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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 && wxUSE_STREAMS
18 #ifdef __BORDLANDC__
19 #pragma hdrstop
20 #endif
21
22 #ifndef WXPRECOMP
23 #endif
24
25
26 /*
27 REMARKS:
28 1. This version of m_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(m_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 struct colStruct
51 {
52 int width, units;
53 // width of the column either in pixels or percents
54 // ('width' is the number, 'units' determines its meaning)
55 int minWidth, maxWidth;
56 // minimal/maximal column width. This is needed by HTML 4.0
57 // layouting algorithm and can be determined by trying to
58 // layout table cells with width=1 and width=infinity
59 int leftpos, pixwidth, maxrealwidth;
60 // temporary (depends on actual width of table)
61 };
62
63 enum cellState
64 {
65 cellSpan,
66 cellUsed,
67 cellFree
68 };
69
70 struct cellStruct
71 {
72 wxHtmlContainerCell *cont;
73 int colspan, rowspan;
74 int minheight, valign;
75 cellState flag;
76 };
77
78
79 class wxHtmlTableCell : public wxHtmlContainerCell
80 {
81 protected:
82 /* These are real attributes: */
83
84 // should we draw borders or not?
85 bool m_HasBorders;
86 // number of columns; rows
87 int m_NumCols, m_NumRows;
88 // array of column information
89 colStruct *m_ColsInfo;
90 // 2D array of all cells in the table : m_CellInfo[row][column]
91 cellStruct **m_CellInfo;
92 // spaces between cells
93 int m_Spacing;
94 // cells internal indentation
95 int m_Padding;
96
97 private:
98 /* ...and these are valid only when parsing the table: */
99
100 // number of actual column (ranging from 0..m_NumCols)
101 int m_ActualCol, m_ActualRow;
102
103 // default values (for table and row):
104 wxColour m_tBkg, m_rBkg;
105 wxString m_tValign, m_rValign;
106
107 double m_PixelScale;
108
109
110 public:
111 wxHtmlTableCell(wxHtmlContainerCell *parent, const wxHtmlTag& tag, double pixel_scale = 1.0);
112 ~wxHtmlTableCell();
113 virtual void Layout(int w);
114
115 void AddRow(const wxHtmlTag& tag);
116 void AddCell(wxHtmlContainerCell *cell, const wxHtmlTag& tag);
117
118 private:
119 // Reallocates memory to given number of cols/rows
120 // and changes m_NumCols/m_NumRows value to reflect this change
121 // NOTE! You CAN'T change m_NumCols/m_NumRows before calling this!!
122 void ReallocCols(int cols);
123 void ReallocRows(int rows);
124
125 // Computes minimal and maximal widths of columns. Needs to be called
126 // only once, before first Layout().
127 void ComputeMinMaxWidths();
128 };
129
130
131
132 wxHtmlTableCell::wxHtmlTableCell(wxHtmlContainerCell *parent, const wxHtmlTag& tag, double pixel_scale)
133 : wxHtmlContainerCell(parent)
134 {
135 m_PixelScale = pixel_scale;
136 m_HasBorders =
137 (tag.HasParam(wxT("BORDER")) && tag.GetParam(wxT("BORDER")) != wxT("0"));
138 m_ColsInfo = NULL;
139 m_NumCols = m_NumRows = 0;
140 m_CellInfo = NULL;
141 m_ActualCol = m_ActualRow = -1;
142
143 /* scan params: */
144 if (tag.HasParam(wxT("BGCOLOR")))
145 tag.GetParamAsColour(wxT("BGCOLOR"), &m_tBkg);
146 if (tag.HasParam(wxT("VALIGN")))
147 m_tValign = tag.GetParam(wxT("VALIGN"));
148 else
149 m_tValign = wxEmptyString;
150 if (!tag.GetParamAsInt(wxT("CELLSPACING"), &m_Spacing))
151 m_Spacing = 2;
152 if (!tag.GetParamAsInt(wxT("CELLPADDING"), &m_Padding))
153 m_Padding = 3;
154 m_Spacing = (int)(m_PixelScale * (double)m_Spacing);
155 m_Padding = (int)(m_PixelScale * (double)m_Padding);
156
157 if (m_HasBorders)
158 SetBorder(TABLE_BORDER_CLR_1, TABLE_BORDER_CLR_2);
159 }
