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ln.templates
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Refactored some class namespaces, re-implemented v-include to support <slot name=""> and <... v-slot="slotname">...</...>

master
Harald Wolff 2023-07-23 01:56:57 +02:00
parent fb412cd3b9
commit 2a981cd155
43 changed files with 784 additions and 1747 deletions
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13
.idea/.idea.ln.templates/.idea/.gitignore vendored 100644
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@ -0,0 +1,13 @@
# Default ignored files
/shelf/
/workspace.xml
# Rider ignored files
/projectSettingsUpdater.xml
/.idea.ln.templates.iml
/modules.xml
/contentModel.xml
# Datasource local storage ignored files
/dataSources/
/dataSources.local.xml
# Editor-based HTTP Client requests
/httpRequests/

4
.idea/.idea.ln.templates/.idea/encodings.xml 100644
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@ -0,0 +1,4 @@
<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
<component name="Encoding" addBOMForNewFiles="with BOM under Windows, with no BOM otherwise" />
</project>

8
.idea/.idea.ln.templates/.idea/indexLayout.xml 100644
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@ -0,0 +1,8 @@
<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
<component name="UserContentModel">
<attachedFolders />
<explicitIncludes />
<explicitExcludes />
</component>
</project>

6
.idea/.idea.ln.templates/.idea/vcs.xml 100644
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@ -0,0 +1,6 @@
<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
<component name="VcsDirectoryMappings">
<mapping directory="$PROJECT_DIR$" vcs="Git" />
</component>
</project>

2
build.ln
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@ -3,7 +3,7 @@
"dotnet"
],
"env": {
"NUGET_SOURCE": "https://nexus.niclas-thobaben.de/repository/l--n.de/",
"NUGET_SOURCE": "https://nexus.l--n.de/repository/ln.net/",
"CONFIGURATION": "Release"
},
"stages": [

60
ln.http.templates/FileSystemTemplateRouter.cs 100644
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@ -0,0 +1,60 @@
using ln.http.route;
using ln.templates;
using ln.templates.html;
namespace ln.http.templates
{
public class FileSystemTemplateRouter : HttpRoute, IDisposable
{
private HttpRouter _parentRouter;
private FileSystemTemplateSource _fileSystemTemplateSource;
public FileSystemTemplateRouter(HttpRouter parentRouter, string mapPath, string fileSystemPath)
:this(parentRouter, mapPath, new FileSystemTemplateSource(fileSystemPath))
{
}
public FileSystemTemplateRouter(HttpRouter parentRouter, string mapPath, FileSystemTemplateSource fileSystemTemplateSource)
:base(HttpMethod.GET, mapPath)
{
_routerDelegate = RouteTemplate;
_fileSystemTemplateSource = fileSystemTemplateSource;
_parentRouter = parentRouter;
_parentRouter?.Map(this);
}
bool RouteTemplate(HttpRequestContext requestContext, string routePath)
{
if (routePath.EndsWith("/"))
routePath = string.Format("{0}index.html", routePath);
if (!routePath.EndsWith(".html"))
return false;
TemplateDocument templateDocument = _fileSystemTemplateSource.GetTemplateByPath(routePath.Substring(1));
if (templateDocument is null)
return false;
StreamedContent streamedContent = new StreamedContent("text/html");
requestContext.Response = HttpResponse.OK().Content(streamedContent);
RenderContext renderContext = new RenderContext(
new StreamWriter(streamedContent.ContentStream),
_fileSystemTemplateSource, new[]
{
new KeyValuePair<string, object>("request", requestContext.Request),
new KeyValuePair<string, object>("response", requestContext.Response),
new KeyValuePair<string, object>("context", requestContext)
}
);
templateDocument.RenderTemplate(renderContext);
return true;
}
public void Dispose()
{
_parentRouter?.UnMap(this);
}
}
}

17
ln.http.templates/ln.http.templates.csproj 100644
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@ -0,0 +1,17 @@
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<ImplicitUsings>enable</ImplicitUsings>
<Nullable>enable</Nullable>
<PackageVersion>0.9.2</PackageVersion>
<GeneratePackageOnBuild>true</GeneratePackageOnBuild>
<TargetFrameworks>net5.0;net6.0</TargetFrameworks>
<LangVersion>default</LangVersion>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="ln.http" Version="0.9.1-test01" />
<PackageReference Include="ln.templates" Version="0.4.0" />
</ItemGroup>
</Project>

14
ln.templates.sln
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@ -7,6 +7,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ln.templates", "ln.template
EndProject
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ln.templates.test", "ln.templates.test\ln.templates.test.csproj", "{36593773-B517-4B62-BAD2-8AA632AA159E}"
EndProject
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ln.http.templates", "ln.http.templates\ln.http.templates.csproj", "{011E8B81-DF87-4AFB-BEA8-ADA6FD3F3665}"
EndProject
Global
GlobalSection(SolutionConfigurationPlatforms) = preSolution
Debug|Any CPU = Debug|Any CPU
@ -44,5 +46,17 @@ Global
{36593773-B517-4B62-BAD2-8AA632AA159E}.Release|x64.Build.0 = Release|Any CPU
{36593773-B517-4B62-BAD2-8AA632AA159E}.Release|x86.ActiveCfg = Release|Any CPU
{36593773-B517-4B62-BAD2-8AA632AA159E}.Release|x86.Build.0 = Release|Any CPU
{011E8B81-DF87-4AFB-BEA8-ADA6FD3F3665}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
{011E8B81-DF87-4AFB-BEA8-ADA6FD3F3665}.Debug|Any CPU.Build.0 = Debug|Any CPU
{011E8B81-DF87-4AFB-BEA8-ADA6FD3F3665}.Debug|x64.ActiveCfg = Debug|Any CPU
{011E8B81-DF87-4AFB-BEA8-ADA6FD3F3665}.Debug|x64.Build.0 = Debug|Any CPU
{011E8B81-DF87-4AFB-BEA8-ADA6FD3F3665}.Debug|x86.ActiveCfg = Debug|Any CPU
{011E8B81-DF87-4AFB-BEA8-ADA6FD3F3665}.Debug|x86.Build.0 = Debug|Any CPU
{011E8B81-DF87-4AFB-BEA8-ADA6FD3F3665}.Release|Any CPU.ActiveCfg = Release|Any CPU
{011E8B81-DF87-4AFB-BEA8-ADA6FD3F3665}.Release|Any CPU.Build.0 = Release|Any CPU
{011E8B81-DF87-4AFB-BEA8-ADA6FD3F3665}.Release|x64.ActiveCfg = Release|Any CPU
{011E8B81-DF87-4AFB-BEA8-ADA6FD3F3665}.Release|x64.Build.0 = Release|Any CPU
{011E8B81-DF87-4AFB-BEA8-ADA6FD3F3665}.Release|x86.ActiveCfg = Release|Any CPU
{011E8B81-DF87-4AFB-BEA8-ADA6FD3F3665}.Release|x86.Build.0 = Release|Any CPU
EndGlobalSection
EndGlobal

67
ln.templates.test/HtmlTests.cs
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@ -17,56 +17,35 @@ namespace ln.templates.test
[TestFixture()]
public class HtmlTests
{
[Test()]
public void TestCase()
[TestCase()]
public void Test_Base()
{
html.TemplateReader templateReader = new html.TemplateReader();
templateReader.Read("<!DOCTYPE HTML>\n<html>\n<head>\n <title>Hello</title>\n</head>\n<body>\n <p>Welcome to this example.</p>\n <p>{{ 'Ich bin ein ScriptText!' }}</p>\n <p>DateTime: {{ Date }}</p>\n <p>Ein bisschen JavaScript: {{ 5 + ' mal ' + 5 + ' = ' + (5*5) }}</p>\n</body>\n</html>");
Template template = new Template("tests/test_base.html", null);
Console.WriteLine("Template Source:\n{0}", template.Document.ToString());
Console.WriteLine("Source rendered:\n{0}", templateReader.Document.ToString());
StringWriter stringWriter = new StringWriter();
RenderContext renderContext = new RenderContext(stringWriter);
renderContext.SetScriptObject("Date", DateTime.Now);
templateReader.TemplateDocument.RenderTemplate(renderContext);
Console.WriteLine("Template rendered:\n{0}", stringWriter.ToString());
StringWriter targetWriter = new StringWriter();
template.Render(targetWriter);
Console.WriteLine("Rendered Document:\n{0}", targetWriter.ToString());
}
[Test()]
public void TestFileSystemTemplateSource()
[TestCase()]
public void Test_Slots()
{
if (File.Exists("templates.tst/frame.html"))
File.Delete("templates.tst/frame.html");
if (File.Exists("templates.tst/head.html"))
File.Delete("templates.tst/head.html");
FileSystemTemplateSource templateSource = new FileSystemTemplateSource("tests");
Template template = templateSource.GetTemplateByPath("test_slots.html");
Console.WriteLine("Template Source:\n{0}", template.Document.ToString());
Directory.CreateDirectory("templates.tst");
using (FileStream fs = new FileStream("templates.tst/frame.html", FileMode.CreateNew))
using (TextWriter tw = new StreamWriter(fs))
{
tw.Write("<!DOCTYPE html><html><head v-include=\"'head.html'\"/></html>");
tw.Flush();
}
using (FileStream fs = new FileStream("templates.tst/head.html", FileMode.CreateNew))
using (TextWriter tw = new StreamWriter(fs))
{
tw.Write("<head><title v-if=\"title != 'Schwurbel'\" v-for:title=\"['One HTML Template Test','Second Title','Schwurbel','Last Title']\">{{ title }}</title></head>");
tw.Flush();
}
FileSystemTemplateSource fileSystemTemplateSource = new FileSystemTemplateSource("templates.tst");
TemplateDocument templateDocument = fileSystemTemplateSource.GetTemplateByPath("frame.html");
StringWriter stringWriter = new StringWriter();
RenderContext renderContext = new RenderContext(stringWriter,fileSystemTemplateSource);
templateDocument.RenderTemplate(renderContext);
Console.WriteLine("Document rendered to: {0}", stringWriter.ToString());
StringWriter targetWriter = new StringWriter();
template.Render(targetWriter);
using (StreamWriter sw = new StreamWriter("test.out.slots.html"))
sw.Write(targetWriter.ToString());
Console.WriteLine("Rendered Document:\n{0}", targetWriter.ToString());
}
}
}

