improved HTML tables layout code (patch 911377)
[wxWidgets.git] / src / html / htmlcell.cpp
1 /////////////////////////////////////////////////////////////////////////////
2 // Name: htmlcell.cpp
3 // Purpose: wxHtmlCell - basic element of HTML output
4 // Author: Vaclav Slavik
5 // RCS-ID: $Id$
6 // Copyright: (c) 1999 Vaclav Slavik
7 // Licence: wxWindows Licence
8 /////////////////////////////////////////////////////////////////////////////
9
10 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
11 #pragma implementation "htmlcell.h"
12 #endif
13
14 #include "wx/wxprec.h"
15
16 #include "wx/defs.h"
17
18 #if wxUSE_HTML && wxUSE_STREAMS
19
20 #ifdef __BORLANDC__
21 #pragma hdrstop
22 #endif
23
24 #ifndef WXPRECOMP
25 #include "wx/brush.h"
26 #include "wx/colour.h"
27 #include "wx/dc.h"
28 #endif
29
30 #include "wx/html/htmlcell.h"
31 #include "wx/html/htmlwin.h"
32 #include "wx/settings.h"
33 #include "wx/module.h"
34 #include "wx/dynarray.h"
35
36 #include <stdlib.h>
37
38 //-----------------------------------------------------------------------------
39 // Global variables
40 //-----------------------------------------------------------------------------
41
42 static wxCursor *gs_cursorLink = NULL;
43 static wxCursor *gs_cursorText = NULL;
44
45
46 //-----------------------------------------------------------------------------
47 // Helper classes
48 //-----------------------------------------------------------------------------
49
50 void wxHtmlSelection::Set(const wxPoint& fromPos, const wxHtmlCell *fromCell,
51 const wxPoint& toPos, const wxHtmlCell *toCell)
52 {
53 m_fromCell = fromCell;
54 m_toCell = toCell;
55 m_fromPos = fromPos;
56 m_toPos = toPos;
57 }
58
59 void wxHtmlSelection::Set(const wxHtmlCell *fromCell, const wxHtmlCell *toCell)
60 {
61 wxPoint p1 = fromCell ? fromCell->GetAbsPos() : wxDefaultPosition;
62 wxPoint p2 = toCell ? toCell->GetAbsPos() : wxDefaultPosition;
63 if ( toCell )
64 {
65 p2.x += toCell->GetWidth();
66 p2.y += toCell->GetHeight();
67 }
68 Set(p1, fromCell, p2, toCell);
69 }
70
71 wxColour
72 wxDefaultHtmlRenderingStyle::
73 GetSelectedTextColour(const wxColour& WXUNUSED(clr))
74 {
75 return wxSystemSettings::GetColour(wxSYS_COLOUR_HIGHLIGHTTEXT);
76 }
77
78 wxColour
79 wxDefaultHtmlRenderingStyle::
80 GetSelectedTextBgColour(const wxColour& WXUNUSED(clr))
81 {
82 return wxSystemSettings::GetColour(wxSYS_COLOUR_HIGHLIGHT);
83 }
84
85
86 //-----------------------------------------------------------------------------
87 // wxHtmlCell
88 //-----------------------------------------------------------------------------
89
90 IMPLEMENT_ABSTRACT_CLASS(wxHtmlCell, wxObject)
91
92 wxHtmlCell::wxHtmlCell() : wxObject()
93 {
94 m_Next = NULL;
95 m_Parent = NULL;
96 m_Width = m_Height = m_Descent = 0;
97 m_CanLiveOnPagebreak = TRUE;
98 m_Link = NULL;
99 }
100
101 wxHtmlCell::~wxHtmlCell()
102 {
103 delete m_Link;
104 }
105
106
107 void wxHtmlCell::OnMouseClick(wxWindow *parent, int x, int y,
108 const wxMouseEvent& event)
109 {
110 wxHtmlLinkInfo *lnk = GetLink(x, y);
111 if (lnk != NULL)
112 {
113 wxHtmlLinkInfo lnk2(*lnk);
114 lnk2.SetEvent(&event);
115 lnk2.SetHtmlCell(this);
116
117 // note : this cast is legal because parent is *always* wxHtmlWindow
118 wxStaticCast(parent, wxHtmlWindow)->OnLinkClicked(lnk2);
119 }
120 }
121
122
123 wxCursor wxHtmlCell::GetCursor() const
124 {
125 if ( GetLink() )
126 {
127 if ( !gs_cursorLink )
128 gs_cursorLink = new wxCursor(wxCURSOR_HAND);
129 return *gs_cursorLink;
130 }
131 else
132 return *wxSTANDARD_CURSOR;
133 }
134
135
136 bool wxHtmlCell::AdjustPagebreak(int *pagebreak, int* WXUNUSED(known_pagebreaks), int WXUNUSED(number_of_pages)) const
137 {
138 if ((!m_CanLiveOnPagebreak) &&
139 m_PosY < *pagebreak && m_PosY + m_Height > *pagebreak)
140 {
141 *pagebreak = m_PosY;
142 return TRUE;
143 }
144
145 return FALSE;
146 }
147
148
149
150 void wxHtmlCell::SetLink(const wxHtmlLinkInfo& link)
151 {
152 if (m_Link) delete m_Link;
153 m_Link = NULL;
154 if (link.GetHref() != wxEmptyString)
155 m_Link = new wxHtmlLinkInfo(link);
156 }
157
158
159 void wxHtmlCell::Layout(int WXUNUSED(w))
160 {
161 SetPos(0, 0);
162 }
163
164
165
166 const wxHtmlCell* wxHtmlCell::Find(int WXUNUSED(condition), const void* WXUNUSED(param)) const
167 {
168 return NULL;
169 }
170
171
172 wxHtmlCell *wxHtmlCell::FindCellByPos(wxCoord x, wxCoord y,
173 unsigned flags) const
174 {
175 if ( x >= 0 && x < m_Width && y >= 0 && y < m_Height )
176 {
177 return wxConstCast(this, wxHtmlCell);
178 }
179 else
180 {
181 if ((flags & wxHTML_FIND_NEAREST_AFTER) &&
182 (y < 0 || (y < 0+m_Height && x < 0+m_Width)))
183 return wxConstCast(this, wxHtmlCell);
184 else if ((flags & wxHTML_FIND_NEAREST_BEFORE) &&
185 (y >= 0+m_Height || (y >= 0 && x >= 0)))
186 return wxConstCast(this, wxHtmlCell);
187 else
188 return NULL;
189 }
190 }
191
192
193 wxPoint wxHtmlCell::GetAbsPos() const
194 {
195 wxPoint p(m_PosX, m_PosY);
