Printing: Replace WinziPrint with iText

2026-02-18 23:00:21 +01:00
parent 751246537e
commit 4bd68eb16b
17 changed files with 341 additions and 234 deletions
--- a/Elwig/Documents/BusinessDocument.cs
+++ b/Elwig/Documents/BusinessDocument.cs
@@ -21,14 +21,6 @@ namespace Elwig.Documents {
            IncludeSender = includeSender;
            var c = App.Client;
            Header = $"<div class='name'>{c.Name}</div><div class='suffix'>{c.NameSuffix}</div><div class='type'>{c.NameTypeFull}</div>";
-            Footer = Utils.GenerateFooter("<br/>", " \u00b7 ")
-                .Item(c.NameFull).NextLine()
-                .Item(c.Address).Item($"{c.Plz} {c.Ort}").Item("Österreich").Item("Tel.", c.PhoneNr).Item("Fax", c.FaxNr).NextLine()
-                .Item(c.EmailAddress != null ? $"<a href=\"mailto:{c.Name} {c.NameSuffix} <{c.EmailAddress}>\">{c.EmailAddress}</a>" : null)
-                    .Item(c.Website != null ? $"<a href=\"http://{c.Website}/\">{c.Website}</a>" : null)
-                    .Item("Betriebs-Nr.", c.LfbisNr).Item("Bio-KSt.", c.OrganicAuthority).NextLine()
-                .Item("UID", c.UstIdNr).Item("BIC", c.Bic).Item("IBAN", c.Iban)
-                .ToString();
            var uid = (m.UstIdNr ?? "-") + (m.IsBuchführend ? "" : " <i>(pauschaliert)</i>");
            Aside = $"<table><colgroup><col span='1' style='width: 22.5mm;'/><col span='1' style='width: 42.5mm;'/></colgroup>" +
                $"<thead><tr><th colspan='2'>Mitglied</th></tr></thead><tbody>" +
--- a/Elwig/Documents/Document.Page.css
+++ b/Elwig/Documents/Document.Page.css
@@ -1,19 +1,4 @@

-.m1, .m2, .m3 {
-    height: 0;
-    width: 10mm;
-    position: fixed;
-    left: -25mm;
-    border-top: var(--border-thickness) solid black;
-}
-.m1.r, .m2.r, .m3.r {
-    left: initial;
-    right: -20mm;
-}
-.m1 {top: 80mm;}
-.m2 {top: 123.5mm;}
-.m3 {top: 185mm;}
-
 .page-break {
    break-before: page;
 }
@@ -23,15 +8,15 @@ hr.page-break {

@page {
    size: A4;
-    margin: 25mm 20mm 35mm 25mm;
+    margin: 25mm 20mm 25mm 25mm;
+}

-    @bottom-center {
-        content: element(page-footer);
-    }
+@page :first {
+    margin: 25mm 20mm 35mm 25mm;
 }

@media screen {
-    body, header, .footer-wrapper {
+    body, header {
        width: 210mm;
    }

@@ -39,10 +24,6 @@ hr.page-break {
        border: 1px solid lightgray;
    }

-    .m1, .m2, .m3 {
-        display: none;
-    }
-
    header {
        top: 0;
    }
@@ -54,23 +35,9 @@ hr.page-break {
    .main-wrapper {
        margin: 0 20mm 40mm 25mm;
    }
-
-    .footer-wrapper {
-        position: fixed;
-        bottom: 0;
-        left: 0;
-        right: 0;
-        background: white;
-    }
 }

-@media print {
-    .page::after {
-        content: "Seite " counter(page) " von " counter(pages) !important;
-    }
-
-    a {
-        text-decoration: inherit;
-        color: inherit;
-    }
+a {
+    text-decoration: inherit;
+    color: inherit;
 }
--- a/Elwig/Documents/Document.Table.css
+++ b/Elwig/Documents/Document.Table.css
@@ -1,13 +1,13 @@

 main table {
    border-collapse: collapse;
-    margin-bottom: 10mm;
+    margin-bottom: 0mm;
    font-size: 10pt;
 }
 main table.large {font-size: 12pt;}
 main table.tiny {
    font-size: 8pt;
-    margin-bottom: 5mm;
+    margin-bottom: 0mm;
 }

 main table.border {
@@ -30,7 +30,7 @@ main table.small th,
 main table.small td,
 main table.tiny th,
 main table.tiny td {
-    padding: 0.125mm 0.125mm;
+    padding: 0mm 0.125mm;
 }

 main table td[rowspan] {
--- a/Elwig/Documents/Document.cs
+++ b/Elwig/Documents/Document.cs
@@ -31,7 +31,6 @@ namespace Elwig.Documents {
        public string Title;
        public string Author;
        public string Header;
-        public string Footer;
        public DateOnly Date;

        public Document(string title) {
@@ -41,7 +40,6 @@ namespace Elwig.Documents {
            Title = title;
            Author = c.NameFull;
            Header = "";
-            Footer = Utils.GenerateFooter("<br/>", " \u00b7 ").Item(c.NameFull).ToString();
            Date = DateOnly.FromDateTime(Utils.Today);
        }

