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
  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 m_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(m_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         double m_PixelScale;
  97
  98
  99     public:
 100         wxHtmlTableCell(wxHtmlContainerCell *parent, const wxHtmlTag& tag, double pixel_scale = 1.0);
 101         ~wxHtmlTableCell();
 102         virtual void Layout(int w);
 103
 104         void AddRow(const wxHtmlTag& tag);
 105         void AddCell(wxHtmlContainerCell *cell, const wxHtmlTag& tag);
 106     private:
 107         void ReallocCols(int cols);
 108         void ReallocRows(int rows);
 109                 // reallocates memory to given number of cols/rows
 110                 // and changes m_NumCols/m_NumRows value to reflect this change
 111                 // NOTE! You CAN'T change m_NumCols/m_NumRows before calling this!!
 112 };
 113
 114
 115
 116 wxHtmlTableCell::wxHtmlTableCell(wxHtmlContainerCell *parent, const wxHtmlTag& tag, double pixel_scale)
 117  : wxHtmlContainerCell(parent)
 118 {
 119     m_PixelScale = pixel_scale;
 120     m_HasBorders = (tag.HasParam(wxT("BORDER")) && tag.GetParam(wxT("BORDER")) != wxT("0"));
 121     m_ColsInfo = NULL;
 122     m_NumCols = m_NumRows = 0;
 123     m_CellInfo = NULL;
 124     m_ActualCol = m_ActualRow = -1;
 125
 126     /* scan params: */
 127     m_tBkg = m_rBkg = -1;
 128     if (tag.HasParam(wxT("BGCOLOR"))) tag.ScanParam(wxT("BGCOLOR"), wxT("#%lX"), &m_tBkg);
 129     if (tag.HasParam(wxT("VALIGN"))) m_tValign = tag.GetParam(wxT("VALIGN")); else m_tValign = wxEmptyString;
 130     if (tag.HasParam(wxT("CELLSPACING")) && tag.ScanParam(wxT("CELLSPACING"), wxT("%i"), &m_Spacing) == 1) {} else m_Spacing = 2;
 131     if (tag.HasParam(wxT("CELLPADDING")) && tag.ScanParam(wxT("CELLPADDING"), wxT("%i"), &m_Padding) == 1) {} else m_Padding = 3;
 132     m_Spacing = (int)(m_PixelScale * (double)m_Spacing);
 133     m_Padding = (int)(m_PixelScale * (double)m_Padding);
 134
 135     if (m_HasBorders)
 136         SetBorder(TABLE_BORDER_CLR_1, TABLE_BORDER_CLR_2);
 137 }
 138
 139
 140
 141 wxHtmlTableCell::~wxHtmlTableCell()
 142 {
 143     if (m_ColsInfo) free(m_ColsInfo);
 144     if (m_CellInfo) {
 145         for (int i = 0; i < m_NumRows; i++)
 146             free(m_CellInfo[i]);
 147         free(m_CellInfo);
 148     }
 149 }
 150
 151
 152
 153 void wxHtmlTableCell::ReallocCols(int cols)
 154 {
 155     int i,j;
 156
 157     for (i = 0; i < m_NumRows; i++) {
 158         m_CellInfo[i] = (cellStruct*) realloc(m_CellInfo[i], sizeof(cellStruct) * cols);
 159         for (j = m_NumCols; j < cols; j++)
 160             m_CellInfo[i][j].flag = cellFree;
 161     }
 162
 163     m_ColsInfo = (colStruct*) realloc(m_ColsInfo, sizeof(colStruct) * cols);
 164     for (j = m_NumCols; j < cols; j++) {
 165            m_ColsInfo[j].width = 0;
 166            m_ColsInfo[j].units = wxHTML_UNITS_PERCENT;
 167     }
 168
 169     m_NumCols = cols;
 170 }
 171
 172
 173
 174 void wxHtmlTableCell::ReallocRows(int rows)
 175 {
 176     m_CellInfo = (cellStruct**) realloc(m_CellInfo, sizeof(cellStruct*) * rows);
 177     for (int row = m_NumRows; row < rows ; row++)
 178     {
 179         if (m_NumCols == 0)
 180             m_CellInfo[row] = NULL;
 181         else
 182         {
 183             m_CellInfo[row] = (cellStruct*) malloc(sizeof(cellStruct) * m_NumCols);
 184             for (int col = 0; col < m_NumCols; col++)
 185                 m_CellInfo[row][col].flag = cellFree;
 186         }
 187     }
 188     m_NumRows = rows;
 189 }
 190
 191
 192 void wxHtmlTableCell::AddRow(const wxHtmlTag& tag)
 193 {
 194     if (m_ActualRow + 1 > m_NumRows - 1)
 195         ReallocRows(m_ActualRow + 2);
 196     m_ActualRow++;
