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[wxWidgets.git] / src / html / m_tables.cpp
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5526e819 1/////////////////////////////////////////////////////////////////////////////
c88293a4 2// Name: m_tables.cpp
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3// Purpose: wxHtml module for tables
4// Author: Vaclav Slavik
69941f05 5// RCS-ID: $Id$
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6// Copyright: (c) 1999 Vaclav Slavik
7// Licence: wxWindows Licence
8/////////////////////////////////////////////////////////////////////////////
9
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10#ifdef __GNUG__
11#pragma implementation
12#endif
13
3096bd2f 14#include "wx/wxprec.h"
3364ab79 15
314260fb 16#include "wx/defs.h"
f6bcfd97 17#if wxUSE_HTML && wxUSE_STREAMS
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18#ifdef __BORDLANDC__
19#pragma hdrstop
20#endif
21
22#ifndef WXPRECOMP
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23#endif
24
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25
26/*
27REMARKS:
c88293a4 28 1. This version of m_tables doesn't support auto-layout algorithm.
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29 This means that all columns are of same width unless explicitly specified.
30*/
31
32
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33#include "wx/html/forcelnk.h"
34#include "wx/html/m_templ.h"
5526e819 35
69941f05 36#include "wx/html/htmlcell.h"
5526e819 37
c88293a4 38FORCE_LINK_ME(m_tables)
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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
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50struct 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
63enum cellState
64{
65 cellSpan,
66 cellUsed,
67 cellFree
68};
69
70struct cellStruct
71{
72 wxHtmlContainerCell *cont;
73 int colspan, rowspan;
74 int minheight, valign;
75 cellState flag;
76};
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77
78
79class wxHtmlTableCell : public wxHtmlContainerCell
80{
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81protected:
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
97private:
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
110public:
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
118private:
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();
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128};
129
130
131
edbd0635 132wxHtmlTableCell::wxHtmlTableCell(wxHtmlContainerCell *parent, const wxHtmlTag& tag, double pixel_scale)
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133 : wxHtmlContainerCell(parent)
134{
edbd0635 135 m_PixelScale = pixel_scale;
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136 m_HasBorders =
137 (tag.HasParam(wxT("BORDER")) && tag.GetParam(wxT("BORDER")) != wxT("0"));
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138 m_ColsInfo = NULL;
139 m_NumCols = m_NumRows = 0;
140 m_CellInfo = NULL;
141 m_ActualCol = m_ActualRow = -1;
142
143 /* scan params: */
04dbb646 144 if (tag.HasParam(wxT("BGCOLOR")))
8bd72d90 145 tag.GetParamAsColour(wxT("BGCOLOR"), &m_tBkg);
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146 if (tag.HasParam(wxT("VALIGN")))
147 m_tValign = tag.GetParam(wxT("VALIGN"));
148 else
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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;
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154 m_Spacing = (int)(m_PixelScale * (double)m_Spacing);
155 m_Padding = (int)(m_PixelScale * (double)m_Padding);
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156
157 if (m_HasBorders)
158 SetBorder(TABLE_BORDER_CLR_1, TABLE_BORDER_CLR_2);
159}
160
161
162
163wxHtmlTableCell::~wxHtmlTableCell()
164{
165 if (m_ColsInfo) free(m_ColsInfo);
04dbb646 166 if (m_CellInfo)
4f9297b0 167 {
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168 for (int i = 0; i < m_NumRows; i++)
169 free(m_CellInfo[i]);
170 free(m_CellInfo);
171 }
172}
173
174
175
176void wxHtmlTableCell::ReallocCols(int cols)
177{
178 int i,j;
179
04dbb646 180 for (i = 0; i < m_NumRows; i++)
4f9297b0 181 {
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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);
04dbb646 188 for (j = m_NumCols; j < cols; j++)
4f9297b0 189 {
5526e819 190 m_ColsInfo[j].width = 0;
efba2b89 191 m_ColsInfo[j].units = wxHTML_UNITS_PERCENT;
79d6c018 192 m_ColsInfo[j].minWidth = m_ColsInfo[j].maxWidth = -1;
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193 }
194
195 m_NumCols = cols;
196}
197
198
199
200void wxHtmlTableCell::ReallocRows(int rows)
201{
202 m_CellInfo = (cellStruct**) realloc(m_CellInfo, sizeof(cellStruct*) * rows);
04dbb646 203 for (int row = m_NumRows; row < rows ; row++)
80eab469 204 {
04dbb646 205 if (m_NumCols == 0)
80eab469 206 m_CellInfo[row] = NULL;
04dbb646 207 else
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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 }
5526e819 213 }
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214 m_NumRows = rows;
215}
216
217
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218void wxHtmlTableCell::AddRow(const wxHtmlTag& tag)
219{
5526e819 220 m_ActualCol = -1;
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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.