@@ -122,12 +120,12 @@ namespace Elwig.Documents {
                        var tmpHtml = new TempFile("html");
                        await File.WriteAllTextAsync(tmpHtml.FilePath, await doc.Render(), Utils.UTF8);
                        tmpHtmls.Add(tmpHtml);
-                        tmpFiles.Add((doc is Letterhead ? "#" : "") + tmpHtml.FileName);
+                        tmpFiles.Add((doc is Letterhead ? "#" : "") + tmpHtml.FilePath);
                        i++;
                        progress?.Report(GenerationProportion * 100 * i / n);
                    }
                    progress?.Report(GenerationProportion * 100);
-                    var pages = await Pdf.Convert(tmpFiles, pdf.FileName, IsDoublePaged, cancelToken, new Progress<double>(v => progress?.Report(GenerationProportion * 100 + v * (1 - GenerationProportion))));
+                    var pages = Pdf.Convert(tmpFiles, pdf.FilePath, IsDoublePaged, m.Documents, cancelToken, new Progress<double>(v => progress?.Report(GenerationProportion * 100 + v * (1 - GenerationProportion))));
                    TotalPages = pages.Pages;
                    _pdfFile = pdf;
                } catch {
@@ -146,7 +144,7 @@ namespace Elwig.Documents {
                    using var tmpHtml = new TempFile("html");
                    await File.WriteAllTextAsync(tmpHtml.FilePath, await Render(), Utils.UTF8);
                    progress?.Report(50.0);
-                    var pages = await Pdf.Convert(tmpHtml.FilePath, pdf.FilePath, IsDoublePaged, cancelToken);
+                    var pages = Pdf.Convert(tmpHtml.FilePath, pdf.FilePath, this);
                    TotalPages = pages.Pages;
                    _pdfFile = pdf;
                } catch {
--- a/Elwig/Documents/Document.cshtml
+++ b/Elwig/Documents/Document.cshtml
@@ -13,41 +13,12 @@
    @if (Model.IsDoublePaged) {
        <style>
            @@page :left {
-                margin: 25mm 25mm 35mm 20mm;
-                @@bottom-center {
-                    content: element(page-footer-left);
-                }
+                margin: 25mm 25mm 25mm 20mm;
            }
        </style>
    }
 </head>
 <body>
-    @if (Model.ShowFoldMarks) {
-        <div class="m1"></div>
-        <div class="m2"></div>
-        <div class="m3"></div>
-        <div class="m1 r"></div>
-        <div class="m2 r"></div>
-        <div class="m3 r"></div>
-    }
-    <div class="footer-wrapper">
-        <div class="pre-footer">
-            <span class="date">@($"{Model.Date:dddd, d. MMMM yyyy}")</span>
-            <span class="doc-id">@Model.DocumentId</span>
-            <span><span class="page"></span>@Raw(Model.IsPreview ? " <b>(vorläufig)</b>" : "")</span>
-        </div>
-        <footer>@Raw(Model.Footer)</footer>
-    </div>
-    @if (Model.IsDoublePaged) {
-        <div class="footer-wrapper left">
-            <div class="pre-footer">
-                <span>@Raw(Model.IsPreview ? "<b>(vorläufig)</b> " : "")<span class="page"></span></span>
-                <span class="doc-id">@Model.DocumentId</span>
-                <span class="date">@($"{Model.Date:dddd, d. MMMM yyyy}")</span>
-            </div>
-            <footer>@Raw(Model.Footer)</footer>
-        </div>
-    }
    <header>@Raw(Model.Header)</header>
    <div class="spacing"></div>
    <div class="main-wrapper">
--- a/Elwig/Documents/Document.css
+++ b/Elwig/Documents/Document.css
@@ -55,53 +55,6 @@ header .type {
    font-weight: normal;
 }

-.footer-wrapper {
-    position: running(page-footer);
-    width: 165mm;
-    /* for some reason the position without the following statement changes on the second page */
-    border: var(--border-thickness) solid #00000000;
-}
-
-.footer-wrapper.left {
-    position: running(page-footer-left);
-}
-
-.pre-footer {
-    margin: 1em 0;
-    font-size: 10pt;
-}
-
-.pre-footer > * {
-    display: inline-block;
-    width: 33%;
-}
-
-.pre-footer > *:first-child {
-    text-align: left;
-}
-
-.pre-footer > *:nth-child(2) {
-    text-align: center;
-    font-style: italic;
-}
-
-.pre-footer > *:last-child {
-    text-align: right;
-    float: right;
-}
-
-.pre-footer .page::after {
-    content: "Seite 1 von 1";
-}
-
-footer {
-    font-size: 10pt;
-    border-top: var(--border-thickness) solid black;
-    height: 25mm;
-    padding-top: 1mm;
-    text-align: center;
-}
-
 .hidden {
    visibility: hidden;
 }
--- a/Elwig/Documents/MemberDataSheet.cshtml
+++ b/Elwig/Documents/MemberDataSheet.cshtml
@@ -166,7 +166,6 @@
    }

