feat: support view model closing view window

- Change exception type from ArgumentOutOfRangeException to ArgumentException
- Fix node seeking logic by correcting candidate order
- Update Visit, Insert, and Remove methods with proper range checks
- Enhance cursor management after removal operations
- Add comprehensive test cases for edge scenarios
- Introduce AssertExtension for better exception testing
- Handle empty collection states more robustly

BallanceTASEditor.sln

@@ -1,31 +0,0 @@
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-Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio Version 17
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-MinimumVisualStudioVersion = 10.0.40219.1
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "BallanceTasEditor", "BallanceTasEditor\BallanceTasEditor.csproj", "{DD898514-03ED-4257-AFD1-290EEDF68113}"
-EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "BallanceTasEditorTest", "BallanceTasEditorTest\BallanceTasEditorTest.csproj", "{1DC1A8CD-E963-4FF8-91D9-059522419961}"
-EndProject
-Global
-	GlobalSection(SolutionConfigurationPlatforms) = preSolution
-		Debug|Any CPU = Debug|Any CPU
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-	EndGlobalSection
-	GlobalSection(ProjectConfigurationPlatforms) = postSolution
-		{DD898514-03ED-4257-AFD1-290EEDF68113}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{DD898514-03ED-4257-AFD1-290EEDF68113}.Debug|Any CPU.Build.0 = Debug|Any CPU
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-		{DD898514-03ED-4257-AFD1-290EEDF68113}.Release|Any CPU.Build.0 = Release|Any CPU
-		{1DC1A8CD-E963-4FF8-91D9-059522419961}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{1DC1A8CD-E963-4FF8-91D9-059522419961}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{1DC1A8CD-E963-4FF8-91D9-059522419961}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{1DC1A8CD-E963-4FF8-91D9-059522419961}.Release|Any CPU.Build.0 = Release|Any CPU
-	EndGlobalSection
-	GlobalSection(SolutionProperties) = preSolution
-		HideSolutionNode = FALSE
-	EndGlobalSection
-	GlobalSection(ExtensibilityGlobals) = postSolution
-		SolutionGuid = {5A4468A2-79ED-47F3-80FE-299A89DE9D0E}
-	EndGlobalSection
-EndGlobal

BallanceTASEditor/App.xaml

@@ -1,9 +0,0 @@
-<Application x:Class="BallanceTasEditor.App"
-             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
-             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
-             xmlns:local="clr-namespace:BallanceTasEditor"
-             StartupUri="Views/MainWindow.xaml">
-    <Application.Resources>
-         
-    </Application.Resources>
-</Application>

BallanceTASEditor/BallanceTASEditor.csproj

@@ -1,151 +0,0 @@
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-<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
-  <PropertyGroup>
-    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
-    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
-    <ProjectGuid>{DD898514-03ED-4257-AFD1-290EEDF68113}</ProjectGuid>
-    <OutputType>WinExe</OutputType>
-    <RootNamespace>BallanceTasEditor</RootNamespace>
-    <AssemblyName>BallanceTasEditor</AssemblyName>
-    <TargetFrameworkVersion>v4.8</TargetFrameworkVersion>
-    <FileAlignment>512</FileAlignment>
-    <ProjectTypeGuids>{60dc8134-eba5-43b8-bcc9-bb4bc16c2548};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
-    <WarningLevel>4</WarningLevel>
-    <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
-    <Deterministic>true</Deterministic>
-    <NuGetPackageImportStamp>
-    </NuGetPackageImportStamp>
-  </PropertyGroup>
-  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
-    <PlatformTarget>AnyCPU</PlatformTarget>
-    <DebugSymbols>true</DebugSymbols>
-    <DebugType>full</DebugType>
-    <Optimize>false</Optimize>
-    <OutputPath>bin\Debug\</OutputPath>
-    <DefineConstants>DEBUG;TRACE</DefineConstants>
-    <ErrorReport>prompt</ErrorReport>
-    <WarningLevel>4</WarningLevel>
-  </PropertyGroup>
-  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
-    <PlatformTarget>AnyCPU</PlatformTarget>
-    <DebugType>pdbonly</DebugType>
-    <Optimize>true</Optimize>
-    <OutputPath>bin\Release\</OutputPath>
-    <DefineConstants>TRACE</DefineConstants>
-    <ErrorReport>prompt</ErrorReport>
-    <WarningLevel>4</WarningLevel>
-  </PropertyGroup>
-  <PropertyGroup>
-    <ApplicationIcon>App.ico</ApplicationIcon>
-  </PropertyGroup>
-  <ItemGroup>
-    <Reference Include="CommunityToolkit.Mvvm, Version=8.2.0.0, Culture=neutral, PublicKeyToken=4aff67a105548ee2, processorArchitecture=MSIL">
-      <HintPath>..\packages\CommunityToolkit.Mvvm.8.2.1\lib\netstandard2.0\CommunityToolkit.Mvvm.dll</HintPath>
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-    <Reference Include="System.Core" />
-    <Reference Include="System.Xml.Linq" />
-    <Reference Include="System.Data.DataSetExtensions" />
-    <Reference Include="System.Net.Http" />
-    <Reference Include="System.Xaml">
-      <RequiredTargetFramework>4.0</RequiredTargetFramework>
-    </Reference>
-    <Reference Include="WindowsBase" />
-    <Reference Include="PresentationCore" />
-    <Reference Include="PresentationFramework" />
-  </ItemGroup>
-  <ItemGroup>
-    <ApplicationDefinition Include="App.xaml">
-      <Generator>MSBuild:Compile</Generator>
-      <SubType>Designer</SubType>
-    </ApplicationDefinition>
-    <Page Include="Views\MainWindow.xaml">
-      <Generator>MSBuild:Compile</Generator>
-      <SubType>Designer</SubType>
-    </Page>
-    <Compile Include="App.xaml.cs">
-      <DependentUpon>App.xaml</DependentUpon>
-      <SubType>Code</SubType>
-    </Compile>
-    <Compile Include="Utils\TasFrame.cs" />
-    <Compile Include="Views\MainWindow.xaml.cs">
-      <DependentUpon>MainWindow.xaml</DependentUpon>
-      <SubType>Code</SubType>
-    </Compile>
-  </ItemGroup>
-  <ItemGroup>
-    <Compile Include="Properties\AssemblyInfo.cs">
-      <SubType>Code</SubType>
-    </Compile>
-    <Compile Include="Properties\Resources.Designer.cs">
-      <AutoGen>True</AutoGen>
-      <DesignTime>True</DesignTime>
-      <DependentUpon>Resources.resx</DependentUpon>
-    </Compile>
-    <Compile Include="Properties\Settings.Designer.cs">
-      <AutoGen>True</AutoGen>
-      <DependentUpon>Settings.settings</DependentUpon>
-      <DesignTimeSharedInput>True</DesignTimeSharedInput>
-    </Compile>
-    <EmbeddedResource Include="Properties\Resources.resx">
-      <Generator>ResXFileCodeGenerator</Generator>
-      <LastGenOutput>Resources.Designer.cs</LastGenOutput>
-    </EmbeddedResource>
-    <None Include="packages.config" />
-    <None Include="Properties\Settings.settings">
-      <Generator>SettingsSingleFileGenerator</Generator>
-      <LastGenOutput>Settings.Designer.cs</LastGenOutput>
-    </None>
-  </ItemGroup>
-  <ItemGroup>
-    <None Include="App.config" />
-  </ItemGroup>
-  <ItemGroup>
-    <Folder Include="Models\" />
-    <Folder Include="ViewModels\" />
-  </ItemGroup>
-  <ItemGroup>
-    <Resource Include="Assets\App.ico" />
-  </ItemGroup>
-  <ItemGroup>
-    <Resource Include="App.ico" />
-  </ItemGroup>
-  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
-  <Import Project="..\packages\CommunityToolkit.Mvvm.8.2.1\build\netstandard2.0\CommunityToolkit.Mvvm.targets" Condition="Exists('..\packages\CommunityToolkit.Mvvm.8.2.1\build\netstandard2.0\CommunityToolkit.Mvvm.targets')" />
-  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
-    <PropertyGroup>
-      <ErrorText>This project references NuGet package(s) that are missing on this computer. Use NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
-    </PropertyGroup>
-    <Error Condition="!Exists('..\packages\CommunityToolkit.Mvvm.8.2.1\build\netstandard2.0\CommunityToolkit.Mvvm.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\CommunityToolkit.Mvvm.8.2.1\build\netstandard2.0\CommunityToolkit.Mvvm.targets'))" />
-  </Target>
-</Project>

BallanceTASEditor/Properties/AssemblyInfo.cs

@@ -1,52 +0,0 @@
-using System.Reflection;
-using System.Resources;
-using System.Runtime.CompilerServices;
-using System.Runtime.InteropServices;
-using System.Windows;
-
-// General Information about an assembly is controlled through the following
-// set of attributes. Change these attribute values to modify the information
-// associated with an assembly.
-[assembly: AssemblyTitle("BallanceTasEditor")]
-[assembly: AssemblyDescription("")]
-[assembly: AssemblyConfiguration("")]
-[assembly: AssemblyCompany("")]
-[assembly: AssemblyProduct("BallanceTasEditor")]
-[assembly: AssemblyCopyright("Copyright ©  2025")]
-[assembly: AssemblyTrademark("")]
-[assembly: AssemblyCulture("")]
-
-// Setting ComVisible to false makes the types in this assembly not visible
-// to COM components.  If you need to access a type in this assembly from
-// COM, set the ComVisible attribute to true on that type.
-[assembly: ComVisible(false)]
-
-//In order to begin building localizable applications, set
-//<UICulture>CultureYouAreCodingWith</UICulture> in your .csproj file
-//inside a <PropertyGroup>.  For example, if you are using US english
-//in your source files, set the <UICulture> to en-US.  Then uncomment
-//the NeutralResourceLanguage attribute below.  Update the "en-US" in
-//the line below to match the UICulture setting in the project file.
-
-//[assembly: NeutralResourcesLanguage("en-US", UltimateResourceFallbackLocation.Satellite)]
-
-
-[assembly: ThemeInfo(
-    ResourceDictionaryLocation.None, //where theme specific resource dictionaries are located
-                                     //(used if a resource is not found in the page,
-                                     // or application resource dictionaries)
-    ResourceDictionaryLocation.SourceAssembly //where the generic resource dictionary is located
-                                              //(used if a resource is not found in the page,
-                                              // app, or any theme specific resource dictionaries)
-)]
-
-
-// Version information for an assembly consists of the following four values:
-//
-//      Major Version
-//      Minor Version
-//      Build Number
-//      Revision
-//
-[assembly: AssemblyVersion("1.0.0.0")]
-[assembly: AssemblyFileVersion("1.0.0.0")]

BallanceTASEditor/Properties/Resources.Designer.cs

@@ -1,62 +0,0 @@
-//------------------------------------------------------------------------------
-// <auto-generated>
-//     This code was generated by a tool.
-//     Runtime Version:4.0.30319.42000
-//
-//     Changes to this file may cause incorrect behavior and will be lost if
-//     the code is regenerated.
-// </auto-generated>
-//------------------------------------------------------------------------------
-
-namespace BallanceTasEditor.Properties {
-
-
-    /// <summary>
-    ///   A strongly-typed resource class, for looking up localized strings, etc.
-    /// </summary>
-    // This class was auto-generated by the StronglyTypedResourceBuilder
-    // class via a tool like ResGen or Visual Studio.
-    // To add or remove a member, edit your .ResX file then rerun ResGen
-    // with the /str option, or rebuild your VS project.
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("System.Resources.Tools.StronglyTypedResourceBuilder", "4.0.0.0")]
-    [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
-    [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
-    internal class Resources {
-
-        private static global::System.Resources.ResourceManager resourceMan;
-
-        private static global::System.Globalization.CultureInfo resourceCulture;
-
-        [global::System.Diagnostics.CodeAnalysis.SuppressMessageAttribute("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
-        internal Resources() {
-        }
-
-        /// <summary>
-        ///   Returns the cached ResourceManager instance used by this class.
-        /// </summary>
-        [global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
-        internal static global::System.Resources.ResourceManager ResourceManager {
-            get {
-                if ((resourceMan == null)) {
-                    global::System.Resources.ResourceManager temp = new global::System.Resources.ResourceManager("BallanceTasEditor.Properties.Resources", typeof(Resources).Assembly);
-                    resourceMan = temp;
-                }
-                return resourceMan;
-            }
-        }
-
-        /// <summary>
-        ///   Overrides the current thread's CurrentUICulture property for all
-        ///   resource lookups using this strongly typed resource class.
-        /// </summary>
-        [global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
-        internal static global::System.Globalization.CultureInfo Culture {
-            get {
-                return resourceCulture;
-            }
-            set {
-                resourceCulture = value;
-            }
-        }
-    }
-}

BallanceTASEditor/Properties/Settings.Designer.cs

@@ -1,26 +0,0 @@
-//------------------------------------------------------------------------------
-// <auto-generated>
-//     This code was generated by a tool.
-//     Runtime Version:4.0.30319.42000
-//
-//     Changes to this file may cause incorrect behavior and will be lost if
-//     the code is regenerated.
-// </auto-generated>
-//------------------------------------------------------------------------------
-
-namespace BallanceTasEditor.Properties {
-
-
-    [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.VisualStudio.Editors.SettingsDesigner.SettingsSingleFileGenerator", "11.0.0.0")]
-    internal sealed partial class Settings : global::System.Configuration.ApplicationSettingsBase {
-
-        private static Settings defaultInstance = ((Settings)(global::System.Configuration.ApplicationSettingsBase.Synchronized(new Settings())));
-
-        public static Settings Default {
-            get {
-                return defaultInstance;
-            }
-        }
-    }
-}

