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|
use crate::attributes::Point;
use crate::DotString;
use std::borrow::Cow;
pub struct ViewPort {
pub width: f32,
pub height: f32,
pub zoom: f32,
pub focus: Option<FocusType>
}
impl ViewPort {
pub fn new(width: f32, height: f32, zoom: Option<f32>, focus: Option<FocusType>) -> Self {
Self {
width,
height,
zoom: zoom.unwrap_or(1 as f32),
focus
}
}
pub fn new_point(width: f32, height: f32, zoom: Option<f32>, x: f32, y: f32) -> Self {
Self {
width,
height,
zoom: zoom.unwrap_or(1 as f32),
focus: Some(FocusType::Point(Point::new_2d(x, y)))
}
}
pub fn new_node(width: f32, height: f32, zoom: Option<f32>, node: String) -> Self {
Self {
width,
height,
zoom: zoom.unwrap_or(1 as f32),
focus: Some(FocusType::Node(node))
}
}
}
impl<'a> DotString<'a> for ViewPort {
fn dot_string(&self) -> Cow<'a, str> {
let mut dot_string = String::from("");
dot_string.push_str(
format!("{:.1},{:.1},{:.1}",
self.width, self.height, self.zoom
).as_str());
if let Some(focus) = &self.focus {
match focus {
FocusType::Point(p) => {
dot_string.push_str(format!(",{}", p.dot_string()).as_str());
},
FocusType::Node(n) => {
dot_string.push_str(format!(",'{}'", n).as_str());
},
}
}
dot_string.into()
}
}
pub enum FocusType {
Point(Point),
Node(String)
}
#[cfg(test)]
mod test {
use crate::attributes::{ViewPort};
use crate::DotString;
#[test]
fn viewport_dot_string() {
assert_eq!(
"1.0,2.0,1.0",
ViewPort::new(1.0, 2.0, None, None).dot_string()
);
}
#[test]
fn viewport_zoom_dot_string() {
assert_eq!(
"1.0,2.0,3.0",
ViewPort::new(1.0, 2.0, Some(3.0), None).dot_string()
);
}
#[test]
fn viewport_point_focus_dot_string() {
assert_eq!(
"1.0,2.0,3.0,5.0,10.0",
ViewPort::new_point(1.0, 2.0, Some(3.0), 5.0, 10.0).dot_string()
);
}
#[test]
fn viewport_node_focus_dot_string() {
assert_eq!(
"1.0,2.0,3.0,'2.8 BSD'",
ViewPort::new_node(
1.0, 2.0, Some(3.0), String::from("2.8 BSD")
).dot_string()
);
}
}
|