    @if (areaComs.Count != 0) {
-        <br class="area-commitements"/>
        <h2>Flächenbindungen per @($"{Model.Date:dd.MM.yyyy}")</h2>
        <table class="area-commitements">
            <colgroup>
--- a/Elwig/Documents/MemberDataSheet.css
+++ b/Elwig/Documents/MemberDataSheet.css
@@ -1,5 +1,6 @@

 h2 {
+    margin-top: 0;
    margin-bottom: 0.5em !important;
 }

@@ -22,9 +23,3 @@ table.area-commitements td.text {
 table.area-commitements tr.sum {
    font-size: 12pt;
 }
-
-@page :not(:first) {
-    br.area-commitements {
-        display: none;
-    }
-}
--- a/Elwig/Elwig.csproj
+++ b/Elwig/Elwig.csproj
@@ -25,6 +25,9 @@
  <ItemGroup>
    <PackageReference Include="bblanchon.PDFium.Win32" Version="147.0.7690" />
    <PackageReference Include="CommunityToolkit.Mvvm" Version="8.4.0" />
+    <PackageReference Include="itext" Version="9.5.0" />
+    <PackageReference Include="itext.bouncy-castle-adapter" Version="9.5.0" />
+    <PackageReference Include="itext.pdfhtml" Version="6.3.1" />
    <PackageReference Include="LinqKit" Version="1.3.9" />
    <PackageReference Include="MailKit" Version="4.14.1" />
    <PackageReference Include="Microsoft.AspNetCore.Razor.Language" Version="6.0.36" />
--- a/Elwig/Helpers/Printing/FooterEventHandler.cs
+++ b/Elwig/Helpers/Printing/FooterEventHandler.cs
@@ -0,0 +1,176 @@
+using Elwig.Documents;
+using iText.IO.Font.Constants;
+using iText.Kernel.Font;
+using iText.Kernel.Geom;
+using iText.Kernel.Pdf;
+using iText.Kernel.Pdf.Action;
+using iText.Kernel.Pdf.Canvas;
+using iText.Kernel.Pdf.Event;
+using iText.Kernel.Pdf.Xobject;
+using iText.Layout;
+using iText.Layout.Borders;
+using iText.Layout.Element;
+using iText.Layout.Properties;
+using System;
+using System.Collections.Generic;
+
+namespace Elwig.Helpers.Printing {
+    public class FooterEventHandler : AbstractPdfDocumentEventHandler {
+
+        private const float _fontSize = 10;
+        private const float _ptInMm = 2.8346456693f;
+        private const float _placeholderWidth = 50 * _ptInMm;
+
+        private readonly string _date;
+        private readonly string? _center;
+        private readonly bool _doublePaged;
+        private readonly bool _isPreview;
+        private readonly bool _isBusiness;
+        private readonly bool _showFoldMarks;
+        private readonly PdfFont _font;
+        private readonly PdfFont _fontBold;
+        private readonly PdfFont _fontItalic;
+
+        private readonly List<PdfFormXObject> _pageNumPlaceholders;
+
+        public int NumberOfPages { get; private set; }
+
+        public FooterEventHandler(Documents.Document? doc = null) {
+            _date = $"{doc?.Date ?? DateOnly.FromDateTime(Utils.Today):dddd, d. MMMM yyyy}";
+            _center = doc?.DocumentId;
+            _doublePaged = doc?.IsDoublePaged ?? false;
+            _isPreview = doc?.IsPreview ?? false;
+            _isBusiness = doc is BusinessDocument;
+            _showFoldMarks = doc?.ShowFoldMarks ?? false;
+            _font = PdfFontFactory.CreateFont(StandardFonts.TIMES_ROMAN);
+            _fontBold = PdfFontFactory.CreateFont(StandardFonts.TIMES_BOLD);
+            _fontItalic = PdfFontFactory.CreateFont(StandardFonts.TIMES_ITALIC);
+            _pageNumPlaceholders = [];
+        }
+
+        protected override void OnAcceptedEvent(AbstractPdfDocumentEvent evt) {
+            if (evt.GetType() == PdfDocumentEvent.END_PAGE) {
+                OnPageEnd((PdfDocumentEvent)evt);
+            } else if (evt.GetType() == PdfDocumentEvent.START_DOCUMENT_CLOSING) {
+                OnDocumentClose((PdfDocumentEvent)evt);
+            }
+        }
+
+        private void OnPageEnd(PdfDocumentEvent evt) {
+            var pdf = evt.GetDocument();
+            var page = evt.GetPage();
+            var pageNum = pdf.GetPageNumber(page);
+
+            var pageSize = page.GetPageSize();
+            float leftX1 = pageSize.GetLeft() + 25 * _ptInMm;
+            float leftX2 = pageSize.GetLeft() + 20 * _ptInMm;
+            float rightX1 = pageSize.GetRight() - 20 * _ptInMm;
+            float rightX2 = pageSize.GetRight() - 25 * _ptInMm;
+            float footerY = pageSize.GetBottom() + 25 * _ptInMm;
+            float y = footerY + _fontSize;
+            float footerWidth = 165 * _ptInMm;
+            float footerHeight = 25 * _ptInMm;
+
+            var pdfCanvas = new PdfCanvas(page.NewContentStreamAfter(), page.GetResources(), pdf);
+            using var canvas = new Canvas(pdfCanvas, pageSize);
+
+            var placeholder = new PdfFormXObject(new Rectangle(0, 0, _placeholderWidth, _fontSize));
+            _pageNumPlaceholders.Add(placeholder);
+
+            var c = App.Client;
+            var dateP = new Paragraph(_date).SetFont(_font).SetFontSize(_fontSize);
+            var centerP = new Paragraph(_center ?? "").SetFont(_fontItalic).SetFontSize(_fontSize);
+            var pageNumP = new Paragraph().Add(new Image(placeholder)).SetFont(_font).SetFontSize(_fontSize);
+
+            if (pageNum == 1) {
+                // First page
+                canvas.ShowTextAligned(dateP, leftX1, y, TextAlignment.LEFT);
+                canvas.ShowTextAligned(centerP, (leftX1 + rightX1) / 2, y, TextAlignment.CENTER);
+                canvas.ShowTextAligned(pageNumP, rightX1, y, TextAlignment.RIGHT);
+
