98 lines
3.2 KiB
Python
98 lines
3.2 KiB
Python
"""Full-screen keyboard help."""
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from __future__ import annotations
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import sys
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import textwrap
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from rich.console import Group
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from rich.table import Table
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from rich.text import Text
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from textual.app import ComposeResult
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from textual.screen import ModalScreen
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from textual.widgets import Static
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from .common import SPECTRUM_STOPS, gradient
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HELP_ROWS: tuple[tuple[str, str], ...] = (
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("↑ / ↓ j / k", "move through the station list"),
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("enter", "tune in to the selected station"),
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("space", "play / pause the current station"),
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("s", "stop playback"),
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("] / [", "next / previous station (tunes immediately)"),
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("+ / -", "volume up / down"),
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("m", "mute / unmute"),
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("f", "favourite — favourites float to the top"),
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("/", "filter stations by title, genre or description"),
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("esc", "clear the filter / close overlays"),
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(
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"v",
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"cycle visualiser: mirror → bars → wave → waterfall → radial → braille",
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),
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("r", "refresh station list and song history"),
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("g / G", "jump to the top / bottom of the list"),
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("? ", "this help"),
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("q", "quit"),
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)
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ABOUT_COMMON = (
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(
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"Stations and song history come from somafm.com "
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"(channels.json + songs/<station>.json)."
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),
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)
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ABOUT_LINUX = (
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(
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"The spectrum captures your actual PulseAudio/PipeWire output with "
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"parec (SYNC); otherwise it falls back to a muted ffmpeg stream tap "
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"(FFT, can drift) or a synthesized display (SIM)."
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),
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(
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"The desktop picks us up over MPRIS as a "
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"somafmtui media player — try `playerctl -l` / `playerctl metadata`."
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),
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)
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ABOUT_MACOS = (
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(
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"The spectrum captures your Mac's real audio output (SYNC) with a "
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"native Core Audio process tap — nothing to install. macOS asks for "
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"System Audio Recording permission the first time; without it the "
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"analyser falls back to a muted ffmpeg stream tap (FFT, can drift) "
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"or a synthesized display (SIM)."
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),
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(
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"mpv publishes what is playing to the macOS Now Playing session, so "
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"Control Center and the keyboard media keys control this app."
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),
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)
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ABOUT = ABOUT_COMMON + (ABOUT_MACOS if sys.platform == "darwin" else ABOUT_LINUX)
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class HelpScreen(ModalScreen[None]):
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def compose(self) -> ComposeResult:
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table = Table.grid(padding=(0, 2), expand=False)
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table.add_column(style="bold cyan", no_wrap=True, justify="right")
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table.add_column(style="")
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for key, description in HELP_ROWS:
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table.add_row(key, description)
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header = Text()
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header.append("◤ ", style=f"bold {gradient(SPECTRUM_STOPS, 0.9)}")
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header.append("SOMAFM TUI", style=f"bold {gradient(SPECTRUM_STOPS, 0.55)}")
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header.append(" keyboard & credits", style="dim")
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footer = Text()
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for paragraph in ABOUT:
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for line in textwrap.wrap(paragraph, width=70):
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footer.append(line + "\n", style="dim")
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body = Group(header, Text(""), table, Text(""), footer)
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yield Static(body, id="help")
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def on_key(self, event) -> None:
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event.stop()
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self.dismiss(None)
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