public PdfMatches Search(string text, bool matchCase, bool wholeWord, int startPage, int endPage)
{
var matches = new List <PdfMatch>();
for (int page = startPage; page <= endPage; page++)
{
using (var pageData = new PageData(_document, _form, page))
{
NativePdfiumMethods.FPDF_SEARCH_FLAGS flags = 0;
if (matchCase)
{
flags |= NativePdfiumMethods.FPDF_SEARCH_FLAGS.FPDF_MATCHCASE;
}
if (wholeWord)
{
flags |= NativePdfiumMethods.FPDF_SEARCH_FLAGS.FPDF_MATCHWHOLEWORD;
}
var handle = NativePdfiumMethods.FPDFText_FindStart(pageData.TextPage, FPDFEncoding.GetBytes(text), flags, 0);
try
{
while (NativePdfiumMethods.FPDFText_FindNext(handle))
{
int index = NativePdfiumMethods.FPDFText_GetSchResultIndex(handle);
int matchLength = NativePdfiumMethods.FPDFText_GetSchCount(handle);
var result = new byte[(matchLength + 1) * 2];
NativePdfiumMethods.FPDFText_GetText(pageData.TextPage, index, matchLength, result);
string match = FPDFEncoding.GetString(result, 0, matchLength * 2);
double left, right, bottom, top;
NativePdfiumMethods.FPDFText_GetCharBox(pageData.TextPage, index, out left, out right, out bottom, out top);
matches.Add(new PdfMatch(
new PointF((float)left, (float)top),
match,
page
));
}
}
finally
{
NativePdfiumMethods.FPDFText_FindClose(handle);
}
}
}
return(new PdfMatches(startPage, endPage, matches));
}