+                var footerP = new Paragraph().SetFont(_font).SetFontSize(_fontSize)
+                    .SetTextAlignment(TextAlignment.CENTER).SetVerticalAlignment(VerticalAlignment.TOP)
+                    .SetMargin(0).SetMultipliedLeading(1)
+                    .SetWidth(footerWidth).SetHeight(footerHeight).SetPaddingTop(1 * _ptInMm).SetBorderTop(new SolidBorder(0.5f))
+                    .Add(c.NameFull);
+                if (_isBusiness) {
+                    footerP.Add("\n");
+                    footerP.AddAll(Utils.GenerateFooter("\n", " \u00b7 ")
+                        .Item(c.Address).Item($"{c.Plz} {c.Ort}").Item("Österreich").Item("Tel.", c.PhoneNr).Item("Fax", c.FaxNr).NextLine()
+                        .Item(c.EmailAddress != null ? new Link(c.EmailAddress, PdfAction.CreateURI($"mailto:{Uri.EscapeDataString(c.Name)}%20<{c.EmailAddress}>")) : null)
+                            .Item(c.Website != null ? new Link(c.Website, PdfAction.CreateURI($"http://{c.Website}/")) : null)
+                            .Item("Betriebs-Nr.", c.LfbisNr).Item("Bio-KSt.", c.OrganicAuthority).NextLine()
+                        .Item("UID", c.UstIdNr).Item("BIC", c.Bic).Item("IBAN", c.Iban)
+                        .ToLeafElements());
+                }
+                // FIXME links are drawn on next page - move footer into "normal" document creation
+                canvas.ShowTextAligned(footerP, (leftX1 + rightX1) / 2, footerY, TextAlignment.CENTER, VerticalAlignment.TOP);
+            } else if (_doublePaged && (pageNum % 2 == 0)) {
+                // Swap side
+                canvas.ShowTextAligned(pageNumP, leftX2, footerY, TextAlignment.LEFT, VerticalAlignment.TOP);
+                canvas.ShowTextAligned(centerP, (leftX2 + rightX2) / 2, footerY, TextAlignment.CENTER, VerticalAlignment.TOP);
+                canvas.ShowTextAligned(dateP, rightX2, footerY, TextAlignment.RIGHT, VerticalAlignment.TOP);
+            } else {
+                canvas.ShowTextAligned(dateP, leftX1, footerY, TextAlignment.LEFT, VerticalAlignment.TOP);
+                canvas.ShowTextAligned(centerP, (leftX1 + rightX1) / 2, footerY, TextAlignment.CENTER, VerticalAlignment.TOP);
+                canvas.ShowTextAligned(pageNumP, rightX1, footerY, TextAlignment.RIGHT, VerticalAlignment.TOP);
+            }
+
+            if (_showFoldMarks) {
+                var m1 = pageSize.GetTop() - 105 * _ptInMm;
+                var m2 = pageSize.GetTop() - 148.5 * _ptInMm;
+                var m3 = pageSize.GetTop() - 210 * _ptInMm;
+                pdfCanvas.SetLineWidth(0.5f);
+
+                pdfCanvas.MoveTo(0, m1);
+                pdfCanvas.LineTo(10 * _ptInMm, m1);
+                pdfCanvas.MoveTo(pageSize.GetRight(), m1);
+                pdfCanvas.LineTo(pageSize.GetRight() - 10 * _ptInMm, m1);
+
+                pdfCanvas.MoveTo(0, m2);
+                pdfCanvas.LineTo(7 * _ptInMm, m2);
+                pdfCanvas.MoveTo(pageSize.GetRight(), m2);
+                pdfCanvas.LineTo(pageSize.GetRight() - 7 * _ptInMm, m2);
+
+                pdfCanvas.MoveTo(0, m3);
+                pdfCanvas.LineTo(10 * _ptInMm, m3);
+                pdfCanvas.MoveTo(pageSize.GetRight(), m3);
+                pdfCanvas.LineTo(pageSize.GetRight() - 10 * _ptInMm, m3);
+
+                pdfCanvas.ClosePathStroke();
+            }
+
+            if (NumberOfPages > 0) {
+                // FillPlaceholders() was already called
+                FillPlaceholder(pdf, pageNum);
+            }
+        }
+
+        private void OnDocumentClose(PdfDocumentEvent evt) {
+            FillPlaceholders(evt.GetDocument());
+        }
+
+        private void FillPlaceholders(PdfDocument pdf) {
+            NumberOfPages = pdf.GetNumberOfPages();
+            for (int i = 0; i < _pageNumPlaceholders.Count; i++)
+                FillPlaceholder(pdf, i + 1);
+        }
+
+        private void FillPlaceholder(PdfDocument pdf, int pageNum) {
+            var placeholder = _pageNumPlaceholders[pageNum - 1];
+            using var canvas = new Canvas(placeholder, pdf);
+            if (_doublePaged && (pageNum % 2 == 0)) {
+                // swap
+                var p = new Paragraph().SetFont(_font).SetFontSize(_fontSize);
+                if (_isPreview) p.Add(new Text("(vorläufig) ").SetFont(_fontBold));
+                p.Add($"Seite {pageNum:N0} von {NumberOfPages:N0} ");
+                canvas.ShowTextAligned(p, 0, 0, TextAlignment.LEFT);
+            } else {
+                var p = new Paragraph().SetFont(_font).SetFontSize(_fontSize)
+                    .Add($"Seite {pageNum:N0} von {NumberOfPages:N0}");
+                if (_isPreview) p.Add(new Text(" (vorläufig)").SetFont(_fontBold));
+                canvas.ShowTextAligned(p, _placeholderWidth, 0, TextAlignment.RIGHT);
+            }
+        }
+    }
+}
--- a/Elwig/Helpers/Printing/Pdf.cs
+++ b/Elwig/Helpers/Printing/Pdf.cs
@@ -1,103 +1,148 @@
 using Elwig.Windows;
+using iText.Html2pdf;
+using iText.Kernel.Pdf;
+using iText.Kernel.Pdf.Event;
+using iText.Kernel.Utils;
 using System;
 using System.Collections.Generic;
-using System.Diagnostics;
 using System.Drawing.Printing;
 using System.IO;
 using System.Linq;
-using System.Net.Sockets;
-using System.Reflection;
-using System.Text.RegularExpressions;
 using System.Threading;
 using System.Threading.Tasks;
 using System.Windows;

