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
  12 #endif
  13
  14 #include "wx/wxprec.h"
  15
  16 #include "wx/defs.h"
  17
  18 #if wxUSE_HTML && wxUSE_STREAMS
  19
  20 #ifdef __BORDLANDC__
  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 <stdlib.h>
  33
  34
  35 //-----------------------------------------------------------------------------
  36 // wxHtmlCell
  37 //-----------------------------------------------------------------------------
  38
  39 wxHtmlCell::wxHtmlCell() : wxObject()
  40 {
  41     m_Next = NULL;
  42     m_Parent = NULL;
  43     m_Width = m_Height = m_Descent = 0;
  44     m_CanLiveOnPagebreak = TRUE;
  45     m_Link = NULL;
  46 }
  47
  48 wxHtmlCell::~wxHtmlCell()
  49 {
  50     if (m_Link) delete m_Link;
  51 }
  52
  53
  54 void wxHtmlCell::OnMouseClick(wxWindow *parent, int x, int y,
  55                               const wxMouseEvent& event)
  56 {
  57     wxHtmlLinkInfo *lnk = GetLink(x, y);
  58     if (lnk != NULL)
  59     {
  60         wxHtmlLinkInfo lnk2(*lnk);
  61         lnk2.SetEvent(&event);
  62         lnk2.SetHtmlCell(this);
  63         ((wxHtmlWindow*)parent)->OnLinkClicked(lnk2);
  64         // note : this overcasting is legal because parent is *always* wxHtmlWindow
  65     }
  66 }
  67
  68
  69
  70 bool wxHtmlCell::AdjustPagebreak(int *pagebreak) const
  71 {
  72     if ((!m_CanLiveOnPagebreak) &&
  73                 m_PosY < *pagebreak && m_PosY + m_Height > *pagebreak)
  74         {
  75         *pagebreak = m_PosY;
  76         return TRUE;
  77     }
  78     else
  79         return FALSE;
  80 }
  81
  82
  83
  84 void wxHtmlCell::SetLink(const wxHtmlLinkInfo& link)
  85 {
  86     if (m_Link) delete m_Link;
  87     m_Link = NULL;
  88     if (link.GetHref() != wxEmptyString)
  89         m_Link = new wxHtmlLinkInfo(link);
  90 }
  91
  92
  93
  94 void wxHtmlCell::Layout(int w)
  95 {
  96     SetPos(0, 0);
  97 }
  98
  99
 100 const wxHtmlCell* wxHtmlCell::Find(int condition, const void* param) const
 101 {
 102     return NULL;
 103 }
 104
 105
 106
 107 //-----------------------------------------------------------------------------
 108 // wxHtmlWordCell
 109 //-----------------------------------------------------------------------------
 110
 111 wxHtmlWordCell::wxHtmlWordCell(const wxString& word, wxDC& dc) : wxHtmlCell()
 112 {
 113     m_Word = word;
 114     dc.GetTextExtent(m_Word, &m_Width, &m_Height, &m_Descent);
 115     SetCanLiveOnPagebreak(FALSE);
 116 }
 117
 118
 119
 120 void wxHtmlWordCell::Draw(wxDC& dc, int x, int y, int view_y1, int view_y2)
 121 {
 122     dc.DrawText(m_Word, x + m_PosX, y + m_PosY);
 123 }
 124
 125
 126
 127 //-----------------------------------------------------------------------------
 128 // wxHtmlContainerCell
 129 //-----------------------------------------------------------------------------
 130
 131
 132 wxHtmlContainerCell::wxHtmlContainerCell(wxHtmlContainerCell *parent) : wxHtmlCell()
 133 {
 134     m_Cells = m_LastCell = NULL;
 135     m_Parent = parent;
 136     if (m_Parent) m_Parent->InsertCell(this);
 137     m_AlignHor = wxHTML_ALIGN_LEFT;
 138     m_AlignVer = wxHTML_ALIGN_BOTTOM;
 139     m_IndentLeft = m_IndentRight = m_IndentTop = m_IndentBottom = 0;
 140     m_WidthFloat = 100; m_WidthFloatUnits = wxHTML_UNITS_PERCENT;
