Refactor when moving files

Automatically adjust imports and package declarations when moving a class in the file explorer. (As implemented in eclipse/eclipse.jdt.ls#683 ?)

Environment

• Operating System: Windows 10
• JDK version: 1.8.0_144
• Visual Studio Code version: 1.27.2
• Java extension version: 0.30.0

Steps To Reproduce

1. Move a Java source file to another folder in the explorer

Current Result

1. The imports in other source files are not updated

Expected Result

1. The imports should be updated accordingly

[julianosam]

That’s literally the one thing that’s stopping this (amazing) tool to become the # 1 choice for Java development. I am the only developer in a project of near 100 Java developers who is using VSCode for Java. People are very impressed when I show my Java code in VSCode and also skeptical. So they ask “can it do this?” or “I bet if you try this it won’t let you…”. And refactoring is a key point. I confess I’ve been relying on Eclipse to do more complex code refactoring… It’d be great to have this fetaure incorporated in the tool.

[testforstephen]

See https://github.com/microsoft/vscode/issues/43768, vscode will fire an FileWillRenameEvent when the user is renaming or moving (drag and drop) files in file explorer. By listening at this event, the language server is able to update package declaration and references.

Currently the change is proposed at vscode insider. When it’s officially ready, it will unblock us on the refactoring features such as move/rename file/rename package name.