src/html/htmlcell.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        htmlcell.cpp
   3 // Purpose:     wxHtmlCell - basic element of HTML output
   4 // Author:      Vaclav Slavik
   5 // RCS-ID:      $Id$
   6 // Copyright:   (c) 1999 Vaclav Slavik
   7 // Licence:     wxWindows Licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 #ifdef __GNUG__
  11 #pragma implementation "htmlcell.h"
  12 #endif
  13
  14 #include "wx/wxprec.h"
  15
  16 #include "wx/defs.h"
  17
  18 #if wxUSE_HTML && wxUSE_STREAMS
  19
  20 #ifdef __BORLANDC__
  21 #pragma hdrstop
  22 #endif
  23
  24 #ifndef WXPRECOMP
  25     #include "wx/brush.h"
  26     #include "wx/colour.h"
  27     #include "wx/dc.h"
  28 #endif
  29
  30 #include "wx/html/htmlcell.h"
  31 #include "wx/html/htmlwin.h"
  32 #include "wx/settings.h"
  33 #include "wx/module.h"
  34
  35 #include <stdlib.h>
  36
  37 //-----------------------------------------------------------------------------
  38 // Global variables
  39 //-----------------------------------------------------------------------------
  40
  41 static wxCursor *gs_cursorLink = NULL;
  42 static wxCursor *gs_cursorText = NULL;
  43
  44
  45 //-----------------------------------------------------------------------------
  46 // Helper classes
  47 //-----------------------------------------------------------------------------
  48
  49 void wxHtmlSelection::Set(const wxPoint& fromPos, const wxHtmlCell *fromCell,
  50                           const wxPoint& toPos, const wxHtmlCell *toCell)
  51 {
  52     m_fromCell = fromCell;
  53     m_toCell = toCell;
  54     m_fromPos = fromPos;
  55     m_toPos = toPos;
  56 }
  57
  58 void wxHtmlSelection::Set(const wxHtmlCell *fromCell, const wxHtmlCell *toCell)
  59 {
  60     wxPoint p1 = fromCell ? fromCell->GetAbsPos() : wxDefaultPosition;
  61     wxPoint p2 = toCell ? toCell->GetAbsPos() : wxDefaultPosition;
  62     if ( toCell )
  63     {
  64         p2.x += toCell->GetWidth()-1;
  65         p2.y += toCell->GetHeight()-1;
  66     }
  67     Set(p1, fromCell, p2, toCell);
  68 }
  69
  70 wxColour wxDefaultHtmlRenderingStyle::GetSelectedTextColour(
  71                                         const wxColour& clr)
  72 {
  73     return wxSystemSettings::GetColour(wxSYS_COLOUR_HIGHLIGHTTEXT);
  74 }
  75
  76 wxColour wxDefaultHtmlRenderingStyle::GetSelectedTextBgColour(
  77                                         const wxColour& WXUNUSED(clr))
  78 {
  79     return wxSystemSettings::GetColour(wxSYS_COLOUR_HIGHLIGHT);
  80 }
  81
  82
  83 //-----------------------------------------------------------------------------
  84 // wxHtmlCell
  85 //-----------------------------------------------------------------------------
  86
  87 wxHtmlCell::wxHtmlCell() : wxObject()
  88 {
  89     m_Next = NULL;
  90     m_Parent = NULL;
  91     m_Width = m_Height = m_Descent = 0;
  92     m_CanLiveOnPagebreak = TRUE;
  93     m_Link = NULL;
  94 }
  95
  96 wxHtmlCell::~wxHtmlCell()
  97 {
  98     delete m_Link;
  99 }
 100
 101
 102 void wxHtmlCell::OnMouseClick(wxWindow *parent, int x, int y,
 103                               const wxMouseEvent& event)
 104 {
 105     wxHtmlLinkInfo *lnk = GetLink(x, y);
 106     if (lnk != NULL)
 107     {
 108         wxHtmlLinkInfo lnk2(*lnk);
 109         lnk2.SetEvent(&event);
 110         lnk2.SetHtmlCell(this);
 111
 112         // note : this cast is legal because parent is *always* wxHtmlWindow
 113         wxStaticCast(parent, wxHtmlWindow)->OnLinkClicked(lnk2);
 114     }
 115 }
 116
 117
 118 wxCursor wxHtmlCell::GetCursor() const
 119 {
 120     if ( GetLink() )
 121     {
 122         if ( !gs_cursorLink )
 123             gs_cursorLink = new wxCursor(wxCURSOR_HAND);
 124         return *gs_cursorLink;
 125     }
 126     else
 127         return *wxSTANDARD_CURSOR;
 128 }
 129
 130
 131 bool wxHtmlCell::AdjustPagebreak(int *pagebreak, int* WXUNUSED(known_pagebreaks), int WXUNUSED(number_of_pages)) const
 132 {
 133     if ((!m_CanLiveOnPagebreak) &&
 134                 m_PosY < *pagebreak && m_PosY + m_Height > *pagebreak)
 135     {
 136         *pagebreak = m_PosY;
 137         return TRUE;
 138     }
 139
 140     return FALSE;
 141 }
 142
 143
 144
 145 void wxHtmlCell::SetLink(const wxHtmlLinkInfo& link)
 146 {
 147     if (m_Link) delete m_Link;
 148     m_Link = NULL;
 149     if (link.GetHref() != wxEmptyString)
 150         m_Link = new wxHtmlLinkInfo(link);
 151 }
 152
 153
 154 void wxHtmlCell::Layout(int WXUNUSED(w))
 155 {
 156     SetPos(0, 0);
 157 }
 158
 159
 160
 161 void wxHtmlCell::GetHorizontalConstraints(int *left, int *right) const
 162 {
 163     if (left)
 164         *left = m_PosX;
 165     if (right)
 166         *right = m_PosX + m_Width;
 167 }
 168
 169
 170
 171 const wxHtmlCell* wxHtmlCell::Find(int WXUNUSED(condition), const void* WXUNUSED(param)) const
 172 {
 173     return NULL;
 174 }
 175
 176
 177 wxHtmlCell *wxHtmlCell::FindCellByPos(wxCoord x, wxCoord y,
 178                                       unsigned flags) const
 179 {
 180     if ( x >= 0 && x < m_Width && y >= 0 && y < m_Height )
 181     {
 182         return wxConstCast(this, wxHtmlCell);
 183     }
 184     else
 185     {
 186         if ((flags & wxHTML_FIND_NEAREST_AFTER) &&
 187                 (y < 0 || (y < 0+m_Height && x < 0+m_Width)))