 141     m_UseBkColour = FALSE;
 142     m_UseBorder = FALSE;
 143     m_MinHeight = 0;
 144     m_MinHeightAlign = wxHTML_ALIGN_TOP;
 145     m_LastLayout = -1;
 146 }
 147
 148 wxHtmlContainerCell::~wxHtmlContainerCell()
 149 {
 150     wxHtmlCell *cell = m_Cells;
 151     while ( cell )
 152     {
 153         wxHtmlCell *cellNext = cell->GetNext();
 154         delete cell;
 155         cell = cellNext;
 156     }
 157 }
 158
 159
 160
 161 void wxHtmlContainerCell::SetIndent(int i, int what, int units)
 162 {
 163     int val = (units == wxHTML_UNITS_PIXELS) ? i : -i;
 164     if (what & wxHTML_INDENT_LEFT) m_IndentLeft = val;
 165     if (what & wxHTML_INDENT_RIGHT) m_IndentRight = val;
 166     if (what & wxHTML_INDENT_TOP) m_IndentTop = val;
 167     if (what & wxHTML_INDENT_BOTTOM) m_IndentBottom = val;
 168     m_LastLayout = -1;
 169 }
 170
 171
 172
 173 int wxHtmlContainerCell::GetIndent(int ind) const
 174 {
 175     if (ind & wxHTML_INDENT_LEFT) return m_IndentLeft;
 176     else if (ind & wxHTML_INDENT_RIGHT) return m_IndentRight;
 177     else if (ind & wxHTML_INDENT_TOP) return m_IndentTop;
 178     else if (ind & wxHTML_INDENT_BOTTOM) return m_IndentBottom;
 179     else return -1; /* BUG! Should not be called... */
 180 }
 181
 182
 183
 184
 185 int wxHtmlContainerCell::GetIndentUnits(int ind) const
 186 {
 187     bool p = FALSE;
 188     if (ind & wxHTML_INDENT_LEFT) p = m_IndentLeft < 0;
 189     else if (ind & wxHTML_INDENT_RIGHT) p = m_IndentRight < 0;
 190     else if (ind & wxHTML_INDENT_TOP) p = m_IndentTop < 0;
 191     else if (ind & wxHTML_INDENT_BOTTOM) p = m_IndentBottom < 0;
 192     if (p) return wxHTML_UNITS_PERCENT;
 193     else return wxHTML_UNITS_PIXELS;
 194 }
 195
 196
 197
 198 bool wxHtmlContainerCell::AdjustPagebreak(int *pagebreak) const
 199 {
 200     if (!m_CanLiveOnPagebreak)
 201         return wxHtmlCell::AdjustPagebreak(pagebreak);
 202
 203     else
 204     {
 205         wxHtmlCell *c = GetFirstCell();
 206         bool rt = FALSE;
 207         int pbrk = *pagebreak - m_PosY;
 208
 209         while (c)
 210             {
 211             if (c->AdjustPagebreak(&pbrk))
 212                 rt = TRUE;
 213             c = c->GetNext();
 214         }
 215         if (rt)
 216             *pagebreak = pbrk + m_PosY;
 217         return rt;
 218     }
 219 }
 220
 221
 222
 223 void wxHtmlContainerCell::Layout(int w)
 224 {
 225     if (m_LastLayout == w)
 226     {
 227         wxHtmlCell::Layout(w);
 228         return;
 229     }
 230
 231     wxHtmlCell *cell = m_Cells, *line = m_Cells;
 232     long xpos = 0, ypos = m_IndentTop;
 233     int xdelta = 0, ybasicpos = 0, ydiff;
 234     int s_width, s_indent;
 235     int ysizeup = 0, ysizedown = 0;
 236     int MaxLineWidth = 0;
 237     int xcnt = 0;
 238
 239
 240     /*
 241
 242     WIDTH ADJUSTING :
 243
 244     */
 245
 246     if (m_WidthFloatUnits == wxHTML_UNITS_PERCENT)
 247     {
 248         if (m_WidthFloat < 0) m_Width = (100 + m_WidthFloat) * w / 100;
 249         else m_Width = m_WidthFloat * w / 100;
 250     }
 251     else
 252     {
 253         if (m_WidthFloat < 0) m_Width = w + m_WidthFloat;
 254         else m_Width = m_WidthFloat;
 255     }
 256
 257     if (m_Cells)
 258     {
