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 #if wxUSE_HTML
  18
  19 #ifdef __BORDLANDC__
  20 #pragma hdrstop
  21 #endif
  22
  23 #ifndef WXPRECOMP
  24 #include "wx/wx.h"
  25 #endif
  26
  27 #include "wx/html/htmlcell.h"
  28 #include "wx/html/htmlwin.h"
  29 #include <stdlib.h>
  30
  31
  32 //-----------------------------------------------------------------------------
  33 // wxHtmlCell
  34 //-----------------------------------------------------------------------------
  35
  36 wxHtmlCell::wxHtmlCell() : wxObject()
  37 {
  38     m_Next = NULL;
  39     m_Parent = NULL;
  40     m_Width = m_Height = m_Descent = 0;
  41     m_CanLiveOnPagebreak = TRUE;
  42     m_Link = NULL;
  43 }
  44
  45 wxHtmlCell::~wxHtmlCell()
  46 {
  47     if (m_Link) delete m_Link;
  48     if (m_Next) delete m_Next;
  49 }
  50
  51
  52 void wxHtmlCell::OnMouseClick(wxWindow *parent, int x, int y,
  53                               const wxMouseEvent& event)
  54 {
  55     wxHtmlLinkInfo *lnk = GetLink(x, y);
  56     if (lnk != NULL)
  57     {
  58         wxHtmlLinkInfo lnk2(*lnk);
  59         lnk2.SetEvent(&event);
  60         lnk2.SetHtmlCell(this);
  61         ((wxHtmlWindow*)parent) -> OnLinkClicked(lnk2);
  62         // note : this overcasting is legal because parent is *always* wxHtmlWindow
  63     }
  64 }
  65
  66
  67
  68 bool wxHtmlCell::AdjustPagebreak(int *pagebreak)
  69 {
  70     if ((!m_CanLiveOnPagebreak) &&
  71                 m_PosY < *pagebreak && m_PosY + m_Height > *pagebreak) {
  72         *pagebreak = m_PosY;
  73         if (m_Next != NULL) m_Next -> AdjustPagebreak(pagebreak);
  74         return TRUE;
  75     }
  76
  77     else {
  78         if (m_Next != NULL) return m_Next -> AdjustPagebreak(pagebreak);
  79         else return FALSE;
  80     }
  81 }
  82
  83
  84
  85 void wxHtmlCell::SetLink(const wxHtmlLinkInfo& link)
  86 {
  87     if (m_Link) delete m_Link;
  88     m_Link = new wxHtmlLinkInfo(link);
  89 }
  90
  91
  92
  93 //-----------------------------------------------------------------------------
  94 // wxHtmlWordCell
  95 //-----------------------------------------------------------------------------
  96
  97 wxHtmlWordCell::wxHtmlWordCell(const wxString& word, wxDC& dc) : wxHtmlCell()
  98 {
  99     m_Word = word;
 100
 101     if (m_Word.Find(wxT('&')) != -1)
 102     {
 103         static wxChar* substitutions[][3] =
 104                 {
 105                     { wxT("&nbsp;"), wxT("&nbsp "), wxT(" ") },
 106                     { wxT("&copy;"), wxT("&copy "), wxT("(c)") },
 107                     { wxT("&quot;"), wxT("&quot "), wxT("\"") },
 108                     { wxT("&lt;"), wxT("&lt "), wxT("<") },
 109                     { wxT("&gt;"), wxT("&gt "), wxT(">") },
 110                     { wxT("&amp;"), wxT("&amp "), wxT("&")  /*this one should be last one*/ },
 111                     { NULL, NULL, NULL }
 112                 };
 113
 114         for (int i = 0; substitutions[i][0] != NULL; i++)
 115         {
 116             m_Word.Replace(substitutions[i][0], substitutions[i][2], TRUE);
