virtual_desktop.py DOX

Purpose

• Own the virtual_desktop.py helper module.
• This module registers and proxies virtual desktop sessions.
• Keep this file-level DOX profile synchronized with virtual_desktop.py because this directory is intentionally flat.

Ownership

• virtual_desktop.py owns the runtime implementation.
• virtual_desktop.py.dox.md owns durable notes about responsibilities, contracts, side effects, and verification for that implementation.
• Classes:
• VirtualDesktopEndpoint (no explicit base class)
• VirtualDesktopRegistry (no explicit base class)
  • register(self, endpoint: VirtualDesktopEndpoint) -> None
  • unregister(self, token: str) -> None
  • proxy_for_token(self, token: str) -> VirtualDesktopEndpoint | None
  • resize(self, token: str, width: int, height: int) -> dict[str, Any]
• Top-level functions:
• register_session(token: str, host: str, port: int, owner: str=..., title: str=..., resize: ResizeCallback | None=...) -> None
• unregister_session(token: str) -> None
• proxy_for_token(token: str) -> VirtualDesktopEndpoint | None
• resize_session(token: str, width: int, height: int) -> dict[str, Any]
• get_registry() -> VirtualDesktopRegistry
• session_url(token: str, title: str=...) -> str
• collect_status() -> dict[str, Any]
• find_xpra_html_root() -> Path | None
• _package_installed(package: str) -> bool
• normalize_size(width: int | float | str, height: int | float | str, max_width: int=..., max_height: int=..., min_width: int=..., min_height: int=...) -> tuple[int, int]
• normalize_desktop_display_size(width: int | float | str, height: int | float | str, max_width: int=..., max_height: int=..., min_width: int=..., min_height: int=..., min_aspect_ratio: float=...) -> tuple[int, int]
• resize_display(display: int, width: int, height: int, max_width: int=..., max_height: int=..., window_class: str=..., keys: tuple[str, ...]=..., xauthority: str=..., home: str=...) -> dict[str, Any]
• _ensure_xrandr_mode(env: dict[str, str], width: int, height: int) -> None
• _select_xrandr_mode(env: dict[str, str], width: int, height: int) -> subprocess.CompletedProcess[str]
• _xrandr_output_modes(env: dict[str, str]) -> tuple[str, set[str]]
• current_display_size(display: int, xauthority: str=..., home: str=...) -> tuple[int, int] | None
• fit_window_until(display: int, width: int, height: int, window_class: str=..., keys: tuple[str, ...]=..., settle_seconds: float=..., timeout_seconds: float=..., process: subprocess.Popen[Any] | None=..., xauthority: str=..., home: str=...) -> None
• fit_window(display: int, width: int, height: int, window_class: str=..., keys: tuple[str, ...]=..., xauthority: str=..., home: str=...) -> bool
• has_window(display: int, window_class: str=..., name: str=..., xauthority: str=..., home: str=...) -> bool
• find_window(display: int, window_class: str=..., name: str=..., xauthority: str=..., home: str=...) -> str
• close_windows(display: int, names: tuple[str, ...]=..., window_class: str=..., xauthority: str=..., home: str=...) -> int
• _find_window(display: int, window_class: str=..., name: str=..., xauthority: str=..., home: str=...) -> str
• _display_env(display: int, xauthority: str=..., home: str=...) -> dict[str, str]
• Notable constants/configuration names: STATE_DIR, DEFAULT_WIDTH, DEFAULT_HEIGHT, MAX_WIDTH, MAX_HEIGHT, MIN_WIDTH, MIN_HEIGHT, MIN_DESKTOP_ASPECT_RATIO, SESSION_PATH, XPRA_HTML_ROOT_CANDIDATES.

Runtime Contracts

• Helper modules own reusable framework APIs and must preserve public callers unless all callers, tests, and docs are updated together.
• Update this file whenever public functions, classes, persistence behavior, path/security assumptions, side effects, or cross-module contracts change.
• Observed side-effect areas: filesystem reads, filesystem writes, network calls, subprocess/runtime control, plugin state, settings/state persistence, secret handling.
• Imported dependency areas include: __future__, dataclasses, helpers, helpers.localization, math, os, pathlib, re, shutil, subprocess, threading, time, typing, urllib.parse.

Key Concepts

• Important called helpers/classes observed in the source: Path, files.get_abs_path, get_registry.register, get_registry.unregister, get_registry.proxy_for_token, get_registry.resize, quote, urlencode, find_xpra_html_root, subprocess.run, normalize_size, shutil.which, _display_env, current_display_size, _ensure_xrandr_mode, _select_xrandr_mode, time.sleep, strip, _xrandr_output_modes, result.stdout.splitlines.
• Keep request/response, tool, or helper semantics documented here at the same time as source changes.

Work Guidance

• Preserve public helper APIs used by core code and plugins unless every caller is updated.
• Keep path, auth, secret, persistence, network, and subprocess behavior explicit and bounded.
• Prefer adding cohesive helper functions here only when behavior is reused across modules.

Verification

• Run targeted tests for changed helper behavior; run security regressions for auth, filesystem, WebSocket, tunnel, upload, or secret-handling helpers.
• Related tests observed by source search:
  • tests/test_office_canvas_setup.py
  • tests/test_office_desktop_state.py
  • tests/test_office_document_store.py

Child DOX Index

No child DOX files.