src/html/mod_tables.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        mod_tables.cpp
   3 // Purpose:     wxHtml module for tables
   4 // Author:      Vaclav Slavik
   5 // Copyright:   (c) 1999 Vaclav Slavik
   6 // Licence:     wxWindows Licence
   7 /////////////////////////////////////////////////////////////////////////////
   8
   9 #ifdef __GNUG__
  10 #pragma implementation
  11 #endif
  12
  13 #include <wx/wxprec.h>
  14
  15 #if wxUSE_HTML
  16 #ifdef __BORDLANDC__
  17 #pragma hdrstop
  18 #endif
  19
  20 #ifndef WXPRECOMP
  21 #include <wx/wx.h>
  22 #endif
  23
  24
  25 /*
  26 REMARKS:
  27     1. This version of mod_tables doesn't support auto-layout algorithm.
  28        This means that all columns are of same width unless explicitly specified.
  29 */
  30
  31
  32 #include <wx/html/forcelink.h>
  33 #include <wx/html/mod_templ.h>
  34
  35 #include <wx/html/htmlcell.h>
  36
  37 FORCE_LINK_ME(mod_tables)
  38
  39
  40 #define TABLE_BORDER_CLR_1  wxColour(0xC5, 0xC2, 0xC5)
  41 #define TABLE_BORDER_CLR_2  wxColour(0x62, 0x61, 0x62)
  42
  43
  44 //-----------------------------------------------------------------------------
  45 // wxHtmlTableCell
  46 //-----------------------------------------------------------------------------
  47
  48
  49 typedef struct {
  50         int width, units;                      // universal
  51         int leftpos, pixwidth, maxrealwidth;   // temporary (depends on width of table)
  52     } colStruct;
  53
  54 typedef enum {
  55         cellSpan,
  56         cellUsed,
  57         cellFree
  58     } cellState;
  59
  60 typedef struct {
  61         wxHtmlContainerCell *cont;
  62         int colspan, rowspan;
  63         int minheight, valign;
  64         cellState flag;
  65     } cellStruct;
  66
  67
  68 class wxHtmlTableCell : public wxHtmlContainerCell
  69 {
  70     protected:
  71         /* These are real attributes: */
  72         bool m_HasBorders;
  73                 // should we draw borders or not?
  74         int m_NumCols, m_NumRows;
  75                 // number of columns; rows
  76         colStruct *m_ColsInfo;
  77                 // array of column information
  78         cellStruct **m_CellInfo;
  79                 // 2D array of all cells in the table : m_CellInfo[row][column]
  80         int m_Spacing;
  81                 // spaces between cells
  82         int m_Padding;
  83                 // cells internal indentation
  84
  85     private:
  86         /* ...and these are valid only during parsing of table: */
  87         int m_ActualCol, m_ActualRow;
  88                 // number of actual column (ranging from 0..m_NumCols)
  89
  90         // default values (for table and row):
  91         int m_tBkg, m_rBkg;
  92         wxString m_tValign, m_rValign;
  93
  94
  95     public:
  96         wxHtmlTableCell(wxHtmlContainerCell *parent, const wxHtmlTag& tag);
  97         ~wxHtmlTableCell();
  98         virtual void Layout(int w);
  99
 100         void AddRow(const wxHtmlTag& tag);
 101         void AddCell(wxHtmlContainerCell *cell, const wxHtmlTag& tag);
 102     private:
 103         void ReallocCols(int cols);
 104         void ReallocRows(int rows);
 105                 // reallocates memory to given number of cols/rows
 106                 // and changes m_NumCols/m_NumRows value to reflect this change
 107                 // NOTE! You CAN'T change m_NumCols/m_NumRows before calling this!!