 117             m_Word.Replace(substitutions[i][1], substitutions[i][2], TRUE);
 118         }
 119     }
 120
 121     dc.GetTextExtent(m_Word, &m_Width, &m_Height, &m_Descent);
 122     SetCanLiveOnPagebreak(FALSE);
 123 }
 124
 125
 126
 127 void wxHtmlWordCell::Draw(wxDC& dc, int x, int y, int view_y1, int view_y2)
 128 {
 129     dc.DrawText(m_Word, x + m_PosX, y + m_PosY);
 130     wxHtmlCell::Draw(dc, x, y, view_y1, view_y2);
 131 }
 132
 133
 134
 135 //-----------------------------------------------------------------------------
 136 // wxHtmlContainerCell
 137 //-----------------------------------------------------------------------------
 138
 139
 140 wxHtmlContainerCell::wxHtmlContainerCell(wxHtmlContainerCell *parent) : wxHtmlCell()
 141 {
 142     m_Cells = m_LastCell = NULL;
 143     m_Parent = parent;
 144     if (m_Parent) m_Parent -> InsertCell(this);
 145     m_AlignHor = wxHTML_ALIGN_LEFT;
 146     m_AlignVer = wxHTML_ALIGN_BOTTOM;
 147     m_IndentLeft = m_IndentRight = m_IndentTop = m_IndentBottom = 0;
 148     m_WidthFloat = 100; m_WidthFloatUnits = wxHTML_UNITS_PERCENT;
 149     m_UseBkColour = FALSE;
 150     m_UseBorder = FALSE;
 151     m_MinHeight = m_MaxLineWidth = 0;
 152     m_MinHeightAlign = wxHTML_ALIGN_TOP;
 153 }
 154
 155
 156
 157 void wxHtmlContainerCell::SetIndent(int i, int what, int units)
 158 {
 159     int val = (units == wxHTML_UNITS_PIXELS) ? i : -i;
 160     if (what & wxHTML_INDENT_LEFT) m_IndentLeft = val;
 161     if (what & wxHTML_INDENT_RIGHT) m_IndentRight = val;
 162     if (what & wxHTML_INDENT_TOP) m_IndentTop = val;
 163     if (what & wxHTML_INDENT_BOTTOM) m_IndentBottom = val;
 164 }
 165
 166
 167
 168 int wxHtmlContainerCell::GetIndent(int ind) const
 169 {
 170     if (ind & wxHTML_INDENT_LEFT) return m_IndentLeft;
 171     else if (ind & wxHTML_INDENT_RIGHT) return m_IndentRight;
 172     else if (ind & wxHTML_INDENT_TOP) return m_IndentTop;
 173     else if (ind & wxHTML_INDENT_BOTTOM) return m_IndentBottom;
 174     else return -1; /* BUG! Should not be called... */
 175 }
 176
 177
 178
 179
 180 int wxHtmlContainerCell::GetIndentUnits(int ind) const
 181 {
 182     bool p = FALSE;
 183     if (ind & wxHTML_INDENT_LEFT) p = m_IndentLeft < 0;
 184     else if (ind & wxHTML_INDENT_RIGHT) p = m_IndentRight < 0;
 185     else if (ind & wxHTML_INDENT_TOP) p = m_IndentTop < 0;
 186     else if (ind & wxHTML_INDENT_BOTTOM) p = m_IndentBottom < 0;
 187     if (p) return wxHTML_UNITS_PERCENT;
 188     else return wxHTML_UNITS_PIXELS;
 189 }
 190
 191
 192
 193 bool wxHtmlContainerCell::AdjustPagebreak(int *pagebreak)
 194 {
 195     if (!m_CanLiveOnPagebreak)
 196         return wxHtmlCell::AdjustPagebreak(pagebreak);
 197
 198     else {
 199         wxHtmlCell *c = GetFirstCell();
 200         bool rt = FALSE;
 201         int pbrk = *pagebreak - m_PosY;
 202
 203         while (c) {
 204             if (c -> AdjustPagebreak(&pbrk)) rt = TRUE;
 205             c = c -> GetNext();
 206         }
 207         if (rt) *pagebreak = pbrk + m_PosY;
 208         return rt;
 209     }
