zed-highlight

"Free as in use-after."

-- @catsalad@infosec.exchange

Zed Highlight is a Language Server Protocol (LSP) extension for the Zed editor, designed to provide word highlighting. It is useful for quickly identifying all occurrences of selected words in the code, enhancing readability and navigation when tracing the program flow from input sources to potential vulnerability sinks.

Features

The following features are currently supported by the extension and the bundled LSP server:

• Easy access to the following code actions via the editor: toggle code actions menu (⌘. shortcut or lightning bolt icon in the gutter):
  • Highlight or Remove highlight - Toggle highlighting on and off for the current selection.
  • Clear all highlights - Remove all highlights with a single command.
• Configurable highlight colors (via settings.json).

See also

• https://zed.dev/extensions
• https://marketplace.visualstudio.com/items?itemName=debugpig.highlight
• https://github.com/debugpig/vscode-extension-highlight
• https://github.com/huacnlee/color-lsp

Installing

• TODO - add instructions for installing via Zed's extension marketplace once it's published there.
• TODO - add instructions for installing the LSP server manually via cargo install zed-highlight-lsp + dev extension

Usage

Use the Zed Highlight extension as follows:

• TODO - add detailed instructions for using the extension, including custom keymap entries and configuration options.
• TODO - add instructions for configuring colors (e.g., via settings.json).

Compatibility

The latest release was tested with Zed 1.1.7 on:

• Apple macOS Tahoe 26.4.1

Credits

• @debugpig for their useful vscode-extension-highlight, which served as a major inspiration for this project.

Changelog

• CHANGELOG.md

TODO

• Test with both light and dark themes. Then, release to the Zed marketplace and crates.io.
• Try another approach to implementing colors via LSP (e.g., the textDocument/documentColor capability).
• Add a command-line interface for manual use of the LSP server outside of Zed.
• Add customizable settings (e.g., whole_word and ignore_case flags that are already suppported by the LSP).
• Add highlighting based on regular expressions.
• Add a sidebar for navigation between currently highlighted words.