data context matching based on types: fixed few problems

src/Framework/Framework/Binding/BindingHelper.cs

@@ -97,7 +97,30 @@ internal static (int stepsUp, DotvvmBindableObject target) FindDataContextTarget
                 {
                     // only count changes which are visible client-side
                     // server-side context are not present in the client-side stack at all, so we need to skip them here
-                    changes++;
+
+                    // don't count changes which only extend the data context, but don't nest it
+
+                    var isNesting = ancestorContext.IsAncestorOf(lastAncestorContext);
+                    if (isNesting)
+                    {
+                        changes++;
+                    }
+#if DEBUG
+                    else if (!lastAncestorContext.DataContextType.IsAssignableFrom(ancestorContext.DataContextType))
+                    {
+                        // this should not happen - data context type should not randomly change without nesting.
+                        // we change data context stack when we get into different compilation context - a markup control
+                        // but that will be always the same viewmodel type (or supertype)
+
+                        var previousAncestor = control.GetAllAncestors(includingThis: true).TakeWhile(aa => aa != a).LastOrDefault();
+                        var config = (control.GetValue(Internal.RequestContextProperty) as Hosting.IDotvvmRequestContext)?.Configuration;
+                        throw new DotvvmControlException(
+                            previousAncestor ?? a,
+                            $"DataContext type changed from '{lastAncestorContext.DataContextType.ToCode()}' to '{ancestorContext.DataContextType.ToCode()}' without nesting. " +
+                            $"{previousAncestor?.DebugString(config)} has DataContext: {lastAncestorContext}, " +
+                            $"{a.DebugString(config)} has DataContext: {ancestorContext}");
+                    }
+#endif
                     lastAncestorContext = ancestorContext;
                 }
 

src/Framework/Framework/Compilation/ControlTree/DataContextStack.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Concurrent;
 using System.Collections.Generic;
 using System.Collections.Immutable;
@@ -108,6 +108,21 @@ public IEnumerable<Type> Parents()
             }
         }
 
+        public bool IsAncestorOf(DataContextStack x)
+        {
+            var c = x.Parent;
+            while (c != null)
+            {
+                if (this.hashCode == c.hashCode)
+                {
+                    if (this.Equals(c))
+                        return true;
+                }
+                c = c.Parent;
+            }
+            return false;
+        }
+
         ITypeDescriptor IDataContextStack.DataContextType => new ResolvedTypeDescriptor(DataContextType);
         IDataContextStack? IDataContextStack.Parent => Parent;
 

src/Samples/Tests/Tests/Complex/TaskListTests.cs

@@ -51,7 +51,7 @@ public void Complex_TaskList_ServerRenderedTaskList()
 
                 //add task
                 browser.SendKeys("input[type=text]", "DotVVM");
-                browser.Click("input[type=button]");
+                browser.Click("input[type=submit]");
 
                 browser.FindElements(".table tr").ThrowIfDifferentCountThan(4);
 

src/Tests/ControlTests/MarkupControlTests.cs

@@ -27,6 +27,7 @@ public class MarkupControlTests
             _ = Repeater.RenderAsNamedTemplateProperty;
             config.Resources.RegisterScriptModuleUrl("somemodule", "http://localhost:99999/somemodule.js", null);
             config.Markup.AddMarkupControl("cc", "CustomControl", "CustomControl.dotcontrol");
+            config.Markup.AddMarkupControl("cc", "CustomControlWithStaticCommand", "CustomControlWithStaticCommand.dotcontrol");
             config.Markup.AddMarkupControl("cc", "CustomControlWithCommand", "CustomControlWithCommand.dotcontrol");
             config.Markup.AddMarkupControl("cc", "CustomControlWithProperty", "CustomControlWithProperty.dotcontrol");
             config.Markup.AddMarkupControl("cc", "CustomControlWithInvalidVM", "CustomControlWithInvalidVM.dotcontrol");
@@ -68,14 +69,14 @@ public async Task MarkupControl_PassingStaticCommand()
         {
             var r = await cth.RunPage(typeof(BasicTestViewModel), @"
 
