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POHow to write a Visual Studio extension for a template or markup language that supports embedded code snippets
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copied!<p>Is it possible to write an extension for Visual Studio 2010 that provides syntax highlighting, intellisense, outlining, etc <strong>for a custom template or markup language supporting embedded code snippets</strong>, similar to the tooling for Razor in ASP .NET MVC 3? Can this be done without using private APIs, without access to Microsoft-internal documentation and, <em>most importantly</em>, <strong>without having to reimplement syntax highlighting, intellisense, etc. for the embedded programming language</strong> (i.e. C# or VB)?</p> <p>The SDK documentation <a href="http://msdn.microsoft.com/en-us/library/dd885240.aspx#projection" rel="noreferrer">seems to suggest</a> that the Visual Studio editor supports embedded languages via <a href="http://msdn.microsoft.com/en-us/library/microsoft.visualstudio.text.projection.aspx" rel="noreferrer"><strong><em>projection buffers</em></strong></a>, but it doesn't really give any details or examples. Some of the "legacy interop interfaces used for the editor and language services" in <a href="http://msdn.microsoft.com/en-us/library/microsoft.visualstudio.textmanager.interop.aspx" rel="noreferrer">Microsoft.VisualStudio.TextManager.Interop</a> also seem to be relevant, e.g. <a href="http://msdn.microsoft.com/en-us/library/microsoft.visualstudio.textmanager.interop.ivstextbuffercoordinator.aspx" rel="noreferrer">IVsTextBufferCoordinator</a>, but the documentation doesn't say much about how all these pieces fit together. </p> <p>Provided that projection buffers actually do what I hope, where can I hook into the editor to replace a normal text buffer with a projection buffer?</p> <p>Does maybe anyone have more information on the APIs relevant for supporting embedded languages or could point me into the right direction?</p>

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