108 lines
3.7 KiB
C#
108 lines
3.7 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Globalization;
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using System.Linq;
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using System.Text;
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using SixLabors.ImageSharp;
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using Umbraco.Cms.Core.Media;
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using Umbraco.Cms.Core.Models;
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namespace Umbraco.Cms.Infrastructure.Media
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{
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/// <summary>
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/// Exposes a method that generates an image URL based on the specified options that can be processed by ImageSharp.
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/// </summary>
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/// <seealso cref="Umbraco.Cms.Core.Media.IImageUrlGenerator" />
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public class ImageSharpImageUrlGenerator : IImageUrlGenerator
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{
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/// <inheritdoc />
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public IEnumerable<string> SupportedImageFileTypes { get; }
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/// <summary>
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/// Initializes a new instance of the <see cref="ImageSharpImageUrlGenerator" /> class.
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/// </summary>
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/// <param name="configuration">The ImageSharp configuration.</param>
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public ImageSharpImageUrlGenerator(Configuration configuration)
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: this(configuration.ImageFormats.SelectMany(f => f.FileExtensions).ToArray())
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{ }
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/// <summary>
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/// Initializes a new instance of the <see cref="ImageSharpImageUrlGenerator" /> class.
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/// </summary>
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/// <param name="supportedImageFileTypes">The supported image file types/extensions.</param>
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/// <remarks>
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/// This constructor is only used for testing.
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/// </remarks>
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internal ImageSharpImageUrlGenerator(IEnumerable<string> supportedImageFileTypes) => SupportedImageFileTypes = supportedImageFileTypes;
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/// <inheritdoc/>
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public string GetImageUrl(ImageUrlGenerationOptions options)
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{
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if (options == null)
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{
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return null;
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}
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var imageUrl = new StringBuilder(options.ImageUrl);
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bool queryStringHasStarted = false;
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void AppendQueryString(string value)
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{
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imageUrl.Append(queryStringHasStarted ? '&' : '?');
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queryStringHasStarted = true;
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imageUrl.Append(value);
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}
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void AddQueryString(string key, params IConvertible[] values)
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=> AppendQueryString(key + '=' + string.Join(",", values.Select(x => x.ToString(CultureInfo.InvariantCulture))));
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if (options.FocalPoint != null)
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{
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AddQueryString("rxy", options.FocalPoint.Left, options.FocalPoint.Top);
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}
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if (options.Crop != null)
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{
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AddQueryString("cc", options.Crop.Left, options.Crop.Top, options.Crop.Right, options.Crop.Bottom);
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}
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if (options.ImageCropMode.HasValue)
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{
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AddQueryString("rmode", options.ImageCropMode.Value.ToString().ToLowerInvariant());
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}
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if (options.ImageCropAnchor.HasValue)
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{
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AddQueryString("ranchor", options.ImageCropAnchor.Value.ToString().ToLowerInvariant());
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}
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if (options.Width.HasValue)
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{
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AddQueryString("width", options.Width.Value);
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}
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if (options.Height.HasValue)
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{
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AddQueryString("height", options.Height.Value);
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}
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if (options.Quality.HasValue)
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{
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AddQueryString("quality", options.Quality.Value);
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}
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if (string.IsNullOrWhiteSpace(options.FurtherOptions) == false)
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{
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AppendQueryString(options.FurtherOptions.TrimStart('?', '&'));
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}
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if (string.IsNullOrWhiteSpace(options.CacheBusterValue) == false)
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{
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AddQueryString("rnd", options.CacheBusterValue);
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}
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return imageUrl.ToString();
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}
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}
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}
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