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use std::{error::Error, fmt};
use crate::{Proj, ProjError};
pub trait Transform<T> {
type Output;
#[cfg_attr(
feature = "geo-types",
doc = r##"
# Examples
Transform a geometry using a PROJ string definition:
```
use geo_types;
use proj::{Proj, Transform};
# use approx::assert_relative_eq;
let mut point = geo_types::point!(x: -36.508f32, y: -54.2815f32);
let proj = Proj::new("+proj=axisswap +order=2,1,3,4").expect("invalid proj string");
point.transform(&proj);
assert_relative_eq!(
point,
geo_types::point!(x: -54.2815f32, y: -36.508f32)
);
```
"##
)]
fn transform(&mut self, proj: &Proj) -> Result<(), ProjError>;
#[cfg_attr(
feature = "geo-types",
doc = r##"
# Examples
Transform a geometry using a PROJ string definition:
```
use geo_types;
use proj::{Proj, Transform};
# use approx::assert_relative_eq;
let point = geo_types::point!(x: -36.508f32, y: -54.2815f32);
let proj = Proj::new("+proj=axisswap +order=2,1,3,4").expect("invalid proj string");
assert_relative_eq!(
point.transformed(&proj).unwrap(),
geo_types::point!(x: -54.2815f32, y: -36.508f32)
);
// original `point` is untouched
assert_relative_eq!(
point,
geo_types::point!(x: -36.508f32, y: -54.2815f32)
);
```
"##
)]
fn transformed(&self, proj: &Proj) -> Result<Self::Output, ProjError>;
#[cfg_attr(
feature = "geo-types",
doc = r##"
# Examples
```
# use approx::assert_relative_eq;
use proj::Transform;
use geo_types::{point, Point};
let mut point: Point<f32> = point!(x: -36.508f32, y: -54.2815f32);
point.transform_crs_to_crs("EPSG:4326", "EPSG:3857").unwrap();
assert_relative_eq!(point, point!(x: -4064052.0f32, y: -7223650.5f32));
```
"##
)]
fn transform_crs_to_crs(
&mut self,
source_crs: &str,
target_crs: &str,
) -> Result<(), TransformError> {
let proj = Proj::new_known_crs(source_crs, target_crs, None)?;
Ok(self.transform(&proj)?)
}
#[cfg_attr(
feature = "geo-types",
doc = r##"
# Examples
```
# use approx::assert_relative_eq;
use proj::Transform;
use geo_types::{point, Point};
let mut point: Point<f32> = point!(x: -36.508f32, y: -54.2815f32);
assert_relative_eq!(
point.transformed_crs_to_crs("EPSG:4326", "EPSG:3857").unwrap(),
point!(x: -4064052.0f32, y: -7223650.5f32)
);
```
"##
)]
fn transformed_crs_to_crs(
&self,
source_crs: &str,
target_crs: &str,
) -> Result<Self::Output, TransformError> {
let proj = Proj::new_known_crs(source_crs, target_crs, None)?;
Ok(self.transformed(&proj)?)
}
}
#[derive(Debug)]
pub enum TransformError {
ProjCreateError(crate::ProjCreateError),
ProjError(crate::ProjError),
}
impl From<crate::ProjError> for TransformError {
fn from(e: crate::ProjError) -> Self {
TransformError::ProjError(e)
}
}
impl From<crate::ProjCreateError> for TransformError {
fn from(e: crate::ProjCreateError) -> Self {
TransformError::ProjCreateError(e)
}
}
impl fmt::Display for TransformError {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match self {
TransformError::ProjCreateError(err) => err.fmt(f),
TransformError::ProjError(err) => err.fmt(f),
}
}
}
impl Error for TransformError {}