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Parse epub CSS

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This commit is contained in:
Marco Gavelli
2018-07-16 12:13:40 +02:00
parent 917c3c0bb8
commit 02911d9550
4 changed files with 96 additions and 33 deletions
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87
QuickLook.Plugin/QuickLook.Plugin.EpubViewer/BookHtmlContent.cs Normal file
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@@ -0,0 +1,87 @@
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Media.Imaging;
using TheArtOfDev.HtmlRenderer.Core.Entities;
using TheArtOfDev.HtmlRenderer.WPF;
using VersOne.Epub;
namespace QuickLook.Plugin.EpubViewer
{
public class BookHtmlContent : HtmlPanel
{
public static readonly DependencyProperty ChapterRefProperty = DependencyProperty.Register("ChapterRef", typeof(EpubChapterRef), typeof(BookHtmlContent), new PropertyMetadata(OnChapterRefChanged));
public EpubChapterRef ChapterRef
{
get { return (EpubChapterRef)GetValue(ChapterRefProperty); }
set { SetValue(ChapterRefProperty, value); }
}
public static readonly DependencyProperty EpubBookProperty = DependencyProperty.Register("EpubBook", typeof(EpubBookRef), typeof(BookHtmlContent), new PropertyMetadata(null));
public EpubBookRef EpubBook
{
get { return (EpubBookRef)GetValue(EpubBookProperty); }
set { SetValue(EpubBookProperty, value); }
}
protected override void OnStylesheetLoad(HtmlStylesheetLoadEventArgs args)
{
string styleSheetFilePath = GetFullPath(ChapterRef.ContentFileName, args.Src);
if (EpubBook.Content.Css.TryGetValue(styleSheetFilePath, out EpubTextContentFileRef styleSheetContent))
{
args.SetStyleSheet = styleSheetContent.ReadContentAsText();
}
}
protected override async void OnImageLoad(HtmlImageLoadEventArgs args)
{
string imageFilePath = GetFullPath(ChapterRef.ContentFileName, args.Src);
if (EpubBook.Content.Images.TryGetValue(imageFilePath, out EpubByteContentFileRef imageContent))
{
using (MemoryStream imageStream = new MemoryStream(await imageContent.ReadContentAsBytesAsync()))
{
BitmapImage bitmapImage = new BitmapImage();
bitmapImage.BeginInit();
bitmapImage.StreamSource = imageStream;
bitmapImage.CacheOption = BitmapCacheOption.OnLoad;
bitmapImage.EndInit();
bitmapImage.Freeze();
args.Callback(bitmapImage);
}
args.Handled = true;
}
}
private string GetFullPath(string htmlFilePath, string relativePath)
{
if (relativePath.StartsWith("/"))
{
return relativePath.Length > 1 ? relativePath.Substring(1) : String.Empty;
}
string basePath = System.IO.Path.GetDirectoryName(htmlFilePath);
while (relativePath.StartsWith("../"))
{
relativePath = relativePath.Length > 3 ? relativePath.Substring(3) : String.Empty;
basePath = System.IO.Path.GetDirectoryName(basePath);
}
string fullPath = String.Concat(basePath.Replace('\\', '/'), '/', relativePath);
return fullPath.Length > 1 ? fullPath.Substring(1) : String.Empty;
}
private static async void OnChapterRefChanged(DependencyObject dependencyObject, DependencyPropertyChangedEventArgs e)
{
BookHtmlContent bookHtmlContent = dependencyObject as BookHtmlContent;
if (bookHtmlContent == null || bookHtmlContent.ChapterRef == null)
{
return;
}
bookHtmlContent.Text = await bookHtmlContent.ChapterRef.ReadHtmlContentAsync();
}
}
}