-                <cc:CustomControlWithCommand DataContext={value: Integer} Click={staticCommand: s.Save(_parent.Integer)} Another={value: _this} />
+                <cc:CustomControlWithStaticCommand DataContext={value: Integer} Click={staticCommand: s.Save(_parent.Integer)} Another={value: _this} />
                 <dot:Repeater DataSource={value: Collection}>
-                    <cc:CustomControlWithCommand Click={staticCommand: s.Save(_this)} Another={value: _root.Integer} />
+                    <cc:CustomControlWithStaticCommand Click={staticCommand: s.Save(_this)} Another={value: _root.Integer} />
                 </dot:Repeater>
                 ",
                 directives: $"@service s = {typeof(TestService)}",
                 markupFiles: new Dictionary<string, string> {
-                    ["CustomControlWithCommand.dotcontrol"] = @"
+                    ["CustomControlWithStaticCommand.dotcontrol"] = @"
                         @viewModel int
                         @baseType DotVVM.Framework.Tests.ControlTests.CustomControlWithCommand
                         @wrapperTag div
@@ -86,6 +87,30 @@ @wrapperTag div
             check.CheckString(r.FormattedHtml, fileExtension: "html");
         }
 
+        [TestMethod]
+        public async Task MarkupControl_CommandInRepeater()
+        {
+            var r = await cth.RunPage(typeof(BasicTestViewModel), @"
+
+                <cc:CustomControlWithCommand DataContext={value: Integer} Click={command: s.Save(_parent.Integer)} Another={value: _this} />
+                <dot:Repeater DataSource={value: Collection}>
+                    <cc:CustomControlWithCommand Click={command: s.Save(_this)} Another={value: _root.Integer} />
+                </dot:Repeater>
+                ",
+                directives: $"@service s = {typeof(TestService)}",
+                markupFiles: new Dictionary<string, string> {
+                    ["CustomControlWithCommand.dotcontrol"] = @"
+                        @viewModel int
+                        @baseType DotVVM.Framework.Tests.ControlTests.CustomControlWithCommand
+                        @wrapperTag div
+                        <dot:Button Click={command: _control.Click()} Text={resource: $'Button with number = {_control.Another}'} />"
+                }
+            );
+
+            check.CheckString(r.FormattedHtml, fileExtension: "html");
+        }
+
+
         [TestMethod]
         public async Task MarkupControl_UpdateSource()
         {

src/Tests/ControlTests/testoutputs/AutoUIFormTests.BootstrapFormTest.html

@@ -55,7 +55,7 @@
 				<ul data-bind="foreach: { data: $parent.Products()?.Items }" id="Products__input">
 					<li>
 						<label class="form-check-label">
-							<input class="form-check-input" data-bind="dotvvm-checkedItems: $parents[1].Products, checkedArrayContainsObservables: true, dotvvm-checkbox-updateAfterPostback: true, dotvvm-checked-pointer: 'dotvvm-checkedItems', checkedValue: Value" type="checkbox">
+							<input class="form-check-input" data-bind="dotvvm-checkedItems: $parent.Products, checkedArrayContainsObservables: true, dotvvm-checkbox-updateAfterPostback: true, dotvvm-checked-pointer: 'dotvvm-checkedItems', checkedValue: Value" type="checkbox">
 							<span data-bind="text: DisplayName"></span>
 						</label>
 					</li>

