- Added APIs to retrieve an `ITextBuffer` from a `Document` and to retrieve a `RazorCodeDocument` from an `ITextBuffer`.
- The `RazorCodeDocument` from `ITextBuffer` API supports both the new and old Razor parsers so we can transition seamlessly between the two.
- Added logic in the `RazorDirectiveCompletionProvider` to consume descriptions from `DirectiveDescriptor`s. This is then surfaced via tooltips.
- Retrieved currently active `RazorCodeDocument` given a Roslyn buffer and harvested all directives to display in the completion list.
- Added unit tests to validate each new services functionality.
#291
- Prior to this imported `@page` directives would flow through the Razor system without error. This resulted in inconsistent behavior between MVC and Razor. Now, imported `@page` directives result in diagnostics on the page directive node.
- Added two tests to verify that we still treat views with imported page directives as Razor pages BUT we also log a diagnostic on the page directive node.
- Renamed the `ViewComponentDiagnosticFactory` class to `RazorExtensionsDiagnosticFactory` so it can be used for more than just view component diagnostics. This way we can ensure that our diagnostics don't end up overlapping.
#1503