 210 }
 211
 212
 213
 214 void wxHtmlContainerCell::Layout(int w)
 215 {
 216     wxHtmlCell *cell = m_Cells, *line = m_Cells;
 217     long xpos = 0, ypos = m_IndentTop;
 218     int xdelta = 0, ybasicpos = 0, ydiff;
 219     int s_width, s_indent;
 220     int ysizeup = 0, ysizedown = 0;
 221
 222     /*
 223
 224     WIDTH ADJUSTING :
 225
 226     */
 227
 228     if (m_WidthFloatUnits == wxHTML_UNITS_PERCENT) {
 229         if (m_WidthFloat < 0) m_Width = (100 + m_WidthFloat) * w / 100;
 230         else m_Width = m_WidthFloat * w / 100;
 231     }
 232     else {
 233         if (m_WidthFloat < 0) m_Width = w + m_WidthFloat;
 234         else m_Width = m_WidthFloat;
 235     }
 236
 237     if (m_Cells) {
 238         int l = (m_IndentLeft < 0) ? (-m_IndentLeft * m_Width / 100) : m_IndentLeft;
 239         int r = (m_IndentRight < 0) ? (-m_IndentRight * m_Width / 100) : m_IndentRight;
 240         m_Cells -> Layout(m_Width - (l + r));
 241     }
 242
 243     /*
 244
 245     LAYOUTING :
 246
 247     */
 248
 249     // adjust indentation:
 250     s_indent = (m_IndentLeft < 0) ? (-m_IndentLeft * m_Width / 100) : m_IndentLeft;
 251     s_width = m_Width - s_indent - ((m_IndentRight < 0) ? (-m_IndentRight * m_Width / 100) : m_IndentRight);
 252
 253     m_MaxLineWidth = 0;
 254
 255     // my own layouting:
 256     while (cell != NULL) {
 257         switch (m_AlignVer) {
 258             case wxHTML_ALIGN_TOP :      ybasicpos = 0; break;
 259             case wxHTML_ALIGN_BOTTOM :   ybasicpos = - cell -> GetHeight(); break;
 260             case wxHTML_ALIGN_CENTER :   ybasicpos = - cell -> GetHeight() / 2; break;
 261         }
 262         ydiff = cell -> GetHeight() + ybasicpos;
 263
 264         if (cell -> GetDescent() + ydiff > ysizedown) ysizedown = cell -> GetDescent() + ydiff;
 265         if (ybasicpos + cell -> GetDescent() < -ysizeup) ysizeup = - (ybasicpos + cell -> GetDescent());
 266
 267         cell -> SetPos(xpos, ybasicpos + cell -> GetDescent());
 268         xpos += cell -> GetWidth();
 269         cell = cell -> GetNext();
 270
 271         // force new line if occured:
 272         if ((cell == NULL) || (xpos + cell -> GetWidth() > s_width)) {
 273             if (xpos > m_MaxLineWidth) m_MaxLineWidth = xpos;
 274             if (ysizeup < 0) ysizeup = 0;
 275             if (ysizedown < 0) ysizedown = 0;
 276             switch (m_AlignHor) {
 277                 case wxHTML_ALIGN_LEFT : xdelta = 0; break;
 278                 case wxHTML_ALIGN_RIGHT : xdelta = 0 + (s_width - xpos); break;
 279                 case wxHTML_ALIGN_CENTER : xdelta = 0 + (s_width - xpos) / 2; break;
 280             }
 281             if (xdelta < 0) xdelta = 0;
 282             xdelta += s_indent;
 283
 284             ypos += ysizeup;
 285             while (line != cell) {
 286                 line -> SetPos(line -> GetPosX() + xdelta, ypos + line -> GetPosY());
 287                 line = line -> GetNext();
 288             }
 289
 290             ypos += ysizedown;
 291             xpos = 0;
 292             ysizeup = ysizedown = 0;