 197     m_ActualCol = -1;
 198
 199     /* scan params: */
 200     m_rBkg = m_tBkg;
 201     if (tag.HasParam(wxT("BGCOLOR"))) tag.ScanParam(wxT("BGCOLOR"), wxT("#%lX"), &m_rBkg);
 202     if (tag.HasParam(wxT("VALIGN"))) m_rValign = tag.GetParam(wxT("VALIGN")); else m_rValign = m_tValign;
 203 }
 204
 205
 206
 207 void wxHtmlTableCell::AddCell(wxHtmlContainerCell *cell, const wxHtmlTag& tag)
 208 {
 209     do {
 210         m_ActualCol++;
 211     } while ((m_ActualCol < m_NumCols) && (m_CellInfo[m_ActualRow][m_ActualCol].flag != cellFree));
 212     if (m_ActualCol > m_NumCols - 1)
 213         ReallocCols(m_ActualCol + 1);
 214
 215     int r = m_ActualRow, c = m_ActualCol;
 216
 217     m_CellInfo[r][c].cont = cell;
 218     m_CellInfo[r][c].colspan = 1;
 219     m_CellInfo[r][c].rowspan = 1;
 220     m_CellInfo[r][c].flag = cellUsed;
 221     m_CellInfo[r][c].minheight = 0;
 222     m_CellInfo[r][c].valign = wxHTML_ALIGN_TOP;
 223
 224     /* scan for parameters: */
 225
 226     // width:
 227     {
 228         if (tag.HasParam("WIDTH")) {
 229             wxString wd = tag.GetParam("WIDTH");
 230
 231             if (wd[wd.Length()-1] == '%') {
 232                 wxSscanf(wd.c_str(), wxT("%i%%"), &m_ColsInfo[c].width);
 233                 m_ColsInfo[c].units = wxHTML_UNITS_PERCENT;
 234             }
 235             else {
 236                 wxSscanf(wd.c_str(), wxT("%i"), &m_ColsInfo[c].width);
 237                 m_ColsInfo[c].width = (int)(m_PixelScale * (double)m_ColsInfo[c].width);
 238                 m_ColsInfo[c].units = wxHTML_UNITS_PIXELS;
 239             }
 240         }
 241     }
 242
 243
 244     // spanning:
 245     {
 246         if (tag.HasParam(wxT("COLSPAN"))) tag.ScanParam(wxT("COLSPAN"), wxT("%i"), &m_CellInfo[r][c].colspan);
 247         if (tag.HasParam(wxT("ROWSPAN"))) tag.ScanParam(wxT("ROWSPAN"), wxT("%i"), &m_CellInfo[r][c].rowspan);
 248         if ((m_CellInfo[r][c].colspan != 1) || (m_CellInfo[r][c].rowspan != 1)) {
 249             int i, j;
 250
 251             if (r + m_CellInfo[r][c].rowspan > m_NumRows) ReallocRows(r + m_CellInfo[r][c].rowspan);
 252             if (c + m_CellInfo[r][c].colspan > m_NumCols) ReallocCols(c + m_CellInfo[r][c].colspan);
 253             for (i = r; i < r + m_CellInfo[r][c].rowspan; i++)
 254                 for (j = c; j < c + m_CellInfo[r][c].colspan; j++)
 255                     m_CellInfo[i][j].flag = cellSpan;
 256             m_CellInfo[r][c].flag = cellUsed;
 257         }
 258     }
 259
 260     //background color:
 261     {
 262         int bk = m_rBkg;
 263         if (tag.HasParam(wxT("BGCOLOR"))) tag.ScanParam(wxT("BGCOLOR"), wxT("#%lX"), &bk);
 264         if (bk != -1) {
 265             wxColour clr = wxColour((bk & 0xFF0000) >> 16 , (bk & 0x00FF00) >> 8, (bk & 0x0000FF));
 266             cell -> SetBackgroundColour(clr);
 267         }
 268     }
 269     if (m_HasBorders)
 270         cell -> SetBorder(TABLE_BORDER_CLR_2, TABLE_BORDER_CLR_1);
 271
 272     // vertical alignment:
 273     {
 274         wxString valign;
 275         if (tag.HasParam(wxT("VALIGN"))) valign = tag.GetParam(wxT("VALIGN")); else valign = m_tValign;
 276         valign.MakeUpper();
 277         if (valign == wxT("TOP")) m_CellInfo[r][c].valign = wxHTML_ALIGN_TOP;
 278         else if (valign == wxT("BOTTOM")) m_CellInfo[r][c].valign = wxHTML_ALIGN_BOTTOM;
 279         else m_CellInfo[r][c].valign = wxHTML_ALIGN_CENTER;
 280     }
 281
 282     cell -> SetIndent(m_Padding, wxHTML_INDENT_ALL, wxHTML_UNITS_PIXELS);
 283 }
 284
 285
 286
 287
 288
 289 void wxHtmlTableCell::Layout(int w)
 290 {
 291     /*
 292
 293     WIDTH ADJUSTING :
 294
 295     */
 296
 297     if (m_WidthFloatUnits == wxHTML_UNITS_PERCENT) {
 298         if (m_WidthFloat < 0) m_Width = (100 + m_WidthFloat) * w / 100;