 259         int l = (m_IndentLeft < 0) ? (-m_IndentLeft * m_Width / 100) : m_IndentLeft;
 260         int r = (m_IndentRight < 0) ? (-m_IndentRight * m_Width / 100) : m_IndentRight;
 261         for (wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext())
 262             cell->Layout(m_Width - (l + r));
 263     }
 264
 265     /*
 266
 267     LAYOUTING :
 268
 269     */
 270
 271     // adjust indentation:
 272     s_indent = (m_IndentLeft < 0) ? (-m_IndentLeft * m_Width / 100) : m_IndentLeft;
 273     s_width = m_Width - s_indent - ((m_IndentRight < 0) ? (-m_IndentRight * m_Width / 100) : m_IndentRight);
 274
 275     // my own layouting:
 276     while (cell != NULL)
 277     {
 278         switch (m_AlignVer)
 279             {
 280             case wxHTML_ALIGN_TOP :      ybasicpos = 0; break;
 281             case wxHTML_ALIGN_BOTTOM :   ybasicpos = - cell->GetHeight(); break;
 282             case wxHTML_ALIGN_CENTER :   ybasicpos = - cell->GetHeight() / 2; break;
 283         }
 284         ydiff = cell->GetHeight() + ybasicpos;
 285
 286         if (cell->GetDescent() + ydiff > ysizedown) ysizedown = cell->GetDescent() + ydiff;
 287         if (ybasicpos + cell->GetDescent() < -ysizeup) ysizeup = - (ybasicpos + cell->GetDescent());
 288
 289         cell->SetPos(xpos, ybasicpos + cell->GetDescent());
 290         xpos += cell->GetWidth();
 291         cell = cell->GetNext();
 292         xcnt++;
 293
 294         // force new line if occured:
 295         if ((cell == NULL) || (xpos + cell->GetWidth() > s_width))
 296             {
 297             if (xpos > MaxLineWidth) MaxLineWidth = xpos;
 298             if (ysizeup < 0) ysizeup = 0;
 299             if (ysizedown < 0) ysizedown = 0;
 300             switch (m_AlignHor) {
 301                 case wxHTML_ALIGN_LEFT :
 302                 case wxHTML_ALIGN_JUSTIFY :
 303                          xdelta = 0;
 304                          break;
 305                 case wxHTML_ALIGN_RIGHT :
 306                          xdelta = 0 + (s_width - xpos);
 307                          break;
 308                 case wxHTML_ALIGN_CENTER :
 309                          xdelta = 0 + (s_width - xpos) / 2;
 310                          break;
 311             }
 312             if (xdelta < 0) xdelta = 0;
 313             xdelta += s_indent;
 314
 315             ypos += ysizeup;
 316
 317             if (m_AlignHor != wxHTML_ALIGN_JUSTIFY || cell == NULL)
 318                 while (line != cell)
 319                         {
 320                     line->SetPos(line->GetPosX() + xdelta,
 321                                    ypos + line->GetPosY());
 322                     line = line->GetNext();
 323                 }
 324             else
 325             {
 326                 int counter = 0;
 327                 int step = (s_width - xpos);
 328                 if (step < 0) step = 0;
 329                 xcnt--;
 330                 if (xcnt > 0) while (line != cell)
 331                         {
 332                     line->SetPos(line->GetPosX() + s_indent +
 333                                    (counter++ * step / xcnt),
 334                                    ypos + line->GetPosY());
 335                     line = line->GetNext();
 336                 }
 337                 xcnt++;
