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