Init

src/services/mod.rs

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+pub mod pattern_editor;

src/services/pattern_editor.rs

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+use crate::model::{PatternSpeed, Project};
+
+#[derive(Debug, Clone, Copy)]
+pub struct PatternChange {
+    pub bank: usize,
+    pub pattern: usize,
+}
+
+impl PatternChange {
+    pub fn new(bank: usize, pattern: usize) -> Self {
+        Self { bank, pattern }
+    }
+}
+
+pub fn toggle_step(
+    project: &mut Project,
+    bank: usize,
+    pattern: usize,
+    step: usize,
+) -> PatternChange {
+    if let Some(s) = project.pattern_at_mut(bank, pattern).step_mut(step) {
+        s.active = !s.active;
+    }
+    PatternChange::new(bank, pattern)
+}
+
+pub fn set_length(
+    project: &mut Project,
+    bank: usize,
+    pattern: usize,
+    length: usize,
+) -> (PatternChange, usize) {
+    project.pattern_at_mut(bank, pattern).set_length(length);
+    let actual = project.pattern_at(bank, pattern).length;
+    (PatternChange::new(bank, pattern), actual)
+}
+
+pub fn get_length(project: &Project, bank: usize, pattern: usize) -> usize {
+    project.pattern_at(bank, pattern).length
+}
+
+pub fn increase_length(
+    project: &mut Project,
+    bank: usize,
+    pattern: usize,
+) -> (PatternChange, usize) {
+    let current = get_length(project, bank, pattern);
+    set_length(project, bank, pattern, current + 1)
+}
+
+pub fn decrease_length(
+    project: &mut Project,
+    bank: usize,
+    pattern: usize,
+) -> (PatternChange, usize) {
+    let current = get_length(project, bank, pattern);
+    set_length(project, bank, pattern, current.saturating_sub(1))
+}
+
+pub fn set_speed(
+    project: &mut Project,
+    bank: usize,
+    pattern: usize,
+    speed: PatternSpeed,
+) -> PatternChange {
+    project.pattern_at_mut(bank, pattern).speed = speed;
+    PatternChange::new(bank, pattern)
+}
+
+pub fn increase_speed(project: &mut Project, bank: usize, pattern: usize) -> PatternChange {
+    let pat = project.pattern_at_mut(bank, pattern);
+    pat.speed = pat.speed.next();
+    PatternChange::new(bank, pattern)
+}
+
+pub fn decrease_speed(project: &mut Project, bank: usize, pattern: usize) -> PatternChange {
+    let pat = project.pattern_at_mut(bank, pattern);
+    pat.speed = pat.speed.prev();
+    PatternChange::new(bank, pattern)
+}
+
+pub fn set_step_script(
+    project: &mut Project,
+    bank: usize,
+    pattern: usize,
+    step: usize,
+    script: String,
+) -> PatternChange {
+    if let Some(s) = project.pattern_at_mut(bank, pattern).step_mut(step) {
+        s.script = script;
+    }
+    PatternChange::new(bank, pattern)
+}
+
+pub fn get_step_script(
+    project: &Project,
+    bank: usize,
+    pattern: usize,
+    step: usize,
+) -> Option<String> {
+    project
+        .pattern_at(bank, pattern)
+        .step(step)
+        .map(|s| s.script.clone())
+}