src/Tests/ControlTests/testoutputs/AutoUIFormTests.BulmaFormTest.html

@@ -86,7 +86,7 @@
 						<ul data-bind="dotvvm-validation: Products, dotvvm-validationOptions: { invalidCssClass: &quot;is-danger&quot;, setToolTipText: true }, foreach: { data: $parent.Products()?.Items }" id="Products__input">
 							<li>
 								<label class="checkbox">
-									<input data-bind="dotvvm-checkedItems: $parents[1].Products, checkedArrayContainsObservables: true, dotvvm-checkbox-updateAfterPostback: true, dotvvm-checked-pointer: 'dotvvm-checkedItems', checkedValue: Value" type="checkbox">
+									<input data-bind="dotvvm-checkedItems: $parent.Products, checkedArrayContainsObservables: true, dotvvm-checkbox-updateAfterPostback: true, dotvvm-checked-pointer: 'dotvvm-checkedItems', checkedValue: Value" type="checkbox">
 									<span data-bind="text: DisplayName"></span>
 								</label>
 							</li>

src/Tests/ControlTests/testoutputs/AutoUITests.Selections.html

@@ -29,7 +29,7 @@
 						<ul data-bind="foreach: { data: $parent.Countries()?.Items }" id="CountryId__input">
 							<li>
 								<label>
-									<input data-bind="dotvvm-checkedItems: $parents[1].CountryId, checkedArrayContainsObservables: true, dotvvm-checkbox-updateAfterPostback: true, dotvvm-checked-pointer: 'dotvvm-checkedItems', checkedValue: Value" type="checkbox">
+									<input data-bind="dotvvm-checkedItems: $parent.CountryId, checkedArrayContainsObservables: true, dotvvm-checkbox-updateAfterPostback: true, dotvvm-checked-pointer: 'dotvvm-checkedItems', checkedValue: Value" type="checkbox">
 									<span data-bind="text: DisplayName"></span>
 								</label>
 							</li>

src/Tests/ControlTests/testoutputs/MarkupControlTests.MarkupControl_CommandInRepeater.html

@@ -0,0 +1,16 @@
+<html>
+	<head></head>
+	<body>
+
+		<!-- ko with: int -->
+		<div>
+			<input onclick="dotvvm.postBack(this,[&quot;$parent.int&quot;],&quot;A0nd+6BTPk/xOJQH&quot;,&quot;c7&quot;,null,[],[],undefined).catch(dotvvm.log.logPostBackScriptError);event.stopPropagation();return false;" type="button" value="Button with number = 10000000">
+		</div>
+		<!-- /ko -->
+		<div data-bind="foreach: { data: Collection }">
+			<div>
+				<input onclick="dotvvm.postBack(this,[&quot;Collection/[$index]&quot;],&quot;A0nd+6BTPk/xOJQH&quot;,&quot;c9&quot;+'_'+ko.contextFor(this).$index()+'_'+&quot;c11&quot;,null,[],[],undefined).catch(dotvvm.log.logPostBackScriptError);event.stopPropagation();return false;" type="button" value="Button with number = 10000000">
+			</div>
+		</div>
+	</body>
+</html>

src/Tests/Runtime/testoutputs/RuntimeErrorTests.CantFindDataContextSpace.txt

@@ -1,2 +1,2 @@
-InvalidDataContextTypeException occurred: Could not find DataContext space of '{value: False}'. The DataContextType property of the binding does not correspond to DataContextType of the HtmlGenericControl nor any of its ancestors. Control's context is (type=System.String, par=[Int32]), binding's context is (type=System.String). Real data context types: .
+InvalidDataContextTypeException occurred: Could not find DataContext space of '{value: False}'. The DataContextType property of the binding does not correspond to DataContextType of the HtmlGenericControl nor any of its ancestors. Control's context is (type=string, par=[int]), binding's context is (type=string). Real data context types: .
     at object DotVVM.Framework.Controls.DotvvmBindableObject.EvalPropertyValue(DotvvmProperty property, object value)

src/Tests/Runtime/testoutputs/RuntimeErrorTests.DataContextStack_ToString.txt

@@ -1 +1 @@
-(type=System.Int32, imports=[import(System), import(Text=System.Text)], ext=[_index: Int32], par=[String, RuntimeErrorTests])
+(type=int, imports=[import(System), import(Text=System.Text)], ext=[_index: Int32], par=[string, RuntimeErrorTests])