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("BGCOLOR")) tag.ScanParam("BGCOLOR", "#%lX", &m_tBkg);
 126     if (tag.HasParam("VALIGN")) m_tValign = tag.GetParam("VALIGN"); else m_tValign = wxEmptyString;
 127     if (tag.HasParam("CELLSPACING") && tag.ScanParam("CELLSPACING", "%i", &m_Spacing) == 1) {} else m_Spacing = 2;
 128     if (tag.HasParam("CELLPADDING") && tag.ScanParam("CELLPADDING", "%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     if (m_NumCols != 0) {
 173         int x = rows - 1;
 174         m_CellInfo[x] = (cellStruct*) malloc(sizeof(cellStruct) * m_NumCols);
 175         for (int i = 0; i < m_NumCols; i++)
 176             m_CellInfo[x][i].flag = cellFree;
 177     }
 178     else
 179         m_CellInfo[rows - 1] = NULL;
 180     m_NumRows = rows;
 181 }
 182
 183
 184
 185 void wxHtmlTableCell::AddRow(const wxHtmlTag& tag)
 186 {
 187     if (m_ActualRow + 1 > m_NumRows - 1)
 188         ReallocRows(m_ActualRow + 2);
 189     m_ActualRow++;
 190     m_ActualCol = -1;
 191
 192     /* scan params: */
 193     m_rBkg = m_tBkg;
 194     if (tag.HasParam("BGCOLOR")) tag.ScanParam("BGCOLOR", "#%lX", &m_rBkg);
 195     if (tag.HasParam("VALIGN")) m_rValign = tag.GetParam("VALIGN"); else m_rValign = m_tValign;
 196 }
 197
 198
 199
 200 void wxHtmlTableCell::AddCell(wxHtmlContainerCell *cell, const wxHtmlTag& tag)
 201 {
 202     do {
 203         m_ActualCol++;
 204     } while ((m_ActualCol < m_NumCols) && (m_CellInfo[m_ActualRow][m_ActualCol].flag != cellFree));
 205     if (m_ActualCol > m_NumCols - 1)
 206         ReallocCols(m_ActualCol + 1);
 207
 208     int r = m_ActualRow, c = m_ActualCol;
 209
 210     m_CellInfo[r][c].cont = cell;
 211     m_CellInfo[r][c].colspan = 1;
 212     m_CellInfo[r][c].rowspan = 1;
 213     m_CellInfo[r][c].flag = cellUsed;
 214     m_CellInfo[r][c].minheight = 0;
 215     m_CellInfo[r][c].valign = wxHTML_ALIGN_TOP;
 216
 217     /* scan for parameters: */
 218
 219     // width:
 220     {
 221         if (tag.HasParam("WIDTH")) {
 222             wxString wd = tag.GetParam("WIDTH");
 223
 224             if (wd[wd.Length()-1] == '%') {
 225                 sscanf(wd.c_str(), "%i%%", &m_ColsInfo[c].width);
 226                 m_ColsInfo[c].units = wxHTML_UNITS_PERCENT;
 227             }
 228             else {
 229                 sscanf(wd.c_str(), "%i", &m_ColsInfo[c].width);
 230                 m_ColsInfo[c].units = wxHTML_UNITS_PIXELS;
 231             }
 232         }
 233     }
 234
 235
 236     // spanning:
 237     {
 238         if (tag.HasParam("COLSPAN")) tag.ScanParam("COLSPAN", "%i", &m_CellInfo[r][c].colspan);
 239         if (tag.HasParam("ROWSPAN")) tag.ScanParam("ROWSPAN", "%i", &m_CellInfo[r][c].rowspan);
 240         if ((m_CellInfo[r][c].colspan != 1) || (m_CellInfo[r][c].rowspan != 1)) {
 241             int i, j;
 242
 243             if (r + m_CellInfo[r][c].rowspan > m_NumRows) ReallocRows(r + m_CellInfo[r][c].rowspan);
 244             if (c + m_CellInfo[r][c].colspan > m_NumCols) ReallocCols(c + m_CellInfo[r][c].colspan);
 245             for (i = r; i < r + m_CellInfo[r][c].rowspan; i++)
 246                 for (j = c; j < c + m_CellInfo[r][c].colspan; j++)
 247                     m_CellInfo[i][j].flag = cellSpan;
 248             m_CellInfo[r][c].flag = cellUsed;
 249         }
 250     }
 251
 252     //background color:
 253     {
 254         int bk = m_rBkg;
 255         if (tag.HasParam("BGCOLOR")) tag.ScanParam("BGCOLOR", "#%lX", &bk);
 256         if (bk != -1) {
 257             wxColour clr = wxColour((bk & 0xFF0000) >> 16 , (bk & 0x00FF00) >> 8, (bk & 0x0000FF));
 258             cell -> SetBackgroundColour(clr);
 259         }
 260     }
 261     if (m_HasBorders)
 262         cell -> SetBorder(TABLE_BORDER_CLR_2, TABLE_BORDER_CLR_1);
 263
 264     // vertical alignment:
 265     {
 266         wxString valign;
 267         if (tag.HasParam("VALIGN")) valign = tag.GetParam("VALIGN"); else valign = m_tValign;