196 for (wxHtmlCell *parent = m_Parent; parent; parent = parent->m_Parent)
197 {
198 p.x += parent->m_PosX;
199 p.y += parent->m_PosY;
200 }
201 return p;
202 }
203
204 unsigned wxHtmlCell::GetDepth() const
205 {
206 unsigned d = 0;
207 for (wxHtmlCell *p = m_Parent; p; p = p->m_Parent)
208 d++;
209 return d;
210 }
211
212 bool wxHtmlCell::IsBefore(wxHtmlCell *cell) const
213 {
214 const wxHtmlCell *c1 = this;
215 const wxHtmlCell *c2 = cell;
216 unsigned d1 = GetDepth();
217 unsigned d2 = cell->GetDepth();
218
219 if ( d1 > d2 )
220 for (; d1 != d2; d1-- )
221 c1 = c1->m_Parent;
222 else if ( d1 < d2 )
223 for (; d1 != d2; d2-- )
224 c2 = c2->m_Parent;
225
226 if ( cell == this )
227 return true;
228
229 while ( c1 && c2 )
230 {
231 if ( c1->m_Parent == c2->m_Parent )
232 {
233 while ( c1 )
234 {
235 if ( c1 == c2 )
236 return true;
237 c1 = c1->GetNext();
238 }
239 return false;
240 }
241 else
242 {
243 c1 = c1->m_Parent;
244 c2 = c2->m_Parent;
245 }
246 }
247
248 wxFAIL_MSG(_T("Cells are in different trees"));
249 return false;
250 }
251
252
253 //-----------------------------------------------------------------------------
254 // wxHtmlWordCell
255 //-----------------------------------------------------------------------------
256
257 IMPLEMENT_ABSTRACT_CLASS(wxHtmlWordCell, wxHtmlCell)
258
259 wxHtmlWordCell::wxHtmlWordCell(const wxString& word, wxDC& dc) : wxHtmlCell()
260 {
261 m_Word = word;
262 dc.GetTextExtent(m_Word, &m_Width, &m_Height, &m_Descent);
263 SetCanLiveOnPagebreak(FALSE);
264 m_allowLinebreak = true;
265 }
266
267 void wxHtmlWordCell::SetPreviousWord(wxHtmlWordCell *cell)
268 {
269 if ( cell && m_Parent == cell->m_Parent &&
270 !wxIsspace(cell->m_Word.Last()) && !wxIsspace(m_Word[0u]) )
271 {
272 m_allowLinebreak = false;
273 }
274 }
275
276 // Splits m_Word into up to three parts according to selection, returns
277 // substring before, in and after selection and the points (in relative coords)
278 // where s2 and s3 start:
279 void wxHtmlWordCell::Split(wxDC& dc,
280 const wxPoint& selFrom, const wxPoint& selTo,
281 unsigned& pos1, unsigned& pos2) const
282 {
283 wxPoint pt1 = (selFrom == wxDefaultPosition) ?
284 wxDefaultPosition : selFrom - GetAbsPos();
285 wxPoint pt2 = (selTo == wxDefaultPosition) ?
286 wxPoint(m_Width, -1) : selTo - GetAbsPos();
287
288 wxCoord charW, charH;
289 unsigned len = m_Word.length();
290 unsigned i = 0;
291 pos1 = 0;
292
293 // adjust for cases when the start/end position is completely
294 // outside the cell:
295 if ( pt1.y < 0 )
296 pt1.x = 0;
297 if ( pt2.y >= m_Height )
298 pt2.x = m_Width;
299
300 // before selection:
301 while ( pt1.x > 0 && i < len )
302 {
303 dc.GetTextExtent(m_Word[i], &charW, &charH);
304 pt1.x -= charW;
305 if ( pt1.x >= 0 )
306 {
307 pos1 += charW;
308 i++;
309 }
310 }
311
312 // in selection:
313 unsigned j = i;
314 pos2 = pos1;
315 pt2.x -= pos2;
316 while ( pt2.x > 0 && j < len )
317 {
318 dc.GetTextExtent(m_Word[j], &charW, &charH);
319 pt2.x -= charW;
320 if ( pt2.x >= 0 )
321 {
322 pos2 += charW;
323 j++;
324 }
325 }
326
327 pos1 = i;
328 pos2 = j;
329 }
330
331 void wxHtmlWordCell::SetSelectionPrivPos(wxDC& dc, wxHtmlSelection *s) const
332 {
333 unsigned p1, p2;
334
335 Split(dc,
336 this == s->GetFromCell() ? s->GetFromPos() : wxDefaultPosition,
337 this == s->GetToCell() ? s->GetToPos() : wxDefaultPosition,
338 p1, p2);
339
340 wxPoint p(0, m_Word.length());
341
342 if ( this == s->GetFromCell() )
343 p.x = p1; // selection starts here
344 if ( this == s->GetToCell() )
345 p.y = p2; // selection ends here
346
347 if ( this == s->GetFromCell() )
348 s->SetFromPrivPos(p);
349 if ( this == s->GetToCell() )
350 s->SetToPrivPos(p);
351 }
352
353
354 static void SwitchSelState(wxDC& dc, wxHtmlRenderingInfo& info,
355 bool toSelection)
356 {
357 wxColour fg = info.GetState().GetFgColour();
358 wxColour bg = info.GetState().GetBgColour();
359
360 if ( toSelection )
361 {
362 dc.SetBackgroundMode(wxSOLID);
363 dc.SetTextForeground(info.GetStyle().GetSelectedTextColour(fg));
364 dc.SetTextBackground(info.GetStyle().GetSelectedTextBgColour(bg));
365 dc.SetBackground(wxBrush(info.GetStyle().GetSelectedTextBgColour(bg),
366 wxSOLID));
367 }
368 else
369 {
370 dc.SetBackgroundMode(wxTRANSPARENT);
371 dc.SetTextForeground(fg);
372 dc.SetTextBackground(bg);
373 dc.SetBackground(wxBrush(bg, wxSOLID));
374 }
375 }
376
377
378 void wxHtmlWordCell::Draw(wxDC& dc, int x, int y,
379 int WXUNUSED(view_y1), int WXUNUSED(view_y2),
380 wxHtmlRenderingInfo& info)
381 {
382 #if 0 // useful for debugging
383 dc.SetPen(*wxBLACK_PEN);
384 dc.DrawRectangle(x+m_PosX,y+m_PosY,m_Width,m_Height);
385 #endif
386
387 bool drawSelectionAfterCell = false;
388
389 if ( info.GetState().GetSelectionState() == wxHTML_SEL_CHANGING )
390 {
391 // Selection changing, we must draw the word piecewise:
392 wxHtmlSelection *s = info.GetSelection();
393 wxString txt;
394 int w, h;
395 int ofs = 0;
396
397 wxPoint priv = (this == s->GetFromCell()) ?