 188             return wxConstCast(this, wxHtmlCell);
 189         else if ((flags & wxHTML_FIND_NEAREST_BEFORE) &&
 190                 (y >= 0+m_Height || (y >= 0 && x >= 0)))
 191             return wxConstCast(this, wxHtmlCell);
 192         else
 193             return NULL;
 194     }
 195 }
 196
 197
 198 wxPoint wxHtmlCell::GetAbsPos() const
 199 {
 200     wxPoint p(m_PosX, m_PosY);
 201     for (wxHtmlCell *parent = m_Parent; parent; parent = parent->m_Parent)
 202     {
 203         p.x += parent->m_PosX;
 204         p.y += parent->m_PosY;
 205     }
 206     return p;
 207 }
 208
 209 unsigned wxHtmlCell::GetDepth() const
 210 {
 211     unsigned d = 0;
 212     for (wxHtmlCell *p = m_Parent; p; p = p->m_Parent)
 213         d++;
 214     return d;
 215 }
 216
 217 bool wxHtmlCell::IsBefore(wxHtmlCell *cell) const
 218 {
 219     const wxHtmlCell *c1 = this;
 220     const wxHtmlCell *c2 = cell;
 221     unsigned d1 = GetDepth();
 222     unsigned d2 = cell->GetDepth();
 223
 224     if ( d1 > d2 )
 225         for (; d1 != d2; d1-- )
 226             c1 = c1->m_Parent;
 227     else if ( d1 < d2 )
 228         for (; d1 != d2; d2-- )
 229             c2 = c2->m_Parent;
 230
 231     if ( cell == this )
 232         return true;
 233
 234     while ( c1 && c2 )
 235     {
 236         if ( c1->m_Parent == c2->m_Parent )
 237         {
 238             while ( c1 )
 239             {
 240                 if ( c1 == c2 )
 241                     return true;
 242                 c1 = c1->GetNext();
 243             }
 244             return false;
 245         }
 246         else
 247         {
 248             c1 = c1->m_Parent;
 249             c2 = c2->m_Parent;
 250         }
 251     }
 252
 253     wxFAIL_MSG(_T("Cells are in different trees"));
 254     return false;
 255 }
 256
 257
 258 //-----------------------------------------------------------------------------
 259 // wxHtmlWordCell
 260 //-----------------------------------------------------------------------------
 261
 262 wxHtmlWordCell::wxHtmlWordCell(const wxString& word, wxDC& dc) : wxHtmlCell()
 263 {
 264     m_Word = word;
 265     dc.GetTextExtent(m_Word, &m_Width, &m_Height, &m_Descent);
 266     SetCanLiveOnPagebreak(FALSE);
 267     m_allowLinebreak = true;
 268 }
 269
 270 void wxHtmlWordCell::SetPreviousWord(wxHtmlWordCell *cell)
 271 {
 272     if ( cell && m_Parent == cell->m_Parent &&
 273          !wxIsspace(cell->m_Word.Last()) && !wxIsspace(m_Word[0u]) )
 274     {
 275         m_allowLinebreak = false;
 276     }
 277 }
 278
 279 // Splits m_Word into up to three parts according to selection, returns
 280 // substring before, in and after selection and the points (in relative coords)
 281 // where s2 and s3 start:
 282 void wxHtmlWordCell::Split(wxDC& dc,
 283                            const wxPoint& selFrom, const wxPoint& selTo,
 284                            unsigned& pos1, unsigned& pos2) const
 285 {
 286     wxPoint pt1 = (selFrom == wxDefaultPosition) ?
 287                    wxDefaultPosition : selFrom - GetAbsPos();
 288     wxPoint pt2 = (selTo == wxDefaultPosition) ?
 289                    wxPoint(m_Width, -1) : selTo - GetAbsPos();
 290
 291     wxCoord charW, charH;
 292     unsigned len = m_Word.length();
 293     unsigned i = 0;
 294     pos1 = 0;
 295
 296     // adjust for cases when the start/end position is completely
 297     // outside the cell:
 298     if ( pt1.y < 0 )
 299         pt1.x = 0;
 300     if ( pt2.y >= m_Height )
 301         pt2.x = m_Width;
 302
 303     // before selection:
 304     while ( pt1.x > 0 && i < len )
 305     {
 306         dc.GetTextExtent(m_Word[i], &charW, &charH);
 307         pt1.x -= charW;
 308         if ( pt1.x >= 0 )
 309         {
 310             pos1 += charW;
 311             i++;
 312         }
 313     }
 314
 315     // in selection:
 316     unsigned j = i;
 317     pos2 = pos1;
 318     pt2.x -= pos2;
 319     while ( pt2.x > 0 && j < len )
 320     {
 321         dc.GetTextExtent(m_Word[j], &charW, &charH);
 322         pt2.x -= charW;
 323         if ( pt2.x >= 0 )
 324         {
 325             pos2 += charW;
 326             j++;
 327         }
 328     }
 329
 330     pos1 = i;
 331     pos2 = j;
 332 }
 333
 334 void wxHtmlWordCell::SetSelectionPrivPos(wxDC& dc, wxHtmlSelection *s) const
 335 {
 336     unsigned p1, p2;
 337
 338     Split(dc,
 339           this == s->GetFromCell() ? s->GetFromPos() : wxDefaultPosition,
 340           this == s->GetToCell() ? s->GetToPos() : wxDefaultPosition,
 341           p1, p2);
 342
 343     wxPoint p(0, m_Word.length());
 344
 345     if ( this == s->GetFromCell() )
 346         p.x = p1; // selection starts here
 347     if ( this == s->GetToCell() )
 348         p.y = p2; // selection ends here
 349
 350     if ( this == s->GetFromCell() )
 351         s->SetFromPrivPos(p);
 352     if ( this == s->GetToCell() )
 353         s->SetToPrivPos(p);
 354 }
 355
 356
 357 static void SwitchSelState(wxDC& dc, wxHtmlRenderingInfo& info,
 358                            bool toSelection)
 359 {
 360     wxColour fg = info.GetState().GetFgColour();
 361     wxColour bg = info.GetState().GetBgColour();
 362
 363     if ( toSelection )
 364     {
 365         dc.SetBackgroundMode(wxSOLID);
 366         dc.SetTextForeground(info.GetStyle().GetSelectedTextColour(fg));
