Upload spectral-core/src/damage.rs

spectral-core/src/damage.rs

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+/// Per-frame damage tracking for partial redraw.
+#[derive(Clone, Debug, Default, PartialEq)]
+pub enum Damage {
+    #[default]
+    None,
+    Full,
+    Lines(Vec<LineDamage>),
+    Rects(Vec<RectDamage>),
+}
+
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+pub struct LineDamage {
+    pub row: usize,
+    pub start_col: usize,
+    pub end_col: usize,
+}
+
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+pub struct RectDamage {
+    pub x: u32,
+    pub y: u32,
+    pub w: u32,
+    pub h: u32,
+}
+
+impl Damage {
+    pub fn add_line(&mut self, row: usize, start_col: usize, end_col: usize) {
+        match self {
+            Damage::None => {
+                *self = Damage::Lines(vec![LineDamage { row, start_col, end_col }]);
+            }
+            Damage::Lines(lines) => {
+                lines.push(LineDamage { row, start_col, end_col });
+            }
+            _ => {}
+        }
+    }
+
+    pub fn add_rect(&mut self, x: u32, y: u32, w: u32, h: u32) {
+        match self {
+            Damage::None => {
+                *self = Damage::Rects(vec![RectDamage { x, y, w, h }]);
+            }
+            Damage::Rects(rects) => {
+                rects.push(RectDamage { x, y, w, h });
+            }
+            _ => {}
+        }
+    }
+
+    pub fn set_full(&mut self) {
+        *self = Damage::Full;
+    }
+
+    pub fn take(&mut self) -> Damage {
+        std::mem::take(self)
+    }
+}