/// <summary>
/// Initializes a new instance of the XForm class such that it can be drawn on the specified graphics
/// object.
/// </summary>
/// <param name="gfx">The graphics object that later is used to draw this form.</param>
/// <param name="size">The size in points of the form.</param>
public XForm(XGraphics gfx, XSize size)
{
if (gfx == null)
{
throw new ArgumentNullException("gfx");
}
if (size.Width < 1 || size.Height < 1)
{
throw new ArgumentNullException("size", "The size of the XPDFForm is to small.");
}
_formState = FormState.Created;
//templateSize = size;
_viewBox.Width = size.Width;
_viewBox.Height = size.Height;
// If gfx belongs to a PDFPage also create the PDFFormXObject
if (gfx.PDFPage != null)
{
_document = gfx.PDFPage.Owner;
_pdfForm = new PDFFormXObject(_document, this);
PDFRectangle rect = new PDFRectangle(new XPoint(), size);
_pdfForm.Elements.SetRectangle(PDFFormXObject.Keys.BBox, rect);
}
}
public void Write(PDFRectangle rect)
{
const string format = Config.SignificantFigures3;
WriteSeparator(CharCat.Delimiter, '/');
WriteRaw(PDFEncoders.Format("[{0:" + format + "} {1:" + format + "} {2:" + format + "} {3:" + format + "}]", rect.X1, rect.Y1, rect.X2, rect.Y2));
_lastCat = CharCat.Delimiter;
}
/// <summary>
/// Creates a link to the web.
/// </summary>
public static PDFLinkAnnotation CreateWebLink(PDFRectangle rect, string url)
{
PDFLinkAnnotation link = new PDFLinkAnnotation
{
_linkType = LinkType.Web,
Rectangle = rect,
_url = url
};
return(link);
}
/// <summary>
/// Creates a link to a file.
/// </summary>
public static PDFLinkAnnotation CreateFileLink(PDFRectangle rect, string fileName)
{
PDFLinkAnnotation link = new PDFLinkAnnotation
{
_linkType = LinkType.File,
// TODO: Adjust bleed box here (if possible)
Rectangle = rect,
_url = fileName
};
return(link);
}
/// <summary>
/// Initializes a new instance of the <see cref="XForm"/> class that represents a page of a PDF document.
/// </summary>
/// <param name="document">The PDF document.</param>
/// <param name="viewBox">The view box of the page.</param>
public XForm(PDFDocument document, XRect viewBox)
{
if (viewBox.Width < 1 || viewBox.Height < 1)
{
throw new ArgumentNullException("viewBox", "The size of the XPDFForm is to small.");
}
_formState = FormState.Created;
Owner = document ?? throw new ArgumentNullException("document", "An XPDFForm template must be associated with a document at creation time.");
_pdfForm = new PDFFormXObject(document, this);
//_templateSize = size;
ViewBox = viewBox;
PDFRectangle rect = new PDFRectangle(viewBox);
_pdfForm.Elements.SetRectangle(PDFFormXObject.Keys.BBox, rect);
}
/// <summary>
/// Creates a link within the current document.
/// </summary>
/// <param name="rect">The link area in default page coordinates.</param>
/// <param name="destinationPage">The one-based destination page number.</param>
public static PDFLinkAnnotation CreateDocumentLink(PDFRectangle rect, int destinationPage)
{
if (destinationPage < 1)
{
throw new ArgumentException("Invalid destination page in call to CreateDocumentLink: page number is one-based and must be 1 or higher.", "destinationPage");
}
PDFLinkAnnotation link = new PDFLinkAnnotation
{
_linkType = LinkType.Document,
Rectangle = rect,
_destPage = destinationPage
};
return(link);
}
internal PDFFormXObject(PDFDocument thisDocument, PDFImportedObjectTable importedObjectTable, XPDFForm form)
: base(thisDocument)
{
Debug.Assert(importedObjectTable != null);
Debug.Assert(ReferenceEquals(thisDocument, importedObjectTable.Owner));
Elements.SetName(Keys.Type, "/XObject");
Elements.SetName(Keys.Subtype, "/Form");
if (form.IsTemplate)
{
Debug.Assert(importedObjectTable == null);
// TODO more initialization here???
return;
}
XPDFForm pdfForm = form;
// Get import page
PDFPages importPages = importedObjectTable.ExternalDocument.Pages;
if (pdfForm.PageNumber < 1 || pdfForm.PageNumber > importPages.Count)
{
PSSR.ImportPageNumberOutOfRange(pdfForm.PageNumber, importPages.Count, form._path);
}
PDFPage importPage = importPages[pdfForm.PageNumber - 1];
// Import resources
PDFItem res = importPage.Elements["/Resources"];
if (res != null) // unlikely but possible
{
#if true
// Get root object
PDFObject root = res is PDFReference ? ((PDFReference)res).Value : (PDFDictionary)res;
root = ImportClosure(importedObjectTable, thisDocument, root);
// If the root was a direct object, make it indirect.
