Feat: LSP Type Hints (#5934)

* misc: missing inline, outdated link

* doc: Add new theme keys and config option to book

* fix: don't panic in Tree::try_get(view_id)

Necessary for later, where we could be receiving an LSP response
for a closed window, in which case we don't want to crash while
checking for its existence

* fix: reset idle timer on all mouse events

* refacto: Introduce Overlay::new and InlineAnnotation::new

* refacto: extract make_job_callback from Context::callback

* feat: add LSP display_inlay_hint option to config

* feat: communicate inlay hints support capabilities of helix to LSP server

* feat: Add function to request range of inlay hint from LSP

* feat: Save inlay hints in document, per view

* feat: Update inlay hints on document changes

* feat: Compute inlay hints on idle timeout

* nit: Add todo's about inlay hints for later

* fix: compute text annotations for current view in view.rs, not document.rs

* doc: Improve Document::text_annotations() description

* nit: getters don't use 'get_' in front

* fix: Drop inlay hints annotations on config refresh if necessary

* fix: padding theming for LSP inlay hints

* fix: tracking of outdated inlay hints should not be dependant on document revision (because of undos and such)

* fix: follow LSP spec and don't highlight padding as virtual text

* config: add some LSP inlay hint configs

1 files changed, 5 insertions, 6 deletions

diff --git a/helix-view/src/tree.rs b/helix-view/src/tree.rs
index 5ec2773d..e8afd204 100644
--- a/helix-view/src/tree.rs
+++ b/helix-view/src/tree.rs
@@ -278,16 +278,15 @@ impl Tree {
         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
+    /// Try to get reference to a [View] by index. Returns `None` if node content is not a [`Content::View`].
     ///
-    /// Panics if `index` is not in self.nodes. This can be checked with [Self::contains]
+    /// Does not panic if the view does not exists anymore.
     pub fn try_get(&self, index: ViewId) -> Option<&View> {
-        match &self.nodes[index] {
-            Node {
+        match self.nodes.get(index) {
+            Some(Node {
                 content: Content::View(view),
                 ..
-            } => Some(view),
+            }) => Some(view),
             _ => None,
         }
     }