src/html/m_tables.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        m_tables.cpp
   3 // Purpose:     wxHtml module for tables
   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 && wxUSE_STREAMS
  18 #ifdef __BORDLANDC__
  19 #pragma hdrstop
  20 #endif
  21
  22 #ifndef WXPRECOMP
  23 #include "wx/wx.h"
  24 #endif
  25
  26
  27 /*
  28 REMARKS:
  29     1. This version of m_tables doesn't support auto-layout algorithm.
  30        This means that all columns are of same width unless explicitly specified.
  31 */
  32
  33
  34 #include "wx/html/forcelnk.h"
  35 #include "wx/html/m_templ.h"
  36
  37 #include "wx/html/htmlcell.h"
  38
  39 FORCE_LINK_ME(m_tables)
  40
  41
  42 #define TABLE_BORDER_CLR_1  wxColour(0xC5, 0xC2, 0xC5)
  43 #define TABLE_BORDER_CLR_2  wxColour(0x62, 0x61, 0x62)
  44
  45
  46 //-----------------------------------------------------------------------------
  47 // wxHtmlTableCell
  48 //-----------------------------------------------------------------------------
  49
  50
  51 typedef struct {
  52         int width, units;
  53                 // universal
  54         int leftpos, pixwidth, maxrealwidth;
  55                 // temporary (depends on width of table)
  56     } colStruct;
  57
  58 typedef enum {
  59         cellSpan,
  60         cellUsed,
  61         cellFree
  62     } cellState;
  63
  64 typedef struct {
  65         wxHtmlContainerCell *cont;
  66         int colspan, rowspan;
  67         int minheight, valign;
  68         cellState flag;
  69     } cellStruct;
  70
  71
  72 class wxHtmlTableCell : public wxHtmlContainerCell
  73 {
  74     protected:
  75         /* These are real attributes: */
  76         bool m_HasBorders;
  77                 // should we draw borders or not?
  78         int m_NumCols, m_NumRows;
  79                 // number of columns; rows
  80         colStruct *m_ColsInfo;
  81                 // array of column information
  82         cellStruct **m_CellInfo;
  83                 // 2D array of all cells in the table : m_CellInfo[row][column]
  84         int m_Spacing;
  85                 // spaces between cells
  86         int m_Padding;
  87                 // cells internal indentation
  88
  89     private:
  90         /* ...and these are valid only during parsing of table: */
  91         int m_ActualCol, m_ActualRow;
  92                 // number of actual column (ranging from 0..m_NumCols)
  93
  94         // default values (for table and row):
  95         wxColour m_tBkg, m_rBkg;
  96         wxString m_tValign, m_rValign;
  97
  98         double m_PixelScale;
  99
 100
 101     public:
 102         wxHtmlTableCell(wxHtmlContainerCell *parent, const wxHtmlTag& tag, double pixel_scale = 1.0);
 103         ~wxHtmlTableCell();
 104         virtual void Layout(int w);
 105
 106         void AddRow(const wxHtmlTag& tag);
 107         void AddCell(wxHtmlContainerCell *cell, const wxHtmlTag& tag);
 108     private:
 109         void ReallocCols(int cols);
 110         void ReallocRows(int rows);
 111                 // reallocates memory to given number of cols/rows
 112                 // and changes m_NumCols/m_NumRows value to reflect this change
 113                 // NOTE! You CAN'T change m_NumCols/m_NumRows before calling this!!
