell;
 829     long xpos = 0, ypos = m_IndentTop;
 830     int xdelta = 0, ybasicpos = 0, ydiff;
 831     int s_width, nextWordWidth, s_indent;
 832     int ysizeup = 0, ysizedown = 0;
 833     int MaxLineWidth = 0;
 834     int curLineWidth = 0;
 835     m_MaxTotalWidth = 0;
 836
 837
 838     /*
 839
 840     WIDTH ADJUSTING :
 841
 842     */
 843
 844     if (m_WidthFloatUnits == wxHTML_UNITS_PERCENT)
 845     {
 846         if (m_WidthFloat < 0) m_Width = (100 + m_WidthFloat) * w / 100;
 847         else m_Width = m_WidthFloat * w / 100;
 848     }
 849     else
 850     {
 851         if (m_WidthFloat < 0) m_Width = w + m_WidthFloat;
 852         else m_Width = m_WidthFloat;
 853     }
 854
 855     if (m_Cells)
 856     {
 857         int l = (m_IndentLeft < 0) ? (-m_IndentLeft * m_Width / 100) : m_IndentLeft;
 858         int r = (m_IndentRight < 0) ? (-m_IndentRight * m_Width / 100) : m_IndentRight;
 859         for (wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext())
 860             cell->Layout(m_Width - (l + r));
 861     }
 862
 863     /*
 864
 865     LAYOUT :
 866
 867     */
 868
 869     // adjust indentation:
 870     s_indent = (m_IndentLeft < 0) ? (-m_IndentLeft * m_Width / 100) : m_IndentLeft;
 871     s_width = m_Width - s_indent - ((m_IndentRight < 0) ? (-m_IndentRight * m_Width / 100) : m_IndentRight);
 872
 873     // my own layout:
 874     wxHtmlCell *cell = m_Cells,
 875                *line = m_Cells;
 876     while (cell != NULL)
 877     {
 878         switch (m_AlignVer)
 879         {
 880             case wxHTML_ALIGN_TOP :      ybasicpos = 0; break;
 881             case wxHTML_ALIGN_BOTTOM :   ybasicpos = - cell->GetHeight(); break;
 882             case wxHTML_ALIGN_CENTER :   ybasicpos = - cell->GetHeight() / 2; break;
 883         }
 884         ydiff = cell->GetHeight() + ybasicpos;
 885
 886         if (cell->GetDescent() + ydiff > ysizedown) ysizedown = cell->GetDescent() + ydiff;
 887         if (ybasicpos + cell->GetDescent() < -ysizeup) ysizeup = - (ybasicpos + cell->GetDescent());
 888
 889         // layout nonbreakable run of cells:
 890         cell->SetPos(xpos, ybasicpos + cell->GetDescent());
 891         xpos += cell->GetWidth();
 892         if (!cell->IsTerminalCell())
 893         {
 894             // Container cell indicates new line
 895             if (curLineWidth > m_MaxTotalWidth)
 896                 m_MaxTotalWidth = curLineWidth;
 897
 898             if (wxMax(cell->GetWidth(), cell->GetMaxTotalWidth()) > m_MaxTotalWidth)
 899                 m_MaxTotalWidth = cell->GetMaxTotalWidth();
 900             curLineWidth = 0;
 901         }
 902         else
 903             // Normal cell, add maximum cell width to line width
 904             curLineWidth += cell->GetMaxTotalWidth();
 905
 906         cell = cell->GetNext();
 907
 908         // compute length of the next word that would be added:
 909         nextWordWidth = 0;
 910         if (cell)
 911         {
 912             nextCell = cell;
 913             do
 914             {
 915                 nextWordWidth += nextCell->GetWidth();
 916                 nextCell = nextCell->GetNext();
 917             } while (nextCell && !nextCell->IsLinebreakAllowed());
 918         }
 919
 920         // force new line if occurred:
 921         if ((cell == NULL) ||
 922             (xpos + nextWordWidth > s_width && cell->IsLinebreakAllowed()))
 923         {
 924             if (xpos > MaxLineWidth) MaxLineWidth = xpos;
 925             if (ysizeup < 0) ysizeup = 0;
 926             if (ysizedown < 0) ysizedown = 0;
 927             switch (m_AlignHor) {
 928                 case wxHTML_ALIGN_LEFT :
 929                 case wxHTML_ALIGN_JUSTIFY :
 930                          xdelta = 0;
 931                          break;
 932                 case wxHTML_ALIGN_RIGHT :
 933                          xdelta = 0 + (s_width - xpos);