 namespace Elwig.Helpers.Printing {
    public static class Pdf {
-
-        private static readonly string WinziPrint = (Assembly.GetEntryAssembly()?.Location.Contains(@"\bin\") ?? false) ?
-            Path.Combine(Assembly.GetEntryAssembly()!.Location.Split(@"\bin\")[0], "../Installer/Files/WinziPrint.exe") :
-            new string[] { App.InstallPath }
-                .Union(Environment.GetEnvironmentVariable("PATH")?.Split(';') ?? [])
-                .Select(x => Path.Combine(x, "WinziPrint.exe"))
-                .Where(File.Exists)
-                .FirstOrDefault() ?? throw new FileNotFoundException("WiniPrint executable not found");
-        private static Process? WinziPrintProc;
-        public static bool IsReady => WinziPrintProc != null;
-
-        public static async Task Init(Action? evtHandler = null) {
+        public static Task Init(Action? evtHandler = null) {
            PdfiumNative.FPDF_InitLibrary();
-            // NOTE: If the WinziPrint daemon is already running this will succeed, but the process will fail.
-            //       Should be no problem, as long as the daemon is not closed
-            var p = new Process() { StartInfo = new() {
-                FileName = WinziPrint,
-                CreateNoWindow = true,
-                UseShellExecute = false,
-                RedirectStandardOutput = true,
-            } };
-            p.StartInfo.ArgumentList.Add("-D");
-            p.StartInfo.ArgumentList.Add("-d");
-            p.StartInfo.ArgumentList.Add(App.TempPath);
-            p.Start();
-            await p.StandardOutput.ReadLineAsync();
-            WinziPrintProc = p;
            evtHandler?.Invoke();
+            return Task.CompletedTask;
        }

        public static Task Cleanup() {
-            WinziPrintProc?.Kill(true);
-            WinziPrintProc?.Close();
            PdfiumNative.FPDF_DestroyLibrary();
            return Task.CompletedTask;
        }