 299         else m_Width = m_WidthFloat * w / 100;
 300     }
 301     else {
 302         if (m_WidthFloat < 0) m_Width = w + m_WidthFloat;
 303         else m_Width = m_WidthFloat;
 304     }
 305
 306
 307     /*
 308
 309     LAYOUTING :
 310
 311     */
 312
 313     /* 1.  setup columns widths: */
 314     {
 315         int wpix = m_Width - (m_NumCols + 1) * m_Spacing;
 316         int i, j;
 317         int wtemp = 0;
 318
 319         // 1a. setup fixed-width columns:
 320         for (i = 0; i < m_NumCols; i++)
 321             if (m_ColsInfo[i].units == wxHTML_UNITS_PIXELS)
 322                 wpix -= (m_ColsInfo[i].pixwidth = m_ColsInfo[i].width);
 323
 324         // 1b. setup floating-width columns:
 325         for (i = 0; i < m_NumCols; i++)
 326             if ((m_ColsInfo[i].units == wxHTML_UNITS_PERCENT) && (m_ColsInfo[i].width != 0))
 327                 wtemp += (m_ColsInfo[i].pixwidth = m_ColsInfo[i].width * wpix / 100);
 328         wpix -= wtemp;
 329
 330         // 1c. setup defalut columns (no width specification supplied):
 331         // NOTE! This algorithm doesn't conform to HTML standard : it assigns equal widths
 332         // instead of optimal
 333         for (i = j = 0; i < m_NumCols; i++)
 334             if (m_ColsInfo[i].width == 0) j++;
 335         for (i = 0; i < m_NumCols; i++)
 336             if (m_ColsInfo[i].width == 0)
 337                 m_ColsInfo[i].pixwidth = wpix / j;
 338     }
 339
 340     /* 2.  compute positions of columns: */
 341     {
 342         int wpos = m_Spacing;
 343         for (int i = 0; i < m_NumCols; i++) {
 344             m_ColsInfo[i].leftpos = wpos;
 345             wpos += m_ColsInfo[i].pixwidth + m_Spacing;
 346         }
 347     }
 348
 349     /* 3.  sub-layout all cells: */
 350     {
 351         int *ypos = new int[m_NumRows + 1];
 352
 353         int actcol, actrow;
 354         int fullwid;
 355         wxHtmlContainerCell *actcell;
 356
 357         for (actrow = 0; actrow <= m_NumRows; actrow++) ypos[actrow] = m_Spacing;
 358
 359         for (actrow = 0; actrow < m_NumRows; actrow++) {
 360
 361             // 3a. sub-layout and detect max height:
 362
 363             for (actcol = 0; actcol < m_NumCols; actcol++) {
 364                 if (m_CellInfo[actrow][actcol].flag != cellUsed) continue;
 365                 actcell = m_CellInfo[actrow][actcol].cont;
 366                 fullwid = 0;
 367                 for (int i = actcol; i < m_CellInfo[actrow][actcol].colspan + actcol; i++)
 368                     fullwid += m_ColsInfo[i].pixwidth;
 369                 fullwid += (m_CellInfo[actrow][actcol].colspan - 1) * m_Spacing;
 370                 actcell -> SetMinHeight(m_CellInfo[actrow][actcol].minheight, m_CellInfo[actrow][actcol].valign);
 371                 actcell -> Layout(fullwid);
 372
 373                 if (ypos[actrow] + actcell -> GetHeight() + m_CellInfo[actrow][actcol].rowspan * m_Spacing > ypos[actrow + m_CellInfo[actrow][actcol].rowspan])
 374                     ypos[actrow + m_CellInfo[actrow][actcol].rowspan] =
 375                             ypos[actrow] + actcell -> GetHeight() + m_CellInfo[actrow][actcol].rowspan * m_Spacing;
 376             }
 377         }
 378
 379
 380         for (actrow = 0; actrow < m_NumRows; actrow++) {
 381
 382             // 3b. place cells in row & let'em all have same height:
 383
 384             for (actcol = 0; actcol < m_NumCols; actcol++) {
 385                 if (m_CellInfo[actrow][actcol].flag != cellUsed) continue;
 386                 actcell = m_CellInfo[actrow][actcol].cont;
 387                 actcell -> SetMinHeight(
 388                                  ypos[actrow + m_CellInfo[actrow][actcol].rowspan] - ypos[actrow] -  m_Spacing,