 934                          break;
 935                 case wxHTML_ALIGN_CENTER :
 936                          xdelta = 0 + (s_width - xpos) / 2;
 937                          break;
 938             }
 939             if (xdelta < 0) xdelta = 0;
 940             xdelta += s_indent;
 941
 942             ypos += ysizeup;
 943
 944             if (m_AlignHor != wxHTML_ALIGN_JUSTIFY || cell == NULL)
 945             {
 946                 while (line != cell)
 947                 {
 948                     line->SetPos(line->GetPosX() + xdelta,
 949                                    ypos + line->GetPosY());
 950                     line = line->GetNext();
 951                 }
 952             }
 953             else // align == justify
 954             {
 955                 // we have to distribute the extra horz space between the cells
 956                 // on this line
 957
 958                 // an added complication is that some cells have fixed size and
 959                 // shouldn't get any increment (it so happens that these cells
 960                 // also don't allow line break on them which provides with an
 961                 // easy way to test for this) -- and neither should the cells
 962                 // adjacent to them as this could result in a visible space
 963                 // between two cells separated by, e.g. font change, cell which
 964                 // is wrong
 965
 966                 int step = s_width - xpos;
 967                 if ( step > 0 )
 968                 {
 969                     // first count the cells which will get extra space
 970                     int total = -1;
 971
 972                     const wxHtmlCell *c;
 973                     if ( line != cell )
 974                     {
 975                         for ( c = line; c != cell; c = c->GetNext() )
 976                         {
 977                             if ( c->IsLinebreakAllowed() )
 978                             {
 979                                 total++;
 980                             }
 981                         }
 982                     }
 983
 984                     // and now extra space to those cells which merit it
 985                     if ( total )
 986                     {
 987                         // first visible cell on line is not moved:
 988                         while (line !=cell && !line->IsLinebreakAllowed())
 989                         {
 990                             line->SetPos(line->GetPosX() + s_indent,
 991                                          line->GetPosY() + ypos);
 992                             line = line->GetNext();
 993                         }
 994
 995                         if (line != cell)
 996                         {
 997                             line->SetPos(line->GetPosX() + s_indent,
 998                                          line->GetPosY() + ypos);
 999
1000                             line = line->GetNext();
1001                         }
1002
1003                         for ( int n = 0; line != cell; line = line->GetNext() )
1004                         {
1005                             if ( line->IsLinebreakAllowed() )
1006                             {
1007                                 // offset the next cell relative to this one
1008                                 // thus increasing our size
1009                                 n++;
1010                             }
1011
1012                             line->SetPos(line->GetPosX() + s_indent +
1013                                            ((n * step) / total),
1014                                            line->GetPosY() + ypos);
1015                         }
1016                     }
1017                     else
1018                     {
1019                         // this will cause the code to enter "else branch" below:
