/**
* Adds new content object before the existing content objects.
* The original code was provided by Stefan Ostermann author of ScribMaster and HandWrite Pro.
* Additional code to handle PDFs with indirect array of stream objects was written by EDragoev.
*
* @param content
* @param objects
*/
public void AddPrefixContent(byte[] content, List <PDFobj> objects)
{
PDFobj obj = new PDFobj();
obj.SetNumber(objects.Count + 1);
obj.SetStream(content);
objects.Add(obj);
String objNumber = obj.number.ToString();
for (int i = 0; i < dict.Count; i++)
{
if (dict[i].Equals("/Contents"))
{
i += 1;
String token = dict[i];
if (token.Equals("["))
{
// Array of content object streams
i += 1;
dict.Insert(i, "R");
dict.Insert(i, "0");
dict.Insert(i, objNumber);
return;
}
else
{
// Single content object
PDFobj obj2 = objects[Int32.Parse(token) - 1];
if (obj2.data == null && obj2.stream == null)
{
// This is not a stream object!
for (int j = 0; j < obj2.dict.Count; j++)
{
if (obj2.dict[j].Equals("["))
{
j += 1;
obj2.dict.Insert(j, "R");
obj2.dict.Insert(j, "0");
obj2.dict.Insert(j, objNumber);
return;
}
}
}
dict.Insert(i, "[");
dict.Insert(i + 4, "]");
i += 1;
dict.Insert(i, "R");
dict.Insert(i, "0");
dict.Insert(i, objNumber);
return;
}
}
}
}
public void AddContent(byte[] content, SortedDictionary <Int32, PDFobj> objects)
{
PDFobj obj = new PDFobj();
int maxObjNumber = -1;
foreach (int number in objects.Keys)
{
if (number > maxObjNumber)
{
maxObjNumber = number;
}
}
obj.SetNumber(maxObjNumber + 1);
obj.SetStream(content);
objects.Add(obj.GetNumber(), obj);
int index = -1;
bool single = false;
for (int i = 0; i < dict.Count; i++)
{
if (dict[i].Equals("/Contents"))
{
String str = dict[++i];
if (str.Equals("["))
{
for (;;)
{
str = dict[++i];
if (str.Equals("]"))
{
index = i;
break;
}
++i; // 0
++i; // R
}
}
else
{
// Single content object
index = i;
single = true;
}
break;
}
}
if (single)
{
dict.Insert(index, "[");
dict.Insert(index + 4, "]");
dict.Insert(index + 4, "R");
dict.Insert(index + 4, "0");
dict.Insert(index + 4, obj.number.ToString());
}
else
{
dict.Insert(index, "R");
dict.Insert(index, "0");
dict.Insert(index, obj.number.ToString());
}
}
/**
* Adds new content object before the existing content objects.
* The original code was provided by Stefan Ostermann author of ScribMaster and HandWrite Pro.
* Additional code to handle PDFs with indirect array of stream objects was written by EDragoev.
*
* @param content
* @param objects
*/
public void AddPrefixContent(
byte[] content, SortedDictionary <Int32, PDFobj> objects)
{
PDFobj obj = new PDFobj();
int maxObjNumber = -1;
foreach (int number in objects.Keys)
{
if (number > maxObjNumber)
{
maxObjNumber = number;
}
}
obj.SetNumber(maxObjNumber + 1);
obj.SetStream(content);
objects[obj.GetNumber()] = obj;
String objNumber = obj.number.ToString();
for (int i = 0; i < dict.Count; i++)
{
if (dict[i].Equals("/Contents"))
{
i += 1;
String token = dict[i];
if (token.Equals("["))
{
// Array of content object streams
i += 1;
dict.Insert(i, "R");
dict.Insert(i, "0");
dict.Insert(i, objNumber);
return;
}
else
{
// Single content object
PDFobj obj2 = objects[Int32.Parse(token)];
if (obj2.data == null && obj2.stream == null)
{
// This is not a stream object!
for (int j = 0; j < obj2.dict.Count; j++)
{
if (obj2.dict[j].Equals("["))
{
j += 1;
obj2.dict.Insert(j, "R");
obj2.dict.Insert(j, "0");
obj2.dict.Insert(j, objNumber);
return;
}
}
}
dict.Insert(i, "[");
dict.Insert(i + 4, "]");
i += 1;
dict.Insert(i, "R");
dict.Insert(i, "0");
dict.Insert(i, objNumber);
return;
}
}
}
}
public void AddContent(byte[] content, SortedDictionary<Int32, PDFobj> objects)
{
PDFobj obj = new PDFobj();
int maxObjNumber = -1;
foreach (int number in objects.Keys) {
if (number > maxObjNumber) { maxObjNumber = number; }
}
obj.SetNumber(maxObjNumber + 1);
obj.SetStream(content);
objects.Add(obj.GetNumber(), obj);
int index = -1;
bool single = false;
for (int i = 0; i < dict.Count; i++) {
if (dict[i].Equals("/Contents")) {
String str = dict[++i];
if (str.Equals("[")) {
for (;;) {
str = dict[++i];
if (str.Equals("]")) {
index = i;
break;
}
++i; // 0
++i; // R
}
}
else {
// Single content object
index = i;
single = true;
}
break;
}
}
if (single) {
dict.Insert(index, "[");
dict.Insert(index + 4, "]");
dict.Insert(index + 4, "R");
dict.Insert(index + 4, "0");
dict.Insert(index + 4, obj.number.ToString());
}
else {
dict.Insert(index, "R");
dict.Insert(index, "0");
dict.Insert(index, obj.number.ToString());
}
}