 389                                  m_CellInfo[actrow][actcol].valign);
 390                 fullwid = 0;
 391                 for (int i = actcol; i < m_CellInfo[actrow][actcol].colspan + actcol; i++)
 392                     fullwid += m_ColsInfo[i].pixwidth;
 393                 fullwid += (m_CellInfo[actrow][actcol].colspan - 1) * m_Spacing;
 394                 actcell -> Layout(fullwid);
 395                 actcell -> SetPos(m_ColsInfo[actcol].leftpos, ypos[actrow]);
 396             }
 397
 398         }
 399         m_Height = ypos[m_NumRows];
 400         delete[] ypos;
 401     }
 402 }
 403
 404
 405
 406
 407
 408
 409 //-----------------------------------------------------------------------------
 410 // The tables handler:
 411 //-----------------------------------------------------------------------------
 412
 413
 414 TAG_HANDLER_BEGIN(TABLE, "TABLE,TR,TD,TH")
 415
 416     TAG_HANDLER_VARS
 417         wxHtmlTableCell* m_Table;
 418         wxString m_tAlign, m_rAlign;
 419         int m_OldAlign;
 420
 421     TAG_HANDLER_CONSTR(TABLE)
 422     {
 423         m_Table = NULL;
 424         m_tAlign = m_rAlign = wxEmptyString;
 425         m_OldAlign = wxHTML_ALIGN_LEFT;
 426     }
 427
 428
 429     TAG_HANDLER_PROC(tag)
 430     {
 431         wxHtmlContainerCell *c;
 432
 433         // new table started, backup upper-level table (if any) and create new:
 434         if (tag.GetName() == wxT("TABLE")) {
 435             wxHtmlTableCell *oldt = m_Table;
 436             wxHtmlContainerCell *oldcont;
 437             int m_OldAlign;
 438
 439             oldcont = c = m_WParser -> OpenContainer();
 440
 441             c -> SetWidthFloat(tag, m_WParser -> GetPixelScale());
 442             m_Table = new wxHtmlTableCell(c, tag, m_WParser -> GetPixelScale());
 443             m_OldAlign = m_WParser -> GetAlign();
 444             m_tAlign = wxEmptyString;
 445             if (tag.HasParam(wxT("ALIGN"))) m_tAlign = tag.GetParam(wxT("ALIGN"));
 446
 447             ParseInner(tag);
 448
 449             m_WParser -> SetAlign(m_OldAlign);
 450             m_WParser -> SetContainer(oldcont);
 451             m_WParser -> CloseContainer();
 452             m_Table = oldt;
 453             return TRUE;
 454         }
 455
 456
 457         else if (m_Table && !tag.IsEnding()) {
 458             // new row in table
 459             if (tag.GetName() == wxT("TR")) {
 460                 m_Table -> AddRow(tag);
 461                 m_rAlign = m_tAlign;
 462                 if (tag.HasParam(wxT("ALIGN"))) m_rAlign = tag.GetParam(wxT("ALIGN"));
 463             }
 464
 465             // new cell
 466             else {
 467                 m_WParser -> SetAlign(m_OldAlign);
 468                 c = m_WParser -> SetContainer(new wxHtmlContainerCell(m_Table));
 469                 m_Table -> AddCell(c, tag);
 470
 471                 m_WParser -> OpenContainer();
 472
 473                 if (tag.GetName() == wxT("TH")) /*header style*/ {
 474                     m_WParser -> SetAlign(wxHTML_ALIGN_CENTER);
 475                 }
 476
 477                 {
 478                     wxString als;
 479
 480                     als = m_rAlign;
 481                     if (tag.HasParam(wxT("ALIGN"))) als = tag.GetParam(wxT("ALIGN"));
 482                     als.MakeUpper();
 483                     if (als == wxT("RIGHT")) m_WParser -> SetAlign(wxHTML_ALIGN_RIGHT);
 484                     else if (als == wxT("CENTER")) m_WParser -> SetAlign(wxHTML_ALIGN_CENTER);
 485                 }
 486                 m_WParser -> OpenContainer();
 487             }
 488         }
 489         return FALSE;
 490     }
 491
 492 TAG_HANDLER_END(TABLE)
 493
 494
 495
 496
 497
 498 TAGS_MODULE_BEGIN(Tables)
 499
 500     TAGS_MODULE_ADD(TABLE)
 501
 502 TAGS_MODULE_END(Tables)
 503
 504
 505 #endif