//entering values in map inside nodes and arranging those nodes in Priority queue with smallest frequencies in front
public PQueue.PriorityQueue nodesinQueue(Dictionary <char, int> Dic)
{
PQueue.cNode node = new PQueue.cNode(); //node created
PQueue.PriorityQueue pQueue = new PQueue.PriorityQueue(); //queue created
foreach (KeyValuePair <char, int> kvp in Dic) //reading from frequency dictionary
{
node.value = kvp.Key;
node.frequency = kvp.Value; //setting the values of node
pQueue.insertWithPriority(node); //entering the node
node = new PQueue.cNode();
}
return(pQueue);
}
//calculating codes making tree
public PQueue.cNode HuffmanEncoding(PQueue.PriorityQueue pQueue)
{
int n = pQueue.count;
while (n != 1)
{
PQueue.cNode node = new PQueue.cNode();
node.leftZero = pQueue.remove();
node.rightOne = pQueue.remove();
node.frequency = node.leftZero.frequency + node.rightOne.frequency;
node.value = '~'; //just adding a temp value to middle nodes
pQueue.insertWithPriority(node);
n = pQueue.count;
}
return(pQueue.Top());
}
private void Compression_Click(object sender, RoutedEventArgs e)
{
string filename = fileName;
//myObj.comleteFlag = 0;
if (fileExt == ".pdf" || fileExt == ".docx")
{
if (fileExt == ".docx")
{
try
{
// Open a doc file.
Application app = new Application();
Microsoft.Office.Interop.Word.Document document = app.Documents.Open(fileName);
// Select all words from word file
int total = document.Words.Count;
for (int i = 1; i <= total; i++)
{
// Reading from word document into a string
content += document.Words[i].Text;
}
// Close word.
Console.WriteLine(content);
app.Quit();
}
catch
{
MessageBox.Show("File is used by another Process");
throw new ArgumentException("File is used by another Process.");
}
}
if (fileExt == ".pdf")
{
try
{
StringBuilder fileContent = new StringBuilder();
using (PdfReader pdfReader = new PdfReader(filename))
{
for (int k = 1; k <= pdfReader.NumberOfPages; k++)
{
fileContent.Append(PdfTextExtractor.GetTextFromPage(pdfReader, k));
}
}
content = fileContent.ToString();
}
catch
{
MessageBox.Show("File is used by another Process");
throw new ArgumentException("File is used by another Process.");
}
}
//string content;
Dictionary <char, int> Dic = new Dictionary <char, int>();
Dic = myObj.frequencyPDF(content);
// myObj.printMap(Dic);
//getting frequency
//entering data in nodes then storing them in queue
PQueue.PriorityQueue pQueue = new PQueue.PriorityQueue();
pQueue = myObj.nodesinQueue(Dic);
// pQueue.print();
//creating encooding tree
myObj.root = myObj.HuffmanEncoding(pQueue);
PQueue.cNode top = myObj.root; //temporary storing the value
// Console.WriteLine(top.getValue());
myObj.HuffCode(top, "");
// myObj.printCodes(myObj.HuffmanCode);
}
else
{
FileStream fs;
try
{
fs = File.OpenRead(fileName);
}
catch
{
MessageBox.Show("No File has been Uploaded");
throw new ArgumentException("A file should be uploaded.");
}
//String fs = File.ReadAllText(fileName);
Dictionary <char, int> Dic = new Dictionary <char, int>();
//Dic = myObj.frequency(fs);
Dic = myObj.frequency(fs);
// myObj.printMap(Dic);
//getting frequency
//entering data in nodes then storing them in queue
PQueue.PriorityQueue pQueue = new PQueue.PriorityQueue();
pQueue = myObj.nodesinQueue(Dic);
// pQueue.print();
//creating encooding tree
myObj.root = myObj.HuffmanEncoding(pQueue);
PQueue.cNode top = myObj.root; //temporary storing the value
// Console.WriteLine(top.getValue());
myObj.HuffCode(top, "");
// myObj.printCodes(myObj.HuffmanCode);
top = myObj.root; //temporary storing the value
}
MessageBox.Show("Compress Done Save File.");
}