feat: 初始功能

2026-05-23 18:16:50 +08:00
parent a5bfd8792e
commit 9a51259e9e
63 changed files with 5377 additions and 1 deletions
--- a/Services/Printing/ImagePrintJobExecutor.cs
+++ b/Services/Printing/ImagePrintJobExecutor.cs
@@ -0,0 +1,88 @@
+using CloudPrint.Client.Models;
+using System.Drawing;
+using System.Drawing.Printing;
+using System.IO;
+
+namespace CloudPrint.Client.Services.Printing;
+
+public sealed class ImagePrintJobExecutor : IPrintJobExecutor
+{
+    private readonly IWindowsPrintQueueService _queueService;
+
+    private static readonly HashSet<string> SupportedExtensions = new(StringComparer.OrdinalIgnoreCase)
+    {
+        ".jpg", ".jpeg", ".png", ".bmp", ".gif"
+    };
+
+    public ImagePrintJobExecutor(IWindowsPrintQueueService queueService)
+    {
+        _queueService = queueService;
+    }
+
+    public bool CanHandle(PrintJob job)
+    {
+        return SupportedExtensions.Contains(Path.GetExtension(job.FilePath));
+    }
+
+    public Task ExecuteAsync(PrintJob job, IProgress<int>? progress, CancellationToken cancellationToken = default)
+    {
+        PrintFileGuards.EnsurePrintableFile(job);
+
+        return Task.Run(() =>
+        {
+            cancellationToken.ThrowIfCancellationRequested();
+            using var image = Image.FromFile(job.FilePath);
+            using var document = new PrintDocument
+            {
+                DocumentName = string.IsNullOrWhiteSpace(job.FileName) ? job.JobNo : job.FileName,
+                PrinterSettings =
+                {
+                    PrinterName = job.PrinterName,
+                    Copies = (short)Math.Clamp(job.Copies, 1, short.MaxValue)
+                }
+            };
+
+            if (document.PrinterSettings.CanDuplex)
+            {
+                document.PrinterSettings.Duplex = job.Duplex ? Duplex.Vertical : Duplex.Simplex;
+            }
+
+            document.DefaultPageSettings.Color = job.Color;
+            document.PrintPage += (_, args) => DrawImageToPage(image, args);
+            progress?.Report(20);
+            document.Print();
+            CaptureWindowsJob(job, document.DocumentName);
+            progress?.Report(100);
+        }, cancellationToken);
+    }
+
+    private void CaptureWindowsJob(PrintJob job, string documentName)
+    {
+        var queueJob = _queueService.FindLatestJob(job.PrinterName, documentName);
+        if (queueJob is null)
+        {
+            return;
+        }
+
+        job.WindowsJobId = queueJob.JobId;
+        job.WindowsJobStatus = queueJob.Status;
+    }
+
+    private static void DrawImageToPage(Image image, PrintPageEventArgs args)
+    {
+        if (args.Graphics is null)
+        {
+            throw new InvalidOperationException("打印图形上下文不可用");
+        }
+
+        var bounds = args.MarginBounds;
+        var ratio = Math.Min(bounds.Width / (double)image.Width, bounds.Height / (double)image.Height);
+        var width = (int)(image.Width * ratio);
+        var height = (int)(image.Height * ratio);
+        var x = bounds.Left + (bounds.Width - width) / 2;
+        var y = bounds.Top + (bounds.Height - height) / 2;
+
+        args.Graphics.DrawImage(image, x, y, width, height);
+        args.HasMorePages = false;
+    }
+}