Rename solution directory to Elwig

Elwig/Documents/Pdf.cs

@@ -0,0 +1,87 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.IO;
+using System.Linq;
+using System.Reflection.Metadata.Ecma335;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Shapes;
+using PdfSharp.Pdf.IO;
+using PuppeteerSharp;
+using PuppeteerSharp.Media;
+using RazorLight;
+using Elwig.Helpers;
+using Elwig.Windows;
+
+namespace Elwig.Documents {
+    public static class Pdf {
+
+        private static readonly string CHROMIUM = @"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe";
+        private static IBrowser? Browser = null;
+        public static bool IsReady => Browser != null;
+
+        public static async Task Init(Action evtHandler) {
+            Browser = await Puppeteer.LaunchAsync(new LaunchOptions {
+                Headless = true,
+                ExecutablePath = CHROMIUM,
+            });
+            evtHandler();
+        }
+
+        public static async Task Close() {
+            if (Browser == null) return;
+            await Browser.CloseAsync();
+            Browser = null;
+        }
+
+        public static async Task Convert(string htmlPath, string pdfPath) {
+            if (Browser == null) throw new InvalidOperationException("The puppeteer engine has not been initialized yet");
+            using var page = await Browser.NewPageAsync();
+            page.Console += OnConsole;
+            await page.GoToAsync($"file://{htmlPath}");
+            await page.EvaluateFunctionAsync("async () => { await window.PagedPolyfill.preview(); }");
+            await page.PdfAsync(pdfPath, new() {
+                PreferCSSPageSize = true,
+                //Format = PaperFormat.A4,
+                DisplayHeaderFooter = false,
+                MarginOptions = new() {
+                    Top = "0mm",
+                    Right = "0mm",
+                    Bottom = "0mm",
+                    Left = "0mm",
+                },
+            });
+        }
+
+        private static void OnConsole(object sender, ConsoleEventArgs e) {
+            MessageBox.Show(e.Message.Text);
+        }
+
+        public static void UpdateMetadata(string path, string title, string author) {
+            using var doc = PdfReader.Open(path);
+            doc.Info.Title = title;
+            doc.Info.Author = author;
+            doc.Save(path);
+        }
+
+        public static void Show(TempFile file, string title) {
+            App.MainDispatcher.BeginInvoke(() => {
+                var w = new DocumentViewerWindow(title, file);
+                w.Show();
+            });
+        }
+
+        public static void Show(string path, string title) {
+            App.MainDispatcher.BeginInvoke(() => {
+                var w = new DocumentViewerWindow(title, path);
+                w.Show();
+            });
+        }
+
+        public static void Print(string path) {
+            // TODO print pdf
+        }
+    }
+}