 114 };
 115
 116
 117
 118 wxHtmlTableCell::wxHtmlTableCell(wxHtmlContainerCell *parent, const wxHtmlTag& tag, double pixel_scale)
 119  : wxHtmlContainerCell(parent)
 120 {
 121     m_PixelScale = pixel_scale;
 122     m_HasBorders = (tag.GetParam(wxT("BORDER")) != wxT("0"));
 123     m_ColsInfo = NULL;
 124     m_NumCols = m_NumRows = 0;
 125     m_CellInfo = NULL;
 126     m_ActualCol = m_ActualRow = -1;
 127
 128     /* scan params: */
 129     if (tag.HasParam(wxT("BGCOLOR")))
 130         tag.GetParamAsColour(wxT("BGCOLOR"), &m_tBkg);
 131     if (tag.HasParam(wxT("VALIGN")))
 132         m_tValign = tag.GetParam(wxT("VALIGN"));
 133     else
 134         m_tValign = wxEmptyString;
 135     if (!tag.GetParamAsInt(wxT("CELLSPACING"), &m_Spacing))
 136         m_Spacing = 2;
 137     if (!tag.GetParamAsInt(wxT("CELLPADDING"), &m_Padding))
 138         m_Padding = 3;
 139     m_Spacing = (int)(m_PixelScale * (double)m_Spacing);
 140     m_Padding = (int)(m_PixelScale * (double)m_Padding);
 141
 142     if (m_HasBorders)
 143         SetBorder(TABLE_BORDER_CLR_1, TABLE_BORDER_CLR_2);
 144 }
 145
 146
 147
 148 wxHtmlTableCell::~wxHtmlTableCell()
 149 {
 150     if (m_ColsInfo) free(m_ColsInfo);
 151     if (m_CellInfo)
 152     {
 153         for (int i = 0; i < m_NumRows; i++)
 154             free(m_CellInfo[i]);
 155         free(m_CellInfo);
 156     }
 157 }
 158
 159
 160
 161 void wxHtmlTableCell::ReallocCols(int cols)
 162 {
 163     int i,j;
 164
 165     for (i = 0; i < m_NumRows; i++)
 166     {
 167         m_CellInfo[i] = (cellStruct*) realloc(m_CellInfo[i], sizeof(cellStruct) * cols);
 168         for (j = m_NumCols; j < cols; j++)
 169             m_CellInfo[i][j].flag = cellFree;
 170     }
 171
 172     m_ColsInfo = (colStruct*) realloc(m_ColsInfo, sizeof(colStruct) * cols);
 173     for (j = m_NumCols; j < cols; j++)
 174     {
 175            m_ColsInfo[j].width = 0;
 176            m_ColsInfo[j].units = wxHTML_UNITS_PERCENT;
 177     }
 178
 179     m_NumCols = cols;
 180 }
 181
 182
 183
 184 void wxHtmlTableCell::ReallocRows(int rows)
 185 {
 186     m_CellInfo = (cellStruct**) realloc(m_CellInfo, sizeof(cellStruct*) * rows);
 187     for (int row = m_NumRows; row < rows ; row++)
 188     {
 189         if (m_NumCols == 0)
 190             m_CellInfo[row] = NULL;
 191         else
 192         {
 193             m_CellInfo[row] = (cellStruct*) malloc(sizeof(cellStruct) * m_NumCols);
 194             for (int col = 0; col < m_NumCols; col++)
 195                 m_CellInfo[row][col].flag = cellFree;
 196         }
 197     }
 198     m_NumRows = rows;
 199 }
 200
 201
 202 void wxHtmlTableCell::AddRow(const wxHtmlTag& tag)
 203 {
 204     m_ActualCol = -1;
 205     // VS: real allocation of row entry is done in AddCell in order
 206     //     to correctly handle empty rows (i.e. "<tr></tr>")
 207     //     m_ActualCol == -1 indicates that AddCell has to allocate new row.
 208
 209     // scan params:
 210     m_rBkg = m_tBkg;
 211     if (tag.HasParam(wxT("BGCOLOR")))
 212         tag.GetParamAsColour(wxT("BGCOLOR"), &m_rBkg);
 213     if (tag.HasParam(wxT("VALIGN")))
 214         m_rValign = tag.GetParam(wxT("VALIGN"));
 215     else
 216         m_rValign = m_tValign;
 217 }
 218
 219
 220
 221 void wxHtmlTableCell::AddCell(wxHtmlContainerCell *cell, const wxHtmlTag& tag)
 222 {
 223     // Is this cell in new row?