 367         dc.SetTextBackground(info.GetStyle().GetSelectedTextBgColour(bg));
 368         dc.SetBackground(wxBrush(info.GetStyle().GetSelectedTextBgColour(bg),
 369                                  wxSOLID));
 370     }
 371     else
 372     {
 373         dc.SetBackgroundMode(wxTRANSPARENT);
 374         dc.SetTextForeground(fg);
 375         dc.SetTextBackground(bg);
 376         dc.SetBackground(wxBrush(bg, wxSOLID));
 377     }
 378 }
 379
 380
 381 void wxHtmlWordCell::Draw(wxDC& dc, int x, int y,
 382                           int WXUNUSED(view_y1), int WXUNUSED(view_y2),
 383                           wxHtmlRenderingInfo& info)
 384 {
 385 #if 0 // useful for debugging
 386     dc.DrawRectangle(x+m_PosX,y+m_PosY,m_Width,m_Height);
 387 #endif
 388
 389     bool drawSelectionAfterCell = false;
 390
 391     if ( info.GetState().GetSelectionState() == wxHTML_SEL_CHANGING )
 392     {
 393         // Selection changing, we must draw the word piecewise:
 394         wxHtmlSelection *s = info.GetSelection();
 395         wxString txt;
 396         int w, h;
 397         int ofs = 0;
 398
 399         wxPoint priv = (this == s->GetFromCell()) ?
 400                            s->GetFromPrivPos() : s->GetToPrivPos();
 401
 402         // NB: this is quite a hack: in order to compute selection boundaries
 403         //     (in word's characters) we must know current font, which is only
 404         //     possible inside rendering code. Therefore we update the
 405         //     information here and store it in wxHtmlSelection so that
 406         //     ConvertToText can use it later:
 407         if ( priv == wxDefaultPosition )
 408         {
 409             SetSelectionPrivPos(dc, s);
 410             priv = (this == s->GetFromCell()) ?
 411                     s->GetFromPrivPos() : s->GetToPrivPos();
 412         }
 413
 414         int part1 = priv.x;
 415         int part2 = priv.y;
 416
 417         if ( part1 > 0 )
 418         {
 419             txt = m_Word.Mid(0, part1);
 420             dc.DrawText(txt, x + m_PosX, y + m_PosY);
 421             dc.GetTextExtent(txt, &w, &h);
 422             ofs += w;
 423         }
 424
 425         SwitchSelState(dc, info, true);
 426
 427         txt = m_Word.Mid(part1, part2-part1);
 428         dc.DrawText(txt, ofs + x + m_PosX, y + m_PosY);
 429
 430         if ( (size_t)part2 < m_Word.length() )
 431         {
 432             dc.GetTextExtent(txt, &w, &h);
 433             ofs += w;
 434             SwitchSelState(dc, info, false);
 435             txt = m_Word.Mid(part2);
 436             dc.DrawText(txt, ofs + x + m_PosX, y + m_PosY);
 437         }
 438         else
 439             drawSelectionAfterCell = true;
 440     }
 441     else
 442     {
 443         wxHtmlSelectionState selstate = info.GetState().GetSelectionState();
 444         // Not changing selection state, draw the word in single mode:
 445         if ( selstate != wxHTML_SEL_OUT &&
 446              dc.GetBackgroundMode() != wxSOLID )
 447         {
 448             SwitchSelState(dc, info, true);
 449         }
 450         else if ( selstate == wxHTML_SEL_OUT &&
 451                   dc.GetBackgroundMode() == wxSOLID )
 452         {
 453             SwitchSelState(dc, info, false);
 454         }
 455         dc.DrawText(m_Word, x + m_PosX, y + m_PosY);
 456         drawSelectionAfterCell = (selstate != wxHTML_SEL_OUT);
 457     }
 458
 459     // NB: If the text is justified then there is usually some free space
 460     //     between adjacent cells and drawing the selection only onto cells
 461     //     would result in ugly unselected spaces. The code below detects
 462     //     this special case and renders the selection *outside* the sell,
 463     //     too.
 464     if ( m_Parent->GetAlignHor() == wxHTML_ALIGN_JUSTIFY &&
 465          drawSelectionAfterCell )
 466     {
 467         wxHtmlCell *nextCell = m_Next;
 468         while ( nextCell && nextCell->IsFormattingCell() )
 469             nextCell = nextCell->GetNext();
 470         if ( nextCell )
 471         {
 472             int nextX = nextCell->GetPosX();
 473             if ( m_PosX + m_Width < nextX )
 474             {
 475                 dc.SetBrush(dc.GetBackground());
 476                 dc.SetPen(*wxTRANSPARENT_PEN);
 477                 dc.DrawRectangle(x + m_PosX + m_Width, y + m_PosY,
 478                                  nextX - m_PosX - m_Width, m_Height);
 479             }
 480         }
 481     }
 482 }
 483
 484
 485 wxString wxHtmlWordCell::ConvertToText(wxHtmlSelection *s) const
 486 {
 487     if ( s && (this == s->GetFromCell() || this == s->GetToCell()) )
 488     {
 489         wxPoint priv = this == s->GetFromCell() ? s->GetFromPrivPos()
 490                                                 : s->GetToPrivPos();
 491
 492         // VZ: we may be called before we had a chance to re-render ourselves
 493         //     and in this case GetFrom/ToPrivPos() is not set yet -- assume
 494         //     that this only happens in case of a double/triple click (which
 495         //     seems to be the case now) and so it makes sense to select the
 496         //     entire contents of the cell in this case
 497         //
 498         // TODO: but this really needs to be fixed in some better way later...