17
ln.templates.test/ln.templates.test.csproj
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@ -1,9 +1,12 @@
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<TargetFramework>netcoreapp3.1</TargetFramework>
<IsPackable>false</IsPackable>
<TargetFrameworks>net5.0;net6.0</TargetFrameworks>
<LangVersion>default</LangVersion>
</PropertyGroup>
<ItemGroup>
@ -16,4 +19,16 @@
<ProjectReference Include="..\ln.templates\ln.templates.csproj" />
</ItemGroup>
<ItemGroup>
<None Update="tests\test_base.html">
<CopyToOutputDirectory>Always</CopyToOutputDirectory>
</None>
<None Update="tests\test_slot_a.html">
<CopyToOutputDirectory>Always</CopyToOutputDirectory>
</None>
<None Update="tests\test_slots.html">
<CopyToOutputDirectory>Always</CopyToOutputDirectory>
</None>
</ItemGroup>
</Project>

10
ln.templates.test/tests/test_base.html 100644
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@ -0,0 +1,10 @@
<!DOCTYPE html>
<html>
<head>
<title>Basic Test Template</title>
</head>
<body>
<h1>Let's check for iterations...</h1>
<p v-for:i="[0,1,2,3,4,5,6,7,8,9]">This is paragraph #{{i}}</p>
</body>
</html>

3
ln.templates.test/tests/test_slot_a.html 100644
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@ -0,0 +1,3 @@
<div style="border: 1px solid black;">
<slot name="title"><h2>Default Title</h2></slot>
</div>

16
ln.templates.test/tests/test_slots.html 100644
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@ -0,0 +1,16 @@
<!DOCTYPE html>
<html>
<body>
<h1>Slot Test</h1>
<div>
<template v-include="test_slot_a.html">
</template>
<template v-include="test_slot_a.html">
<div v-slot="title"><h2>Title A1</h2></div>
</template>
<template v-include="test_slot_a.html">
<div v-slot="title"><h2>Title A2</h2></div>
</template>
</div>
</body>
</html>

53
ln.templates/Context.cs 100644
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@ -0,0 +1,53 @@
using System.Collections.Generic;
using System.IO;
using Jint;
using ln.templates.html;
namespace ln.templates;
public class Context
{
public Context(ITemplateResolver resolver, IEnumerable<KeyValuePair<string, object>> scriptObjects, TextWriter targetWriter)
{
Resolver = resolver;
Engine = new Engine();
foreach (KeyValuePair<string,object> pair in scriptObjects)
Engine.SetValue(pair.Key, pair.Value);
TargetWriter = targetWriter;
}
public Context(ITemplateResolver resolver, Engine engine, TextWriter targetWriter)
{
Resolver = resolver;
Engine = engine;
TargetWriter = targetWriter;
}
public Context(Context source)
{
Resolver = source.Resolver;
Engine = source.Engine;
TargetWriter = source.TargetWriter;
}
public Engine Engine { get; private set; }
public ITemplateResolver Resolver { get; }
public TextWriter TargetWriter { get; }
/**
* Slots to be used for v-include and v-frame
*/
private Dictionary<string, Element> _slots = new Dictionary<string, Element>();
public bool TryGetSlot(string slotName, out Element slot) => _slots.TryGetValue(slotName, out slot);
public void SetSlot(string slotName, Element slot) => _slots[slotName] = slot;
public void ClearSlot(string slotName) => _slots.Remove(slotName);
public void ClearSlots() => _slots.Clear();
public void SetSlots(IEnumerable<KeyValuePair<string, Element>> slots)
{
_slots.Clear();
foreach (var pair in slots)
_slots.Add(pair.Key, pair.Value);
}
}

