vscode: Add support for resolveTreeItem to TreeDataProvider

[lucas-koehler]

What it does

• Extend theia.d.ts with optional method resolveTreeItem in TreeDataProvider
• Add infrastructure on ext side to resolve tree items
• Add resolvable tree view node classes
• Add resolvement for tooltips and commands
• Align TreeViewItem and TreeViewNode tooltip property type to include MarkdownString

Fixes #11147

Contributed on behalf of STMicroelectronics

Signed-off-by: Lucas Koehler [email protected]

How to test

• Download the test extension here
  • See this release and find the code that implements TreeDataProvider.resolveTreeItem here
• The extension adds a view TEST VIEW to the explorer. The a element subtree resolves tooltips and commands while the b element subtree has both given as part of the original tree items.
  
• Hover over a and b sub(elements): Tooltips should be shown for both.
• Click elements to show a notification including the element id. Same for using space or Enter on selected entries

TreeDataProvider-resolveTreeItem.mp4

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

[msujew]

Looks quite good! I can confirm that the extension and the new API works as expected.

[lucas-koehler]

@msujew Thank you very much for the review and the suggestions :) I incorporated them and rebased onto the current master.

Edit: The 3PP License Check seems to have failed because of a missing access token:

ERROR: Please setup an Eclipse Foundation Gitlab Personal Access Token to run the license check in "review" mode
ERROR: It should be set in an environment variable named "DASH_LICENSES_PAT"

[vince-fugnitto]

Edit: The 3PP License Check seems to have failed because of a missing access token:

@lucas-koehler rebasing the pull-request again should fix the license check errors you encountered thanks to #11770.

Does the pull-request ultimately close #11147? (at the moment the issue is not properly linked)

[lucas-koehler]

@vince-fugnitto Thanks for the hint. Yes, this closes #11147 . I adapted the PR message accordingly.

[msujew]

Looks good to me 👍

• Items are resolved using the API as expected
• Aligns the TreeDataProvider API to the newest version of vscode