160
161
162
163 wxHtmlTableCell::~wxHtmlTableCell()
164 {
165 if (m_ColsInfo) free(m_ColsInfo);
166 if (m_CellInfo)
167 {
168 for (int i = 0; i < m_NumRows; i++)
169 free(m_CellInfo[i]);
170 free(m_CellInfo);
171 }
172 }
173
174
175
176 void wxHtmlTableCell::ReallocCols(int cols)
177 {
178 int i,j;
179
180 for (i = 0; i < m_NumRows; i++)
181 {
182 m_CellInfo[i] = (cellStruct*) realloc(m_CellInfo[i], sizeof(cellStruct) * cols);
183 for (j = m_NumCols; j < cols; j++)
184 m_CellInfo[i][j].flag = cellFree;
185 }
186
187 m_ColsInfo = (colStruct*) realloc(m_ColsInfo, sizeof(colStruct) * cols);
188 for (j = m_NumCols; j < cols; j++)
189 {
190 m_ColsInfo[j].width = 0;
191 m_ColsInfo[j].units = wxHTML_UNITS_PERCENT;
192 m_ColsInfo[j].minWidth = m_ColsInfo[j].maxWidth = -1;
193 }
194
195 m_NumCols = cols;
196 }
197
198
199
200 void wxHtmlTableCell::ReallocRows(int rows)
201 {
202 m_CellInfo = (cellStruct**) realloc(m_CellInfo, sizeof(cellStruct*) * rows);
203 for (int row = m_NumRows; row < rows ; row++)
204 {
205 if (m_NumCols == 0)
206 m_CellInfo[row] = NULL;
207 else
208 {
209 m_CellInfo[row] = (cellStruct*) malloc(sizeof(cellStruct) * m_NumCols);
210 for (int col = 0; col < m_NumCols; col++)
211 m_CellInfo[row][col].flag = cellFree;
212 }
213 }
214 m_NumRows = rows;
215 }
216
217
218 void wxHtmlTableCell::AddRow(const wxHtmlTag& tag)
219 {
220 m_ActualCol = -1;
221 // VS: real allocation of row entry is done in AddCell in order
222 // to correctly handle empty rows (i.e. "<tr></tr>")
223 // m_ActualCol == -1 indicates that AddCell has to allocate new row.
224
225 // scan params:
226 m_rBkg = m_tBkg;
227 if (tag.HasParam(wxT("BGCOLOR")))
228 tag.GetParamAsColour(wxT("BGCOLOR"), &m_rBkg);
229 if (tag.HasParam(wxT("VALIGN")))
230 m_rValign = tag.GetParam(wxT("VALIGN"));
231 else
232 m_rValign = m_tValign;
233 }
234
235
236
237 void wxHtmlTableCell::AddCell(wxHtmlContainerCell *cell, const wxHtmlTag& tag)
238 {
239 // Is this cell in new row?
240 // VS: we can't do it in AddRow, see my comment there
241 if (m_ActualCol == -1)
242 {
243 if (m_ActualRow + 1 > m_NumRows - 1)
244 ReallocRows(m_ActualRow + 2);
245 m_ActualRow++;
246 }
247
248 // cells & columns:
249 do
250 {
251 m_ActualCol++;
252 } while ((m_ActualCol < m_NumCols) &&
253 (m_CellInfo[m_ActualRow][m_ActualCol].flag != cellFree));
254
255 if (m_ActualCol > m_NumCols - 1)
256 ReallocCols(m_ActualCol + 1);
257
258 int r = m_ActualRow, c = m_ActualCol;
259
260 m_CellInfo[r][c].cont = cell;
261 m_CellInfo[r][c].colspan = 1;
262 m_CellInfo[r][c].rowspan = 1;
263 m_CellInfo[r][c].flag = cellUsed;
264 m_CellInfo[r][c].minheight = 0;
265 m_CellInfo[r][c].valign = wxHTML_ALIGN_TOP;
266
267 /* scan for parameters: */
268
269 // width:
270 {
271 if (tag.HasParam(wxT("WIDTH")))
272 {
273 wxString wd = tag.GetParam(wxT("WIDTH"));
274
275 if (wd[wd.Length()-1] == wxT('%'))
276 {
277 wxSscanf(wd.c_str(), wxT("%i%%"), &m_ColsInfo[c].width);
278 m_ColsInfo[c].units = wxHTML_UNITS_PERCENT;
279 }
280 else
281 {
282 wxSscanf(wd.c_str(), wxT("%i"), &m_ColsInfo[c].width);
283 m_ColsInfo[c].width = (int)(m_PixelScale * (double)m_ColsInfo[c].width);
284 m_ColsInfo[c].units = wxHTML_UNITS_PIXELS;
285 }
286 }
287 }
288
289
290 // spanning:
291 {
292 tag.GetParamAsInt(wxT("COLSPAN"), &m_CellInfo[r][c].colspan);
293 tag.GetParamAsInt(wxT("ROWSPAN"), &m_CellInfo[r][c].rowspan);
294
295 // VS: the standard says this about col/rowspan:
296 // "This attribute specifies the number of rows spanned by the
297 // current cell. The default value of this attribute is one ("1").