5526e819 224
d361bbff 225 // scan params:
5526e819 226 m_rBkg = m_tBkg;
04dbb646 227 if (tag.HasParam(wxT("BGCOLOR")))
8bd72d90 228 tag.GetParamAsColour(wxT("BGCOLOR"), &m_rBkg);
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229 if (tag.HasParam(wxT("VALIGN")))
230 m_rValign = tag.GetParam(wxT("VALIGN"));
231 else
d361bbff 232 m_rValign = m_tValign;
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233}
234
235
236
237void wxHtmlTableCell::AddCell(wxHtmlContainerCell *cell, const wxHtmlTag& tag)
238{
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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:
04dbb646 249 do
4f9297b0 250 {
5526e819 251 m_ActualCol++;
04dbb646 252 } while ((m_ActualCol < m_NumCols) &&
8bd72d90 253 (m_CellInfo[m_ActualRow][m_ActualCol].flag != cellFree));
04dbb646 254
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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;
efba2b89 265 m_CellInfo[r][c].valign = wxHTML_ALIGN_TOP;
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266
267 /* scan for parameters: */
268
269 // width:
270 {
8bd72d90 271 if (tag.HasParam(wxT("WIDTH")))
2fa3b707 272 {
8bd72d90 273 wxString wd = tag.GetParam(wxT("WIDTH"));
5526e819 274
8bd72d90 275 if (wd[wd.Length()-1] == wxT('%'))
2fa3b707 276 {
66a77a74 277 wxSscanf(wd.c_str(), wxT("%i%%"), &m_ColsInfo[c].width);
efba2b89 278 m_ColsInfo[c].units = wxHTML_UNITS_PERCENT;
5526e819 279 }
04dbb646 280 else
2fa3b707 281 {
66a77a74 282 wxSscanf(wd.c_str(), wxT("%i"), &m_ColsInfo[c].width);
edbd0635 283 m_ColsInfo[c].width = (int)(m_PixelScale * (double)m_ColsInfo[c].width);
efba2b89 284 m_ColsInfo[c].units = wxHTML_UNITS_PIXELS;
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285 }
286 }
287 }
288
289
290 // spanning:
291 {
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292 tag.GetParamAsInt(wxT("COLSPAN"), &m_CellInfo[r][c].colspan);
293 tag.GetParamAsInt(wxT("ROWSPAN"), &m_CellInfo[r][c].rowspan);
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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))
2fa3b707 307 {
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308 int i, j;
309
04dbb646 310 if (r + m_CellInfo[r][c].rowspan > m_NumRows)
8bd72d90 311 ReallocRows(r + m_CellInfo[r][c].rowspan);
04dbb646 312 if (c + m_CellInfo[r][c].colspan > m_NumCols)
8bd72d90 313 ReallocCols(c + m_CellInfo[r][c].colspan);
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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 {
8bd72d90 323 wxColour bk = m_rBkg;
04dbb646 324 if (tag.HasParam(wxT("BGCOLOR")))
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325 tag.GetParamAsColour(wxT("BGCOLOR"), &bk);
326 if (bk.Ok())
327 cell->SetBackgroundColour(bk);
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328 }
329 if (m_HasBorders)
4f9297b0 330 cell->SetBorder(TABLE_BORDER_CLR_2, TABLE_BORDER_CLR_1);
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331
332 // vertical alignment:
333 {
334 wxString valign;
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335 if (tag.HasParam(wxT("VALIGN")))
336 valign = tag.GetParam(wxT("VALIGN"));
337 else
8bd72d90 338 valign = m_tValign;
5526e819 339 valign.MakeUpper();
04dbb646 340 if (valign == wxT("TOP"))
8bd72d90 341 m_CellInfo[r][c].valign = wxHTML_ALIGN_TOP;
04dbb646 342 else if (valign == wxT("BOTTOM"))
8bd72d90 343 m_CellInfo[r][c].valign = wxHTML_ALIGN_BOTTOM;
efba2b89 344 else m_CellInfo[r][c].valign = wxHTML_ALIGN_CENTER;
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345 }
346
4f9297b0 347 cell->SetIndent(m_Padding, wxHTML_INDENT_ALL, wxHTML_UNITS_PIXELS);
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348}
349
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350void wxHtmlTableCell::ComputeMinMaxWidths()
351{
352 if (m_NumCols == 0 || m_ColsInfo[0].minWidth != -1) return;
353
