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use std::fmt::Display;
use super::{aspect_ratio::AspectRatio, gravity::Gravity};
#[derive(Debug, Clone)]
pub enum CropMode {
/// Creates an asset with the exact specified width and AspectRatio without distorting the asset. This option first
/// scales as much as needed to fill the specified dimensions. If the requested aspect ratio is
/// different than the original, cropping will occur on the dimension that exceeds the requested size after
/// scaling. You can specify which part of the original asset you want to keep if cropping occurs using the
/// gravity (set to 'center' by default).
FillByWidth {
width: u32,
ar: Option<AspectRatio>,
gravity: Option<Gravity>,
},
/// Same as FillByWidth, but uses the original height instead of the original width to calculate the aspect ratio.
FillByHeight {
height: u32,
ar: Option<AspectRatio>,
gravity: Option<Gravity>,
},
/// Creates an asset with the exact specified width and height without distorting the asset. This option first
/// scales as much as needed to fill the specified dimensions. If the requested aspect ratio is
/// different than the original, cropping will occur on the dimension that exceeds the requested size after
/// scaling. You can specify which part of the original asset you want to keep if cropping occurs using the
/// gravity (set to 'center' by default).
Fill {
width: u32,
height: u32,
gravity: Option<Gravity>,
},
}
impl Display for CropMode {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
match self {
CropMode::FillByWidth { width, ar, gravity } => write!(
f,
"{}c_fill{},w_{}",
ar.as_ref()
.map(|ar| format!("{},", ar))
.unwrap_or("".into()),
gravity
.as_ref()
.map(|g| format!(",{}", g))
.unwrap_or("".into()),
width,
),
CropMode::FillByHeight {
height,
ar,
gravity,
} => write!(
f,
"{}c_fill{},h_{}",
ar.as_ref()
.map(|ar| format!("{},", ar))
.unwrap_or("".into()),
gravity
.as_ref()
.map(|g| format!(",{}", g))
.unwrap_or("".into()),
height,
),
CropMode::Fill {
width,
height,
gravity,
} => write!(
f,
"c_fill{},w_{},h_{}",
gravity
.as_ref()
.map(|g| format!(",{}", g))
.unwrap_or("".into()),
width,
height,
),
}
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_fill_by_width() {
assert_eq!(
CropMode::FillByWidth {
width: 100,
ar: None,
gravity: None,
}
.to_string(),
"c_fill,w_100"
);
assert_eq!(
CropMode::FillByWidth {
width: 100,
ar: Some(AspectRatio::Ignore),
gravity: None,
}
.to_string(),
"fl_ignore_aspect_ratio,c_fill,w_100"
);
assert_eq!(
CropMode::FillByWidth {
width: 100,
ar: Some(AspectRatio::Sides(16, 9)),
gravity: Some(Gravity::North),
}
.to_string(),
"ar_16:9,c_fill,g_north,w_100"
);
}
#[test]
fn test_fill_by_height() {
assert_eq!(
CropMode::FillByHeight {
height: 100,
ar: None,
gravity: None,
}
.to_string(),
"c_fill,h_100"
);
assert_eq!(
CropMode::FillByHeight {
height: 100,
ar: Some(AspectRatio::Ignore),
gravity: None,
}
.to_string(),
"fl_ignore_aspect_ratio,c_fill,h_100"
);
assert_eq!(
CropMode::FillByHeight {
height: 100,
ar: Some(AspectRatio::Sides(16, 9)),
gravity: Some(Gravity::North),
}
.to_string(),
"ar_16:9,c_fill,g_north,h_100"
);
}
#[test]
fn test_fill() {
assert_eq!(
CropMode::Fill {
width: 100,
height: 100,
gravity: None,
}
.to_string(),
"c_fill,w_100,h_100"
);
assert_eq!(
CropMode::Fill {
width: 100,
height: 100,
gravity: Some(Gravity::AutoClassic),
}
.to_string(),
"c_fill,g_auto:classic,w_100,h_100"
);
}
}