// Render element elmt onto the page currentPage.
// parent refers to the parent element within the current rendered page. When
// a page break occurs a new parent hierarchy is build for the new page
// and parent will point to the bottom of the new parent hierarchy.
// currentPage will refer to the current page being built. It will be updated
// inside this routine if elmt spans pages.
// top refers to the absolute position in the master rendered document.
private decimal RecurseRender(Element elmt,
ref Container parent,
ref Page currentPage,
decimal top,
decimal pos
)
{
decimal elementHeight = CalcHeight(elmt);
decimal requiredHeight = elementHeight;
decimal elementTop;
// If this element has repeated elements associated with it then make sure
// that there is room on the page for those repeated elements.
if (elmt is Container)
{
// If this is a toggle item, then determine if we want to include it in the
// rendered page.
if (((Container)elmt).Toggle != null && ((Container)elmt).Toggle.ToggleState == TextElement.ToggleStateEnum.closed)
{
return(0);
}
foreach (Container re in ((Container)elmt).RepeatList)
{
if (re.AbsoluteTop > elmt.AbsoluteTop)
{
requiredHeight += CalcHeight(re);
}
}
}
// If this element is spanning pages, then calculate the top
// based on the starting position of this page.
if (elmt.Parent != null && elmt.Parent.AbsoluteTop < currentPage.RelativeTop)
{
elementTop = pos - (currentPage.RelativeTop - elmt.Parent.AbsoluteTop);
}
else
{
elementTop = pos;
}
bool newPage = false;
if (elmt is Container && ((Container)elmt).PageBreakBefore)
{
newPage = true;
}
else if (PosOnPage(parent) + elementTop + requiredHeight > currentPage.AvailableHeight)
{
// If the element doesn't fit entirely on this page and we should keep it on
// one page, then create a new page.
if (!(elmt is Container) || (elmt is Container && ((Container)elmt).KeepTogether))
{
newPage = true;
}
}
if (newPage)
{
currentPage.AddFooters(parent);
currentPage = new Page(PageWidth - RightMargin - LeftMargin,
PageHeight - TopMargin - BottomMargin,
top, elmt.Parent, ref parent);
_pageList.Add(currentPage);
}
Element newElement = null;
if (elmt is Container)
{
newElement = ((Container)elmt).Copy(false);
newElement.CanGrowVertically = true;
// Loop through the repeated elements
foreach (Container r in ((Container)elmt).RepeatList)
{
// If the repeated element is below the current element then reserve space for it at the bottom.
if (r.AbsoluteTop > elmt.AbsoluteTop)
{
currentPage.FooterSpace += (r.Top - pos + elementHeight + CalcHeight(r));
}
}
}
if (elmt is TextElement)
{
newElement = new TextElement((TextElement)elmt);
}
if (elmt is ImageElement)
{
newElement = new ImageElement((ImageElement)elmt);
}
newElement.Parent = parent;
newElement.Top = 0;
newElement.Height = 0;
if (parent != null)
{
parent.Children.Add(newElement);
}
// Set the height of this element to either the height of the source element
// or the height of the remaining space on the page. Whichever is less.
newElement.Top = elementTop;
newElement.Height = Math.Min(elementHeight, currentPage.AvailableHeight - PosOnPage(parent));
if (elmt is Container)
{
Container be = newElement as Container;
decimal pos2 = 0;
foreach (Element child in ((Container)elmt).Children)
{
if (elmt is FixedContainer)
{
pos2 = child.Top;
}
pos2 += RecurseRender(child, ref be, ref currentPage, top + elmt.Top, pos2);
parent = be.Parent;
}
// Loop through the repeated elements
foreach (Container r in be.RepeatList)
{
// If the repeated element is below the current element then release the reserved space
if (r.AbsoluteTop > be.AbsoluteTop)
{
currentPage.FooterSpace -= (r.Top - elmt.Top + elementHeight + CalcHeight(r));
}
}
if (be.PageBreakAfter)
{
currentPage.AddFooters(parent);
currentPage = new Page(PageWidth - RightMargin - LeftMargin,
PageHeight - TopMargin - BottomMargin,
top, elmt.Parent, ref parent);
_pageList.Add(currentPage);
}
}
return(elementHeight);
}
public ImageElement(ImageElement ie)
: base(ie)
{
}