////////////////////////////////////////////////////////////////////
// Default constructor
// Default page size is letter (height 11”, width 8.5”)
// Page orientation is portrait
// Unit of measure is points (scale factor 1.0)
////////////////////////////////////////////////////////////////////
public PdfDocument()
{
// initialize object array
ObjectArray = new List <PdfObject>();
// PDF document root object the Catalog object
PdfObject Catalog = new PdfObject(this, false, "/Catalog");
// add viewer preferences
Catalog.AddToDictionary("/ViewerPreferences", "<</PrintScaling/None>>");
// Parent object for all pages
PagesObject = new PdfObject(this, false, "/Pages");
// add indirect reference to pages within the catalog object
Catalog.AddToDictionary("/Pages", PagesObject);
// create standard proc set
ProcSetObject = new PdfObject(this, false);
ProcSetObject.ContentsString = new StringBuilder("[/PDF/Text/ImageB/ImageC/ImageI]");
// save page default size
PageSize = new SizeD(8.5 * 72.0, 11.0 * 72.0);
// scale factor
ScaleFactor = 1.0;
// exit
return;
}
////////////////////////////////////////////////////////////////////
// Initial Object Array
////////////////////////////////////////////////////////////////////
internal void InitialObjectArray()
{
// PDF document root object the Catalog object
PdfObject CatalogObject = new PdfObject(this, false, "/Catalog");
// add viewer preferences
CatalogObject.AddToDictionary("/ViewerPreferences", "<</PrintScaling/None>>");
// Parent object for all pages
PagesObject = new PdfObject(this, false, "/Pages");
// add indirect reference to pages within the catalog object
CatalogObject.AddToDictionary("/Pages", PagesObject);
// reset page count
PageCount = 0;
// document id
DocumentID = RandomByteArray(16);
// exit
return;
}
////////////////////////////////////////////////////////////////////
// Write object to PDF file
////////////////////////////////////////////////////////////////////
internal override void WriteObjectToPdfFile
(
BinaryWriter PdfFile
)
{
// look for first and last character
Int32 FirstChar;
Int32 LastChar;
for (FirstChar = 0; FirstChar < 256 && !ActiveChar[FirstChar]; FirstChar++)
{
;
}
if (FirstChar == 256)
{
return;
}
for (LastChar = 255; !ActiveChar[LastChar]; LastChar--)
{
;
}
// pdf font name
StringBuilder PdfFontName = new StringBuilder("/");
// for embedded font add 6 alpha characters prefix
if (EmbeddedFont)
{
PdfFontName.Append("PFWAAA+");
Int32 Ptr1 = 6;
for (Int32 Ptr2 = ResourceCode.Length - 1; Ptr2 >= 0 && Char.IsDigit(ResourceCode[Ptr2]); Ptr2--)
{
PdfFontName[Ptr1--] = (Char)((Int32)ResourceCode[Ptr2] + ('A' - '0'));
}
}
// PDF readers are not happy with space in font name
PdfFontName.Append(FontFamily.Name.Replace(" ", "#20"));
// font name
if ((DesignFont.Style & FontStyle.Bold) != 0)
{
if ((DesignFont.Style & FontStyle.Italic) != 0)
{
PdfFontName.Append(",BoldItalic");
}
else
{
PdfFontName.Append(",Bold");
}
}
else if ((DesignFont.Style & FontStyle.Italic) != 0)
{
PdfFontName.Append(",Italic");
}
// add items to dictionary
AddToDictionary("/Subtype", "/TrueType");
AddToDictionary("/BaseFont", PdfFontName.ToString());
// add first and last characters
AddToDictionary("/FirstChar", FirstChar.ToString());
AddToDictionary("/LastChar", LastChar.ToString());
// create font descriptor
FontDescriptor = new PdfObject(Document, false, "/FontDescriptor");
// add link to font object
AddToDictionary("/FontDescriptor", FontDescriptor);
// font descriptor dictionary
FontDescriptor.AddToDictionary("/FontName", PdfFontName.ToString()); // must be the same as BaseFont above
FontDescriptor.AddToDictionary("/Flags", ((Int32)FontFlags).ToString());
FontDescriptor.AddToDictionary("/ItalicAngle", String.Format(NFI.DecSep, "{0}", (Single)PdfItalicAngle));
FontDescriptor.AddToDictionary("/FontWeight", PdfFontWeight.ToString());
FontDescriptor.AddToDictionary("/Leading", String.Format(NFI.DecSep, "{0}", (Single)FontUnitsToPdfDic(PdfLeading)));
FontDescriptor.AddToDictionary("/Ascent", String.Format(NFI.DecSep, "{0}", (Single)FontUnitsToPdfDic(PdfAscent)));
FontDescriptor.AddToDictionary("/Descent", String.Format(NFI.DecSep, "{0}", (Single)FontUnitsToPdfDic(-PdfDescent)));
// alphabetic (non symbolic) fonts
if ((FontFlags & PdfFontFlags.Symbolic) == 0)
{
AddToDictionary("/Encoding", "/WinAnsiEncoding");
BoundingBox Box = FontInfo.GetGlyphMetricsApi('x');
FontDescriptor.AddToDictionary("/XHeight", String.Format(NFI.DecSep, "{0}", (Single)FontUnitsToPdfDic(Box.Rect.Top)));
FontDescriptor.AddToDictionary("/AvgWidth", String.Format(NFI.DecSep, "{0}", (Single)FontUnitsToPdfDic(Box.Width)));
