src/html/m_tables.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        mod_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
  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 mod_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(mod_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;                      // universal
  53         int leftpos, pixwidth, maxrealwidth;   // temporary (depends on width of table)
  54     } colStruct;
  55
  56 typedef enum {
  57         cellSpan,
  58         cellUsed,
  59         cellFree
  60     } cellState;
  61
  62 typedef struct {
  63         wxHtmlContainerCell *cont;
  64         int colspan, rowspan;
  65         int minheight, valign;
  66         cellState flag;
  67     } cellStruct;
  68
  69
  70 class wxHtmlTableCell : public wxHtmlContainerCell
  71 {
  72     protected:
  73         /* These are real attributes: */
  74         bool m_HasBorders;
  75                 // should we draw borders or not?
  76         int m_NumCols, m_NumRows;
  77                 // number of columns; rows
  78         colStruct *m_ColsInfo;
  79                 // array of column information
  80         cellStruct **m_CellInfo;
  81                 // 2D array of all cells in the table : m_CellInfo[row][column]
  82         int m_Spacing;
  83                 // spaces between cells
  84         int m_Padding;
  85                 // cells internal indentation
  86
  87     private:
  88         /* ...and these are valid only during parsing of table: */
  89         int m_ActualCol, m_ActualRow;
  90                 // number of actual column (ranging from 0..m_NumCols)
  91
  92         // default values (for table and row):
  93         int m_tBkg, m_rBkg;
  94         wxString m_tValign, m_rValign;
  95
  96
  97     public:
  98         wxHtmlTableCell(wxHtmlContainerCell *parent, const wxHtmlTag& tag);
  99         ~wxHtmlTableCell();
 100         virtual void Layout(int w);
 101
 102         void AddRow(const wxHtmlTag& tag);
 103         void AddCell(wxHtmlContainerCell *cell, const wxHtmlTag& tag);
 104     private:
 105         void ReallocCols(int cols);
 106         void ReallocRows(int rows);
 107                 // reallocates memory to given number of cols/rows
 108                 // and changes m_NumCols/m_NumRows value to reflect this change
 109                 // NOTE! You CAN'T change m_NumCols/m_NumRows before calling this!!
 110 };
 111
 112
 113
 114 wxHtmlTableCell::wxHtmlTableCell(wxHtmlContainerCell *parent, const wxHtmlTag& tag)
 115  : wxHtmlContainerCell(parent)
 116 {
 117     m_HasBorders = (tag.HasParam("BORDER") && tag.GetParam("BORDER") != "0");
 118     m_ColsInfo = NULL;
 119     m_NumCols = m_NumRows = 0;
 120     m_CellInfo = NULL;
 121     m_ActualCol = m_ActualRow = -1;
 122
 123     /* scan params: */
 124     m_tBkg = m_rBkg = -1;
 125     if (tag.HasParam(wxT("BGCOLOR"))) tag.ScanParam(wxT("BGCOLOR"), wxT("#%lX"), &m_tBkg);
 126     if (tag.HasParam(wxT("VALIGN"))) m_tValign = tag.GetParam(wxT("VALIGN")); else m_tValign = wxEmptyString;
 127     if (tag.HasParam(wxT("CELLSPACING")) && tag.ScanParam(wxT("CELLSPACING"), wxT("%i"), &m_Spacing) == 1) {} else m_Spacing = 2;