 224     // VS: we can't do it in AddRow, see my comment there
 225     if (m_ActualCol == -1)
 226     {
 227         if (m_ActualRow + 1 > m_NumRows - 1)
 228             ReallocRows(m_ActualRow + 2);
 229         m_ActualRow++;
 230     }
 231
 232     // cells & columns:
 233     do
 234     {
 235         m_ActualCol++;
 236     } while ((m_ActualCol < m_NumCols) &&
 237              (m_CellInfo[m_ActualRow][m_ActualCol].flag != cellFree));
 238
 239     if (m_ActualCol > m_NumCols - 1)
 240         ReallocCols(m_ActualCol + 1);
 241
 242     int r = m_ActualRow, c = m_ActualCol;
 243
 244     m_CellInfo[r][c].cont = cell;
 245     m_CellInfo[r][c].colspan = 1;
 246     m_CellInfo[r][c].rowspan = 1;
 247     m_CellInfo[r][c].flag = cellUsed;
 248     m_CellInfo[r][c].minheight = 0;
 249     m_CellInfo[r][c].valign = wxHTML_ALIGN_TOP;
 250
 251     /* scan for parameters: */
 252
 253     // width:
 254     {
 255         if (tag.HasParam(wxT("WIDTH")))
 256         {
 257             wxString wd = tag.GetParam(wxT("WIDTH"));
 258
 259             if (wd[wd.Length()-1] == wxT('%'))
 260             {
 261                 wxSscanf(wd.c_str(), wxT("%i%%"), &m_ColsInfo[c].width);
 262                 m_ColsInfo[c].units = wxHTML_UNITS_PERCENT;
 263             }
 264             else
 265             {
 266                 wxSscanf(wd.c_str(), wxT("%i"), &m_ColsInfo[c].width);
 267                 m_ColsInfo[c].width = (int)(m_PixelScale * (double)m_ColsInfo[c].width);
 268                 m_ColsInfo[c].units = wxHTML_UNITS_PIXELS;
 269             }
 270         }
 271     }
 272
 273
 274     // spanning:
 275     {
 276         tag.GetParamAsInt(wxT("COLSPAN"), &m_CellInfo[r][c].colspan);
 277         tag.GetParamAsInt(wxT("ROWSPAN"), &m_CellInfo[r][c].rowspan);
 278         if ((m_CellInfo[r][c].colspan != 1) || (m_CellInfo[r][c].rowspan != 1))
 279         {
 280             int i, j;
 281
 282             if (r + m_CellInfo[r][c].rowspan > m_NumRows)
 283                 ReallocRows(r + m_CellInfo[r][c].rowspan);
 284             if (c + m_CellInfo[r][c].colspan > m_NumCols)
 285                 ReallocCols(c + m_CellInfo[r][c].colspan);
 286             for (i = r; i < r + m_CellInfo[r][c].rowspan; i++)
 287                 for (j = c; j < c + m_CellInfo[r][c].colspan; j++)
 288                     m_CellInfo[i][j].flag = cellSpan;
 289             m_CellInfo[r][c].flag = cellUsed;
 290         }
 291     }
 292
 293     //background color:
 294     {
 295         wxColour bk = m_rBkg;
 296         if (tag.HasParam(wxT("BGCOLOR")))
 297             tag.GetParamAsColour(wxT("BGCOLOR"), &bk);
 298         if (bk.Ok())
 299             cell->SetBackgroundColour(bk);
 300     }
 301     if (m_HasBorders)
 302         cell->SetBorder(TABLE_BORDER_CLR_2, TABLE_BORDER_CLR_1);
 303
 304     // vertical alignment:
 305     {
 306         wxString valign;
 307         if (tag.HasParam(wxT("VALIGN")))
 308             valign = tag.GetParam(wxT("VALIGN"));
 309         else
 310             valign = m_tValign;
 311         valign.MakeUpper();
 312         if (valign == wxT("TOP"))
 313             m_CellInfo[r][c].valign = wxHTML_ALIGN_TOP;
 314         else if (valign == wxT("BOTTOM"))
 315             m_CellInfo[r][c].valign = wxHTML_ALIGN_BOTTOM;
 316         else m_CellInfo[r][c].valign = wxHTML_ALIGN_CENTER;
 317     }
 318
 319     cell->SetIndent(m_Padding, wxHTML_INDENT_ALL, wxHTML_UNITS_PIXELS);
 320 }
 321
 322
 323
 324
 325
 326 void wxHtmlTableCell::Layout(int w)
 327 {
 328     /*
 329
 330     WIDTH ADJUSTING :
 331
 332     */
 333
 334     if (m_WidthFloatUnits == wxHTML_UNITS_PERCENT)
 335     {
 336         if (m_WidthFloat < 0) m_Width = (100 + m_WidthFloat) * w / 100;
 337         else m_Width = m_WidthFloat * w / 100;
 338     }
 339     else
 340     {
 341         if (m_WidthFloat < 0) m_Width = w + m_WidthFloat;