 338             }
 339
 340             ypos += ysizedown;
 341             xpos = xcnt = 0;
 342             ysizeup = ysizedown = 0;
 343             line = cell;
 344         }
 345     }
 346
 347     // setup height & width, depending on container layout:
 348     m_Height = ypos + (ysizedown + ysizeup) + m_IndentBottom;
 349
 350     if (m_Height < m_MinHeight)
 351     {
 352         if (m_MinHeightAlign != wxHTML_ALIGN_TOP)
 353             {
 354             int diff = m_MinHeight - m_Height;
 355             if (m_MinHeightAlign == wxHTML_ALIGN_CENTER) diff /= 2;
 356             cell = m_Cells;
 357             while (cell)
 358                 {
 359                 cell->SetPos(cell->GetPosX(), cell->GetPosY() + diff);
 360                 cell = cell->GetNext();
 361             }
 362         }
 363         m_Height = m_MinHeight;
 364     }
 365
 366     MaxLineWidth += s_indent + ((m_IndentRight < 0) ? (-m_IndentRight * m_Width / 100) : m_IndentRight);
 367     if (m_Width < MaxLineWidth) m_Width = MaxLineWidth;
 368
 369     m_LastLayout = w;
 370
 371     wxHtmlCell::Layout(w);
 372 }
 373
 374
 375 #define mMin(a, b) (((a) < (b)) ? (a) : (b))
 376 #define mMax(a, b) (((a) < (b)) ? (b) : (a))
 377
 378 void wxHtmlContainerCell::Draw(wxDC& dc, int x, int y, int view_y1, int view_y2)
 379 {
 380     // container visible, draw it:
 381     if ((y + m_PosY < view_y2) && (y + m_PosY + m_Height > view_y1))
 382     {
 383
 384         if (m_UseBkColour)
 385             {
 386             wxBrush myb = wxBrush(m_BkColour, wxSOLID);
 387
 388             int real_y1 = mMax(y + m_PosY, view_y1);
 389             int real_y2 = mMin(y + m_PosY + m_Height - 1, view_y2);
 390
 391             dc.SetBrush(myb);
 392             dc.SetPen(*wxTRANSPARENT_PEN);
 393             dc.DrawRectangle(x + m_PosX, real_y1, m_Width, real_y2 - real_y1 + 1);
 394         }
 395
 396         if (m_UseBorder)
 397             {
 398             wxPen mypen1(m_BorderColour1, 1, wxSOLID);
 399             wxPen mypen2(m_BorderColour2, 1, wxSOLID);
 400
 401             dc.SetPen(mypen1);
 402             dc.DrawLine(x + m_PosX, y + m_PosY, x + m_PosX, y + m_PosY + m_Height - 1);
 403             dc.DrawLine(x + m_PosX, y + m_PosY, x + m_PosX + m_Width - 1, y + m_PosY);
 404             dc.SetPen(mypen2);
 405             dc.DrawLine(x + m_PosX + m_Width - 1, y + m_PosY, x + m_PosX +  m_Width - 1, y + m_PosY + m_Height - 1);
 406             dc.DrawLine(x + m_PosX, y + m_PosY + m_Height - 1, x + m_PosX + m_Width - 1, y + m_PosY + m_Height - 1);
 407         }
 408
 409         if (m_Cells)
 410         {
 411             for (wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext())
 412                 cell->Draw(dc, x + m_PosX, y + m_PosY, view_y1, view_y2);
 413         }
 414     }
 415     // container invisible, just proceed font+color changing:
 416     else
 417     {
 418         if (m_Cells)
 419         {
 420             for (wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext())
 421                 cell->DrawInvisible(dc, x + m_PosX, y + m_PosY);
 422         }
 423     }
 424 }
 425
 426
 427
 428 void wxHtmlContainerCell::DrawInvisible(wxDC& dc, int x, int y)
 429 {
 430     if (m_Cells)
 431     {
 432         for (wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext())