398 s->GetFromPrivPos() : s->GetToPrivPos();
399
400 // NB: this is quite a hack: in order to compute selection boundaries
401 // (in word's characters) we must know current font, which is only
402 // possible inside rendering code. Therefore we update the
403 // information here and store it in wxHtmlSelection so that
404 // ConvertToText can use it later:
405 if ( priv == wxDefaultPosition )
406 {
407 SetSelectionPrivPos(dc, s);
408 priv = (this == s->GetFromCell()) ?
409 s->GetFromPrivPos() : s->GetToPrivPos();
410 }
411
412 int part1 = priv.x;
413 int part2 = priv.y;
414
415 if ( part1 > 0 )
416 {
417 txt = m_Word.Mid(0, part1);
418 dc.DrawText(txt, x + m_PosX, y + m_PosY);
419 dc.GetTextExtent(txt, &w, &h);
420 ofs += w;
421 }
422
423 SwitchSelState(dc, info, true);
424
425 txt = m_Word.Mid(part1, part2-part1);
426 dc.DrawText(txt, ofs + x + m_PosX, y + m_PosY);
427
428 if ( (size_t)part2 < m_Word.length() )
429 {
430 dc.GetTextExtent(txt, &w, &h);
431 ofs += w;
432 SwitchSelState(dc, info, false);
433 txt = m_Word.Mid(part2);
434 dc.DrawText(txt, ofs + x + m_PosX, y + m_PosY);
435 }
436 else
437 drawSelectionAfterCell = true;
438 }
439 else
440 {
441 wxHtmlSelectionState selstate = info.GetState().GetSelectionState();
442 // Not changing selection state, draw the word in single mode:
443 if ( selstate != wxHTML_SEL_OUT &&
444 dc.GetBackgroundMode() != wxSOLID )
445 {
446 SwitchSelState(dc, info, true);
447 }
448 else if ( selstate == wxHTML_SEL_OUT &&
449 dc.GetBackgroundMode() == wxSOLID )
450 {
451 SwitchSelState(dc, info, false);
452 }
453 dc.DrawText(m_Word, x + m_PosX, y + m_PosY);
454 drawSelectionAfterCell = (selstate != wxHTML_SEL_OUT);
455 }
456
457 // NB: If the text is justified then there is usually some free space
458 // between adjacent cells and drawing the selection only onto cells
459 // would result in ugly unselected spaces. The code below detects
460 // this special case and renders the selection *outside* the sell,
461 // too.
462 if ( m_Parent->GetAlignHor() == wxHTML_ALIGN_JUSTIFY &&
463 drawSelectionAfterCell )
464 {
465 wxHtmlCell *nextCell = m_Next;
466 while ( nextCell && nextCell->IsFormattingCell() )
467 nextCell = nextCell->GetNext();
468 if ( nextCell )
469 {
470 int nextX = nextCell->GetPosX();
471 if ( m_PosX + m_Width < nextX )
472 {
473 dc.SetBrush(dc.GetBackground());
474 dc.SetPen(*wxTRANSPARENT_PEN);
475 dc.DrawRectangle(x + m_PosX + m_Width, y + m_PosY,
476 nextX - m_PosX - m_Width, m_Height);
477 }
478 }
479 }
480 }
481
482
483 wxString wxHtmlWordCell::ConvertToText(wxHtmlSelection *s) const
484 {
485 if ( s && (this == s->GetFromCell() || this == s->GetToCell()) )
486 {
487 wxPoint priv = this == s->GetFromCell() ? s->GetFromPrivPos()
488 : s->GetToPrivPos();
489
490 // VZ: we may be called before we had a chance to re-render ourselves
491 // and in this case GetFrom/ToPrivPos() is not set yet -- assume
492 // that this only happens in case of a double/triple click (which
493 // seems to be the case now) and so it makes sense to select the
494 // entire contents of the cell in this case
495 //
496 // TODO: but this really needs to be fixed in some better way later...