if (root.Reference == null)
{
thisDocument.IrefTable.Add(root);
}
Debug.Assert(root.Reference != null);
Elements["/Resources"] = root.Reference;
#else
// Get transitive closure
PDFObject[] resources = importPage.Owner.Internals.GetClosure(resourcesRoot);
int count = resources.Length;
#if DEBUG_
for (int idx = 0; idx < count; idx++)
{
Debug.Assert(resources[idx].XRef != null);
Debug.Assert(resources[idx].XRef.Document != null);
Debug.Assert(resources[idx].Document != null);
if (resources[idx].ObjectID.ObjectNumber == 12)
{
GetType();
}
}
#endif
// 1st step. Already imported objects are reused and new ones are cloned.
for (int idx = 0; idx < count; idx++)
{
PDFObject obj = resources[idx];
if (importedObjectTable.Contains(obj.ObjectID))
{
// external object was already imported
PDFReference iref = importedObjectTable[obj.ObjectID];
Debug.Assert(iref != null);
Debug.Assert(iref.Value != null);
Debug.Assert(iref.Document == Owner);
// replace external object by the already clone counterpart
resources[idx] = iref.Value;
}
else
{
// External object was not imported earlier and must be cloned
PDFObject clone = obj.Clone();
Debug.Assert(clone.Reference == null);
clone.Document = Owner;
if (obj.Reference != null)
{
// add it to this (the importer) document
Owner.irefTable.Add(clone);
Debug.Assert(clone.Reference != null);
// save old object identifier
importedObjectTable.Add(obj.ObjectID, clone.Reference);
//Debug.WriteLine("Cloned: " + obj.ObjectID.ToString());
}
else
{
// The root object (the /Resources value) is not an indirect object
Debug.Assert(idx == 0);
// add it to this (the importer) document
Owner.irefTable.Add(clone);
Debug.Assert(clone.Reference != null);
}
// replace external object by its clone
resources[idx] = clone;
}
}
#if DEBUG_
for (int idx = 0; idx < count; idx++)
{
Debug.Assert(resources[idx].XRef != null);
Debug.Assert(resources[idx].XRef.Document != null);
Debug.Assert(resources[idx].Document != null);
if (resources[idx].ObjectID.ObjectNumber == 12)
{
GetType();
}
}
#endif
// 2nd step. Fix up indirect references that still refers to the import document.
for (int idx = 0; idx < count; idx++)
{
PDFObject obj = resources[idx];
Debug.Assert(obj.Owner != null);
FixUpObject(importedObjectTable, importedObjectTable.Owner, obj);
}
// Set resources key to the root of the clones
Elements["/Resources"] = resources[0].Reference;
#endif
}
// Take /Rotate into account.
PDFRectangle rect = importPage.Elements.GetRectangle(PDFPage.InheritablePageKeys.MediaBox);
// Reduce rotation to 0, 90, 180, or 270.
int rotate = (importPage.Elements.GetInteger(PDFPage.InheritablePageKeys.Rotate) % 360 + 360) % 360;
//rotate = 0;
if (rotate == 0)
{
// Set bounding box to media box.
Elements["/BBox"] = rect;
}
else
{
// TODO: Have to adjust bounding box? (I think not, but I'm not sure -> wait for problem)
Elements["/BBox"] = rect;
// Rotate the image such that it is upright.
XMatrix matrix = new XMatrix();
double width = rect.Width;
double height = rect.Height;
matrix.RotateAtPrepend(-rotate, new XPoint(width / 2, height / 2));
// Translate the image such that its center lies on the center of the rotated bounding box.
double offset = (height - width) / 2;
if (rotate == 90)
{
// TODO It seems we can simplify this as the sign of offset changes too.
if (height > width)
{
matrix.TranslatePrepend(offset, offset); // Tested.
}
else
{
matrix.TranslatePrepend(offset, offset); // TODO Test case.
}
}
else if (rotate == 270)
{
// TODO It seems we can simplify this as the sign of offset changes too.
if (height > width)
{
matrix.TranslatePrepend(-offset, -offset); // Tested.
}
else
{
matrix.TranslatePrepend(-offset, -offset); // Tested.
}
}
//string item = "[" + PDFEncoders.ToString(matrix) + "]";
//Elements[Keys.Matrix] = new PDFLiteral(item);
Elements.SetMatrix(Keys.Matrix, matrix);
}
// Preserve filter because the content keeps unmodified.
PDFContent content = importPage.Contents.CreateSingleContent();
#if !DEBUG
content.Compressed = true;
#endif
PDFItem filter = content.Elements["/Filter"];
if (filter != null)
{
Elements["/Filter"] = filter.Clone();
}
// (no cloning needed because the bytes keep untouched)
Stream = content.Stream; // new PDFStream(bytes, this);
Elements.SetInteger("/Length", content.Stream.Value.Length);
}
