From 6d891ff416fc88e57a0c5d1a49955bbf27d1c686 Mon Sep 17 00:00:00 2001
From: goat <16760685+goaaats@users.noreply.github.com>
Date: Sat, 17 Apr 2021 03:26:51 +0200
Subject: [PATCH] feat: show error message if font doesn't exist

---
 Dalamud/Interface/InterfaceManager.cs | 16 ++++++++++++++++
 Dalamud/Util.cs                       | 10 ++++++++++
 2 files changed, 26 insertions(+)

diff --git a/Dalamud/Interface/InterfaceManager.cs b/Dalamud/Interface/InterfaceManager.cs
index fe59f0708..b987855de 100644
--- a/Dalamud/Interface/InterfaceManager.cs
+++ b/Dalamud/Interface/InterfaceManager.cs
@@ -308,6 +308,13 @@ namespace Dalamud.Interface
         public static ImFontPtr DefaultFont { get; private set; }
         public static ImFontPtr IconFont { get; private set; }
 
+        private static void ShowFontError(string path)
+        {
+            Util.Fatal(
+                $"One or more files required by XIVLauncher were not found.\nPlease restart and report this error if it occurs again.\n\n{path}",
+                "Error");
+        }
+
         private unsafe void SetupFonts()
         {
             this.fontBuildSignal.Reset();
@@ -320,12 +327,18 @@ namespace Dalamud.Interface
 
             var fontPathJp = Path.Combine(this.dalamud.AssetDirectory.FullName, "UIRes", "NotoSansCJKjp-Medium.otf");
 
+            if (!File.Exists(fontPathJp))
+                ShowFontError(fontPathJp);
+
             var japaneseRangeHandle = GCHandle.Alloc(GlyphRangesJapanese.GlyphRanges, GCHandleType.Pinned);
 
             DefaultFont = ImGui.GetIO().Fonts.AddFontFromFileTTF(fontPathJp, 17.0f, null, japaneseRangeHandle.AddrOfPinnedObject());
 
             var fontPathGame = Path.Combine(this.dalamud.AssetDirectory.FullName, "UIRes", "gamesym.ttf");
 
+            if (!File.Exists(fontPathGame))
+                ShowFontError(fontPathGame);
+
             var gameRangeHandle = GCHandle.Alloc(new ushort[]
             {
                 0xE020,
@@ -337,6 +350,9 @@ namespace Dalamud.Interface
 
             var fontPathIcon = Path.Combine(this.dalamud.AssetDirectory.FullName, "UIRes", "FontAwesome5FreeSolid.otf");
 
+            if (!File.Exists(fontPathIcon))
+                ShowFontError(fontPathIcon);
+
             var iconRangeHandle = GCHandle.Alloc(new ushort[]
             {
                 0xE000,
diff --git a/Dalamud/Util.cs b/Dalamud/Util.cs
index e83458e83..5afec37c2 100644
--- a/Dalamud/Util.cs
+++ b/Dalamud/Util.cs
@@ -1,4 +1,5 @@
 using System;
+using System.Diagnostics;
 using System.Linq;
 using System.Reflection;
 using System.Runtime.InteropServices;
@@ -146,5 +147,14 @@ namespace Dalamud
                 ImGui.TextColored(ImGuiColors.HealerGreen, $"    {fieldInfo.Name}: {fieldInfo.GetValue(obj)}");
             }
         }
+
+        [DllImport("user32.dll", SetLastError = true, CharSet= CharSet.Auto)]
+        public static extern int MessageBox(IntPtr hWnd, string text, string caption, uint type);
+
+        public static void Fatal(string message, string caption)
+        {
+            MessageBox(Process.GetCurrentProcess().MainWindowHandle, message, caption, 0);
+            Environment.Exit(-1);
+        }
     }
 }