 108 };
 109
 110
 111
 112 wxHtmlTableCell::wxHtmlTableCell(wxHtmlContainerCell *parent, const wxHtmlTag& tag)
 113  : wxHtmlContainerCell(parent)
 114 {
 115     m_HasBorders = tag.HasParam("BORDER");
 116     m_ColsInfo = NULL;
 117     m_NumCols = m_NumRows = 0;
 118     m_CellInfo = NULL;
 119     m_ActualCol = m_ActualRow = -1;
 120
 121     /* scan params: */
 122     m_tBkg = m_rBkg = -1;
 123     if (tag.HasParam("BGCOLOR")) tag.ScanParam("BGCOLOR", "#%lX", &m_tBkg);
 124     if (tag.HasParam("VALIGN")) m_tValign = tag.GetParam("VALIGN"); else m_tValign = wxEmptyString;
 125     if (tag.HasParam("CELLSPACING")) tag.ScanParam("CELLSPACING", "%i", &m_Spacing); else m_Spacing = 2;
 126     if (tag.HasParam("CELLPADDING")) tag.ScanParam("CELLPADDING", "%i", &m_Padding); else m_Padding = 3;
 127
 128     if (m_HasBorders)
 129         SetBorder(TABLE_BORDER_CLR_1, TABLE_BORDER_CLR_2);
 130 }
 131
 132
 133
 134 wxHtmlTableCell::~wxHtmlTableCell()
 135 {
 136     if (m_ColsInfo) free(m_ColsInfo);
 137     if (m_CellInfo) {
 138         for (int i = 0; i < m_NumRows; i++)
 139             free(m_CellInfo[i]);
 140         free(m_CellInfo);
 141     }
 142 }
 143
 144
 145
 146 void wxHtmlTableCell::ReallocCols(int cols)
 147 {
 148     int i,j;
 149
 150     for (i = 0; i < m_NumRows; i++) {
 151         m_CellInfo[i] = (cellStruct*) realloc(m_CellInfo[i], sizeof(cellStruct) * cols);
 152         for (j = m_NumCols; j < cols; j++)
 153             m_CellInfo[i][j].flag = cellFree;
 154     }
 155
 156     m_ColsInfo = (colStruct*) realloc(m_ColsInfo, sizeof(colStruct) * cols);
 157     for (j = m_NumCols; j < cols; j++) {
 158            m_ColsInfo[j].width = 0;
 159            m_ColsInfo[j].units = HTML_UNITS_PERCENT;
 160     }
 161
 162     m_NumCols = cols;
 163 }
 164
 165
 166
 167 void wxHtmlTableCell::ReallocRows(int rows)
 168 {
 169     m_CellInfo = (cellStruct**) realloc(m_CellInfo, sizeof(cellStruct*) * rows);
 170     if (m_NumCols != 0) {
 171         int x = rows - 1;
 172         m_CellInfo[x] = (cellStruct*) malloc(sizeof(cellStruct) * m_NumCols);
 173         for (int i = 0; i < m_NumCols; i++)
 174             m_CellInfo[x][i].flag = cellFree;
 175     }
 176     else
 177         m_CellInfo[rows - 1] = NULL;
 178     m_NumRows = rows;
 179 }
 180
 181
 182
 183 void wxHtmlTableCell::AddRow(const wxHtmlTag& tag)
 184 {
 185     if (m_ActualRow + 1 > m_NumRows - 1)
 186         ReallocRows(m_ActualRow + 2);
 187     m_ActualRow++;
 188     m_ActualCol = -1;
 189
 190     /* scan params: */
 191     m_rBkg = m_tBkg;
 192     if (tag.HasParam("BGCOLOR")) tag.ScanParam("BGCOLOR", "#%lX", &m_rBkg);
 193     if (tag.HasParam("VALIGN")) m_rValign = tag.GetParam("VALIGN"); else m_rValign = m_tValign;
 194 }
 195
 196
 197
 198 void wxHtmlTableCell::AddCell(wxHtmlContainerCell *cell, const wxHtmlTag& tag)
 199 {
 200     do {
 201         m_ActualCol++;
 202     } while ((m_ActualCol < m_NumCols) && (m_CellInfo[m_ActualRow][m_ActualCol].flag != cellFree));
 203     if (m_ActualCol > m_NumCols - 1)
 204         ReallocCols(m_ActualCol + 1);
 205
 206     int r = m_ActualRow, c = m_ActualCol;
 207
 208     m_CellInfo[r][c].cont = cell;
 209     m_CellInfo[r][c].colspan = 1;
 210     m_CellInfo[r][c].rowspan = 1;
 211     m_CellInfo[r][c].flag = cellUsed;
 212     m_CellInfo[r][c].minheight = 0;
