[ElmSharp] Cannnot load custom font files in app

[shyunMin]

Custom font files included in the app are not loaded when the app first runs.

I tried to use an custom font file using an app with font as a embedded resource.
However, custom font was not applied during the app running. it is applied after I terminated and re-launched the app.

This issue seems to occur since 5.5 wearable and TV, it didn't occur on 4.0.

The behavior of the app I tested is as below.

1. creates a font folder at launch time.
2. calls AppendGlobalFontPath() to add created folder.
3. copies the custom font file into the folder.
4. create Label using the custom font

Launched	Re-launched

It seems that the font file copied after calling AppendGlobalFontPath() is not loaded.

I attached test code and font file.

• font file - https://github.com/xamarin/Xamarin.Forms/blob/master/Xamarin.Forms.Controls/Fonts/CuteFont-Regular.ttf

using ElmSharp;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Reflection;
using Tizen.Applications;

namespace ElmSharpTemplate2
{
    class App : CoreUIApplication
    {
        protected override void OnCreate()
        {
            base.OnCreate();
            LoadFont();
            Initialize();
        }

        void LoadFont()
        {
            var dataPath = DirectoryInfo.Data;
            var resourcePath = DirectoryInfo.Resource;

            var fontDir = Directory.CreateDirectory(Path.Combine(dataPath, "fonts"));
            Utility.AppendGlobalFontPath(fontDir.FullName);
            Console.WriteLine($"### AppendGlobalFontPath path={fontDir.FullName}");

            var fontName = "CuteFont-Regular.ttf";
            var fileStream = GetEmbeddedResourceStream(GetType().GetTypeInfo().Assembly, fontName);

            var filePath = Path.Combine(fontDir.FullName, fontName);

            if (File.Exists(filePath))
            {
                Console.WriteLine($"### Font file({fontName}) already exists");
                return;
            }

            try
            {
                using (var stream = File.Create(filePath))
                {
                    fileStream.CopyTo(stream);
                }
                Console.WriteLine($"### [LoadFont] copied filePath={filePath} / File.Exists(filePath)={File.Exists(filePath)}");
            }
            catch (Exception ex)
            {
                File.Delete(filePath);
            }
        }

        void Initialize()
        {
            Window window = new Window("ElmSharpApp")
            {
                AvailableRotations = DisplayRotation.Degree_0 | DisplayRotation.Degree_180 | DisplayRotation.Degree_270 | DisplayRotation.Degree_90
            };
            window.BackButtonPressed += (s, e) =>
            {
                Exit();
            };
            window.Show();

            var box = new Box(window)
            {
                AlignmentX = -1,
                AlignmentY = -1,
                WeightX = 1,
                WeightY = 1,
            };
            box.Show();

            var bg = new Background(window)
            {
                Color = Color.Black
            };
            bg.SetContent(box);

            var conformant = new Conformant(window);
            conformant.Show();
            conformant.SetContent(bg);

            var labels = new List<Label>();

            for (var i = 0; i < 5; i++)
            {
                var label = new Label(window)
                {
                    AlignmentX = -1,
                    AlignmentY = -1,
                    WeightX = 1,
                    WeightY = 1,
                    Text = "<span align=center> Font Test < /span>",
                };
                label.Show();
                box.PackEnd(label);
                labels.Add(label);
            }

            labels[2].Text = "<span align=center font='CuteFont'> CuteFont < /span>";
        }

        Stream GetEmbeddedResourceStream(Assembly assembly, string resourceFileName)
        {
            var resourceNames = assembly.GetManifestResourceNames();

            var resourcePaths = resourceNames
                .Where(x => x.EndsWith(resourceFileName, StringComparison.CurrentCultureIgnoreCase))
                .ToArray();

            if (!resourcePaths.Any())
            {
                throw new Exception(string.Format("Resource ending with {0} not found.", resourceFileName));
            }
            if (resourcePaths.Length > 1)
            {
                resourcePaths = resourcePaths.Where(x => IsFile(x, resourceFileName)).ToArray();
            }

            return assembly.GetManifestResourceStream(resourcePaths.FirstOrDefault());
        }
        bool IsFile(string path, string file)
        {
            if (!path.EndsWith(file, StringComparison.Ordinal))
                return false;
            return path.Replace(file, "").EndsWith(".", StringComparison.Ordinal);
        }


        static void Main(string[] args)
        {
            Elementary.Initialize();
            Elementary.ThemeOverlay();
            App app = new App();
            app.Run(args);
        }
    }
}

[arosis78]

Please call evas_font_reinit() when custom font is added in path directory.