497 if ( priv != wxDefaultPosition )
498 {
499 int part1 = priv.x;
500 int part2 = priv.y;
501 return m_Word.Mid(part1, part2-part1);
502 }
503 //else: return the whole word below
504 }
505
506 return m_Word;
507 }
508
509 wxCursor wxHtmlWordCell::GetCursor() const
510 {
511 if ( !GetLink() )
512 {
513 if ( !gs_cursorText )
514 gs_cursorText = new wxCursor(wxCURSOR_IBEAM);
515 return *gs_cursorText;
516 }
517 else
518 return wxHtmlCell::GetCursor();
519 }
520
521
522 //-----------------------------------------------------------------------------
523 // wxHtmlContainerCell
524 //-----------------------------------------------------------------------------
525
526 IMPLEMENT_ABSTRACT_CLASS(wxHtmlContainerCell, wxHtmlCell)
527
528 wxHtmlContainerCell::wxHtmlContainerCell(wxHtmlContainerCell *parent) : wxHtmlCell()
529 {
530 m_Cells = m_LastCell = NULL;
531 m_Parent = parent;
532 m_MaxTotalWidth = 0;
533 if (m_Parent) m_Parent->InsertCell(this);
534 m_AlignHor = wxHTML_ALIGN_LEFT;
535 m_AlignVer = wxHTML_ALIGN_BOTTOM;
536 m_IndentLeft = m_IndentRight = m_IndentTop = m_IndentBottom = 0;
537 m_WidthFloat = 100; m_WidthFloatUnits = wxHTML_UNITS_PERCENT;
538 m_UseBkColour = FALSE;
539 m_UseBorder = FALSE;
540 m_MinHeight = 0;
541 m_MinHeightAlign = wxHTML_ALIGN_TOP;
542 m_LastLayout = -1;
543 }
544
545 wxHtmlContainerCell::~wxHtmlContainerCell()
546 {
547 wxHtmlCell *cell = m_Cells;
548 while ( cell )
549 {
550 wxHtmlCell *cellNext = cell->GetNext();
551 delete cell;
552 cell = cellNext;
553 }
554 }
555
556
557
558 void wxHtmlContainerCell::SetIndent(int i, int what, int units)
559 {
560 int val = (units == wxHTML_UNITS_PIXELS) ? i : -i;
561 if (what & wxHTML_INDENT_LEFT) m_IndentLeft = val;
562 if (what & wxHTML_INDENT_RIGHT) m_IndentRight = val;
563 if (what & wxHTML_INDENT_TOP) m_IndentTop = val;
564 if (what & wxHTML_INDENT_BOTTOM) m_IndentBottom = val;
565 m_LastLayout = -1;
566 }
567
568
569
570 int wxHtmlContainerCell::GetIndent(int ind) const
571 {
572 if (ind & wxHTML_INDENT_LEFT) return m_IndentLeft;
573 else if (ind & wxHTML_INDENT_RIGHT) return m_IndentRight;
574 else if (ind & wxHTML_INDENT_TOP) return m_IndentTop;
575 else if (ind & wxHTML_INDENT_BOTTOM) return m_IndentBottom;
576 else return -1; /* BUG! Should not be called... */
577 }
578
579
580
581
582 int wxHtmlContainerCell::GetIndentUnits(int ind) const
583 {
584 bool p = FALSE;
585 if (ind & wxHTML_INDENT_LEFT) p = m_IndentLeft < 0;
586 else if (ind & wxHTML_INDENT_RIGHT) p = m_IndentRight < 0;
587 else if (ind & wxHTML_INDENT_TOP) p = m_IndentTop < 0;
588 else if (ind & wxHTML_INDENT_BOTTOM) p = m_IndentBottom < 0;
589 if (p) return wxHTML_UNITS_PERCENT;
590 else return wxHTML_UNITS_PIXELS;
591 }
592
593
594
595 bool wxHtmlContainerCell::AdjustPagebreak(int *pagebreak, int* known_pagebreaks, int number_of_pages) const
596 {
597 if (!m_CanLiveOnPagebreak)
598 return wxHtmlCell::AdjustPagebreak(pagebreak, known_pagebreaks, number_of_pages);
599
600 else
601 {
602 wxHtmlCell *c = GetFirstChild();
603 bool rt = FALSE;
604 int pbrk = *pagebreak - m_PosY;
605
606 while (c)
607 {
608 if (c->AdjustPagebreak(&pbrk, known_pagebreaks, number_of_pages))
609 rt = TRUE;
610 c = c->GetNext();
611 }
612 if (rt)
613 *pagebreak = pbrk + m_PosY;
614 return rt;
615 }
616 }
617
618
619
620 void wxHtmlContainerCell::Layout(int w)
621 {
622 wxHtmlCell::Layout(w);
623
624 if (m_LastLayout == w) return;
625
626 // VS: Any attempt to layout with negative or zero width leads to hell,
627 // but we can't ignore such attempts completely, since it sometimes
628 // happen (e.g. when trying how small a table can be). The best thing we
629 // can do is to set the width of child cells to zero
630 if (w < 1)
631 {
632 m_Width = 0;
633 for (wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext())
634 cell->Layout(0);
635 // this does two things: it recursively calls this code on all
636 // child contrainers and resets children's position to (0,0)
637 return;
638 }
639
640 wxHtmlCell *cell = m_Cells, *line = m_Cells;
641 wxHtmlCell *nextCell;
642 long xpos = 0, ypos = m_IndentTop;
643 int xdelta = 0, ybasicpos = 0, ydiff;
644 int s_width, nextWordWidth, s_indent;
645 int ysizeup = 0, ysizedown = 0;
646 int MaxLineWidth = 0;
647 int xcnt = 0;
648 int curLineWidth = 0;
649 m_MaxTotalWidth = 0;
650
651
652 /*
653
654 WIDTH ADJUSTING :
655
656 */
657
658 if (m_WidthFloatUnits == wxHTML_UNITS_PERCENT)
659 {
660 if (m_WidthFloat < 0) m_Width = (100 + m_WidthFloat) * w / 100;
661 else m_Width = m_WidthFloat * w / 100;
662 }
663 else
664 {
665 if (m_WidthFloat < 0) m_Width = w + m_WidthFloat;
666 else m_Width = m_WidthFloat;
667 }
668
669 if (m_Cells)
