Printing: Replace WinziPrint with iText
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@@ -1,103 +1,148 @@
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using Elwig.Windows;
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using iText.Html2pdf;
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using iText.Kernel.Pdf;
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using iText.Kernel.Pdf.Event;
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using iText.Kernel.Utils;
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using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.Drawing.Printing;
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using System.IO;
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using System.Linq;
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using System.Net.Sockets;
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using System.Reflection;
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using System.Text.RegularExpressions;
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using System.Threading;
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using System.Threading.Tasks;
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using System.Windows;
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namespace Elwig.Helpers.Printing {
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public static class Pdf {
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private static readonly string WinziPrint = (Assembly.GetEntryAssembly()?.Location.Contains(@"\bin\") ?? false) ?
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Path.Combine(Assembly.GetEntryAssembly()!.Location.Split(@"\bin\")[0], "../Installer/Files/WinziPrint.exe") :
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new string[] { App.InstallPath }
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.Union(Environment.GetEnvironmentVariable("PATH")?.Split(';') ?? [])
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.Select(x => Path.Combine(x, "WinziPrint.exe"))
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.Where(File.Exists)
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.FirstOrDefault() ?? throw new FileNotFoundException("WiniPrint executable not found");
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private static Process? WinziPrintProc;
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public static bool IsReady => WinziPrintProc != null;
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public static async Task Init(Action? evtHandler = null) {
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public static Task Init(Action? evtHandler = null) {
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PdfiumNative.FPDF_InitLibrary();
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// NOTE: If the WinziPrint daemon is already running this will succeed, but the process will fail.
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// Should be no problem, as long as the daemon is not closed
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var p = new Process() { StartInfo = new() {
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FileName = WinziPrint,
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CreateNoWindow = true,
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UseShellExecute = false,
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RedirectStandardOutput = true,
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} };
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p.StartInfo.ArgumentList.Add("-D");
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p.StartInfo.ArgumentList.Add("-d");
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p.StartInfo.ArgumentList.Add(App.TempPath);
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p.Start();
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await p.StandardOutput.ReadLineAsync();
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WinziPrintProc = p;
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evtHandler?.Invoke();
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return Task.CompletedTask;
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}
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public static Task Cleanup() {
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WinziPrintProc?.Kill(true);
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WinziPrintProc?.Close();
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PdfiumNative.FPDF_DestroyLibrary();
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return Task.CompletedTask;
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}
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public static async Task<(int Pages, IEnumerable<int> PerDoc)> Convert(string htmlPath, string pdfPath, bool doublePaged = false, CancellationToken? cancelToken = null, IProgress<double>? progress = null) {
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return await Convert([htmlPath], pdfPath, doublePaged, cancelToken, progress);
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public static (int Pages, IEnumerable<int> PerDoc) Convert(string htmlPath, string pdfPath, Documents.Document? doc = null) {
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int nPages;
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using var html = File.Open(htmlPath, FileMode.Open);
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using var writer = new PdfWriter(pdfPath);
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using var pdf = new PdfDocument(writer);
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var footerHandler = new FooterEventHandler(doc);
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pdf.AddEventHandler(PdfDocumentEvent.END_PAGE, footerHandler);
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pdf.AddEventHandler(PdfDocumentEvent.START_DOCUMENT_CLOSING, footerHandler);
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// TODO embed fonts?
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//pdf.AddFont(PdfFontFactory.CreateFont(StandardFonts.TIMES_ROMAN));
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HtmlConverter.ConvertToPdf(html, pdf);
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nPages = footerHandler.NumberOfPages;
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return (nPages, [nPages]);
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}
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public static async Task<(int Pages, IEnumerable<int> PerDoc)> Convert(IEnumerable<string> htmlPath, string pdfPath, bool doublePaged = false, CancellationToken? cancelToken = null, IProgress<double>? progress = null) {
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if (WinziPrintProc == null) throw new InvalidOperationException("The WinziPrint process has not been initialized yet");
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progress?.Report(0.0);
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using var client = new TcpClient("127.0.0.1", 30983);
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using var stream = client.GetStream();
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string cnxId;
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using var reader = new StreamReader(stream);
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var first = await reader.ReadLineAsync() ?? throw new IOException("Invalid response from WinziPrint");
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if (first.StartsWith("id:")) {
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cnxId = first[3..].Trim();
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} else {
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throw new IOException("Invalid response from WinziPrint");
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}
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await stream.WriteAsync(Utils.UTF8.GetBytes(
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"-e utf-8;-p;" + (doublePaged ? "-2;" : "") +
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$"{string.Join(';', htmlPath)};{pdfPath}" +
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"\r\n"));
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bool cancelled = false;
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while (true) {
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if (!cancelled && (cancelToken?.IsCancellationRequested ?? false)) {
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try {
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using var cancelClient = new TcpClient("127.0.0.1", 30983);
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using var cancelStream = cancelClient.GetStream();
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using var cancelReader = new StreamReader(cancelStream);
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await cancelReader.ReadLineAsync();
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await cancelStream.WriteAsync(Utils.UTF8.GetBytes($"cancel;{cnxId}\r\n"));
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} catch { }
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cancelled = true;