 293             line = cell;
 294         }
 295     }
 296
 297     // setup height & width, depending on container layout:
 298     m_Height = ypos + (ysizedown + ysizeup) + m_IndentBottom;
 299
 300     if (m_Height < m_MinHeight) {
 301         if (m_MinHeightAlign != wxHTML_ALIGN_TOP) {
 302             int diff = m_MinHeight - m_Height;
 303             if (m_MinHeightAlign == wxHTML_ALIGN_CENTER) diff /= 2;
 304             cell = m_Cells;
 305             while (cell) {
 306                 cell -> SetPos(cell -> GetPosX(), cell -> GetPosY() + diff);
 307                 cell = cell -> GetNext();
 308             }
 309         }
 310         m_Height = m_MinHeight;
 311     }
 312
 313     m_MaxLineWidth += s_indent + ((m_IndentRight < 0) ? (-m_IndentRight * m_Width / 100) : m_IndentRight);
 314     if (m_Width < m_MaxLineWidth) m_Width = m_MaxLineWidth;
 315
 316     wxHtmlCell::Layout(w);
 317 }
 318
 319
 320 #define mMin(a, b) (((a) < (b)) ? (a) : (b))
 321 #define mMax(a, b) (((a) < (b)) ? (b) : (a))
 322
 323 void wxHtmlContainerCell::Draw(wxDC& dc, int x, int y, int view_y1, int view_y2)
 324 {
 325     // container visible, draw it:
 326     if ((y + m_PosY < view_y2) && (y + m_PosY + m_Height > view_y1)) {
 327
 328         if (m_UseBkColour) {
 329             wxBrush myb = wxBrush(m_BkColour, wxSOLID);
 330
 331             int real_y1 = mMax(y + m_PosY, view_y1);
 332             int real_y2 = mMin(y + m_PosY + m_Height - 1, view_y2);
 333
 334             dc.SetBrush(myb);
 335             dc.SetPen(*wxTRANSPARENT_PEN);
 336             dc.DrawRectangle(x + m_PosX, real_y1, m_Width, real_y2 - real_y1 + 1);
 337         }
 338
 339         if (m_UseBorder) {
 340             wxPen mypen1(m_BorderColour1, 1, wxSOLID);
 341             wxPen mypen2(m_BorderColour2, 1, wxSOLID);
 342
 343             dc.SetPen(mypen1);
 344             dc.DrawLine(x + m_PosX, y + m_PosY, x + m_PosX, y + m_PosY + m_Height - 1);
 345             dc.DrawLine(x + m_PosX, y + m_PosY, x + m_PosX + m_Width - 1, y + m_PosY);
 346             dc.SetPen(mypen2);
 347             dc.DrawLine(x + m_PosX + m_Width - 1, y + m_PosY, x + m_PosX +  m_Width - 1, y + m_PosY + m_Height - 1);
 348             dc.DrawLine(x + m_PosX, y + m_PosY + m_Height - 1, x + m_PosX + m_Width - 1, y + m_PosY + m_Height - 1);
 349         }
 350
 351         if (m_Cells) m_Cells -> Draw(dc, x + m_PosX, y + m_PosY, view_y1, view_y2);
 352     }
 353     // container invisible, just proceed font+color changing:
 354     else {
 355         if (m_Cells) m_Cells -> DrawInvisible(dc, x + m_PosX, y + m_PosY);
 356     }
 357
 358     wxHtmlCell::Draw(dc, x, y, view_y1, view_y2);
 359 }
 360
 361
 362
 363 void wxHtmlContainerCell::DrawInvisible(wxDC& dc, int x, int y)
 364 {
 365     if (m_Cells) m_Cells -> DrawInvisible(dc, x + m_PosX, y + m_PosY);
 366     wxHtmlCell::DrawInvisible(dc, x, y);
 367 }
 368
 369
 370
 371 wxHtmlLinkInfo *wxHtmlContainerCell::GetLink(int x, int y) const
 372 {
 373     wxHtmlCell *c = m_Cells;
 374     int cx, cy, cw, ch;
 375
 376     while (c) {
