| 1 | //! The Equalizer page: the presets, and the bands of the custom ones. |
| 2 | |
| 3 | use budctl_core::status::{EqBand, EqPreset}; |
| 4 | use iced::widget::{Row, column, container, row, text}; |
| 5 | use iced::{Alignment, Border, Element, Length}; |
| 6 | |
| 7 | use crate::buds::{self, Buds}; |
| 8 | use crate::dots; |
| 9 | use crate::icons::Icon; |
| 10 | use crate::theme::Look; |
| 11 | use crate::ui; |
| 12 | use crate::{Draft, Item, Marks, Message}; |
| 13 | |
| 14 | /// Shown instead of a subtitle while a write is on its way. |
| 15 | const SAVING: &str = "Saving…"; |
| 16 | |
| 17 | /// What the keyboard cursor can rest on, top to bottom, as [`view`] shows them: each preset, |
| 18 | /// with a custom one's pencil and bin; "New preset"; then, while a preset's bands are open, |
| 19 | /// "Rename", "Done" and its bands. |
| 20 | pub fn items(buds: &Buds, editing: Option<u8>) -> Vec<Item> { |
| 21 | let mut items = Vec::new(); |
| 22 | let Some(eq) = &buds.eq else { |
| 23 | return items; |
| 24 | }; |
| 25 | for preset in &eq.presets { |
| 26 | items.push(Item::Preset(preset.id)); |
| 27 | if preset.custom { |
| 28 | items.extend([Item::Edit(preset.id), Item::Delete(preset.id)]); |
| 29 | } |
| 30 | } |
| 31 | items.push(Item::NewPreset); |
| 32 | if let Some(preset) = edited(buds, editing) { |
| 33 | items.extend([Item::Rename(preset.id), Item::Done]); |
| 34 | items.extend(preset.bands.iter().map(|band| Item::Band(preset.id, band.hz))); |
| 35 | } |
| 36 | items |
| 37 | } |
| 38 | |
| 39 | /// The custom preset in use, if one is. |
| 40 | pub fn in_use(buds: &Buds) -> Option<&EqPreset> { |
| 41 | let eq = buds.eq.as_ref()?; |
| 42 | let current = eq.current.as_deref()?; |
| 43 | eq.presets.iter().find(|p| p.custom && buds::key(p) == current) |
| 44 | } |
| 45 | |
| 46 | /// The custom preset whose bands are open, if any. |
| 47 | pub fn edited(buds: &Buds, editing: Option<u8>) -> Option<&EqPreset> { |
| 48 | buds.preset(editing?).filter(|preset| preset.custom) |
| 49 | } |
| 50 | |
| 51 | /// `editing`: the custom preset whose bands are open, drawn in `opened` (they fade in when |
| 52 | /// opened); `draft`: bands moved on the screen and not saved on the buds yet. |
| 53 | pub fn view<'a>( |
| 54 | look: Look, |
| 55 | opened: Look, |
| 56 | buds: &'a Buds, |
| 57 | editing: Option<u8>, |
| 58 | draft: Option<&'a Draft>, |
| 59 | marks: Marks, |
| 60 | ) -> Element<'a, Message> { |
| 61 | let p = look.p; |
| 62 | let title = ui::title(look, "equalizer · presets, and the bands of yours"); |
| 63 | let Some(eq) = &buds.eq else { |
| 64 | let none = ui::note(look, "These buds did not list their presets."); |
| 65 | return column![title, none].spacing(12).into(); |
| 66 | }; |
| 67 | let current = eq.current.as_deref(); |
| 68 | let rows = eq |
| 69 | .presets |
| 70 | .iter() |
| 71 | .map(|preset| { |
| 72 | let id = preset.id; |
| 73 | let chosen = current == Some(buds::key(preset).as_str()); |
| 74 | let subtitle = if marks.pending.contains(&Item::Preset(id)) { |
| 75 | SAVING |
| 76 | } else if preset.custom && editing == Some(id) { |
| 77 | "Your preset, open below" |
| 78 | } else if preset.custom { |
| 79 | "Your preset" |
| 80 | } else { |
| 81 | "Built in" |
| 82 | }; |
| 83 | let mark: Option<Element<'a, Message>> = chosen.then(|| ui::label(look, "in use", 10.5, p.fg)); |
| 84 | let trailing: Element<'a, Message> = if preset.custom { |
