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