670 {
671 int l = (m_IndentLeft < 0) ? (-m_IndentLeft * m_Width / 100) : m_IndentLeft;
672 int r = (m_IndentRight < 0) ? (-m_IndentRight * m_Width / 100) : m_IndentRight;
673 for (wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext())
674 cell->Layout(m_Width - (l + r));
675 }
676
677 /*
678
679 LAYOUTING :
680
681 */
682
683 // adjust indentation:
684 s_indent = (m_IndentLeft < 0) ? (-m_IndentLeft * m_Width / 100) : m_IndentLeft;
685 s_width = m_Width - s_indent - ((m_IndentRight < 0) ? (-m_IndentRight * m_Width / 100) : m_IndentRight);
686
687 // my own layouting:
688 while (cell != NULL)
689 {
690 switch (m_AlignVer)
691 {
692 case wxHTML_ALIGN_TOP : ybasicpos = 0; break;
693 case wxHTML_ALIGN_BOTTOM : ybasicpos = - cell->GetHeight(); break;
694 case wxHTML_ALIGN_CENTER : ybasicpos = - cell->GetHeight() / 2; break;
695 }
696 ydiff = cell->GetHeight() + ybasicpos;
697
698 if (cell->GetDescent() + ydiff > ysizedown) ysizedown = cell->GetDescent() + ydiff;
699 if (ybasicpos + cell->GetDescent() < -ysizeup) ysizeup = - (ybasicpos + cell->GetDescent());
700
701 // layout nonbreakable run of cells:
702 cell->SetPos(xpos, ybasicpos + cell->GetDescent());
703 xpos += cell->GetWidth();
704 if (!cell->IsTerminalCell())
705 {
706 // Container cell indicates new line
707 if (curLineWidth > m_MaxTotalWidth)
708 m_MaxTotalWidth = curLineWidth;
709
710 if (wxMax(cell->GetWidth(), cell->GetMaxTotalWidth()) > m_MaxTotalWidth)
711 m_MaxTotalWidth = cell->GetMaxTotalWidth();
712 curLineWidth = 0;
713 }
714 else
715 // Normal cell, add maximum cell width to line width
716 curLineWidth += cell->GetMaxTotalWidth();
717
718 cell = cell->GetNext();
719 xcnt++;
720
721 // compute length of the next word that would be added:
722 nextWordWidth = 0;
723 if (cell)
724 {
725 nextCell = cell;
726 do
727 {
728 nextWordWidth += nextCell->GetWidth();
729 nextCell = nextCell->GetNext();
730 } while (nextCell && !nextCell->IsLinebreakAllowed());
731 }
732
733 // force new line if occured:
734 if ((cell == NULL) ||
735 (xpos + nextWordWidth > s_width && cell->IsLinebreakAllowed()))
736 {
737 if (xpos > MaxLineWidth) MaxLineWidth = xpos;
738 if (ysizeup < 0) ysizeup = 0;
739 if (ysizedown < 0) ysizedown = 0;
740 switch (m_AlignHor) {
741 case wxHTML_ALIGN_LEFT :
742 case wxHTML_ALIGN_JUSTIFY :
743 xdelta = 0;
744 break;
745 case wxHTML_ALIGN_RIGHT :
746 xdelta = 0 + (s_width - xpos);
747 break;
748 case wxHTML_ALIGN_CENTER :
749 xdelta = 0 + (s_width - xpos) / 2;
750 break;
751 }
752 if (xdelta < 0) xdelta = 0;
753 xdelta += s_indent;
754
755 ypos += ysizeup;
756
757 if (m_AlignHor != wxHTML_ALIGN_JUSTIFY || cell == NULL)
758 while (line != cell)
759 {
760 line->SetPos(line->GetPosX() + xdelta,
761 ypos + line->GetPosY());
762 line = line->GetNext();
763 }
764 else
765 {
766 int counter = 0;
767 int step = (s_width - xpos);
768 if (step < 0) step = 0;
769 xcnt--;
770 if (xcnt > 0) while (line != cell)
771 {
772 line->SetPos(line->GetPosX() + s_indent +
773 (counter++ * step / xcnt),
774 ypos + line->GetPosY());
775 line = line->GetNext();
776 }
777 }
778
779 ypos += ysizedown;
780 xpos = xcnt = 0;
781 ysizeup = ysizedown = 0;
782 line = cell;
783 }
784 }
785
786 // setup height & width, depending on container layout:
787 m_Height = ypos + (ysizedown + ysizeup) + m_IndentBottom;
788
789 if (m_Height < m_MinHeight)
790 {
791 if (m_MinHeightAlign != wxHTML_ALIGN_TOP)
792 {
793 int diff = m_MinHeight - m_Height;
794 if (m_MinHeightAlign == wxHTML_ALIGN_CENTER) diff /= 2;
795 cell = m_Cells;
796 while (cell)
797 {
798 cell->SetPos(cell->GetPosX(), cell->GetPosY() + diff);
799 cell = cell->GetNext();
800 }
801 }
802 m_Height = m_MinHeight;
803 }
804
805 if (curLineWidth > m_MaxTotalWidth)
806 m_MaxTotalWidth = curLineWidth;
807
808 m_MaxTotalWidth += s_indent + ((m_IndentRight < 0) ? (-m_IndentRight * m_Width / 100) : m_IndentRight);
809 MaxLineWidth += s_indent + ((m_IndentRight < 0) ? (-m_IndentRight * m_Width / 100) : m_IndentRight);
810 if (m_Width < MaxLineWidth) m_Width = MaxLineWidth;
811
812 m_LastLayout = w;
813 }
814
815 void wxHtmlContainerCell::UpdateRenderingStatePre(wxHtmlRenderingInfo& info,
816 wxHtmlCell *cell) const
817 {
818 wxHtmlSelection *s = info.GetSelection();
819 if (!s) return;
820 if (s->GetFromCell() == cell || s->GetToCell() == cell)
821 {
822 info.GetState().SetSelectionState(wxHTML_SEL_CHANGING);
823 }
824 }
825
826 void wxHtmlContainerCell::UpdateRenderingStatePost(wxHtmlRenderingInfo& info,
827 wxHtmlCell *cell) const
828 {
829 wxHtmlSelection *s = info.GetSelection();
830 if (!s) return;
831 if (s->GetToCell() == cell)
832 info.GetState().SetSelectionState(wxHTML_SEL_OUT);
