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winston-dewinston-de
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Added back code preview with basic syntax highlighting (#4990)
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5 files changed

+185
-0
lines changed

5 files changed

+185
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lines changed

‎Files/Files.csproj

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@@ -245,6 +245,9 @@
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<Compile Include="UserControls\ArrangementOptions.xaml.cs">
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<DependentUpon>ArrangementOptions.xaml</DependentUpon>
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</Compile>
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<Compile Include="UserControls\FilePreviews\CodePreview.xaml.cs">
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<DependentUpon>CodePreview.xaml</DependentUpon>
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</Compile>
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<Compile Include="UserControls\RestartControl.xaml.cs">
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<DependentUpon>RestartControl.xaml</DependentUpon>
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</Compile>
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<Compile Include="UserControls\Widgets\WidgetsListControl.xaml.cs">
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<DependentUpon>WidgetsListControl.xaml</DependentUpon>
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</Compile>
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<Compile Include="ViewModels\Previews\CodePreviewViewModel.cs" />
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<Compile Include="ViewModels\SidebarViewModel.cs" />
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<Compile Include="ViewModels\BaseJsonSettingsViewModel.cs" />
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<Compile Include="ViewModels\ColumnsViewModel.cs" />
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<SubType>Designer</SubType>
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<Generator>MSBuild:Compile</Generator>
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</Page>
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<Page Include="UserControls\FilePreviews\CodePreview.xaml">
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<SubType>Designer</SubType>
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<Generator>MSBuild:Compile</Generator>
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</Page>
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<Page Include="UserControls\RestartControl.xaml">
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<SubType>Designer</SubType>
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<Generator>MSBuild:Compile</Generator>

‎Files/UserControls/FilePreviews/CodePreview.xaml

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<UserControl
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x:Class="Files.UserControls.FilePreviews.CodePreview"
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xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
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xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
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xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
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xmlns:local="using:Files.UserControls.FilePreviews"
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xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
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d:DesignHeight="300"
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d:DesignWidth="400"
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ActualThemeChanged="UserControl_ActualThemeChanged"
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Loaded="UserControl_Loaded"
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mc:Ignorable="d">
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<Grid>
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<ScrollViewer
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Grid.Row="0"
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HorizontalScrollBarVisibility="Auto"
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HorizontalScrollMode="Auto">
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<RichTextBlock
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Name="codeView"
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Padding="10"
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FontFamily="Consolas" />
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</ScrollViewer>
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</Grid>
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</UserControl>

‎Files/UserControls/FilePreviews/CodePreview.xaml.cs

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@@ -0,0 +1,62 @@
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using ColorCode;
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using Files.ViewModels.Previews;
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Runtime.InteropServices.WindowsRuntime;
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using Windows.Foundation;
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using Windows.Foundation.Collections;
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using Windows.UI.Xaml.Controls;
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using Windows.UI.Xaml.Controls.Primitives;
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using Windows.UI.Xaml.Data;
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using Windows.UI.Xaml.Input;
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using Windows.UI.Xaml.Media;
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using Windows.UI.Xaml.Navigation;
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// The User Control item template is documented at https://go.microsoft.com/fwlink/?LinkId=234236
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namespace Files.UserControls.FilePreviews
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{
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public sealed partial class CodePreview : UserControl
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{
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private RichTextBlockFormatter formatter;
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private bool rendered;
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CodePreviewViewModel ViewModel { get; set; }
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public CodePreview(CodePreviewViewModel model)
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{
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ViewModel = model;
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this.InitializeComponent();
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}
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private void RenderDocument()
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{
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if (codeView != null)
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{
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codeView.Blocks?.Clear();
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formatter = new RichTextBlockFormatter(ActualTheme);
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formatter.FormatRichTextBlock(ViewModel.TextValue, ViewModel.CodeLanguage, codeView);
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rendered = true;
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}
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}
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private void UserControl_Loaded(object sender, Windows.UI.Xaml.RoutedEventArgs e)
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{
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RenderDocument();
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}
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private void UserControl_ActualThemeChanged(Windows.UI.Xaml.FrameworkElement sender, object args)
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{
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try
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{
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rendered = false;
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RenderDocument();
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}
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catch (Exception)
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{
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}
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}
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}
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}

