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use crate::layout;
use crate::renderer;
use crate::svg::{self, Handle};
use crate::{
ContentFit, Element, Layout, Length, Point, Rectangle, Size, Vector, Widget,
};
use std::path::PathBuf;
#[derive(Debug, Clone)]
pub struct Svg {
handle: Handle,
width: Length,
height: Length,
content_fit: ContentFit,
}
impl Svg {
pub fn new(handle: impl Into<Handle>) -> Self {
Svg {
handle: handle.into(),
width: Length::Fill,
height: Length::Shrink,
content_fit: ContentFit::Contain,
}
}
pub fn from_path(path: impl Into<PathBuf>) -> Self {
Self::new(Handle::from_path(path))
}
pub fn width(mut self, width: Length) -> Self {
self.width = width;
self
}
pub fn height(mut self, height: Length) -> Self {
self.height = height;
self
}
pub fn content_fit(self, content_fit: ContentFit) -> Self {
Self {
content_fit,
..self
}
}
}
impl<Message, Renderer> Widget<Message, Renderer> for Svg
where
Renderer: svg::Renderer,
{
fn width(&self) -> Length {
self.width
}
fn height(&self) -> Length {
self.height
}
fn layout(
&self,
renderer: &Renderer,
limits: &layout::Limits,
) -> layout::Node {
let (width, height) = renderer.dimensions(&self.handle);
let image_size = Size::new(width as f32, height as f32);
let raw_size = limits
.width(self.width)
.height(self.height)
.resolve(image_size);
let full_size = self.content_fit.fit(image_size, raw_size);
let final_size = Size {
width: match self.width {
Length::Shrink => f32::min(raw_size.width, full_size.width),
_ => raw_size.width,
},
height: match self.height {
Length::Shrink => f32::min(raw_size.height, full_size.height),
_ => raw_size.height,
},
};
layout::Node::new(final_size)
}
fn draw(
&self,
renderer: &mut Renderer,
_style: &renderer::Style,
layout: Layout<'_>,
_cursor_position: Point,
_viewport: &Rectangle,
) {
let (width, height) = renderer.dimensions(&self.handle);
let image_size = Size::new(width as f32, height as f32);
let bounds = layout.bounds();
let adjusted_fit = self.content_fit.fit(image_size, bounds.size());
let render = |renderer: &mut Renderer| {
let offset = Vector::new(
(bounds.width - adjusted_fit.width).max(0.0) / 2.0,
(bounds.height - adjusted_fit.height).max(0.0) / 2.0,
);
let drawing_bounds = Rectangle {
width: adjusted_fit.width,
height: adjusted_fit.height,
..bounds
};
renderer.draw(self.handle.clone(), drawing_bounds + offset)
};
if adjusted_fit.width > bounds.width
|| adjusted_fit.height > bounds.height
{
renderer.with_layer(bounds, render);
} else {
render(renderer)
}
}
}
impl<'a, Message, Renderer> From<Svg> for Element<'a, Message, Renderer>
where
Renderer: svg::Renderer,
{
fn from(icon: Svg) -> Element<'a, Message, Renderer> {
Element::new(icon)
}
}