 499         if ( priv != wxDefaultPosition )
 500         {
 501             int part1 = priv.x;
 502             int part2 = priv.y;
 503             return m_Word.Mid(part1, part2-part1);
 504         }
 505         //else: return the whole word below
 506     }
 507
 508     return m_Word;
 509 }
 510
 511 wxCursor wxHtmlWordCell::GetCursor() const
 512 {
 513     if ( !GetLink() )
 514     {
 515         if ( !gs_cursorText )
 516             gs_cursorText = new wxCursor(wxCURSOR_IBEAM);
 517         return *gs_cursorText;
 518     }
 519     else
 520         return wxHtmlCell::GetCursor();
 521 }
 522
 523
 524 //-----------------------------------------------------------------------------
 525 // wxHtmlContainerCell
 526 //-----------------------------------------------------------------------------
 527
 528
 529 wxHtmlContainerCell::wxHtmlContainerCell(wxHtmlContainerCell *parent) : wxHtmlCell()
 530 {
 531     m_Cells = m_LastCell = NULL;
 532     m_Parent = parent;
 533     if (m_Parent) m_Parent->InsertCell(this);
 534     m_AlignHor = wxHTML_ALIGN_LEFT;
 535     m_AlignVer = wxHTML_ALIGN_BOTTOM;
 536     m_IndentLeft = m_IndentRight = m_IndentTop = m_IndentBottom = 0;
 537     m_WidthFloat = 100; m_WidthFloatUnits = wxHTML_UNITS_PERCENT;
 538     m_UseBkColour = FALSE;
 539     m_UseBorder = FALSE;
 540     m_MinHeight = 0;
 541     m_MinHeightAlign = wxHTML_ALIGN_TOP;
 542     m_LastLayout = -1;
 543 }
 544
 545 wxHtmlContainerCell::~wxHtmlContainerCell()
 546 {
 547     wxHtmlCell *cell = m_Cells;
 548     while ( cell )
 549     {
 550         wxHtmlCell *cellNext = cell->GetNext();
 551         delete cell;
 552         cell = cellNext;
 553     }
 554 }
 555
 556
 557
 558 void wxHtmlContainerCell::SetIndent(int i, int what, int units)
 559 {
 560     int val = (units == wxHTML_UNITS_PIXELS) ? i : -i;
 561     if (what & wxHTML_INDENT_LEFT) m_IndentLeft = val;
 562     if (what & wxHTML_INDENT_RIGHT) m_IndentRight = val;
 563     if (what & wxHTML_INDENT_TOP) m_IndentTop = val;
 564     if (what & wxHTML_INDENT_BOTTOM) m_IndentBottom = val;
 565     m_LastLayout = -1;
 566 }
 567
 568
 569
 570 int wxHtmlContainerCell::GetIndent(int ind) const
 571 {
 572     if (ind & wxHTML_INDENT_LEFT) return m_IndentLeft;
 573     else if (ind & wxHTML_INDENT_RIGHT) return m_IndentRight;
 574     else if (ind & wxHTML_INDENT_TOP) return m_IndentTop;
 575     else if (ind & wxHTML_INDENT_BOTTOM) return m_IndentBottom;
 576     else return -1; /* BUG! Should not be called... */
 577 }
 578
 579
 580
 581
 582 int wxHtmlContainerCell::GetIndentUnits(int ind) const
 583 {
 584     bool p = FALSE;
 585     if (ind & wxHTML_INDENT_LEFT) p = m_IndentLeft < 0;
 586     else if (ind & wxHTML_INDENT_RIGHT) p = m_IndentRight < 0;
 587     else if (ind & wxHTML_INDENT_TOP) p = m_IndentTop < 0;
 588     else if (ind & wxHTML_INDENT_BOTTOM) p = m_IndentBottom < 0;
 589     if (p) return wxHTML_UNITS_PERCENT;
 590     else return wxHTML_UNITS_PIXELS;
 591 }
 592
 593
 594
 595 bool wxHtmlContainerCell::AdjustPagebreak(int *pagebreak, int* known_pagebreaks, int number_of_pages) const
 596 {
 597     if (!m_CanLiveOnPagebreak)
 598         return wxHtmlCell::AdjustPagebreak(pagebreak, known_pagebreaks, number_of_pages);
 599
 600     else
 601     {
 602         wxHtmlCell *c = GetFirstChild();
 603         bool rt = FALSE;
 604         int pbrk = *pagebreak - m_PosY;
 605
 606         while (c)
 607         {
 608             if (c->AdjustPagebreak(&pbrk, known_pagebreaks, number_of_pages))
 609                 rt = TRUE;
 610             c = c->GetNext();
 611         }
 612         if (rt)
 613             *pagebreak = pbrk + m_PosY;
 614         return rt;
 615     }
 616 }
 617
 618
 619
 620 void wxHtmlContainerCell::Layout(int w)
 621 {
 622     wxHtmlCell::Layout(w);
 623
 624     if (m_LastLayout == w) return;
 625
 626     // VS: Any attempt to layout with negative or zero width leads to hell,
 627     // but we can't ignore such attempts completely, since it sometimes
 628     // happen (e.g. when trying how small a table can be). The best thing we
 629     // can do is to set the width of child cells to zero
 630     if (w < 1)
 631     {
 632        m_Width = 0;
 633        for (wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext())
 634             cell->Layout(0);
 635             // this does two things: it recursively calls this code on all
 636             // child contrainers and resets children's position to (0,0)
 637        return;
 638     }
 639
 640     wxHtmlCell *cell = m_Cells, *line = m_Cells;
 641     wxHtmlCell *nextCell;
 642     long xpos = 0, ypos = m_IndentTop;
 643     int xdelta = 0, ybasicpos = 0, ydiff;
 644     int s_width, nextWordWidth, s_indent;
 645     int ysizeup = 0, ysizedown = 0;
 646     int MaxLineWidth = 0;
 647     int xcnt = 0;
 648
 649
 650     /*
 651
 652     WIDTH ADJUSTING :
 653
 654     */
 655
 656     if (m_WidthFloatUnits == wxHTML_UNITS_PERCENT)
 657     {
 658         if (m_WidthFloat < 0) m_Width = (100 + m_WidthFloat) * w / 100;
 659         else m_Width = m_WidthFloat * w / 100;
 660     }
 661     else
 662     {
 663         if (m_WidthFloat < 0) m_Width = w + m_WidthFloat;
 664         else m_Width = m_WidthFloat;
 665     }
 666
 667     if (m_Cells)
 668     {
