Parameter inlay hint separate from variable type inlay? #2876

Add setting to allow enabling either type inlay hints or parameter
inlay hints or both. Group the the max inlay hint length option
into the object.

- Add a new type for the inlayHint options.
- Add tests to ensure the inlays don't happen on the server side

1 files changed, 29 insertions, 0 deletions

diff --git a/crates/ra_project_model/src/lib.rs b/crates/ra_project_model/src/lib.rs
index 37845ca56..a5012c0ef 100644
--- a/crates/ra_project_model/src/lib.rs
+++ b/crates/ra_project_model/src/lib.rs
@@ -16,6 +16,7 @@ use anyhow::{bail, Context, Result};
 use ra_cfg::CfgOptions;
 use ra_db::{CrateGraph, CrateName, Edition, Env, FileId};
 use rustc_hash::FxHashMap;
+use serde::Deserialize;
 use serde_json::from_reader;
 
 pub use crate::{
@@ -24,6 +25,34 @@ pub use crate::{
     sysroot::Sysroot,
 };
 
+#[derive(Deserialize, Clone, Debug, PartialEq, Eq)]
+#[serde(rename_all = "lowercase")]
+pub enum InlayHintDisplayType {
+    Off,
+    TypeHints,
+    ParameterHints,
+    Full,
+}
+
+#[derive(Deserialize, Clone, Debug, PartialEq, Eq)]
+#[serde(rename_all = "camelCase", default)]
+pub struct InlayHintOptions {
+    pub display_type: InlayHintDisplayType,
+    pub max_length: Option<usize>,
+}
+
+impl InlayHintOptions {
+    pub fn new(max_length: Option<usize>) -> Self {
+        Self { display_type: InlayHintDisplayType::Full, max_length }
+    }
+}
+
+impl Default for InlayHintOptions {
+    fn default() -> Self {
+        Self { display_type: InlayHintDisplayType::Full, max_length: None }
+    }
+}
+
 #[derive(Clone, PartialEq, Eq, Hash, Debug)]
 pub struct CargoTomlNotFoundError {
     pub searched_at: PathBuf,