 128     if (tag.HasParam(wxT("CELLPADDING")) && tag.ScanParam(wxT("CELLPADDING"), wxT("%i"), &m_Padding) == 1) {} else m_Padding = 3;
 129
 130     if (m_HasBorders)
 131         SetBorder(TABLE_BORDER_CLR_1, TABLE_BORDER_CLR_2);
 132 }
 133
 134
 135
 136 wxHtmlTableCell::~wxHtmlTableCell()
 137 {
 138     if (m_ColsInfo) free(m_ColsInfo);
 139     if (m_CellInfo) {
 140         for (int i = 0; i < m_NumRows; i++)
 141             free(m_CellInfo[i]);
 142         free(m_CellInfo);
 143     }
 144 }
 145
 146
 147
 148 void wxHtmlTableCell::ReallocCols(int cols)
 149 {
 150     int i,j;
 151
 152     for (i = 0; i < m_NumRows; i++) {
 153         m_CellInfo[i] = (cellStruct*) realloc(m_CellInfo[i], sizeof(cellStruct) * cols);
 154         for (j = m_NumCols; j < cols; j++)
 155             m_CellInfo[i][j].flag = cellFree;
 156     }
 157
 158     m_ColsInfo = (colStruct*) realloc(m_ColsInfo, sizeof(colStruct) * cols);
 159     for (j = m_NumCols; j < cols; j++) {
 160            m_ColsInfo[j].width = 0;
 161            m_ColsInfo[j].units = wxHTML_UNITS_PERCENT;
 162     }
 163
 164     m_NumCols = cols;
 165 }
 166
 167
 168
 169 void wxHtmlTableCell::ReallocRows(int rows)
 170 {
 171     m_CellInfo = (cellStruct**) realloc(m_CellInfo, sizeof(cellStruct*) * rows);
 172     for (int row = m_NumRows; row < rows ; row++)
 173     {
 174         if (m_NumCols == 0)
 175             m_CellInfo[row] = NULL;
 176         else
 177         {
 178             m_CellInfo[row] = (cellStruct*) malloc(sizeof(cellStruct) * m_NumCols);
 179             for (int col = 0; col < m_NumCols; col++)
 180                 m_CellInfo[row][col].flag = cellFree;
 181         }
 182     }
 183     m_NumRows = rows;
 184 }
 185
 186
 187 void wxHtmlTableCell::AddRow(const wxHtmlTag& tag)
 188 {
 189     if (m_ActualRow + 1 > m_NumRows - 1)
 190         ReallocRows(m_ActualRow + 2);
 191     m_ActualRow++;
 192     m_ActualCol = -1;
 193
 194     /* scan params: */
 195     m_rBkg = m_tBkg;
 196     if (tag.HasParam(wxT("BGCOLOR"))) tag.ScanParam(wxT("BGCOLOR"), wxT("#%lX"), &m_rBkg);
 197     if (tag.HasParam(wxT("VALIGN"))) m_rValign = tag.GetParam(wxT("VALIGN")); else m_rValign = m_tValign;
 198 }
 199
 200
 201
 202 void wxHtmlTableCell::AddCell(wxHtmlContainerCell *cell, const wxHtmlTag& tag)
 203 {
 204     do {
 205         m_ActualCol++;
 206     } while ((m_ActualCol < m_NumCols) && (m_CellInfo[m_ActualRow][m_ActualCol].flag != cellFree));
 207     if (m_ActualCol > m_NumCols - 1)
 208         ReallocCols(m_ActualCol + 1);
 209
 210     int r = m_ActualRow, c = m_ActualCol;
 211
 212     m_CellInfo[r][c].cont = cell;
 213     m_CellInfo[r][c].colspan = 1;
 214     m_CellInfo[r][c].rowspan = 1;
 215     m_CellInfo[r][c].flag = cellUsed;
 216     m_CellInfo[r][c].minheight = 0;
 217     m_CellInfo[r][c].valign = wxHTML_ALIGN_TOP;
 218
 219     /* scan for parameters: */
 220
 221     // width:
 222     {
 223         if (tag.HasParam("WIDTH")) {
 224             wxString wd = tag.GetParam("WIDTH");
 225
 226             if (wd[wd.Length()-1] == '%') {
 227                 wxSscanf(wd.c_str(), wxT("%i%%"), &m_ColsInfo[c].width);
 228                 m_ColsInfo[c].units = wxHTML_UNITS_PERCENT;
 229             }
 230             else {
