public void GetElementCompletions_CapturesAllAllowedChildTagsFromParentTagHelpers_SomeTagHelpers()
{
// Arrange
var documentDescriptors = new[]
{
TagHelperDescriptorBuilder.Create("BoldParent", "TestAssembly")
.TagMatchingRuleDescriptor(rule => rule.RequireTagName("div"))
.AllowChildTag("b")
.AllowChildTag("bold")
.AllowChildTag("div")
.Build(),
};
var expectedCompletions = ElementCompletionResult.Create(new Dictionary <string, HashSet <TagHelperDescriptor> >()
{
["b"] = new HashSet <TagHelperDescriptor>(),
["bold"] = new HashSet <TagHelperDescriptor>(),
["div"] = new HashSet <TagHelperDescriptor> {
documentDescriptors[0]
}
});
var completionContext = BuildElementCompletionContext(documentDescriptors, Enumerable.Empty <string>(), containingTagName: "div");
var service = CreateTagHelperCompletionFactsService();
// Act
var completions = service.GetElementCompletions(completionContext);
// Assert
AssertCompletionsAreEquivalent(expectedCompletions, completions);
}
public void GetElementCompletions_EnsuresDescriptorsHaveSatisfiedParent()
{
// Arrange
var documentDescriptors = new[]
{
TagHelperDescriptorBuilder.Create("LiTagHelper1", "TestAssembly")
.TagMatchingRuleDescriptor(rule => rule.RequireTagName("li"))
.Build(),
TagHelperDescriptorBuilder.Create("LiTagHelper2", "TestAssembly")
.TagMatchingRuleDescriptor(rule => rule.RequireTagName("li").RequireParentTag("ol"))
.Build(),
};
var expectedCompletions = ElementCompletionResult.Create(new Dictionary <string, HashSet <TagHelperDescriptor> >()
{
["li"] = new HashSet <TagHelperDescriptor> {
documentDescriptors[0]
},
});
var existingCompletions = new[] { "li" };
var completionContext = BuildElementCompletionContext(documentDescriptors, existingCompletions, containingTagName: "ul");
var service = CreateTagHelperCompletionFactsService();
// Act
var completions = service.GetElementCompletions(completionContext);
// Assert
AssertCompletionsAreEquivalent(expectedCompletions, completions);
}
public void GetElementCompletions_AllowedChildrenAreIgnoredWhenAtRoot()
{
// Arrange
var documentDescriptors = new[]
{
TagHelperDescriptorBuilder.Create("CatchAll", "TestAssembly")
.TagMatchingRuleDescriptor(rule => rule.RequireTagName("*"))
.AllowChildTag("b")
.AllowChildTag("bold")
.AllowChildTag("div")
.Build(),
};
var expectedCompletions = ElementCompletionResult.Create(new Dictionary <string, HashSet <TagHelperDescriptor> >());
var existingCompletions = Enumerable.Empty <string>();
var completionContext = BuildElementCompletionContext(
documentDescriptors,
existingCompletions,
containingTagName: null,
containingParentTagName: null);
var service = CreateTagHelperCompletionFactsService();
// Act
var completions = service.GetElementCompletions(completionContext);
// Assert
AssertCompletionsAreEquivalent(expectedCompletions, completions);
}
public void GetElementCompletions_OutputHintIsCrossReferencedWithExistingCompletions()
{
// Arrange
var documentDescriptors = new[]
{
TagHelperDescriptorBuilder.Create("DivTagHelper", "TestAssembly")
.TagMatchingRuleDescriptor(rule => rule.RequireTagName("div"))
.TagOutputHint("li")
.Build(),
TagHelperDescriptorBuilder.Create("LiTagHelper", "TestAssembly")
.TagMatchingRuleDescriptor(rule => rule.RequireTagName("li"))
.TagOutputHint("strong")
.Build(),
};
var expectedCompletions = ElementCompletionResult.Create(new Dictionary <string, HashSet <TagHelperDescriptor> >()
{
["div"] = new HashSet <TagHelperDescriptor> {
documentDescriptors[0]
},
["li"] = new HashSet <TagHelperDescriptor> {
documentDescriptors[1]
},
});
var existingCompletions = new[] { "li" };
var completionContext = BuildElementCompletionContext(documentDescriptors, existingCompletions, containingTagName: "ul");
var service = CreateTagHelperCompletionFactsService();
// Act
var completions = service.GetElementCompletions(completionContext);
// Assert
AssertCompletionsAreEquivalent(expectedCompletions, completions);
}
public void GetElementCompletions_CatchAllsApplyToOnlyTagHelperCompletions()
{
// Arrange
var documentDescriptors = new[]
{
TagHelperDescriptorBuilder.Create("SuperLiTagHelper", "TestAssembly")
.TagMatchingRuleDescriptor(rule => rule.RequireTagName("superli"))
