private void GetDescriptorInfo()
{
BAG activeEnvironmentGroup = pageContainers[curPageIndex].GetStructure <BAG>();
if (activeEnvironmentGroup != null)
{
aeContainer = activeEnvironmentGroup.LowestLevelContainer;
// Grab the Presentation Text Descriptor and store the units per base and base unit
PGD pageDescriptor = pageContainers[curPageIndex].GetStructure <PGD>();
PTD1 descriptor1 = pageContainers[curPageIndex].GetStructure <PTD1>();
PTD2 descriptor2 = pageContainers[curPageIndex].GetStructure <PTD2>();
if (descriptor2 != null)
{
unitsPerBase = descriptor2.UnitsPerXBase;
measurement = descriptor2.BaseUnit;
}
else if (descriptor1 != null)
{
unitsPerBase = descriptor1.UnitsPerXBase;
measurement = descriptor1.BaseUnit;
}
else
{
unitsPerBase = pageDescriptor.UnitsPerXBase;
measurement = pageDescriptor.BaseUnit;
}
}
else
{
throw new NotImplementedException("Presentation text could not be displayed - no active environment group found.");
}
}
/// <summary>
/// Adds a new page container with its required fields to an existing document container
/// </summary>
/// <param name="docContainer">The container of the existing document in the AFP to add the page to</param>
/// <param name="pageName">The optional 8 character name of the new page</param>
/// <param name="groupName">The optional 8 character name of the new active environment group</param>
/// <param name="xUnitsPer10Inches">The number of horizontal measurement units on a page/presentation space for every 10 inches</param>
/// <param name="yUnitsPer10Inches">The number of vertical units on a page/presentation space for every 10 inches</param>
/// <param name="pageUnitWidth">The number of units that represent the page's width. To convert to inches: (pageUnitWidth / xUnitsPer10Inches) * 10</param>
/// <param name="pageUnitHeight">The number of units that represent the page's height. To convert to inches: (pageUnitHeight / yUnitsPer10Inches) * 10</param>
/// <returns>The resulting page's container</returns>
public Container AddPageToDocument(Container docContainer, string pageName = "", string groupName = "", ushort xUnitsPer10Inches = 3000,
ushort yUnitsPer10Inches = 3000, ushort pageUnitWidth = 2550, ushort pageUnitHeight = 3300)
{
Container pageContainer = null;
// Verify the container parameter is truly a document
if (!(docContainer.Structures[0] is BDT && docContainer.Structures.Last() is EDT))
{
throw new Exception("The passed container parameter does not appear to be a Document container.");
}
// Verify the document exists in the container (and store index to insert if it's ok)
int indexToInsert = 0;
for (int i = 0; i < Fields.Count; i++)
{
// As soon as we find the begin tag, verify each field in the container matches and break
if (Fields[i] == docContainer.Structures[0])
{
for (int j = 0; j < docContainer.Structures.Count; j++)
{
if (Fields[i + j] != docContainer.Structures[j])
{
throw new Exception("Invalid container - does not exist in list of fields.");
}
}
indexToInsert = (i + docContainer.Structures.Count) - 1;
break;
}
}
// Create page tags
BPG newBPG = new BPG(pageName);
EPG newEPG = new EPG(pageName);
// A page needs an active environment group
BAG newBAG = new BAG(groupName);
EAG newAEG = new EAG(groupName);
// An active environment group in a page needs both page and presentation text descriptor fields
PGD newPGD = new PGD(xUnitsPer10Inches, yUnitsPer10Inches, pageUnitWidth, pageUnitHeight);
PTD1 newPTD = new PTD1(xUnitsPer10Inches, yUnitsPer10Inches, pageUnitWidth, pageUnitHeight);
// Build the list of new fields and add them to the end of the document
List <StructuredField> newFields = new List <StructuredField>()
{
newBPG, newBAG, newPGD, newPTD, newAEG, newEPG
};
AddFields(newFields, indexToInsert);
// Set and return the created page's container
pageContainer = newBPG.LowestLevelContainer;
return(pageContainer);
}