1020                         step = 0;
1021                     }
1022                 }
1023                 // else branch:
1024                 if ( step <= 0 ) // no extra space to distribute
1025                 {
1026                     // just set the indent properly
1027                     while (line != cell)
1028                     {
1029                         line->SetPos(line->GetPosX() + s_indent,
1030                                      line->GetPosY() + ypos);
1031                         line = line->GetNext();
1032                     }
1033                 }
1034             }
1035
1036             ypos += ysizedown;
1037             xpos = 0;
1038             ysizeup = ysizedown = 0;
1039             line = cell;
1040         }
1041     }
1042
1043     // setup height & width, depending on container layout:
1044     m_Height = ypos + (ysizedown + ysizeup) + m_IndentBottom;
1045
1046     if (m_Height < m_MinHeight)
1047     {
1048         if (m_MinHeightAlign != wxHTML_ALIGN_TOP)
1049         {
1050             int diff = m_MinHeight - m_Height;
1051             if (m_MinHeightAlign == wxHTML_ALIGN_CENTER) diff /= 2;
1052             cell = m_Cells;
1053             while (cell)
1054             {
1055                 cell->SetPos(cell->GetPosX(), cell->GetPosY() + diff);
1056                 cell = cell->GetNext();
1057             }
1058         }
1059         m_Height = m_MinHeight;
1060     }
1061
1062     if (curLineWidth > m_MaxTotalWidth)
1063         m_MaxTotalWidth = curLineWidth;
1064
1065     m_MaxTotalWidth += s_indent + ((m_IndentRight < 0) ? (-m_IndentRight * m_Width / 100) : m_IndentRight);
1066     MaxLineWidth += s_indent + ((m_IndentRight < 0) ? (-m_IndentRight * m_Width / 100) : m_IndentRight);
1067     if (m_Width < MaxLineWidth) m_Width = MaxLineWidth;
1068 }
1069
1070 void wxHtmlContainerCell::UpdateRenderingStatePre(wxHtmlRenderingInfo& info,
1071                                                   wxHtmlCell *cell) const
1072 {
1073     wxHtmlSelection *s = info.GetSelection();
1074     if (!s) return;
1075     if (s->GetFromCell() == cell || s->GetToCell() == cell)
1076     {
1077         info.GetState().SetSelectionState(wxHTML_SEL_CHANGING);
1078     }
1079 }
1080
1081 void wxHtmlContainerCell::UpdateRenderingStatePost(wxHtmlRenderingInfo& info,
1082                                                    wxHtmlCell *cell) const
1083 {
1084     wxHtmlSelection *s = info.GetSelection();
1085     if (!s) return;
1086     if (s->GetToCell() == cell)
1087         info.GetState().SetSelectionState(wxHTML_SEL_OUT);
1088     else if (s->GetFromCell() == cell)
1089         info.GetState().SetSelectionState(wxHTML_SEL_IN);
1090 }
1091
1092 #define mMin(a, b) (((a) < (b)) ? (a) : (b))
1093 #define mMax(a, b) (((a) < (b)) ? (b) : (a))
1094
1095 void wxHtmlContainerCell::Draw(wxDC& dc, int x, int y, int view_y1, int view_y2,
1096                                wxHtmlRenderingInfo& info)
1097 {
1098 #if 0 // useful for debugging
1099     dc.SetPen(*wxRED_PEN);
1100     dc.DrawRectangle(x+m_PosX,y+m_PosY,m_Width,m_Height);
1101 #endif
1102
1103     int xlocal = x + m_PosX;
1104     int ylocal = y + m_PosY;
1105
1106     if (m_UseBkColour)
1107     {
1108         wxBrush myb = wxBrush(m_BkColour, wxBRUSHSTYLE_SOLID);
1109
1110         int real_y1 = mMax(ylocal, view_y1);
1111         int real_y2 = mMin(ylocal + m_Height - 1, view_y2);
1112
1113         dc.SetBrush(myb);
1114         dc.SetPen(*wxTRANSPARENT_PEN);
1115         dc.DrawRectangle(xlocal, real_y1, m_Width, real_y2 - real_y1 + 1);
1116     }
1117
1118     if (m_Border == 1)
1119     {
1120         // draw thin border using lines
1121         wxPen mypen1(m_BorderColour1, 1, wxPENSTYLE_SOLID);
1122         wxPen mypen2(m_BorderColour2, 1, wxPENSTYLE_SOLID);
1123
1124         dc.SetPen(mypen1);
1125         dc.DrawLine(xlocal, ylocal, xlocal, ylocal + m_Height - 1);