 342         else m_Width = m_WidthFloat;
 343     }
 344
 345
 346     /*
 347
 348     LAYOUTING :
 349
 350     */
 351
 352     /* 1.  setup columns widths: */
 353     {
 354         int wpix = m_Width - (m_NumCols + 1) * m_Spacing;
 355         int i, j;
 356         int wtemp = 0;
 357
 358         // 1a. setup fixed-width columns:
 359         for (i = 0; i < m_NumCols; i++)
 360             if (m_ColsInfo[i].units == wxHTML_UNITS_PIXELS)
 361                 wpix -= (m_ColsInfo[i].pixwidth = m_ColsInfo[i].width);
 362
 363         // 1b. setup floating-width columns:
 364         for (i = 0; i < m_NumCols; i++)
 365             if ((m_ColsInfo[i].units == wxHTML_UNITS_PERCENT) && (m_ColsInfo[i].width != 0))
 366                 wtemp += (m_ColsInfo[i].pixwidth = m_ColsInfo[i].width * wpix / 100);
 367         wpix -= wtemp;
 368
 369         // 1c. setup defalut columns (no width specification supplied):
 370         // NOTE! This algorithm doesn't conform to HTML standard : it assigns equal widths
 371         // instead of optimal
 372         for (i = j = 0; i < m_NumCols; i++)
 373             if (m_ColsInfo[i].width == 0) j++;
 374         for (i = 0; i < m_NumCols; i++)
 375             if (m_ColsInfo[i].width == 0)
 376                 m_ColsInfo[i].pixwidth = wpix / j;
 377     }
 378
 379     /* 2.  compute positions of columns: */
 380     {
 381         int wpos = m_Spacing;
 382         for (int i = 0; i < m_NumCols; i++)
 383         {
 384             m_ColsInfo[i].leftpos = wpos;
 385             wpos += m_ColsInfo[i].pixwidth + m_Spacing;
 386         }
 387     }
 388
 389     /* 3.  sub-layout all cells: */
 390     {
 391         int *ypos = new int[m_NumRows + 1];
 392
 393         int actcol, actrow;
 394         int fullwid;
 395         wxHtmlContainerCell *actcell;
 396
 397         ypos[0] = m_Spacing;
 398         for (actrow = 1; actrow <= m_NumRows; actrow++) ypos[actrow] = -1;
 399         for (actrow = 0; actrow < m_NumRows; actrow++)
 400         {
 401             if (ypos[actrow] == -1) ypos[actrow] = ypos[actrow-1];
 402             // 3a. sub-layout and detect max height:
 403
 404             for (actcol = 0; actcol < m_NumCols; actcol++) {
 405                 if (m_CellInfo[actrow][actcol].flag != cellUsed) continue;
 406                 actcell = m_CellInfo[actrow][actcol].cont;
 407                 fullwid = 0;
 408                 for (int i = actcol; i < m_CellInfo[actrow][actcol].colspan + actcol; i++)
 409                     fullwid += m_ColsInfo[i].pixwidth;
 410                 fullwid += (m_CellInfo[actrow][actcol].colspan - 1) * m_Spacing;
 411                 actcell->SetMinHeight(m_CellInfo[actrow][actcol].minheight, m_CellInfo[actrow][actcol].valign);
 412                 actcell->Layout(fullwid);
 413
 414                 if (ypos[actrow] + actcell->GetHeight() + m_CellInfo[actrow][actcol].rowspan * m_Spacing > ypos[actrow + m_CellInfo[actrow][actcol].rowspan])
 415                     ypos[actrow + m_CellInfo[actrow][actcol].rowspan] =
 416                             ypos[actrow] + actcell->GetHeight() + m_CellInfo[actrow][actcol].rowspan * m_Spacing;
 417             }
 418         }
 419
 420         for (actrow = 0; actrow < m_NumRows; actrow++)
 421         {
 422             // 3b. place cells in row & let'em all have same height:
 423
 424             for (actcol = 0; actcol < m_NumCols; actcol++)
 425             {
 426                 if (m_CellInfo[actrow][actcol].flag != cellUsed) continue;
 427                 actcell = m_CellInfo[actrow][actcol].cont;
 428                 actcell->SetMinHeight(
 429                                  ypos[actrow + m_CellInfo[actrow][actcol].rowspan] - ypos[actrow] -  m_Spacing,
 430                                  m_CellInfo[actrow][actcol].valign);
 431                 fullwid = 0;