559
ln.templates/Expression.cs
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@ -1,559 +0,0 @@
using System;
using System.Reflection;
using System.IO;
using System.Text;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Linq;
namespace ln.templates
{
delegate bool ConditionDelegate(char ch);
public class Expression
{
public String Source { get; }
private Eval TopEval { get; set; }
public Expression(String expr)
{
Source = expr;
Compile();
}
public object Evaluate(object o)
{
Context context = new Context(o, null);
return TopEval.Evaluate(context);
}
public object Evaluate(Context context)
{
return TopEval.Evaluate(context);
}
public bool IsTrue(Context context)
{
try
{
object v = Evaluate(context);
if ((v is bool) && ((bool)v))
return true;
if ((v is string) && (!String.Empty.Equals(v)))
return true;
if ((v is int) && ((int)v != 0))
return true;
return false;
}
catch (Exception)
{
return false;
}
}
private void Compile()
{
try
{
StringReader reader = new StringReader(Source);
List<Token> tokens = new List<Token>();
while (reader.Peek() != -1)
ReadToken(reader, tokens);
Queue<Token> qtokens = new Queue<Token>(tokens);
TopEval = BuildExpression(qtokens);
} catch (Exception e)
{
throw new Exception(String.Format("Failed to compile expression: {0}", Source), e);
}
}
private Eval BuildName(Token nameToken,Eval parent,Queue<Token> tokens)
{
if ((tokens.Count > 0) && (tokens.Peek().TokenType == TokenType.OPENLIST))
{
tokens.Dequeue();
List<Eval> pl = new List<Eval>();
while (tokens.Peek().TokenType != TokenType.ENDLIST)
{
pl.Add(BuildExpression(tokens));
if (tokens.Peek().TokenType == TokenType.ENDLIST)
break;
if (tokens.Peek().TokenType != TokenType.COMMA)
throw new FormatException("Expected ',' between parameters to call statement");
tokens.Dequeue();
}
tokens.Dequeue();
return new MethodCall(parent, nameToken.Value, pl.ToArray());
}
else
{
return new Name(parent, nameToken.Value);
}
}
private Eval BuildPath(Queue<Token> tokens)
{
Eval currentEval = BuildName(tokens.Dequeue(), null, tokens);
while (tokens.Count > 0)
{
Token token = tokens.Peek();
switch (token.TokenType)
{
case TokenType.DOT:
tokens.Dequeue();
currentEval = BuildName(tokens.Dequeue(), currentEval, tokens);
break;
case TokenType.OPENINDEXER:
tokens.Dequeue();
Eval index = BuildExpression(tokens);
token = tokens.Dequeue();
if (token.TokenType != TokenType.ENDINDEXER)
throw new FormatException("Expected ']'");
currentEval = new Indexer(currentEval, index);
break;
default:
return currentEval;
}
}
return currentEval;
}
private Eval BuildExpression(Queue<Token> tokens)
{
Token next = tokens.Peek();
switch (next.TokenType)
{
case TokenType.NAME:
return BuildPath(tokens);
case TokenType.NUMBER:
return new Number(tokens.Dequeue().Value);
case TokenType.STRING:
return new CString(tokens.Dequeue().Value);
}
throw new FormatException(String.Format("unexpected Token: {0}", next.Value));
}
private void ReadToken(TextReader reader, List<Token> tokens)
{
if (reader.Peek() == -1)
return;
char ch = (char)reader.Peek();
if (char.IsWhiteSpace(ch))
{
reader.Read();
}
else if (char.IsLetter(ch) || (ch == '_'))
{
ReadName(reader, tokens);
}
else if (char.IsDigit(ch))
{
ReadNumber(reader, tokens);
}
else if (ch == '"')
{
ReadString(reader, tokens);
}
else if (ch == '.')
{
reader.Read();
tokens.Add(new Token(TokenType.DOT, "."));
}
else if (ch == '[')
{
reader.Read();
tokens.Add(new Token(TokenType.OPENINDEXER, new string(new char[] { ch })));
}
else if (ch == ']')
{
reader.Read();
tokens.Add(new Token(TokenType.ENDINDEXER, new string(new char[] { ch })));
}
else if (ch == '(')
{
reader.Read();
tokens.Add(new Token(TokenType.OPENLIST, new string(new char[] { ch })));
}
else if (ch == ')')
{
reader.Read();
tokens.Add(new Token(TokenType.ENDLIST, new string(new char[] { ch })));
}
else if (ch == ',')
{
reader.Read();
tokens.Add(new Token(TokenType.COMMA, new string(new char[] { ch })));
}
else
{
throw new FormatException(String.Format("Unexpected character: {0}", (char)reader.Peek()));
}
}
private void ReadName(TextReader reader, List<Token> tokens)
{
StringBuilder sb = new StringBuilder();
int ch = 0;
while (char.IsLetterOrDigit((char)(ch = reader.Peek())) || (ch == '_'))
{
sb.Append((char)reader.Read());
}
tokens.Add(new Token(TokenType.NAME, sb.ToString()));
}
private void ReadNumber(TextReader reader, List<Token> tokens)
{
StringBuilder sb = new StringBuilder();
int ch = 0;
while (char.IsDigit((char)(ch = reader.Peek())) | (ch == '.'))
{
sb.Append((char)reader.Read());
}
tokens.Add(new Token(TokenType.NUMBER, sb.ToString()));
}
private void ReadString(TextReader reader, List<Token> tokens)
{
StringBuilder sb = new StringBuilder();
int ch = 0;
reader.Read();
while ((ch = reader.Peek())!='"')
{
if (ch == '\\')
{
reader.Read();
char sch = (char)reader.Read();
switch (sch)
{
case 'n':
sb.Append('\n');
break;
case 'r':
sb.Append('\r');
break;
case 't':
sb.Append('\t');
break;
default:
sb.Append(sch);
break;
}
}
else
{
sb.Append((char)reader.Read());
}
}
reader.Read();
tokens.Add(new Token(TokenType.STRING, sb.ToString()));
}
enum TokenType { NAME, DOT, NUMBER, STRING, OPENINDEXER, ENDINDEXER, OPENLIST, ENDLIST, COMMA }
class Token
{
public TokenType TokenType;
public string Value;
public Token(TokenType tokenType,String value)
{
this.TokenType = tokenType;
this.Value = value;
}
public override string ToString()
{
return String.Format("[Token TokenType={0:8} Value={1}]", TokenType, Value);
}
}
public class Context
{
public object This { get; }
public Dictionary<string,object> MappedValues { get; }
public Context(Context source)
: this(source.This, source.MappedValues)
{
}
public Context(object o,IEnumerable<KeyValuePair<string,object>> mappedValues)
{
this.This = o;
this.MappedValues = new Dictionary<string, object>();
if (mappedValues != null)
foreach (KeyValuePair<string, object> kvp in mappedValues)
MappedValues.Add(kvp.Key,kvp.Value);
}
public void AddMappedValue(string name, object value)
{
MappedValues.Add(name, value);
}
public void SetMappedValue(string name, object value)
{
MappedValues[name] = value;
}
public void RemoveMappedValue(string name)
{
MappedValues.Remove(name);
}
public object Evaluate(string name)
{
if (MappedValues.ContainsKey(name))
return MappedValues[name];
if (This != null)
{
FieldInfo fieldInfo = This.GetType().GetField(name);
if (fieldInfo != null)
{
return fieldInfo.GetValue(This);
}
PropertyInfo propertyInfo = This.GetType().GetProperty(name);
if (propertyInfo != null)
{
return propertyInfo.GetValue(This);
}
}
throw new KeyNotFoundException(name);
}
}
abstract class Eval
{
public Eval Parent { get; }
public Eval(Eval parent)
{
this.Parent = parent;
}
public abstract object Evaluate(Context context);
}
class Name : Eval
{
public string name;
public Name(Eval parent,String name)
:base(parent)
{
this.name = name;
}
public override object Evaluate(Context context)
{
if (Parent == null)
{
return context.Evaluate(name);
}
object p = Parent.Evaluate(context);
if (p != null)
{
FieldInfo fieldInfo = p.GetType().GetField(name);
if (fieldInfo != null)
{
return fieldInfo.GetValue(p);
}
PropertyInfo propertyInfo = p.GetType().GetProperty(name);
if (propertyInfo != null)
{
return propertyInfo.GetValue(p);
}
throw new KeyNotFoundException(name);
}
throw new NullReferenceException();
}
}
class Indexer : Eval
{
Eval index;
public Indexer(Eval parent,Eval index)
:base(parent)
{
this.index = index;
}
public override object Evaluate(Context context)
{
object i = index.Evaluate(context);
Type itype = i.GetType();
object p = Parent.Evaluate(context);
if (p is Array)
{
Array pa = p as Array;
return pa.GetValue((int)i);
}
foreach (PropertyInfo pi in p.GetType().GetProperties())
{
ParameterInfo[] infos = pi.GetIndexParameters();
if (infos.Length == 1)
{
if (infos[0].ParameterType.IsAssignableFrom(itype))
{
return pi.GetValue(p, new object[] { i });
}
}
}
throw new KeyNotFoundException();
}
}
class MethodCall : Eval
{
Eval[] Parameters;
String Name;
public MethodCall(Eval parent, String name,params Eval[] p)
: base(parent)
{
Name = name;
Parameters = p;
}
public override object Evaluate(Context context)
{
object p = Parent.Evaluate(context);
object[] pvalues = new object[Parameters.Length];
Type[] ptypes = new Type[Parameters.Length];
for (int i=0;i<pvalues.Length;i++)
{
pvalues[i] = Parameters[i].Evaluate(context);
if (pvalues[i] == null)
ptypes[i] = null;
else
ptypes[i] = pvalues[i].GetType();
}
MethodInfo methodInfo = p.GetType().GetRuntimeMethod(Name, ptypes);
return methodInfo.Invoke(p, pvalues);
}
}
class Number : Eval
{
object value;
public Number(String sourceValue)
: base(null)
{
try
{
value = int.Parse(sourceValue);
} catch
{
value = float.Parse(sourceValue);
}
}
public override object Evaluate(Context context)
{
return value;
}
}
class CString : Eval
{
string value;
public CString(String sourceValue)
: base(null)
{
this.value = sourceValue;
}
public override object Evaluate(Context context)
{
return this.value;
}
}
//private String read(TextReader reader,ConditionDelegate condition)
//{
// StringBuilder sb = new StringBuilder();
// int ch;
// while (((ch = reader.Peek())!=-1)&&condition((char)ch))
// {
// sb.Append((char)ch);
// }
// return sb.ToString();
//}
//private Token ReadToken(TextReader reader)
//{
// int ch = reader.Peek();
// if (char.IsLetter((char)ch))
// return ReadFieldName(reader);
// throw new FormatException();
//}
//private Token ReadPath(TextReader reader)
//{
// String read(reader, (ch) => char.IsLetterOrDigit(ch));
//}
//abstract class Token
//{
// public abstract object Evaluate();
//}
//class Field : Token
//{
// Token owner;
// String fieldName;
// public Field(Token owner,String fieldName)
// {
// this.owner = owner;
// this.fieldName = fieldName;
// }
// public override object Evaluate()
// {
// if (o == null)
// return null;
// Type t = o.GetType();
// FieldInfo fieldInfo = t.GetField(this.fieldName);
// if (fieldInfo != null)
// {
// return fieldInfo.GetValue(owner.Evaluate());
// }
// PropertyInfo propertyInfo = t.GetProperty(this.fieldName);
// if (propertyInfo != null)
// {
// return propertyInfo.GetValue(owner.Evaluate());
// }
// throw new MissingFieldException(t.FullName, this.fieldName);
// }
//}
}
}

52
ln.templates/FileSystemTemplateResolver.cs 100644
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using System;
using System.Collections.Generic;
using System.IO;
using ln.templates.html;
namespace ln.templates
{
public class FileSystemTemplateSource : ITemplateResolver
{
public String BasePath { get; }
public bool Throws { get; }
Dictionary<string, Template> _templates = new Dictionary<string, Template>();
public FileSystemTemplateSource(String path,bool throws)
:this(path)
{
Throws = throws;
}
public FileSystemTemplateSource(String path)
{
path = Path.GetFullPath(path);
if (!Directory.Exists(path))
throw new FileNotFoundException();
BasePath = path;
}
public Template GetTemplateByPath(string path) => GetTemplateByPath(path, Throws);
public Template GetTemplateByPath(string path,bool _throw)
{
string templatePath = Path.Combine(BasePath, path);
if (!File.Exists(templatePath))
{
if (_templates.ContainsKey(path))
_templates.Remove(path);
if (_throw)
throw new FileNotFoundException();
return null;
}
if (!_templates.TryGetValue(path,out Template template))
{
template = new Template(templatePath, this);
_templates[path] = template;
}
return template;
}
}
}