1126         dc.DrawLine(xlocal, ylocal, xlocal + m_Width, ylocal);
1127         dc.SetPen(mypen2);
1128         dc.DrawLine(xlocal + m_Width - 1, ylocal, xlocal +  m_Width - 1, ylocal + m_Height - 1);
1129         dc.DrawLine(xlocal, ylocal + m_Height - 1, xlocal + m_Width, ylocal + m_Height - 1);
1130     }
1131     else if (m_Border> 0)
1132     {
1133         wxBrush mybrush1(m_BorderColour1, wxBRUSHSTYLE_SOLID);
1134         wxBrush mybrush2(m_BorderColour2, wxBRUSHSTYLE_SOLID);
1135
1136         // draw upper left corner
1137         // 0---------------5
1138         // |              /
1139         // | 3-----------4
1140         // | |
1141         // | 2
1142         // |/
1143         // 1
1144
1145         wxPoint poly[6];
1146         poly[0].x =m_PosX; poly[0].y = m_PosY ;
1147         poly[1].x =m_PosX; poly[1].y = m_PosY + m_Height;
1148         poly[2].x =m_PosX + m_Border; poly[2].y = poly[1].y - m_Border;
1149         poly[3].x =poly[2].x ; poly[3].y = m_PosY + m_Border;
1150         poly[4].x =m_PosX + m_Width - m_Border; poly[4].y = poly[3].y;
1151         poly[5].x =m_PosX + m_Width; poly[5].y = m_PosY;
1152
1153         dc.SetBrush(mybrush1);
1154         dc.SetPen(*wxTRANSPARENT_PEN);
1155         dc.DrawPolygon(6, poly, x, y);
1156
1157         // draw lower right corner reusing point 1,2,4 and 5
1158         //                 5
1159         //                /|
1160         //               4 |
1161         //               | |
1162         //   2-----------3 |
1163         //  /              |
1164         // 1---------------0
1165         dc.SetBrush(mybrush2);
1166         poly[0].x = poly[5].x; poly[0].y = poly[1].y;
1167         poly[3].x = poly[4].x; poly[3].y = poly[2].y;
1168         dc.DrawPolygon(6, poly, x, y);
1169
1170         // smooth color transition like firefox
1171         wxColour borderMediumColour(
1172             (m_BorderColour1.Red() + m_BorderColour2.Red()) /2 ,
1173             (m_BorderColour1.Green() + m_BorderColour2.Green()) /2 ,
1174             (m_BorderColour1.Blue() + m_BorderColour2.Blue()) /2
1175             );
1176         wxPen mypen3(borderMediumColour, 1, wxPENSTYLE_SOLID);
1177         dc.SetPen(mypen3);
1178         dc.DrawLines(2, &poly[1], x, y - 1); // between 1 and 2
1179         dc.DrawLines(2, &poly[4], x, y - 1); // between 4 and 5
1180     }
1181     if (m_Cells)
1182     {
1183         // draw container's contents:
1184         for (wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext())
1185         {
1186
1187             // optimize drawing: don't render off-screen content:
1188             if ((ylocal + cell->GetPosY() <= view_y2) &&
1189                 (ylocal + cell->GetPosY() + cell->GetHeight() > view_y1))
1190             {
1191                 // the cell is visible, draw it:
1192                 UpdateRenderingStatePre(info, cell);
1193                 cell->Draw(dc,
1194                            xlocal, ylocal, view_y1, view_y2,
1195                            info);
1196                 UpdateRenderingStatePost(info, cell);
1197             }
1198             else
1199             {
1200                 // the cell is off-screen, proceed with font+color+etc.
1201                 // changes only:
1202                 cell->DrawInvisible(dc, xlocal, ylocal, info);
1203             }
1204         }
1205     }
1206 }
1207
1208
1209
1210 void wxHtmlContainerCell::DrawInvisible(wxDC& dc, int x, int y,
1211                                         wxHtmlRenderingInfo& info)
1212 {
1213     if (m_Cells)
1214     {
1215         for (wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext())
1216         {
1217             UpdateRenderingStatePre(info, cell);
1218             cell->DrawInvisible(dc, x + m_PosX, y + m_PosY, info);
1219             UpdateRenderingStatePost(info, cell);
1220         }
1221     }
1222 }
