Completion should provide code snippets (sysout/syserr/...)

[ghost]

See image. This was reproduced on che.openshift.io but it seems that that doesn't make a difference.

[fbricon]

this is not a jdt.ls issue, as that snippet comes directly from vscode-java. It is pretty dumb and blindly injects the full snippet at the cursor location.
So I won't close it but instead will turn it into a "provide sysout/syserr snippets" enhancement request. We'll then be able to remove the dumb snippets on the vscode-java side.

[fbricon]

Would love to see systrace exposed to jdt.ls too: https://twitter.com/EclipseJavaIDE/status/1113723686148767744

[testforstephen]

The core template engine code is placed at jdt.ui bundle.

org.eclipse.jdt.internal.ui.text.template.contentassist.*
org.eclipse.jdt.internal.corext.template.java.*

To reuse it in jdt.ls, need refactor the upstream code first. Currently, the template code is mixed with some of ui logic, it takes a certain of effort to decouple the ui.

[testforstephen]

@jdneo is working on this.

[jdneo]

Yes I'm now moving the related code from ui to core.manipulation