 213     m_CellInfo[r][c].valign = HTML_ALIGN_TOP;
 214
 215     /* scan for parameters: */
 216
 217     // width:
 218     {
 219         if (tag.HasParam("WIDTH")) {
 220             wxString wd = tag.GetParam("WIDTH");
 221
 222             if (wd[wd.Length()-1] == '%') {
 223                 sscanf(wd.c_str(), "%i%%", &m_ColsInfo[c].width);
 224                 m_ColsInfo[c].units = HTML_UNITS_PERCENT;
 225             }
 226             else {
 227                 sscanf(wd.c_str(), "%i", &m_ColsInfo[c].width);
 228                 m_ColsInfo[c].units = HTML_UNITS_PIXELS;
 229             }
 230         }
 231     }
 232
 233
 234     // spanning:
 235     {
 236         if (tag.HasParam("COLSPAN")) tag.ScanParam("COLSPAN", "%i", &m_CellInfo[r][c].colspan);
 237         if (tag.HasParam("ROWSPAN")) tag.ScanParam("ROWSPAN", "%i", &m_CellInfo[r][c].rowspan);
 238         if ((m_CellInfo[r][c].colspan != 1) || (m_CellInfo[r][c].rowspan != 1)) {
 239             int i, j;
 240
 241             if (r + m_CellInfo[r][c].rowspan > m_NumRows) ReallocRows(r + m_CellInfo[r][c].rowspan);
 242             if (c + m_CellInfo[r][c].colspan > m_NumCols) ReallocCols(c + m_CellInfo[r][c].colspan);
 243             for (i = r; i < r + m_CellInfo[r][c].rowspan; i++)
 244                 for (j = c; j < c + m_CellInfo[r][c].colspan; j++)
 245                     m_CellInfo[i][j].flag = cellSpan;
 246             m_CellInfo[r][c].flag = cellUsed;
 247         }
 248     }
 249
 250     //background color:
 251     {
 252         int bk = m_rBkg;
 253         if (tag.HasParam("BGCOLOR")) tag.ScanParam("BGCOLOR", "#%lX", &bk);
 254         if (bk != -1) {
 255             wxColour clr = wxColour((bk & 0xFF0000) >> 16 , (bk & 0x00FF00) >> 8, (bk & 0x0000FF));
 256             cell -> SetBackgroundColour(clr);
 257         }
 258     }
 259     if (m_HasBorders)
 260         cell -> SetBorder(TABLE_BORDER_CLR_2, TABLE_BORDER_CLR_1);
 261
 262     // vertical alignment:
 263     {
 264         wxString valign;
 265         if (tag.HasParam("VALIGN")) valign = tag.GetParam("VALIGN"); else valign = m_tValign;
 266         valign.MakeUpper();
 267         if (valign == "TOP") m_CellInfo[r][c].valign = HTML_ALIGN_TOP;
 268         else if (valign == "BOTTOM") m_CellInfo[r][c].valign = HTML_ALIGN_BOTTOM;
 269         else m_CellInfo[r][c].valign = HTML_ALIGN_CENTER;
 270     }
 271
 272     cell -> SetIndent(m_Padding, HTML_INDENT_ALL, HTML_UNITS_PIXELS);
 273 }
 274
 275
 276
 277
 278
 279 void wxHtmlTableCell::Layout(int w)
 280 {
 281     /*
 282
 283     WIDTH ADJUSTING :
 284
 285     */
 286
 287     if (m_WidthFloatUnits == HTML_UNITS_PERCENT) {
 288         if (m_WidthFloat < 0) m_Width = (100 + m_WidthFloat) * w / 100;
 289         else m_Width = m_WidthFloat * w / 100;
 290     }
 291     else {
 292         if (m_WidthFloat < 0) m_Width = w + m_WidthFloat;
 293         else m_Width = m_WidthFloat;
 294     }
 295
 296
 297     /*
 298
 299     LAYOUTING :
 300
 301     */
 302
 303     /* 1.  setup columns widths: */
 304     {
 305         int wpix = m_Width - (m_NumCols + 1) * m_Spacing;
 306         int i, j;
 307         int wtemp = 0;
 308
 309         // 1a. setup fixed-width columns:
 310         for (i = 0; i < m_NumCols; i++)
 311             if (m_ColsInfo[i].units == HTML_UNITS_PIXELS)