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public static (int Pages, IEnumerable<int> PerDoc) Convert(IEnumerable<string> inputFiles, string pdfPath, bool doublePaged = false, IEnumerable<Documents.Document>? docs = null, CancellationToken? cancelToken = null, IProgress<double>? progress = null) {
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var tmpFileNames = new List<string>();
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var pageNums = new List<int>();
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var tmpPageNums = new List<int>();
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var htmlFiles = inputFiles
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.Where(f => !f.EndsWith(".pdf", StringComparison.OrdinalIgnoreCase))
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.Select(f => f.TrimStart('!', '#'))
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.ToList();
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try {
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for (int i = 0; i < htmlFiles.Count; i++) {
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string tmpFile = $"{pdfPath}.{i:0000}.part";
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tmpFileNames.Add(tmpFile);
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var (pages, _) = Convert(htmlFiles[i], tmpFile, docs?.ElementAt(i));
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tmpPageNums.Add(pages);
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}
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var line = await reader.ReadLineAsync() ?? throw new IOException("Invalid response from WinziPrint");
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if (line.StartsWith("error:")) {
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var msg = line[6..].Trim();
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if (msg == "aborted")
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throw new OperationCanceledException("Dokumentenerzeugung abgebrochen!");
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throw new IOException($"WinziPrint: {msg}");
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} else if (line.StartsWith("progress:")) {
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var parts = line[9..].Trim().Split('/').Select(int.Parse).ToArray();
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progress?.Report(100.0 * parts[0] / parts[1]);
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} else if (line.StartsWith("success:")) {
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var m = Regex.Match(line, @"([0-9]+) pages \(([0-9, ]+)\)");
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return (int.Parse(m.Groups[1].Value), m.Groups[2].Value.Split(", ").Select(int.Parse).ToList());
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using var writer = new PdfWriter(pdfPath);
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using var mergedPdf = new PdfDocument(writer);
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var merger = new PdfMerger(mergedPdf);
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PdfPage? letterheadPage = null;
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int letterheadInsertIndex = 0;
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int letterheadDocIndex = 0;
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for (int i = 0; i < inputFiles.Count(); i++) {
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var fileName = inputFiles.ElementAt(i);
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int p0 = mergedPdf.GetNumberOfPages();
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if (letterheadPage != null && fileName.StartsWith('#')) {
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if (mergedPdf.GetNumberOfPages() <= letterheadInsertIndex) {
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mergedPdf.AddPage(letterheadPage.CopyTo(mergedPdf));
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mergedPdf.AddNewPage();
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} else {
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mergedPdf.AddPage(letterheadInsertIndex + 1, letterheadPage.CopyTo(mergedPdf));
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mergedPdf.AddNewPage(letterheadInsertIndex + 2);
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}
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pageNums[letterheadDocIndex] = 1;
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letterheadPage = null;
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}
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if (fileName.EndsWith(".pdf", StringComparison.OrdinalIgnoreCase)) {
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var cleanName = fileName.TrimStart('!', '#');
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if (doublePaged && fileName.StartsWith('#')) {
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using var reader = new PdfReader(cleanName);
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using var src = new PdfDocument(reader);
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letterheadPage = src.GetPage(1).CopyTo(mergedPdf);
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letterheadInsertIndex = p0;
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letterheadDocIndex = i;
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} else {
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using var reader = new PdfReader(cleanName);
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using var src = new PdfDocument(reader);
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merger.Merge(src, 1, src.GetNumberOfPages());
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}
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} else {
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string tmpFile = tmpFileNames[i];
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if (doublePaged && fileName.StartsWith('#')) {
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using var reader = new PdfReader(tmpFile);
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using var src = new PdfDocument(reader);
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letterheadPage = src.GetPage(1).CopyTo(mergedPdf);
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letterheadInsertIndex = p0;
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letterheadDocIndex = i;
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} else {
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using var reader = new PdfReader(tmpFile);
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using var src = new PdfDocument(reader);
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merger.Merge(src, 1, tmpPageNums[i]);
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}
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}
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int p1 = mergedPdf.GetNumberOfPages();
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pageNums.Add(p1 - p0);
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if (doublePaged && fileName[0] != '!' && fileName[0] != '#' && mergedPdf.GetNumberOfPages() % 2 != 0) {
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if (letterheadPage != null) {
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mergedPdf.AddPage(letterheadPage.CopyTo(mergedPdf));
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letterheadPage = null;
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} else {
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mergedPdf.AddNewPage();
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}
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}
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}
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if (letterheadPage != null) {
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if (mergedPdf.GetNumberOfPages() <= letterheadInsertIndex) {
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mergedPdf.AddPage(letterheadPage.CopyTo(mergedPdf));
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mergedPdf.AddNewPage();
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} else {
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mergedPdf.AddPage(letterheadInsertIndex + 1, letterheadPage.CopyTo(mergedPdf));
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mergedPdf.AddNewPage(letterheadInsertIndex + 2);
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}
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pageNums[letterheadDocIndex] = 1;
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}
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} finally {
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foreach (var tmp in tmpFileNames) {
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if (File.Exists(tmp)) File.Delete(tmp);
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}
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}
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return (pageNums.Sum(), pageNums);
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}
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public static void Show(TempFile file, string title) {
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