 377         cx = c -> GetPosX(), cy = c -> GetPosY();
 378         cw = c -> GetWidth(), ch = c -> GetHeight();
 379         if ((x >= cx) && (x < cx + cw) && (y >= cy) && (y < cy + ch))
 380             return c -> GetLink(x - cx, y - cy);
 381         c = c -> GetNext();
 382     }
 383     return NULL;
 384 }
 385
 386
 387
 388 void wxHtmlContainerCell::InsertCell(wxHtmlCell *f)
 389 {
 390     if (!m_Cells) m_Cells = m_LastCell = f;
 391     else {
 392         m_LastCell -> SetNext(f);
 393         m_LastCell = f;
 394         if (m_LastCell) while (m_LastCell -> GetNext()) m_LastCell = m_LastCell -> GetNext();
 395     }
 396     f -> SetParent(this);
 397 }
 398
 399
 400
 401 void wxHtmlContainerCell::SetAlign(const wxHtmlTag& tag)
 402 {
 403     if (tag.HasParam(wxT("ALIGN"))) {
 404         wxString alg = tag.GetParam(wxT("ALIGN"));
 405         alg.MakeUpper();
 406         if (alg == wxT("CENTER"))
 407             SetAlignHor(wxHTML_ALIGN_CENTER);
 408         else if (alg == wxT("LEFT"))
 409             SetAlignHor(wxHTML_ALIGN_LEFT);
 410         else if (alg == wxT("RIGHT"))
 411             SetAlignHor(wxHTML_ALIGN_RIGHT);
 412     }
 413 }
 414
 415
 416
 417 void wxHtmlContainerCell::SetWidthFloat(const wxHtmlTag& tag, double pixel_scale)
 418 {
 419     if (tag.HasParam(wxT("WIDTH"))) {
 420         int wdi;
 421         wxString wd = tag.GetParam(wxT("WIDTH"));
 422
 423         if (wd[wd.Length()-1] == wxT('%')) {
 424             wxSscanf(wd.c_str(), wxT("%i%%"), &wdi);
 425             SetWidthFloat(wdi, wxHTML_UNITS_PERCENT);
 426         }
 427         else {
 428             wxSscanf(wd.c_str(), wxT("%i"), &wdi);
 429             SetWidthFloat((int)(pixel_scale * (double)wdi), wxHTML_UNITS_PIXELS);
 430         }
 431     }
 432 }
 433
 434
 435
 436 const wxHtmlCell* wxHtmlContainerCell::Find(int condition, const void* param) const
 437 {
 438     const wxHtmlCell *r = NULL;
 439
 440     if (m_Cells) {
 441         r = m_Cells -> Find(condition, param);
 442         if (r) return r;
 443     }
 444
 445     return wxHtmlCell::Find(condition, param);
 446 }
 447
 448
 449
 450 void wxHtmlContainerCell::OnMouseClick(wxWindow *parent, int x, int y, const wxMouseEvent& event)
 451 {
 452     if (m_Cells) {
 453         wxHtmlCell *c = m_Cells;
 454         while (c) {
 455             if (    (c -> GetPosX() <= x) &&
 456                     (c -> GetPosY() <= y) &&
 457                     (c -> GetPosX() + c -> GetWidth() > x) &&
 458                     (c -> GetPosY() + c -> GetHeight() > y)) {
 459                 c -> OnMouseClick(parent, x - c -> GetPosX(), y - c -> GetPosY(), event);
 460                 break;
 461             }
 462             c = c -> GetNext();
 463         }
 464     }
 465 }
 466
 467
 468
 469
 470
 471 //--------------------------------------------------------------------------------
 472 // wxHtmlColourCell
 473 //--------------------------------------------------------------------------------
 474
 475 void wxHtmlColourCell::Draw(wxDC& dc, int x, int y, int view_y1, int view_y2)
 476 {
 477     if (m_Flags & wxHTML_CLR_FOREGROUND)