254
ln.templates/FormContext.cs
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@ -1,254 +0,0 @@
using System;
using System.Collections.Generic;
using System.IO;
using System.Text;
using System.Reflection;
using System.Linq;
using System.ComponentModel;
using System.Resources;
namespace ln.templates
{
//public class FormContext
//{
//private Dictionary<string, object> vars = new Dictionary<string, object>();
//protected MemoryStream contentStream, headStream;
//public Template SharpForm { get; }
//public Request Request { get; }
//public Stream ContentStream => contentStream;
//public TextWriter ContentWriter { get; protected set; }
//public Stream HeadStream => headStream;
//public TextWriter HeadWriter { get; protected set; }
//public FormContext Parent { get; }
//public bool UsesClonedVars { get; }
//public bool IsRootContext => Parent == null;
//public FormContext SubFrameContext { get; protected set; }
//public FormContext(Template sharpForm,Request request,object o)
//{
// Parent = null;
// SharpForm = sharpForm;
// Request = request;
// contentStream = new MemoryStream();
// ContentWriter = new StreamWriter(contentStream);
// headStream = new MemoryStream();
// HeadWriter = new StreamWriter(headStream);
// vars["o"] = o;
// vars["this"] = o;
// vars["StrMax"] = GetType().GetMethod("StrMax");
//}
//public FormContext(FormContext parent,bool cloneVars = false,bool independentContent = false,FormContext subFrameContext = null)
//{
// Parent = parent;
// SharpForm = parent.SharpForm;
// Request = parent.Request;
// contentStream = independentContent ? new MemoryStream() : parent.contentStream;
// ContentWriter = new StreamWriter(ContentStream);
// headStream = parent.headStream;
// HeadWriter = parent.HeadWriter;
// UsesClonedVars = cloneVars;
// SubFrameContext = subFrameContext == null ? parent.SubFrameContext : subFrameContext;
// if (cloneVars){
// foreach (KeyValuePair<string,object> var in parent.vars)
// {
// this.vars.Add(var.Key, var.Value);
// }
// }
// parent.ContentWriter.Flush();
//}
//public byte[] ContentBytes
//{
// get
// {
// ContentWriter.Flush();
// return contentStream.ToArray();
// }
//}
//public byte[] HeadBytes
//{
// get
// {
// HeadWriter.Flush();
// return headStream.ToArray();
// }
//}
//public String Content => Encoding.UTF8.GetString(ContentBytes);
//public String Head => Encoding.UTF8.GetString(HeadBytes);
//public void Insert(FormContext context, bool allToHead = false)
//{
// if (context.headStream != headStream)
// {
// HeadWriter.Flush();
// byte[] headBytes = context.HeadBytes;
// headStream.Write(headBytes, 0, headBytes.Length);
// }
// ContentWriter.Flush();
// byte[] contentBytes = context.ContentBytes;
// if (allToHead)
// headStream.Write(contentBytes, 0, contentBytes.Length);
// else
// contentStream.Write(contentBytes, 0, contentBytes.Length);
//}
//public bool HasVar(String name)
//{
// if (vars.ContainsKey(name))
// return true;
// if (!UsesClonedVars && (Parent != null))
// return Parent.HasVar(name);
// return false;
//}
//public object Get(String name){
// if (vars.ContainsKey(name))
// return vars[name];
// else if (Parent != null)
// return Parent.Get(name);
// else
// return null;
//}
//public void Set(String name,object value){
// if (!UsesClonedVars && (Parent != null) && (Parent.HasVar(name)))
// {
// Parent.Set(name, value);
// } else {
// this.vars[name] = value;
// }
//}
//public object EvaluateExpression(Token[] tokens)
//{
// if (tokens.Length == 0)
// {
// return "";
// }
// Stack<Token> tokenStack = new Stack<Token>(tokens);
// object currentValue = null;
// Token currentToken = null;
// while (tokenStack.Count > 0){
// currentToken = tokenStack.Pop();
// if (currentToken is PathToken)
// {
// PathToken pathToken = (PathToken)currentToken;
// Response response = Request.SubRequest(pathToken.Path);
// if (response.Reference != null)
// currentValue = response.Reference;
// else
// currentValue = Encoding.UTF8.GetString(response.ContentBytes);
// } else if (currentToken is KeywordToken)
// {
// KeywordToken keywordToken = (KeywordToken)currentToken;
// currentValue = keywordToken.Evaluate(this);
// }
// if (tokenStack.Count > 0){
// currentToken = tokenStack.Pop();
// throw new NotImplementedException("Currently no expression operators are implemented, sorry");
// }
// }
// return currentValue;
//}
//public object EvaluateValue(String sValue)
//{
// Stack<String> vpath = new Stack<string>(sValue.Split(new char[] { '.' }, StringSplitOptions.RemoveEmptyEntries).Reverse());
// if (vpath.Count > 0)
// {
// object value = null;
// string key = vpath.Pop();
// value = Get(key);
// while (vpath.Count > 0)
// {
// key = vpath.Pop();
// value = GetObjectFieldOrProperty(value, key);
// }
// return value;
// }
// return null;
//}
//public bool EvaluateBoolean(String expression)
//{
// bool invert = (expression[0] == '!');
// if (invert)
// expression = expression.Substring(1);
// object value = EvaluateValue(expression);
// if (value != null)
// {
// if (
// ((value is bool) && (((bool)value))) ||
// ((value is string) && (!String.Empty.Equals(value))) ||
// ((value is int) && (((int)value) != 0)) ||
// ((value is long) && (((long)value) != 0)) ||
// ((value is float) && (((float)value) != 0)) ||
// ((value is double) && (((double)value) != 0))
// )
// {
// return !invert;
// }
// }
// return invert;
//}
//private object GetObjectFieldOrProperty(object o, string name)
//{
// if (o == null)
// {
// return null;
// }
// FieldInfo fieldInfo = o.GetType().GetField(name, BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Static);
// if (fieldInfo != null)
// {
// return fieldInfo.GetValue(o);
// }
// PropertyInfo propertyInfo = o.GetType().GetProperty(name, BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Static);
// if (propertyInfo != null)
// {
// return propertyInfo.GetValue(o);
// }
// throw new KeyNotFoundException(String.Format("object of type {0} has no field/property named {1}", o.GetType().FullName, name));
//}
//public static string StrMax(string s,int len,string suffix = "")
//{
// if (len < s.Length)
// return s.Substring(0, len) + suffix;
// return s;
//}
// }
}

35
ln.templates/FormElement.cs
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@ -1,35 +0,0 @@
using System;
using System.Xml;
using System.Collections.Generic;
namespace ln.templates
{
//public abstract class FormElement
//{
// /* Instance Members */
// FormElement Container { get; }
// List<FormElement> children = new List<FormElement>();
// public FormElement(FormElement container)
// {
// Container = container;
// if (container != null)
// {
// container.children.Add(this);
// }
// }
// public abstract void Run(FormContext context);
// public FormElement[] Children => children.ToArray();
// public virtual Template Form => Container.Form;
// public void RunChildren(FormContext context)
// {
// foreach (FormElement child in children)
// {
// child.Run(context);
// }
// }
//}
}

12
ln.templates/ITemplateResolver.cs 100644
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@ -0,0 +1,12 @@
using System;
using System.Collections.Generic;
using System.Text;
using ln.templates.html;
namespace ln.templates
{
public interface ITemplateResolver
{
Template GetTemplateByPath(string path);
}
}

82
ln.templates/RecursiveResolver.cs 100644
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@ -0,0 +1,82 @@
using System;
using System.Collections.Generic;
using System.IO;
using Esprima.Ast;
using ln.templates.html;
namespace ln.templates;
public class RecursiveResolver : ITemplateResolver
{
public RecursiveResolver(string path)
:this(null, path)
{
}
private RecursiveResolver(RecursiveResolver parent, string path)
{
Parent = parent;
Path = path;
if (!Directory.Exists(path))
throw new DirectoryNotFoundException(path);
}
public RecursiveResolver Root => Parent?.Root ?? this;
public RecursiveResolver Parent { get; private set; }
public string Path { get; private set; }
private bool IsAlive => Directory.Exists(Path);
private Dictionary<string, RecursiveResolver> _children = new Dictionary<string, RecursiveResolver>();
private Dictionary<string, Template> _templates = new Dictionary<string, Template>();
public RecursiveResolver FindResolver(string path) => FindResolver(
System.IO.Path.GetDirectoryName(path)?.Split(System.IO.Path.PathSeparator) ?? Array.Empty<string>());
private RecursiveResolver FindResolver(Span<string> pathElements)
{
if (pathElements.Length == 0)
throw new ArgumentOutOfRangeException(nameof(pathElements));
if (_children.TryGetValue(pathElements[0], out RecursiveResolver child))
{
if (!child.IsAlive)
{
_children.Remove(pathElements[0]);
return null;
}
if (pathElements.Length > 1)
return child.FindResolver(pathElements.Slice(1));
return child;
}
return null;
}
public Template GetTemplateByPath(string templatePath)
{
Span<string> pathElements = templatePath.Split(System.IO.Path.DirectorySeparatorChar);
RecursiveResolver resolver = FindResolver(pathElements.Slice(0, pathElements.Length - 1));
return resolver?.GetTemplate(pathElements[^1]);
}
public Template GetTemplate(string name)
{
string filename = System.IO.Path.Combine(Path, name);
if (File.Exists(filename))
{
if (!_templates.TryGetValue(name, out Template template))
{
template = new Template(filename, this);
_templates.Add(name, template);
}
return template;
}
return null;
}
}

