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use krilla::action::{Action, LinkAction};
use krilla::annotation::{LinkAnnotation, Target};
use krilla::destination::XyzDestination;
use krilla::geom::Rect;
use typst_library::layout::{Abs, Point, Size};
use typst_library::model::Destination;
use crate::convert::{FrameContext, GlobalContext};
use crate::util::{AbsExt, PointExt};
pub(crate) fn handle_link(
fc: &mut FrameContext,
gc: &mut GlobalContext,
dest: &Destination,
size: Size,
) {
let mut min_x = Abs::inf();
let mut min_y = Abs::inf();
let mut max_x = -Abs::inf();
let mut max_y = -Abs::inf();
let pos = Point::zero();
// Compute the bounding box of the transformed link.
for point in [
pos,
pos + Point::with_x(size.x),
pos + Point::with_y(size.y),
pos + size.to_point(),
] {
let t = point.transform(fc.state().transform());
min_x.set_min(t.x);
min_y.set_min(t.y);
max_x.set_max(t.x);
max_y.set_max(t.y);
}
let x1 = min_x.to_f32();
let x2 = max_x.to_f32();
let y1 = min_y.to_f32();
let y2 = max_y.to_f32();
let rect = Rect::from_ltrb(x1, y1, x2, y2).unwrap();
// TODO: Support quad points.
let pos = match dest {
Destination::Url(u) => {
fc.push_annotation(
LinkAnnotation::new(
rect,
None,
Target::Action(Action::Link(LinkAction::new(u.to_string()))),
)
.into(),
);
return;
}
Destination::Position(p) => *p,
Destination::Location(loc) => {
if let Some(nd) = gc.loc_to_names.get(loc) {
// If a named destination has been registered, it's already guaranteed to
// not point to an excluded page.
fc.push_annotation(
LinkAnnotation::new(
rect,
None,
Target::Destination(krilla::destination::Destination::Named(
nd.clone(),
)),
)
.into(),
);
return;
} else {
gc.document.introspector.position(*loc)
}
}
};
let page_index = pos.page.get() - 1;
if let Some(index) = gc.page_index_converter.pdf_page_index(page_index) {
fc.push_annotation(
LinkAnnotation::new(
rect,
None,
Target::Destination(krilla::destination::Destination::Xyz(
XyzDestination::new(index, pos.point.to_krilla()),
)),
)
.into(),
);
}
}
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