fix(Manupilation): Adding nested Tag renames parent closing element #338

CompletionEngine/Avalonia.Ide.CompletionEngine/Parsing/XmlParser.cs

@@ -18,9 +18,10 @@ public enum ParserState
         BeforeAttributeValue,
         AttributeValue,
         AfterAttributeValue,
+        Error,
     }
 
-    public ParserState State { get; set; }
+    public ParserState State { get; private set; }
 
     private readonly ReadOnlyMemory<char> _data;
     private int _parserPos;
@@ -99,6 +100,7 @@ private bool ParseChar()
         var i = _parserPos++;
         var span = _data.Span;
         var c = span[i];
+        char lastChar;
         if (c == '<' && State == ParserState.None)
         {
             State = ParserState.StartElement;
@@ -168,6 +170,10 @@ private bool ParseChar()
             _attributeNameStart = i;
             _attributeNameEnd = null;
         }
+        else if (State == ParserState.InsideElement && c == '<')
+        {
+            State = ParserState.Error;
+        }
         else if (State == ParserState.StartAttribute && (c == '=' || char.IsWhiteSpace(c)))
         {
             State = ParserState.BeforeAttributeValue;
@@ -186,6 +192,11 @@ private bool ParseChar()
         {
             State = ParserState.InsideElement;
         }
+        else if (State == ParserState.Error && CheckPrev(i - 1, "<"))
+        {
+            State = ParserState.StartElement;
+            _parserPos--;
+        }
         return true;
     }
 
@@ -198,7 +209,6 @@ private bool ParseChar()
         if (m.Success)
             return m.Value.Substring(1);
         return null;
-
     }
 
     public string? FindParentAttributeValue(string attributeExpr, int startLevel = 0, int maxLevels = int.MaxValue)
@@ -277,7 +287,11 @@ public static XmlParser Parse(ReadOnlyMemory<char> data)
 
     public static XmlParser Parse(ReadOnlyMemory<char> data, int start, int end)
     {
-        var rv = new XmlParser(data, start);
+        var rv = new XmlParser(data, 0);
+        while(rv.ParserPos < start)
+        {
+            rv.ParseChar();
+        }
         for (var i = start; i < end; i++)
         {
             if (!rv.ParseChar())
@@ -303,7 +317,8 @@ public bool SeekClosingTag()
             // leave initial start element
         }
 
-        while (NestingLevel != 0)
+        var currentLevel = NestingLevel;
+        while (NestingLevel >= currentLevel)
         {
             if (!ParseChar())
             {
@@ -321,7 +336,7 @@ public bool SeekClosingTag()
             // find start of next element
         }
 
-        return true;
+        return NestingLevel < currentLevel;
     }
 
     public override string ToString()

tests/CompletionEngineTests/Manipulator/ManipulatorBasicTests.SynchronizeStartAndEndTag.cs

@@ -0,0 +1,62 @@
+using Xunit;
+
+namespace CompletionEngineTests.Manipulator;
+
+partial class ManipulatorBasicTests
+{
+    const string nestingRenameSource = """
+<UserControl xmlns="https://github.com/avaloniaui"
+                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"
+                mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
+                x:Class="ACTest.Views.UserControl1">
+    <UserControl$
+    <TextBlock Text="Ciao"/>
+</UserControl>
+""";
+
+    const string nestingRenameExpected = """
+<UserControl xmlns="https://github.com/avaloniaui"
+                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"
+                mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
+                x:Class="ACTest.Views.UserControl1">
+    <UserControld
+    <TextBlock Text="Ciao"/>
+</UserControl>
+""";
+
+    const string scenario2Source = """
+<UserControl$ xmlns="https://github.com/avaloniaui"
+                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"
+                mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
+                x:Class="ACTest.Views.UserControl1">
+    <UserControl
+    <TextBlock Text="Ciao"/>
+</UserControl>
+""";
+
+    const string scenario2Expected = """
+<UserControld xmlns="https://github.com/avaloniaui"
+                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"
+                mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
+                x:Class="ACTest.Views.UserControl1">
+    <UserControl
+    <TextBlock Text="Ciao"/>
+</UserControld>
+""";
+
+    [Theory]
+    [Scenario("Adding nested Tag renames parent closing element  GitHub #338 ", nestingRenameExpected, nestingRenameSource)]
+    [Scenario("Rename with invalid nested tag", scenario2Expected, scenario2Source)]
+    public void SynchronizeStartAndEndTag(Scenario scenario)
+    {
+        AssertInsertion((string)scenario.Agrument, "d", (string)scenario.Expected);
+    }
+}

tests/CompletionEngineTests/Manipulator/ManipulatorBasicTests.cs

@@ -3,7 +3,7 @@
 namespace CompletionEngineTests.Manipulator
 {
 
-    public class ManipulatorBasicTests : ManipulatorTestBase
+    public partial class ManipulatorBasicTests : ManipulatorTestBase
     {
         [Fact]
         public void DoNotInsertToUnclosedTag()

tests/CompletionEngineTests/Manipulator/Util/ManipulatorTestBase.cs

@@ -1,6 +1,4 @@
-using System.Collections;
-using System.Collections.Generic;
-using System.Linq;
+using System.Collections.Generic;
 using Avalonia.Ide.CompletionEngine;
 using Xunit;
 

tests/CompletionEngineTests/Scenario.cs

@@ -0,0 +1,45 @@
+using System.Collections.Generic;
+using System.Reflection;
+using Xunit.Sdk;
+
+namespace CompletionEngineTests;
+
+/// <summary>
+///  Test Scenario
+/// </summary>
+/// <param name="Description"></param>
+/// <param name="Expected"></param>
+/// <param name="Agrument"></param>
+public record class Scenario(string Description, object Expected, object Agrument)
+{
+    public override string ToString()
+    {
+        return Description;
+    }
+}
+
+/// <summary>
+/// Provides a data source for a data theory, with the data coming from inline values.
+/// </summary>
+public sealed class ScenarioAttribute : DataAttribute
+{
+    readonly object[] data;
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="ScenarioAttribute"/> class.
+    /// </summary>
+    /// <param name="description">The description of test scenario</param>
+    /// <param name="expected">The expected value</param>
+    /// <param name="agrument">The argument of pass to test method.</param>
+    public ScenarioAttribute(string description, object expected, object agrument)
+    {
+        Scenario scenario = new(description, expected, agrument);
+        data = new object[] { scenario };
+    }
+
+    /// <inheritdoc/>
+    public override IEnumerable<object[]> GetData(MethodInfo testMethod)
+    {
+        yield return data;
+    }
+}