833 else if (s->GetFromCell() == cell)
834 info.GetState().SetSelectionState(wxHTML_SEL_IN);
835 }
836
837 #define mMin(a, b) (((a) < (b)) ? (a) : (b))
838 #define mMax(a, b) (((a) < (b)) ? (b) : (a))
839
840 void wxHtmlContainerCell::Draw(wxDC& dc, int x, int y, int view_y1, int view_y2,
841 wxHtmlRenderingInfo& info)
842 {
843 #if 0 // useful for debugging
844 dc.SetPen(*wxRED_PEN);
845 dc.DrawRectangle(x+m_PosX,y+m_PosY,m_Width,m_Height);
846 #endif
847 // container visible, draw it:
848 if ((y + m_PosY <= view_y2) && (y + m_PosY + m_Height > view_y1))
849 {
850 if (m_UseBkColour)
851 {
852 wxBrush myb = wxBrush(m_BkColour, wxSOLID);
853
854 int real_y1 = mMax(y + m_PosY, view_y1);
855 int real_y2 = mMin(y + m_PosY + m_Height - 1, view_y2);
856
857 dc.SetBrush(myb);
858 dc.SetPen(*wxTRANSPARENT_PEN);
859 dc.DrawRectangle(x + m_PosX, real_y1, m_Width, real_y2 - real_y1 + 1);
860 }
861
862 if (m_UseBorder)
863 {
864 wxPen mypen1(m_BorderColour1, 1, wxSOLID);
865 wxPen mypen2(m_BorderColour2, 1, wxSOLID);
866
867 dc.SetPen(mypen1);
868 dc.DrawLine(x + m_PosX, y + m_PosY, x + m_PosX, y + m_PosY + m_Height - 1);
869 dc.DrawLine(x + m_PosX, y + m_PosY, x + m_PosX + m_Width, y + m_PosY);
870 dc.SetPen(mypen2);
871 dc.DrawLine(x + m_PosX + m_Width - 1, y + m_PosY, x + m_PosX + m_Width - 1, y + m_PosY + m_Height - 1);
872 dc.DrawLine(x + m_PosX, y + m_PosY + m_Height - 1, x + m_PosX + m_Width, y + m_PosY + m_Height - 1);
873 }
874
875 if (m_Cells)
876 {
877 // draw container's contents:
878 for (wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext())
879 {
880 UpdateRenderingStatePre(info, cell);
881 cell->Draw(dc,
882 x + m_PosX, y + m_PosY, view_y1, view_y2,
883 info);
884 UpdateRenderingStatePost(info, cell);
885 }
886 }
887 }
888 // container invisible, just proceed font+color changing:
889 else
890 {
891 DrawInvisible(dc, x, y, info);
892 }
893 }
894
895
896
897 void wxHtmlContainerCell::DrawInvisible(wxDC& dc, int x, int y,
898 wxHtmlRenderingInfo& info)
899 {
900 if (m_Cells)
901 {
902 for (wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext())
903 {
904 UpdateRenderingStatePre(info, cell);
905 cell->DrawInvisible(dc, x + m_PosX, y + m_PosY, info);
906 UpdateRenderingStatePost(info, cell);
907 }
908 }
909 }
910
911
912 wxColour wxHtmlContainerCell::GetBackgroundColour()
913 {
914 if (m_UseBkColour)
915 return m_BkColour;
916 else
917 return wxNullColour;
918 }
919
920
921
922 wxHtmlLinkInfo *wxHtmlContainerCell::GetLink(int x, int y) const
923 {
924 wxHtmlCell *cell = FindCellByPos(x, y);
925
926 // VZ: I don't know if we should pass absolute or relative coords to
927 // wxHtmlCell::GetLink()? As the base class version just ignores them
928 // anyhow, it hardly matters right now but should still be clarified
929 return cell ? cell->GetLink(x, y) : NULL;
930 }
931
932
933
934 void wxHtmlContainerCell::InsertCell(wxHtmlCell *f)
935 {
936 if (!m_Cells) m_Cells = m_LastCell = f;
937 else
938 {
939 m_LastCell->SetNext(f);
940 m_LastCell = f;
941 if (m_LastCell) while (m_LastCell->GetNext()) m_LastCell = m_LastCell->GetNext();
942 }
943 f->SetParent(this);
944 m_LastLayout = -1;
945 }
946
947
948
949 void wxHtmlContainerCell::SetAlign(const wxHtmlTag& tag)
950 {
951 if (tag.HasParam(wxT("ALIGN")))
952 {
953 wxString alg = tag.GetParam(wxT("ALIGN"));
954 alg.MakeUpper();
955 if (alg == wxT("CENTER"))
956 SetAlignHor(wxHTML_ALIGN_CENTER);
957 else if (alg == wxT("LEFT"))
958 SetAlignHor(wxHTML_ALIGN_LEFT);
959 else if (alg == wxT("JUSTIFY"))
960 SetAlignHor(wxHTML_ALIGN_JUSTIFY);
961 else if (alg == wxT("RIGHT"))
962 SetAlignHor(wxHTML_ALIGN_RIGHT);
963 m_LastLayout = -1;
964 }
965 }
966
967
968
969 void wxHtmlContainerCell::SetWidthFloat(const wxHtmlTag& tag, double pixel_scale)
970 {
971 if (tag.HasParam(wxT("WIDTH")))
972 {
973 int wdi;
974 wxString wd = tag.GetParam(wxT("WIDTH"));
975
976 if (wd[wd.Length()-1] == wxT('%'))
977 {
978 wxSscanf(wd.c_str(), wxT("%i%%"), &wdi);
979 SetWidthFloat(wdi, wxHTML_UNITS_PERCENT);
980 }
981 else
982 {
983 wxSscanf(wd.c_str(), wxT("%i"), &wdi);
984 SetWidthFloat((int)(pixel_scale * (double)wdi), wxHTML_UNITS_PIXELS);
985 }
986 m_LastLayout = -1;
987 }
988 }
989
990
991
992 const wxHtmlCell* wxHtmlContainerCell::Find(int condition, const void* param) const
993 {
994 if (m_Cells)
995 {
996 for (wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext())
997 {
998 const wxHtmlCell *r = cell->Find(condition, param);
999 if (r) return r;
1000 }
1001 }
1002 return NULL;
1003 }
1004
1005
1006 wxHtmlCell *wxHtmlContainerCell::FindCellByPos(wxCoord x, wxCoord y,
1007 unsigned flags) const
1008 {
1009 if ( flags & wxHTML_FIND_EXACT )
