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[#50] MailWindow: Add button to cancel document generation
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This commit is contained in:
Lorenz Stechauner
2026-01-16 00:22:11 +01:00
parent 01739ba42e
commit a90be2644d
5 changed files with 110 additions and 37 deletions
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46
Elwig/Helpers/Printing/Pdf.cs
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@@ -1,15 +1,16 @@
using System.Threading.Tasks;
using Elwig.Windows;
using System.Diagnostics;
using PdfiumViewer;
using System;
using System.IO;
using System.Collections.Generic;
using System.Windows;
using System.Text.RegularExpressions;
using System.Diagnostics;
using System.Drawing.Printing;
using System.IO;
using System.Linq;
using System.Net.Sockets;
using PdfiumViewer;
using System.Drawing.Printing;
using System.Text.RegularExpressions;
using System.Threading;
using System.Threading.Tasks;
using System.Windows;
namespace Elwig.Helpers.Printing {
public static class Pdf {
@@ -46,24 +47,45 @@ namespace Elwig.Helpers.Printing {
return Task.CompletedTask;
}
public static async Task<(int Pages, IEnumerable<int> PerDoc)> Convert(string htmlPath, string pdfPath, bool doublePaged = false, IProgress<double>? progress = null) {
return await Convert([htmlPath], pdfPath, doublePaged, progress);
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 async Task<(int Pages, IEnumerable<int> PerDoc)> Convert(IEnumerable<string> htmlPath, string pdfPath, bool doublePaged = false, IProgress<double>? progress = null) {
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;" : "") +
$"{string.Join(';', htmlPath)};{pdfPath}" +
"\r\n"));
using var reader = new StreamReader(stream);
bool cancelled = false;
while (true) {
if (!cancelled && (cancelToken?.IsCancellationRequested ?? false)) {
try {
using var cancelClient = new TcpClient("127.0.0.1", 30983);
using var cancelStream = cancelClient.GetStream();
using var cancelReader = new StreamReader(cancelStream);
await cancelReader.ReadLineAsync();
await cancelStream.WriteAsync(Utils.UTF8.GetBytes($"cancel;{cnxId}\r\n"));
} catch { }
cancelled = true;
}
var line = await reader.ReadLineAsync() ?? throw new IOException("Invalid response from WinziPrint");
if (line.StartsWith("error:")) {
throw new IOException($"WinziPrint: {line[6..].Trim()}");
var msg = line[6..].Trim();
if (msg == "aborted")
throw new OperationCanceledException("Dokumentenerzeugung abgebrochen!");
throw new IOException($"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]);