 669         int l = (m_IndentLeft < 0) ? (-m_IndentLeft * m_Width / 100) : m_IndentLeft;
 670         int r = (m_IndentRight < 0) ? (-m_IndentRight * m_Width / 100) : m_IndentRight;
 671         for (wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext())
 672             cell->Layout(m_Width - (l + r));
 673     }
 674
 675     /*
 676
 677     LAYOUTING :
 678
 679     */
 680
 681     // adjust indentation:
 682     s_indent = (m_IndentLeft < 0) ? (-m_IndentLeft * m_Width / 100) : m_IndentLeft;
 683     s_width = m_Width - s_indent - ((m_IndentRight < 0) ? (-m_IndentRight * m_Width / 100) : m_IndentRight);
 684
 685     // my own layouting:
 686     while (cell != NULL)
 687     {
 688         switch (m_AlignVer)
 689         {
 690             case wxHTML_ALIGN_TOP :      ybasicpos = 0; break;
 691             case wxHTML_ALIGN_BOTTOM :   ybasicpos = - cell->GetHeight(); break;
 692             case wxHTML_ALIGN_CENTER :   ybasicpos = - cell->GetHeight() / 2; break;
 693         }
 694         ydiff = cell->GetHeight() + ybasicpos;
 695
 696         if (cell->GetDescent() + ydiff > ysizedown) ysizedown = cell->GetDescent() + ydiff;
 697         if (ybasicpos + cell->GetDescent() < -ysizeup) ysizeup = - (ybasicpos + cell->GetDescent());
 698
 699         // layout nonbreakable run of cells:
 700         cell->SetPos(xpos, ybasicpos + cell->GetDescent());
 701         xpos += cell->GetWidth();
 702         cell = cell->GetNext();
 703         xcnt++;
 704
 705         // compute length of the next word that would be added:
 706         nextWordWidth = 0;
 707         if (cell)
 708         {
 709             nextCell = cell;
 710             do
 711             {
 712                 nextWordWidth += nextCell->GetWidth();
 713                 nextCell = nextCell->GetNext();
 714             } while (nextCell && !nextCell->IsLinebreakAllowed());
 715         }
 716
 717         // force new line if occured:
 718         if ((cell == NULL) ||
 719             (xpos + nextWordWidth > s_width && cell->IsLinebreakAllowed()))
 720         {
 721             if (xpos > MaxLineWidth) MaxLineWidth = xpos;
 722             if (ysizeup < 0) ysizeup = 0;
 723             if (ysizedown < 0) ysizedown = 0;
 724             switch (m_AlignHor) {
 725                 case wxHTML_ALIGN_LEFT :
 726                 case wxHTML_ALIGN_JUSTIFY :
 727                          xdelta = 0;
 728                          break;
 729                 case wxHTML_ALIGN_RIGHT :
 730                          xdelta = 0 + (s_width - xpos);
 731                          break;
 732                 case wxHTML_ALIGN_CENTER :
 733                          xdelta = 0 + (s_width - xpos) / 2;
 734                          break;
 735             }
 736             if (xdelta < 0) xdelta = 0;
 737             xdelta += s_indent;
 738
 739             ypos += ysizeup;
 740
 741             if (m_AlignHor != wxHTML_ALIGN_JUSTIFY || cell == NULL)
 742                 while (line != cell)
 743                 {
 744                     line->SetPos(line->GetPosX() + xdelta,
 745                                    ypos + line->GetPosY());
 746                     line = line->GetNext();
 747                 }
 748             else
 749             {
 750                 int counter = 0;
 751                 int step = (s_width - xpos);
 752                 if (step < 0) step = 0;
 753                 xcnt--;
 754                 if (xcnt > 0) while (line != cell)
 755                 {
 756                     line->SetPos(line->GetPosX() + s_indent +
 757                                    (counter++ * step / xcnt),
 758                                    ypos + line->GetPosY());
 759                     line = line->GetNext();
 760                 }
 761                 xcnt++;
 762             }
 763
 764             ypos += ysizedown;
 765             xpos = xcnt = 0;
 766             ysizeup = ysizedown = 0;
 767             line = cell;
 768         }
 769     }
 770
 771     // setup height & width, depending on container layout:
 772     m_Height = ypos + (ysizedown + ysizeup) + m_IndentBottom;
 773
 774     if (m_Height < m_MinHeight)
 775     {
 776         if (m_MinHeightAlign != wxHTML_ALIGN_TOP)
 777         {
 778             int diff = m_MinHeight - m_Height;
 779             if (m_MinHeightAlign == wxHTML_ALIGN_CENTER) diff /= 2;
 780             cell = m_Cells;
 781             while (cell)
 782             {
 783                 cell->SetPos(cell->GetPosX(), cell->GetPosY() + diff);
 784                 cell = cell->GetNext();
 785             }
 786         }
 787         m_Height = m_MinHeight;
 788     }
 789
 790     MaxLineWidth += s_indent + ((m_IndentRight < 0) ? (-m_IndentRight * m_Width / 100) : m_IndentRight);
 791     if (m_Width < MaxLineWidth) m_Width = MaxLineWidth;
 792
 793     m_LastLayout = w;
 794 }
 795
 796 void wxHtmlContainerCell::UpdateRenderingStatePre(wxHtmlRenderingInfo& info,
 797                                                   wxHtmlCell *cell) const
 798 {
 799     wxHtmlSelection *s = info.GetSelection();
 800     if (!s) return;
 801     if (s->GetFromCell() == cell || s->GetToCell() == cell)
 802     {
 803         info.GetState().SetSelectionState(wxHTML_SEL_CHANGING);
 804     }
 805 }
 806
 807 void wxHtmlContainerCell::UpdateRenderingStatePost(wxHtmlRenderingInfo& info,