 231                 wxSscanf(wd.c_str(), wxT("%i"), &m_ColsInfo[c].width);
 232                 m_ColsInfo[c].units = wxHTML_UNITS_PIXELS;
 233             }
 234         }
 235     }
 236
 237
 238     // spanning:
 239     {
 240         if (tag.HasParam(wxT("COLSPAN"))) tag.ScanParam(wxT("COLSPAN"), wxT("%i"), &m_CellInfo[r][c].colspan);
 241         if (tag.HasParam(wxT("ROWSPAN"))) tag.ScanParam(wxT("ROWSPAN"), wxT("%i"), &m_CellInfo[r][c].rowspan);
 242         if ((m_CellInfo[r][c].colspan != 1) || (m_CellInfo[r][c].rowspan != 1)) {
 243             int i, j;
 244
 245             if (r + m_CellInfo[r][c].rowspan > m_NumRows) ReallocRows(r + m_CellInfo[r][c].rowspan);
 246             if (c + m_CellInfo[r][c].colspan > m_NumCols) ReallocCols(c + m_CellInfo[r][c].colspan);
 247             for (i = r; i < r + m_CellInfo[r][c].rowspan; i++)
 248                 for (j = c; j < c + m_CellInfo[r][c].colspan; j++)
 249                     m_CellInfo[i][j].flag = cellSpan;
 250             m_CellInfo[r][c].flag = cellUsed;
 251         }
 252     }
 253
 254     //background color:
 255     {
 256         int bk = m_rBkg;
 257         if (tag.HasParam(wxT("BGCOLOR"))) tag.ScanParam(wxT("BGCOLOR"), wxT("#%lX"), &bk);
 258         if (bk != -1) {
 259             wxColour clr = wxColour((bk & 0xFF0000) >> 16 , (bk & 0x00FF00) >> 8, (bk & 0x0000FF));
 260             cell -> SetBackgroundColour(clr);
 261         }
 262     }
 263     if (m_HasBorders)
 264         cell -> SetBorder(TABLE_BORDER_CLR_2, TABLE_BORDER_CLR_1);
 265
 266     // vertical alignment:
 267     {
 268         wxString valign;
 269         if (tag.HasParam("VALIGN")) valign = tag.GetParam("VALIGN"); else valign = m_tValign;
 270         valign.MakeUpper();
 271         if (valign == "TOP") m_CellInfo[r][c].valign = wxHTML_ALIGN_TOP;
 272         else if (valign == "BOTTOM") m_CellInfo[r][c].valign = wxHTML_ALIGN_BOTTOM;
 273         else m_CellInfo[r][c].valign = wxHTML_ALIGN_CENTER;
 274     }
 275
 276     cell -> SetIndent(m_Padding, wxHTML_INDENT_ALL, wxHTML_UNITS_PIXELS);
 277 }
 278
 279
 280
 281
 282
 283 void wxHtmlTableCell::Layout(int w)
 284 {
 285     /*
 286
 287     WIDTH ADJUSTING :
 288
 289     */
 290
 291     if (m_WidthFloatUnits == wxHTML_UNITS_PERCENT) {
 292         if (m_WidthFloat < 0) m_Width = (100 + m_WidthFloat) * w / 100;
 293         else m_Width = m_WidthFloat * w / 100;
 294     }
 295     else {
 296         if (m_WidthFloat < 0) m_Width = w + m_WidthFloat;
 297         else m_Width = m_WidthFloat;
 298     }
 299
 300
 301     /*
 302
 303     LAYOUTING :
 304
 305     */
 306
 307     /* 1.  setup columns widths: */
 308     {
 309         int wpix = m_Width - (m_NumCols + 1) * m_Spacing;
 310         int i, j;
 311         int wtemp = 0;
 312
 313         // 1a. setup fixed-width columns:
 314         for (i = 0; i < m_NumCols; i++)
 315             if (m_ColsInfo[i].units == wxHTML_UNITS_PIXELS)
 316                 wpix -= (m_ColsInfo[i].pixwidth = m_ColsInfo[i].width);
 317
 318         // 1b. setup floating-width columns:
 319         for (i = 0; i < m_NumCols; i++)
 320             if ((m_ColsInfo[i].units == wxHTML_UNITS_PERCENT) && (m_ColsInfo[i].width != 0))