 433             cell->DrawInvisible(dc, x + m_PosX, y + m_PosY);
 434     }
 435 }
 436
 437
 438
 439 wxHtmlLinkInfo *wxHtmlContainerCell::GetLink(int x, int y) const
 440 {
 441     wxHtmlCell *c = m_Cells;
 442     int cx, cy, cw, ch;
 443
 444     while (c)
 445     {
 446         cx = c->GetPosX(), cy = c->GetPosY();
 447         cw = c->GetWidth(), ch = c->GetHeight();
 448         if ((x >= cx) && (x < cx + cw) && (y >= cy) && (y < cy + ch))
 449             return c->GetLink(x - cx, y - cy);
 450         c = c->GetNext();
 451     }
 452     return NULL;
 453 }
 454
 455
 456
 457 void wxHtmlContainerCell::InsertCell(wxHtmlCell *f)
 458 {
 459     if (!m_Cells) m_Cells = m_LastCell = f;
 460     else
 461     {
 462         m_LastCell->SetNext(f);
 463         m_LastCell = f;
 464         if (m_LastCell) while (m_LastCell->GetNext()) m_LastCell = m_LastCell->GetNext();
 465     }
 466     f->SetParent(this);
 467     m_LastLayout = -1;
 468 }
 469
 470
 471
 472 void wxHtmlContainerCell::SetAlign(const wxHtmlTag& tag)
 473 {
 474     if (tag.HasParam(wxT("ALIGN")))
 475     {
 476         wxString alg = tag.GetParam(wxT("ALIGN"));
 477         alg.MakeUpper();
 478         if (alg == wxT("CENTER"))
 479             SetAlignHor(wxHTML_ALIGN_CENTER);
 480         else if (alg == wxT("LEFT"))
 481             SetAlignHor(wxHTML_ALIGN_LEFT);
 482         else if (alg == wxT("JUSTIFY"))
 483             SetAlignHor(wxHTML_ALIGN_JUSTIFY);
 484         else if (alg == wxT("RIGHT"))
 485             SetAlignHor(wxHTML_ALIGN_RIGHT);
 486         m_LastLayout = -1;
 487     }
 488 }
 489
 490
 491
 492 void wxHtmlContainerCell::SetWidthFloat(const wxHtmlTag& tag, double pixel_scale)
 493 {
 494     if (tag.HasParam(wxT("WIDTH")))
 495     {
 496         int wdi;
 497         wxString wd = tag.GetParam(wxT("WIDTH"));
 498
 499         if (wd[wd.Length()-1] == wxT('%'))
 500             {
 501             wxSscanf(wd.c_str(), wxT("%i%%"), &wdi);
 502             SetWidthFloat(wdi, wxHTML_UNITS_PERCENT);
 503         }
 504         else
 505             {
 506             wxSscanf(wd.c_str(), wxT("%i"), &wdi);
 507             SetWidthFloat((int)(pixel_scale * (double)wdi), wxHTML_UNITS_PIXELS);
 508         }
 509         m_LastLayout = -1;
 510     }
 511 }
 512
 513
 514
 515 const wxHtmlCell* wxHtmlContainerCell::Find(int condition, const void* param) const
 516 {
 517     if (m_Cells)
 518     {
 519         const wxHtmlCell *r = NULL;
 520
 521         for (wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext())
 522         {
 523             r = cell->Find(condition, param);
 524             if (r) return r;
 525         }
 526     }
 527     return NULL;
 528 }
 529
 530
 531
 532 void wxHtmlContainerCell::OnMouseClick(wxWindow *parent, int x, int y, const wxMouseEvent& event)
 533 {
 534     if (m_Cells)
 535     {
 536         wxHtmlCell *c = m_Cells;
 537         while (c)
 538             {
 539             if (    (c->GetPosX() <= x) &&
 540                     (c->GetPosY() <= y) &&
 541                     (c->GetPosX() + c->GetWidth() > x) &&
 542                     (c->GetPosY() + c->GetHeight() > y))
 543                     {
 544                 c->OnMouseClick(parent, x - c->GetPosX(), y - c->GetPosY(), event);
