private List <RectAndText> GetTextAndCoords(string file, string textToBeFound)
{
List <RectAndText> returnRATs = new List <RectAndText>();
StringBuilder text = new StringBuilder();
ITextExtractionStrategy strategy = new MyLocationTextExtractionStrategy();
using (PdfReader reader = new PdfReader(file))
{
for (int page = 1; page <= reader.NumberOfPages; page++)
{
((MyLocationTextExtractionStrategy)strategy).Page = page;
string currentText = PdfTextExtractor.GetTextFromPage(reader, page, strategy);
text.Append(currentText);
}
}
foreach (RectAndText RAT in ((MyLocationTextExtractionStrategy)strategy).myPoints)
{
if (RAT.Text.Equals(textToBeFound))
{
logger.Debug("Text found: " + RAT.Text + " Page: " + RAT.Page + " Coords: " + RAT.Rect.GetTop(0) + ", " + RAT.Rect.GetBottom(0) + ", " + RAT.Rect.GetLeft(0) + ", " + RAT.Rect.GetRight(0));
returnRATs.Add(RAT);
}
}
return(returnRATs);
}
private void ReplaceText(string textToBeSearched, string textToAdd, string outputFilePath, string inputFilePath)
{
try
{
using (Stream inputPdfStream = new FileStream(inputFilePath, FileMode.Open, FileAccess.Read, FileShare.Read))
using (Stream outputPdfStream = new FileStream(outputFilePath, FileMode.Create, FileAccess.Write, FileShare.ReadWrite))
using (Stream outputPdfStream2 = new FileStream(outputFilePath, FileMode.Create, FileAccess.ReadWrite, FileShare.ReadWrite))
{
//Opens the unmodified PDF for reading
PdfReader reader = new PdfReader(inputPdfStream);
//Creates a stamper to put an image on the original pdf
PdfStamper stamper = new PdfStamper(reader, outputPdfStream); //{ FormFlattening = true, FreeTextFlattening = true };
for (var i = 1; i <= reader.NumberOfPages; i++)
{
var tt = new MyLocationTextExtractionStrategy(textToBeSearched);
var ex = PdfTextExtractor.GetTextFromPage(reader, i, tt); // ex will be holding the text, although we just need the rectangles [RectAndText class objects]
foreach (var p in tt.myPoints)
{
//Creates an image that is the size i need to hide the text i'm interested in removing
Bitmap transparentBitmap = new Bitmap((int)p.Rect.Width, (int)p.Rect.Height);
transparentBitmap.MakeTransparent();
iTextSharp.text.Image image = iTextSharp.text.Image.GetInstance(transparentBitmap, new BaseColor(255, 255, 255));
//Sets the position that the image needs to be placed (ie the location of the text to be removed)
image.SetAbsolutePosition(p.Rect.Left, (p.Rect.Top - 15));
//Adds the image to the output pdf
stamper.GetOverContent(i).AddImage(image, true); // i stands for the page no.
PdfContentByte cb = stamper.GetOverContent(i);
// 中文自型設定------------
//int fontStyle = 1; // 設定為粗體
string fontPath = "c:\\windows\\fonts\\KAIU.TTF";
BaseFont bf = BaseFont.CreateFont(fontPath, BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);
//----------------------------------
// select the font properties
//BaseFont bf = BaseFont.CreateFont(BaseFont.HELVETICA, BaseFont.CP1252, BaseFont.NOT_EMBEDDED);
cb.SetColorFill(BaseColor.BLACK);
cb.SetFontAndSize(bf, 14);
// write the text in the pdf content
cb.BeginText();
// put the alignment and coordinates here
cb.ShowTextAligned(1, textToAdd, p.Rect.Left + 14, p.Rect.Top - 10, 0);
cb.EndText();
}
}
//Creates the first copy of the outputted pdf
stamper.Close();
}
}
catch (Exception ex)
{
}
}
public void ProcessPdf(StringComparison sc, string sourceFile, string destinationFile, string searchTerm, int excelRowNumber, List <KeyValuePair <int, string> > searchValues)
{
var sArr = searchTerm.Split(',');
myProgressBar.Maximum = searchValues.Count;
bool found = false;
Cursor = Cursors.WaitCursor;
if (File.Exists(sourceFile))
{
var pReader = new PdfReader(sourceFile);
myProgressBar.Value = 0;
PdfStamper stamper = null;
foreach (var item in searchValues)
{
var newStrings = item.Value.Split(',');
var foundText = string.Empty;