BallanceTASEditor/Utils/TasFrame.cs

@@ -1,105 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Runtime.InteropServices;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace BallanceTasEditor.Utils {
-
-    /// <summary>
-    /// 描述TAS文件中一帧的结构。
-    /// </summary>
-    [StructLayout(LayoutKind.Sequential)]
-    public struct TasFrame {
-        /// <summary>
-        /// 该帧的持续时间（以秒为单位）。
-        /// </summary>
-        public float TimeDelta;
-        /// <summary>
-        /// 该帧的按键组合。
-        /// </summary>
-        public uint KeyFlags;
-
-        /// <summary>
-        /// 判断按键是否被按下。
-        /// </summary>
-        /// <param name="key">要检查的按键。</param>
-        /// <returns>true表示被按下，否则为false。</returns>
-        public bool IsKeyPressed(TasKey key) {
-            return (KeyFlags & (1u << (int)key)) != 0;
-        }
-
-        /// <summary>
-        /// 设置按键状态。
-        /// </summary>
-        /// <param name="key">要设置的按键。</param>
-        /// <param name="pressed">true表示设置为按下，否则为松开。</param>
-        public void SetKeyPressed(TasKey key, bool pressed = true) {
-            if (pressed) KeyFlags |= (1u << (int)key);
-            else KeyFlags &= ~(1u << (int)key);
-        }
-
-        /// <summary>
-        /// 反转按键状态。
-        /// </summary>
-        /// <param name="key">要反转的按键。</param>
-        public void FlipKeyPressed(TasKey key) {
-            KeyFlags ^= (1u << (int)key);
-        }
-
-        /// <summary>
-        /// 获取或设置Up键的按下状态。
-        /// </summary>
-        public bool KeyUpPressed { get { return IsKeyPressed(TasKey.KeyUp); } set { SetKeyPressed(TasKey.KeyUp, value); } }
-        /// <summary>
-        /// 获取或设置Down键的按下状态。
-        /// </summary>
-        public bool KeyDownPressed { get { return IsKeyPressed(TasKey.KeyDown); } set { SetKeyPressed(TasKey.KeyDown, value); } }
-        /// <summary>
-        /// 获取或设置Left键的按下状态。
-        /// </summary>
-        public bool KeyLeftPressed { get { return IsKeyPressed(TasKey.KeyLeft); } set { SetKeyPressed(TasKey.KeyLeft, value); } }
-        /// <summary>
-        /// 获取或设置Right键的按下状态。
-        /// </summary>
-        public bool KeyRightPressed { get { return IsKeyPressed(TasKey.KeyRight); } set { SetKeyPressed(TasKey.KeyRight, value); } }
-        /// <summary>
-        /// 获取或设置Shift键的按下状态。
-        /// </summary>
-        public bool KeyShiftPressed { get { return IsKeyPressed(TasKey.KeyShift); } set { SetKeyPressed(TasKey.KeyShift, value); } }
-        /// <summary>
-        /// 获取或设置Space键的按下状态。
-        /// </summary>
-        public bool KeySpacePressed { get { return IsKeyPressed(TasKey.KeySpace); } set { SetKeyPressed(TasKey.KeySpace, value); } }
-        /// <summary>
-        /// 获取或设置Q键的按下状态。
-        /// </summary>
-        public bool KeyQPressed { get { return IsKeyPressed(TasKey.KeyQ); } set { SetKeyPressed(TasKey.KeyQ, value); } }
-        /// <summary>
-        /// 获取或设置Esc键的按下状态。
-        /// </summary>
-        public bool KeyEscPressed { get { return IsKeyPressed(TasKey.KeyEsc); } set { SetKeyPressed(TasKey.KeyEsc, value); } }
-        /// <summary>
-        /// 获取或设置回车键的按下状态。
-        /// </summary>
-        public bool KeyEnterPressed { get { return IsKeyPressed(TasKey.KeyEnter); } set { SetKeyPressed(TasKey.KeyEnter, value); } }
-
-    }
-
-    /// <summary>
-    /// 描述TAS文件中的可能的按键。
-    /// </summary>
-    public enum TasKey : int {
-        KeyUp = 0,
-        KeyDown = 1,
-        KeyLeft = 2,
-        KeyRight = 3,
-        KeyShift = 4,
-        KeySpace = 5,
-        KeyQ = 6,
-        KeyEsc = 7,
-        KeyEnter = 8,
-    }
-
-}

BallanceTASEditor/Views/MainWindow.xaml

@@ -1,12 +0,0 @@
-<Window x:Class="BallanceTasEditor.Views.MainWindow"
-        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
-        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
-        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
-        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-        xmlns:local="clr-namespace:BallanceTasEditor.Views"
-        mc:Ignorable="d"
-        Title="MainWindow" Height="450" Width="800" Icon="/Assets/App.ico">
-    <Grid>
-        
-    </Grid>
-</Window>

BallanceTASEditor/app.config

@@ -1,22 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<configuration>
-    <startup> 
-        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.8" />
-    </startup>
-  <runtime>
-    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
-      <dependentAssembly>
-        <assemblyIdentity name="System.Runtime.CompilerServices.Unsafe" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-6.0.0.0" newVersion="6.0.0.0" />
-      </dependentAssembly>
-      <dependentAssembly>
-        <assemblyIdentity name="System.ComponentModel.Annotations" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-4.2.1.0" newVersion="4.2.1.0" />
-      </dependentAssembly>
-      <dependentAssembly>
-        <assemblyIdentity name="System.Buffers" publicKeyToken="cc7b13ffcd2ddd51" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-4.0.3.0" newVersion="4.0.3.0" />
-      </dependentAssembly>
-    </assemblyBinding>
-  </runtime>
-</configuration>

BallanceTASEditor/packages.config

@@ -1,12 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<packages>
-  <package id="CommunityToolkit.Mvvm" version="8.2.1" targetFramework="net48" />
-  <package id="DotNetZip" version="1.9.1.8" targetFramework="net48" />
-  <package id="Microsoft.Bcl.AsyncInterfaces" version="7.0.0" targetFramework="net48" />
-  <package id="System.Buffers" version="4.5.1" targetFramework="net48" />
-  <package id="System.ComponentModel.Annotations" version="5.0.0" targetFramework="net48" />
-  <package id="System.Memory" version="4.5.5" targetFramework="net48" />
-  <package id="System.Numerics.Vectors" version="4.5.0" targetFramework="net48" />
-  <package id="System.Runtime.CompilerServices.Unsafe" version="6.0.0" targetFramework="net48" />
-  <package id="System.Threading.Tasks.Extensions" version="4.5.4" targetFramework="net48" />
-</packages>

BallanceTasEditor/Assets/AppIcons/.gitignore

@@ -0,0 +1,5 @@
+# Ignore generated files
+*.bat
+*.sh
+*.ico
+*.png

BallanceTasEditor/Assets/AppIcons/About.svg

@@ -0,0 +1,52 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   viewBox="0 0 24 24"
+   version="1.1"
+   id="svg1"
+   sodipodi:docname="MenuAbout.svg"
+   inkscape:export-filename="MenuAbout.png"
+   inkscape:export-xdpi="1024"
+   inkscape:export-ydpi="1024"
+   inkscape:version="1.3.2 (091e20e, 2023-11-25, custom)"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg">
+  <defs
+     id="defs1" />
+  <sodipodi:namedview
+     id="namedview1"
+     pagecolor="#ffffff"
+     bordercolor="#000000"
+     borderopacity="0.25"
+     inkscape:showpageshadow="2"
+     inkscape:pageopacity="0.0"
+     inkscape:pagecheckerboard="0"
+     inkscape:deskcolor="#d1d1d1"
+     showgrid="false"
+     inkscape:zoom="8.2291667"
+     inkscape:cx="18.106329"
+     inkscape:cy="5.7113924"
+     inkscape:window-width="1920"
+     inkscape:window-height="1017"
+     inkscape:window-x="-8"
+     inkscape:window-y="-8"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="svg1" />
+  <path
+     d="M 13,9 H 11 V 7 h 2 m 0,10 h -2 v -6 h 2 M 12,2 A 10,10 0 0 0 2,12 10,10 0 0 0 12,22 10,10 0 0 0 22,12 10,10 0 0 0 12,2 Z"
+     id="path1"
+     style="display:none" />
+  <path
+     style="fill:#2196f3;fill-opacity:1;stroke-width:0.000911392"
+     d="M 11.331646,21.963844 C 10.350843,21.895612 9.2782955,21.655947 8.3848101,21.305362 7.073815,20.790955 5.9477316,20.049837 4.9354663,19.035217 3.2965843,17.392523 2.3386597,15.380387 2.0634649,13.002532 c -0.047583,-0.41115 -0.047583,-1.593914 0,-2.005064 C 2.2936647,9.0083985 3.0074126,7.2671058 4.2115248,5.756962 4.5556094,5.3254265 5.3306962,4.5509678 5.756962,4.2127774 7.2569939,3.0226832 8.9585632,2.3129438 10.877027,2.0771533 c 0.55463,-0.068167 1.691316,-0.068167 2.245946,0 1.913756,0.2352119 3.64152,0.9554548 5.120065,2.1343715 0.42793,0.3412098 1.204026,1.1170463 1.540553,1.5400384 1.212522,1.5240584 1.924504,3.259118 2.152658,5.2459048 0.04781,0.416369 0.0489,1.531707 0.0019,1.971736 -0.210539,1.971877 -0.927503,3.72952 -2.151259,5.273834 -0.337806,0.426291 -1.112351,1.201462 -1.543867,1.545114 -1.509369,1.202033 -3.301249,1.937356 -5.225316,2.144284 -0.419189,0.04508 -1.263447,0.06081 -1.686076,0.03141 z m 1.670886,-7.958781 V 10.997468 H 12 10.997468 v 3.007595 3.007595 H 12 13.002532 Z m 0,-5.9999997 V 6.9873418 H 12 10.997468 V 8.0050633 9.0227848 H 12 13.002532 Z"
+     id="path2" />
+  <path
+     style="fill:#ffffff;fill-opacity:1;stroke-width:0.000911392"
+     d="M 10.997468,8.0050633 V 6.9873418 H 12 13.002532 V 8.0050633 9.0227848 H 12 10.997468 Z"
+     id="path3" />
+  <path
+     style="fill:#ffffff;fill-opacity:1;stroke-width:0.000911392"
+     d="M 10.997468,14.005063 V 10.997468 H 12 13.002532 v 3.007595 3.007595 H 12 10.997468 Z"
+     id="path4" />
+</svg>

BallanceTasEditor/Assets/AppIcons/AddFrame.svg

@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   viewBox="0 0 24 24"
+   version="1.1"
+   id="svg1"
+   sodipodi:docname="CtxMenuAdd.svg"
+   inkscape:version="1.3.2 (091e20e, 2023-11-25, custom)"
+   inkscape:export-filename="CtxMenuAdd.png"
+   inkscape:export-xdpi="1024"
+   inkscape:export-ydpi="1024"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg">
+  <defs
+     id="defs1" />
+  <sodipodi:namedview
+     id="namedview1"
+     pagecolor="#ffffff"
+     bordercolor="#000000"
+     borderopacity="0.25"
+     inkscape:showpageshadow="2"
+     inkscape:pageopacity="0.0"
+     inkscape:pagecheckerboard="0"
+     inkscape:deskcolor="#d1d1d1"
+     inkscape:zoom="23.275598"
+     inkscape:cx="13.469042"
+     inkscape:cy="11.814949"
+     inkscape:window-width="1920"
+     inkscape:window-height="1017"
+     inkscape:window-x="-8"
+     inkscape:window-y="-8"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="svg1" />
+  <path
+     d="m 11,2 a 2,2 0 0 1 2,2 v 16 a 2,2 0 0 1 -2,2 H 2 V 2 h 9 m -7,8 v 4 h 7 V 10 H 4 m 0,6 v 4 h 7 V 16 H 4 M 4,4 v 4 h 7 V 4 H 4 m 11,7 h 3 V 8 h 2 v 3 h 3 v 2 h -3 v 3 h -2 v -3 h -3 z"
+     id="path1"
+     style="display:none" />
+  <path
+     style="fill:#607d8b;fill-opacity:1;stroke-width:0.0012889"
+     d="M 2.0192821,12.009734 V 2.0192821 h 4.5734928 c 3.2470388,0 4.6395251,0.014132 4.8011651,0.048725 0.70855,0.1516385 1.310681,0.7145009 1.501846,1.4039032 0.07566,0.2728392 0.07918,0.6513922 0.07918,8.5156767 0,7.156645 -0.0084,8.262238 -0.06409,8.476192 -0.176436,0.677383 -0.615301,1.157706 -1.29273,1.414847 l -0.254312,0.09653 -4.6722757,0.01251 -4.6722752,0.01251 z m 9.0223249,5.991952 V 15.982403 H 7.5186037 3.9956008 v 2.019283 2.019282 h 3.5230029 3.5230033 z m 0,-6.014883 V 9.9675204 H 7.5186037 3.9956008 v 2.0192826 2.019282 h 3.5230029 3.5230033 z m 0,-5.97192 V 3.9956008 H 7.5186037 3.9956008 V 6.014883 8.0341651 h 3.5230029 3.5230033 z"
+     id="path2" />
+  <path
+     style="fill:#4caf50;fill-opacity:1;stroke-width:0.0012889"
+     d="m 18.001686,14.478683 v -1.503721 h -1.482239 -1.48224 v -0.988159 -0.98816 h 1.48224 1.482239 V 9.5164042 8.0341651 h 0.988159 0.988159 v 1.4822391 1.4822388 h 1.503721 1.503721 v 0.98816 0.988159 h -1.503721 -1.503721 v 1.503721 1.50372 h -0.988159 -0.988159 z"
+     id="path3" />
+</svg>

BallanceTasEditor/Assets/AppIcons/BuildBuildIcons.py

@@ -0,0 +1,32 @@
+import pathlib
+
+def fetch_svg_files() -> tuple[pathlib.Path, ...]:
+    return tuple(file for file in pathlib.Path("./").glob("*.svg"))
+
+def generate_windows_script(svg_files: tuple[pathlib.Path, ...]) -> None:
+    with open("./BuildIcons.bat", "w", encoding="utf-8") as f:
+        for svg_file in svg_files:
+            png_file = f'{svg_file.stem}.png'
+            ico_file = f'{svg_file.stem}.ico'
+            f.write(f"inkscape --without-gui {svg_file} -o {png_file} -w 250 -h 256\n")
+            f.write(f"magick {png_file} -define icon:auto-resize=256,128,64,48,32,16 {ico_file}\n")
+
+def generate_linux_script(svg_files: tuple[pathlib.Path, ...]) -> None:
+    with open("./BuildIcons.sh", "w", encoding="utf-8") as f:
+        for svg_file in svg_files:
+            png_file = f'{svg_file.stem}.png'
+            ico_file = f'{svg_file.stem}.ico'
+            f.write(f"inkscape --without-gui {svg_file} -o {png_file} -w 250 -h 256\n")
+            f.write(f"magick {png_file} -define icon:auto-resize=256,128,64,48,32,16 {ico_file}\n")
+
+def main():
+    print("Fetching SVG files...")
+    svg_files = fetch_svg_files()
+    print("Building Windows script...")
+    generate_windows_script(svg_files)
+    print("Building Linux script...")
+    generate_linux_script(svg_files)
+    print("Done!")
+
+if __name__ == "__main__":
+    main()

