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|
use crate::{
fragment::{marker_line, Bounds, Cell, Fragment, Line, Polygon},
Point,
};
use sauron::{html::attributes::class, Node};
use std::fmt;
#[derive(Debug, Clone, PartialEq)]
pub enum Marker {
// -->
Arrow,
// ---|>
ClearArrow,
// ----*
Circle,
// -----#
Square,
// \
// \
// #
Diamond,
// -----o
OpenCircle,
// -----O
BigOpenCircle,
}
impl Marker {
fn is_arrow(&self) -> bool {
match self {
Marker::Arrow | Marker::ClearArrow => true,
_ => false,
}
}
}
#[derive(Debug, Clone, PartialEq)]
pub struct MarkerLine {
pub line: Line,
pub start_marker: Option<Marker>,
pub end_marker: Option<Marker>,
}
impl MarkerLine {
pub fn new(
a: Point,
b: Point,
is_broken: bool,
start_marker: Option<Marker>,
end_marker: Option<Marker>,
) -> Self {
MarkerLine {
line: Line::new_noswap(a, b, is_broken),
start_marker,
end_marker,
}
}
pub fn absolute_position(&self, cell: Cell) -> Self {
MarkerLine {
line: self.line.absolute_position(cell),
start_marker: self.start_marker.clone(),
end_marker: self.end_marker.clone(),
}
}
pub fn align(&self) -> Self {
MarkerLine {
line: self.line.align(),
start_marker: self.start_marker.clone(),
end_marker: self.end_marker.clone(),
}
}
pub fn scale(&self, scale: f32) -> Self {
MarkerLine {
line: self.line.scale(scale),
start_marker: self.start_marker.clone(),
end_marker: self.end_marker.clone(),
}
}
/// merge this marker line to the polygon
pub(crate) fn merge_polygon(&self, polygon: &Polygon) -> Option<Fragment> {
let poly_center = polygon.center();
let distance_end_center = self.line.end.distance(&poly_center);
let distance_start_center = self.line.start.distance(&poly_center);
let line_heading = self.line.heading();
let threshold_length = line_heading.threshold_length();
let is_close_start_point = distance_start_center < threshold_length;
let is_close_end_point = distance_end_center < threshold_length;
let is_same_direction = polygon.matched_direction(line_heading);
let is_opposite_direction =
polygon.matched_direction(line_heading.opposite());
let can_merge = (is_same_direction || is_opposite_direction)
&& (is_close_start_point || is_close_end_point);
if can_merge {
let marker = polygon.get_marker();
let start_marker =
if is_close_start_point && self.start_marker.is_none() {
marker.clone()
} else {
self.start_marker.clone()
};
let end_marker = if is_close_end_point && self.end_marker.is_none()
{
marker
} else {
self.end_marker.clone()
};
let extended_line = if is_close_start_point {
self.line.extend_start(threshold_length / 2.0)
} else if is_close_end_point {
self.line.extend(threshold_length / 2.0)
} else {
panic!("There is no endpoint close to the polygon");
};
Some(marker_line(
extended_line.start,
extended_line.end,
extended_line.is_broken,
start_marker,
end_marker,
))
} else {
None
}
}
}
impl Bounds for MarkerLine {
fn bounds(&self) -> (Point, Point) {
self.line.bounds()
}
}
impl fmt::Display for Marker {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match self {
Marker::Arrow => write!(f, "arrow"),
Marker::ClearArrow => write!(f, "clear_arrow"),
Marker::Circle => write!(f, "circle"),
Marker::Square => write!(f, "square"),
Marker::Diamond => write!(f, "diamond"),
Marker::OpenCircle => write!(f, "open_circle"),
Marker::BigOpenCircle => write!(f, "big_open_circle"),
}
}
}
impl fmt::Display for MarkerLine {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(
f,
"{} {:?} {:?}",
self.line, self.start_marker, self.end_marker
)
}
}
impl<MSG> Into<Node<MSG>> for MarkerLine {
fn into(self) -> Node<MSG> {
let node: Node<MSG> = self.line.into();
let mut classes = vec![];
if let Some(start_marker) = self.start_marker {
classes.push(class(format!("start_marked_{}", start_marker)));
}
if let Some(end_marker) = self.end_marker {
classes.push(class(format!("end_marked_{}", end_marker)));
}
node.add_attributes(classes)
}
}
|
