Implemented more vscode.executeXXX commands

[JPinkney]

Signed-off-by: Josh Pinkney joshpinkney@gmail.com

What it does

This PR implements a few more vscode.executeXXX commands:

• vscode.executeDefinitionProvider
• vscode.executeDeclarationProvider
• vscode.executeTypeDefinitionProvider
• vscode.executeHoverProvider
• vscode.executeDocumentHighlights
• vscode.executeFormatDocumentProvider
• vscode.executeFormatRangeProvider
• vscode.executeFormatOnTypeProvider

It also reorganizes the current commands so that they are in-line with the built-in commands documentation from VSCode

How to test

You can test this PR by first adding vscode java into your plugins.

Then clone https://github.com/JPinkney/executeXXXCommands into the theia plugins folder and from theia/examples/browser run yarn run start ../../plugins/test/testWorkspace/ so that theia correctly starts with the test workspace. Then open MySample.java.

The plugin registers vscode commands that call the new vscode.executeXXX apis. Open the command palette and then type execute and you should see a commands such as executeHoverProvider if you press on one of these commands it will log the output to the terminal where you started theia.

Review checklist

• as an author, I have thoroughly tested my changes and carefully followed the review guidelines

Reminder for reviewers

• as a reviewer, I agree to behave in accordance with the review guidelines

[akosyakov]

@JPinkney could you check commands here: #4050

Also It will be good to update the issue with commands which are registered in https://github.com/microsoft/vscode/blob/master/src/vs/workbench/api/common/extHostApiCommands.ts but missing in docs

[elaihau]

I followed your instructions however can only see 7 commands (not all 8). am i misunderstanding something?

[akosyakov]

I also could not find a command for last provider, but code looks good and other providers work. Thank you!

[akosyakov]

@JPinkney merging?