Improvements and Next Steps for the Processing Language Server (LSP)

We’re revisiting the Processing Language Server with the goal of improving support for writing and editing Processing code outside the PDE.

Background

Several contributors have laid important groundwork for this effort:

• Initial work by @kgtkr was incorporated for Processing 4.1. They also built a minimal Processing LSP client for VSCode.
• Further work by @efratror was included in Processing 4.3 (see https://github.com/processing/processing4/issues/678 and https://github.com/processing/processing4/issues/690)
• As part of the pr05 grant in 2024, @diyaayay worked on another VS Code extension though it did not make use of the built-in LSP.

Proposed Improvements

We’d like to improve and extend the current functionality of the built-in LSP. Priorities are:

• Display parameter names in function signatures (e.g., copy(sx, sy, sw, sh, dx, dy, dw, dh)) should show named parameters
• "Go to declaration" for built-in functions and classes (linking to Processing source code when possible)
• Hover documentation for built-in functions and core classes
• Support for overloaded functions (e.g., colorMode(mode), colorMode(mode, max), colorMode(mode, max1, max2, max3))

If you're interested in contributing or discussing further, feel free to comment here.

Thanks again to everyone who has contributed to this work so far!

現在組み込まれている Processing Language Server と、この issue にリンクされている過去の作業（issues 564、678、690 を含む）をまず確認してください。その動作を一覧にある優先事項と比較し、特定の 1 つの LSP capability に対して完了を検証できる、焦点を絞った貢献を定義してください。