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