81 lines
2.7 KiB
C#
81 lines
2.7 KiB
C#
using System;
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using System.Threading.Tasks;
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using System.Windows;
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using PdfSharp.Pdf.IO;
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using PuppeteerSharp;
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using Elwig.Helpers;
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using Elwig.Windows;
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namespace Elwig.Documents {
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public static class Pdf {
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private static readonly string Chromium = @"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe";
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private static IBrowser? Browser = null;
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public static bool IsReady => Browser != null;
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public static async Task Init(Action evtHandler) {
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Browser = await Puppeteer.LaunchAsync(new LaunchOptions {
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Headless = true,
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ExecutablePath = Chromium,
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// paged.js uses XHRs to load styles, so this is needed
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Args = new[] { "--allow-file-access-from-files" },
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});
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evtHandler();
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}
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public static async Task Close() {
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if (Browser == null) return;
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await Browser.CloseAsync();
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Browser = null;
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}
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public static async Task Convert(string htmlPath, string pdfPath) {
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if (Browser == null) throw new InvalidOperationException("The puppeteer engine has not been initialized yet");
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using var page = await Browser.NewPageAsync();
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page.Console += OnConsole;
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await page.GoToAsync($"file://{htmlPath}");
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await page.EvaluateFunctionAsync("async () => { await window.PagedPolyfill.preview(); }");
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await page.PdfAsync(pdfPath, new() {
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PreferCSSPageSize = true,
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//Format = PaperFormat.A4,
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DisplayHeaderFooter = false,
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MarginOptions = new() {
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Top = "0mm",
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Right = "0mm",
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Bottom = "0mm",
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Left = "0mm",
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},
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});
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}
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private static void OnConsole(object sender, ConsoleEventArgs e) {
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MessageBox.Show(e.Message.Text);
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}
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public static void UpdateMetadata(string path, string title, string author) {
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using var doc = PdfReader.Open(path);
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doc.Info.Title = title;
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doc.Info.Author = author;
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doc.Save(path);
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}
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public static void Show(TempFile file, string title) {
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App.MainDispatcher.BeginInvoke(() => {
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var w = new DocumentViewerWindow(title, file);
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w.Show();
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});
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}
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public static void Show(string path, string title) {
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App.MainDispatcher.BeginInvoke(() => {
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var w = new DocumentViewerWindow(title, path);
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w.Show();
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});
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}
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public static void Print(string path) {
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// TODO print pdf
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}
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}
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}
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