BallanceTasEditor/Assets/AppIcons/Cancel.svg

@@ -0,0 +1,41 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   viewBox="0 0 24 24"
+   version="1.1"
+   id="svg1"
+   sodipodi:docname="Cancel.svg"
+   inkscape:version="1.3.2 (091e20e, 2023-11-25, custom)"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg">
+  <defs
+     id="defs1" />
+  <sodipodi:namedview
+     id="namedview1"
+     pagecolor="#ffffff"
+     bordercolor="#000000"
+     borderopacity="0.25"
+     inkscape:showpageshadow="2"
+     inkscape:pageopacity="0.0"
+     inkscape:pagecheckerboard="0"
+     inkscape:deskcolor="#d1d1d1"
+     showgrid="false"
+     inkscape:zoom="32.916667"
+     inkscape:cx="12"
+     inkscape:cy="12"
+     inkscape:window-width="1920"
+     inkscape:window-height="1017"
+     inkscape:window-x="-8"
+     inkscape:window-y="-8"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="svg1" />
+  <path
+     d="M 12,2 C 17.5,2 22,6.5 22,12 22,17.5 17.5,22 12,22 6.5,22 2,17.5 2,12 2,6.5 6.5,2 12,2 m 0,2 C 10.1,4 8.4,4.6 7.1,5.7 L 18.3,16.9 C 19.3,15.5 20,13.8 20,12 20,7.6 16.4,4 12,4 M 16.9,18.3 5.7,7.1 C 4.6,8.4 4,10.1 4,12 c 0,4.4 3.6,8 8,8 1.9,0 3.6,-0.6 4.9,-1.7 z"
+     id="path1"
+     style="display:none" />
+  <path
+     style="fill:#f44336;fill-opacity:1;stroke-width:0.000911392"
+     d="M 11.529114,21.976736 C 10.22238,21.889141 9.0970988,21.622033 8.0114321,21.141743 5.0411839,19.827731 2.8549818,17.127924 2.2192797,13.988839 2.0648176,13.226108 2.0373265,12.925617 2.0373265,12 c 0,-0.925617 0.027491,-1.226108 0.1819532,-1.988839 C 2.9672398,6.3177478 5.8643146,3.2688861 9.5104706,2.3379617 10.411349,2.1079524 11.074436,2.0255288 12.01519,2.026618 c 1.996985,0.00231 3.807406,0.5499071 5.467923,1.6538737 2.455605,1.6325675 4.010624,4.1204917 4.426934,7.0827903 0.07357,0.523513 0.07357,1.949923 0,2.473436 -0.326722,2.324832 -1.359557,4.372036 -2.997659,5.94173 -1.596575,1.5299 -3.611736,2.485613 -5.773541,2.738166 -0.389906,0.04555 -1.312862,0.08002 -1.609733,0.06012 z m 1.563357,-2.032544 c 0.925767,-0.122293 1.765668,-0.379382 2.5417,-0.778003 0.341195,-0.175259 0.942023,-0.568381 1.150639,-0.752863 l 0.136709,-0.120893 -5.605032,-5.606976 C 8.2337189,9.6016202 5.704605,7.0785217 5.6962335,7.0785715 5.6878621,7.0786214 5.5669726,7.2324188 5.4275903,7.4203437 4.7111807,8.3862562 4.2640759,9.494702 4.0680851,10.790778 c -0.065181,0.431036 -0.090079,1.53472 -0.044835,1.987446 0.2406062,2.407596 1.546148,4.562332 3.5868762,5.919974 0.4303689,0.286313 1.2614491,0.698786 1.7409864,0.864068 0.6315864,0.217689 1.3326383,0.369549 1.9653433,0.425729 0.425722,0.0378 1.326427,0.01559 1.776015,-0.0438 z m 5.537897,-3.505461 c 0.686116,-1.101759 1.081879,-2.107709 1.286142,-3.269111 0.0819,-0.465656 0.111841,-1.431584 0.06035,-1.946773 C 19.735881,8.811741 18.433266,6.6619006 16.388891,5.3012482 15.724197,4.8588544 14.767203,4.4347242 13.990518,4.2383123 12.090514,3.75783 10.037364,3.9752015 8.3658289,4.8338107 8.0246342,5.0090703 7.4238064,5.4021922 7.2151899,5.5866738 L 7.078481,5.707567 l 5.605063,5.608114 5.605064,5.608114 0.07595,-0.09009 c 0.04177,-0.04955 0.161387,-0.227288 0.265811,-0.394971 z"
+     id="path2" />
+</svg>

BallanceTasEditor/Assets/AppIcons/ClearKeys.svg

@@ -0,0 +1,44 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   viewBox="0 0 24 24"
+   version="1.1"
+   id="svg1"
+   sodipodi:docname="ClearKeys.svg"
+   inkscape:version="1.3.2 (091e20e, 2023-11-25, custom)"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg">
+  <defs
+     id="defs1" />
+  <sodipodi:namedview
+     id="namedview1"
+     pagecolor="#ffffff"
+     bordercolor="#000000"
+     borderopacity="0.25"
+     inkscape:showpageshadow="2"
+     inkscape:pageopacity="0.0"
+     inkscape:pagecheckerboard="0"
+     inkscape:deskcolor="#d1d1d1"
+     inkscape:zoom="32.916667"
+     inkscape:cx="12"
+     inkscape:cy="12"
+     inkscape:window-width="1920"
+     inkscape:window-height="1017"
+     inkscape:window-x="-8"
+     inkscape:window-y="-8"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="svg1" />
+  <path
+     d="m 19.36,2.72 1.42,1.42 -5.72,5.71 c 1.07,1.54 1.22,3.39 0.32,4.59 L 9.06,8.12 c 1.2,-0.9 3.05,-0.75 4.59,0.32 L 19.36,2.72 M 5.93,17.57 C 3.92,15.56 2.69,13.16 2.35,10.92 l 4.88,-2.09 7.44,7.44 -2.09,4.88 C 10.34,20.81 7.94,19.58 5.93,17.57 Z"
+     id="path1"
+     style="display:none" />
+  <path
+     style="fill:#607d8b;stroke-width:0.000911392;fill-opacity:1"
+     d="M 12.136709,21.054947 C 9.849802,20.570498 7.6401138,19.296543 5.8025316,17.403096 4.4028758,15.960889 3.3992023,14.37058 2.7993906,12.644655 2.6463627,12.204326 2.4273042,11.35402 2.3985171,11.088608 L 2.3803943,10.921519 4.7251585,9.9189873 C 6.0147788,9.3675949 7.1043011,8.9044989 7.1463187,8.8898851 c 0.071606,-0.024904 0.3085786,0.2056059 3.7789633,3.6759029 2.036411,2.03636 3.702566,3.714727 3.702566,3.729703 0,0.01498 -0.461067,1.105251 -1.024592,2.422831 l -1.024593,2.395602 -0.09186,-0.0021 c -0.05053,-0.0012 -0.208066,-0.02675 -0.350091,-0.05684 z"
+     id="path2" />
+  <path
+     style="fill:#607d8b;fill-opacity:1;stroke-width:0.000911392"
+     d="M 12.228787,11.256636 9.0890771,8.1168152 9.262956,8.0055861 c 0.537045,-0.3435433 1.29721,-0.5112188 2.003468,-0.4419202 0.416509,0.040868 0.869029,0.1466631 1.241447,0.2902384 0.298885,0.1152267 0.773018,0.3576119 0.98551,0.5038104 0.07023,0.04832 0.138874,0.087855 0.152539,0.087855 0.01366,0 1.306513,-1.281613 2.872996,-2.8480292 l 2.84815,-2.8480293 0.691078,0.6910787 0.691079,0.6910786 -2.855424,2.8555452 C 15.12356,9.75757 15.039674,9.8448024 15.081906,9.911253 c 0.598284,0.941377 0.857172,1.729415 0.860857,2.620393 0.002,0.475353 -0.04848,0.782692 -0.194207,1.183063 -0.08105,0.222676 -0.299494,0.631956 -0.355907,0.666821 -0.01328,0.0082 -1.437021,-1.397993 -3.163862,-3.124894 z"
+     id="path3" />
+</svg>

BallanceTasEditor/Assets/AppIcons/CloseFile.svg

@@ -0,0 +1,44 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   viewBox="0 0 24 24"
+   version="1.1"
+   id="svg1"
+   sodipodi:docname="MenuCloseFile.svg"
+   inkscape:export-filename="MenuCloseFile.png"
+   inkscape:export-xdpi="1024"
+   inkscape:export-ydpi="1024"
+   inkscape:version="1.3.2 (091e20e, 2023-11-25, custom)"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg">
+  <defs
+     id="defs1" />
+  <sodipodi:namedview
+     id="namedview1"
+     pagecolor="#ffffff"
+     bordercolor="#000000"
+     borderopacity="0.25"
+     inkscape:showpageshadow="2"
+     inkscape:pageopacity="0.0"
+     inkscape:pagecheckerboard="0"
+     inkscape:deskcolor="#d1d1d1"
+     showgrid="false"
+     inkscape:zoom="32.916667"
+     inkscape:cx="11.98481"
+     inkscape:cy="12"
+     inkscape:window-width="1920"
+     inkscape:window-height="1017"
+     inkscape:window-x="-8"
+     inkscape:window-y="-8"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="svg1" />
+  <path
+     d="M 19,6.41 17.59,5 12,10.59 6.41,5 5,6.41 10.59,12 5,17.59 6.41,19 12,13.41 17.59,19 19,17.59 13.41,12 Z"
+     id="path1"
+     style="display:none" />
+  <path
+     style="fill:#f44336;fill-opacity:1;stroke-width:0.000911392"
+     d="M 5.7112968,18.273322 5.0281633,17.589682 7.8228805,14.794841 10.617598,12 7.8227956,9.2050739 5.0279935,6.4101481 5.7190708,5.7190708 6.4101481,5.0279935 9.2050739,7.8227956 12,10.617598 14.794926,7.8227956 17.589852,5.0279935 18.280929,5.7190708 18.972006,6.4101481 16.177205,9.2050739 13.382402,12 l 2.794803,2.794926 2.794801,2.794926 -0.691077,0.691077 -0.691077,0.691077 L 14.794926,16.177205 12,13.382402 9.2125966,16.169682 c -1.5330718,1.533004 -2.794325,2.78728 -2.8027848,2.78728 -0.00846,0 -0.3227916,-0.307638 -0.698515,-0.68364 z"
+     id="path2" />
+</svg>

BallanceTasEditor/Assets/AppIcons/CopyFrame.svg

@@ -0,0 +1,48 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   viewBox="0 0 24 24"
+   version="1.1"
+   id="svg1"
+   sodipodi:docname="CtxMenuCopy.svg"
+   inkscape:export-filename="CtxMenuCopy.png"
+   inkscape:export-xdpi="1024"
+   inkscape:export-ydpi="1024"
+   inkscape:version="1.3.2 (091e20e, 2023-11-25, custom)"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg">
+  <defs
+     id="defs1" />
+  <sodipodi:namedview
+     id="namedview1"
+     pagecolor="#ffffff"
+     bordercolor="#000000"
+     borderopacity="0.25"
+     inkscape:showpageshadow="2"
+     inkscape:pageopacity="0.0"
+     inkscape:pagecheckerboard="0"
+     inkscape:deskcolor="#d1d1d1"
+     showgrid="false"
+     inkscape:zoom="32.916667"
+     inkscape:cx="11.98481"
+     inkscape:cy="12"
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BallanceTasEditor/Assets/AppIcons/Count.svg

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BallanceTasEditor/Assets/AppIcons/CutFrame.svg

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BallanceTasEditor/Assets/AppIcons/DeleteFrame.svg

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BallanceTasEditor/Assets/AppIcons/EditorLayout.svg

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BallanceTasEditor/Assets/AppIcons/Exit.svg

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BallanceTasEditor/Assets/AppIcons/FillMode.svg

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BallanceTasEditor/Assets/AppIcons/FlipCell.svg

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BallanceTasEditor/Assets/AppIcons/Fps.svg

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BallanceTasEditor/Assets/AppIcons/Goto.svg

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BallanceTasEditor/Assets/AppIcons/NewFile.svg

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BallanceTasEditor/Assets/AppIcons/NextItem.svg

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BallanceTasEditor/Assets/AppIcons/NextPage.svg

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BallanceTasEditor/Assets/AppIcons/Ok.svg

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BallanceTasEditor/Assets/AppIcons/OpenFile.svg

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BallanceTasEditor/Assets/AppIcons/PasteFrame.svg

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BallanceTasEditor/Assets/AppIcons/Preference.svg

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BallanceTasEditor/Assets/AppIcons/PreviousItem.svg

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BallanceTasEditor/Assets/AppIcons/PreviousPage.svg

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BallanceTasEditor/Assets/AppIcons/Redo.svg

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BallanceTasEditor/Assets/AppIcons/ReportBug.svg

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BallanceTasEditor/Assets/AppIcons/SaveFile.svg

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BallanceTasEditor/Assets/AppIcons/SaveFileAs.svg

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BallanceTasEditor/Assets/AppIcons/SaveFileThenRunGame.svg

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BallanceTasEditor/Assets/AppIcons/SelectMode.svg

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BallanceTasEditor/Assets/AppIcons/SetCell.svg

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BallanceTasEditor/Assets/AppIcons/SetFps.svg

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BallanceTasEditor/Assets/AppIcons/Undo.svg