 432                 for (int i = actcol; i < m_CellInfo[actrow][actcol].colspan + actcol; i++)
 433                     fullwid += m_ColsInfo[i].pixwidth;
 434                 fullwid += (m_CellInfo[actrow][actcol].colspan - 1) * m_Spacing;
 435                 actcell->Layout(fullwid);
 436                 actcell->SetPos(m_ColsInfo[actcol].leftpos, ypos[actrow]);
 437             }
 438         }
 439         m_Height = ypos[m_NumRows];
 440         delete[] ypos;
 441     }
 442 }
 443
 444
 445
 446
 447
 448
 449 //-----------------------------------------------------------------------------
 450 // The tables handler:
 451 //-----------------------------------------------------------------------------
 452
 453
 454 TAG_HANDLER_BEGIN(TABLE, "TABLE,TR,TD,TH")
 455
 456     TAG_HANDLER_VARS
 457         wxHtmlTableCell* m_Table;
 458         wxString m_tAlign, m_rAlign;
 459         int m_OldAlign;
 460
 461     TAG_HANDLER_CONSTR(TABLE)
 462     {
 463         m_Table = NULL;
 464         m_tAlign = m_rAlign = wxEmptyString;
 465         m_OldAlign = wxHTML_ALIGN_LEFT;
 466     }
 467
 468
 469     TAG_HANDLER_PROC(tag)
 470     {
 471         wxHtmlContainerCell *c;
 472
 473         // new table started, backup upper-level table (if any) and create new:
 474         if (tag.GetName() == wxT("TABLE"))
 475         {
 476             wxHtmlTableCell *oldt = m_Table;
 477             wxHtmlContainerCell *oldcont;
 478             int m_OldAlign;
 479
 480             oldcont = c = m_WParser->OpenContainer();
 481
 482             c->SetWidthFloat(tag, m_WParser->GetPixelScale());
 483             m_Table = new wxHtmlTableCell(c, tag, m_WParser->GetPixelScale());
 484             m_OldAlign = m_WParser->GetAlign();
 485             m_tAlign = wxEmptyString;
 486             if (tag.HasParam(wxT("ALIGN")))
 487                 m_tAlign = tag.GetParam(wxT("ALIGN"));
 488
 489             ParseInner(tag);
 490
 491             m_WParser->SetAlign(m_OldAlign);
 492             m_WParser->SetContainer(oldcont);
 493             m_WParser->CloseContainer();
 494             m_Table = oldt;
 495             return TRUE;
 496         }
 497
 498
 499         else if (m_Table && !tag.IsEnding())
 500         {
 501             // new row in table
 502             if (tag.GetName() == wxT("TR"))
 503             {
 504                 m_Table->AddRow(tag);
 505                 m_rAlign = m_tAlign;
 506                 if (tag.HasParam(wxT("ALIGN")))
 507                     m_rAlign = tag.GetParam(wxT("ALIGN"));
 508             }
 509
 510             // new cell
 511             else
 512             {
 513                 m_WParser->SetAlign(m_OldAlign);
 514                 c = m_WParser->SetContainer(new wxHtmlContainerCell(m_Table));
 515                 m_Table->AddCell(c, tag);
 516
 517                 m_WParser->OpenContainer();
 518
 519                 if (tag.GetName() == wxT("TH")) /*header style*/
 520                 {
 521                     m_WParser->SetAlign(wxHTML_ALIGN_CENTER);
 522                 }
 523
 524                 {
 525                     wxString als;
 526
 527                     als = m_rAlign;
 528                     if (tag.HasParam(wxT("ALIGN")))
 529                         als = tag.GetParam(wxT("ALIGN"));
 530                     als.MakeUpper();
 531                     if (als == wxT("RIGHT"))
 532                         m_WParser->SetAlign(wxHTML_ALIGN_RIGHT);
 533                     else if (als == wxT("CENTER"))
 534                         m_WParser->SetAlign(wxHTML_ALIGN_CENTER);
 535                 }
 536                 m_WParser->OpenContainer();
 537             }
 538         }
 539         return FALSE;
 540     }
 541
 542 TAG_HANDLER_END(TABLE)
 543
 544
 545
 546
 547
 548 TAGS_MODULE_BEGIN(Tables)
 549
 550     TAGS_MODULE_ADD(TABLE)
 551
 552 TAGS_MODULE_END(Tables)
 553
 554
 555 #endif