l0ng-ai
beab7992f9
Two editor toggles under Settings › Editor › Color Scheme › Language Defaults (off by default, also actions `editor.toggleRainbowBrackets` / `editor.toggleSemanticHighlighting`):
- Semantic highlighting (IDEA's rainbow variables): locals and parameters coloured by a name hash from LSP semantic tokens; fields, statics, constants, library symbols untouched.
- Rainbow brackets (VS Code's bracket pair colorization): (), [], {} by depth, unmatched in the error colour, strings/comments skipped, visible ranges only with 4 KB checkpoints.
Palettes are theme tokens (`--syn-rainbow-1..5`, `--syn-bracket-1..3`, light/dark/high-contrast), editable in the Color Scheme tree, and mapped from IntelliJ `.icls` RAINBOW_COLOR1..5.
App verification on macOS found the colours were overridden by the syntax highlighter's span nested inside the marks; the rules now cover descendants. Verified both toggles on/off live in a TS file.
Fixes #56
https://claude.ai/code/session_01VUYsdXA2nkF5v6zsC93dpn
Theme plugin template
A complete OpenIDEA theme plugin with one worked example, Harbor Night: a
dark theme with slate surfaces, a teal accent and a warm syntax palette. Copy
this folder to start your own theme. Full documentation, the token reference
and porting guides are in docs/plugins/themes.md.
theme-plugin/
├─ plugin.toml # manifest: id, name, version, the theme files
└─ themes/
├─ harbor-night.theme.json # UI colours, every themeable token, grouped like tokens.css
└─ harbor-night.scheme.json # editor colour scheme: syntax, editor, ANSI colours
A theme plugin is data only: no code, no WebAssembly, no build step.
Make your own
- Copy the folder, for example to
~/openidea-themes/theme-my-theme. - In
plugin.toml, changeid(lowercase,a-z 0-9 - _),name,description,authorsand the two paths. - Rename the theme files. In the theme file, set
id,nameandkind("dark"or"light", the built-in base for anything you leave out). - Edit the colours. Each key is a CSS variable from
src/styles/tokens.css, and the reference in the docs gives the Islands Dark and Light values. Comments (//,/* */) are allowed. Delete a line to keep the built-in value.
Porting an IntelliJ theme? pnpm theme:import-intellij <file.theme.json> [file.icls] --out <dir>
in the OpenIDEA repository generates a package in this layout.
Package and install
The folder is the package. To share it, publish the folder as a Git repository or a zip that users extract.
- In OpenIDEA open Settings › Plugins, click the gear menu and choose
Install Plugin from Disk… (or run the Install Plugin from Disk…
action), then pick the folder that contains
plugin.toml. - Select the plugin in the Installed tab and press Apply next to the theme.
- Use Default Theme in the same place goes back to the built-in theme.
Iterate
Put (or symlink) the folder in <project>/.openidea/plugins/ of an open
project. It loads as a dev plugin, and Reload in Settings › Plugins (or
the Reload Plugins action) re-reads your edits without reinstalling. Invalid
JSON or values are reported in Settings › Plugins with the file and line.
Licence
The template and Harbor Night are part of OpenIDEA (Apache-2.0). When you port someone else's theme, keep its licence and credit its authors.