1223
1224
1225 wxColour wxHtmlContainerCell::GetBackgroundColour()
1226 {
1227     if (m_UseBkColour)
1228         return m_BkColour;
1229     else
1230         return wxNullColour;
1231 }
1232
1233
1234
1235 wxHtmlLinkInfo *wxHtmlContainerCell::GetLink(int x, int y) const
1236 {
1237     wxHtmlCell *cell = FindCellByPos(x, y);
1238
1239     // VZ: I don't know if we should pass absolute or relative coords to
1240     //     wxHtmlCell::GetLink()? As the base class version just ignores them
1241     //     anyhow, it hardly matters right now but should still be clarified
1242     return cell ? cell->GetLink(x, y) : NULL;
1243 }
1244
1245
1246
1247 void wxHtmlContainerCell::InsertCell(wxHtmlCell *f)
1248 {
1249     if (!m_Cells) m_Cells = m_LastCell = f;
1250     else
1251     {
1252         m_LastCell->SetNext(f);
1253         m_LastCell = f;
1254         if (m_LastCell) while (m_LastCell->GetNext()) m_LastCell = m_LastCell->GetNext();
1255     }
1256     f->SetParent(this);
1257     m_LastLayout = -1;
1258 }
1259
1260
1261
1262 void wxHtmlContainerCell::SetAlign(const wxHtmlTag& tag)
1263 {
1264     if (tag.HasParam(wxT("ALIGN")))
1265     {
1266         wxString alg = tag.GetParam(wxT("ALIGN"));
1267         alg.MakeUpper();
1268         if (alg == wxT("CENTER"))
1269             SetAlignHor(wxHTML_ALIGN_CENTER);
1270         else if (alg == wxT("LEFT"))
1271             SetAlignHor(wxHTML_ALIGN_LEFT);
1272         else if (alg == wxT("JUSTIFY"))
1273             SetAlignHor(wxHTML_ALIGN_JUSTIFY);
1274         else if (alg == wxT("RIGHT"))
1275             SetAlignHor(wxHTML_ALIGN_RIGHT);
1276         m_LastLayout = -1;
1277     }
1278 }
1279
1280
1281
1282 void wxHtmlContainerCell::SetWidthFloat(const wxHtmlTag& tag, double pixel_scale)
1283 {
1284     if (tag.HasParam(wxT("WIDTH")))
1285     {
1286         int wdi;
1287         wxString wd = tag.GetParam(wxT("WIDTH"));
1288
1289         if (wd[wd.length()-1] == wxT('%'))
1290         {
1291             wxSscanf(wd.c_str(), wxT("%i%%"), &wdi);
1292             SetWidthFloat(wdi, wxHTML_UNITS_PERCENT);
1293         }
1294         else
1295         {
1296             wxSscanf(wd.c_str(), wxT("%i"), &wdi);
1297             SetWidthFloat((int)(pixel_scale * (double)wdi), wxHTML_UNITS_PIXELS);
1298         }
1299         m_LastLayout = -1;
1300     }
1301 }
1302
1303
1304
1305 const wxHtmlCell* wxHtmlContainerCell::Find(int condition, const void* param) const
1306 {
1307     if (m_Cells)
1308     {
1309         for (wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext())
1310         {
1311             const wxHtmlCell *r = cell->Find(condition, param);
1312             if (r) return r;
1313         }
1314     }
1315     return NULL;
1316 }
1317
1318
1319 wxHtmlCell *wxHtmlContainerCell::FindCellByPos(wxCoord x, wxCoord y,
1320                                                unsigned flags) const
1321 {
1322     if ( flags & wxHTML_FIND_EXACT )
1323     {
1324         for ( const wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext() )
1325         {
1326             int cx = cell->GetPosX(),
1327                 cy = cell->GetPosY();
1328
1329             if ( (cx <= x) && (cx + cell->GetWidth() > x) &&
1330                  (cy <= y) && (cy + cell->GetHeight() > y) )
1331             {
1332                 return cell->FindCellByPos(x - cx, y - cy, flags);
1333             }
1334         }
1335     }
1336     else if ( flags & wxHTML_FIND_NEAREST_AFTER )
1337     {
1338         wxHtmlCell *c;
1339         for ( const wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext() )
1340         {
1341             if ( cell->IsFormattingCell() )
1342                 continue;
1343             int cellY = cell->GetPosY();
1344             if (!( y < cellY || (y < cellY + cell->GetHeight() &&
1345                                  x < cell->GetPosX() + cell->GetWidth()) ))