2
QuickLook.Plugin/QuickLook.Plugin.EpubViewer/EpubViewerControl.xaml
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@@ -39,7 +39,7 @@
Style="{DynamicResource CaptionTextButtonStyle}"/>
</StackPanel>
</Grid>
<htmlViewer:HtmlPanel x:Name="pagePanel"
<local:BookHtmlContent x:Name="pagePanel"
Grid.Row="1"/>
</Grid>
</UserControl>

37
QuickLook.Plugin/QuickLook.Plugin.EpubViewer/EpubViewerControl.xaml.cs
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@@ -40,32 +40,6 @@ namespace QuickLook.Plugin.EpubViewer
Resources.MergedDictionaries.Clear();
this.DataContext = this;
this.pagePanel.ImageLoad += PagePanel_ImageLoad;
}
private void PagePanel_ImageLoad(object sender, TheArtOfDev.HtmlRenderer.WPF.RoutedEvenArgs<TheArtOfDev.HtmlRenderer.Core.Entities.HtmlImageLoadEventArgs> args)
{
var key = this.epubBook.Content.Images.Keys.FirstOrDefault(k => args.Data.Src.IndexOf(k, StringComparison.InvariantCultureIgnoreCase) >= 0);
if (key != null)
{
var img = ImageFromStream(this.epubBook.Content.Images[key].GetContentStream());
args.Data.Callback(img);
args.Handled = true;
}
}
/// <summary>
/// Get image by resource key.
/// </summary>
public static BitmapImage ImageFromStream(Stream stream)
{
var bitmapImage = new BitmapImage();
bitmapImage.BeginInit();
bitmapImage.StreamSource = stream;
bitmapImage.CacheOption = BitmapCacheOption.OnLoad;
bitmapImage.EndInit();
// bitmapImage.Freeze();
return bitmapImage;
}
internal void SetContent(EpubBookRef epubBook)
@@ -73,7 +47,8 @@ namespace QuickLook.Plugin.EpubViewer
this.epubBook = epubBook;
this.chapterRefs = Flatten(epubBook.GetChapters());
this.currChapter = 0;
this.pagePanel.Text = chapterRefs[currChapter].ReadHtmlContent();
this.pagePanel.EpubBook = epubBook;
this.pagePanel.ChapterRef = chapterRefs[currChapter];
OnPropertyChanged("Chapter");
}
@@ -87,12 +62,12 @@ namespace QuickLook.Plugin.EpubViewer
this.NextChapter();
}
private async void NextChapter()
private void NextChapter()
{
try
{
this.currChapter = Math.Min(this.currChapter + 1, chapterRefs.Count - 1);
this.pagePanel.Text = await chapterRefs[currChapter].ReadHtmlContentAsync();
this.pagePanel.ChapterRef = chapterRefs[currChapter];
if (chapterRefs[currChapter].Anchor != null)
{
this.pagePanel.ScrollToElement(chapterRefs[currChapter].Anchor);
@@ -112,12 +87,12 @@ namespace QuickLook.Plugin.EpubViewer
this.PrevChapter();
}
private async void PrevChapter()
private void PrevChapter()
{
try
{
this.currChapter = Math.Max(this.currChapter - 1, 0);
this.pagePanel.Text = await chapterRefs[currChapter].ReadHtmlContentAsync();
this.pagePanel.ChapterRef = chapterRefs[currChapter];
if (chapterRefs[currChapter].Anchor != null)
{
this.pagePanel.ScrollToElement(chapterRefs[currChapter].Anchor);

1
QuickLook.Plugin/QuickLook.Plugin.EpubViewer/QuickLook.Plugin.EpubViewer.csproj
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@@ -63,6 +63,7 @@
<Compile Include="..\..\GitVersion.cs">
<Link>Properties\GitVersion.cs</Link>
</Compile>
<Compile Include="BookHtmlContent.cs" />
<Compile Include="EpubReader\Entities\EpubBook.cs" />
<Compile Include="EpubReader\Entities\EpubByteContentFile.cs" />
<Compile Include="EpubReader\Entities\EpubChapter.cs" />