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//! Semantic-annotation collision ownership for SVG rendering.
use std::collections::HashMap;
use acorde_core::{Articulation, Measure};
use acorde_layout::{GlyphCollisionClass, GlyphCollisionDirection, GlyphMetrics, GlyphPlacement};
use crate::RenderError;
use crate::SVG_ANNOTATION_COLLISION_GAP_PX;
use crate::collision::CollisionOwner;
use crate::render::{NoteKey, NotePoint, render_articulation, write_annotation_text};
#[derive(Clone, Copy)]
pub(crate) struct Kinds {
pub(crate) lyrics: bool,
pub(crate) dynamics_and_chords: bool,
pub(crate) articulations: bool,
}
impl Kinds {
pub(crate) const ALL: Self = Self {
lyrics: true,
dynamics_and_chords: true,
articulations: true,
};
}
enum SemanticAnnotation<'a> {
Text {
class: &'static str,
text: String,
x: f32,
italic: bool,
},
Articulation {
articulation: &'a Articulation,
x: f32,
direction: f32,
},
}
/// Render note-attached semantics through one constrained collision pass.
#[allow(clippy::too_many_arguments)]
pub(crate) fn render_measure_semantic_annotations(
body: &mut String,
measure: &Measure,
part: usize,
staff: usize,
measure_idx: usize,
note_points: &HashMap<NoteKey, NotePoint>,
space: f32,
kinds: Kinds,
) -> Result<Vec<GlyphPlacement>, RenderError> {
let mut annotations = Vec::new();
let mut owner = CollisionOwner::with_fixed_obstacles(&[]);
for (voice_idx, voice) in measure.voices.iter().enumerate() {
for (note_idx, note) in voice.iter().enumerate() {
let Some(&(x, anchor_y, stem_up, _)) =
note_points.get(&(part, staff, measure_idx, voice_idx, note_idx))
else {
continue;
};
if kinds.dynamics_and_chords {
for (class, text, above, priority) in [
(
"acorde-dynamic",
note.dynamic
.as_ref()
.map(|value| value.to_musicxml_str().to_owned()),
stem_up,
1,
),
(
"acorde-chord-symbol",
note.chord_symbol.as_ref().map(|value| value.display_text()),
true,
2,
),
] {
let Some(text) = text else {
continue;
};
let distance = if class == "acorde-dynamic" { 4.0 } else { 5.6 };
annotations.push(SemanticAnnotation::Text {
class,
text: text.clone(),
x,
italic: true,
});
let width = text.chars().count() as f32 * 0.42 * space + 0.6 * space;
owner.push(
GlyphPlacement {
resource_key: format!(
"{class}:{part}:{staff}:{measure_idx}:{voice_idx}:{note_idx}"
),
metrics: GlyphMetrics {
advance_mm: 0.0,
left_mm: -width / 2.0,
top_mm: -0.72 * space,
width_mm: width,
height_mm: 0.9 * space,
},
x_mm: x,
y_mm: if above {
anchor_y - distance * space
} else {
anchor_y + distance * space
},
priority,
},
GlyphCollisionClass::Annotation,
if above {
GlyphCollisionDirection::Up
} else {
GlyphCollisionDirection::Down
},
);
}
}
if kinds.lyrics
&& let Some(lyric) = ¬e.lyric
{
let text = lyric.text.clone();
annotations.push(SemanticAnnotation::Text {
class: "acorde-lyric",
text: text.clone(),
x,
italic: false,
});
let width = text.chars().count() as f32 * 0.42 * space + 0.6 * space;
owner.push(
GlyphPlacement {
resource_key: format!(
"lyric:{part}:{staff}:{measure_idx}:{voice_idx}:{note_idx}"
),
metrics: GlyphMetrics {
advance_mm: 0.0,
left_mm: -width / 2.0,
top_mm: -0.72 * space,
width_mm: width,
height_mm: 0.9 * space,
},
x_mm: x,
y_mm: anchor_y
+ if !stem_up && note.dynamic.is_some() {
5.9
} else {
4.8
} * space,
priority: 1,
},
GlyphCollisionClass::Annotation,
GlyphCollisionDirection::Down,
);
}
if kinds.articulations {
for (articulation_idx, articulation) in note.articulations.iter().enumerate() {
let distance = 1.2 + articulation_idx as f32;
annotations.push(SemanticAnnotation::Articulation {
articulation,
x,
direction: if stem_up { -1.0 } else { 1.0 },
});
owner.push(
GlyphPlacement {
resource_key: format!(
"articulation:{part}:{staff}:{measure_idx}:{voice_idx}:{note_idx}:{articulation_idx}"
),
metrics: GlyphMetrics {
advance_mm: 0.0,
left_mm: -0.48 * space,
top_mm: -0.48 * space,
width_mm: 0.96 * space,
height_mm: 0.96 * space,
},
x_mm: x,
y_mm: if stem_up {
anchor_y - distance * space
} else {
anchor_y + distance * space
},
priority: 1,
},
GlyphCollisionClass::Annotation,
if stem_up {
GlyphCollisionDirection::Up
} else {
GlyphCollisionDirection::Down
},
);
}
}
}
}
owner
.resolve(SVG_ANNOTATION_COLLISION_GAP_PX)
.map_err(|_| RenderError::InvalidNotePlacement {
field: "semantic annotation collision",
})?;
let placements = owner.into_placements();
for (annotation, placement) in annotations.into_iter().zip(&placements) {
match annotation {
SemanticAnnotation::Text {
class,
text,
x,
italic,
} => write_annotation_text(body, class, &text, x, placement.y_mm, space, italic),
SemanticAnnotation::Articulation {
articulation,
x,
direction,
} => render_articulation(body, articulation, x, placement.y_mm, direction, space),
}
}
Ok(placements)
}