Separated allocation

pulse-ui/src/layout.rs

@@ -13,16 +13,25 @@ pub struct Rect {
     pub height: u16,
 }
 
+#[derive(Debug, Clone)]
 pub enum LayoutItem {
     Rows { unit: Size, items: Vec<LayoutItem> },
     Columns { unit: Size, items: Vec<LayoutItem> },
     Widget(Size),
 }
 
+#[derive(Debug, Clone)]
+pub struct Allocation {
+    pub widget_alloc: Vec<Rect>,
+    pub frame_alloc: Vec<Rect>,
+}
+
 impl LayoutItem {
-    pub fn allocate(&self, alloc: &Rect, layout: &mut Vec<Rect>) {
+    pub fn allocate(&self, alloc: &Rect, frame: &mut Vec<Rect>, widgets: &mut Vec<Rect>) {
         match self {
             Self::Rows { items, .. } | Self::Columns { items, .. } => {
+                frame.push(*alloc);
+
                 let is_row = matches!(self, Self::Rows { .. });
 
                 let allocation = if is_row { alloc.height } else { alloc.width };
@@ -63,13 +72,13 @@ impl LayoutItem {
 
                     curr += unit_alloc;
 
-                    item.allocate(&item_alloc, layout);
-
-                    layout.push(item_alloc);
+                    item.allocate(&item_alloc, frame, widgets);
                 }
             }
 
-            Self::Widget(_) => {}
+            Self::Widget(_) => {
+                widgets.push(*alloc);
+            }
         }
     }
 
@@ -113,6 +122,20 @@ impl Size {
     }
 }
 
+impl Rect {
+    pub fn allocate(&self, layout: &LayoutItem) -> Allocation {
+        let mut widget_alloc = Vec::new();
+        let mut frame_alloc = Vec::new();
+
+        layout.allocate(self, &mut frame_alloc, &mut widget_alloc);
+
+        Allocation {
+            widget_alloc,
+            frame_alloc,
+        }
+    }
+}
+
 pub fn layout(rows: Vec<LayoutItem>) -> LayoutItem {
     LayoutItem::Rows {
         unit: Size::Percent(100),

src/main.rs

@@ -1,13 +1,10 @@
-use pulse_ui::layout::{LayoutItem, Rect, Size};
+use pulse_ui::layout::{LayoutItem, Rect, Size, layout};
 
 fn main() {
-    let layout = LayoutItem::Columns {
-        unit: Size::Percent(100),
-        items: vec![
-            LayoutItem::Widget(Size::Flex(16)),
-            LayoutItem::Widget(Size::Flex(9)),
-        ],
-    };
+    let layout = layout(vec![
+        LayoutItem::Widget(Size::Flex(16)),
+        LayoutItem::Widget(Size::Flex(9)),
+    ]);
 
     let screen = Rect {
         x: 0,
@@ -16,9 +13,5 @@ fn main() {
         height: 3000,
     };
 
-    let mut layout_alloc = Vec::new();
-
-    layout.allocate(&screen, &mut layout_alloc);
-
-    println!("{:?}", layout_alloc);
+    println!("{:?}", screen.allocate(&layout));
 }