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+</svg>

BallanceTasEditor/Assets/AppIcons/UnsetCell.svg

@@ -0,0 +1,44 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   viewBox="0 0 24 24"
+   version="1.1"
+   id="svg1"
+   sodipodi:docname="CtxMenuUnset.svg"
+   inkscape:export-filename="CtxMenuUnset.png"
+   inkscape:export-xdpi="1024"
+   inkscape:export-ydpi="1024"
+   inkscape:version="1.3.2 (091e20e, 2023-11-25, custom)"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg">
+  <defs
+     id="defs1" />
+  <sodipodi:namedview
+     id="namedview1"
+     pagecolor="#ffffff"
+     bordercolor="#000000"
+     borderopacity="0.25"
+     inkscape:showpageshadow="2"
+     inkscape:pageopacity="0.0"
+     inkscape:pagecheckerboard="0"
+     inkscape:deskcolor="#d1d1d1"
+     showgrid="false"
+     inkscape:zoom="32.916667"
+     inkscape:cx="11.98481"
+     inkscape:cy="12"
+     inkscape:window-width="1920"
+     inkscape:window-height="1017"
+     inkscape:window-x="-8"
+     inkscape:window-y="-8"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="svg1" />
+  <path
+     d="M 19,3 H 5 C 3.89,3 3,3.89 3,5 v 14 a 2,2 0 0 0 2,2 h 14 a 2,2 0 0 0 2,-2 V 5 C 21,3.89 20.1,3 19,3 m 0,2 V 19 H 5 V 5 Z"
+     id="path1"
+     style="display:none" />
+  <path
+     style="fill:#607d8b;fill-opacity:1;stroke-width:0.000911392"
+     d="M 4.7848101,20.97361 C 4.7513924,20.966909 4.6488608,20.946726 4.556962,20.928757 4.4650633,20.910789 4.2805063,20.843549 4.1468354,20.779336 3.7339925,20.581014 3.4181278,20.264972 3.2211831,19.853165 3.0072916,19.405922 3.0227848,20.020374 3.0227848,11.98481 c 0,-6.9612422 0.0025,-7.2999639 0.055335,-7.4861782 0.1958206,-0.6902103 0.7303018,-1.2246914 1.4205121,-1.4205121 0.1862143,-0.052831 0.524936,-0.055335 7.4861781,-0.055335 8.036914,0 7.421647,-0.015542 7.868355,0.1987625 0.422942,0.2029037 0.721769,0.50177 0.925164,0.9252881 C 20.992765,4.593342 20.977215,3.9793602 20.977215,12 c 0,8.018835 0.01548,7.405941 -0.198398,7.853165 -0.245337,0.512995 -0.69601,0.891601 -1.27502,1.071133 -0.155303,0.04816 -0.678123,0.05215 -7.412658,0.05665 -3.9850631,0.0027 -7.2729112,-6.39e-4 -7.3063289,-0.0073 z M 19.017722,12 V 4.9822785 H 12 4.9822785 V 12 19.017722 H 12 19.017722 Z"
+     id="path2" />
+</svg>

BallanceTasEditor/BallanceTasEditor.slnx

@@ -0,0 +1,4 @@
+<Solution>
+  <Project Path="BallanceTasEditor/BallanceTasEditor.csproj" />
+  <Project Path="BallanceTasEditorTests/BallanceTasEditorTests.csproj" />
+</Solution>

BallanceTasEditor/BallanceTasEditor/App.xaml

@@ -0,0 +1,18 @@
+<Application x:Class="BallanceTasEditor.App"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:local="clr-namespace:BallanceTasEditor"
+             StartupUri="Frontend/Views/MainWindow.xaml">
+    <Application.Resources>
+        <ResourceDictionary>
+            <ResourceDictionary.MergedDictionaries>
+                <ResourceDictionary Source="/Frontend/Styles/AccessoryIconControl.xaml"/>
+                <ResourceDictionary Source="/Frontend/Styles/NoteBanner.xaml"/>
+                <ResourceDictionary Source="/Frontend/Styles/GenericButton.xaml"/>
+                <ResourceDictionary>
+
+                </ResourceDictionary>
+            </ResourceDictionary.MergedDictionaries>
+        </ResourceDictionary>
+    </Application.Resources>
+</Application>

BallanceTasEditor/BallanceTasEditor/App.xaml.cs

@@ -1,9 +1,5 @@
-using System;
-using System.Collections.Generic;
 using System.Configuration;
 using System.Data;
-using System.Linq;
-using System.Threading.Tasks;
 using System.Windows;
 
 namespace BallanceTasEditor {

BallanceTasEditor/BallanceTasEditor/AssemblyInfo.cs

@@ -0,0 +1,10 @@
+using System.Windows;
+
+[assembly: ThemeInfo(
+    ResourceDictionaryLocation.None,            //where theme specific resource dictionaries are located
+                                                //(used if a resource is not found in the page,
+                                                // or application resource dictionaries)
+    ResourceDictionaryLocation.SourceAssembly   //where the generic resource dictionary is located
+                                                //(used if a resource is not found in the page,
+                                                // app, or any theme specific resource dictionaries)
+)]

BallanceTasEditor/BallanceTasEditor/Backend/AppSettings.cs

@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace BallanceTasEditor.Backend {
+
+    public enum EditorLayoutKind {
+        Horizontal, Vertical
+    }
+
+    public class AppSettings {
+
+
+
+        public EditorLayoutKind EditorLayout { get; set; }
+
+    }
+}

BallanceTasEditor/BallanceTasEditor/Backend/ExactSizeEnumerable.cs

@@ -0,0 +1,62 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace BallanceTasEditor.Backend {
+
+    /// <summary>
+    /// 一种提前给定元素个数的的IEnumerable。
+    /// </summary>
+    /// <typeparam name="T"></typeparam>
+    public interface IExactSizeEnumerable<out T> : IEnumerable<T> {
+        /// <summary>
+        /// 该迭代器会返回的元素的个数。
+        /// </summary>
+        /// <remarks>
+        /// 如果迭代器返回的元素个数与该方法给定的个数不同，
+        /// 则是未定义行为。
+        /// </remarks>
+        /// <returns>迭代器会返回的元素的准确个数。大于等于0。</returns>
+        public int GetCount();
+    }
+
+    /// <summary>
+    /// 将普通IEnumerable转变为IExactSizeEnumerable的适配器。
+    /// </summary>
+    /// <typeparam name="T"></typeparam>
+    public sealed class ExactSizeEnumerableAdapter<T> : IExactSizeEnumerable<T> {
+        /// <summary>
+        /// 以迭代器和指定长度构建适配器。
+        /// </summary>
+        /// <remarks>
+        /// 如果迭代器返回的元素个数与该方法给定的个数不同，
+        /// 则是未定义行为。
+        /// </remarks>
+        /// <param name="enumerable">一个迭代器，其最多只能迭代给定次数。</param>
+        /// <param name="count">迭代器会迭代的次数。</param>
+        public ExactSizeEnumerableAdapter(IEnumerable<T> enumerable, int count) {
+            m_Inner = enumerable;
+            m_Count = count;
+        }
+
+        private readonly IEnumerable<T> m_Inner;
+        private readonly int m_Count;
+
+        public IEnumerator<T> GetEnumerator() {
+            return m_Inner.GetEnumerator();
+        }
+
+        IEnumerator IEnumerable.GetEnumerator() {
+            return m_Inner.GetEnumerator();
+        }
+
+        public int GetCount() {
+            return m_Count;
+        }
+
+    }
+
+}

BallanceTasEditor/BallanceTasEditor/Backend/FileWatcher.cs

@@ -0,0 +1,190 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace BallanceTasEditor.Backend {
+    public class FileWatcher : IDisposable {
+        /// <summary>
+        /// Create a file watcher.
+        /// </summary>
+        /// <remarks>
+        /// This new created file watcher is not watching specified file
+        /// unless you explicitly call <see cref="Start"/> method.
+        /// </remarks>
+        /// <param name="filepath">The path to watching file.</param>
+        public FileWatcher(string filepath) {
+            m_FilePath = filepath;
+            m_IsWatching = false;
+            m_EventMutex = new Mutex();
+            m_IsEventProcessing = false;
+            
+            // Get directory and file info
+            string directory = Path.GetDirectoryName(filepath) ?? throw new ArgumentException("Invalid file path", nameof(filepath));
+            string filename = Path.GetFileName(filepath);
+            
+            // Create FileSystemWatcher
+            m_FileSystemWatcher = new FileSystemWatcher(directory, filename) {
+                NotifyFilter = NotifyFilters.LastWrite | NotifyFilters.Size | NotifyFilters.FileName,
+                EnableRaisingEvents = false
+            };
+            m_FileSystemWatcher.Changed += OnFileSystemChanged;
+            m_FileSystemWatcher.Deleted += OnFileSystemDeleted;
+            m_FileSystemWatcher.Renamed += OnFileSystemRenamed;
+        }
+
+        /// <summary>
+        /// The path to watching file.
+        /// </summary>
+        private string m_FilePath;
+        /// <summary>
+        /// Whether the file watcher is watching file.
+        /// </summary>
+        private bool m_IsWatching;
+        /// <summary>
+        /// The FileSystemWatcher instance.
+        /// </summary>
+        private readonly FileSystemWatcher m_FileSystemWatcher;
+        
+        /// <summary>
+        /// Flag to indicate if disposed.
+        /// </summary>
+        private bool m_Disposed = false;
+
+        /// <summary>
+        /// Start watching file.
+        /// </summary>
+        public void Start() {
+            if (m_Disposed) throw new ObjectDisposedException(nameof(FileWatcher));
+            
+            if (m_IsWatching) {
+                throw new InvalidOperationException("File watcher is already watching file.");
+            } else {
+                m_FileSystemWatcher.EnableRaisingEvents = true;
+                m_IsWatching = true;
+            }
+        }
+
+        /// <summary>
+        /// Stop watching file.
+        /// </summary>
+        public void Stop() {
+            if (m_Disposed) throw new ObjectDisposedException(nameof(FileWatcher));
+            
+            if (m_IsWatching) {
+                m_FileSystemWatcher.EnableRaisingEvents = false;
+                m_IsWatching = false;
+            } else {
+                throw new InvalidOperationException("File watcher is not watching file.");
+            }
+        }
+
+        /// <summary>
+        /// Dispose the file watcher and release resources.
+        /// </summary>
+        public void Dispose() {
+            if (!m_Disposed) {
+                // Stop watching.
+                if (m_IsWatching) {
+                    Stop();
+                }
+                // Dispose members
+                m_FileSystemWatcher.Dispose();
+                m_EventMutex.Dispose();
+                m_Disposed = true;
+            }
+        }
+
+        /// <summary>
+        /// The event handler when file is modified.
+        /// </summary>
+        public delegate void FileModifiedHandler();
+        /// <summary>
+        /// The event handler when file is deleted.
+        /// </summary>
+        public delegate void FileDeletedHandler();
+
+        /// <summary>
+        /// The event when file is modified.
+        /// </summary>
+        /// <remarks>
+        /// Before user process this event completely,
+        /// there is no any other event will be triggered.
+        /// </remarks>
+        public event FileModifiedHandler? FileModified;
+        /// <summary>
+        /// The event when file is deleted.
+        /// </summary>
+        /// <remarks>
+        /// Before user process this event completely,
+        /// there is no any other event will be triggered.
+        /// </remarks>
+        public event FileDeletedHandler? FileDeleted;
+
+        private Mutex m_EventMutex;
+        private bool m_IsEventProcessing;
+
+        private void OnFileModified() {
+            if (FileModified is not null) {
+                lock (m_EventMutex) {
+                    if (m_IsEventProcessing) return;
+                    else m_IsEventProcessing = true;
+                }
+                try {
+                    FileModified.Invoke();
+                }
+                finally {
+                    lock (m_EventMutex) {
+                        m_IsEventProcessing = false;
+                    }
+                }
+            }
+
+        }
+
+        private void OnFileDeleted() {
+            if (FileDeleted is not null) {
+                lock (m_EventMutex) {
+                    if (m_IsEventProcessing) return;
+                    else m_IsEventProcessing = true;
+                }
+                try {
+                    FileDeleted.Invoke();
+                }
+                finally {
+                    lock (m_EventMutex) {
+                        m_IsEventProcessing = false;
+                    }
+                }
+            }
+        }
+        
+        /// <summary>
+        /// Handler for FileSystemWatcher Changed event.
+        /// </summary>
+        private void OnFileSystemChanged(object sender, FileSystemEventArgs e) {
+            // Filter out our own change notifications to avoid infinite loops
+            if (e.ChangeType == WatcherChangeTypes.Changed) {
+                OnFileModified();
+            }
+        }
+        
+        /// <summary>
+        /// Handler for FileSystemWatcher Deleted event.
+        /// </summary>
+        private void OnFileSystemDeleted(object sender, FileSystemEventArgs e) {
+            OnFileDeleted();
+        }
+        
+        /// <summary>
+        /// Handler for FileSystemWatcher Renamed event.
+        /// </summary>
+        private void OnFileSystemRenamed(object sender, RenamedEventArgs e) {
+            // Treat rename as a delete since the original file is gone
+            OnFileDeleted();
+        }
+    }
+}

BallanceTasEditor/BallanceTasEditor/Backend/FpsConverter.cs

@@ -0,0 +1,75 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace BallanceTasEditor.Backend {
+    /// <summary>
+    /// FPS converter
+    /// </summary>
+    public static class FpsConverter {
+        /// <summary>
+        /// Check if the FPS is valid
+        /// </summary>
+        /// <param name="fps">FPS in integer</param>
+        /// <returns>Is valid</returns>
+        public static bool IsValidFps(uint fps) {
+            return fps > 0;
+        }
+        /// <summary>
+        /// Check if the FPS is valid
+        /// </summary>
+        /// <param name="fps">FPS in float point</param>
+        /// <returns>Is valid</returns>
+        public static bool IsValidFps(float fps) {
+            return fps > 0;
+        }
+        /// <summary>
+        /// Check if the delta time is valid
+        /// </summary>
+        /// <param name="delta">Delta time in float point</param>
+        /// <returns>Is valid</returns>
+        public static bool IsValidDelta(float delta) {
+            return delta > 0;
+        }
+
+        /// <summary>
+        /// Convert float point delta time to float point FPS
+        /// </summary>
+        /// <param name="delta">Delta time in float point</param>
+        /// <returns>FPS in float point</returns>
+        public static float ToFps(float delta) {
+            ArgumentOutOfRangeException.ThrowIfNegativeOrZero(delta, nameof(delta));
+            return 1f / delta;
+        }
+
+        /// <summary>
+        /// Convert float point delta time to integer FPS
+        /// </summary>
+        /// <param name="delta">Delta time in float point</param>
+        /// <returns>FPS in round integer</returns>
+        public static uint ToRoundFps(float delta) {
+            return Convert.ToUInt32(ToFps(delta));
+        }
+
+        /// <summary>
+        /// Convert integer FPS to float point delta time
+        /// </summary>
+        /// <param name="fps">FPS in integer</param>
+        /// <returns>Delta time in float point</returns>
+        public static float ToDelta(uint fps) {
+            return ToDelta((float)fps);
+        }
+
+        /// <summary>
+        /// Convert float point FPS to float point delta time
+        /// </summary>
+        /// <param name="fps">FPS in float point</param>
+        /// <returns>Delta time in float point</returns>
+        public static float ToDelta(float fps) {
+            ArgumentOutOfRangeException.ThrowIfNegativeOrZero(fps, nameof(fps));
+            return 1f / fps;
+        }
+    }
+}

