/// <summary>
/// Value-setting constructor.
/// </summary>
/// <param name="parent">The parent node of this page in the document page tree.</param>
/// <param name="objectId">The indirect object ID of this page.</param>
/// <param name="size">The paper size of this page.</param>
/// <param name="orientation">The orientation of this page.</param>
/// <param name="horizontalMarginProportion">The proportion of the page taken up by each of the left and right margins.</param>
/// <param name="verticalMarginProportion">The proportion of the page taken up by each of the top and bottom margins.</param>
/// <param name="generation">The object generation number. Defaults to zero. As we do not currently support rewriting existing documents, this should not be set.</param>
public PdfPage(
PdfPageTreeNode parent,
int objectId,
PhysicalPageSize size,
PageOrientation orientation,
double horizontalMarginProportion,
double verticalMarginProportion,
int generation = 0)
: base(parent, objectId, generation)
{
if (parent == null)
{
throw new ArgumentNullException(nameof(parent));
}
PageSize = size;
PageOrientation = orientation;
UniSize pagePtSize = size.ToUniSize(orientation);
TopMarginPosition = pagePtSize.Height * verticalMarginProportion;
BottomMarginPosition = pagePtSize.Height - TopMarginPosition;
LeftMarginPosition = pagePtSize.Width * horizontalMarginProportion;
RightMarginPosition = pagePtSize.Width - LeftMarginPosition;
PageAvailableWidth = RightMarginPosition - LeftMarginPosition;
CurrentVerticalCursor = TopMarginPosition;
MediaBox = size.ToPdfRectangle(orientation);
}
/// <summary>
/// Value-setting constructor.
/// </summary>
/// <param name="parent">The parent of this item. Can be null if this item is the root node of the tree.</param>
/// <param name="objectId">The indirect object ID of this item.</param>
/// <param name="generation">The generation number of this item. Defaults to zero. As the library does not currently support rewriting existing files, this parameter should not be set.</param>
protected PdfPageTreeItem(PdfPageTreeNode parent, int objectId, int generation = 0) : base(objectId, generation)
{
Parent = parent;
}
/// <summary>
/// Constructor.
/// </summary>
/// <param name="pageRoot">The document page tree root node.</param>
/// <param name="objectId">The indirect object ID of the catalogue.</param>
/// <param name="generation">The generation number of the catalogue. This defaults to zero and can effectively be ignored when creating a new document.</param>
/// <exception cref="ArgumentNullException">Thrown if the pageRoot parameter is null.</exception>
public PdfCatalogue(PdfPageTreeNode pageRoot, int objectId, int generation = 0) : base(objectId, generation)
{
PageRoot = pageRoot ?? throw new ArgumentNullException(nameof(pageRoot));
}
/// <summary>
/// Constructor.
/// </summary>
/// <param name="parent">The parent node of this node (null if this is the root of the page tree).</param>
/// <param name="objectId">The indirect object ID of the node.</param>
/// <param name="generation">The generation number of this object. Defaults to 0. As the library does not support rewriting existing files, should not be set.</param>
public PdfPageTreeNode(PdfPageTreeNode parent, int objectId, int generation = 0) : base(parent, objectId, generation)
{
Kids = new List <PdfPageTreeItem>();
}