168
ln.templates/Template.cs
View File

@ -1,132 +1,56 @@
using System;
using System;
using System.Collections.Generic;
using System.IO;
using System.Text;
using ln.templates.elements;
using ln.templates.html;
namespace ln.templates
namespace ln.templates;
public class Template
{
public class Template
public Template(string filename, ITemplateResolver resolver)
:this(filename, resolver, null)
{}
private Template(string filename, ITemplateResolver resolver, string source)
{
public TemplateProvider Provider { get; private set; }
public String SourceFilename { get; private set; }
public String PseudoFilename { get; private set; }
public DateTime SourceTimeStamp { get; private set; }
FileName = filename;
Resolver = resolver;
public Element RootElement { get; private set; }
public Expression FrameExpression { get; private set; }
public Template(String sourceFilename)
if (source is null)
{
SourceFilename = sourceFilename;
PseudoFilename = sourceFilename;
LoadSource(null);
Load();
}
public Template(String sourceFilename, TemplateProvider provider)
else
{
Provider = provider;
SourceFilename = sourceFilename;
PseudoFilename = sourceFilename;
LoadSource(null);
Document = TemplateReader.Parse(source);
}
public Template(String source,String pseudoFilename,TemplateProvider provider)
{
Provider = provider;
PseudoFilename = pseudoFilename;
LoadSource(source);
}
private void LoadSource(String source)
{
if (source == null)
{
using (FileStream fileStream = new FileStream(SourceFilename, FileMode.Open))
{
byte[] loadBuffer = new byte[fileStream.Length];
fileStream.Read(loadBuffer, 0, loadBuffer.Length);
fileStream.Close();
source = Encoding.UTF8.GetString(loadBuffer);
SourceTimeStamp = File.GetLastWriteTimeUtc(SourceFilename);
}
}
TemplateReader templateReader = new TemplateReader(source);
RootElement = templateReader.RootElement;
FrameExpression = templateReader.FrameExpression;
}
public String Generate()
{
return Generate(false);
}
public String Generate(bool unframed)
{
Context context = new Context(this);
return Generate(context);
}
public String Generate(Context context)
{
return Generate(context, false);
}
public String Generate(Context context,bool unframed)
{
if (SourceFilename != null)
{
DateTime ts = File.GetLastWriteTimeUtc(SourceFilename);
if (ts > SourceTimeStamp)
LoadSource(null);
}
StringWriter writer = new StringWriter();
RootElement.Generate(writer, context);
if (!unframed && (FrameExpression != null))
{
Template frame = context.Provider.FindTemplate(FrameExpression.Evaluate(context.ExpressionContext) as string);
if (frame == null)
{
throw new NullReferenceException(String.Format("FindTemplate() returned null for {0}",FrameExpression.Source));
}
return frame.Generate(new Context(context, writer.ToString()));
}
return writer.ToString();
}
public class Context
{
public Context Parent { get; }
public Template Template { get; }
public TemplateProvider Provider => Template.Provider;
public String FramedContent { get; }
public Expression.Context ExpressionContext { get; }
public Context(Template template)
{
Template = template;
ExpressionContext = new Expression.Context(null, null);
ExpressionContext.AddMappedValue("__template__", template.SourceFilename);
ExpressionContext.AddMappedValue("__provider__", template.Provider);
}
public Context(Context parent,String framedContent)
{
Parent = parent;
Template = parent.Template;
FramedContent = framedContent;
ExpressionContext = new Expression.Context(parent.ExpressionContext);
if (framedContent != null)
ExpressionContext.SetMappedValue("__frame__", framedContent);
}
}
}
}
private void Load()
{
Document = TemplateReader.ReadTemplate(FileName);
LastWriteTime = File.GetLastWriteTime(FileName);
}
public ITemplateResolver Resolver { get; }
public string FileName { get; }
public TemplateDocument Document { get; private set; }
public DateTime LastWriteTime { get; private set; }
public void Render(TextWriter target) => Render(target, Array.Empty<KeyValuePair<string, object>>());
public void Render(TextWriter target, IEnumerable<KeyValuePair<string, object>> scriptObjects)
{
Context context = new Context(Resolver, scriptObjects, target);
Render(context);
}
public void Render(Context context)
{
DateTime currentLastWriteTime = File.GetLastWriteTime(FileName);
if (currentLastWriteTime > LastWriteTime)
Load();
Document.RenderTemplate(context);
}
}

8
ln.templates/TemplateProvider.cs
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@ -1,8 +0,0 @@
using System;
namespace ln.templates
{
public interface TemplateProvider
{
Template FindTemplate(string templatePath);
}
}

201
ln.templates/TemplateReader.cs
View File

@ -1,151 +1,104 @@
using System;
using System.Collections.Generic;
using ln.templates.elements;
// /**
// * File: TemplateReader.cs
// * Author: haraldwolff
// *
// * This file and it's content is copyrighted by the Author and / or copyright holder.
// * Any use wihtout proper permission is illegal and may lead to legal actions.
// *
// *
// **/
using System;
using System.IO;
using System.Text;
using System.Net;
using ln.templates.html;
namespace ln.templates
{
public class TemplateReader
public class TemplateReader : ElementReader
{
public ContainerElement RootElement { get; private set; } = new ContainerElement(null);
public ContainerElement CurrentElement { get; private set; }
public Expression FrameExpression { get; private set; }
public virtual TemplateDocument TemplateDocument => Document as TemplateDocument;
public String Source { get; private set; }
public TemplateReader(String source)
protected TemplateReader()
{
Source = source;
Parse();
}
private void Parse()
public override DocumentElement CreateDocument() => new TemplateDocument();
public override Element CreateElement(string tagName) => TemplateElement.Create(tagName);
public override void CloseTag(string tagName)
{
CurrentElement = RootElement;
while (Source.Length > 0)
Element saveCurrentElement = CurrentElement;
base.CloseTag(tagName);
if (saveCurrentElement.HasAttribute("v-slot") && (saveCurrentElement.Parent is TemplateElement parentElement))
{
String t, op;
int i, j;
parentElement.SetSlot(saveCurrentElement.GetAttribute("v-slot"), saveCurrentElement);
parentElement.RemoveChild(saveCurrentElement);
saveCurrentElement.RemoveAttribute("v-slot");
}
}
i = Source.IndexOf("<%");
if (i == -1)
public override void Text(string text)
{
if (text.Contains("{{"))
{
int pOpen = 0;
int pClose = 0;
while (pOpen < text.Length)
{
t = Source;
op = null;
Source = "";
}
else
{
t = Source.Substring(0, i);
j = Source.IndexOf("%>", i + 1);
if (j == -1)
pOpen = text.IndexOf("{{", pClose);
if (pOpen == -1)
pOpen = text.Length;
string preText = text.Substring(pClose, pOpen - pClose);
if (preText.Length > 0)
{
throw new FormatException(String.Format("missing '%>' in {0}", Source.Substring(i, 64)));
CurrentElement.AppendChild(CreateTextElement(preText));
}
op = Source.Substring(i + 2, j - i - 2);
Source = Source.Substring(j + 2);
if (pOpen == text.Length)
break;
pOpen += 2;
pClose = text.IndexOf("}}", pOpen);
if (pClose == -1)
throw new FormatException("missing }}");
string expr = text.Substring(pOpen, pClose - pOpen);
pClose += 2;
CurrentElement.AppendChild(new ExpressionElement(expr));
}
new TextElement(CurrentElement, t);
if (op != null)
ParseOP(op);
} else
{
CurrentElement.AppendChild(
CreateTextElement(text)
);
}
}
private void ParseOP(String op)
public static TemplateDocument Parse(string source)
{
StringReader reader = new StringReader(op);
String opkey;
if (reader.Peek() == '=')
{
reader.Read();
opkey = "=";
}
else
{
opkey = reader.PopWord();
}
switch (opkey)
{
case "=":
new ExpressionElement(CurrentElement, new Expression(reader.ReadToEnd()));
break;
case "frame":
FrameExpression = new Expression(reader.ReadToEnd());
break;
case "iterate":
String iterName = reader.PopWord();
CurrentElement = new IteratorElement(CurrentElement, iterName, new Expression(reader.ReadToEnd()));
break;
case "if":
CurrentElement = new ConditionalElement(CurrentElement, new Expression(reader.ReadToEnd()));
break;
case "else":
if (CurrentElement is ConditionalElement)
{
ConditionalElement ce = CurrentElement as ConditionalElement;
CurrentElement = ce.AlternativeContainer;
}
break;
case "elseif":
if (CurrentElement is ConditionalElement)
{
ConditionalElement ce = CurrentElement as ConditionalElement;
CurrentElement = new ConditionalElement(null, new Expression(reader.ReadToEnd()));
ce.AlternativeContainer = CurrentElement;
}
break;
case "include":
new IncludeElement(CurrentElement, new Expression(reader.ReadToEnd()));
break;
case "set":
String setName = reader.PopWord();
new SetElement(CurrentElement, setName, new Expression(reader.ReadToEnd()));
break;
case "end":
CurrentElement = CurrentElement.Container;
break;
default:
throw new NotImplementedException(opkey);
}
using (StringReader reader = new StringReader(source))
return ReadTemplate(reader);
}
}
static class StringHelper
{
public static int IndexOf(this String s,Func<char,bool> predicate)
public static TemplateDocument ReadTemplate(string filename)
{
for (int i=0;i<s.Length;i++)
{
if (predicate(s[i]))
return i;
}
return -1;
using (StreamReader reader = new StreamReader(filename))
return ReadTemplate(reader);
}
public static TemplateDocument ReadTemplate(TextReader reader)
{
var templateReader = new TemplateReader();
templateReader.Read(reader);
return templateReader.TemplateDocument;
}
public static void SkipWhiteSpace(this TextReader reader)
{
while (char.IsWhiteSpace((char)reader.Peek()))
{
reader.Read();
}
}
public static String PopWord(this TextReader reader)
{
StringBuilder stringBuilder = new StringBuilder();
while ((reader.Peek()!=-1) && !char.IsWhiteSpace((char)reader.Peek()))
{
stringBuilder.Append((char)reader.Read());
}
reader.SkipWhiteSpace();
return stringBuilder.ToString();
}
}
}