.Build(),
TagHelperDescriptorBuilder.Create("CatchAll", "TestAssembly")
.TagMatchingRuleDescriptor(rule => rule.RequireTagName("*"))
.Build(),
};
var expectedCompletions = ElementCompletionResult.Create(new Dictionary <string, HashSet <TagHelperDescriptor> >()
{
["superli"] = new HashSet <TagHelperDescriptor>()
{
documentDescriptors[0], documentDescriptors[1]
},
["li"] = new HashSet <TagHelperDescriptor>(),
});
var existingCompletions = new[] { "li" };
var completionContext = BuildElementCompletionContext(
documentDescriptors,
existingCompletions,
containingTagName: "ul");
var service = CreateTagHelperCompletionFactsService();
// Act
var completions = service.GetElementCompletions(completionContext);
// Assert
AssertCompletionsAreEquivalent(expectedCompletions, completions);
}
private static void AssertCompletionsAreEquivalent(ElementCompletionResult expected, ElementCompletionResult actual)
{
Assert.Equal(expected.Completions.Count, actual.Completions.Count);
foreach (var expectedCompletion in expected.Completions)
{
var actualValue = actual.Completions[expectedCompletion.Key];
Assert.NotNull(actualValue);
Assert.Equal(expectedCompletion.Value, actualValue, TagHelperDescriptorComparer.CaseSensitive);
}
}
public void GetElementCompletions_AllowsMultiTargetingTagHelpers()
{
// Arrange
var documentDescriptors = new[]
{
TagHelperDescriptorBuilder.Create("BoldTagHelper1", "TestAssembly")
.TagMatchingRuleDescriptor(rule => rule.RequireTagName("strong"))
.TagMatchingRuleDescriptor(rule => rule.RequireTagName("b"))
.TagMatchingRuleDescriptor(rule => rule.RequireTagName("bold"))
.Build(),
TagHelperDescriptorBuilder.Create("BoldTagHelper2", "TestAssembly")
.TagMatchingRuleDescriptor(rule => rule.RequireTagName("strong"))
.Build(),
};
var expectedCompletions = ElementCompletionResult.Create(new Dictionary <string, HashSet <TagHelperDescriptor> >()
{
["strong"] = new HashSet <TagHelperDescriptor> {
documentDescriptors[0], documentDescriptors[1]
},
["b"] = new HashSet <TagHelperDescriptor> {
documentDescriptors[0]
},
["bold"] = new HashSet <TagHelperDescriptor> {
documentDescriptors[0]
},
});
var existingCompletions = new[] { "strong", "b", "bold" };
var completionContext = BuildElementCompletionContext(
documentDescriptors,
existingCompletions,
containingTagName: "ul");
var service = CreateTagHelperCompletionFactsService();
// Act
var completions = service.GetElementCompletions(completionContext);
// Assert
AssertCompletionsAreEquivalent(expectedCompletions, completions);
}
public void GetElementCompletions_TagOutputHintDoesNotFallThroughToSchemaCheck()
{
// Arrange
var documentDescriptors = new[]
{
TagHelperDescriptorBuilder.Create("MyTableTagHelper", "TestAssembly")
.TagMatchingRuleDescriptor(rule => rule.RequireTagName("my-table"))
.TagOutputHint("table")
.Build(),
TagHelperDescriptorBuilder.Create("MyTrTagHelper", "TestAssembly")
.TagMatchingRuleDescriptor(rule => rule.RequireTagName("my-tr"))
.TagOutputHint("tr")
.Build(),
};
var expectedCompletions = ElementCompletionResult.Create(new Dictionary <string, HashSet <TagHelperDescriptor> >()
{
["my-table"] = new HashSet <TagHelperDescriptor> {
documentDescriptors[0]
},
["table"] = new HashSet <TagHelperDescriptor>(),
});
var existingCompletions = new[] { "table" };
var completionContext = BuildElementCompletionContext(
documentDescriptors,
existingCompletions,
containingTagName: "body",
containingParentTagName: null);
var service = CreateTagHelperCompletionFactsService();
// Act
var completions = service.GetElementCompletions(completionContext);
// Assert
AssertCompletionsAreEquivalent(expectedCompletions, completions);
}
public override ElementCompletionResult GetElementCompletions(ElementCompletionContext completionContext)
{
if (completionContext == null)
{
throw new ArgumentNullException(nameof(completionContext));
}
var elementCompletions = new Dictionary <string, HashSet <TagHelperDescriptor> >(StringComparer.OrdinalIgnoreCase);
AddAllowedChildrenCompletions(completionContext, elementCompletions);
if (elementCompletions.Count > 0)
{
// If the containing element is already a TagHelper and only allows certain children.