-        public static async Task<(int Pages, IEnumerable<int> PerDoc)> Convert(string htmlPath, string pdfPath, bool doublePaged = false, CancellationToken? cancelToken = null, IProgress<double>? progress = null) {
-            return await Convert([htmlPath], pdfPath, doublePaged, cancelToken, progress);
+        public static (int Pages, IEnumerable<int> PerDoc) Convert(string htmlPath, string pdfPath, Documents.Document? doc = null) {
+            int nPages;
+            using var html = File.Open(htmlPath, FileMode.Open);
+            using var writer = new PdfWriter(pdfPath);
+            using var pdf = new PdfDocument(writer);
+            var footerHandler = new FooterEventHandler(doc);
+            pdf.AddEventHandler(PdfDocumentEvent.END_PAGE, footerHandler);
+            pdf.AddEventHandler(PdfDocumentEvent.START_DOCUMENT_CLOSING, footerHandler);
+            // TODO embed fonts?
+            //pdf.AddFont(PdfFontFactory.CreateFont(StandardFonts.TIMES_ROMAN));
+            HtmlConverter.ConvertToPdf(html, pdf);
+            nPages = footerHandler.NumberOfPages;
+            return (nPages, [nPages]);
        }

-        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) {
-            if (WinziPrintProc == null) throw new InvalidOperationException("The WinziPrint process has not been initialized yet");
-            progress?.Report(0.0);
-            using var client = new TcpClient("127.0.0.1", 30983);
-            using var stream = client.GetStream();
-            string cnxId;
-            using var reader = new StreamReader(stream);
-            var first = await reader.ReadLineAsync() ?? throw new IOException("Invalid response from WinziPrint");
-            if (first.StartsWith("id:")) {
-                cnxId = first[3..].Trim();
-            } else {
-                throw new IOException("Invalid response from WinziPrint");
-            }
-            await stream.WriteAsync(Utils.UTF8.GetBytes(
-                "-e utf-8;-p;" + (doublePaged ? "-2;" : "") +
-                $"{string.Join(';', htmlPath)};{pdfPath}" +
-                "\r\n"));
-            bool cancelled = false;
-            while (true) {
-                if (!cancelled && (cancelToken?.IsCancellationRequested ?? false)) {
-                    try {
-                        using var cancelClient = new TcpClient("127.0.0.1", 30983);
-                        using var cancelStream = cancelClient.GetStream();
-                        using var cancelReader = new StreamReader(cancelStream);
-                        await cancelReader.ReadLineAsync();
-                        await cancelStream.WriteAsync(Utils.UTF8.GetBytes($"cancel;{cnxId}\r\n"));
-                    } catch { }
-                    cancelled = true;
+        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) {
+            var tmpFileNames = new List<string>();
+            var pageNums = new List<int>();
+            var tmpPageNums = new List<int>();
+
+            var htmlFiles = inputFiles
+                .Where(f => !f.EndsWith(".pdf", StringComparison.OrdinalIgnoreCase))
+                .Select(f => f.TrimStart('!', '#'))
+                .ToList();
+
+            try {
+                for (int i = 0; i < htmlFiles.Count; i++) {
+                    string tmpFile = $"{pdfPath}.{i:0000}.part";
+                    tmpFileNames.Add(tmpFile);
+                    var (pages, _) = Convert(htmlFiles[i], tmpFile, docs?.ElementAt(i));
+                    tmpPageNums.Add(pages);
                }
-                var line = await reader.ReadLineAsync() ?? throw new IOException("Invalid response from WinziPrint");
-                if (line.StartsWith("error:")) {
-                    var msg = line[6..].Trim();
-                    if (msg == "aborted")
-                        throw new OperationCanceledException("Dokumentenerzeugung abgebrochen!");
-                    throw new IOException($"WinziPrint: {msg}");
-                } else if (line.StartsWith("progress:")) {
-                    var parts = line[9..].Trim().Split('/').Select(int.Parse).ToArray();
-                    progress?.Report(100.0 * parts[0] / parts[1]);
-                } else if (line.StartsWith("success:")) {
-                    var m = Regex.Match(line, @"([0-9]+) pages \(([0-9, ]+)\)");
-                    return (int.Parse(m.Groups[1].Value), m.Groups[2].Value.Split(", ").Select(int.Parse).ToList());
+
+                using var writer = new PdfWriter(pdfPath);
+                using var mergedPdf = new PdfDocument(writer);
+                var merger = new PdfMerger(mergedPdf);
+
+                PdfPage? letterheadPage = null;
+                int letterheadInsertIndex = 0;
+                int letterheadDocIndex = 0;
+
+                for (int i = 0; i < inputFiles.Count(); i++) {