BallanceTasEditor/BallanceTasEditor/Backend/TasClipboard.cs

@@ -0,0 +1,66 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+
+namespace BallanceTasEditor.Backend {
+    public class TasClipboard {
+        // Reference: https://stackoverflow.com/questions/22272822/copy-binary-data-to-clipboard
+
+        private static readonly string CLIPBOARD_DATA_FORMAT = "BallanceTasEditor.TasFrames";
+
+        public static void SetClipboard(IExactSizeEnumerable<TasFrame> frames) {
+            DataObject data = new DataObject();
+            var rawFrames = frames.Select((f) => f.ToRaw()).ToArray();
+            data.SetData(CLIPBOARD_DATA_FORMAT, rawFrames, false);
+            Clipboard.SetDataObject(data, true);
+        }
+
+        private static RawTasFrame[]? GetClipboardObject() {
+            DataObject? retrievedData = Clipboard.GetDataObject() as DataObject;
+            if (retrievedData is null) return null;
+            if (!retrievedData.GetDataPresent(CLIPBOARD_DATA_FORMAT)) return null;
+
+            RawTasFrame[]? rawFrames = retrievedData.GetData(CLIPBOARD_DATA_FORMAT) as RawTasFrame[];
+            if (rawFrames is null) return null;
+
+            return rawFrames;
+        }
+
+        public static bool HasClipboard() {
+            return GetClipboardObject() is not null;
+        }
+
+        public static IExactSizeEnumerable<TasFrame>? GetClipboard() {
+            var rawFrames = GetClipboardObject();
+            if (rawFrames is null) return null;
+
+            return new EnumerableArray(rawFrames);
+        }
+
+        private sealed class EnumerableArray : IExactSizeEnumerable<TasFrame> {
+            public EnumerableArray(RawTasFrame[] rawFrames) {
+                m_RawFrames = rawFrames;
+            }
+
+            private RawTasFrame[] m_RawFrames;
+
+            public IEnumerator<TasFrame> GetEnumerator() {
+                return m_RawFrames.Select((f) => TasFrame.FromRaw(f)).GetEnumerator();
+            }
+
+            IEnumerator IEnumerable.GetEnumerator() {
+                return GetEnumerator();
+            }
+
+            public int GetCount() {
+                return m_RawFrames.Length;
+            }
+
+        }
+    }
+}

BallanceTasEditor/BallanceTasEditor/Backend/TasFrame.cs

@@ -0,0 +1,297 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Runtime.InteropServices;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace BallanceTasEditor.Backend {
+
+    /// <summary>
+    /// 原始的TAS帧结构，与二进制结构保持一致。
+    /// </summary>
+    [StructLayout(LayoutKind.Sequential)]
+    [Serializable]
+    public struct RawTasFrame {
+        /// <summary>
+        /// 该帧的持续时间（以秒为单位）。
+        /// </summary>
+        public float TimeDelta;
+        /// <summary>
+        /// 该帧的按键组合。
+        /// </summary>
+        public uint KeyFlags;
+    }
+
+    /// <summary>
+    /// 描述TAS文件中的可能的按键。
+    /// </summary>
+    public struct TasKey : IEquatable<TasKey> {
+        private TasKey(int bitPos) {
+            m_BitPos = bitPos;
+        }
+
+        private int m_BitPos;
+
+        public static readonly TasKey KEY_UP = new TasKey(0);
+        public static readonly TasKey KEY_DOWN = new TasKey(1);
+        public static readonly TasKey KEY_LEFT = new TasKey(2);
+        public static readonly TasKey KEY_RIGHT = new TasKey(3);
+        public static readonly TasKey KEY_SHIFT = new TasKey(4);
+        public static readonly TasKey KEY_SPACE = new TasKey(5);
+        public static readonly TasKey KEY_Q = new TasKey(6);
+        public static readonly TasKey KEY_ESC = new TasKey(7);
+        public static readonly TasKey KEY_ENTER = new TasKey(8);
+
+        public const int MIN_KEY_INDEX = 0;
+        public const int MAX_KEY_INDEX = 8;
+
+        public static bool IsValidIndex(int index) {
+            return index >= MIN_KEY_INDEX && index <= MAX_KEY_INDEX;
+        }
+
+        public static TasKey FromIndex(int index) {
+            if (index < MIN_KEY_INDEX || index > MAX_KEY_INDEX) {
+                throw new ArgumentOutOfRangeException(nameof(index));
+            } else {
+                return new TasKey(index);
+            }
+        }
+
+        public int ToIndex() {
+            return m_BitPos;
+        }
+
+        public uint ToBitMaskKey() {
+            return 1u << m_BitPos;
+        }
+
+        public bool Equals(TasKey other) {
+            return m_BitPos == other.m_BitPos;
+        }
+
+        public override bool Equals(object? obj) {
+            if (obj is TasKey other) {
+                return Equals(other);
+            } else {
+                return false;
+            }
+        }
+
+        public override int GetHashCode() {
+            return m_BitPos.GetHashCode();
+        }
+
+        public static bool operator ==(TasKey left, TasKey right) {
+            return left.Equals(right);
+        }
+
+        public static bool operator !=(TasKey left, TasKey right) {
+            return !left.Equals(right);
+        }
+
+        public override string ToString() {
+            return m_BitPos switch {
+                0 => "KeyUp",
+                1 => "KeyDown",
+                2 => "KeyLeft",
+                3 => "KeyRight",
+                4 => "KeyShift",
+                5 => "KeySpace",
+                6 => "KeyQ",
+                7 => "KeyEsc",
+                8 => "KeyEnter",
+                _ => $"KeyUnknown<Pos={m_BitPos}>"
+            };
+        }
+    }
+
+    /// <summary>
+    /// 描述TAS文件中一帧的结构。
+    /// </summary>
+    public class TasFrame : IEquatable<TasFrame> {
+        private TasFrame(float timeDelta, uint keyFlags) {
+            m_TimeDelta = timeDelta;
+            m_KeyFlags = keyFlags;
+        }
+
+        /// <summary>
+        /// 以指定的FPS，无任何按键初始化当前帧。
+        /// </summary>
+        public static TasFrame FromFps(uint fps = 60) {
+            return new TasFrame(FpsConverter.ToDelta(fps), 0);
+        }
+
+        /// <summary>
+        /// 从原始TAS数据初始化。
+        /// </summary>
+        /// <param name="raw">要用来初始化的原始数据。</param>
+        public static TasFrame FromRaw(RawTasFrame raw) {
+            return new TasFrame(raw.TimeDelta, raw.KeyFlags);
+        }
+        
+        /// <summary>
+        /// 将原始TAS数据覆写到自身
+        /// </summary>
+        /// <param name="raw">要写入的原始TAS数据</param>
+        public void FromRawImplace(RawTasFrame raw) {
+            m_TimeDelta = raw.TimeDelta;
+            m_KeyFlags = raw.KeyFlags;
+        }
+
+        /// <summary>
+        /// 转换为原始TAS数据。
+        /// </summary>
+        /// <returns>转换后的原始TAS数据。</returns>
+        public RawTasFrame ToRaw() {
+            return new RawTasFrame() { TimeDelta = m_TimeDelta, KeyFlags = m_KeyFlags };
+        }
+
+        /// <summary>
+        /// 原位转换为原始TAS数据。
+        /// </summary>
+        /// <param name="raw">以引用传递的原始TAS数据。</param>
+        public void ToRawImplace(ref RawTasFrame raw) {
+            raw.TimeDelta = m_TimeDelta;
+            raw.KeyFlags = m_KeyFlags;
+        }
+
+        /// <summary>
+        /// 返回自身的克隆（深拷贝）。
+        /// </summary>
+        /// <returns>自身的克隆。</returns>
+        public TasFrame Clone() {
+            return new TasFrame(m_TimeDelta, m_KeyFlags);
+        }
+
+        /// <summary>
+        /// 该帧的持续时间（以秒为单位）。
+        /// </summary>
+        private float m_TimeDelta;
+        /// <summary>
+        /// 该帧的按键组合。
+        /// </summary>
+        private uint m_KeyFlags;
+
+        /// <summary>
+        /// 获取帧时间Delta。
+        /// </summary>
+        /// <returns>获取到的帧时间Delta。</returns>
+        public float GetTimeDelta() {
+            return m_TimeDelta;
+        }
+
+        /// <summary>
+        /// 设置帧时间Delta。
+        /// </summary>
+        /// <param name="delta">要设置的帧时间Delta。</param>
+        public void SetTimeDelta(float delta) {
+            m_TimeDelta = delta;
+        }
+
+        /// <summary>
+        /// 判断按键是否被按下。
+        /// </summary>
+        /// <param name="key">要检查的按键。</param>
+        /// <returns>true表示被按下，否则为false。</returns>
+        public bool IsKeyPressed(TasKey key) {
+            return (m_KeyFlags & key.ToBitMaskKey()) != 0;
+        }
+
+        /// <summary>
+        /// 设置按键状态。
+        /// </summary>
+        /// <param name="key">要设置的按键。</param>
+        /// <param name="pressed">true表示设置为按下，否则为松开。</param>
+        public void SetKeyPressed(TasKey key, bool pressed = true) {
+            if (pressed) m_KeyFlags |= key.ToBitMaskKey();
+            else m_KeyFlags &= ~key.ToBitMaskKey();
+        }
+
+        /// <summary>
+        /// 反转按键状态。
+        /// </summary>
+        /// <param name="key">要反转的按键。</param>
+        public void FlipKeyPressed(TasKey key) {
+            m_KeyFlags ^= key.ToBitMaskKey();
+        }
+
+        /// <summary>
+        /// 获取或设置Up键的按下状态。
+        /// </summary>
+        public bool KeyUpPressed { get { return IsKeyPressed(TasKey.KEY_UP); } set { SetKeyPressed(TasKey.KEY_UP, value); } }
+        /// <summary>
+        /// 获取或设置Down键的按下状态。
+        /// </summary>
+        public bool KeyDownPressed { get { return IsKeyPressed(TasKey.KEY_DOWN); } set { SetKeyPressed(TasKey.KEY_DOWN, value); } }
+        /// <summary>
+        /// 获取或设置Left键的按下状态。
+        /// </summary>
+        public bool KeyLeftPressed { get { return IsKeyPressed(TasKey.KEY_LEFT); } set { SetKeyPressed(TasKey.KEY_LEFT, value); } }
+        /// <summary>
+        /// 获取或设置Right键的按下状态。
+        /// </summary>
+        public bool KeyRightPressed { get { return IsKeyPressed(TasKey.KEY_RIGHT); } set { SetKeyPressed(TasKey.KEY_RIGHT, value); } }
+        /// <summary>
+        /// 获取或设置Shift键的按下状态。
+        /// </summary>
+        public bool KeyShiftPressed { get { return IsKeyPressed(TasKey.KEY_SHIFT); } set { SetKeyPressed(TasKey.KEY_SHIFT, value); } }
+        /// <summary>
+        /// 获取或设置Space键的按下状态。
+        /// </summary>
+        public bool KeySpacePressed { get { return IsKeyPressed(TasKey.KEY_SPACE); } set { SetKeyPressed(TasKey.KEY_SPACE, value); } }
+        /// <summary>
+        /// 获取或设置Q键的按下状态。
+        /// </summary>
+        public bool KeyQPressed { get { return IsKeyPressed(TasKey.KEY_Q); } set { SetKeyPressed(TasKey.KEY_Q, value); } }
+        /// <summary>
+        /// 获取或设置Esc键的按下状态。
+        /// </summary>
+        public bool KeyEscPressed { get { return IsKeyPressed(TasKey.KEY_ESC); } set { SetKeyPressed(TasKey.KEY_ESC, value); } }
+        /// <summary>
+        /// 获取或设置回车键的按下状态。
+        /// </summary>
+        public bool KeyEnterPressed { get { return IsKeyPressed(TasKey.KEY_ENTER); } set { SetKeyPressed(TasKey.KEY_ENTER, value); } }
+
+        /// <summary>
+        /// 清除所有按键，将所有按键设置为不按下。
+        /// </summary>
+        public void ClearKeyPressed() {
+            m_KeyFlags = 0;
+        }
+
+        /// <summary>
+        /// 指示当前对象是否等于另一个 TasFrame 对象。
+        /// </summary>
+        /// <param name="other">要比较的 TasFrame 对象。</param>
+        /// <returns>如果两个对象相等则为 true，否则为 false。</returns>
+        public bool Equals(TasFrame? other) {
+            return other is not null &&
+                   m_TimeDelta == other.m_TimeDelta &&
+                   m_KeyFlags == other.m_KeyFlags;
+        }
+
+        /// <summary>
+        /// 指示当前对象是否等于另一个对象。
+        /// </summary>
+        /// <param name="obj">要比较的对象。</param>
+        /// <returns>如果两个对象相等则为 true，否则为 false。</returns>
+        public override bool Equals(object? obj) {
+            if (obj is TasFrame other) {
+                return Equals(other);
+            } else {
+                return false;
+            }
+        }
+
+        /// <summary>
+        /// 返回此实例的哈希代码。
+        /// </summary>
+        /// <returns>32 位有符号整数哈希代码。</returns>
+        public override int GetHashCode() {
+            return HashCode.Combine(m_TimeDelta, m_KeyFlags);
+        }
+
+    }
+
+}