 478         dc.SetTextForeground(m_Colour);
 479     if (m_Flags & wxHTML_CLR_BACKGROUND) {
 480         dc.SetBackground(wxBrush(m_Colour, wxSOLID));
 481         dc.SetTextBackground(m_Colour);
 482     }
 483     wxHtmlCell::Draw(dc, x, y, view_y1, view_y2);
 484 }
 485
 486 void wxHtmlColourCell::DrawInvisible(wxDC& dc, int x, int y)
 487 {
 488     if (m_Flags & wxHTML_CLR_FOREGROUND)
 489         dc.SetTextForeground(m_Colour);
 490     if (m_Flags & wxHTML_CLR_BACKGROUND) {
 491         dc.SetBackground(wxBrush(m_Colour, wxSOLID));
 492         dc.SetTextBackground(m_Colour);
 493     }
 494     wxHtmlCell::DrawInvisible(dc, x, y);
 495 }
 496
 497
 498
 499
 500 //--------------------------------------------------------------------------------
 501 // wxHtmlFontCell
 502 //--------------------------------------------------------------------------------
 503
 504 void wxHtmlFontCell::Draw(wxDC& dc, int x, int y, int view_y1, int view_y2)
 505 {
 506     dc.SetFont(m_Font);
 507     wxHtmlCell::Draw(dc, x, y, view_y1, view_y2);
 508 }
 509
 510 void wxHtmlFontCell::DrawInvisible(wxDC& dc, int x, int y)
 511 {
 512     dc.SetFont(m_Font);
 513     wxHtmlCell::DrawInvisible(dc, x, y);
 514 }
 515
 516
 517
 518
 519
 520
 521
 522
 523 //--------------------------------------------------------------------------------
 524 // wxHtmlWidgetCell
 525 //--------------------------------------------------------------------------------
 526
 527 wxHtmlWidgetCell::wxHtmlWidgetCell(wxWindow *wnd, int w)
 528 {
 529     int sx, sy;
 530     m_Wnd = wnd;
 531     m_Wnd -> GetSize(&sx, &sy);
 532     m_Width = sx, m_Height = sy;
 533     m_WidthFloat = w;
 534 }
 535
 536
 537 void wxHtmlWidgetCell::Draw(wxDC& dc, int x, int y, int view_y1, int view_y2)
 538 {
 539     int absx = 0, absy = 0, stx, sty;
 540     wxHtmlCell *c = this;
 541
 542     while (c) {
 543         absx += c -> GetPosX();
 544         absy += c -> GetPosY();
 545         c = c -> GetParent();
 546     }
 547
 548     ((wxScrolledWindow*)(m_Wnd -> GetParent())) -> ViewStart(&stx, &sty);
 549     m_Wnd -> SetSize(absx - wxHTML_SCROLL_STEP * stx, absy  - wxHTML_SCROLL_STEP * sty, m_Width, m_Height);
 550
 551     wxHtmlCell::Draw(dc, x, y, view_y1, view_y2);
 552 }
 553
 554
 555
 556 void wxHtmlWidgetCell::DrawInvisible(wxDC& dc, int x, int y)
 557 {
 558     int absx = 0, absy = 0, stx, sty;
 559     wxHtmlCell *c = this;
 560
 561     while (c) {
 562         absx += c -> GetPosX();
 563         absy += c -> GetPosY();
 564         c = c -> GetParent();
 565     }
 566
 567     ((wxScrolledWindow*)(m_Wnd -> GetParent())) -> ViewStart(&stx, &sty);
 568     m_Wnd -> SetSize(absx - wxHTML_SCROLL_STEP * stx, absy  - wxHTML_SCROLL_STEP * sty, m_Width, m_Height);
 569
 570     wxHtmlCell::DrawInvisible(dc, x, y);
 571 }
 572
 573
 574
 575 void wxHtmlWidgetCell::Layout(int w)
 576 {
 577     if (m_WidthFloat != 0) {
 578         m_Width = (w * m_WidthFloat) / 100;
 579         m_Wnd -> SetSize(m_Width, m_Height);
 580     }
 581
 582     wxHtmlCell::Layout(w);
 583 }
 584
 585 #endif