 808                                                    wxHtmlCell *cell) const
 809 {
 810     wxHtmlSelection *s = info.GetSelection();
 811     if (!s) return;
 812     if (s->GetToCell() == cell)
 813         info.GetState().SetSelectionState(wxHTML_SEL_OUT);
 814     else if (s->GetFromCell() == cell)
 815         info.GetState().SetSelectionState(wxHTML_SEL_IN);
 816 }
 817
 818 #define mMin(a, b) (((a) < (b)) ? (a) : (b))
 819 #define mMax(a, b) (((a) < (b)) ? (b) : (a))
 820
 821 void wxHtmlContainerCell::Draw(wxDC& dc, int x, int y, int view_y1, int view_y2,
 822                                wxHtmlRenderingInfo& info)
 823 {
 824     // container visible, draw it:
 825     if ((y + m_PosY <= view_y2) && (y + m_PosY + m_Height > view_y1))
 826     {
 827         if (m_UseBkColour)
 828         {
 829             wxBrush myb = wxBrush(m_BkColour, wxSOLID);
 830
 831             int real_y1 = mMax(y + m_PosY, view_y1);
 832             int real_y2 = mMin(y + m_PosY + m_Height - 1, view_y2);
 833
 834             dc.SetBrush(myb);
 835             dc.SetPen(*wxTRANSPARENT_PEN);
 836             dc.DrawRectangle(x + m_PosX, real_y1, m_Width, real_y2 - real_y1 + 1);
 837         }
 838
 839         if (m_UseBorder)
 840         {
 841             wxPen mypen1(m_BorderColour1, 1, wxSOLID);
 842             wxPen mypen2(m_BorderColour2, 1, wxSOLID);
 843
 844             dc.SetPen(mypen1);
 845             dc.DrawLine(x + m_PosX, y + m_PosY, x + m_PosX, y + m_PosY + m_Height - 1);
 846             dc.DrawLine(x + m_PosX, y + m_PosY, x + m_PosX + m_Width, y + m_PosY);
 847             dc.SetPen(mypen2);
 848             dc.DrawLine(x + m_PosX + m_Width - 1, y + m_PosY, x + m_PosX +  m_Width - 1, y + m_PosY + m_Height - 1);
 849             dc.DrawLine(x + m_PosX, y + m_PosY + m_Height - 1, x + m_PosX + m_Width, y + m_PosY + m_Height - 1);
 850         }
 851
 852         if (m_Cells)
 853         {
 854             // draw container's contents:
 855             for (wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext())
 856             {
 857                 UpdateRenderingStatePre(info, cell);
 858                 cell->Draw(dc,
 859                            x + m_PosX, y + m_PosY, view_y1, view_y2,
 860                            info);
 861                 UpdateRenderingStatePost(info, cell);
 862             }
 863         }
 864     }
 865     // container invisible, just proceed font+color changing:
 866     else
 867     {
 868         DrawInvisible(dc, x, y, info);
 869     }
 870 }
 871
 872
 873
 874 void wxHtmlContainerCell::DrawInvisible(wxDC& dc, int x, int y,
 875                                         wxHtmlRenderingInfo& info)
 876 {
 877     if (m_Cells)
 878     {
 879         for (wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext())
 880         {
 881             UpdateRenderingStatePre(info, cell);
 882             cell->DrawInvisible(dc, x + m_PosX, y + m_PosY, info);
 883             UpdateRenderingStatePost(info, cell);
 884         }
 885     }
 886 }
 887
 888
 889 wxColour wxHtmlContainerCell::GetBackgroundColour()
 890 {
 891     if (m_UseBkColour)
 892         return m_BkColour;
 893     else
 894         return wxNullColour;
 895 }
 896
 897
 898
 899 wxHtmlLinkInfo *wxHtmlContainerCell::GetLink(int x, int y) const
 900 {
 901     wxHtmlCell *cell = FindCellByPos(x, y);
 902
 903     // VZ: I don't know if we should pass absolute or relative coords to
 904     //     wxHtmlCell::GetLink()? As the base class version just ignores them
 905     //     anyhow, it hardly matters right now but should still be clarified
 906     return cell ? cell->GetLink(x, y) : NULL;
 907 }
 908
 909
 910
 911 void wxHtmlContainerCell::InsertCell(wxHtmlCell *f)
 912 {
 913     if (!m_Cells) m_Cells = m_LastCell = f;
 914     else
 915     {
 916         m_LastCell->SetNext(f);
 917         m_LastCell = f;
 918         if (m_LastCell) while (m_LastCell->GetNext()) m_LastCell = m_LastCell->GetNext();
 919     }
 920     f->SetParent(this);
 921     m_LastLayout = -1;
 922 }
 923
 924
 925
 926 void wxHtmlContainerCell::SetAlign(const wxHtmlTag& tag)
 927 {
 928     if (tag.HasParam(wxT("ALIGN")))
 929     {
 930         wxString alg = tag.GetParam(wxT("ALIGN"));
 931         alg.MakeUpper();
 932         if (alg == wxT("CENTER"))
 933             SetAlignHor(wxHTML_ALIGN_CENTER);
 934         else if (alg == wxT("LEFT"))
 935             SetAlignHor(wxHTML_ALIGN_LEFT);
 936         else if (alg == wxT("JUSTIFY"))
 937             SetAlignHor(wxHTML_ALIGN_JUSTIFY);
 938         else if (alg == wxT("RIGHT"))
 939             SetAlignHor(wxHTML_ALIGN_RIGHT);
 940         m_LastLayout = -1;
 941     }
 942 }
 943
 944
 945
 946 void wxHtmlContainerCell::SetWidthFloat(const wxHtmlTag& tag, double pixel_scale)
 947 {
 948     if (tag.HasParam(wxT("WIDTH")))
 949     {
 950         int wdi;
 951         wxString wd = tag.GetParam(wxT("WIDTH"));
 952
 953         if (wd[wd.Length()-1] == wxT('%'))
 954         {
 955             wxSscanf(wd.c_str(), wxT("%i%%"), &wdi);
 956             SetWidthFloat(wdi, wxHTML_UNITS_PERCENT);
 957         }
 958         else
 959         {
 960             wxSscanf(wd.c_str(), wxT("%i"), &wdi);
 961             SetWidthFloat((int)(pixel_scale * (double)wdi), wxHTML_UNITS_PIXELS);
 962         }