foreach (var search in newStrings)
{
for (var page = 1; page <= pReader.NumberOfPages; page++)
{
var t = new MyLocationTextExtractionStrategy(search, CompareOptions.Ordinal);
using (var r = new PdfReader(sourceFile))
{
var ex = PdfTextExtractor.GetTextFromPage(r, 1, t);
}
var matchesFound = t.MyPoints;
if (t.MyPoints.Count > 0)
{
found = true;
if (!string.IsNullOrEmpty(search))
{
foundText += "," + search;
}
if (!File.Exists(destinationFile))
{
stamper = new PdfStamper(pReader, new FileStream(destinationFile, FileMode.Create));
}
if (!_fileList.Contains(destinationFile))
{
_fileList.Add(destinationFile);
}
var cb = stamper.GetUnderContent(page);
cb.SetColorFill(BaseColor.BLACK);
foreach (var rect in matchesFound)
{
if (rect.Text == search)
{
cb.Rectangle(rect.Rect.Left, rect.Rect.Bottom, rect.Rect.Width, rect.Rect.Height);
float[] quad =
{
rect.Rect.Left,
rect.Rect.Bottom,
rect.Rect.Right,
rect.Rect.Bottom,
rect.Rect.Left,
rect.Rect.Top,
rect.Rect.Right,
rect.Rect.Top
};
var highlight = PdfAnnotation.CreateMarkup(stamper.Writer, rect.Rect,
Constants.vbNull.ToString(), PdfAnnotation.MARKUP_HIGHLIGHT, quad);
highlight.Color = BaseColor.YELLOW;
stamper.AddAnnotation(highlight, page);
}
}
}
}
}
if (found && !string.IsNullOrEmpty(foundText))
{
if (sourceFile == txtFirstPDF.Text)
{
_foundValuesInFirstPdf.Add(new KeyValuePair <int, string>(item.Key, foundText.Substring(1)));
}
else
{
_foundValuesInSecindPdf.Add(new KeyValuePair <int, string>(item.Key, foundText.Substring(1)));
}
}
myProgressBar.Value = myProgressBar.Value + 1;
}
if (stamper != null)
{
stamper.Close();
}
}
this.Cursor = Cursors.Default;
}
public static List <List <string> > getLineText(string path, int page, float[] coord)
{
//Create an instance of our strategy
var t = new MyLocationTextExtractionStrategy();
//Parse page 1 of the document above
using (var r = new PdfReader(path))
{
for (var i = 0; i < r.NumberOfPages; i++)
{
//var ex = iTextSharp.text.pdf.parser.PdfTextExtractor.GetTextFromPage(r, 2, t);
}
// Calling this function adds all the chunks with their coordinates to the
// 'myPoints' variable of 'MyLocationTextExtractionStrategy' Class
var ex = iTextSharp.text.pdf.parser.PdfTextExtractor.GetTextFromPage(r, page, t);
}
// List of columns in one line
List <string> lineWord = new List <string>();
// temporary list for working around appending the <List<List<string>>
List <string> tempWord;
// List of rows. rows are list of string
List <List <string> > lineText = new List <List <string> >();
// List consisting list of chunks related to each line
List <List <RectAndText> > lineChunksList = new List <List <RectAndText> >();
//List consisting the chunks for whole page;
List <RectAndText> chunksList;
// List consisting the list of Bottom coord of the lines present in the page
List <float> bottomPointList = new List <float>();
//Getting List of Coordinates of Lines in the page no matter it's a table or not
foreach (var i in t.myPoints)
{
// If the coords passed to the function is not null then process the part in the
// given coords of the page otherwise process the whole page
if (coord != null)
{
if (i.Rect.Left >= coord[0] &&
i.Rect.Bottom >= coord[1] &&
i.Rect.Right <= coord[2] &&
i.Rect.Top <= coord[3])
{
float bottom = i.Rect.Bottom;
if (bottomPointList.Count == 0)
{
bottomPointList.Add(bottom);
}
else if (Math.Abs(bottomPointList.Last() - bottom) > 3)
{
bottomPointList.Add(bottom);
}
}
}
// else process the whole page
else
{
float bottom = i.Rect.Bottom;
if (bottomPointList.Count == 0)
{
bottomPointList.Add(bottom);
}
else if (Math.Abs(bottomPointList.Last() - bottom) > 3)
{
bottomPointList.Add(bottom);
}
}
}
// Sometimes the above List will be having some elements which are from the same line but are
// having different coordinates due to some characters like " ",".",etc.