354 int left, right, width;
355
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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 {
026d1fac 363 cell.cont->Layout(2*m_Padding + 1);
79d6c018 364 cell.cont->GetHorizontalConstraints(&left, &right);
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365 width = right - left;
366 width -= (cell.colspan-1) * m_Spacing;
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367 // HTML 4.0 says it is acceptable to distribute min/max
368 // width of spanning cells evently
369 width /= cell.colspan;
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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}
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380
381
382void wxHtmlTableCell::Layout(int w)
383{
79d6c018 384 ComputeMinMaxWidths();
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385
386 wxHtmlCell::Layout(w);
79d6c018 387
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388 /*
389
390 WIDTH ADJUSTING :
391
392 */
393
04dbb646 394 if (m_WidthFloatUnits == wxHTML_UNITS_PERCENT)
4f9297b0 395 {
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396 if (m_WidthFloat < 0) m_Width = (100 + m_WidthFloat) * w / 100;
397 else m_Width = m_WidthFloat * w / 100;
398 }
04dbb646 399 else
4f9297b0 400 {
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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;
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416
417 // 1a. setup fixed-width columns:
418 for (i = 0; i < m_NumCols; i++)
efba2b89 419 if (m_ColsInfo[i].units == wxHTML_UNITS_PIXELS)
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420 {
421 m_ColsInfo[i].pixwidth = wxMax(m_ColsInfo[i].width,
422 m_ColsInfo[i].minWidth);
423 wpix -= m_ColsInfo[i].pixwidth;
424 }
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425
426 // 1b. setup floating-width columns:
79d6c018 427 int wtemp = 0;
5526e819 428 for (i = 0; i < m_NumCols; i++)
efba2b89 429 if ((m_ColsInfo[i].units == wxHTML_UNITS_PERCENT) && (m_ColsInfo[i].width != 0))
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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 }
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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;
04dbb646 450 for (int i = 0; i < m_NumCols; i++)
2fa3b707 451 {
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452 m_ColsInfo[i].leftpos = wpos;
453 wpos += m_ColsInfo[i].pixwidth + m_Spacing;
454 }
455 }
456
457 /* 3. sub-layout all cells: */
458 {
2776d7c3 459 int *ypos = new int[m_NumRows + 1];
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460
461 int actcol, actrow;
462 int fullwid;
463 wxHtmlContainerCell *actcell;
464
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465 ypos[0] = m_Spacing;
466 for (actrow = 1; actrow <= m_NumRows; actrow++) ypos[actrow] = -1;
04dbb646 467 for (actrow = 0; actrow < m_NumRows; actrow++)
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468 {
469 if (ypos[actrow] == -1) ypos[actrow] = ypos[actrow-1];
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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;
a97a264f 478 fullwid += (m_CellInfo[actrow][actcol].colspan - 1) * m_Spacing;
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479 actcell->SetMinHeight(m_CellInfo[actrow][actcol].minheight, m_CellInfo[actrow][actcol].valign);
480 actcell->Layout(fullwid);
5526e819 481
4f9297b0 482 if (ypos[actrow] + actcell->GetHeight() + m_CellInfo[actrow][actcol].rowspan * m_Spacing > ypos[actrow + m_CellInfo[actrow][actcol].rowspan])
5526e819 483 ypos[actrow + m_CellInfo[actrow][actcol].rowspan] =
4f9297b0 484 ypos[actrow] + actcell->GetHeight() + m_CellInfo[actrow][actcol].rowspan * m_Spacing;
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485 }
486 }
487
04dbb646 488 for (actrow = 0; actrow < m_NumRows; actrow++)