 963         m_LastLayout = -1;
 964     }
 965 }
 966
 967
 968
 969 const wxHtmlCell* wxHtmlContainerCell::Find(int condition, const void* param) const
 970 {
 971     if (m_Cells)
 972     {
 973         const wxHtmlCell *r = NULL;
 974
 975         for (wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext())
 976         {
 977             r = cell->Find(condition, param);
 978             if (r) return r;
 979         }
 980     }
 981     return NULL;
 982 }
 983
 984
 985 wxHtmlCell *wxHtmlContainerCell::FindCellByPos(wxCoord x, wxCoord y,
 986                                                unsigned flags) const
 987 {
 988     if ( flags & wxHTML_FIND_EXACT )
 989     {
 990         for ( const wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext() )
 991         {
 992             int cx = cell->GetPosX(),
 993                 cy = cell->GetPosY();
 994
 995             if ( (cx <= x) && (cx + cell->GetWidth() > x) &&
 996                  (cy <= y) && (cy + cell->GetHeight() > y) )
 997             {
 998                 return cell->FindCellByPos(x - cx, y - cy, flags);
 999             }
1000         }
1001     }
1002     else if ( flags & wxHTML_FIND_NEAREST_AFTER )
1003     {
1004         wxHtmlCell *c;
1005         for ( const wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext() )
1006         {
1007             if ( cell->IsFormattingCell() )
1008                 continue;
1009             int cellY = cell->GetPosY();
1010             if (!( y < cellY || (y < cellY + cell->GetHeight() &&
1011                                  x < cell->GetPosX() + cell->GetWidth()) ))
1012                 continue;
1013
1014             c = cell->FindCellByPos(x - cell->GetPosX(), y - cellY, flags);
1015             if (c) return c;
1016         }
1017     }
1018     else if ( flags & wxHTML_FIND_NEAREST_BEFORE )
1019     {
1020         wxHtmlCell *c2, *c = NULL;
1021         for ( const wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext() )
1022         {
1023             if ( cell->IsFormattingCell() )
1024                 continue;
1025             int cellY = cell->GetPosY();
1026             if (!( cellY + cell->GetHeight() <= y ||
1027                    (y >= cellY && x >= cell->GetPosX()) ))
1028                 break;
1029             c2 = cell->FindCellByPos(x - cell->GetPosX(), y - cellY, flags);
1030             if (c2)
1031                 c = c2;
1032         }
1033         if (c) return c;
1034     }
1035
1036     return NULL;
1037 }
1038
1039
1040 void wxHtmlContainerCell::OnMouseClick(wxWindow *parent, int x, int y, const wxMouseEvent& event)
1041 {
1042     wxHtmlCell *cell = FindCellByPos(x, y);
1043     if ( cell )
1044         cell->OnMouseClick(parent, x, y, event);
1045 }
1046
1047
1048
1049 void wxHtmlContainerCell::GetHorizontalConstraints(int *left, int *right) const
1050 {
1051     int cleft = m_PosX + m_Width, cright = m_PosX; // worst case
1052     int l, r;
1053
1054     for (wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext())
1055     {
1056         cell->GetHorizontalConstraints(&l, &r);
1057         if (l < cleft)
1058             cleft = l;
1059         if (r > cright)
1060             cright = r;
1061     }
1062
1063     cleft -= (m_IndentLeft < 0) ? (-m_IndentLeft * m_Width / 100) : m_IndentLeft;
1064     cright += (m_IndentRight < 0) ? (-m_IndentRight * m_Width / 100) : m_IndentRight;
1065
1066     if (left)
1067         *left = cleft;
1068     if (right)
1069         *right = cright;
1070 }
1071
1072
1073 wxHtmlCell *wxHtmlContainerCell::GetFirstTerminal() const
1074 {
1075     if ( m_Cells )
1076     {
1077         wxHtmlCell *c2;
1078         for (wxHtmlCell *c = m_Cells; c; c = c->GetNext())
1079         {
1080             c2 = c->GetFirstTerminal();
1081             if ( c2 )
1082                 return c2;
1083         }
1084     }
1085     return NULL;
1086 }
1087
1088 wxHtmlCell *wxHtmlContainerCell::GetLastTerminal() const
1089 {
1090     if ( m_Cells )
1091     {
1092         // most common case first:
1093         wxHtmlCell *c = m_LastCell->GetLastTerminal();
1094         if ( c )
1095             return c;
1096
1097         wxHtmlCell *c2 = NULL;
1098         for (c = m_Cells; c; c = c->GetNext())
1099             c2 = c->GetLastTerminal();
1100         return c2;
1101     }
1102     else
1103         return NULL;
1104 }
1105
1106
1107
1108
1109 // --------------------------------------------------------------------------
1110 // wxHtmlColourCell
1111 // --------------------------------------------------------------------------
1112
1113 void wxHtmlColourCell::Draw(wxDC& dc,
1114                             int x, int y,
1115                             int WXUNUSED(view_y1), int WXUNUSED(view_y2),
1116                             wxHtmlRenderingInfo& info)
1117 {
1118     DrawInvisible(dc, x, y, info);
1119 }
1120
1121 void wxHtmlColourCell::DrawInvisible(wxDC& dc,
1122                                      int WXUNUSED(x), int WXUNUSED(y),
1123                                      wxHtmlRenderingInfo& info)
1124 {
1125     wxHtmlRenderingState& state = info.GetState();
1126     if (m_Flags & wxHTML_CLR_FOREGROUND)
1127     {
1128         state.SetFgColour(m_Colour);
1129         if (state.GetSelectionState() != wxHTML_SEL_IN)
1130             dc.SetTextForeground(m_Colour);
1131         else