// And these coordinates will be having the difference of at most 4 points between
// their bottom coordinates.
//so to remove those elements we create two new lists which we need to remove from the original list
//This list will be having the elements which are having different but a little difference in coordinates
List <float> removeList = new List <float>();
// This list is having the elements which are having the same coordinates
List <float> sameList = new List <float>();
// Here we are adding the elements in those two lists to remove the elements
// from the original list later
for (var i = 0; i < bottomPointList.Count; i++)
{
var basePoint = bottomPointList[i];
for (var j = i + 1; j < bottomPointList.Count; j++)
{
var comparePoint = bottomPointList[j];
//here we are getting the elements with same coordinates
if (Math.Abs(comparePoint - basePoint) == 0)
{
sameList.Add(comparePoint);
}
// here ae are getting the elements which are having different but the diference
// of less than 4 points
else if (Math.Abs(comparePoint - basePoint) < 4)
{
removeList.Add(comparePoint);
}
}
}
// Here we are removing the matching elements of remove list from the original list
bottomPointList = bottomPointList.Where(item => !removeList.Contains(item)).ToList();
//Here we are removing the first matching element of same list from the original list
foreach (var r in sameList)
{
bottomPointList.Remove(r);
}
// Here we are getting the characters of the same line in a List 'chunkList'.
foreach (var bottomPoint in bottomPointList)
{
chunksList = new List <RectAndText>();
for (int i = 0; i < t.myPoints.Count; i++)
{
// If the character is having same bottom coord then add it to chunkList
if (bottomPoint == t.myPoints[i].Rect.Bottom)
{
chunksList.Add(t.myPoints[i]);
}
// If character is having a difference of less than 3 in the bottom coord then also
// add it to chunkList because the coord of the next line will differ at least 10 points
// from the coord of current line
else if (Math.Abs(t.myPoints[i].Rect.Bottom - bottomPoint) < 3)
{
chunksList.Add(t.myPoints[i]);
}
}
// Here we are adding the chunkList related to each line
lineChunksList.Add(chunksList);
}
bool sameLine = false;
//Here we are looping through the lines consisting the chunks related to each line
foreach (var linechunk in lineChunksList)
{
var text = "";
// Here we are looping through the chunks of the specific line to put the texts
// that are having a cord jump in their left coordinates.
// because only the line having table will be having the coord jumps in their
// left coord not the line having texts
for (var i = 0; i < linechunk.Count - 1; i++)
{
// If the coord is having a jump of less than 3 points then it will be in the same
// column otherwise the next chunk belongs to different column
if (Math.Abs(linechunk[i].Rect.Right - linechunk[i + 1].Rect.Left) < 3)
{
if (i == linechunk.Count - 2)
{
text += linechunk[i].Text + linechunk[i + 1].Text;
}
else
{
text += linechunk[i].Text;
}
}
else
{
if (i == linechunk.Count - 2)
{
// add the text to the column and set the value of next column to ""
text += linechunk[i].Text;
// this is the list of columns in other word its the row
lineWord.Add(text);
text = "";
text += linechunk[i + 1].Text;
lineWord.Add(text);
text = "";
}
else
{
text += linechunk[i].Text;
lineWord.Add(text);
text = "";
}
}
}
if (text.Trim() != "")
{
lineWord.Add(text);
}
// creating a temporary list of strings for the List<List<string>> manipulation
tempWord = new List <string>();
tempWord.AddRange(lineWord);
// "lineText" is the type of List<List<string>>
// this is our list of rows. and rows are List of strings
// here we are adding the row to the list of rows
lineText.Add(tempWord);
lineWord.Clear();
}
return(lineText);
}