298 // The value zero ("0") means that the cell spans all rows from the
299 // current row to the last row of the table." All mainstream
300 // browsers act as if 0==1, though, and so does wxHTML.
301 if (m_CellInfo[r][c].colspan < 1)
302 m_CellInfo[r][c].colspan = 1;
303 if (m_CellInfo[r][c].rowspan < 1)
304 m_CellInfo[r][c].rowspan = 1;
305
306 if ((m_CellInfo[r][c].colspan > 1) || (m_CellInfo[r][c].rowspan > 1))
307 {
308 int i, j;
309
310 if (r + m_CellInfo[r][c].rowspan > m_NumRows)
311 ReallocRows(r + m_CellInfo[r][c].rowspan);
312 if (c + m_CellInfo[r][c].colspan > m_NumCols)
313 ReallocCols(c + m_CellInfo[r][c].colspan);
314 for (i = r; i < r + m_CellInfo[r][c].rowspan; i++)
315 for (j = c; j < c + m_CellInfo[r][c].colspan; j++)
316 m_CellInfo[i][j].flag = cellSpan;
317 m_CellInfo[r][c].flag = cellUsed;
318 }
319 }
320
321 //background color:
322 {
323 wxColour bk = m_rBkg;
324 if (tag.HasParam(wxT("BGCOLOR")))
325 tag.GetParamAsColour(wxT("BGCOLOR"), &bk);
326 if (bk.Ok())
327 cell->SetBackgroundColour(bk);
328 }
329 if (m_HasBorders)
330 cell->SetBorder(TABLE_BORDER_CLR_2, TABLE_BORDER_CLR_1);
331
332 // vertical alignment:
333 {
334 wxString valign;
335 if (tag.HasParam(wxT("VALIGN")))
336 valign = tag.GetParam(wxT("VALIGN"));
337 else
338 valign = m_tValign;
339 valign.MakeUpper();
340 if (valign == wxT("TOP"))
341 m_CellInfo[r][c].valign = wxHTML_ALIGN_TOP;
342 else if (valign == wxT("BOTTOM"))
343 m_CellInfo[r][c].valign = wxHTML_ALIGN_BOTTOM;
344 else m_CellInfo[r][c].valign = wxHTML_ALIGN_CENTER;
345 }
346
347 cell->SetIndent(m_Padding, wxHTML_INDENT_ALL, wxHTML_UNITS_PIXELS);
348 }
349
350 void wxHtmlTableCell::ComputeMinMaxWidths()
351 {
352 if (m_NumCols == 0 || m_ColsInfo[0].minWidth != -1) return;
353
354 int left, right, width;
355
356 for (int c = 0; c < m_NumCols; c++)
357 {
358 for (int r = 0; r < m_NumRows; r++)
359 {
360 cellStruct& cell = m_CellInfo[r][c];
361 if (cell.flag == cellUsed)
362 {
363 cell.cont->Layout(2*m_Padding + 1);
364 cell.cont->GetHorizontalConstraints(&left, &right);
365 width = right - left;
366 width -= (cell.colspan-1) * m_Spacing;
367 // HTML 4.0 says it is acceptable to distribute min/max
368 // width of spanning cells evently
369 width /= cell.colspan;
370 for (int j = 0; j < cell.colspan; j++)
371 if (width > m_ColsInfo[c+j].minWidth)
372 m_ColsInfo[c+j].minWidth = width;
373 }
374 }
375 }
376
377 // FIXME -- compute maxWidth as well. Not needed yet, so there's no
378 // point in computing it.