99
ln.templates/elements/Conditionals.cs
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@ -1,99 +0,0 @@
using System;
using System.IO;
using System.Collections;
namespace ln.templates.elements
{
public class ConditionalElement : ContainerElement
{
private ContainerElement alternativeContainer;
public Expression Expression { get; private set; }
public ConditionalElement(ContainerElement container,Expression expression)
:base(container)
{
Expression = expression;
AlternativeContainer = new ContainerElement(null);
}
private bool IsTrue(object value)
{
return (
(value != null) &&
((value is int) && ((int)value != 0)) ||
((value is double) && ((double)value != 0.0)) ||
((value is bool) && ((bool)value)) ||
((value is string) && (!String.Empty.Equals(value)))
);
}
public override void Generate(TextWriter writer, Template.Context context)
{
if (Expression.IsTrue(context.ExpressionContext))
{
GenerateChildren(writer, context);
}
else if (AlternativeContainer != null)
{
AlternativeContainer.Generate(writer, context);
}
}
public ContainerElement AlternativeContainer {
get
{
return alternativeContainer;
}
set
{
if (alternativeContainer != null)
{
alternativeContainer.Container = null;
}
if (value != null)
{
value.Container = Container;
}
alternativeContainer = value;
}
}
}
public class IteratorElement : ConditionalElement
{
public String IterName { get; private set; }
public IteratorElement(ContainerElement container,String iterName,Expression expression)
:base(container, expression)
{
IterName = iterName;
}
public override void Generate(TextWriter writer, Template.Context context)
{
object v = Expression.Evaluate(context.ExpressionContext);
if (v == null)
{
AlternativeContainer.Generate(writer, context);
}
else if (v is IEnumerable)
{
Template.Context icontext = new Template.Context(context,null);
bool b = false;
IEnumerable en = v as IEnumerable;
foreach (object o in en)
{
b = true;
icontext.ExpressionContext.SetMappedValue(IterName, o);
GenerateChildren(writer, icontext);
}
}
}
}
}

97
ln.templates/elements/Element.cs
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@ -1,97 +0,0 @@
using System;
using System.IO;
using System.Collections.Generic;
namespace ln.templates.elements
{
public abstract class Element
{
public ContainerElement Container { get; internal set; }
protected Element(ContainerElement container)
{
Container = container;
if (Container != null)
Container.children.Add(this);
}
public abstract void Generate(TextWriter writer, Template.Context context);
}
public class ContainerElement : Element
{
internal List<Element> children { get; } = new List<Element>();
public ContainerElement(ContainerElement container)
:base(container)
{
}
public void GenerateChildren(TextWriter writer, Template.Context context)
{
foreach (Element c in children)
c.Generate(writer, context);
}
public override void Generate(TextWriter writer, Template.Context context)
{
GenerateChildren(writer, context);
}
public Element[] Children
{
get => children.ToArray();
}
}
public class TextElement : Element
{
public String Text { get; }
public TextElement(ContainerElement container,String text)
:base(container)
{
Text = text;
}
public override void Generate(TextWriter writer, Template.Context context)
{
writer.Write(Text);
}
}
public class ExpressionElement : Element
{
public Expression Expression { get; }
public ExpressionElement(ContainerElement container,Expression expression)
:base(container)
{
Expression = expression;
}
public override void Generate(TextWriter writer, Template.Context context)
{
object v = Expression.Evaluate(context.ExpressionContext);
if (v != null)
writer.Write(v.ToString());
}
}
public class SetElement : Element
{
public String SetName { get; }
public Expression Expression { get; }
public SetElement(ContainerElement container, String setName,Expression expression)
: base(container)
{
SetName = setName;
Expression = expression;
}
public override void Generate(TextWriter writer, Template.Context context)
{
object v = Expression.Evaluate(context.ExpressionContext);
context.ExpressionContext.SetMappedValue(SetName, v);
}
}
}

45
ln.templates/elements/IncludeElement.cs
View File

@ -1,45 +0,0 @@
using System;
using System.IO;
using System.Collections.Generic;
namespace ln.templates.elements
{
public class IncludeElement : Element
{
Expression TargetExpression { get; set; }
public IncludeElement(ContainerElement container,Expression targetExpression)
:base(container)
{
TargetExpression = targetExpression;
}
public void Generate(TextWriter writer, Template.Context context,String templatePath)
{
Template iTemplate = context.Provider.FindTemplate(templatePath);
Template.Context iContext = new Template.Context(context, null);
String iContent = iTemplate.Generate(iContext);
writer.Write(iContent);
}
public override void Generate(TextWriter writer, Template.Context context)
{
object target = TargetExpression.Evaluate(context.ExpressionContext);
if (target is IEnumerable<String>)
{
IEnumerable<String> targets = (IEnumerable<String>)target;
foreach (String t in targets)
{
Generate(writer, context, t);
}
}
else
{
Generate(writer, context, target as String);
}
}
}
}

5
ln.templates/html/DocumentElement.cs
View File

@ -19,9 +19,12 @@ namespace ln.templates.html
{
}
public string DocType { get; set; }
public override void Render(TextWriter writer)
{
writer.Write("<!DOCTYPE html>");
if (DocType is not null)
writer.Write("<!DOCTYPE {0}>", DocType);
foreach (Element element in Children)
element.Render(writer);

12
ln.templates/html/Element.cs
View File

@ -38,9 +38,17 @@ namespace ln.templates.html
public virtual bool HasAttribute(string attributeName) => attributes.ContainsKey(attributeName);
public virtual string GetAttribute(string attributeName) => attributes[attributeName];
public virtual void SetAttribute(string attributeName, string attributeValue) => attributes[attributeName] = attributeValue;
public virtual void RemoveAttribute(string attributeName) => attributes.Remove(attributeName);
public virtual string GetAttribute(string attributeName, string defaultValue)
{
if (attributes.TryGetValue(attributeName, out string value))
return value;
return defaultValue;
}
public IEnumerable<Element> Children => children;
public void AppendChild(Element element)
public virtual void AppendChild(Element element)
{
if (element.Parent != null)
element.Parent.RemoveChild(element);
@ -55,7 +63,7 @@ namespace ln.templates.html
element.Parent = this;
}
}
public void RemoveChild(Element element)
public virtual void RemoveChild(Element element)
{
if (element.Parent != this)
throw new KeyNotFoundException();

6
ln.templates/html/ElementReader.cs
View File

@ -61,6 +61,12 @@ namespace ln.templates.html
{
Pop();
}
public override void DOCTYPE(string type)
{
Document.DocType = type;
}
public override void Attribute(string attributeName, string attributeValue)
{
CurrentElement.SetAttribute(attributeName, attributeValue);

6
ln.templates/html/ExpressionElement.cs
View File

@ -29,10 +29,10 @@ namespace ln.templates.html
writer.Write("{{{{{0}}}}}", ExpressionText);
}
public override void RenderTemplate(RenderContext renderContext)
public override void RenderTemplate(Context renderContext)
{
object o = Expression.Resolve(renderContext);
renderContext.ContentWriter.Write(o?.ToString());
object o = Expression.Resolve(renderContext.Engine);
renderContext.TargetWriter.Write(o?.ToString());
}

72
ln.templates/html/FileSystemTemplateSource.cs
View File

@ -1,72 +0,0 @@
using System;
using System.Collections.Generic;
using System.IO;
using System.Text;
namespace ln.templates.html
{
public class FileSystemTemplateSource : ITemplateSource
{
public String BasePath { get; }
public bool Throws { get; }
Dictionary<string, TemplateDocument> templateDocuments = new Dictionary<string, TemplateDocument>();
public FileSystemTemplateSource(String path,bool throws)
:this(path)
{
Throws = throws;
}
public FileSystemTemplateSource(String path)
{
if (!Directory.Exists(path))
throw new FileNotFoundException();
BasePath = path;
}
public TemplateDocument GetTemplateByPath(string path) => GetTemplateByPath(path, Throws);
public TemplateDocument GetTemplateByPath(string path,bool _throw)
{
string templatePath = Path.Combine(BasePath, path);
if (!File.Exists(templatePath))
{
if (templateDocuments.ContainsKey(path))
templateDocuments.Remove(path);
if (_throw)
throw new FileNotFoundException();
return null;
}
if (!templateDocuments.TryGetValue(path,out TemplateDocument templateDocument))
{
templateDocument = ReadTemplateDocument(path);
templateDocuments[path] = templateDocument;
} else
{
DateTime templateDateTime = File.GetLastWriteTime(templatePath);
if (templateDateTime.Ticks != templateDocument.TemplateVersion)
{
templateDocument = ReadTemplateDocument(path);
templateDocuments[path] = templateDocument;
}
}
return templateDocument;
}
TemplateDocument ReadTemplateDocument(string path)
{
string templatePath = Path.Combine(BasePath, path);
TemplateReader templateReader = new TemplateReader();
using (StreamReader sr = new StreamReader(templatePath))
{
templateReader.Read(sr);
}
templateReader.TemplateDocument.TemplateVersion = File.GetLastWriteTime(templatePath).Ticks;
return templateReader.TemplateDocument;
}
}
}

