Struct NoPaths 

pub struct NoPaths;

A provider that reports no directories at all, so nothing it is handed to touches a real XDG path.

Public rather than test-only: a preview window, a headless rasterise and every integration test want the same answer, and each had written its own copy of these three Nones.

Trait Implementations

impl AppPathsProvider for NoPaths

fn config_dir(&self) -> Option<PathBuf>

fn data_dir(&self) -> Option<PathBuf>

fn cache_dir(&self) -> Option<PathBuf>

fn state_dir(&self) -> Option<PathBuf>

Machine-written state the user never edits. Defaults to data_dir, which is where it lives on every platform that does not separate the two.

fn runtime_dir(&self) -> Option<PathBuf>

Session-scoped runtime files — a socket, a lock. None where the platform has no such place, which is the caller’s cue to pick its own rather than be handed a directory that outlives the session.

fn system_fonts_dir(&self) -> Option<PathBuf>

OS system-font directory to scan for fallback family resolution. None on platforms where the renderer’s default font discovery suffices (desktop); the platform adapter overrides it where the OS keeps fonts in a fixed location (Android → /system/fonts).

fn sans_serif_candidates(&self) -> Vec<String>

Sans-serif family names to try in priority order, OS/OEM-specific. Empty when default discovery suffices; the platform adapter overrides it (Android OEM font stacks).