+                    var fileName = inputFiles.ElementAt(i);
+                    int p0 = mergedPdf.GetNumberOfPages();
+
+                    if (letterheadPage != null && fileName.StartsWith('#')) {
+                        if (mergedPdf.GetNumberOfPages() <= letterheadInsertIndex) {
+                            mergedPdf.AddPage(letterheadPage.CopyTo(mergedPdf));
+                            mergedPdf.AddNewPage();
+                        } else {
+                            mergedPdf.AddPage(letterheadInsertIndex + 1, letterheadPage.CopyTo(mergedPdf));
+                            mergedPdf.AddNewPage(letterheadInsertIndex + 2);
+                        }
+
+                        pageNums[letterheadDocIndex] = 1;
+                        letterheadPage = null;
+                    }
+
+                    if (fileName.EndsWith(".pdf", StringComparison.OrdinalIgnoreCase)) {
+                        var cleanName = fileName.TrimStart('!', '#');
+
+                        if (doublePaged && fileName.StartsWith('#')) {
+                            using var reader = new PdfReader(cleanName);
+                            using var src = new PdfDocument(reader);
+                            letterheadPage = src.GetPage(1).CopyTo(mergedPdf);
+                            letterheadInsertIndex = p0;
+                            letterheadDocIndex = i;
+                        } else {
+                            using var reader = new PdfReader(cleanName);
+                            using var src = new PdfDocument(reader);
+                            merger.Merge(src, 1, src.GetNumberOfPages());
+                        }
+                    } else {
+                        string tmpFile = tmpFileNames[i];
+                        if (doublePaged && fileName.StartsWith('#')) {
+                            using var reader = new PdfReader(tmpFile);
+                            using var src = new PdfDocument(reader);
+                            letterheadPage = src.GetPage(1).CopyTo(mergedPdf);
+                            letterheadInsertIndex = p0;
+                            letterheadDocIndex = i;
+                        } else {
+                            using var reader = new PdfReader(tmpFile);
+                            using var src = new PdfDocument(reader);
+                            merger.Merge(src, 1, tmpPageNums[i]);
+                        }
+                    }
+
+                    int p1 = mergedPdf.GetNumberOfPages();
+                    pageNums.Add(p1 - p0);
+
+                    if (doublePaged && fileName[0] != '!' && fileName[0] != '#' && mergedPdf.GetNumberOfPages() % 2 != 0) {
+                        if (letterheadPage != null) {
+                            mergedPdf.AddPage(letterheadPage.CopyTo(mergedPdf));
+                            letterheadPage = null;
+                        } else {
+                            mergedPdf.AddNewPage();
+                        }
+                    }
+                }
+
+                if (letterheadPage != null) {
+                    if (mergedPdf.GetNumberOfPages() <= letterheadInsertIndex) {
+                        mergedPdf.AddPage(letterheadPage.CopyTo(mergedPdf));
+                        mergedPdf.AddNewPage();
+                    } else {
+                        mergedPdf.AddPage(letterheadInsertIndex + 1, letterheadPage.CopyTo(mergedPdf));
+                        mergedPdf.AddNewPage(letterheadInsertIndex + 2);
+                    }
+
+                    pageNums[letterheadDocIndex] = 1;
+                }
+            } finally {
+                foreach (var tmp in tmpFileNames) {
+                    if (File.Exists(tmp)) File.Delete(tmp);
                }
            }
+
+            return (pageNums.Sum(), pageNums);
        }

        public static void Show(TempFile file, string title) {
--- a/Elwig/Helpers/Utils.cs
+++ b/Elwig/Helpers/Utils.cs
@@ -3,6 +3,7 @@ using Elwig.Documents;
 using Elwig.Helpers.Billing;
 using Elwig.Models;
 using Elwig.Models.Entities;
+using iText.Layout.Element;
 using LinqKit;
 using MailKit.Net.Smtp;
 using MailKit.Security;
@@ -304,23 +305,18 @@ namespace Elwig.Helpers {
        }

        public class Footer {
-            private string Text = "";
+            private readonly List<List<object>> Items = [[]];
            private readonly string LineBreak;
-            private readonly string Seperator;
-            private bool FirstLine = true;
-            private bool FirstItemInLine = true;
+            private readonly string Separator;

-            public Footer(string lineBreak, string seperator) {
+            public Footer(string lineBreak, string separator) {
                LineBreak = lineBreak;
-                Seperator = seperator;
+                Separator = separator;
            }