Box = FontInfo.GetGlyphMetricsApi('M');
PdfCapHeight = Box.Rect.Top;
FontDescriptor.AddToDictionary("/CapHeight", String.Format(NFI.DecSep, "{0}", (Single)FontUnitsToPdfDic(Box.Rect.Top)));
FontDescriptor.AddToDictionary("/StemV", String.Format(NFI.DecSep, "{0}", (Single)StemV()));
}
// create width object array
FontWidthArray = new PdfObject(Document, false);
// add link to font object
AddToDictionary("/Widths", FontWidthArray);
// build bounding box and width array
Double Left = Double.MaxValue;
Double Bottom = Double.MaxValue;
Double Right = Double.MinValue;
Double Top = Double.MinValue;
Double MaxWidth = Double.MinValue;
FontWidthArray.ContentsString = new StringBuilder("[");
Int32 EolLength = 100;
for (Int32 Index = FirstChar; Index <= LastChar; Index++)
{
Double CharWidth;
// not used
if (!ActiveChar[Index])
{
CharWidth = 0;
}
// used
else
{
// bounding box
BoundingBox GM = GlyphArray[Index];
if (GM.Rect.Left < Left)
{
Left = GM.Rect.Left;
}
if (GM.Rect.Bottom < Bottom)
{
Bottom = GM.Rect.Bottom;
}
if (GM.Rect.Right > Right)
{
Right = GM.Rect.Right;
}
if (GM.Rect.Top > Top)
{
Top = GM.Rect.Top;
}
// character advance width
CharWidth = GM.Width;
// max width
if (CharWidth > MaxWidth)
{
MaxWidth = CharWidth;
}
}
// add width to width array
if (FontWidthArray.ContentsString.Length > EolLength)
{
FontWidthArray.ContentsString.Append('\n');
EolLength = FontWidthArray.ContentsString.Length + 100;
}
// add width to width array
FontWidthArray.ContentsString.AppendFormat(NFI.DecSep, "{0} ", FontUnitsToPdfDic(CharWidth));
}
// add to font descriptor array
FontDescriptor.AddToDictionary("/MaxWidth", String.Format(NFI.DecSep, "{0}", (Single)FontUnitsToPdfDic(MaxWidth)));
FontDescriptor.AddToDictionary("/FontBBox", String.Format(NFI.DecSep, "[{0} {1} {2} {3}]",
FontUnitsToPdfDic(Left), FontUnitsToPdfDic(Bottom), FontUnitsToPdfDic(Right), FontUnitsToPdfDic(Top)));
// terminate width array
FontWidthArray.ContentsString.Length--;
FontWidthArray.ContentsString.Append("]");
// create font file
if (EmbeddedFont)
{
// create font file stream
PdfFontFile EmbeddedFontObj = new PdfFontFile(this);
// add link to font object
FontDescriptor.AddToDictionary("/FontFile2", EmbeddedFontObj);
}
// call base write PdfObject to file method
base.WriteObjectToPdfFile(PdfFile);
// exit
return;
}
////////////////////////////////////////////////////////////////////
// Constructor for web link
// NOTE:
// The four position arguments are in relation to the
// bottom left corner of the paper
////////////////////////////////////////////////////////////////////
public void AddWebLink
(
Double LeftPos,
Double BottomPos,
Double RightPos,
Double TopPos,
String WebLink
)
{
// if web link is empty, ignore this call
if (String.IsNullOrWhiteSpace(WebLink))
{
return;
}
// search list
Int32 ObjNo;
StrObject StrObj = new StrObject(WebLink);
Int32 Index = Document.StrObjects.BinarySearch(StrObj);
// this string is a duplicate
if (Index >= 0)
{
// get object number
ObjNo = Document.StrObjects[Index].ObjNo;
}
// new string
else
{
// copy text to temp string builder
StringBuilder PdfText = new StringBuilder("(");
// scan string
foreach (Char TestChar in WebLink)
{
// validate character
if (TestChar < ' ' || TestChar > '~' && TestChar < 161 || TestChar > 255)
{
throw new ApplicationException("Web link invalid character");
}
if (TestChar == '\\' || TestChar == '(' || TestChar == ')')
{
PdfText.Append('\\');
}
PdfText.Append(TestChar);
}
PdfText.Append(')');
// create indirect string object for web link
PdfObject WebLinkObject = new PdfIndirectString(Document, PdfText);
// get object number
ObjNo = WebLinkObject.ObjectNumber;
// save new string
StrObj.ObjNo = ObjNo;
Document.StrObjects.Insert(~Index, StrObj);
}
// create PdfObject for annotation
PdfObject Annotation = new PdfObject(Document, false, "/Annot");
Annotation.AddToDictionary("/A", String.Format("<</S/URI/Type/Action/URI {0} 0 R>>", ObjNo));
Annotation.AddToDictionary("/BS", "<</W 0>>");
Annotation.AddToDictionary("/F", "4");
Annotation.AddToDictionary("/Rect", String.Format(NFI.DecSep, "[{0} {1} {2} {3}]", ToPt(LeftPos), ToPt(BottomPos), ToPt(RightPos), ToPt(TopPos)));
Annotation.AddToDictionary("/Subtype", "/Link");
// add annotation object to page dictionary
String Value = GetDictionaryValue("/Annots");
if (Value == null)
{
AddToDictionary("/Annots", String.Format("[{0} 0 R]", Annotation.ObjectNumber));
}
else
{
AddToDictionary("/Annots", Value.Replace("]", String.Format(" {0} 0 R]", Annotation.ObjectNumber)));
}
// exit
return;
}