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Included epub library in plugin project

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Marco Gavelli
2018-07-16 10:06:17 +02:00
parent a78428c698
commit a82cacd126
57 changed files with 57 additions and 61 deletions
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40
QuickLook.Plugin/QuickLook.Plugin.EpubViewer/EpubReader/Readers/BookCoverReader.cs Normal file
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using VersOne.Epub.Schema;
namespace VersOne.Epub.Internal
{
internal static class BookCoverReader
{
public static async Task<byte[]> ReadBookCoverAsync(EpubBookRef bookRef)
{
List<EpubMetadataMeta> metaItems = bookRef.Schema.Package.Metadata.MetaItems;
if (metaItems == null || !metaItems.Any())
{
return null;
}
EpubMetadataMeta coverMetaItem = metaItems.FirstOrDefault(metaItem => String.Compare(metaItem.Name, "cover", StringComparison.OrdinalIgnoreCase) == 0);
if (coverMetaItem == null)
{
return null;
}
if (String.IsNullOrEmpty(coverMetaItem.Content))
{
throw new Exception("Incorrect EPUB metadata: cover item content is missing.");
}
EpubManifestItem coverManifestItem = bookRef.Schema.Package.Manifest.FirstOrDefault(manifestItem => String.Compare(manifestItem.Id, coverMetaItem.Content, StringComparison.OrdinalIgnoreCase) == 0);
if (coverManifestItem == null)
{
throw new Exception(String.Format("Incorrect EPUB manifest: item with ID = \"{0}\" is missing.", coverMetaItem.Content));
}
if (!bookRef.Content.Images.TryGetValue(coverManifestItem.Href, out EpubByteContentFileRef coverImageContentFileRef))
{
throw new Exception(String.Format("Incorrect EPUB manifest: item with href = \"{0}\" is missing.", coverManifestItem.Href));
}
byte[] coverImageContent = await coverImageContentFileRef.ReadContentAsBytesAsync().ConfigureAwait(false);
return coverImageContent;
}
}
}