/// <summary>
/// Searches for font assets at a given location and only accepts assets that fit to a given filename expression.
/// <para>File names can target multiple files with * wildcard. For example "FontFile*.ttf"</para>
/// </summary>
/// <param name="fontFamilyKey"></param>
/// <returns></returns>
private static IEnumerable <Uri> GetFontAssetsByExpression(FontFamilyKey fontFamilyKey)
{
var assetLoader = AvaloniaLocator.Current.GetService <IAssetLoader>();
var fileName = GetFileName(fontFamilyKey, out var fileExtension, out var location);
var availableResources = assetLoader.GetAssets(location, fontFamilyKey.BaseUri);
string compareTo;
if (fontFamilyKey.Source.IsAbsoluteUri)
{
if (fontFamilyKey.Source.Scheme == "resm")
{
compareTo = location.AbsolutePath + "." + fileName.Split('*').First();
}
else
{
compareTo = location.AbsolutePath + fileName.Split('*').First();
}
}
else
{
compareTo = location.AbsolutePath + fileName.Split('*').First();
}
var matchingResources = availableResources.Where(
x => x.AbsolutePath.Contains(compareTo) &&
x.AbsolutePath.EndsWith(fileExtension));
return(matchingResources);
}
private static string GetFileName(FontFamilyKey fontFamilyKey, out string fileExtension, out Uri location)
{
if (fontFamilyKey.Source.IsAbsoluteUri && fontFamilyKey.Source.Scheme == "resm")
{
fileExtension = "." + fontFamilyKey.Source.AbsolutePath.Split('.').LastOrDefault();
var fileName = fontFamilyKey.Source.LocalPath.Replace(fileExtension, string.Empty).Split('.').LastOrDefault();
location = new Uri(fontFamilyKey.Source.AbsoluteUri.Replace("." + fileName + fileExtension, string.Empty), UriKind.RelativeOrAbsolute);
return(fileName);
}
var pathSegments = fontFamilyKey.Source.OriginalString.Split('/');
var fileNameWithExtension = pathSegments.Last();
var fileNameSegments = fileNameWithExtension.Split('.');
fileExtension = "." + fileNameSegments.Last();
if (fontFamilyKey.BaseUri != null)
{
var relativePath = fontFamilyKey.Source.OriginalString
.Replace(fileNameWithExtension, string.Empty);
location = new Uri(fontFamilyKey.BaseUri, relativePath);
}
else
{
location = new Uri(fontFamilyKey.Source.AbsolutePath.Replace(fileNameWithExtension, string.Empty));
}
return(fileNameSegments.First());
}
/// <summary>
/// Searches for font assets at a given location and returns a quantity of found assets
/// </summary>
/// <param name="fontFamilyKey"></param>
/// <returns></returns>
private static IEnumerable <Uri> GetFontAssetsBySource(FontFamilyKey fontFamilyKey)
{
var assetLoader = AvaloniaLocator.Current.GetRequiredService <IAssetLoader>();
var availableAssets = assetLoader.GetAssets(fontFamilyKey.Source, fontFamilyKey.BaseUri);
return(availableAssets.Where(x => IsFontTtfOrOtf(x)));
}
private static (string fileNameWithoutExtension, string extension) GetFileName(
FontFamilyKey fontFamilyKey, out Uri location)
{
if (fontFamilyKey.Source.IsAbsoluteResm())
{
var fileName = GetFileNameAndExtension(fontFamilyKey.Source.GetUnescapeAbsolutePath(), '.');
var uriLocation = fontFamilyKey.Source.GetUnescapeAbsoluteUri()
.Replace("." + fileName.fileNameWithoutExtension + fileName.extension, string.Empty);
location = new Uri(uriLocation, UriKind.RelativeOrAbsolute);
return(fileName);
}
var filename = GetFileNameAndExtension(fontFamilyKey.Source.OriginalString);
var fullFilename = filename.fileNameWithoutExtension + filename.extension;
if (fontFamilyKey.BaseUri != null)
{
var relativePath = fontFamilyKey.Source.OriginalString
.Replace(fullFilename, string.Empty);
location = new Uri(fontFamilyKey.BaseUri, relativePath);
