diff options
| author | Laurenz <laurmaedje@gmail.com> | 2022-02-28 15:50:48 +0100 |
|---|---|---|
| committer | Laurenz <laurmaedje@gmail.com> | 2022-02-28 23:54:34 +0100 |
| commit | 3ca5b238238e1128aa7bbfbd5db9e632045d8600 (patch) | |
| tree | 2471f4b340a15695b7f4d518c0b39fabaea676c4 /src/library/image.rs | |
| parent | b63c21c91d99a1554a019dc275f955d3e6a34271 (diff) | |
Reorganize library
Diffstat (limited to 'src/library/image.rs')
| -rw-r--r-- | src/library/image.rs | 118 |
1 files changed, 0 insertions, 118 deletions
diff --git a/src/library/image.rs b/src/library/image.rs deleted file mode 100644 index c1220734..00000000 --- a/src/library/image.rs +++ /dev/null @@ -1,118 +0,0 @@ -//! Raster and vector graphics. - -use super::prelude::*; -use super::TextNode; -use crate::diag::Error; -use crate::image::ImageId; - -/// Show a raster or vector graphic. -#[derive(Debug, Hash)] -pub struct ImageNode(pub ImageId); - -#[class] -impl ImageNode { - /// How the image should adjust itself to a given area. - pub const FIT: ImageFit = ImageFit::Cover; - - fn construct(ctx: &mut Context, args: &mut Args) -> TypResult<Template> { - let path = args.expect::<Spanned<EcoString>>("path to image file")?; - let full = ctx.resolve(&path.v); - let id = ctx.images.load(&full).map_err(|err| { - Error::boxed(path.span, match err.kind() { - std::io::ErrorKind::NotFound => "file not found".into(), - _ => format!("failed to load image ({})", err), - }) - })?; - - let width = args.named("width")?; - let height = args.named("height")?; - - Ok(Template::inline( - ImageNode(id).pack().sized(Spec::new(width, height)), - )) - } -} - -impl Layout for ImageNode { - fn layout( - &self, - ctx: &mut Context, - regions: &Regions, - styles: StyleChain, - ) -> TypResult<Vec<Arc<Frame>>> { - let img = ctx.images.get(self.0); - let pxw = img.width() as f64; - let pxh = img.height() as f64; - let px_ratio = pxw / pxh; - - // Find out whether the image is wider or taller than the target size. - let &Regions { first, expand, .. } = regions; - let region_ratio = first.x / first.y; - let wide = px_ratio > region_ratio; - - // The space into which the image will be placed according to its fit. - let target = if expand.x && expand.y { - first - } else if expand.x || (!expand.y && wide && first.x.is_finite()) { - Size::new(first.x, first.y.min(first.x.safe_div(px_ratio))) - } else if first.y.is_finite() { - Size::new(first.x.min(first.y * px_ratio), first.y) - } else { - Size::new(Length::pt(pxw), Length::pt(pxh)) - }; - - // Compute the actual size of the fitted image. - let fit = styles.get(Self::FIT); - let fitted = match fit { - ImageFit::Cover | ImageFit::Contain => { - if wide == (fit == ImageFit::Contain) { - Size::new(target.x, target.x / px_ratio) - } else { - Size::new(target.y * px_ratio, target.y) - } - } - ImageFit::Stretch => target, - }; - - // First, place the image in a frame of exactly its size and then resize - // the frame to the target size, center aligning the image in the - // process. - let mut frame = Frame::new(fitted); - frame.push(Point::zero(), Element::Image(self.0, fitted)); - frame.resize(target, Align::CENTER_HORIZON); - - // Create a clipping group if only part of the image should be visible. - if fit == ImageFit::Cover && !target.fits(fitted) { - frame.clip(); - } - - // Apply link if it exists. - if let Some(url) = styles.get_ref(TextNode::LINK) { - frame.link(url); - } - - Ok(vec![Arc::new(frame)]) - } -} - -/// How an image should adjust itself to a given area. -#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)] -pub enum ImageFit { - /// The image should completely cover the area. - Cover, - /// The image should be fully contained in the area. - Contain, - /// The image should be stretched so that it exactly fills the area. - Stretch, -} - -castable! { - ImageFit, - Expected: "string", - Value::Str(string) => match string.as_str() { - "cover" => Self::Cover, - "contain" => Self::Contain, - "stretch" => Self::Stretch, - _ => Err(r#"expected "cover", "contain" or "stretch""#)?, - }, -} |
