Visual Studio Code File Decoration Provider

Colors the tab labels of the editors below via a FileDecorationProvider — the same mechanism as Git decorations (gray for ignored files, modified color, etc.), so it coexists with them peacefully:

• Files outside the current workspace (file scheme, not under any workspace folder)
• Files inside a .git directory (file scheme, any .git path segment)
• User configuration files: user-scope settings.json and keybindings.json (vscode-userdata scheme)
• The Settings GUI editor (vscode-settings scheme)
• Extension detail pages "Extension: xxx" (extension scheme)
• Newly opened, unsaved untitled editors (untitled scheme)

Colors

Each category maps to its own theme color ID, all defaulting to #8C8C8C, and can be overridden via workbench.colorCustomizations:

"workbench.colorCustomizations": {
    "fileDecorationProvider.nonWorkspaceFiles": "#8c8c8c",
    "fileDecorationProvider.gitInternals": "#8c8c8c",
    "fileDecorationProvider.userData": "#8c8c8c",
    "fileDecorationProvider.settingsEditor": "#8c8c8c",
    "fileDecorationProvider.extensionPages": "#8c8c8c",
    "fileDecorationProvider.untitled": "#8c8c8c"
}

Settings

Each category can be toggled independently; all default to enabled:

• fileDecorationProvider.decorate.nonWorkspaceFiles
• fileDecorationProvider.decorate.gitInternals
• fileDecorationProvider.decorate.userData
• fileDecorationProvider.decorate.settingsEditor
• fileDecorationProvider.decorate.extensionPages
• fileDecorationProvider.decorate.untitled

Requirements and limitations

• Tab coloring requires workbench.editor.decorations.colors to be enabled; to also take effect in the Explorer, explorer.decorations.colors is required as well
• Problems decorations (error red, warning yellow) have higher priority and override this extension's colors
• The Keyboard Shortcuts GUI editor has no resource URI inside VS Code (resource = undefined), so no decoration mechanism can color it; keybindings.json opened as JSON belongs to vscode-userdata and is colored normally
• With no folder open (an empty window), file scheme files are not dimmed as "non-workspace"