6
ln.templates/html/HtmlReader.cs
View File

@ -13,7 +13,7 @@ using System.Collections.Generic;
using System.Text;
namespace ln.templates.html
{
public class HtmlReader
public class HtmlReader
{
public HtmlReader()
{
@ -124,7 +124,7 @@ namespace ln.templates.html
}
void ReadLWS(TextReader textReader) => ReadToken(textReader, char.IsWhiteSpace);
public string ReadTagName(TextReader textReader) => ReadTokenLWS(textReader, (ch) => char.IsLetterOrDigit(ch));
public string ReadTagName(TextReader textReader) => ReadTokenLWS(textReader, (ch) => char.IsLetterOrDigit(ch) || (ch == '-'));
public string ReadAttributeName(TextReader textReader) => ReadTokenLWS(textReader, (ch) => !char.IsWhiteSpace(ch) && (ch != '\0') && (ch != '"') && (ch != '\'') && (ch != '>') && (ch != '/') && (ch != '='));
public string ReadAttributeValue(TextReader textReader)
{
@ -147,7 +147,7 @@ namespace ln.templates.html
public void ReadText(TextReader textReader)
{
StringBuilder stringBuilder = new StringBuilder();
while (textReader.Peek() != '<')
while ((textReader.Peek() >= 0) && (textReader.Peek() != '<'))
stringBuilder.Append((char)textReader.Read());
Text(stringBuilder.ToString());

11
ln.templates/html/ITemplateSource.cs
View File

@ -1,11 +0,0 @@
using System;
using System.Collections.Generic;
using System.Text;
namespace ln.templates.html
{
public interface ITemplateSource
{
TemplateDocument GetTemplateByPath(string path);
}
}

39
ln.templates/html/RenderContext.cs
View File

@ -1,39 +0,0 @@
// /**
// * File: RenderContext.cs
// * Author: haraldwolff
// *
// * This file and it's content is copyrighted by the Author and / or copyright holder.
// * Any use wihtout proper permission is illegal and may lead to legal actions.
// *
// *
// **/
using System;
using System.IO;
using System.Collections.Generic;
using ln.templates.script;
namespace ln.templates.html
{
public class RenderContext : IScriptContext
{
public TextWriter ContentWriter { get; }
public ITemplateSource TemplateSource { get; set; }
Dictionary<string, object> scriptObjects = new Dictionary<string, object>();
public IEnumerable<string> ScriptObjectNames => scriptObjects.Keys;
public RenderContext(TextWriter contentWriter)
{
ContentWriter = contentWriter;
}
public RenderContext(TextWriter contentWriter,ITemplateSource templateSource)
:this(contentWriter)
{
TemplateSource = templateSource;
}
Dictionary<string, object> values = new Dictionary<string, object>();
public object GetScriptObject(string itemName) => scriptObjects[itemName];
public void SetScriptObject(string itemName, object value) => scriptObjects[itemName] = value;
}
}

24
ln.templates/html/TemplateDocument.cs
View File

@ -13,30 +13,22 @@ namespace ln.templates.html
{
public class TemplateDocument : DocumentElement
{
public long TemplateVersion { get; set; }
public TemplateDocument()
{
}
public void RenderTemplate(TextWriter contentWriter) => RenderTemplate(new RenderContext(contentWriter));
public void RenderTemplate(RenderContext renderContext,bool withoutDocType = false)
public void RenderTemplate(Context renderContext)
{
if (!withoutDocType)
renderContext.ContentWriter.Write("<!DOCTYPE html>");
if (DocType is not null)
renderContext.TargetWriter.Write("<!DOCTYPE {0}>", DocType);
foreach (Element element in Children)
foreach (var child in Children)
{
if (element is TemplateElement templateElement)
{
if (child is TemplateElement templateElement)
templateElement.RenderTemplate(renderContext);
} else
{
renderContext.ContentWriter.Write(element.ToString());
}
else
child.Render(renderContext.TargetWriter);
}
renderContext.ContentWriter.Flush();
}
}
}

23
ln.templates/html/TemplateElement.SlotElement.cs 100644
View File

@ -0,0 +1,23 @@
namespace ln.templates.html;
public partial class TemplateElement
{
private class SlotElement : TemplateElement
{
public SlotElement(string tagName)
:base(tagName){}
public string Name => GetAttribute("name", "");
public override void RenderElement(Context renderContext)
{
if (renderContext.TryGetSlot(Name, out Element slot))
{
RenderElements(new Context(renderContext), new []{ slot });
}
else
{
RenderElements(new Context(renderContext), Children);
}
}
}
}

250
ln.templates/html/TemplateElement.cs
View File

@ -10,24 +10,33 @@
using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using Jint.Native;
using Jint.Native.Object;
using ln.templates.script;
namespace ln.templates.html
{
public class TemplateElement : Element
public partial class TemplateElement : Element
{
private static string[] hiddenTags = new[] { "template", "slot" };
Dictionary<string, NewExpression> expressions = new Dictionary<string, NewExpression>();
Dictionary<string, NewExpression> loops = new Dictionary<string, NewExpression>();
List<NewExpression> conditions = new List<NewExpression>();
NewExpression includeExpression;
private Dictionary<string, Element> _slots = new Dictionary<string, Element>();
private NewExpression classExpression;
bool hideTag;
public TemplateElement(string tagName)
:base(tagName)
{
hideTag = "template".Equals(tagName.ToLower());
hideTag = hiddenTags.Contains(tagName.ToLower());
}
public override void SetAttribute(string attributeName, string attributeValue)
@ -36,27 +45,50 @@ namespace ln.templates.html
loops.Add(attributeName.Substring(6), new NewExpression(attributeValue));
else if (attributeName.Equals("v-if", StringComparison.InvariantCultureIgnoreCase))
conditions.Add(new NewExpression(attributeValue));
else if (attributeName.Equals("v-include", StringComparison.InvariantCultureIgnoreCase))
includeExpression = new NewExpression(attributeValue);
else if (attributeName.Equals(":class", StringComparison.InvariantCultureIgnoreCase))
classExpression = new NewExpression(attributeValue);
else if (attributeName.StartsWith("::"))
base.SetAttribute(attributeName, attributeValue);
else if (attributeName[0] == ':')
expressions.Add(attributeName.Substring(1), new NewExpression(attributeValue));
else
base.SetAttribute(attributeName, attributeValue);
}
public virtual void RenderTemplate(RenderContext renderContext)
public void SetSlot(string slotName, Element slotElement)
{
if (loops.Count == 0)
{
RenderElement(renderContext);
} else
{
Stack<KeyValuePair<string, NewExpression>> loopStack = new Stack<KeyValuePair<string, NewExpression>>(loops);
DoLoop(renderContext, loopStack);
}
_slots.Add(slotName, slotElement);
}
/**
* This is the render method to be called from external callers
*/
public virtual void RenderTemplate(Context renderContext)
{
if (loops.Count == 0)
{
RenderElement(renderContext);
}
else
{
Stack<KeyValuePair<string, NewExpression>> loopStack =
new Stack<KeyValuePair<string, NewExpression>>(loops);
DoLoop(renderContext, loopStack);
}
}
void DoLoop(RenderContext renderContext, Stack<KeyValuePair<string, NewExpression>> loopStack)
private Template TemplateFromExpression(Context renderContext, NewExpression expression)
{
object templateValue = expression.Resolve(renderContext.Engine);
if (!(templateValue is Template template))
{
template = renderContext.Resolver.GetTemplateByPath((string)templateValue);
}
return template;
}
protected virtual void DoLoop(Context renderContext, Stack<KeyValuePair<string, NewExpression>> loopStack)
{
if (loopStack.Count == 0)
{
@ -64,77 +96,193 @@ namespace ln.templates.html
} else
{
KeyValuePair<string, NewExpression> loop = loopStack.Pop();
IEnumerable enumerable = (IEnumerable)loop.Value.Resolve(renderContext);
foreach (object o in enumerable)
IEnumerable enumerable = (IEnumerable)loop.Value.Resolve(renderContext.Engine);
if (enumerable != null)
{
renderContext.SetScriptObject(loop.Key, o);
DoLoop(renderContext, loopStack);
bool hadBinding = renderContext.Engine.Realm.GlobalEnv.HasBinding(loop.Key);
JsValue _save = null;
if (hadBinding)
_save = renderContext.Engine.Realm.GlobalEnv.GetBindingValue(loop.Key, false);
try
{
foreach (object o in enumerable)
{
renderContext.Engine.SetValue(loop.Key, o);
DoLoop(renderContext, loopStack);
}
}
finally
{
if (hadBinding)
renderContext.Engine.Realm.GlobalEnv.SetMutableBinding(loop.Key, _save, false);
else
renderContext.Engine.Realm.GlobalEnv.DeleteBinding(loop.Key);
}
}
loopStack.Push(loop);
}
}
void RenderElement(RenderContext renderContext)
/**
* This is the render method to be called to render the element itself (tag, attributes, children, ... )
*/
public virtual void RenderElement(Context renderContext)
{
if (checkConditions(renderContext))
{
if (includeExpression != null)
if (TryGetAttribute(renderContext, "v-include", out string templatePath))
{
object includeValue = includeExpression.Resolve(renderContext);
if (!(includeValue is TemplateDocument includeTemplate))
{
includeTemplate = renderContext.TemplateSource.GetTemplateByPath((string)includeValue);
}
includeTemplate.RenderTemplate(renderContext, true);
Template template = renderContext.Resolver.GetTemplateByPath(templatePath);
Context context = new Context(renderContext);
if (this._slots.Count == 0)
context.SetSlot("", this);
else
context.SetSlots(this._slots);
template.Render(context);
}
else
{
if (!hideTag)
{
renderContext.ContentWriter.Write("<{0}", Name);
foreach (KeyValuePair<String, String> attributePair in Attributes)
renderContext.ContentWriter.Write(" {0}=\"{1}\"", attributePair.Key, attributePair.Value);
foreach (KeyValuePair<string,NewExpression> keyValuePair in expressions)
object classObject = null;
if (classExpression is not null)
{
object value = keyValuePair.Value.Resolve(renderContext);
if (value != null)
classObject = renderContext.Engine.Evaluate("(function(){ return " + classExpression
.ExpressionText + ";})()");
}
renderContext.TargetWriter.Write("<{0}", Name);
foreach (KeyValuePair<String, String> attributePair in Attributes)
{
if (attributePair.Key.Equals("class") && (classObject is ObjectInstance classObjectInstance))
{
renderContext.ContentWriter.Write(" {0}=\"{1}\"", keyValuePair.Key, value);
StringBuilder valueBuilder = new StringBuilder(attributePair.Value);
foreach (var property in classObjectInstance.GetOwnProperties())
{
if ((property.Value.Value is JsBoolean jsBooleanValue) &&
jsBooleanValue.Equals(JsBoolean.True))
valueBuilder.AppendFormat(" {0}", property.Key.ToString());
}
renderContext.TargetWriter.Write(" {0}=\"{1}\"", attributePair.Key,
valueBuilder.ToString());
}
else
{
renderContext.TargetWriter.Write(" {0}=\"{1}\"", attributePair.Key,
attributePair.Value);
}
}
renderContext.ContentWriter.Write(">");
foreach (KeyValuePair<string,NewExpression> keyValuePair in expressions)
{
object value = keyValuePair.Value.Resolve(renderContext.Engine);
if (value != null)
{
renderContext.TargetWriter.Write(" {0}=\"{1}\"", keyValuePair.Key, value);
}
}
renderContext.TargetWriter.Write(">");
}
if (!IsVoid)
{
foreach (Element element in Children)
{
if (element is TemplateElement templateElement)
{
templateElement.RenderTemplate(renderContext);
}
else
{
renderContext.ContentWriter.Write(element.ToString());
}
}
RenderElements(renderContext, Children);
if (!hideTag)
renderContext.ContentWriter.Write("</{0}>", Name);
renderContext.TargetWriter.Write("</{0}>", Name);
}
}
}
}
bool checkConditions(RenderContext renderContext)
public string GetAttribute(Context context, string attributeName)
{
if (expressions.TryGetValue(attributeName, out NewExpression expression))
return expression.Resolve(context.Engine).ToString();
return GetAttribute(attributeName);
}
public bool TryGetAttribute(Context context, string attributeName, out string attributeValue)
{
if (expressions.TryGetValue(attributeName, out NewExpression expression))
{
attributeValue = expression.Resolve(context.Engine).ToString();
return true;
}
else if (HasAttribute(attributeName))
{
attributeValue = GetAttribute(attributeName);
return true;
}
attributeValue = null;
return false;
}
protected void RenderElements(Context renderContext, IEnumerable<Element> elements)
{
foreach (Element element in elements)
{
if (element is TemplateElement templateElement)
{
templateElement.RenderTemplate(renderContext);
}
else
{
renderContext.TargetWriter.Write(element.ToString());
}
}
}
bool checkConditions(Context renderContext)
{
foreach (NewExpression condition in conditions)
if (!condition.IsTrue(renderContext))
if (!condition.IsTrue(renderContext.Engine))
return false;
return true;
}
class TemplateScriptElement : TemplateElement
{
private StringBuilder scriptBuilder = new StringBuilder();
public TemplateScriptElement()
: base("template-script")
{
}
public override void AppendChild(Element element)
{
if (element is TextElement textElement)
{
scriptBuilder.Append(textElement.Text);
}
else
{
throw new NotSupportedException();
}
}
public override void RenderElement(Context renderContext) =>
renderContext.Engine.Execute(scriptBuilder.ToString());
}
public static TemplateElement Create(string tagName)
{
switch (tagName)
{
case "slot":
return new SlotElement(tagName);
case "template-script":
return new TemplateScriptElement();
default:
return new TemplateElement(tagName);
}
}
}
}