-            public Footer Item(string? text) {
+            public Footer Item(object? text) {
                if (text == null) return this;
-                Text += FirstItemInLine ? (FirstLine ? "" : LineBreak) : Seperator;
-                Text += text;
-                FirstLine = false;
-                FirstItemInLine = false;
+                Items[^1].Add(text);
                return this;
            }

@@ -329,12 +325,28 @@ namespace Elwig.Helpers {
            }

            public Footer NextLine() {
-                FirstItemInLine = true;
+                Items.Add([]);
                return this;
            }

            public override string ToString() {
-                return Text;
+                return string.Join(LineBreak, Items.Select(l => string.Join(Separator, l.ToString())));
+            }
+
+            public IList<ILeafElement> ToLeafElements() {
+                var l = new List<ILeafElement>();
+                var first1 = true;
+                foreach (var line in Items) {
+                    if (!first1) l.Add(new Text(LineBreak));
+                    var first2 = true;
+                    foreach (var item in line) {
+                        if (!first2) l.Add(new Text(Separator));
+                        l.Add(item as ILeafElement ?? new Text(item.ToString()));
+                        first2 = false;
+                    }
+                    first1 = false;
+                }
+                return l;
            }
        }

--- a/Elwig/Windows/AboutWindow.xaml
+++ b/Elwig/Windows/AboutWindow.xaml
@@ -22,7 +22,7 @@
            Programmiersprache: C#<LineBreak/>
            Framework: Windows Presentation Framework (WPF)<LineBreak/>
            Datenbank: <Hyperlink NavigateUri="https://sqlite.org/" RequestNavigate="Hyperlink_RequestNavigate">SQLite</Hyperlink><LineBreak/>
-            PDF-Erstellung: <Hyperlink NavigateUri="https://weasyprint.org/" RequestNavigate="Hyperlink_RequestNavigate">WeasyPrint</Hyperlink>, <Hyperlink NavigateUri="https://github.com/toddams/RazorLight" RequestNavigate="Hyperlink_RequestNavigate">RazorLight</Hyperlink>, <Hyperlink NavigateUri="https://github.com/bblanchon/pdfium-binaries" RequestNavigate="Hyperlink_RequestNavigate">Pdfium</Hyperlink><LineBreak/>
+            PDF-Erstellung: <Hyperlink NavigateUri="https://itextpdf.com/" RequestNavigate="Hyperlink_RequestNavigate">iText</Hyperlink>, <Hyperlink NavigateUri="https://github.com/toddams/RazorLight" RequestNavigate="Hyperlink_RequestNavigate">RazorLight</Hyperlink>, <Hyperlink NavigateUri="https://github.com/bblanchon/pdfium-binaries" RequestNavigate="Hyperlink_RequestNavigate">Pdfium</Hyperlink><LineBreak/>
            Paketierung: <Hyperlink NavigateUri="https://www.firegiant.com/wixtoolset/" RequestNavigate="Hyperlink_RequestNavigate">WiX Toolset</Hyperlink>
        </TextBlock>

--- a/Installer/Files/WinziPrint.exe
+++ b/Installer/Files/WinziPrint.exe
--- a/Installer/Installer.wixproj
+++ b/Installer/Installer.wixproj
@@ -35,6 +35,5 @@
  </Target>
  <ItemGroup>
    <None Include="Files\config.ini" />
-    <None Include="Files\WinziPrint.exe" />
  </ItemGroup>
 </Project>
--- a/Installer/MainComponents.wxs
+++ b/Installer/MainComponents.wxs
@@ -7,9 +7,6 @@
      <Component Directory="ConfigFolder" Permanent="true" NeverOverwrite="true">
        <File Source="$(ProjectDir)\Files\config.ini" Id="config.ini"/>
      </Component>
-      <Component Directory="InstallFolder">
-        <File Source="$(ProjectDir)\Files\WinziPrint.exe" Id="WinziPrint.exe"/>
-      </Component>
    </ComponentGroup>
  </Fragment>
 </Wix>
--- a/README.md
+++ b/README.md
@@ -43,5 +43,5 @@ Packaging: [WiX Toolset](https://www.firegiant.com/wixtoolset/)
 Programmiersprache: C#  
 Framework: Windows Presentation Framework (WPF)  
 Datenbank: [SQLite](https://sqlite.org/)  
-PDF-Erstellung: [WeasyPrint](https://weasyprint.org/), [RazorLight](https://github.com/toddams/RazorLight), [Pdfium](https://github.com/bblanchon/pdfium-binaries)  
+PDF-Erstellung: [iText](https://itextpdf.com/), [RazorLight](https://github.com/toddams/RazorLight), [Pdfium](https://github.com/bblanchon/pdfium-binaries)  
 Paketierung: [WiX Toolset](https://www.firegiant.com/wixtoolset/)