Feat: add tachyonFX animations

src/state/effects.rs

@@ -0,0 +1,54 @@
+use tachyonfx::{fx, Interpolation, Motion};
+
+use crate::page::Page;
+use crate::state::ui::UiState;
+use crate::state::Modal;
+use crate::theme;
+
+#[derive(Debug, Default, Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
+pub enum FxId {
+    #[default]
+    PageTransition,
+}
+
+pub fn tick_effects(ui: &mut UiState, page: Page) {
+    if !ui.show_title && ui.prev_show_title {
+        ui.effects.borrow_mut().add_unique_effect(
+            FxId::PageTransition,
+            fx::coalesce((200, Interpolation::QuadOut)),
+        );
+    }
+    ui.prev_show_title = ui.show_title;
+
+    let modal_open = !matches!(ui.modal, Modal::None);
+
+    if modal_open && !ui.prev_modal_open {
+        let bg = theme::get().ui.bg;
+        *ui.modal_fx.borrow_mut() = Some(fx::fade_from_fg(bg, (50, Interpolation::QuadOut)));
+    }
+    ui.prev_modal_open = modal_open;
+
+    if page != ui.prev_page {
+        let direction = page_direction(ui.prev_page, page);
+        let bg = theme::get().ui.bg;
+        ui.effects.borrow_mut().add_unique_effect(
+            FxId::PageTransition,
+            fx::sweep_in(direction, 10, 0, bg, (200, Interpolation::QuadOut)),
+        );
+        ui.prev_page = page;
+    }
+}
+
+fn page_direction(from: Page, to: Page) -> Motion {
+    let (fc, fr) = from.grid_pos();
+    let (tc, tr) = to.grid_pos();
+    if tc > fc {
+        Motion::LeftToRight
+    } else if tc < fc {
+        Motion::RightToLeft
+    } else if tr > fr {
+        Motion::UpToDown
+    } else {
+        Motion::DownToUp
+    }
+}