1346                 continue;
1347
1348             c = cell->FindCellByPos(x - cell->GetPosX(), y - cellY, flags);
1349             if (c) return c;
1350         }
1351     }
1352     else if ( flags & wxHTML_FIND_NEAREST_BEFORE )
1353     {
1354         wxHtmlCell *c2, *c = NULL;
1355         for ( const wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext() )
1356         {
1357             if ( cell->IsFormattingCell() )
1358                 continue;
1359             int cellY = cell->GetPosY();
1360             if (!( cellY + cell->GetHeight() <= y ||
1361                    (y >= cellY && x >= cell->GetPosX()) ))
1362                 break;
1363             c2 = cell->FindCellByPos(x - cell->GetPosX(), y - cellY, flags);
1364             if (c2)
1365                 c = c2;
1366         }
1367         if (c) return c;
1368     }
1369
1370     return NULL;
1371 }
1372
1373
1374 bool wxHtmlContainerCell::ProcessMouseClick(wxHtmlWindowInterface *window,
1375                                             const wxPoint& pos,
1376                                             const wxMouseEvent& event)
1377 {
1378 #if WXWIN_COMPATIBILITY_2_6
1379     wxHtmlCellOnMouseClickCompatHelper compat(window, pos, event);
1380     return compat.CallOnMouseClick(this);
1381 }
1382
1383 void wxHtmlContainerCell::OnMouseClick(wxWindow*,
1384                                        int, int, const wxMouseEvent& event)
1385 {
1386     wxCHECK_RET( gs_helperOnMouseClick, wxT("unexpected call to OnMouseClick") );
1387     wxHtmlWindowInterface *window = gs_helperOnMouseClick->window;
1388     const wxPoint& pos = gs_helperOnMouseClick->pos;
1389 #endif // WXWIN_COMPATIBILITY_2_6
1390
1391     bool retval = false;
1392     wxHtmlCell *cell = FindCellByPos(pos.x, pos.y);
1393     if ( cell )
1394         retval = cell->ProcessMouseClick(window, pos, event);
1395
1396 #if WXWIN_COMPATIBILITY_2_6
1397     gs_helperOnMouseClick->retval = retval;
1398 #else
1399     return retval;
1400 #endif // WXWIN_COMPATIBILITY_2_6
1401 }
1402
1403
1404 wxHtmlCell *wxHtmlContainerCell::GetFirstTerminal() const
1405 {
1406     if ( m_Cells )
1407     {
1408         wxHtmlCell *c2;
1409         for (wxHtmlCell *c = m_Cells; c; c = c->GetNext())
1410         {
1411             c2 = c->GetFirstTerminal();
1412             if ( c2 )
1413                 return c2;
1414         }
1415     }
1416     return NULL;
1417 }
1418
1419 wxHtmlCell *wxHtmlContainerCell::GetLastTerminal() const
1420 {
1421     if ( m_Cells )
1422     {
1423         // most common case first:
1424         wxHtmlCell *c = m_LastCell->GetLastTerminal();
1425         if ( c )
1426             return c;
1427
1428         wxHtmlCell *ctmp;
1429         wxHtmlCell *c2 = NULL;
1430         for (c = m_Cells; c; c = c->GetNext())
1431         {
1432             ctmp = c->GetLastTerminal();
1433             if ( ctmp )
1434                 c2 = ctmp;
1435         }
1436         return c2;
1437     }
1438     else
1439         return NULL;
1440 }
1441
1442
1443 static bool IsEmptyContainer(wxHtmlContainerCell *cell)
1444 {
1445     for ( wxHtmlCell *c = cell->GetFirstChild(); c; c = c->GetNext() )
1446     {
1447         if ( !c->IsTerminalCell() || !c->IsFormattingCell() )
1448             return false;
1449     }
1450     return true;
1451 }
1452
1453 void wxHtmlContainerCell::RemoveExtraSpacing(bool top, bool bottom)
1454 {
1455     if ( top )
1456         SetIndent(0, wxHTML_INDENT_TOP);
1457     if ( bottom )
1458         SetIndent(0, wxHTML_INDENT_BOTTOM);
1459
1460     if ( m_Cells )
1461     {
1462         wxHtmlCell *c;
1463         wxHtmlContainerCell *cont;
1464         if ( top )
1465         {
1466             for ( c = m_Cells; c; c = c->GetNext() )
1467             {
1468                 if ( c->IsTerminalCell() )
1469                 {
1470                     if ( !c->IsFormattingCell() )
