/// <summary>
/// Removes the last item from this region and checks
/// to make sure that the item removed matches the povided item
/// </summary>
/// <param name="ensureitem"></param>
public void AssertRemoveLastItem(PDFLayoutItem ensureitem)
{
PDFLayoutItem removed = this.RemoveLastItem();
if (removed != ensureitem)
{
throw new ArgumentOutOfRangeException("ensureItem");
}
}
/// <summary>
/// Internal method that changes the parent of this item - cannot be null
/// </summary>
/// <param name="item"></param>
internal void SetParent(PDFLayoutItem item)
{
if (null == item)
{
throw new ArgumentNullException("item");
}
this.Parent = item;
}
protected virtual IPDFResourceContainer GetParentResourceRegister()
{
PDFLayoutItem parent = this.Parent;
while (null != parent && !(parent is IPDFResourceContainer))
{
parent = parent.Parent;
}
return(parent as IPDFResourceContainer);
}
internal protected PDFLayoutBlock GetParentBlock()
{
PDFLayoutItem parent = this.Parent;
while (null != parent && !(parent is PDFLayoutBlock))
{
parent = parent.Parent;
}
return(parent as PDFLayoutBlock);
}
/// <summary>
/// Removes the latout item from this regions contents if it exists. Returns true if it was removed, otherwise false
/// </summary>
/// <param name="ensureItem"></param>
/// <returns></returns>
public bool RemoveItem(PDFLayoutItem ensureItem)
{
if (null != ensureItem)
{
return(this.Contents.Remove(ensureItem));
}
else
{
return(false);
}
}
/// <summary>
/// Increases the size of this region by the size of the layout item
/// </summary>
/// <param name="item"></param>
public void AddToSize(PDFLayoutItem item)
{
PDFUnit h = item.Height;
PDFUnit w = item.Width;
//Update the size
PDFSize sz = this.UsedSize;
sz.Height += h;
sz.Width = PDFUnit.Max(sz.Width, w);
this.UsedSize = sz;
}
/// <summary>
/// Checks that the last item in this region is closed
/// </summary>
protected virtual void AssertLastItemIsClosed()
{
if (null == _contents || _contents.Count == 0)
{
return;
}
PDFLayoutItem last = _contents[_contents.Count - 1];
if (!last.IsClosed)
{
throw new InvalidOperationException(Errors.LayoutContainerHasExistingOpenItem);
}
}
/// <summary>
/// Closes the currently open line or block
/// </summary>
/// <returns>true if the line was closed.</returns>
public void CloseCurrentItem()
{
//Current line will throw an exeception if this region is closed.
PDFLayoutItem last = this.CurrentItem;
if (null != last && !last.IsClosed)
{
//We have a line so lets try to close it.
last.Close();
//AddToSize(last);
}
}
/// <summary>
/// Gets the index of the page this item is positioned on
/// </summary>
/// <returns></returns>
protected int GetPageIndex()
{
PDFLayoutItem item = this;
while (null != item)
{
if (item is PDFLayoutPage)
{
return((item as PDFLayoutPage).PageIndex);
}
else
{
item = item.Parent;
}
}
return(NULL_PAGEINDEX);
}
/// <summary>
/// Removes and returns the last item in this region. If this region doesn't have any contents, then returns null.
/// </summary>
/// <returns>The last item removed</returns>
public PDFLayoutItem RemoveLastItem()
{
//this.AssertIsOpen();
if (this._contents == null || _contents.Count == 0)
{
return(null);
}
int last = this.Contents.Count - 1;
PDFLayoutItem removed = this.Contents[last];
if (removed is PDFLayoutLine)
{
((PDFLayoutLine)removed).LineIndex = -1;
}
this.Contents.RemoveAt(last);
return(removed);
}
//
// methods
//
#region public PDFLayoutBlock LastOpenBlock()
/// <summary>
/// Returns the last block in this region that is open.
/// Returns null if this region does not contain any blocks, or the last block is closed.
/// </summary>
/// <returns></returns>
public PDFLayoutBlock LastOpenBlock()
{
if (null != this.Contents && this.Contents.Count > 0)
{
PDFLayoutItem item = this.Contents[this.Contents.Count - 1];
if (item is PDFLayoutBlock)
{
PDFLayoutBlock block = item as PDFLayoutBlock;
if (block.IsClosed == false)
{
return(block.LastOpenBlock());
}
}
else
{
//the last item is not a block, so any previous blocks must be closed.
}
}
return(null);
}
/// <summary>
/// Gets the index of the column this item is positioned on
/// </summary>
/// <returns></returns>
protected int GetColumnIndex()
{
PDFLayoutItem item = this;
while (null != item)
{
if (item is PDFLayoutRegion)
{
return((item as PDFLayoutRegion).ColumnIndex);
}
else if (item is PDFLayoutBlock)
{
return((item as PDFLayoutBlock).CurrentRegion.ColumnIndex);
}
else
{
item = item.Parent;
}
}
return(NULL_COLUMNINDEX);
}
//
// ctor(s)
//
#region protected PDFLayoutItem(PDFLayoutItem parent)
/// <summary>
/// Creates a new PDFLayout item
/// </summary>
/// <param name="parent"></param>
protected PDFLayoutItem(PDFLayoutItem parent, IPDFComponent owner)
{
this.Owner = owner;
this.Parent = parent;
this.IsClosed = false;
}
//
// .ctor(s)
//
#region protected PDFLayoutContainerItem(PDFLayoutItem parent, IPDFComponent owner, IPDFLayoutEngine engine, PDFStyle full)
/// <summary>
/// Creates a new PDFLayoutContainerItem with the specified parent, owner and style
/// </summary>
/// <param name="parent">The parent container of this item</param>
/// <param name="owner">The component owner of this item</param>
/// <param name="full">The style applied to this item based on it's container owner</param>
protected PDFLayoutContainerItem(PDFLayoutItem parent, IPDFComponent owner, IPDFLayoutEngine engine, Style full)
: base(parent, owner)
{
this.FullStyle = full;
this.Engine = engine;
}