BallanceTasEditor/BallanceTasEditor/Backend/TasOperation.cs

@@ -0,0 +1,532 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Diagnostics.CodeAnalysis;
+using System.Linq;
+using System.Reflection;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace BallanceTasEditor.Backend {
+
+    /// <summary>
+    /// TAS操作接口。所有TAS操作均需要支持此接口。
+    /// </summary>
+    public interface ITasOperation {
+        /// <summary>
+        /// 执行对应的TAS操作。
+        /// </summary>
+        /// <param name="seq">所要操作的TAS存储容器。</param>
+        void Execute(ITasSequence seq);
+        /// <summary>
+        /// 检查该操作是否已经被执行过。
+        /// </summary>
+        /// <remarks>
+        /// 所有Tas操作类创建后只能执行一次或者不执行，
+        /// 因此有此函数用于获取是否已经执行过。
+        /// </remarks>
+        /// <returns>如果已经执行过，返回true，否则返回false。</returns>
+        bool IsExecuted();
+    }
+
+    /// <summary>
+    /// 可撤销的TAS操作接口，所有可撤销的TAS操作均需支持此接口。
+    /// </summary>
+    public interface ITasRevocableOperation : ITasOperation {
+        /// <summary>
+        /// 撤销对应TAS操作。
+        /// </summary>
+        /// <param name="seq">所要撤销操作的TAS存储容器。</param>
+        void Revoke(ITasSequence seq);
+        /// <summary>
+        /// 返回该TAS操作占用的内存大小。
+        /// </summary>
+        /// <remarks>
+        /// 可撤销的TAS操作会在内存中存储一定数据，用于撤销对应操作。
+        /// 该函数返回的占用用于衡量该操作的开销。
+        /// 我们应当基于大小，而非写死的个数决定撤销栈中的最大操作次数，
+        /// 例如对于小型操作我们可以存储100个，对于大型操作则只能存储5个等。
+        /// 用于解决编辑者目前认为撤销栈大小不足的情况。
+        /// <para/>
+        /// 该函数返回的大小可以不是特别精确，但要准确反映空间复杂度。
+        /// </remarks>
+        /// <returns>占用的内存大小（以byte为单位）。</returns>
+        int Occupation();
+    }
+
+    internal static class OperationUtils {
+        internal const int SIZEOF_DELTA_TIME = sizeof(float);
+        internal const int SIZEOF_KEYS = sizeof(uint);
+        internal const int SIZEOF_FRAME = SIZEOF_DELTA_TIME + SIZEOF_KEYS;
+
+        internal static readonly InvalidOperationException ExecutionEnvironment = new InvalidOperationException("Can not execute one TAS operation multiple times.");
+        internal static readonly InvalidOperationException RevokeEnvironment = new InvalidOperationException("Can not revoke an not executed TAS operation.");
+    }
+
+    public enum CellKeysOperationKind {
+        Set, Unset, Flip
+    }
+
+    public class CellKeysOperation : ITasRevocableOperation {
+        public static CellKeysOperation FromSingleCell(CellKeysOperationKind kind, int index, TasKey key) {
+            return new CellKeysOperation(kind, index, index, key, key);
+        }
+
+        public static CellKeysOperation FromCellRange(CellKeysOperationKind kind, int startIndex, int endIndex, TasKey startKey, TasKey endKey) {
+            return new CellKeysOperation(kind, startIndex, endIndex, startKey, endKey);
+        }
+
+        private CellKeysOperation(CellKeysOperationKind kind, int startIndex, int endIndex, TasKey startKey, TasKey endKey) {
+            // Check arguments.
+            ArgumentOutOfRangeException.ThrowIfGreaterThan(startIndex, endIndex);
+            ArgumentOutOfRangeException.ThrowIfGreaterThan(startKey.ToIndex(), endKey.ToIndex());
+            // Setup members.
+            m_Kind = kind;
+            m_StartIndex = startIndex;
+            m_EndIndex = endIndex;
+            m_StartKey = startKey;
+            m_EndKey = endKey;
+            m_FramesBackup = null;
+        }
+
+        private CellKeysOperationKind m_Kind;
+        private int m_StartIndex, m_EndIndex;
+        private TasKey m_StartKey, m_EndKey;
+        private RawTasFrame[]? m_FramesBackup;
+
+        [MemberNotNullWhen(true, nameof(m_FramesBackup))]
+        public bool IsExecuted() {
+            return m_FramesBackup is not null;
+        }
+
+        public void Execute(ITasSequence seq) {
+            if (IsExecuted()) {
+                throw OperationUtils.ExecutionEnvironment;
+            }
+
+            // Check index range.
+            ArgumentOutOfRangeException.ThrowIfGreaterThanOrEqual(m_EndIndex, seq.GetCount());
+            ArgumentOutOfRangeException.ThrowIfLessThan(m_StartIndex, 0);
+
+            // Do backup and set values at the same time
+            int backupIndex = 0;
+            var backups = new RawTasFrame[m_EndIndex - m_StartIndex + 1];
+            // Pre-build key list for fast fetching.
+            var keys = Enumerable.Range(m_StartKey.ToIndex(), m_EndKey.ToIndex() - m_StartKey.ToIndex() + 1).Select((i) => TasKey.FromIndex(i)).ToArray();
+            foreach (var frame in seq.BatchlyVisit(m_StartIndex, m_EndIndex)) {
+                // Do backup
+                frame.ToRawImplace(ref backups[backupIndex++]);
+                // Modify keys
+                foreach (var key in keys) {
+                    switch (m_Kind) {
+                        case CellKeysOperationKind.Set:
+                            frame.SetKeyPressed(key, true);
+                            break;
+                        case CellKeysOperationKind.Unset:
+                            frame.SetKeyPressed(key, false);
+                            break;
+                        case CellKeysOperationKind.Flip:
+                            frame.FlipKeyPressed(key);
+                            break;
+                    }
+                }
+            }
+
+            // Assign backups
+            m_FramesBackup = backups;
+        }
+
+        public void Revoke(ITasSequence seq) {
+            if (!IsExecuted()) {
+                throw OperationUtils.RevokeEnvironment;
+            }
+
+            // Index range is checked,
+            // so we directly restore backup.
+            int backupIndex = 0;
+            foreach (var frame in seq.BatchlyVisit(m_StartIndex, m_EndIndex)) {
+                frame.FromRawImplace(m_FramesBackup[backupIndex++]);
+            }
+
+            // Clear backups
+            m_FramesBackup = null;
+        }
+
+        public int Occupation() {
+            return (m_EndIndex - m_StartIndex) * OperationUtils.SIZEOF_FRAME;
+        }
+
+    }
+
+    public class FrameFpsOperation : ITasRevocableOperation {
+        public static FrameFpsOperation FromSingleFrame(int index, uint fps) {
+            return new FrameFpsOperation(index, index, fps);
+        }
+
+        public static FrameFpsOperation FromFrameRange(int startIndex, int endIndex, uint fps) {
+            return new FrameFpsOperation(startIndex, endIndex, fps);
+        }
+
+        private FrameFpsOperation(int startIndex, int endIndex, uint fps) {
+            // Check arguments
+            if (!FpsConverter.IsValidFps(fps)) {
+                throw new ArgumentOutOfRangeException(nameof(fps));
+            }
+            ArgumentOutOfRangeException.ThrowIfGreaterThan(startIndex, endIndex);
+            // Assign arguments
+            m_StartIndex = startIndex;
+            m_EndIndex = endIndex;
+            m_DeltaTime = FpsConverter.ToDelta(fps);
+        }
+
+        private int m_StartIndex, m_EndIndex;
+        private float m_DeltaTime;
+        private float[]? m_DeltaTimesBackup;
+
+        [MemberNotNullWhen(true, nameof(m_DeltaTimesBackup))]
+        public bool IsExecuted() {
+            return m_DeltaTimesBackup is not null;
+        }
+
+        public void Execute(ITasSequence seq) {
+            if (IsExecuted()) {
+                throw OperationUtils.ExecutionEnvironment;
+            }
+
+            // Check index range
+            ArgumentOutOfRangeException.ThrowIfGreaterThanOrEqual(m_EndIndex, seq.GetCount());
+            ArgumentOutOfRangeException.ThrowIfLessThan(m_StartIndex, 0);
+
+            // Do backup and set values at the same time
+            int backupIndex = 0;
+            var backups = new float[m_EndIndex - m_StartIndex + 1];
+            foreach (var frame in seq.BatchlyVisit(m_StartIndex, m_EndIndex)) {
+                // Do backup
+                backups[backupIndex++] = frame.GetTimeDelta();
+                // Modify delta time
+                frame.SetTimeDelta(m_DeltaTime);
+            }
+
+            // Assign backups
+            m_DeltaTimesBackup = backups;
+        }
+
+        public void Revoke(ITasSequence seq) {
+            if (!IsExecuted()) {
+                throw OperationUtils.RevokeEnvironment;
+            }
+
+            // Index range is checked,
+            // so we directly restore backup.
+            int backupIndex = 0;
+            foreach (var frame in seq.BatchlyVisit(m_StartIndex, m_EndIndex)) {
+                frame.SetTimeDelta(m_DeltaTimesBackup[backupIndex++]);
+            }
+
+            // Clear backups
+            m_DeltaTimesBackup = null;
+        }
+
+        public int Occupation() {
+            return (m_EndIndex - m_StartIndex) * OperationUtils.SIZEOF_DELTA_TIME;
+        }
+
+    }
+
+    public class RemoveFrameOperation : ITasRevocableOperation {
+        public RemoveFrameOperation(int startIndex, int endIndex) {
+            // Check arguments
+            ArgumentOutOfRangeException.ThrowIfGreaterThan(startIndex, endIndex);
+            // Assign arguments
+            m_StartIndex = startIndex;
+            m_EndIndex = endIndex;
+        }
+
+        private int m_StartIndex, m_EndIndex;
+        private RawTasFrame[]? m_FramesBackup;
+
+        [MemberNotNullWhen(true, nameof(m_FramesBackup))]
+        public bool IsExecuted() {
+            return m_FramesBackup is not null;
+        }
+
+        public void Execute(ITasSequence seq) {
+            if (IsExecuted()) {
+                throw OperationUtils.ExecutionEnvironment;
+            }
+
+            // Check index range
+            ArgumentOutOfRangeException.ThrowIfGreaterThanOrEqual(m_EndIndex, seq.GetCount());
+            ArgumentOutOfRangeException.ThrowIfLessThan(m_StartIndex, 0);
+
+            // Do backups
+            int backupIndex = 0;
+            var backups = new RawTasFrame[m_EndIndex - m_StartIndex + 1];
+            foreach (var frame in seq.BatchlyVisit(m_StartIndex, m_EndIndex)) {
+                frame.ToRawImplace(ref backups[backupIndex++]);
+            }
+            // Do remove
+            seq.Remove(m_StartIndex, m_EndIndex);
+
+            // Assign backups
+            m_FramesBackup = backups;
+        }
+
+        public void Revoke(ITasSequence seq) {
+            if (!IsExecuted()) {
+                throw OperationUtils.RevokeEnvironment;
+            }
+
+            // Index range is checked,
+            // so we directly restore backup.
+            // Build iterator first
+            var iter = m_FramesBackup.Select((frame) => TasFrame.FromRaw(frame));
+            var exactSizedIter = new ExactSizeEnumerableAdapter<TasFrame>(iter, m_EndIndex - m_StartIndex + 1);
+            // Insert at start index
+            seq.Insert(m_StartIndex, exactSizedIter);
+
+            // Clear backups
+            m_FramesBackup = null;
+        }
+
+        public int Occupation() {
+            return (m_EndIndex - m_StartIndex) * OperationUtils.SIZEOF_FRAME;
+        }
+    }
+
+    public enum AddFrameOperationKind {
+        Before, After
+    }
+
+    public class AddFrameOperation : ITasRevocableOperation {
+        public AddFrameOperation(AddFrameOperationKind kind, int index, uint fps, int count) {
+            // Check argument
+            if (!FpsConverter.IsValidFps(fps)) {
+                throw new ArgumentOutOfRangeException(nameof(fps));
+            }
+            ArgumentOutOfRangeException.ThrowIfNegative(count);
+            // Assign argument
+            m_Kind = kind;
+            m_Index = index;
+            m_Fps = fps;
+            m_Count = count;
+            m_IsExecuted = false;
+        }
+
+        private AddFrameOperationKind m_Kind;
+        private int m_Index;
+        private uint m_Fps;
+        private int m_Count;
+        private bool m_IsExecuted;
+
+        public bool IsExecuted() {
+            return m_IsExecuted;
+        }
+
+        public void Execute(ITasSequence seq) {
+            if (IsExecuted()) {
+                throw OperationUtils.ExecutionEnvironment;
+            }
+
+            // Check arguments
+            // If we add before some frame, the valid index can be [0, count],
+            // however, if we add after some frame, the valid index is [0, count),
+            switch (m_Kind) {
+                case AddFrameOperationKind.Before:
+                    ArgumentOutOfRangeException.ThrowIfGreaterThan(m_Index, seq.GetCount());
+                    break;
+                case AddFrameOperationKind.After:
+                    ArgumentOutOfRangeException.ThrowIfGreaterThanOrEqual(m_Index, seq.GetCount());
+                    break;
+                default:
+                    throw new UnreachableException("Unknown AddFrameOperationKind");
+            }
+
+            // Skip if count is zero.
+            if (m_Count != 0) {
+                // Prepare data builder.
+                var iter = Enumerable.Range(0, m_Count).Select((_) => TasFrame.FromFps(m_Fps));
+                var exactSizedIter = new ExactSizeEnumerableAdapter<TasFrame>(iter, m_Count);
+                // Compute the insert index
+                var index = m_Kind switch {
+                    AddFrameOperationKind.Before => m_Index,
+                    AddFrameOperationKind.After => m_Index + 1,
+                    _ => throw new UnreachableException("Unknown AddFrameOperationKind"),
+                };
+                seq.Insert(index, exactSizedIter);
+            }
+
+            // Set status
+            m_IsExecuted = true;
+        }
+
+        public void Revoke(ITasSequence seq) {
+            if (!IsExecuted()) {
+                throw OperationUtils.RevokeEnvironment;
+            }
+
+            // Arguments were checked so we directly resotre them.
+            // If we inserted count is not zero, remove inserted frames, otherwise do nothing.
+            if (m_Count != 0) {
+                // Compute the index for removing
+                var index = m_Kind switch {
+                    AddFrameOperationKind.Before => m_Index,
+                    AddFrameOperationKind.After => m_Index + 1,
+                    _ => throw new UnreachableException("Unknown AddFrameOperationKind"),
+                };
+                // Execute removing.
+                seq.Remove(index, index + m_Count - 1);
+            }
+
+            // Modify execution status
+            m_IsExecuted = false;
+        }
+
+        public int Occupation() {
+            return OperationUtils.SIZEOF_FRAME;
+        }
+    }
+
+    public enum InsertFrameOperationKind {
+        Before, After
+    }
+
+    public class InsertFrameOperation : ITasRevocableOperation {
+        public InsertFrameOperation(InsertFrameOperationKind kind, int index, IExactSizeEnumerable<TasFrame> frames) {
+            m_Kind = kind;
+            m_Index = index;
+            m_InsertedFrames = frames.Select((frame) => frame.ToRaw()).ToArray();
+            m_IsExecuted = false;
+        }
+
+        private InsertFrameOperationKind m_Kind;
+        private int m_Index;
+        private RawTasFrame[] m_InsertedFrames;
+        private bool m_IsExecuted;
+
+        public bool IsExecuted() {
+            return m_IsExecuted;
+        }
+
+        public void Execute(ITasSequence seq) {
+            if (IsExecuted()) {
+                throw OperationUtils.ExecutionEnvironment;
+            }
+
+            // Check arguments
+            // If we insert before some frame, the valid index can be [0, count],
+            // however, if we insert after some frame, the valid index is [0, count),
+            switch (m_Kind) {
+                case InsertFrameOperationKind.Before:
+                    ArgumentOutOfRangeException.ThrowIfGreaterThan(m_Index, seq.GetCount());
+                    break;
+                case InsertFrameOperationKind.After:
+                    ArgumentOutOfRangeException.ThrowIfGreaterThanOrEqual(m_Index, seq.GetCount());
+                    break;
+                default:
+                    throw new UnreachableException("Unknown InsertFrameOperationKind");
+            }
+
+            // Skip if count is zero
+            var count = m_InsertedFrames.Length;
+            if (count != 0) {
+                // Prepare iterator
+                var iter = m_InsertedFrames.Select((frame) => TasFrame.FromRaw(frame));
+                var exactSizedIter = new ExactSizeEnumerableAdapter<TasFrame>(iter, count);
+                // Compute the insert index
+                var index = m_Kind switch {
+                    InsertFrameOperationKind.Before => m_Index,
+                    InsertFrameOperationKind.After => m_Index + 1,
+                    _ => throw new UnreachableException("Unknown InsertFrameOperationKind"),
+                };
+                // Execute inserting.
+                seq.Insert(index, exactSizedIter);
+            }
+
+            // Set execution status
+            m_IsExecuted = true;
+        }
+
+        public void Revoke(ITasSequence seq) {
+            if (!IsExecuted()) {
+                throw OperationUtils.RevokeEnvironment;
+            }
+
+            // Arguments were checked so we directly restore them.
+            var count = m_InsertedFrames.Length;
+            if (count != 0) {
+                // Compute the index for removing
+                var index = m_Kind switch {
+                    InsertFrameOperationKind.Before => m_Index,
+                    InsertFrameOperationKind.After => m_Index + 1,
+                    _ => throw new UnreachableException("Unknown InsertFrameOperationKind"),
+                };
+                // Execute removing.
+                seq.Remove(index, index + count - 1);
+            }
+
+            // Modify execution status
+            m_IsExecuted = false;
+        }
+
+        public int Occupation() {
+            return m_InsertedFrames.Length * OperationUtils.SIZEOF_FRAME;
+        }
+    }
+
+    public class ClearKeysOperation : ITasOperation {
+        public ClearKeysOperation() {
+            m_IsExecuted = false;
+        }
+
+        private bool m_IsExecuted;
+
+        public void Execute(ITasSequence seq) {
+            // Check execution status first.
+            if (IsExecuted()) {
+                throw OperationUtils.ExecutionEnvironment;
+            }
+            // Execute operation
+            foreach (var frame in seq) {
+                frame.ClearKeyPressed();
+            }
+            m_IsExecuted = true;
+        }
+
+        public bool IsExecuted() {
+            return m_IsExecuted;
+        }
+    }
+
+    public class UniformFpsOperation : ITasOperation {
+        public UniformFpsOperation(uint fps) {
+            // Check arguments
+            if (!FpsConverter.IsValidFps(fps)) {
+                throw new ArgumentOutOfRangeException(nameof(fps));
+            }
+            // Assign arguments
+            m_DeltaTime = FpsConverter.ToDelta(fps);
+            m_IsExecuted = false;
+        }
+
+        private float m_DeltaTime;
+        private bool m_IsExecuted;
+
+        public void Execute(ITasSequence seq) {
+            // Check execution status first.
+            if (IsExecuted()) {
+                throw OperationUtils.ExecutionEnvironment;
+            }
+            // Execute operation
+            foreach (var frame in seq) {
+                frame.SetTimeDelta(m_DeltaTime);
+            }
+            m_IsExecuted = true;
+        }
+
+        public bool IsExecuted() {
+            return m_IsExecuted;
+        }
+    }
+
+}

