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