379 }
380
381
382 void wxHtmlTableCell::Layout(int w)
383 {
384 ComputeMinMaxWidths();
385
386 wxHtmlCell::Layout(w);
387
388 /*
389
390 WIDTH ADJUSTING :
391
392 */
393
394 if (m_WidthFloatUnits == wxHTML_UNITS_PERCENT)
395 {
396 if (m_WidthFloat < 0) m_Width = (100 + m_WidthFloat) * w / 100;
397 else m_Width = m_WidthFloat * w / 100;
398 }
399 else
400 {
401 if (m_WidthFloat < 0) m_Width = w + m_WidthFloat;
402 else m_Width = m_WidthFloat;
403 }
404
405
406 /*
407
408 LAYOUTING :
409
410 */
411
412 /* 1. setup columns widths: */
413 {
414 int wpix = m_Width - (m_NumCols + 1) * m_Spacing;
415 int i, j;
416
417 // 1a. setup fixed-width columns:
418 for (i = 0; i < m_NumCols; i++)
419 if (m_ColsInfo[i].units == wxHTML_UNITS_PIXELS)
420 {
421 m_ColsInfo[i].pixwidth = wxMax(m_ColsInfo[i].width,
422 m_ColsInfo[i].minWidth);
423 wpix -= m_ColsInfo[i].pixwidth;
424 }
425
426 // 1b. setup floating-width columns:
427 int wtemp = 0;
428 for (i = 0; i < m_NumCols; i++)
429 if ((m_ColsInfo[i].units == wxHTML_UNITS_PERCENT) && (m_ColsInfo[i].width != 0))
430 {
431 m_ColsInfo[i].pixwidth = wxMax(m_ColsInfo[i].width * wpix / 100,
432 m_ColsInfo[i].minWidth);
433 wtemp += m_ColsInfo[i].pixwidth;
434 }
435 wpix -= wtemp;
436
437 // 1c. setup defalut columns (no width specification supplied):
438 // NOTE! This algorithm doesn't conform to HTML standard : it assigns equal widths
439 // instead of optimal
440 for (i = j = 0; i < m_NumCols; i++)
441 if (m_ColsInfo[i].width == 0) j++;
442 for (i = 0; i < m_NumCols; i++)
443 if (m_ColsInfo[i].width == 0)
444 m_ColsInfo[i].pixwidth = wpix / j;
445 }
446
447 /* 2. compute positions of columns: */
448 {
449 int wpos = m_Spacing;
450 for (int i = 0; i < m_NumCols; i++)
451 {
452 m_ColsInfo[i].leftpos = wpos;
453 wpos += m_ColsInfo[i].pixwidth + m_Spacing;
454 }
455 }
456
457 /* 3. sub-layout all cells: */
458 {
459 int *ypos = new int[m_NumRows + 1];
460
461 int actcol, actrow;
462 int fullwid;
463 wxHtmlContainerCell *actcell;
464
465 ypos[0] = m_Spacing;
466 for (actrow = 1; actrow <= m_NumRows; actrow++) ypos[actrow] = -1;
467 for (actrow = 0; actrow < m_NumRows; actrow++)
468 {
469 if (ypos[actrow] == -1) ypos[actrow] = ypos[actrow-1];
470 // 3a. sub-layout and detect max height:
471
472 for (actcol = 0; actcol < m_NumCols; actcol++) {
473 if (m_CellInfo[actrow][actcol].flag != cellUsed) continue;
474 actcell = m_CellInfo[actrow][actcol].cont;
475 fullwid = 0;
476 for (int i = actcol; i < m_CellInfo[actrow][actcol].colspan + actcol; i++)
477 fullwid += m_ColsInfo[i].pixwidth;
478 fullwid += (m_CellInfo[actrow][actcol].colspan - 1) * m_Spacing;
479 actcell->SetMinHeight(m_CellInfo[actrow][actcol].minheight, m_CellInfo[actrow][actcol].valign);
480 actcell->Layout(fullwid);
481
482 if (ypos[actrow] + actcell->GetHeight() + m_CellInfo[actrow][actcol].rowspan * m_Spacing > ypos[actrow + m_CellInfo[actrow][actcol].rowspan])
483 ypos[actrow + m_CellInfo[actrow][actcol].rowspan] =
484 ypos[actrow] + actcell->GetHeight() + m_CellInfo[actrow][actcol].rowspan * m_Spacing;
485 }
486 }
487
488 for (actrow = 0; actrow < m_NumRows; actrow++)
489 {