1010 {
1011 for ( const wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext() )
1012 {
1013 int cx = cell->GetPosX(),
1014 cy = cell->GetPosY();
1015
1016 if ( (cx <= x) && (cx + cell->GetWidth() > x) &&
1017 (cy <= y) && (cy + cell->GetHeight() > y) )
1018 {
1019 return cell->FindCellByPos(x - cx, y - cy, flags);
1020 }
1021 }
1022 }
1023 else if ( flags & wxHTML_FIND_NEAREST_AFTER )
1024 {
1025 wxHtmlCell *c;
1026 for ( const wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext() )
1027 {
1028 if ( cell->IsFormattingCell() )
1029 continue;
1030 int cellY = cell->GetPosY();
1031 if (!( y < cellY || (y < cellY + cell->GetHeight() &&
1032 x < cell->GetPosX() + cell->GetWidth()) ))
1033 continue;
1034
1035 c = cell->FindCellByPos(x - cell->GetPosX(), y - cellY, flags);
1036 if (c) return c;
1037 }
1038 }
1039 else if ( flags & wxHTML_FIND_NEAREST_BEFORE )
1040 {
1041 wxHtmlCell *c2, *c = NULL;
1042 for ( const wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext() )
1043 {
1044 if ( cell->IsFormattingCell() )
1045 continue;
1046 int cellY = cell->GetPosY();
1047 if (!( cellY + cell->GetHeight() <= y ||
1048 (y >= cellY && x >= cell->GetPosX()) ))
1049 break;
1050 c2 = cell->FindCellByPos(x - cell->GetPosX(), y - cellY, flags);
1051 if (c2)
1052 c = c2;
1053 }
1054 if (c) return c;
1055 }
1056
1057 return NULL;
1058 }
1059
1060
1061 void wxHtmlContainerCell::OnMouseClick(wxWindow *parent, int x, int y, const wxMouseEvent& event)
1062 {
1063 wxHtmlCell *cell = FindCellByPos(x, y);
1064 if ( cell )
1065 cell->OnMouseClick(parent, x, y, event);
1066 }
1067
1068
1069
1070 wxHtmlCell *wxHtmlContainerCell::GetFirstTerminal() const
1071 {
1072 if ( m_Cells )
1073 {
1074 wxHtmlCell *c2;
1075 for (wxHtmlCell *c = m_Cells; c; c = c->GetNext())
1076 {
1077 c2 = c->GetFirstTerminal();
1078 if ( c2 )
1079 return c2;
1080 }
1081 }
1082 return NULL;
1083 }
1084
1085 wxHtmlCell *wxHtmlContainerCell::GetLastTerminal() const
1086 {
1087 if ( m_Cells )
1088 {
1089 // most common case first:
1090 wxHtmlCell *c = m_LastCell->GetLastTerminal();
1091 if ( c )
1092 return c;
1093
1094 wxHtmlCell *ctmp;
1095 wxHtmlCell *c2 = NULL;
1096 for (c = m_Cells; c; c = c->GetNext())
1097 {
1098 ctmp = c->GetLastTerminal();
1099 if ( ctmp )
1100 c2 = ctmp;
1101 }
1102 return c2;
1103 }
1104 else
1105 return NULL;
1106 }
1107
1108
1109 static bool IsEmptyContainer(wxHtmlContainerCell *cell)
1110 {
1111 for ( wxHtmlCell *c = cell->GetFirstChild(); c; c = c->GetNext() )
1112 {
1113 if ( !c->IsTerminalCell() || !c->IsFormattingCell() )
1114 return false;
1115 }
1116 return true;
1117 }
1118
1119 void wxHtmlContainerCell::RemoveExtraSpacing(bool top, bool bottom)
1120 {
1121 if ( top )
1122 SetIndent(0, wxHTML_INDENT_TOP);
1123 if ( bottom )
1124 SetIndent(0, wxHTML_INDENT_BOTTOM);
1125
1126 if ( m_Cells )
1127 {
1128 wxHtmlCell *c;
1129 wxHtmlContainerCell *cont;
1130 if ( top )
1131 {
1132 for ( c = m_Cells; c; c = c->GetNext() )
1133 {
1134 if ( c->IsTerminalCell() )
1135 {
1136 if ( !c->IsFormattingCell() )
1137 break;
1138 }
1139 else
1140 {
1141 cont = (wxHtmlContainerCell*)c;
1142 if ( IsEmptyContainer(cont) )
1143 {
1144 cont->SetIndent(0, wxHTML_INDENT_VERTICAL);
1145 }
1146 else
1147 {
1148 cont->RemoveExtraSpacing(true, false);
1149 break;
1150 }
1151 }
1152 }
1153 }
1154
1155 if ( bottom )
1156 {
1157 wxArrayPtrVoid arr;
1158 for ( c = m_Cells; c; c = c->GetNext() )
1159 arr.Add((void*)c);
1160
1161 for ( int i = arr.GetCount() - 1; i >= 0; i--)
1162 {
1163 c = (wxHtmlCell*)arr[i];
1164 if ( c->IsTerminalCell() )
1165 {
1166 if ( !c->IsFormattingCell() )
1167 break;
1168 }
1169 else
1170 {
1171 cont = (wxHtmlContainerCell*)c;
1172 if ( IsEmptyContainer(cont) )
1173 {
1174 cont->SetIndent(0, wxHTML_INDENT_VERTICAL); }
1175 else
1176 {
1177 cont->RemoveExtraSpacing(false, true);
1178 break;
1179 }
1180 }
1181 }
1182 }
1183 }
1184 }
1185
1186
1187
1188
1189 // --------------------------------------------------------------------------
1190 // wxHtmlColourCell
1191 // --------------------------------------------------------------------------
1192
1193 IMPLEMENT_ABSTRACT_CLASS(wxHtmlColourCell, wxHtmlCell)
1194
1195 void wxHtmlColourCell::Draw(wxDC& dc,
1196 int x, int y,
1197 int WXUNUSED(view_y1), int WXUNUSED(view_y2),
1198 wxHtmlRenderingInfo& info)
1199 {
1200 DrawInvisible(dc, x, y, info);
1201 }
1202
1203 void wxHtmlColourCell::DrawInvisible(wxDC& dc,
1204 int WXUNUSED(x), int WXUNUSED(y),
1205 wxHtmlRenderingInfo& info)
1206 {
1207 wxHtmlRenderingState& state = info.GetState();
1208 if (m_Flags & wxHTML_CLR_FOREGROUND)
1209 {
1210 state.SetFgColour(m_Colour);