2fa3b707 489 {
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490 // 3b. place cells in row & let'em all have same height:
491
04dbb646 492 for (actcol = 0; actcol < m_NumCols; actcol++)
2fa3b707 493 {
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494 if (m_CellInfo[actrow][actcol].flag != cellUsed) continue;
495 actcell = m_CellInfo[actrow][actcol].cont;
4f9297b0 496 actcell->SetMinHeight(
a97a264f 497 ypos[actrow + m_CellInfo[actrow][actcol].rowspan] - ypos[actrow] - m_Spacing,
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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;
a97a264f 502 fullwid += (m_CellInfo[actrow][actcol].colspan - 1) * m_Spacing;
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503 actcell->Layout(fullwid);
504 actcell->SetPos(m_ColsInfo[actcol].leftpos, ypos[actrow]);
5526e819 505 }
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506 }
507 m_Height = ypos[m_NumRows];
2776d7c3 508 delete[] ypos;
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509 }
510}
511
512
513
514
515
516
517//-----------------------------------------------------------------------------
518// The tables handler:
519//-----------------------------------------------------------------------------
520
521
522TAG_HANDLER_BEGIN(TABLE, "TABLE,TR,TD,TH")
523
524 TAG_HANDLER_VARS
525 wxHtmlTableCell* m_Table;
526 wxString m_tAlign, m_rAlign;
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527
528 TAG_HANDLER_CONSTR(TABLE)
529 {
530 m_Table = NULL;
01325161 531 m_tAlign = m_rAlign = wxEmptyString;
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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:
04dbb646 540 if (tag.GetName() == wxT("TABLE"))
2fa3b707 541 {
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542 wxHtmlTableCell *oldt = m_Table;
543 wxHtmlContainerCell *oldcont;
5526e819 544
4f9297b0 545 oldcont = c = m_WParser->OpenContainer();
5526e819 546
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547 c->SetWidthFloat(tag, m_WParser->GetPixelScale());
548 m_Table = new wxHtmlTableCell(c, tag, m_WParser->GetPixelScale());
2755d437 549 int oldAlign = m_WParser->GetAlign();
5526e819 550 m_tAlign = wxEmptyString;
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551 if (tag.HasParam(wxT("ALIGN")))
552 m_tAlign = tag.GetParam(wxT("ALIGN"));
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553
554 ParseInner(tag);
555
2755d437 556 m_WParser->SetAlign(oldAlign);
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557 m_WParser->SetContainer(oldcont);
558 m_WParser->CloseContainer();
fbe77cea 559
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560 m_Table = oldt;
561 return TRUE;
562 }
563
564
211dfedd 565 else if (m_Table)
2fa3b707 566 {
5526e819 567 // new row in table
04dbb646 568 if (tag.GetName() == wxT("TR"))
2fa3b707 569 {
4f9297b0 570 m_Table->AddRow(tag);
5526e819 571 m_rAlign = m_tAlign;
04dbb646 572 if (tag.HasParam(wxT("ALIGN")))
8bd72d90 573 m_rAlign = tag.GetParam(wxT("ALIGN"));
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574 }
575
576 // new cell
04dbb646 577 else
2fa3b707 578 {
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579 c = m_WParser->SetContainer(new wxHtmlContainerCell(m_Table));
580 m_Table->AddCell(c, tag);
5526e819 581
4f9297b0 582 m_WParser->OpenContainer();
5526e819 583
04dbb646 584 if (tag.GetName() == wxT("TH")) /*header style*/
4f9297b0 585 m_WParser->SetAlign(wxHTML_ALIGN_CENTER);
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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
4f9297b0 602 m_WParser->OpenContainer();
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603 }
604 }
605 return FALSE;
606 }
607
608TAG_HANDLER_END(TABLE)
609
610
611
612
613
614TAGS_MODULE_BEGIN(Tables)
615
616 TAGS_MODULE_ADD(TABLE)
617
618TAGS_MODULE_END(Tables)
619
620
621#endif