 268         valign.MakeUpper();
 269         if (valign == "TOP") m_CellInfo[r][c].valign = wxHTML_ALIGN_TOP;
 270         else if (valign == "BOTTOM") m_CellInfo[r][c].valign = wxHTML_ALIGN_BOTTOM;
 271         else m_CellInfo[r][c].valign = wxHTML_ALIGN_CENTER;
 272     }
 273
 274     cell -> SetIndent(m_Padding, wxHTML_INDENT_ALL, wxHTML_UNITS_PIXELS);
 275 }
 276
 277
 278
 279
 280
 281 void wxHtmlTableCell::Layout(int w)
 282 {
 283     /*
 284
 285     WIDTH ADJUSTING :
 286
 287     */
 288
 289     if (m_WidthFloatUnits == wxHTML_UNITS_PERCENT) {
 290         if (m_WidthFloat < 0) m_Width = (100 + m_WidthFloat) * w / 100;
 291         else m_Width = m_WidthFloat * w / 100;
 292     }
 293     else {
 294         if (m_WidthFloat < 0) m_Width = w + m_WidthFloat;
 295         else m_Width = m_WidthFloat;
 296     }
 297
 298
 299     /*
 300
 301     LAYOUTING :
 302
 303     */
 304
 305     /* 1.  setup columns widths: */
 306     {
 307         int wpix = m_Width - (m_NumCols + 1) * m_Spacing;
 308         int i, j;
 309         int wtemp = 0;
 310
 311         // 1a. setup fixed-width columns:
 312         for (i = 0; i < m_NumCols; i++)
 313             if (m_ColsInfo[i].units == wxHTML_UNITS_PIXELS)
 314                 wpix -= (m_ColsInfo[i].pixwidth = m_ColsInfo[i].width);
 315
 316         // 1b. setup floating-width columns:
 317         for (i = 0; i < m_NumCols; i++)
 318             if ((m_ColsInfo[i].units == wxHTML_UNITS_PERCENT) && (m_ColsInfo[i].width != 0))
 319                 wtemp += (m_ColsInfo[i].pixwidth = m_ColsInfo[i].width * wpix / 100);
 320         wpix -= wtemp;
 321
 322         // 1c. setup defalut columns (no width specification supplied):
 323         // NOTE! This algorithm doesn't conform to HTML standard : it assigns equal widths
 324         // instead of optimal
 325         for (i = j = 0; i < m_NumCols; i++)
 326             if (m_ColsInfo[i].width == 0) j++;
 327         for (i = 0; i < m_NumCols; i++)
 328             if (m_ColsInfo[i].width == 0)
 329                 m_ColsInfo[i].pixwidth = wpix / j;
 330     }
 331
 332     /* 2.  compute positions of columns: */
 333     {
 334         int wpos = m_Spacing;
 335         for (int i = 0; i < m_NumCols; i++) {
 336             m_ColsInfo[i].leftpos = wpos;
 337             wpos += m_ColsInfo[i].pixwidth + m_Spacing;
 338         }
 339     }
 340
 341     /* 3.  sub-layout all cells: */
 342     {
 343         int *ypos = new int[m_NumRows + 1];
 344
 345         int actcol, actrow;
 346         int fullwid;
 347         wxHtmlContainerCell *actcell;
 348
 349         for (actrow = 0; actrow <= m_NumRows; actrow++) ypos[actrow] = m_Spacing;
 350
 351         for (actrow = 0; actrow < m_NumRows; actrow++) {
 352
 353             // 3a. sub-layout and detect max height:
 354
 355             for (actcol = 0; actcol < m_NumCols; actcol++) {
 356                 if (m_CellInfo[actrow][actcol].flag != cellUsed) continue;
 357                 actcell = m_CellInfo[actrow][actcol].cont;
 358                 fullwid = 0;
 359                 for (int i = actcol; i < m_CellInfo[actrow][actcol].colspan + actcol; i++)
 360                     fullwid += m_ColsInfo[i].pixwidth;
 361                 actcell -> SetMinHeight(m_CellInfo[actrow][actcol].minheight, m_CellInfo[actrow][actcol].valign);
 362                 actcell -> Layout(fullwid);
 363
 364                 if (ypos[actrow] + actcell -> GetHeight() + m_CellInfo[actrow][actcol].rowspan * m_Spacing > ypos[actrow + m_CellInfo[actrow][actcol].rowspan])
 365                     ypos[actrow + m_CellInfo[actrow][actcol].rowspan] =
 366                             ypos[actrow] + actcell -> GetHeight() + m_CellInfo[actrow][actcol].rowspan * m_Spacing;
 367             }
 368         }
 369
 370
 371         for (actrow = 0; actrow < m_NumRows; actrow++) {
 372
 373             // 3b. place cells in row & let'em all have same height:
 374
 375             for (actcol = 0; actcol < m_NumCols; actcol++) {
