View plugins

src/view_plugins.rs

@@ -0,0 +1,41 @@
+use crate::{
+    render::{DrawContext, DrawInstruction},
+    View,
+};
+
+pub fn x_center(ctx: &mut DrawContext, _view: &View) {
+    ctx.allocated.y = (ctx.area.height - ctx.allocated.height) / 2;
+}
+
+pub fn y_center(ctx: &mut DrawContext, _view: &View) {
+    ctx.allocated.y = (ctx.area.height - ctx.allocated.height) / 2;
+}
+
+pub fn center(ctx: &mut DrawContext, _view: &View) {
+    ctx.allocated.x = (ctx.area.width - ctx.allocated.width) / 2;
+    ctx.allocated.y = (ctx.area.height - ctx.allocated.height) / 2;
+}
+
+pub fn size_auto(ctx: &mut DrawContext, _view: &View) {
+    for i in &ctx.drawing {
+        match i {
+            DrawInstruction::Text(_, text) => {
+                ctx.allocated.width = text.len() as u16;
+                ctx.allocated.height = 1;
+            }
+            DrawInstruction::View(area, view) => {
+                let mut c = DrawContext::new(area.clone());
+                view(&mut c);
+                size_auto(&mut c, view);
+                ctx.allocated.width = c.allocated.width;
+                ctx.allocated.height = c.allocated.height;
+            }
+            DrawInstruction::Child(_, _) => {}
+        }
+    }
+}
+
+pub fn redraw(ctx: &mut DrawContext, view: &View) {
+    ctx.clear();
+    ctx.draw_view(ctx.allocated.clone(), view.clone());
+}