BallanceTasEditor/BallanceTasEditor/Backend/TasSequence.cs

@@ -0,0 +1,425 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Diagnostics.CodeAnalysis;
+using System.Linq;
+using System.Reflection;
+using System.Text;
+using System.Text.RegularExpressions;
+using System.Threading.Tasks;
+
+namespace BallanceTasEditor.Backend {
+
+    /// <summary>
+    /// 所有用于在内存中存储TAS帧的结构都必须实现此interface。
+    /// </summary>
+    public interface ITasSequence : IEnumerable<TasFrame> {
+        /// <summary>
+        /// 访问给定索引的帧的值。
+        /// </summary>
+        /// <remarks>
+        /// 实现此函数时需要格外注意以下事项：
+        /// <para/>
+        /// 该函数应当保证在访问临近项时有较高的效率。
+        /// <para/>
+        /// 该函数理论上的复杂度应为O(1)。
+        /// </remarks>
+        /// <param name="index">要访问的单元的索引。</param>
+        /// <returns>被访问的单元。</returns>
+        /// <exception cref="IndexOutOfRangeException">给定的索引无效。</exception>
+        TasFrame Visit(int index);
+        /// <summary>
+        /// 按顺序访问给定索引区间内的帧的值。
+        /// </summary>
+        /// <remarks>
+        /// 实现此函数时需要格外注意以下事项：
+        /// <para/>
+        /// 该函数如果可以进行顺序访问优化，则应当优化。
+        /// 即使用此函数可以获得等于或大于单独一次使用<see cref="Visit(int)"/>函数。
+        /// <para/>
+        /// 该函数理论上的复杂度应为O(1)。
+        /// </remarks>
+        /// <param name="startIndex">要访问的帧区间的起始索引（包含）。</param>
+        /// <param name="endIndex">要访问的帧区间的终止索引（包含）</param>
+        /// <exception cref="IndexOutOfRangeException">给定的索引无效。</exception>
+        IExactSizeEnumerable<TasFrame> BatchlyVisit(int startIndex, int endIndex);
+        /// <summary>
+        /// 在给定的帧索引<b>之前</b>插入给定的项目。
+        /// </summary>
+        /// <remarks>
+        /// 实现此函数时需要格外注意以下事项：
+        /// <para/>
+        /// 按照函数约定，如果要在头部插入数据，则可以通过指定0来实现。
+        /// 然而对于在尾部插入数据，或在空的存储中插入数据，可以指定存储结构的长度来实现。
+        /// 即指定<c>(最大Index + 1)</c>作为参数来实现。
+        /// <para/>
+        /// 该函数理论上的复杂度应为O(1)。
+        /// </remarks>
+        /// <param name="index">要在前方插入数据的元素的索引。</param>
+        /// <param name="items">要插入的元素的迭代器。</param>
+        /// <exception cref="IndexOutOfRangeException">给定的索引无效。</exception>
+        void Insert(int index, IExactSizeEnumerable<TasFrame> items);
+        /// <summary>
+        /// 从序列中移出给定帧区间的元素。
+        /// </summary>
+        /// <remarks>
+        /// 实现此函数时需要格外注意以下事项：
+        /// <para/>
+        /// 该函数理论上的复杂度应为O(1)。
+        /// </remarks>
+        /// <param name="startIndex">要移除的帧区间的起始索引（包含）。</param>
+        /// <param name="endIndex">要移除的帧区间的终止索引（包含）</param>
+        /// <exception cref="IndexOutOfRangeException">给定的索引无效。</exception>
+        void Remove(int startIndex, int endIndex);
+
+        /// <summary>
+        /// 清空存储结构。
+        /// </summary>
+        void Clear();
+        /// <summary>
+        /// 获取当前存储的TAS帧的个数。
+        /// </summary>
+        /// <returns>存储的TAS帧的个数。</returns>
+        int GetCount();
+        /// <summary>
+        /// 获取当前存储结构是不是空的。
+        /// </summary>
+        /// <returns>如果是空的就返回true，否则返回false。</returns>
+        bool IsEmpty();
+    }
+
+    // TODO:
+    // We may introduce ITasSequenceSlice to have iterator on a specific range.
+    // We also need introduce a new function in ITasSequence to fetch this instance.
+
+    /// <summary>
+    /// 基于Gap Buffer思想的TAS存储器。
+    /// </summary>
+    /// <remarks>
+    /// 其实就是把List的InsertRange的复杂度从O(n*m)修正为O(n)。
+    /// </remarks>
+    public class GapBufferSequence : ITasSequence, IEnumerable<TasFrame> {
+        public GapBufferSequence() {
+            // Do nothing.
+        }
+
+        public TasFrame Visit(int index) {
+            throw new NotImplementedException();
+        }
+
+        public IExactSizeEnumerable<TasFrame> BatchlyVisit(int startIndex, int endIndex) {
+            throw new NotImplementedException();
+        }
+
+        public void Insert(int index, IExactSizeEnumerable<TasFrame> items) {
+            throw new NotImplementedException();
+        }
+
+        public void Remove(int startIndex, int endIndex) {
+            throw new NotImplementedException();
+        }
+
+        public void Clear() {
+            throw new NotImplementedException();
+        }
+
+        public int GetCount() {
+            throw new NotImplementedException();
+        }
+
+        public bool IsEmpty() {
+            throw new NotImplementedException();
+        }
+
+        public IEnumerator<TasFrame> GetEnumerator() {
+            throw new NotImplementedException();
+        }
+
+        IEnumerator IEnumerable.GetEnumerator() {
+            return GetEnumerator();
+        }
+
+    }
+
+    /// <summary>
+    /// 基于简单的List的TAS存储器。
+    /// </summary>
+    /// <remarks>
+    /// 由于List的InsertRange的复杂度是O(n*m)，可能不符合要求。
+    /// </remarks>
+    public class ListTasSequence : ITasSequence, IEnumerable<TasFrame> {
+        public ListTasSequence() {
+            m_Container = new List<TasFrame>();
+        }
+
+        private List<TasFrame> m_Container;
+
+        public TasFrame Visit(int index) {
+            if (index >= m_Container.Count || index < 0) {
+                throw new IndexOutOfRangeException("Invalid index for frame.");
+            } else {
+                return m_Container[index];
+            }
+        }
+
+        private IEnumerable<TasFrame> BatchlyVisitEx(int startIndex, int endIndex) {
+            if (endIndex < startIndex || startIndex < 0 || endIndex >= m_Container.Count) {
+                throw new IndexOutOfRangeException("Invalid index for frame.");
+            }
+
+            // Iterate items one by one.
+            for (int i = startIndex; i <= endIndex; ++i) {
+                yield return m_Container[i];
+            }
+        }
+
+        public IExactSizeEnumerable<TasFrame> BatchlyVisit(int startIndex, int endIndex) {
+            return new ExactSizeEnumerableAdapter<TasFrame>(BatchlyVisitEx(startIndex, endIndex), endIndex - startIndex + 1);
+        }
+
+        public void Insert(int index, IExactSizeEnumerable<TasFrame> items) {
+            if (index == m_Container.Count) {
+                m_Container.AddRange(items);
+            } else {
+                if (index > m_Container.Count || index < 0) {
+                    throw new IndexOutOfRangeException("Invalid index for frame.");
+                } else {
+                    m_Container.InsertRange(index, items);
+                }
+            }
+        }
+
+        public void Remove(int startIndex, int endIndex) {
+            if (endIndex < startIndex || startIndex < 0 || endIndex >= m_Container.Count) {
+                throw new IndexOutOfRangeException("Invalid index for frame.");
+            } else {
+                m_Container.RemoveRange(startIndex, endIndex - startIndex + 1);
+            }
+        }
+
+        public void Clear() {
+            m_Container.Clear();
+        }
+
+        public int GetCount() {
+            return m_Container.Count;
+        }
+
+        public bool IsEmpty() {
+            return GetCount() == 0;
+        }
+
+        public IEnumerator<TasFrame> GetEnumerator() {
+            return m_Container.GetEnumerator();
+        }
+
+        IEnumerator IEnumerable.GetEnumerator() {
+            return GetEnumerator();
+        }
+    }
+
+    /// <summary>
+    /// 传统的基于LinkedList的TAS存储器。
+    /// </summary>
+    public class LegacyTasSequence : ITasSequence, IEnumerable<TasFrame> {
+        public LegacyTasSequence() {
+            m_Container = new LinkedList<TasFrame>();
+            m_Cursor = null;
+        }
+
+        private class LinkedListCursor<T> {
+            public LinkedListCursor(LinkedListNode<T> node, int index) {
+                this.Node = node;
+                this.Index = index;
+            }
+
+            public LinkedListNode<T> Node;
+            public int Index;
+        }
+
+        private LinkedList<TasFrame> m_Container;
+        private LinkedListCursor<TasFrame>? m_Cursor;
+
+        private enum NodeSeekOrigin {
+            Head,
+            Cursor,
+            Tail,
+        }
+
+        private struct NodeSeekInfo : IComparable<NodeSeekInfo> {
+            public required NodeSeekOrigin Origin;
+            public required int Offset;
+
+            public int CompareTo(NodeSeekInfo other) {
+                return Math.Abs(this.Offset).CompareTo(Math.Abs(other.Offset));
+            }
+        }
+
+        /// <summary>
+        /// 快速将内部游标移动到指定Index，并更新与之匹配的Index。
+        /// </summary>
+        /// <param name="desiredIndex"></param>
+        /// <exception cref="Exception"></exception>
+        [MemberNotNull(nameof(m_Cursor))]
+        private void MoveToIndex(int desiredIndex) {
+            // 检查基本环境
+            if (desiredIndex < 0 || desiredIndex >= GetCount())
+                throw new IndexOutOfRangeException("Invalid index for frame.");
+            if (m_Cursor is null || IsEmpty())
+                throw new InvalidOperationException("Can not move cursor when container is empty.");
+
+            // 创建三个候选方案。
+            var candidates = new NodeSeekInfo[3] {
+                new NodeSeekInfo() { Origin = NodeSeekOrigin.Head, Offset = desiredIndex },
+                new NodeSeekInfo() { Origin = NodeSeekOrigin.Tail, Offset = desiredIndex - (GetCount() - 1) },
+                new NodeSeekInfo() { Origin = NodeSeekOrigin.Cursor, Offset = desiredIndex - m_Cursor.Index },
+            };
+            // 确定哪个候选方案最短。
+            var bestCandidate = candidates.Min();
+            // 用最短候选方案移动。
+            int pickedOffset = bestCandidate.Offset;
+            LinkedListNode<TasFrame> pickedNode = bestCandidate.Origin switch {
+                NodeSeekOrigin.Head => m_Container.First.Unwrap(),
+                NodeSeekOrigin.Cursor => m_Cursor.Node,
+                NodeSeekOrigin.Tail => m_Container.Last.Unwrap(),
+                _ => throw new UnreachableException("Unknown NodeSeekOrigin"),
+            };
+            int alreadyMoved = 0;
+            if (pickedOffset < 0) {
+                while (alreadyMoved != pickedOffset) {
+                    pickedNode = pickedNode.Previous.Unwrap();
+                    alreadyMoved--;
+                }
+            } else if (pickedOffset > 0) {
+                while (alreadyMoved != pickedOffset) {
+                    pickedNode = pickedNode.Next.Unwrap();
+                    alreadyMoved++;
+                }
+            }
+
+            // 设置Cursor
+            m_Cursor = new LinkedListCursor<TasFrame>(pickedNode, desiredIndex);
+        }
+
+        public TasFrame Visit(int index) {
+            if (index >= m_Container.Count || index < 0) {
+                throw new IndexOutOfRangeException("Invalid index for frame.");
+            } else {
+                MoveToIndex(index);
+                return m_Cursor.Node.Value;
+            }
+        }
+
+        private IEnumerable<TasFrame> BatchlyVisitEx(int startIndex, int endIndex) {
+            if (endIndex < startIndex || startIndex < 0 || endIndex >= m_Container.Count) {
+                throw new IndexOutOfRangeException("Invalid index for frame.");
+            }
+
+            // We move to start index first.
+            MoveToIndex(startIndex);
+            // Then we copy its reference
+            LinkedListNode<TasFrame>? node = m_Cursor.Node;
+            // Then compute count
+            var count = endIndex - startIndex + 1;
+            // Now we can iterate items one by one.
+            for (int i = 0; i < count; ++i) {
+                node = node.Unwrap();
+                yield return node.Unwrap().Value;
+                node = node.Next;
+            }
+        }
+
+        public IExactSizeEnumerable<TasFrame> BatchlyVisit(int startIndex, int endIndex) {
+            return new ExactSizeEnumerableAdapter<TasFrame>(BatchlyVisitEx(startIndex, endIndex), endIndex - startIndex + 1);
+        }
+
+        public void Insert(int index, IExactSizeEnumerable<TasFrame> items) {
+            // YYC MARK:
+            // We must test the equal first, to handle back appending properly.
+            if (index == m_Container.Count) {
+                foreach (TasFrame item in items) {
+                    m_Container.AddLast(item);
+                }
+
+                var pendingCursor = m_Container.First;
+                if (pendingCursor is null) {
+                    m_Cursor = null;
+                } else {
+                    m_Cursor = new LinkedListCursor<TasFrame>(pendingCursor, 0);
+                }
+            } else {
+                if (index >= m_Container.Count || index < 0) {
+                    throw new IndexOutOfRangeException("Invalid index for frame.");
+                } else {
+                    MoveToIndex(index);
+
+                    foreach (TasFrame item in items) {
+                        m_Container.AddBefore(m_Cursor.Node, item);
+                    }
+                    m_Cursor.Index += items.GetCount();
+                }
+            }
+        }
+
+        public void Remove(int startIndex, int endIndex) {
+            if (endIndex < startIndex || startIndex < 0 || endIndex >= m_Container.Count) {
+                throw new IndexOutOfRangeException("Invalid index for frame.");
+            }
+
+            // Compute count and move to index.
+            var count = endIndex - startIndex + 1;
+            MoveToIndex(startIndex);
+
+            // 我们总是获取要删除的项目的前一项来作为参照。
+            // 如果获取到的是null，则说明是正在删第一项，从m_Container里获取First来删除就行，
+            // 否则就继续用这个Node的Next来删除。
+            var prevNode = m_Cursor.Node.Previous;
+            if (prevNode is null) {
+                for (int i = 0; i < count; ++i) {
+                    m_Container.RemoveFirst();
+                }
+            } else {
+                for (int i = 0; i < count; ++i) {
+                    m_Container.Remove(prevNode.Next.Unwrap());
+                }
+            }
+
+            // 然后设置Cursor和Index
+            if (IsEmpty()) {
+                // 如果全部删完了，就清除这两个的设置。
+                m_Cursor = null;
+            } else {
+                if (prevNode is null) {
+                    // 如果是按头部删除的，则直接获取头部及其Index。
+                    m_Cursor = new LinkedListCursor<TasFrame>(m_Container.First.Unwrap(), 0);
+                } else {
+                    // 否则就以prevNode为当前Cursor，Index--为对应Index。
+                    m_Cursor.Node = prevNode;
+                    --m_Cursor.Index;
+                }
+            }
+        }
+
+        public void Clear() {
+            m_Container.Clear();
+            m_Cursor = null;
+        }
+
+        public int GetCount() {
+            return m_Container.Count;
+        }
+
+        public bool IsEmpty() {
+            return GetCount() == 0;
+        }
+
+        public IEnumerator<TasFrame> GetEnumerator() {
+            return m_Container.GetEnumerator();
+        }
+
+        IEnumerator IEnumerable.GetEnumerator() {
+            return GetEnumerator();
+        }
+    }
+}