1211 if (state.GetSelectionState() != wxHTML_SEL_IN)
1212 dc.SetTextForeground(m_Colour);
1213 else
1214 dc.SetTextForeground(
1215 info.GetStyle().GetSelectedTextColour(m_Colour));
1216 }
1217 if (m_Flags & wxHTML_CLR_BACKGROUND)
1218 {
1219 state.SetBgColour(m_Colour);
1220 if (state.GetSelectionState() != wxHTML_SEL_IN)
1221 {
1222 dc.SetTextBackground(m_Colour);
1223 dc.SetBackground(wxBrush(m_Colour, wxSOLID));
1224 }
1225 else
1226 {
1227 wxColour c = info.GetStyle().GetSelectedTextBgColour(m_Colour);
1228 dc.SetTextBackground(c);
1229 dc.SetBackground(wxBrush(c, wxSOLID));
1230 }
1231 }
1232 }
1233
1234
1235
1236
1237 // ---------------------------------------------------------------------------
1238 // wxHtmlFontCell
1239 // ---------------------------------------------------------------------------
1240
1241 IMPLEMENT_ABSTRACT_CLASS(wxHtmlFontCell, wxHtmlCell)
1242
1243 void wxHtmlFontCell::Draw(wxDC& dc,
1244 int WXUNUSED(x), int WXUNUSED(y),
1245 int WXUNUSED(view_y1), int WXUNUSED(view_y2),
1246 wxHtmlRenderingInfo& WXUNUSED(info))
1247 {
1248 dc.SetFont(m_Font);
1249 }
1250
1251 void wxHtmlFontCell::DrawInvisible(wxDC& dc, int WXUNUSED(x), int WXUNUSED(y),
1252 wxHtmlRenderingInfo& WXUNUSED(info))
1253 {
1254 dc.SetFont(m_Font);
1255 }
1256
1257
1258
1259
1260
1261
1262
1263
1264 // ---------------------------------------------------------------------------
1265 // wxHtmlWidgetCell
1266 // ---------------------------------------------------------------------------
1267
1268 IMPLEMENT_ABSTRACT_CLASS(wxHtmlWidgetCell, wxHtmlCell)
1269
1270 wxHtmlWidgetCell::wxHtmlWidgetCell(wxWindow *wnd, int w)
1271 {
1272 int sx, sy;
1273 m_Wnd = wnd;
1274 m_Wnd->GetSize(&sx, &sy);
1275 m_Width = sx, m_Height = sy;
1276 m_WidthFloat = w;
1277 }
1278
1279
1280 void wxHtmlWidgetCell::Draw(wxDC& WXUNUSED(dc),
1281 int WXUNUSED(x), int WXUNUSED(y),
1282 int WXUNUSED(view_y1), int WXUNUSED(view_y2),
1283 wxHtmlRenderingInfo& WXUNUSED(info))
1284 {
1285 int absx = 0, absy = 0, stx, sty;
1286 wxHtmlCell *c = this;
1287
1288 while (c)
1289 {
1290 absx += c->GetPosX();
1291 absy += c->GetPosY();
1292 c = c->GetParent();
1293 }
1294
1295 ((wxScrolledWindow*)(m_Wnd->GetParent()))->GetViewStart(&stx, &sty);
1296 m_Wnd->SetSize(absx - wxHTML_SCROLL_STEP * stx, absy - wxHTML_SCROLL_STEP * sty, m_Width, m_Height);
1297 }
1298
1299
1300
1301 void wxHtmlWidgetCell::DrawInvisible(wxDC& WXUNUSED(dc),
1302 int WXUNUSED(x), int WXUNUSED(y),
1303 wxHtmlRenderingInfo& WXUNUSED(info))
1304 {
1305 int absx = 0, absy = 0, stx, sty;
1306 wxHtmlCell *c = this;
1307
1308 while (c)
1309 {
1310 absx += c->GetPosX();
1311 absy += c->GetPosY();
1312 c = c->GetParent();
1313 }
1314
1315 ((wxScrolledWindow*)(m_Wnd->GetParent()))->GetViewStart(&stx, &sty);
1316 m_Wnd->SetSize(absx - wxHTML_SCROLL_STEP * stx, absy - wxHTML_SCROLL_STEP * sty, m_Width, m_Height);
1317 }
1318
1319
1320
1321 void wxHtmlWidgetCell::Layout(int w)
1322 {
1323 if (m_WidthFloat != 0)
1324 {
1325 m_Width = (w * m_WidthFloat) / 100;
1326 m_Wnd->SetSize(m_Width, m_Height);
1327 }
1328
1329 wxHtmlCell::Layout(w);
1330 }
1331
1332
1333
1334 // ----------------------------------------------------------------------------
1335 // wxHtmlTerminalCellsInterator
1336 // ----------------------------------------------------------------------------
1337
1338 const wxHtmlCell* wxHtmlTerminalCellsInterator::operator++()
1339 {
1340 if ( !m_pos )
1341 return NULL;
1342
1343 do
1344 {
1345 if ( m_pos == m_to )
1346 {
1347 m_pos = NULL;
1348 return NULL;
1349 }
1350
1351 if ( m_pos->GetNext() )
1352 m_pos = m_pos->GetNext();
1353 else
1354 {
1355 // we must go up the hierarchy until we reach container where this
1356 // is not the last child, and then go down to first terminal cell:
1357 while ( m_pos->GetNext() == NULL )
1358 {
1359 m_pos = m_pos->GetParent();
1360 if ( !m_pos )
1361 return NULL;
1362 }
1363 m_pos = m_pos->GetNext();
1364 }
1365 while ( m_pos->GetFirstChild() != NULL )
1366 m_pos = m_pos->GetFirstChild();
1367 } while ( !m_pos->IsTerminalCell() );
1368
1369 return m_pos;
1370 }
1371
1372
1373
1374
1375
1376
1377
1378 //-----------------------------------------------------------------------------
1379 // Cleanup
1380 //-----------------------------------------------------------------------------
1381
1382 class wxHtmlCellModule: public wxModule
1383 {
1384 DECLARE_DYNAMIC_CLASS(wxHtmlCellModule)
1385 public:
1386 wxHtmlCellModule() : wxModule() {}
1387 bool OnInit() { return true; }
1388 void OnExit()
1389 {
1390 wxDELETE(gs_cursorLink);
1391 wxDELETE(gs_cursorText);
1392 }
1393 };
1394
1395 IMPLEMENT_DYNAMIC_CLASS(wxHtmlCellModule, wxModule)
1396
1397 #endif