One part should implement getting compilation errors and generating an AST, and another part should be parsing symbols, references, etc from a given AST.

https://github.com/Microsoft/language-server-protocol/blob/master/protocol.md#completion-request

Right now they are published all together with the workspace URI.

Ex:
SomeObject obj = SomeObject.SOMETHING
Be able to find SomeObject on the right when trying to find references for this type.

https://github.com/Microsoft/language-server-protocol/blob/master/protocol.md#document-highlights-request

It should take into account the changes specified in TextDocumentContentChangeEvent

They should be set to their own location

https://github.com/Microsoft/language-server-protocol/blob/master/protocol.md#hover-request

https://github.com/Microsoft/language-server-protocol/blob/master/protocol.md#rename-request

https://github.com/Microsoft/language-server-protocol/blob/master/protocol.md#signature-help-request

https://github.com/Microsoft/language-server-protocol/blob/master/protocol.md#goto-definition-request

https://github.com/Microsoft/language-server-protocol/blob/master/protocol.md#find-references

https://github.com/Microsoft/language-server-protocol/blob/master/protocol.md#workspace-symbols

Example highlighting files for other languages:
https://github.com/Microsoft/monaco-languages/tree/master/src

https://github.com/Microsoft/language-server-protocol/blob/master/protocol.md#code-action-request

This would fix the ugly exception being caught when the source of the diagnostic is default (groovyc), and would stop relying on source being an URI, which it doesn't have to be.

https://github.com/palantir/groovy-language-server/blob/develop/groovy-language-server/src/main/java/com/palantir/ls/groovy/GroovyLanguageServerState.java#L115

Ex: Diagnostic uri

https://github.com/Microsoft/language-server-protocol/blob/master/protocol.md#didchangewatchedfiles-notification

Locally declared variables in methods are not added to symbols.
Ex:

int getAt(int idx) {
    def something = "Hello"
    return idx
}

idx is found but something is not

This will be a problem when we implement find all references, and when we want to find the correct AST node for a position.

https://github.com/Microsoft/language-server-protocol/blob/master/protocol.md#document-on-type-formatting-request
Related to #15

If we are saving the changes from didChange in some way, we should reset any "dirty" changes when we close the document without saving it.

Related to #19

https://github.com/Microsoft/language-server-protocol/blob/master/protocol.md#didchangeconfiguration-notification

https://github.com/Microsoft/language-server-protocol/blob/master/protocol.md#logmessage-notification

TypeFox/ls-api#38

https://github.com/Microsoft/language-server-protocol/blob/master/protocol.md#document-formatting-request

Right now it is triggered when the client sends any of these:

• didChangeWatchedFiles
• didOpen
• didChange
• didClose
• didSave

But is it weird behavior that you don't get compilation errors until you do one of these? For example, you should be able to get workspace symbols without opening a file. What is the expected workflow from the client after initializing? If it is expected that they would send a didChangeWatchedFiles at the start then it wouldn't be a problem.

https://github.com/Microsoft/language-server-protocol/blob/master/protocol.md#document-symbols

Currently the groovy language server only works with .groovy files, but we should set the jointCompilation configuration in compilationConfiguration to make it work with Java too.
https://github.com/apache/groovy/blob/master/src/main/org/codehaus/groovy/control/CompilerConfiguration.java#L155

Depends on apache/groovy#370

When it is released

https://github.com/Microsoft/language-server-protocol/blob/master/protocol.md#document-range-formatting-request

https://github.com/Microsoft/language-server-protocol/blob/master/protocol.md#code-lens-request