Migrate mail printing to WinUI print preview

2026-04-11 15:07:22 +02:00
parent 24626d1c31
commit e206368801
12 changed files with 565 additions and 828 deletions
@@ -1,74 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Runtime.InteropServices;
-
-namespace Wino.Mail.WinUI.Helpers;
-
-internal static partial class InstalledPrinterHelper
-{
-    private const int PrinterEnumLocal = 0x00000002;
-    private const int PrinterEnumConnections = 0x00000004;
-
-    public static IReadOnlyList<string> GetInstalledPrinters()
-    {
-        var flags = PrinterEnumLocal | PrinterEnumConnections;
-
-        if (!EnumPrinters(flags, null, 4, IntPtr.Zero, 0, out var bytesNeeded, out _))
-        {
-            var error = Marshal.GetLastWin32Error();
-            if (error != 122 || bytesNeeded <= 0)
-            {
-                throw new InvalidOperationException($"EnumPrinters failed to query buffer size. Win32 error: {error}.");
-            }
-        }
-
-        var printerBuffer = Marshal.AllocHGlobal(bytesNeeded);
-        try
-        {
-            if (!EnumPrinters(flags, null, 4, printerBuffer, bytesNeeded, out _, out var printerCount))
-            {
-                throw new InvalidOperationException($"EnumPrinters failed to enumerate printers. Win32 error: {Marshal.GetLastWin32Error()}.");
-            }
-
-            var printers = new List<string>(printerCount);
-            var structSize = Marshal.SizeOf<PrinterInfo4>();
-
-            for (var i = 0; i < printerCount; i++)
-            {
-                var current = IntPtr.Add(printerBuffer, i * structSize);
-                var info = Marshal.PtrToStructure<PrinterInfo4>(current);
-                if (!string.IsNullOrWhiteSpace(info.PrinterName))
-                {
-                    printers.Add(info.PrinterName);
-                }
-            }
-
-            return printers;
-        }
-        finally
-        {
-            Marshal.FreeHGlobal(printerBuffer);
-        }
-    }
-
-    [LibraryImport("winspool.drv", EntryPoint = "EnumPrintersW", SetLastError = true, StringMarshalling = StringMarshalling.Utf16)]
-    [return: MarshalAs(UnmanagedType.Bool)]
-    private static partial bool EnumPrinters(
-        int flags,
-        string? name,
-        int level,
-        IntPtr pPrinterEnum,
-        int cbBuf,
-        out int pcbNeeded,
-        out int pcReturned);
-
-    [StructLayout(LayoutKind.Sequential)]
-    private struct PrinterInfo4
-    {
-        public nint PrinterNamePointer;
-        public nint ServerNamePointer;
-        public int Attributes;
-
-        public string? PrinterName => Marshal.PtrToStringUni(PrinterNamePointer);
-    }
-}