var emptyResult = ElementCompletionResult.Create(elementCompletions);
return(emptyResult);
}
elementCompletions = completionContext.ExistingCompletions.ToDictionary(
completion => completion,
_ => new HashSet <TagHelperDescriptor>(),
StringComparer.OrdinalIgnoreCase);
var catchAllDescriptors = new HashSet <TagHelperDescriptor>();
var prefix = completionContext.DocumentContext.Prefix ?? string.Empty;
var possibleChildDescriptors = _tagHelperFactsService.GetTagHelpersGivenParent(completionContext.DocumentContext, completionContext.ContainingTagName);
foreach (var possibleDescriptor in possibleChildDescriptors)
{
var addRuleCompletions = false;
var outputHint = possibleDescriptor.TagOutputHint;
foreach (var rule in possibleDescriptor.TagMatchingRules)
{
if (rule.TagName == TagHelperMatchingConventions.ElementCatchAllName)
{
catchAllDescriptors.Add(possibleDescriptor);
}
else if (elementCompletions.ContainsKey(rule.TagName))
{
addRuleCompletions = true;
}
else if (outputHint != null)
{
// If the current descriptor has an output hint we need to make sure it shows up only when its output hint would normally show up.
// Example: We have a MyTableTagHelper that has an output hint of "table" and a MyTrTagHelper that has an output hint of "tr".
// If we try typing in a situation like this: <body > | </body>
// We'd expect to only get "my-table" as a completion because the "body" tag doesn't allow "tr" tags.
addRuleCompletions = elementCompletions.ContainsKey(outputHint);
}
else if (!completionContext.InHTMLSchema(rule.TagName))
{
// If there is an unknown HTML schema tag that doesn't exist in the current completion we should add it. This happens for
// TagHelpers that target non-schema oriented tags.
addRuleCompletions = true;
}
if (addRuleCompletions)
{
UpdateCompletions(prefix + rule.TagName, possibleDescriptor);
}
}
}
// We needed to track all catch-alls and update their completions after all other completions have been completed.
// This way, any TagHelper added completions will also have catch-alls listed under their entries.
foreach (var catchAllDescriptor in catchAllDescriptors)
{
foreach (var completionTagName in elementCompletions.Keys)
{
if (elementCompletions[completionTagName].Count > 0 ||
!string.IsNullOrEmpty(prefix) && completionTagName.StartsWith(prefix, StringComparison.OrdinalIgnoreCase))
{
// The current completion either has other TagHelper's associated with it or is prefixed with a non-empty
// TagHelper prefix.
UpdateCompletions(completionTagName, catchAllDescriptor);
}
}
}
var result = ElementCompletionResult.Create(elementCompletions);
return(result);
void UpdateCompletions(string tagName, TagHelperDescriptor possibleDescriptor)
{
if (!elementCompletions.TryGetValue(tagName, out var existingRuleDescriptors))
{
existingRuleDescriptors = new HashSet <TagHelperDescriptor>();
elementCompletions[tagName] = existingRuleDescriptors;
}
existingRuleDescriptors.Add(possibleDescriptor);
}
}