 376                 if (m_CellInfo[actrow][actcol].flag != cellUsed) continue;
 377                 actcell = m_CellInfo[actrow][actcol].cont;
 378                 actcell -> SetMinHeight(
 379                                  ypos[actrow + m_CellInfo[actrow][actcol].rowspan] - ypos[actrow] - m_CellInfo[actrow][actcol].rowspan * m_Spacing,
 380                                  m_CellInfo[actrow][actcol].valign);
 381                 fullwid = 0;
 382                 for (int i = actcol; i < m_CellInfo[actrow][actcol].colspan + actcol; i++)
 383                     fullwid += m_ColsInfo[i].pixwidth;
 384                 actcell -> Layout(fullwid);
 385                 actcell -> SetPos(m_ColsInfo[actcol].leftpos, ypos[actrow]);
 386             }
 387
 388         }
 389         m_Height = ypos[m_NumRows];
 390         delete[] ypos;
 391     }
 392 }
 393
 394
 395
 396
 397
 398
 399 //-----------------------------------------------------------------------------
 400 // The tables handler:
 401 //-----------------------------------------------------------------------------
 402
 403
 404 TAG_HANDLER_BEGIN(TABLE, "TABLE,TR,TD,TH")
 405
 406     TAG_HANDLER_VARS
 407         wxHtmlTableCell* m_Table;
 408         wxString m_tAlign, m_rAlign;
 409         int m_OldAlign;
 410
 411     TAG_HANDLER_CONSTR(TABLE)
 412     {
 413         m_Table = NULL;
 414     m_tAlign = m_rAlign = wxEmptyString;
 415     m_OldAlign = wxHTML_ALIGN_LEFT;
 416     }
 417
 418
 419     TAG_HANDLER_PROC(tag)
 420     {
 421         wxHtmlContainerCell *c;
 422
 423         // new table started, backup upper-level table (if any) and create new:
 424         if (tag.GetName() == "TABLE") {
 425             wxHtmlTableCell *oldt = m_Table;
 426             wxHtmlContainerCell *oldcont;
 427             int m_OldAlign;
 428
 429             oldcont = c = m_WParser -> OpenContainer();
 430
 431             c -> SetWidthFloat(tag);
 432             m_Table = new wxHtmlTableCell(c, tag);
 433             m_OldAlign = m_WParser -> GetAlign();
 434             m_tAlign = wxEmptyString;
 435             if (tag.HasParam("ALIGN")) m_tAlign = tag.GetParam("ALIGN");
 436
 437             ParseInner(tag);
 438
 439             m_WParser -> SetAlign(m_OldAlign);
 440             m_WParser -> SetContainer(oldcont);
 441             m_WParser -> CloseContainer();
 442             m_Table = oldt;
 443             return TRUE;
 444         }
 445
 446
 447         else if (m_Table && !tag.IsEnding()) {
 448             // new row in table
 449             if (tag.GetName() == "TR") {
 450                 m_Table -> AddRow(tag);
 451                 m_rAlign = m_tAlign;
 452                 if (tag.HasParam("ALIGN")) m_rAlign = tag.GetParam("ALIGN");
 453             }
 454
 455             // new cell
 456             else {
 457                 m_WParser -> SetAlign(m_OldAlign);
 458                 c = m_WParser -> SetContainer(new wxHtmlContainerCell(m_Table));
 459                 m_Table -> AddCell(c, tag);
 460
 461                 m_WParser -> OpenContainer();
 462
 463                 if (tag.GetName() == "TH") /*header style*/ {
 464                     m_WParser -> SetAlign(wxHTML_ALIGN_CENTER);
 465                 }
 466
 467                 {
 468                     wxString als;
 469
 470                     als = m_rAlign;
 471                     if (tag.HasParam("ALIGN")) als = tag.GetParam("ALIGN");
 472                     als.MakeUpper();
 473                     if (als == "RIGHT") m_WParser -> SetAlign(wxHTML_ALIGN_RIGHT);
 474                     else if (als == "CENTER") m_WParser -> SetAlign(wxHTML_ALIGN_CENTER);
 475                 }
 476                 m_WParser -> OpenContainer();
 477             }
 478         }
 479         return FALSE;
 480     }
 481
 482 TAG_HANDLER_END(TABLE)
 483
 484
 485
 486
 487
 488 TAGS_MODULE_BEGIN(Tables)
 489
 490     TAGS_MODULE_ADD(TABLE)
 491
 492 TAGS_MODULE_END(Tables)
 493
 494
 495 #endif