Add ToolData and rectangle tool (#64)

core/document/src/lib.rs

@@ -1,11 +1,12 @@
 pub mod operation;
 
-pub use kurbo::{Circle, Point};
+pub use kurbo::{Circle, Point, Rect};
 pub use operation::Operation;
 
 #[derive(Debug, Clone, PartialEq)]
 pub enum SvgElement {
 	Circle(Circle),
+	Rect(Rect),
 }
 
 impl SvgElement {
@@ -14,6 +15,9 @@ impl SvgElement {
 			Self::Circle(c) => {
 				format!(r#"<circle cx="{}" cy="{}" r="{}" style="fill: #fff;" />"#, c.center.x, c.center.y, c.radius)
 			}
+			Self::Rect(r) => {
+				format!(r#"<rect x="{}" y="{}" width="{}" height="{}" style="fill: #fff;" />"#, r.min_x(), r.min_y(), r.width(), r.height())
+			}
 		}
 	}
 }
@@ -36,6 +40,11 @@ impl Document {
 					radius: r,
 				}));
 
+				update_frontend(self.render());
+			}
+			Operation::AddRect { x0, y0, x1, y1 } => {
+				self.svg.push(SvgElement::Rect(Rect::from_points(Point::new(x0, y0), Point::new(x1, y1))));
+
 				update_frontend(self.render());
 			}
 		}

core/document/src/operation.rs

@@ -1,3 +1,4 @@
 pub enum Operation {
 	AddCircle { cx: f64, cy: f64, r: f64 },
+	AddRect { x0: f64, y0: f64, x1: f64, y1: f64 },
 }