GroupCell *GroupCell::Fold() {
if (!IsFoldable() || m_hiddenTree) // already folded?? shouldn't happen
return NULL;
if (m_next == NULL)
return NULL;
int nextgct = dynamic_cast<GroupCell*>(m_next)->GetGroupType(); // groupType of the next cell
if ((m_groupType == nextgct) || IsLesserGCType(nextgct))
return NULL; // if the next gc shouldn't be folded, exit
// now there is at least one cell to fold (at least m_next)
GroupCell *end = dynamic_cast<GroupCell*>(m_next);
GroupCell *start = end; // first to fold
while (end) {
GroupCell *tmp = dynamic_cast<GroupCell*>(end->m_next);
if (tmp == NULL)
break;
if ((m_groupType == tmp->GetGroupType()) || IsLesserGCType(tmp->GetGroupType()))
break; // the next one of the end is not suitable for folding, break
end = tmp;
}
// cell(s) to fold are between start and end (including these two)
MathCell *next = end->m_next;
m_next = m_nextToDraw = next; // may be NULL, it's ok
if (next)
next->m_previous = next->m_previousToDraw = this;
start->m_previous = start->m_previousToDraw = NULL;
end->m_next = end->m_nextToDraw = NULL;
m_hiddenTree = start; // save the torn out tree into m_hiddenTree
m_hiddenTree->SetHiddenTreeParent(this);
return this;
}
void MathPrintout::BreakPages()
{
if (m_tree == NULL)
return ;
int pageWidth, pageHeight;
int marginX, marginY;
int headerHeight = GetHeaderHeight();
double scale = GetPPIScale();
GetPageMargins(&marginX, &marginY);
GetPageSizePixels(&pageWidth, &pageHeight);
int currentHeight = marginY;
int skip = SCALE_PX(MC_GROUP_SKIP, scale);;
GroupCell* tmp = (GroupCell *)m_tree;
m_pages.push_back(tmp);
m_numberOfPages = 1;
while (tmp != NULL)
{
tmp->BreakPage(false);
if (currentHeight + tmp->GetMaxHeight() + skip >= pageHeight - marginY ||
tmp->GetGroupType() == GC_TYPE_PAGEBREAK)
{
if (tmp->GetGroupType() != GC_TYPE_PAGEBREAK)
currentHeight = marginY + tmp->GetMaxHeight() + headerHeight;
tmp->BreakPage(true);
m_pages.push_back(tmp);
m_numberOfPages++;
}
else
currentHeight += tmp->GetMaxHeight() + skip;
tmp = (GroupCell *)tmp->m_next;
}
}
bool MathPrintout::OnPrintPage(int num)
{
double screenScaleX, screenScaleY;
double ppiScale;
GroupCell* tmp;
wxDC* dc = GetDC();
int marginX, marginY;
GetPageMargins(&marginX, &marginY);
ppiScale = GetPPIScale();
GetScreenScale(&screenScaleX, &screenScaleY);
marginX += SCALE_PX(MC_BASE_INDENT, ppiScale);
dc->SetUserScale(screenScaleX, screenScaleY);
// Go to current page
tmp = (GroupCell *)m_pages[num - 1];
// Print page
if (tmp != NULL)
{
if (tmp->GetGroupType() == GC_TYPE_PAGEBREAK)
tmp = (GroupCell *)tmp->m_next;
if (tmp == NULL)
return true;
wxPoint point;
point.x = marginX;
point.y = marginY + tmp->GetMaxCenter() + GetHeaderHeight();
wxConfigBase* config = wxConfig::Get();
int fontsize = 12;
int drop = tmp->GetMaxDrop();
config->Read(wxT("fontsize"), &fontsize);
PrintHeader(num, dc, ppiScale);
CellParser parser(*dc, ppiScale);
parser.SetIndent(marginX);
while (tmp != NULL && tmp->GetGroupType() != GC_TYPE_PAGEBREAK)
{
tmp->Draw(parser, point, fontsize, false);
if (tmp->m_next != NULL) {
point.x = marginX;
point.y += drop + tmp->m_next->GetMaxCenter();
point.y += SCALE_PX(MC_GROUP_SKIP, ppiScale);
drop = tmp->m_next->GetMaxDrop();
}
tmp = (GroupCell *)tmp->m_next;
if (tmp == NULL || tmp->BreakPageHere())
break;
}
return true;
}
return false;
}
bool MathPrintout::OnPrintPage(int num)
{
double screenScaleX, screenScaleY;
double ppiScale;
GroupCell* tmp;
wxDC* dc = GetDC();
int marginX, marginY;
GetPageMargins(&marginX, &marginY);
ppiScale = GetPPIScale();
GetScreenScale(&screenScaleX, &screenScaleY);
marginX += SCALE_PX(MC_BASE_INDENT, ppiScale);
dc->SetUserScale(screenScaleX, screenScaleY);
// Go to current page
tmp = (GroupCell *)m_pages[num - 1];
// Print page
if (tmp != NULL)
{
if (tmp->GetGroupType() == GC_TYPE_PAGEBREAK)
tmp = (GroupCell *)tmp->m_next;
if (tmp == NULL)
return true;
wxPoint point;
point.x = marginX;
point.y = marginY + tmp->GetMaxCenter() + GetHeaderHeight();
wxConfigBase* config = wxConfig::Get();
int fontsize = 12;
int drop = tmp->GetMaxDrop();
config->Read(wxT("fontsize"), &fontsize);
PrintHeader(num, dc, ppiScale);
CellParser parser(*dc, ppiScale);
parser.SetIndent(marginX);
// Inform the output routines that we are printing
parser.SetPrinter(true);
// Make sure that during print nothing is outside the crop rectangle
MathCell::ClipToDrawRegion(true);
while (tmp != NULL && tmp->GetGroupType() != GC_TYPE_PAGEBREAK)
{
// The following line seems to misteriously fix the "subsequent text
// cells aren't printed" problem on linux.
// No Idea why, though.
dc->SetPen(wxPen(wxT("light grey"), 1, wxPENSTYLE_SOLID));
tmp->Draw(point, fontsize);
if (tmp->m_next != NULL) {
point.x = marginX;
point.y += drop + tmp->m_next->GetMaxCenter();
point.y += SCALE_PX(MC_GROUP_SKIP, ppiScale);
drop = tmp->m_next->GetMaxDrop();
}
tmp = (GroupCell *)tmp->m_next;
if (tmp == NULL || tmp->BreakPageHere())
break;
}
MathCell::ClipToDrawRegion(false);
return true;
}
MathCell::ClipToDrawRegion(false);
return false;
}