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