Split out four new crates (#5302)

1 files changed, 34 insertions, 0 deletions

diff --git a/crates/typst-library/src/layout/hide.rs b/crates/typst-library/src/layout/hide.rs
new file mode 100644
index 00000000..1b8b9bd5
--- /dev/null
+++ b/crates/typst-library/src/layout/hide.rs
@@ -0,0 +1,34 @@
+use crate::diag::SourceResult;
+use crate::engine::Engine;
+use crate::foundations::{elem, Content, Packed, Show, StyleChain};
+
+/// Hides content without affecting layout.
+///
+/// The `hide` function allows you to hide content while the layout still 'sees'
+/// it. This is useful to create whitespace that is exactly as large as some
+/// content. It may also be useful to redact content because its arguments are
+/// not included in the output.
+///
+/// # Example
+/// ```example
+/// Hello Jane \
+/// #hide[Hello] Joe
+/// ```
+#[elem(Show)]
+pub struct HideElem {
+    /// The content to hide.
+    #[required]
+    pub body: Content,
+
+    /// This style is set on the content contained in the `hide` element.
+    #[internal]
+    #[ghost]
+    pub hidden: bool,
+}
+
+impl Show for Packed<HideElem> {
+    #[typst_macros::time(name = "hide", span = self.span())]
+    fn show(&self, _: &mut Engine, _: StyleChain) -> SourceResult<Content> {
+        Ok(self.body().clone().styled(HideElem::set_hidden(true)))
+    }
+}