| 85 | row![mark] |
| 86 | .push(ui::icon_button( |
| 87 | look, |
| 88 | Icon::Pencil, |
| 89 | marks.focus == Some(Item::Edit(id)), |
| 90 | Message::EditPreset(id), |
| 91 | )) |
| 92 | .push(ui::icon_button( |
| 93 | look, |
| 94 | Icon::Trash, |
| 95 | marks.focus == Some(Item::Delete(id)), |
| 96 | Message::DeletePreset(id), |
| 97 | )) |
| 98 | .spacing(8) |
| 99 | .align_y(Alignment::Center) |
| 100 | .into() |
| 101 | } else { |
| 102 | row![mark].into() |
| 103 | }; |
| 104 | ui::list_row( |
| 105 | look, |
| 106 | Icon::Equalizer, |
| 107 | chosen, |
| 108 | buds::shown_name(preset), |
| 109 | Some(subtitle.to_owned()), |
| 110 | trailing, |
| 111 | Some(Message::Preset(id)), |
| 112 | marks.focus == Some(Item::Preset(id)), |
| 113 | ) |
| 114 | }) |
| 115 | .collect(); |
| 116 | let editor: Option<Element<'a, Message>> = match edited(buds, editing) { |
| 117 | Some(preset) => Some(bands(opened, preset, draft, marks)), |
| 118 | None if eq.presets.iter().any(|p| p.custom) => Some( |
| 119 | container(ui::note( |
| 120 | look, |
| 121 | "Use the pencil on one of your presets to change its bands.", |
| 122 | )) |
| 123 | .padding([0, 18]) |
| 124 | .into(), |
| 125 | ), |
| 126 | None => None, |
| 127 | }; |
| 128 | column![title, ui::card(look, rows), new_preset(look, marks), editor] |
| 129 | .spacing(18) |
| 130 | .into() |
| 131 | } |
| 132 | |
| 133 | /// The button that creates a custom preset, and what it is doing. |
| 134 | fn new_preset<'a>(look: Look, marks: Marks) -> Element<'a, Message> { |
| 135 | let creating = marks |
| 136 | .pending |
| 137 | .contains(&Item::NewPreset) |
| 138 | .then(|| ui::label(look, "Creating…", 11.0, look.p.live)); |
| 139 | let about = container(ui::note(look, "A new preset starts flat and is put to use.")).width(Length::Fill); |
| 140 | row![about] |
| 141 | .push(creating) |
| 142 | .push(ui::pill_with( |
| 143 | look, |
| 144 | "New preset", |
| 145 | false, |
| 146 | marks.focus == Some(Item::NewPreset), |
| 147 | Message::NewPreset, |
| 148 | )) |
| 149 | .spacing(14) |
| 150 | .align_y(Alignment::Center) |
| 151 | .padding([0, 18]) |
| 152 | .into() |
| 153 | } |
| 154 | |
| 155 | /// A custom preset's bands, one slider each. |
| 156 | fn bands<'a>(look: Look, preset: &'a EqPreset, draft: Option<&'a Draft>, marks: Marks) -> Element<'a, Message> { |
| 157 | let p = look.p; |
| 158 | let id = preset.id; |
| 159 | let gains: &[EqBand] = match draft { |
| 160 | Some(draft) if draft.preset == id => &draft.bands, |
| 161 | _ => &preset.bands, |
| 162 | }; |
| 163 | let (low, high) = preset.range.unwrap_or((-6, 6)); |
| 164 | let saving = marks |
| 165 | .pending |
| 166 | .contains(&Item::Preset(id)) |
| 167 | .then(|| ui::label(look, SAVING, 11.0, p.live)); |
| 168 | let heading = row![ |
| 169 | text(preset.name.as_str()).size(20).font(look.semibold()).color(p.fg), |
| 170 | container(ui::label(look, &format!("{low:+} to {high:+} dB"), 11.0, p.grey)).width(Length::Fill) |
| 171 | ] |
| 172 | .push(saving) |
| 173 | .push(ui::pill_with( |
| 174 | look, |
| 175 | "Rename", |
| 176 | false, |
| 177 | marks.focus == Some(Item::Rename(id)), |
| 178 | Message::RenamePreset(id), |
| 179 | )) |
| 180 | .push(ui::pill_with( |
| 181 | look, |
| 182 | "Done", |
| 183 | false, |
| 184 | marks.focus == Some(Item::Done), |
| 185 | Message::DoneEditing, |
| 186 | )) |