1132             dc.SetTextForeground(
1133                     info.GetStyle().GetSelectedTextColour(m_Colour));
1134     }
1135     if (m_Flags & wxHTML_CLR_BACKGROUND)
1136     {
1137         state.SetBgColour(m_Colour);
1138         if (state.GetSelectionState() != wxHTML_SEL_IN)
1139         {
1140             dc.SetTextBackground(m_Colour);
1141             dc.SetBackground(wxBrush(m_Colour, wxSOLID));
1142         }
1143         else
1144         {
1145             wxColour c = info.GetStyle().GetSelectedTextBgColour(m_Colour);
1146             dc.SetTextBackground(c);
1147             dc.SetBackground(wxBrush(c, wxSOLID));
1148         }
1149     }
1150 }
1151
1152
1153
1154
1155 // ---------------------------------------------------------------------------
1156 // wxHtmlFontCell
1157 // ---------------------------------------------------------------------------
1158
1159 void wxHtmlFontCell::Draw(wxDC& dc,
1160                           int WXUNUSED(x), int WXUNUSED(y),
1161                           int WXUNUSED(view_y1), int WXUNUSED(view_y2),
1162                           wxHtmlRenderingInfo& WXUNUSED(info))
1163 {
1164     dc.SetFont(m_Font);
1165 }
1166
1167 void wxHtmlFontCell::DrawInvisible(wxDC& dc, int WXUNUSED(x), int WXUNUSED(y),
1168                                    wxHtmlRenderingInfo& WXUNUSED(info))
1169 {
1170     dc.SetFont(m_Font);
1171 }
1172
1173
1174
1175
1176
1177
1178
1179
1180 // ---------------------------------------------------------------------------
1181 // wxHtmlWidgetCell
1182 // ---------------------------------------------------------------------------
1183
1184 wxHtmlWidgetCell::wxHtmlWidgetCell(wxWindow *wnd, int w)
1185 {
1186     int sx, sy;
1187     m_Wnd = wnd;
1188     m_Wnd->GetSize(&sx, &sy);
1189     m_Width = sx, m_Height = sy;
1190     m_WidthFloat = w;
1191 }
1192
1193
1194 void wxHtmlWidgetCell::Draw(wxDC& WXUNUSED(dc),
1195                             int WXUNUSED(x), int WXUNUSED(y),
1196                             int WXUNUSED(view_y1), int WXUNUSED(view_y2),
1197                             wxHtmlRenderingInfo& WXUNUSED(info))
1198 {
1199     int absx = 0, absy = 0, stx, sty;
1200     wxHtmlCell *c = this;
1201
1202     while (c)
1203     {
1204         absx += c->GetPosX();
1205         absy += c->GetPosY();
1206         c = c->GetParent();
1207     }
1208
1209     ((wxScrolledWindow*)(m_Wnd->GetParent()))->GetViewStart(&stx, &sty);
1210     m_Wnd->SetSize(absx - wxHTML_SCROLL_STEP * stx, absy  - wxHTML_SCROLL_STEP * sty, m_Width, m_Height);
1211 }
1212
1213
1214
1215 void wxHtmlWidgetCell::DrawInvisible(wxDC& WXUNUSED(dc),
1216                                      int WXUNUSED(x), int WXUNUSED(y),
1217                                      wxHtmlRenderingInfo& WXUNUSED(info))
1218 {
1219     int absx = 0, absy = 0, stx, sty;
1220     wxHtmlCell *c = this;
1221
1222     while (c)
1223     {
1224         absx += c->GetPosX();
1225         absy += c->GetPosY();
1226         c = c->GetParent();
1227     }
1228
1229     ((wxScrolledWindow*)(m_Wnd->GetParent()))->GetViewStart(&stx, &sty);
1230     m_Wnd->SetSize(absx - wxHTML_SCROLL_STEP * stx, absy  - wxHTML_SCROLL_STEP * sty, m_Width, m_Height);
1231 }
1232
1233
1234
1235 void wxHtmlWidgetCell::Layout(int w)
1236 {
1237     if (m_WidthFloat != 0)
1238     {
1239         m_Width = (w * m_WidthFloat) / 100;
1240         m_Wnd->SetSize(m_Width, m_Height);
1241     }
1242
1243     wxHtmlCell::Layout(w);
1244 }
1245
1246
1247
1248 // ----------------------------------------------------------------------------
1249 // wxHtmlTerminalCellsInterator
1250 // ----------------------------------------------------------------------------
1251
1252 const wxHtmlCell* wxHtmlTerminalCellsInterator::operator++()
1253 {
1254     if ( !m_pos )
1255         return NULL;
1256
1257     do
1258     {
1259         if ( m_pos == m_to )
1260         {
1261             m_pos = NULL;
1262             return NULL;
1263         }
1264
1265         if ( m_pos->GetNext() )
1266             m_pos = m_pos->GetNext();
1267         else
1268         {
1269             // we must go up the hierarchy until we reach container where this
1270             // is not the last child, and then go down to first terminal cell:
1271             while ( m_pos->GetNext() == NULL )
1272             {
1273                 m_pos = m_pos->GetParent();
1274                 if ( !m_pos )
1275                     return NULL;
1276             }
1277             m_pos = m_pos->GetNext();
1278         }
1279         while ( m_pos->GetFirstChild() != NULL )
1280             m_pos = m_pos->GetFirstChild();
1281     } while ( !m_pos->IsTerminalCell() );
1282
1283     return m_pos;
1284 }
1285
1286
1287
1288
1289
1290
1291
1292 //-----------------------------------------------------------------------------
1293 // Cleanup
1294 //-----------------------------------------------------------------------------
1295
1296 class wxHtmlCellModule: public wxModule
1297 {
1298 DECLARE_DYNAMIC_CLASS(wxHtmlCellModule)
1299 public:
1300     wxHtmlCellModule() : wxModule() {}
1301     bool OnInit() { return true; }
1302     void OnExit()
1303     {
1304         wxDELETE(gs_cursorLink);
1305         wxDELETE(gs_cursorText);
1306     }
1307 };
1308
1309 IMPLEMENT_DYNAMIC_CLASS(wxHtmlCellModule, wxModule)
1310
1311 #endif