 545                 break;
 546             }
 547             c = c->GetNext();
 548         }
 549     }
 550 }
 551
 552
 553
 554
 555
 556 //--------------------------------------------------------------------------------
 557 // wxHtmlColourCell
 558 //--------------------------------------------------------------------------------
 559
 560 void wxHtmlColourCell::Draw(wxDC& dc, int x, int y, int view_y1, int view_y2)
 561 {
 562     if (m_Flags & wxHTML_CLR_FOREGROUND)
 563         dc.SetTextForeground(m_Colour);
 564     if (m_Flags & wxHTML_CLR_BACKGROUND)
 565     {
 566         dc.SetBackground(wxBrush(m_Colour, wxSOLID));
 567         dc.SetTextBackground(m_Colour);
 568     }
 569 }
 570
 571 void wxHtmlColourCell::DrawInvisible(wxDC& dc, int x, int y)
 572 {
 573     if (m_Flags & wxHTML_CLR_FOREGROUND)
 574         dc.SetTextForeground(m_Colour);
 575     if (m_Flags & wxHTML_CLR_BACKGROUND)
 576     {
 577         dc.SetBackground(wxBrush(m_Colour, wxSOLID));
 578         dc.SetTextBackground(m_Colour);
 579     }
 580 }
 581
 582
 583
 584
 585 //--------------------------------------------------------------------------------
 586 // wxHtmlFontCell
 587 //--------------------------------------------------------------------------------
 588
 589 void wxHtmlFontCell::Draw(wxDC& dc, int x, int y, int view_y1, int view_y2)
 590 {
 591     dc.SetFont(m_Font);
 592 }
 593
 594 void wxHtmlFontCell::DrawInvisible(wxDC& dc, int x, int y)
 595 {
 596     dc.SetFont(m_Font);
 597 }
 598
 599
 600
 601
 602
 603
 604
 605
 606 //--------------------------------------------------------------------------------
 607 // wxHtmlWidgetCell
 608 //--------------------------------------------------------------------------------
 609
 610 wxHtmlWidgetCell::wxHtmlWidgetCell(wxWindow *wnd, int w)
 611 {
 612     int sx, sy;
 613     m_Wnd = wnd;
 614     m_Wnd->GetSize(&sx, &sy);
 615     m_Width = sx, m_Height = sy;
 616     m_WidthFloat = w;
 617 }
 618
 619
 620 void wxHtmlWidgetCell::Draw(wxDC& dc, int x, int y, int view_y1, int view_y2)
 621 {
 622     int absx = 0, absy = 0, stx, sty;
 623     wxHtmlCell *c = this;
 624
 625     while (c)
 626     {
 627         absx += c->GetPosX();
 628         absy += c->GetPosY();
 629         c = c->GetParent();
 630     }
 631
 632     ((wxScrolledWindow*)(m_Wnd->GetParent()))->GetViewStart(&stx, &sty);
 633     m_Wnd->SetSize(absx - wxHTML_SCROLL_STEP * stx, absy  - wxHTML_SCROLL_STEP * sty, m_Width, m_Height);
 634 }
 635
 636
 637
 638 void wxHtmlWidgetCell::DrawInvisible(wxDC& dc, int x, int y)
 639 {
 640     int absx = 0, absy = 0, stx, sty;
 641     wxHtmlCell *c = this;
 642
 643     while (c)
 644     {
 645         absx += c->GetPosX();
 646         absy += c->GetPosY();
 647         c = c->GetParent();
 648     }
 649
 650     ((wxScrolledWindow*)(m_Wnd->GetParent()))->GetViewStart(&stx, &sty);
 651     m_Wnd->SetSize(absx - wxHTML_SCROLL_STEP * stx, absy  - wxHTML_SCROLL_STEP * sty, m_Width, m_Height);
 652 }
 653
 654
 655
 656 void wxHtmlWidgetCell::Layout(int w)
 657 {
 658     if (m_WidthFloat != 0)
 659     {
 660         m_Width = (w * m_WidthFloat) / 100;
 661         m_Wnd->SetSize(m_Width, m_Height);
 662     }
 663
 664     wxHtmlCell::Layout(w);
 665 }
 666
 667 #endif