| 187 | .spacing(10) |
| 188 | .align_y(Alignment::Center); |
| 189 | let note = ui::note( |
| 190 | look, |
| 191 | "Moving a band saves this preset and puts it in use, so you hear it.", |
| 192 | ); |
| 193 | let sliders = gains.iter().fold(Row::new().spacing(6), |sliders, &band| { |
| 194 | let focused = marks.focus == Some(Item::Band(id, band.hz)); |
| 195 | let hz = band.hz; |
| 196 | let slider = dots::Slider { |
| 197 | low: i16::from(low), |
| 198 | high: i16::from(high), |
| 199 | value: i16::from(band.gain), |
| 200 | vertical: true, |
| 201 | change: move |gain, save| Message::Band { |
| 202 | preset: id, |
| 203 | hz, |
| 204 | gain: i8::try_from(gain).unwrap_or(0), |
| 205 | save, |
| 206 | }, |
| 207 | release: Message::SaveBands(id), |
| 208 | on: p.fill, |
| 209 | off: p.s3, |
| 210 | motion: look.motion, |
| 211 | }; |
| 212 | let band = column![ |
| 213 | ui::num(look, &gain(band.gain), 28.0, p.fg), |
| 214 | slider.view(190.0), |
| 215 | ui::label(look, &frequency(hz), 10.5, p.grey) |
| 216 | ] |
| 217 | .spacing(12) |
| 218 | .align_x(Alignment::Center); |
| 219 | sliders.push( |
| 220 | container(band) |
| 221 | .center_x(Length::Fill) |
| 222 | .padding([14, 0]) |
| 223 | .style(move |_| container::Style { |
| 224 | background: focused.then_some(p.s2.into()), |
| 225 | border: Border { |
| 226 | color: p.fill, |
| 227 | width: if focused { 2.0 } else { 0.0 }, |
| 228 | radius: 24.0.into(), |
| 229 | }, |
| 230 | ..container::Style::default() |
| 231 | }), |
| 232 | ) |
| 233 | }); |
| 234 | ui::panel(look, column![heading, note, sliders].spacing(16).into()) |
| 235 | } |
| 236 | |
| 237 | /// `3` → "+3", `0` → "0", `-2` → "-2". |
| 238 | pub fn gain(db: i8) -> String { |
| 239 | if db == 0 { "0".to_owned() } else { format!("{db:+}") } |
| 240 | } |
| 241 | |
| 242 | /// `50` → "50 Hz", `16000` → "16 kHz". |
| 243 | fn frequency(hz: u16) -> String { |
| 244 | if hz >= 1000 && hz.is_multiple_of(1000) { |
| 245 | format!("{} kHz", hz / 1000) |
| 246 | } else { |
| 247 | format!("{hz} Hz") |
| 248 | } |
| 249 | } |
| 250 | |
| 251 | #[cfg(test)] |
| 252 | mod tests { |
| 253 | use super::*; |
| 254 | |
| 255 | #[test] |
| 256 | fn items_follow_the_page() { |
| 257 | let buds = buds::demo(); |
| 258 | let closed = items(&buds, None); |
| 259 | assert_eq!(closed.len(), 4 + 3 + 1); |
| 260 | assert_eq!(closed.first(), Some(&Item::Preset(0))); |
| 261 | assert_eq!( |
| 262 | closed.get(4..), |
| 263 | Some(&[Item::Preset(4), Item::Edit(4), Item::Delete(4), Item::NewPreset][..]) |
| 264 | ); |
| 265 | let open = items(&buds, Some(4)); |
| 266 | assert_eq!(open.len(), 8 + 2 + 6); |
| 267 | assert_eq!(open.get(8..10), Some(&[Item::Rename(4), Item::Done][..])); |
| 268 | assert_eq!(open.last(), Some(&Item::Band(4, 16000))); |
| 269 | // A built-in preset has no bands to open. |
| 270 | assert_eq!(items(&buds, Some(0)).len(), 8); |
| 271 | assert!(items(&buds::unknown(), None).is_empty()); |
| 272 | } |
| 273 | |
| 274 | #[test] |
| 275 | fn gains() { |
| 276 | assert_eq!(gain(3), "+3"); |
| 277 | assert_eq!(gain(0), "0"); |
| 278 | assert_eq!(gain(-6), "-6"); |
| 279 | } |
| 280 | |
| 281 | #[test] |
| 282 | fn frequencies() { |
| 283 | assert_eq!(frequency(50), "50 Hz"); |
| 284 | assert_eq!(frequency(1000), "1 kHz"); |
| 285 | assert_eq!(frequency(16000), "16 kHz"); |
| 286 | assert_eq!(frequency(62), "62 Hz"); |
| 287 | } |
| 288 | } |