490 // 3b. place cells in row & let'em all have same height:
491
492 for (actcol = 0; actcol < m_NumCols; actcol++)
493 {
494 if (m_CellInfo[actrow][actcol].flag != cellUsed) continue;
495 actcell = m_CellInfo[actrow][actcol].cont;
496 actcell->SetMinHeight(
497 ypos[actrow + m_CellInfo[actrow][actcol].rowspan] - ypos[actrow] - m_Spacing,
498 m_CellInfo[actrow][actcol].valign);
499 fullwid = 0;
500 for (int i = actcol; i < m_CellInfo[actrow][actcol].colspan + actcol; i++)
501 fullwid += m_ColsInfo[i].pixwidth;
502 fullwid += (m_CellInfo[actrow][actcol].colspan - 1) * m_Spacing;
503 actcell->Layout(fullwid);
504 actcell->SetPos(m_ColsInfo[actcol].leftpos, ypos[actrow]);
505 }
506 }
507 m_Height = ypos[m_NumRows];
508 delete[] ypos;
509 }
510 }
511
512
513
514
515
516
517 //-----------------------------------------------------------------------------
518 // The tables handler:
519 //-----------------------------------------------------------------------------
520
521
522 TAG_HANDLER_BEGIN(TABLE, "TABLE,TR,TD,TH")
523
524 TAG_HANDLER_VARS
525 wxHtmlTableCell* m_Table;
526 wxString m_tAlign, m_rAlign;
527
528 TAG_HANDLER_CONSTR(TABLE)
529 {
530 m_Table = NULL;
531 m_tAlign = m_rAlign = wxEmptyString;
532 }
533
534
535 TAG_HANDLER_PROC(tag)
536 {
537 wxHtmlContainerCell *c;
538
539 // new table started, backup upper-level table (if any) and create new:
540 if (tag.GetName() == wxT("TABLE"))
541 {
542 wxHtmlTableCell *oldt = m_Table;
543 wxHtmlContainerCell *oldcont;
544
545 oldcont = c = m_WParser->OpenContainer();
546
547 c->SetWidthFloat(tag, m_WParser->GetPixelScale());
548 m_Table = new wxHtmlTableCell(c, tag, m_WParser->GetPixelScale());
549 int oldAlign = m_WParser->GetAlign();
550 m_tAlign = wxEmptyString;
551 if (tag.HasParam(wxT("ALIGN")))
552 m_tAlign = tag.GetParam(wxT("ALIGN"));
553
554 ParseInner(tag);
555
556 m_WParser->SetAlign(oldAlign);
557 m_WParser->SetContainer(oldcont);
558 m_WParser->CloseContainer();
559
560 m_Table = oldt;
561 return TRUE;
562 }
563
564
565 else if (m_Table)
566 {
567 // new row in table
568 if (tag.GetName() == wxT("TR"))
569 {
570 m_Table->AddRow(tag);
571 m_rAlign = m_tAlign;
572 if (tag.HasParam(wxT("ALIGN")))
573 m_rAlign = tag.GetParam(wxT("ALIGN"));
574 }
575
576 // new cell
577 else
578 {
579 c = m_WParser->SetContainer(new wxHtmlContainerCell(m_Table));
580 m_Table->AddCell(c, tag);
581
582 m_WParser->OpenContainer();
583
584 if (tag.GetName() == wxT("TH")) /*header style*/
585 m_WParser->SetAlign(wxHTML_ALIGN_CENTER);
586 else
587 m_WParser->SetAlign(wxHTML_ALIGN_LEFT);
588
589 wxString als;
590
591 als = m_rAlign;
592 if (tag.HasParam(wxT("ALIGN")))
593 als = tag.GetParam(wxT("ALIGN"));
594 als.MakeUpper();
595 if (als == wxT("RIGHT"))
596 m_WParser->SetAlign(wxHTML_ALIGN_RIGHT);
597 else if (als == wxT("LEFT"))
598 m_WParser->SetAlign(wxHTML_ALIGN_LEFT);
599 else if (als == wxT("CENTER"))
600 m_WParser->SetAlign(wxHTML_ALIGN_CENTER);
601
602 m_WParser->OpenContainer();
603 }
604 }
605 return FALSE;
606 }
607
608 TAG_HANDLER_END(TABLE)
609
610
611
612
613
614 TAGS_MODULE_BEGIN(Tables)
615
616 TAGS_MODULE_ADD(TABLE)
617
618 TAGS_MODULE_END(Tables)
619
620
621 #endif