 312                 wpix -= (m_ColsInfo[i].pixwidth = m_ColsInfo[i].width);
 313
 314         // 1b. setup floating-width columns:
 315         for (i = 0; i < m_NumCols; i++)
 316             if ((m_ColsInfo[i].units == HTML_UNITS_PERCENT) && (m_ColsInfo[i].width != 0))
 317                 wtemp += (m_ColsInfo[i].pixwidth = m_ColsInfo[i].width * wpix / 100);
 318         wpix -= wtemp;
 319
 320         // 1c. setup defalut columns (no width specification supplied):
 321         // NOTE! This algorithm doesn't conform to HTML standard : it assigns equal widths
 322         // instead of optimal
 323         for (i = j = 0; i < m_NumCols; i++)
 324             if (m_ColsInfo[i].width == 0) j++;
 325         for (i = 0; i < m_NumCols; i++)
 326             if (m_ColsInfo[i].width == 0)
 327                 m_ColsInfo[i].pixwidth = wpix / j;
 328     }
 329
 330     /* 2.  compute positions of columns: */
 331     {
 332         int wpos = m_Spacing;
 333         for (int i = 0; i < m_NumCols; i++) {
 334             m_ColsInfo[i].leftpos = wpos;
 335             wpos += m_ColsInfo[i].pixwidth + m_Spacing;
 336         }
 337     }
 338
 339     /* 3.  sub-layout all cells: */
 340     {
 341         int *ypos = (int*) malloc(sizeof(int) * (m_NumRows + 1));
 342
 343         int actcol, actrow;
 344         int fullwid;
 345         wxHtmlContainerCell *actcell;
 346
 347         for (actrow = 0; actrow <= m_NumRows; actrow++) ypos[actrow] = m_Spacing;
 348
 349         for (actrow = 0; actrow < m_NumRows; actrow++) {
 350
 351             // 3a. sub-layout and detect max height:
 352
 353             for (actcol = 0; actcol < m_NumCols; actcol++) {
 354                 if (m_CellInfo[actrow][actcol].flag != cellUsed) continue;
 355                 actcell = m_CellInfo[actrow][actcol].cont;
 356                 fullwid = 0;
 357                 for (int i = actcol; i < m_CellInfo[actrow][actcol].colspan + actcol; i++)
 358                     fullwid += m_ColsInfo[i].pixwidth;
 359                 actcell -> SetMinHeight(m_CellInfo[actrow][actcol].minheight, m_CellInfo[actrow][actcol].valign);
 360                 actcell -> Layout(fullwid);
 361
 362                 if (ypos[actrow] + actcell -> GetHeight() + m_CellInfo[actrow][actcol].rowspan * m_Spacing > ypos[actrow + m_CellInfo[actrow][actcol].rowspan])
 363                     ypos[actrow + m_CellInfo[actrow][actcol].rowspan] =
 364                             ypos[actrow] + actcell -> GetHeight() + m_CellInfo[actrow][actcol].rowspan * m_Spacing;
 365             }
 366         }
 367
 368
 369         for (actrow = 0; actrow < m_NumRows; actrow++) {
 370
 371             // 3b. place cells in row & let'em all have same height:
 372
 373             for (actcol = 0; actcol < m_NumCols; actcol++) {
 374                 if (m_CellInfo[actrow][actcol].flag != cellUsed) continue;
 375                 actcell = m_CellInfo[actrow][actcol].cont;
 376                 actcell -> SetMinHeight(
 377                                  ypos[actrow + m_CellInfo[actrow][actcol].rowspan] - ypos[actrow] - m_CellInfo[actrow][actcol].rowspan * m_Spacing,
 378                                  m_CellInfo[actrow][actcol].valign);
 379                 fullwid = 0;
 380                 for (int i = actcol; i < m_CellInfo[actrow][actcol].colspan + actcol; i++)
 381                     fullwid += m_ColsInfo[i].pixwidth;