‎Files/ViewModels/PreviewPaneViewModel.cs

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@@ -205,6 +205,13 @@ private async Task<UserControl> GetBuiltInPreviewControlAsync(ListedItem item)
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return new RichTextPreview(model);
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}
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if(CodePreviewViewModel.Extensions.Contains(ext))
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{
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var model = new CodePreviewViewModel(item);
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await model.LoadAsync();
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return new CodePreview(model);
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}
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var control = await TextPreviewViewModel.TryLoadAsTextAsync(SelectedItem);
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if (control != null)
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{

‎Files/ViewModels/Previews/CodePreviewViewModel.cs

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using ColorCode;
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using Files.Extensions;
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using Files.Filesystem;
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using Files.ViewModels.Properties;
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using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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using Windows.Storage;
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namespace Files.ViewModels.Previews
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{
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public class CodePreviewViewModel : BasePreviewModel
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{
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public CodePreviewViewModel(ListedItem item) : base(item)
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{
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}
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private string textValue;
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public string TextValue
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{
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get => textValue;
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set => SetProperty(ref textValue, value);
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}
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private ILanguage codeLanguage;
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public ILanguage CodeLanguage
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{
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get => codeLanguage;
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set => SetProperty(ref codeLanguage, value);
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}
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public static List<string> Extensions => new List<List<string>>(languageExtensions.Values).SelectMany(i => i).Distinct().ToList();
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public async override Task<List<FileProperty>> LoadPreviewAndDetails()
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{
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var details = new List<FileProperty>();
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try
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{
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var text = TextValue ?? await FileIO.ReadTextAsync(Item.ItemFile);
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CodeLanguage = GetCodeLanguage(Item.FileExtension);
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details.Add(new FileProperty()
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{
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NameResource = "PropertyLineCount",
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Value = text.Split("\n").Length,
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});
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var displayText = text.Length < Constants.PreviewPane.TextCharacterLimit ? text : text.Remove(Constants.PreviewPane.TextCharacterLimit);
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TextValue = displayText;
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}
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catch (Exception e)
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{
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Debug.WriteLine(e);
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}
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return details;
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}
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private static Dictionary<ILanguage, List<string>> languageExtensions = new Dictionary<ILanguage, List<string>>()
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{
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{Languages.Xml, new List<string> {".xml", ".axml", ".xaml"} },
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{Languages.CSharp, new List<string> {".cs", ".cake", ".csx", ".linq"} },
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{Languages.Html, new List<string> {".razor", ".cshtml", ".vbhtml", ".svelte"} },
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{Languages.AspxCs, new List<string> { ".acsx" } },
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{Languages.FSharp, new List<string> {".fs", ".fsi", ".fsx" } },
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{Languages.Java, new List<string> {".java" } },
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{Languages.VbDotNet, new List<string> {".vb", ".vbs" } },
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{Languages.Cpp, new List<string> {".cpp", ".c++", ".cc", ".cp", ".cxx", ".h", ".h++", ".hh", ".hpp", ".hxx", ".inc", ".inl", ".ino", ".ipp", ".re", ".tcc", ".tpp" } },
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{Languages.PowerShell, new List<string> {".pwsh", ".ps1", ".psd1", ".psm1" } },
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{Languages.Typescript, new List<string> {".ts", ".tsx"} },
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{Languages.JavaScript, new List<string> {".js", ".jsx"} },
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{Languages.Php, new List<string> {".php"} },
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{Languages.Css, new List<string> {".css", ".scss"} },
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{Languages.Haskell, new List<string> {".hs"} },
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{Languages.Aspx, new List<string> {".aspx"} },
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};
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private static ILanguage GetCodeLanguage(string ext) => languageExtensions.FirstOrDefault(x => x.Value.Contains(ext)).Key;
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}
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}

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