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-rw-r--r--helix-view/src/tree.rs17
1 files changed, 17 insertions, 0 deletions
diff --git a/helix-view/src/tree.rs b/helix-view/src/tree.rs
index eaf1dbd2..72f6af57 100644
--- a/helix-view/src/tree.rs
+++ b/helix-view/src/tree.rs
@@ -270,10 +270,18 @@ impl Tree {
})
}
+ /// Get reference to a [`view`] by index.
+ /// # Panics
+ ///
+ /// Panics if `index` is not in self.nodes, or if the node's content is not [`Content::View`] . This can be checked with [`contains`]
pub fn get(&self, index: ViewId) -> &View {
self.try_get(index).unwrap()
}
+ /// Try to get reference to a [`view`] by index. Returns `None` if node content is not a [`Content::View`]
+ /// # Panics
+ ///
+ /// Panics if `index` is not in self.nodes. This can be checked with [`Self::contains`]
pub fn try_get(&self, index: ViewId) -> Option<&View> {
match &self.nodes[index] {
Node {
@@ -284,6 +292,10 @@ impl Tree {
}
}
+ /// Get a mutable reference to a [`view`] by index.
+ /// # Panics
+ ///
+ /// Panics if `index` is not in self.nodes, or if the node's content is not [`Content::View`] . This can be checked with [`Self::contains`]
pub fn get_mut(&mut self, index: ViewId) -> &mut View {
match &mut self.nodes[index] {
Node {
@@ -294,6 +306,11 @@ impl Tree {
}
}
+ /// Check if tree contains a [`Node`] with a given index.
+ pub fn contains(&self, index: ViewId) -> bool {
+ self.nodes.contains_key(index)
+ }
+
pub fn is_empty(&self) -> bool {
match &self.nodes[self.root] {
Node {