 321                 wtemp += (m_ColsInfo[i].pixwidth = m_ColsInfo[i].width * wpix / 100);
 322         wpix -= wtemp;
 323
 324         // 1c. setup defalut columns (no width specification supplied):
 325         // NOTE! This algorithm doesn't conform to HTML standard : it assigns equal widths
 326         // instead of optimal
 327         for (i = j = 0; i < m_NumCols; i++)
 328             if (m_ColsInfo[i].width == 0) j++;
 329         for (i = 0; i < m_NumCols; i++)
 330             if (m_ColsInfo[i].width == 0)
 331                 m_ColsInfo[i].pixwidth = wpix / j;
 332     }
 333
 334     /* 2.  compute positions of columns: */
 335     {
 336         int wpos = m_Spacing;
 337         for (int i = 0; i < m_NumCols; i++) {
 338             m_ColsInfo[i].leftpos = wpos;
 339             wpos += m_ColsInfo[i].pixwidth + m_Spacing;
 340         }
 341     }
 342
 343     /* 3.  sub-layout all cells: */
 344     {
 345         int *ypos = new int[m_NumRows + 1];
 346
 347         int actcol, actrow;
 348         int fullwid;
 349         wxHtmlContainerCell *actcell;
 350
 351         for (actrow = 0; actrow <= m_NumRows; actrow++) ypos[actrow] = m_Spacing;
 352
 353         for (actrow = 0; actrow < m_NumRows; actrow++) {
 354
 355             // 3a. sub-layout and detect max height:
 356
 357             for (actcol = 0; actcol < m_NumCols; actcol++) {
 358                 if (m_CellInfo[actrow][actcol].flag != cellUsed) continue;
 359                 actcell = m_CellInfo[actrow][actcol].cont;
 360                 fullwid = 0;
 361                 for (int i = actcol; i < m_CellInfo[actrow][actcol].colspan + actcol; i++)
 362                     fullwid += m_ColsInfo[i].pixwidth;
 363                 actcell -> SetMinHeight(m_CellInfo[actrow][actcol].minheight, m_CellInfo[actrow][actcol].valign);
 364                 actcell -> Layout(fullwid);
 365
 366                 if (ypos[actrow] + actcell -> GetHeight() + m_CellInfo[actrow][actcol].rowspan * m_Spacing > ypos[actrow + m_CellInfo[actrow][actcol].rowspan])
 367                     ypos[actrow + m_CellInfo[actrow][actcol].rowspan] =
 368                             ypos[actrow] + actcell -> GetHeight() + m_CellInfo[actrow][actcol].rowspan * m_Spacing;
 369             }
 370         }
 371
 372
 373         for (actrow = 0; actrow < m_NumRows; actrow++) {
 374
 375             // 3b. place cells in row & let'em all have same height:
 376
 377             for (actcol = 0; actcol < m_NumCols; actcol++) {
 378                 if (m_CellInfo[actrow][actcol].flag != cellUsed) continue;
 379                 actcell = m_CellInfo[actrow][actcol].cont;
 380                 actcell -> SetMinHeight(
 381                                  ypos[actrow + m_CellInfo[actrow][actcol].rowspan] - ypos[actrow] - m_CellInfo[actrow][actcol].rowspan * m_Spacing,
 382                                  m_CellInfo[actrow][actcol].valign);
 383                 fullwid = 0;
 384                 for (int i = actcol; i < m_CellInfo[actrow][actcol].colspan + actcol; i++)
 385                     fullwid += m_ColsInfo[i].pixwidth;
 386                 actcell -> Layout(fullwid);
 387                 actcell -> SetPos(m_ColsInfo[actcol].leftpos, ypos[actrow]);
 388             }