 382                 actcell -> Layout(fullwid);
 383                 actcell -> SetPos(m_ColsInfo[actcol].leftpos, ypos[actrow]);
 384             }
 385
 386         }
 387         m_Height = ypos[m_NumRows];
 388         free(ypos);
 389     }
 390 }
 391
 392
 393
 394
 395
 396
 397 //-----------------------------------------------------------------------------
 398 // The tables handler:
 399 //-----------------------------------------------------------------------------
 400
 401
 402 TAG_HANDLER_BEGIN(TABLE, "TABLE,TR,TD,TH")
 403
 404     TAG_HANDLER_VARS
 405         wxHtmlTableCell* m_Table;
 406         wxString m_tAlign, m_rAlign;
 407         int m_OldAlign;
 408
 409     TAG_HANDLER_CONSTR(TABLE)
 410     {
 411         m_Table = NULL;
 412     m_tAlign = m_rAlign = wxEmptyString;
 413     m_OldAlign = HTML_ALIGN_LEFT;
 414     }
 415
 416
 417     TAG_HANDLER_PROC(tag)
 418     {
 419         wxHtmlContainerCell *c;
 420
 421         // new table started, backup upper-level table (if any) and create new:
 422         if (tag.GetName() == "TABLE") {
 423             wxHtmlTableCell *oldt = m_Table;
 424             wxHtmlContainerCell *oldcont;
 425             int m_OldAlign;
 426
 427             oldcont = c = m_WParser -> OpenContainer();
 428
 429             c -> SetWidthFloat(tag);
 430             m_Table = new wxHtmlTableCell(c, tag);
 431             m_OldAlign = m_WParser -> GetAlign();
 432             m_tAlign = wxEmptyString;
 433             if (tag.HasParam("ALIGN")) m_tAlign = tag.GetParam("ALIGN");
 434
 435             ParseInner(tag);
 436
 437             m_WParser -> SetAlign(m_OldAlign);
 438             m_WParser -> SetContainer(oldcont);
 439             m_WParser -> CloseContainer();
 440             m_Table = oldt;
 441             return TRUE;
 442         }
 443
 444
 445         else if (m_Table && !tag.IsEnding()) {
 446             // new row in table
 447             if (tag.GetName() == "TR") {
 448                 m_Table -> AddRow(tag);
 449                 m_rAlign = m_tAlign;
 450                 if (tag.HasParam("ALIGN")) m_rAlign = tag.GetParam("ALIGN");
 451             }
 452
 453             // new cell
 454             else {
 455                 m_WParser -> SetAlign(m_OldAlign);
 456                 c = m_WParser -> SetContainer(new wxHtmlContainerCell(m_Table));
 457                 m_Table -> AddCell(c, tag);
 458
 459                 m_WParser -> OpenContainer();
 460
 461                 if (tag.GetName() == "TH") /*header style*/ {
 462                     m_WParser -> SetAlign(HTML_ALIGN_CENTER);
 463                 }
 464
 465                 {
 466                     wxString als;
 467
 468                     als = m_rAlign;
 469                     if (tag.HasParam("ALIGN")) als = tag.GetParam("ALIGN");
 470                     als.MakeUpper();
 471                     if (als == "RIGHT") m_WParser -> SetAlign(HTML_ALIGN_RIGHT);
 472                     else if (als == "CENTER") m_WParser -> SetAlign(HTML_ALIGN_CENTER);
 473                 }
 474                 m_WParser -> OpenContainer();
 475             }
 476         }
 477         return FALSE;
 478     }
 479
 480 TAG_HANDLER_END(TABLE)
 481
 482
 483
 484
 485
 486 TAGS_MODULE_BEGIN(Tables)
 487
 488     TAGS_MODULE_ADD(TABLE)
 489
 490 TAGS_MODULE_END(Tables)
 491
 492
 493 #endif