1471                         break;
1472                 }
1473                 else
1474                 {
1475                     cont = (wxHtmlContainerCell*)c;
1476                     if ( IsEmptyContainer(cont) )
1477                     {
1478                         cont->SetIndent(0, wxHTML_INDENT_VERTICAL);
1479                     }
1480                     else
1481                     {
1482                         cont->RemoveExtraSpacing(true, false);
1483                         break;
1484                     }
1485                 }
1486             }
1487         }
1488
1489         if ( bottom )
1490         {
1491             wxArrayPtrVoid arr;
1492             for ( c = m_Cells; c; c = c->GetNext() )
1493                 arr.Add((void*)c);
1494
1495             for ( int i = arr.GetCount() - 1; i >= 0; i--)
1496             {
1497                 c = (wxHtmlCell*)arr[i];
1498                 if ( c->IsTerminalCell() )
1499                 {
1500                     if ( !c->IsFormattingCell() )
1501                         break;
1502                 }
1503                 else
1504                 {
1505                     cont = (wxHtmlContainerCell*)c;
1506                     if ( IsEmptyContainer(cont) )
1507                     {
1508                         cont->SetIndent(0, wxHTML_INDENT_VERTICAL);
1509                     }
1510                     else
1511                     {
1512                         cont->RemoveExtraSpacing(false, true);
1513                         break;
1514                     }
1515                 }
1516             }
1517         }
1518     }
1519 }
1520
1521
1522
1523
1524 // --------------------------------------------------------------------------
1525 // wxHtmlColourCell
1526 // --------------------------------------------------------------------------
1527
1528 IMPLEMENT_ABSTRACT_CLASS(wxHtmlColourCell, wxHtmlCell)
1529
1530 void wxHtmlColourCell::Draw(wxDC& dc,
1531                             int x, int y,
1532                             int WXUNUSED(view_y1), int WXUNUSED(view_y2),
1533                             wxHtmlRenderingInfo& info)
1534 {
1535     DrawInvisible(dc, x, y, info);
1536 }
1537
1538 void wxHtmlColourCell::DrawInvisible(wxDC& dc,
1539                                      int WXUNUSED(x), int WXUNUSED(y),
1540                                      wxHtmlRenderingInfo& info)
1541 {
1542     wxHtmlRenderingState& state = info.GetState();
1543     if (m_Flags & wxHTML_CLR_FOREGROUND)
1544     {
1545         state.SetFgColour(m_Colour);
1546         if (state.GetSelectionState() != wxHTML_SEL_IN)
1547             dc.SetTextForeground(m_Colour);
1548         else
1549             dc.SetTextForeground(
1550                     info.GetStyle().GetSelectedTextColour(m_Colour));
1551     }
1552     if (m_Flags & wxHTML_CLR_BACKGROUND)
1553     {
1554         state.SetBgColour(m_Colour);
1555         if (state.GetSelectionState() != wxHTML_SEL_IN)
1556         {
1557             dc.SetTextBackground(m_Colour);
1558             dc.SetBackground(wxBrush(m_Colour, wxBRUSHSTYLE_SOLID));
1559         }
1560         else
1561         {
1562             wxColour c = info.GetStyle().GetSelectedTextBgColour(m_Colour);
1563             dc.SetTextBackground(c);
1564             dc.SetBackground(wxBrush(c, wxBRUSHSTYLE_SOLID));
1565         }
1566     }
1567 }
1568
1569
1570
1571
1572 // ---------------------------------------------------------------------------
1573 // wxHtmlFontCell
1574 // ---------------------------------------------------------------------------
1575
1576 IMPLEMENT_ABSTRACT_CLASS(wxHtmlFontCell, wxHtmlCell)
1577
1578 void wxHtmlFontCell::Draw(wxDC& dc,
1579                           int WXUNUSED(x), int WXUNUSED(y),
1580                           int WXUNUSED(view_y1), int WXUNUSED(view_y2),
1581                           wxHtmlRenderingInfo& WXUNUSED(info))