BallanceTasEditor/BallanceTasEditor/Backend/TasStorage.cs

@@ -0,0 +1,177 @@
+using CommunityToolkit.HighPerformance;
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Runtime.InteropServices;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace BallanceTasEditor.Backend {
+    public static class TasStorage {
+
+        /// <summary>
+        /// Initialize given TAS sequence with given count frame which has given FPS.
+        /// </summary>
+        /// <param name="seq">The TAS sequence to initialize.</param>
+        /// <param name="count">The count of frame.</param>
+        /// <param name="fps">The FPS of frame.</param>
+        public static void Init(ITasSequence seq, int count, uint fps) {
+            var frame = TasFrame.FromFps(fps);
+            var iter = Enumerable.Range(0, count).Select((_) => frame.Clone());
+            var exactSizeIter = new ExactSizeEnumerableAdapter<TasFrame>(iter, count);
+            seq.Insert(seq.GetCount(), exactSizeIter);
+        }
+
+        internal const int SIZEOF_I32 = sizeof(int);
+        internal const int SIZEOF_F32 = sizeof(float);
+        internal const int SIZEOF_U32 = sizeof(uint);
+        internal const int SIZEOF_RAW_TAS_FRAME = SIZEOF_F32 + SIZEOF_U32;
+
+        /// <summary>
+        /// Save given TAS sequence into given file path.
+        /// </summary>
+        /// <param name="filepath">The path to file for saving.</param>
+        /// <param name="seq">The TAS sequence to save.</param>
+        /// <exception cref="Exception">Any exception occurs when saving.</exception>
+        public static void Save(string filepath, ITasSequence seq) {
+            using (var fs = new FileStream(filepath, FileMode.OpenOrCreate, FileAccess.Write, FileShare.None)) {
+                Save(fs, seq);
+                fs.Close();
+            }
+        }
+
+        /// <summary>
+        /// Save given TAS sequence into given file stream.
+        /// </summary>
+        /// <param name="fs">The file stream for saving.</param>
+        /// <param name="seq">The TAS sequence to save.</param>
+        /// <exception cref="Exception">Any exception occurs when saving.</exception>
+        public static void Save(Stream fs, ITasSequence seq) {
+            var totalByte = seq.GetCount() * SIZEOF_RAW_TAS_FRAME;
+            fs.Write(BitConverter.GetBytes(totalByte), 0, SIZEOF_I32);
+
+            using (var zo = new Ionic.Zlib.ZlibStream(fs, Ionic.Zlib.CompressionMode.Compress, Ionic.Zlib.CompressionLevel.Level9, true)) {
+                foreach (var item in seq) {
+                    var rawItem = item.ToRaw();
+                    zo.Write(BitConverter.GetBytes(rawItem.TimeDelta), 0, SIZEOF_F32);
+                    zo.Write(BitConverter.GetBytes(rawItem.KeyFlags), 0, SIZEOF_U32);
+                }
+                zo.Close();
+            }
+
+            //var zo = new zlib.ZOutputStream(file, 9);
+            //var node = mem.First;
+            //while (node != null) {
+            //    zo.Write(BitConverter.GetBytes(node.Value.deltaTime), 0, 4);
+            //    zo.Write(BitConverter.GetBytes(node.Value.keystates), 0, 4);
+            //    node = node.Next;
+            //}
+            //zo.finish();
+            //zo.Close();
+        }
+
+        /// <summary>
+        /// Load TAS sequence from given file path into given sequence.
+        /// </summary>
+        /// <param name="filepath">The path to file for loading.</param>
+        /// <param name="seq">The TAS sequence to load.</param>
+        /// <exception cref="Exception">Any exception occurs when loading.</exception>
+        public static void Load(string filepath, ITasSequence seq) {
+            using (var fs = new FileStream(filepath, FileMode.Open, FileAccess.Read, FileShare.Read)) {
+                Load(fs, seq);
+                fs.Close();
+            }
+        }
+
+        /// <summary>
+        /// Load TAS sequence from given file stream into given sequence.
+        /// </summary>
+        /// <param name="fs">The file stream for loading.</param>
+        /// <param name="seq">The TAS sequence to load.</param>
+        /// <exception cref="Exception">Any exception occurs when loading.</exception>
+        public static void Load(Stream fs, ITasSequence seq) {
+            // Read total bytes
+            var lenCache = new byte[SIZEOF_I32];
+            fs.Read(lenCache, 0, 4);
+            int expectedLength = BitConverter.ToInt32(lenCache, 0);
+            // Check length and compute count
+            int expectedCount = Math.DivRem(expectedLength, SIZEOF_RAW_TAS_FRAME, out var remainder);
+            ArgumentOutOfRangeException.ThrowIfNotEqual(remainder, 0);
+
+            using (var mem = new MemoryStream()) {
+                using (var zo = new Ionic.Zlib.ZlibStream(mem, Ionic.Zlib.CompressionMode.Decompress, true)) {
+                    CopyStream(fs, zo);
+                    zo.Close();
+                }
+
+                var memWrapper = new EnumerableMemoryStream(mem, expectedCount);
+                seq.Clear();
+                seq.Insert(0, memWrapper);
+
+                mem.Close();
+            }
+
+            //mem.Seek(0, SeekOrigin.Begin);
+            //for (long i = 0; i < expectedCount; i++) {
+            //    ls.AddLast(new FrameData(mem));
+            //}
+            //mem.Close();
+            //zo.Close();
+
+            //var zo = new zlib.ZOutputStream(mem);
+            //CopyStream(file, zo);
+            //zo.finish();
+
+            //mem.Seek(0, SeekOrigin.Begin);
+            //for (long i = 0; i < expectedCount; i++) {
+            //    ls.AddLast(new FrameData(mem));
+            //}
+            //mem.Close();
+            //zo.Close();
+        }
+
+        private const int STREAM_COPY_CHUNK_SIZE = 10240;
+
+        private static void CopyStream(Stream origin, Stream target) {
+            var buffer = new byte[STREAM_COPY_CHUNK_SIZE];
+            int len;
+            while ((len = origin.Read(buffer, 0, STREAM_COPY_CHUNK_SIZE)) > 0) {
+                target.Write(buffer, 0, len);
+            }
+            //target.Flush();
+        }
+
+        private sealed class EnumerableMemoryStream : IExactSizeEnumerable<TasFrame> {
+            public EnumerableMemoryStream(MemoryStream mem, int frameCnt) {
+                m_MemoryStream = mem;
+                m_FrameCount = frameCnt;
+            }
+
+            private MemoryStream m_MemoryStream;
+            private int m_FrameCount;
+
+            public IEnumerator<TasFrame> GetEnumerator() {
+                // Get the view of underlying array
+                var memory = m_MemoryStream.GetBuffer().AsMemory();
+                // Get the span which actually storing the data,
+                // because the length of buffer is equal or longer than the length of all stored data.
+                var exactMemory = memory.Slice(0, m_FrameCount * SIZEOF_RAW_TAS_FRAME);
+                // Convert to raw frame type.
+                var frameMemory = exactMemory.Cast<byte, RawTasFrame>();
+                // Map it and return.
+                return MemoryMarshal.ToEnumerable<RawTasFrame>(frameMemory).Select((rawFrame) => TasFrame.FromRaw(rawFrame)).GetEnumerator();
+            }
+
+            IEnumerator IEnumerable.GetEnumerator() {
+                return GetEnumerator();
+            }
+
+            public int GetCount() {
+                return m_FrameCount;
+            }
+        }
+
+    }
+}

BallanceTasEditor/BallanceTasEditor/BallanceTasEditor.csproj

@@ -0,0 +1,27 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>WinExe</OutputType>
+    <TargetFramework>net8.0-windows</TargetFramework>
+    <Nullable>enable</Nullable>
+    <UseWPF>true</UseWPF>
+    <ApplicationIcon>Frontend\Assets\App.ico</ApplicationIcon>
+    <ApplicationManifest>app.manifest</ApplicationManifest>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <Resource Include="Frontend\Assets\*.ico" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="CommunityToolkit.HighPerformance" Version="8.4.0" />
+    <PackageReference Include="CommunityToolkit.Mvvm" Version="8.2.1" />
+    <PackageReference Include="DotNetZip" Version="1.9.1.8" />
+    <PackageReference Include="System.Configuration.ConfigurationManager" Version="10.0.5" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Folder Include="Frontend\Models\" />
+  </ItemGroup>
+
+</Project>