Support Collapsed Text

[mtbaqer]

Description

Adds VSCode client implementation of LSP's collapsed text.
Allows for custom collapsed text instead of the default ..., and the ability to start folding anywhere in the start line not only at the very end. See the demo below.

Demo

Issues

• Fixes [folding] custom folding text for folded ranges #70794.

Should make following issues trivial to solve:

• [folding] Collapse ending brace to the same line #3352
• [folding] Show number of lines folded #130250
• [folding] show comment first line for folded sections #31966

Does a lot of heavy lifting for (but still requires some work):

• Support folding ranges inside a line #50840

Changes

• Adds two fields to almost all inner folding interfaces/classes (FoldingRange, FoldingRegion, etc.):

  • collapsedText: text to display
  • startColumn: where the folding should start at the start line. More details here.

• Changes FoldingDecorations to dynamically construct collapsed decorations to include collapsed text (currently little messy, will make a future refactor PR to reduce the size of this one).

• Introduces new InlineFoldingRange class to support the custom startColumn.

• Adds new hideContent field to ModelDecorationOptions to support InlineFoldingRange.

• Modifies ModelLineProjection, ModelLineProjectionData and related classes to support inlineFoldingRange.

• Adds new test cases and modifies current ones for most classes touched.

Note: The current implementation assumes InlineFoldingRange decorations are located in the same InjectedText decoration tree. This can be changed in future updates.

PR Draft

Draft because I could some help with vscode.d.ts proposal and best place for enforcing isProposedApiEnabled

[mtbaqer]

@microsoft-github-policy-service agree