 389
 390         }
 391         m_Height = ypos[m_NumRows];
 392         delete[] ypos;
 393     }
 394 }
 395
 396
 397
 398
 399
 400
 401 //-----------------------------------------------------------------------------
 402 // The tables handler:
 403 //-----------------------------------------------------------------------------
 404
 405
 406 TAG_HANDLER_BEGIN(TABLE, "TABLE,TR,TD,TH")
 407
 408     TAG_HANDLER_VARS
 409         wxHtmlTableCell* m_Table;
 410         wxString m_tAlign, m_rAlign;
 411         int m_OldAlign;
 412
 413     TAG_HANDLER_CONSTR(TABLE)
 414     {
 415         m_Table = NULL;
 416         m_tAlign = m_rAlign = wxEmptyString;
 417         m_OldAlign = wxHTML_ALIGN_LEFT;
 418     }
 419
 420
 421     TAG_HANDLER_PROC(tag)
 422     {
 423         wxHtmlContainerCell *c;
 424
 425         // new table started, backup upper-level table (if any) and create new:
 426         if (tag.GetName() == "TABLE") {
 427             wxHtmlTableCell *oldt = m_Table;
 428             wxHtmlContainerCell *oldcont;
 429             int m_OldAlign;
 430
 431             oldcont = c = m_WParser -> OpenContainer();
 432
 433             c -> SetWidthFloat(tag);
 434             m_Table = new wxHtmlTableCell(c, tag);
 435             m_OldAlign = m_WParser -> GetAlign();
 436             m_tAlign = wxEmptyString;
 437             if (tag.HasParam("ALIGN")) m_tAlign = tag.GetParam("ALIGN");
 438
 439             ParseInner(tag);
 440
 441             m_WParser -> SetAlign(m_OldAlign);
 442             m_WParser -> SetContainer(oldcont);
 443             m_WParser -> CloseContainer();
 444             m_Table = oldt;
 445             return TRUE;
 446         }
 447
 448
 449         else if (m_Table && !tag.IsEnding()) {
 450             // new row in table
 451             if (tag.GetName() == "TR") {
 452                 m_Table -> AddRow(tag);
 453                 m_rAlign = m_tAlign;
 454                 if (tag.HasParam("ALIGN")) m_rAlign = tag.GetParam("ALIGN");
 455             }
 456
 457             // new cell
 458             else {
 459                 m_WParser -> SetAlign(m_OldAlign);
 460                 c = m_WParser -> SetContainer(new wxHtmlContainerCell(m_Table));
 461                 m_Table -> AddCell(c, tag);
 462
 463                 m_WParser -> OpenContainer();
 464
 465                 if (tag.GetName() == "TH") /*header style*/ {
 466                     m_WParser -> SetAlign(wxHTML_ALIGN_CENTER);
 467                 }
 468
 469                 {
 470                     wxString als;
 471
 472                     als = m_rAlign;
 473                     if (tag.HasParam("ALIGN")) als = tag.GetParam("ALIGN");
 474                     als.MakeUpper();
 475                     if (als == "RIGHT") m_WParser -> SetAlign(wxHTML_ALIGN_RIGHT);
 476                     else if (als == "CENTER") m_WParser -> SetAlign(wxHTML_ALIGN_CENTER);
 477                 }
 478                 m_WParser -> OpenContainer();
 479             }
 480         }
 481         return FALSE;
 482     }
 483
 484 TAG_HANDLER_END(TABLE)
 485
 486
 487
 488
 489
 490 TAGS_MODULE_BEGIN(Tables)
 491
 492     TAGS_MODULE_ADD(TABLE)
 493
 494 TAGS_MODULE_END(Tables)
 495
 496
 497 #endif