}
else
{
var uriString = fontFamilyKey.Source
.GetUnescapeAbsoluteUri()
.Replace(fullFilename, string.Empty);
location = new Uri(uriString);
}
return(filename);
}
/// <summary>
/// Searches for font assets at a given location and returns a quantity of found assets
/// </summary>
/// <param name="fontFamilyKey"></param>
/// <returns></returns>
private static IEnumerable <Uri> GetFontAssetsBySource(FontFamilyKey fontFamilyKey)
{
var availableAssets = s_assetLoader.GetAssets(fontFamilyKey.Source, fontFamilyKey.BaseUri);
var matchingAssets =
availableAssets.Where(x => x.AbsolutePath.EndsWith(".ttf") || x.AbsolutePath.EndsWith(".otf"));
return(matchingAssets);
}
private static string CreateFilePattern(
FontFamilyKey fontFamilyKey, Uri location, string fileNameWithoutExtension)
{
var path = location.GetUnescapeAbsolutePath();
var file = GetSubString(fileNameWithoutExtension, '*');
return(fontFamilyKey.Source.IsAbsoluteResm()
? path + "." + file
: path + file);
}
/// <summary>
/// Searches for font assets at a given location and only accepts assets that fit to a given filename expression.
/// <para>File names can target multiple files with * wildcard. For example "FontFile*.ttf"</para>
/// </summary>
/// <param name="fontFamilyKey"></param>
/// <returns></returns>
private static IEnumerable <Uri> GetFontAssetsByExpression(FontFamilyKey fontFamilyKey)
{
var(fileNameWithoutExtension, extension) = GetFileName(fontFamilyKey, out var location);
var filePattern = CreateFilePattern(fontFamilyKey, location, fileNameWithoutExtension);
var assetLoader = AvaloniaLocator.Current.GetRequiredService <IAssetLoader>();
var availableResources = assetLoader.GetAssets(location, fontFamilyKey.BaseUri);
return(availableResources.Where(x => IsContainsFile(x, filePattern, extension)));
}
/// <summary>
/// Searches for font assets at a given location and returns a quantity of found assets
/// </summary>
/// <param name="fontFamilyKey"></param>
/// <returns></returns>
private static IEnumerable <Uri> GetFontAssetsBySource(FontFamilyKey fontFamilyKey)
{
var assetLoader = AvaloniaLocator.Current.GetRequiredService <IAssetLoader>();
var availableAssets = assetLoader.GetAssets(fontFamilyKey.Source, fontFamilyKey.BaseUri);
var matchingAssets =
availableAssets.Where(x => x.AbsolutePath.EndsWith(".ttf") || x.AbsolutePath.EndsWith(".otf"));
return(matchingAssets);
}
/// <summary>
/// Loads all font assets that belong to the specified <see cref="FontFamilyKey"/>
/// </summary>
/// <param name="fontFamilyKey"></param>
/// <returns></returns>
public static IEnumerable <Uri> LoadFontAssets(FontFamilyKey fontFamilyKey)
{
var sourceWithoutArguments = fontFamilyKey.Source.OriginalString.Split('?').First();
if (sourceWithoutArguments.EndsWith(".ttf") ||
sourceWithoutArguments.EndsWith(".otf"))
{
return(GetFontAssetsByExpression(fontFamilyKey));
}
return(GetFontAssetsBySource(fontFamilyKey));
}
/// <summary> /// Loads all font assets that belong to the specified <see cref="FontFamilyKey"/> /// </summary> /// <param name="fontFamilyKey"></param> /// <returns></returns> public static IEnumerable <Uri> LoadFontAssets(FontFamilyKey fontFamilyKey) => IsFontTtfOrOtf(fontFamilyKey.Source) ? GetFontAssetsByExpression(fontFamilyKey) : GetFontAssetsBySource(fontFamilyKey);
public static IEnumerable <Uri> LoadFontAssets(FontFamilyKey fontFamilyKey)
{
return(fontFamilyKey.FileName != null
? GetFontAssetsByFileName(fontFamilyKey.Location, fontFamilyKey.FileName)
: GetFontAssetsByLocation(fontFamilyKey.Location));
}