70
ln.templates/html/TemplateReader.cs
View File

@ -1,70 +0,0 @@
// /**
// * File: TemplateReader.cs
// * Author: haraldwolff
// *
// * This file and it's content is copyrighted by the Author and / or copyright holder.
// * Any use wihtout proper permission is illegal and may lead to legal actions.
// *
// *
// **/
using System;
using System.IO;
namespace ln.templates.html
{
public class TemplateReader : ElementReader
{
public virtual TemplateDocument TemplateDocument => Document as TemplateDocument;
public TemplateReader()
{
}
public override DocumentElement CreateDocument() => new TemplateDocument();
public override Element CreateElement(string tagName) => new TemplateElement(tagName);
public override void Text(string text)
{
if (text.Contains("{{"))
{
int pOpen = 0;
int pClose = 0;
while (pOpen < text.Length)
{
pOpen = text.IndexOf("{{", pClose);
if (pOpen == -1)
pOpen = text.Length;
string preText = text.Substring(pClose, pOpen - pClose);
if (preText.Length > 0)
{
CurrentElement.AppendChild(CreateTextElement(preText));
}
if (pOpen == text.Length)
break;
pOpen += 2;
pClose = text.IndexOf("}}", pOpen);
if (pClose == -1)
throw new FormatException("missing }}");
string expr = text.Substring(pOpen, pClose - pOpen - 1);
pClose += 2;
CurrentElement.AppendChild(new ExpressionElement(expr));
}
} else
{
CurrentElement.AppendChild(
CreateTextElement(text)
);
}
}
}
}

7
ln.templates/ln.templates.csproj
View File

@ -1,7 +1,10 @@
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<TargetFramework>netcoreapp3.1</TargetFramework>
<PackageVersion>0.4.2</PackageVersion>
<TargetFrameworks>net5.0;net6.0</TargetFrameworks>
<LangVersion>default</LangVersion>
<GeneratePackageOnBuild>true</GeneratePackageOnBuild>
</PropertyGroup>
<PropertyGroup>
<Version>0.2.1-ci</Version>
@ -13,7 +16,7 @@
</PropertyGroup>
<ItemGroup>
<PackageReference Include="Jint" Version="2.11.58" />
<PackageReference Include="Jint" Version="3.0.0-preview-288" />
</ItemGroup>
</Project>

6
ln.templates/script/IScriptContext.cs
View File

@ -9,12 +9,12 @@
// **/
using System;
using System.Collections.Generic;
using Jint;
namespace ln.templates.script
{
public interface IScriptContext
{
IEnumerable<string> ScriptObjectNames { get; }
object GetScriptObject(string itemName);
void SetScriptObject(string itemName, object value);
Engine GetEngine();
}
}

22
ln.templates/script/NewExpression.cs
View File

@ -9,8 +9,6 @@
// **/
using System;
using Jint;
using Jint.Native;
using Jint.Native.String;
namespace ln.templates.script
{
@ -18,26 +16,20 @@ namespace ln.templates.script
{
public string ExpressionText { get; }
public NewExpression(string expression)
{
ExpressionText = expression;
}
public virtual object Resolve(IScriptContext scriptContext)
public virtual object Resolve() => Resolve(new Engine());
public virtual object Resolve(Engine engine) =>
engine.Evaluate(ExpressionText).ToObject();
public virtual bool IsTrue() => IsTrue(new Engine());
public virtual bool IsTrue(Engine engine)
{
Engine engine = new Engine();
foreach (string itemName in scriptContext.ScriptObjectNames)
engine.SetValue(itemName, scriptContext.GetScriptObject(itemName));
JsValue jsv = engine.Eval.Call(null, new Jint.Native.JsValue[] { ExpressionText });
return jsv.ToObject();
}
public virtual bool IsTrue(IScriptContext scriptContext)
{
object resolved = Resolve(scriptContext);
object resolved = Resolve(engine);
if (resolved == null)
return false;
if (resolved is bool b)

20
ln.templates/streams/CharStream.cs
View File

@ -1,20 +0,0 @@
using System;
using System.Text;
namespace ln.templates.streams
{
public class CharStream : PeekAbleStream<char>
{
public CharStream(char[] buffer)
:base(buffer)
{
}
public CharStream(byte[] byteBuffer, Encoding encoding)
: this(encoding.GetChars(byteBuffer))
{
}
public CharStream(byte[] byteBuffer)
:this(Encoding.UTF8.GetChars(byteBuffer))
{
}
}
}

50
ln.templates/streams/PeekableStream.cs
View File

@ -1,50 +0,0 @@
using System;
using System.Text;
namespace ln.templates.streams
{
public class PeekAbleStream<T>
{
private T[] buffer;
private int position;
public int Position => position;
public bool EndOfBuffer => (position >= buffer.Length);
public int MarkedPosition { get; set; }
public PeekAbleStream(T[] buffer)
{
this.buffer = buffer;
}
public T Read(){
if (position < buffer.Length)
return buffer[position++];
throw new IndexOutOfRangeException("Tried to read after end of buffer");
}
public T Peek(int shift = 0)
{
if ((position + shift) < buffer.Length)
return buffer[position + shift];
throw new IndexOutOfRangeException("Tried to peek after end of buffer");
}
public void Mark()
{
MarkedPosition = position;
}
public T[] GetMarkedIntervall()
{
T[] intervall = new T[position - MarkedPosition];
Array.Copy(buffer, MarkedPosition, intervall, 0, intervall.Length);
return intervall;
}
public int Remaining => buffer.Length - position;
}
}