1582 {
1583     dc.SetFont(m_Font);
1584 }
1585
1586 void wxHtmlFontCell::DrawInvisible(wxDC& dc, int WXUNUSED(x), int WXUNUSED(y),
1587                                    wxHtmlRenderingInfo& WXUNUSED(info))
1588 {
1589     dc.SetFont(m_Font);
1590 }
1591
1592
1593
1594
1595
1596
1597
1598
1599 // ---------------------------------------------------------------------------
1600 // wxHtmlWidgetCell
1601 // ---------------------------------------------------------------------------
1602
1603 IMPLEMENT_ABSTRACT_CLASS(wxHtmlWidgetCell, wxHtmlCell)
1604
1605 wxHtmlWidgetCell::wxHtmlWidgetCell(wxWindow *wnd, int w)
1606 {
1607     int sx, sy;
1608     m_Wnd = wnd;
1609     m_Wnd->GetSize(&sx, &sy);
1610     m_Width = sx, m_Height = sy;
1611     m_WidthFloat = w;
1612 }
1613
1614
1615 void wxHtmlWidgetCell::Draw(wxDC& WXUNUSED(dc),
1616                             int WXUNUSED(x), int WXUNUSED(y),
1617                             int WXUNUSED(view_y1), int WXUNUSED(view_y2),
1618                             wxHtmlRenderingInfo& WXUNUSED(info))
1619 {
1620     int absx = 0, absy = 0, stx, sty;
1621     wxHtmlCell *c = this;
1622
1623     while (c)
1624     {
1625         absx += c->GetPosX();
1626         absy += c->GetPosY();
1627         c = c->GetParent();
1628     }
1629
1630     wxScrolledWindow *scrolwin =
1631         wxDynamicCast(m_Wnd->GetParent(), wxScrolledWindow);
1632     wxCHECK_RET( scrolwin,
1633                  wxT("widget cells can only be placed in wxHtmlWindow") );
1634
1635     scrolwin->GetViewStart(&stx, &sty);
1636     m_Wnd->SetSize(absx - wxHTML_SCROLL_STEP * stx,
1637                    absy  - wxHTML_SCROLL_STEP * sty,
1638                    m_Width, m_Height);
1639 }
1640
1641
1642
1643 void wxHtmlWidgetCell::DrawInvisible(wxDC& WXUNUSED(dc),
1644                                      int WXUNUSED(x), int WXUNUSED(y),
1645                                      wxHtmlRenderingInfo& WXUNUSED(info))
1646 {
1647     int absx = 0, absy = 0, stx, sty;
1648     wxHtmlCell *c = this;
1649
1650     while (c)
1651     {
1652         absx += c->GetPosX();
1653         absy += c->GetPosY();
1654         c = c->GetParent();
1655     }
1656
1657     ((wxScrolledWindow*)(m_Wnd->GetParent()))->GetViewStart(&stx, &sty);
1658     m_Wnd->SetSize(absx - wxHTML_SCROLL_STEP * stx, absy  - wxHTML_SCROLL_STEP * sty, m_Width, m_Height);
1659 }
1660
1661
1662
1663 void wxHtmlWidgetCell::Layout(int w)
1664 {
1665     if (m_WidthFloat != 0)
1666     {
1667         m_Width = (w * m_WidthFloat) / 100;
1668         m_Wnd->SetSize(m_Width, m_Height);
1669     }
1670
1671     wxHtmlCell::Layout(w);
1672 }
1673
1674
1675
1676 // ----------------------------------------------------------------------------
1677 // wxHtmlTerminalCellsInterator
1678 // ----------------------------------------------------------------------------
1679
1680 const wxHtmlCell* wxHtmlTerminalCellsInterator::operator++()
1681 {
1682     if ( !m_pos )
1683         return NULL;
1684
1685     do
1686     {
1687         if ( m_pos == m_to )
1688         {
1689             m_pos = NULL;
1690             return NULL;
1691         }
1692
1693         if ( m_pos->GetNext() )
1694             m_pos = m_pos->GetNext();
1695         else
1696         {
1697             // we must go up the hierarchy until we reach container where this
1698             // is not the last child, and then go down to first terminal cell:
1699             while ( m_pos->GetNext() == NULL )
1700             {
1701                 m_pos = m_pos->GetParent();
1702                 if ( !m_pos )
1703                     return NULL;
1704             }
1705             m_pos = m_pos->GetNext();
1706         }
1707         while ( m_pos->GetFirstChild() != NULL )
1708             m_pos = m_pos->GetFirstChild();
1709     } while ( !m_pos->IsTerminalCell() );
1710
1711     return m_pos;
1712 }
1713
1714 #endif