feat(inlayHint): implement inlayHint basic types

src/inlay_hint.rs

@@ -0,0 +1,253 @@
+#![cfg(feature = "proposed")]
+
+use crate::{
+    Command, Location, MarkupContent, Position, Range, StaticRegistrationOptions,
+    TextDocumentIdentifier, TextDocumentRegistrationOptions, TextEdit, WorkDoneProgressOptions,
+    WorkDoneProgressParams,
+};
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, Eq, PartialEq, Clone, Default, Deserialize, Serialize)]
+#[serde(rename_all = "camelCase")]
+pub struct InlayHintClientCapabilitiesResolveSupport {
+    /// The properties that a client can resolve lazily.
+    pub properties: Vec<String>,
+}
+
+/// Inlay hint client capabilities.
+///
+/// @since 3.17.0 - proposed state
+#[derive(Debug, Eq, PartialEq, Clone, Default, Deserialize, Serialize)]
+#[serde(rename_all = "camelCase")]
+pub struct InlayHintClientCapabilities {
+    /// Whether inlay hints support dynamic registration.
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub dynamic_registration: Option<bool>,
+
+    /// Indicates which properties a client can resolve lazily on a inlay
+    /// hint.
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub resolve_support: Option<InlayHintClientCapabilitiesResolveSupport>,
+}
+
+/// Inlay hint options used during static registration.
+///
+/// @since 3.17.0 - proposed state
+#[derive(Debug, Eq, PartialEq, Clone, Default, Deserialize, Serialize)]
+#[serde(rename_all = "camelCase")]
+pub struct InlayHintOptions {
+    #[serde(flatten)]
+    pub work_done_progress_options: WorkDoneProgressOptions,
+
+    /// The server provides support to resolve additional
+    /// information for an inlay hint item.
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub resolve_provider: Option<bool>,
+}
+
+/// Inlay hint options used during static or dynamic registration.
+///
+/// @since 3.17.0 - proposed state
+#[derive(Debug, Eq, PartialEq, Clone, Default, Deserialize, Serialize)]
+#[serde(rename_all = "camelCase")]
+pub struct InlayHintRegistrationOptions {
+    #[serde(flatten)]
+    pub inlay_hints_options: InlayHintOptions,
+
+    #[serde(flatten)]
+    pub text_document_registration_options: TextDocumentRegistrationOptions,
+
+    #[serde(flatten)]
+    pub static_registration_options: StaticRegistrationOptions,
+}
+
+/// A parameter literal used in inlay hint requests.
+///
+/// @since 3.17.0 - proposed state
+#[derive(Debug, Eq, PartialEq, Clone, Deserialize, Serialize)]
+#[serde(rename_all = "camelCase")]
+pub struct InlayHintParams {
+    #[serde(flatten)]
+    pub work_done_progress_params: WorkDoneProgressParams,
+
+    /// The text document.
+    pub text_document: TextDocumentIdentifier,
+
+    /// The visible document range for which inlay hints should be computed.
+    pub range: Range,
+}
+
+/// Inlay hint information.
+///
+/// @since 3.17.0 - proposed state
+#[derive(Debug, Clone, Deserialize, Serialize)]
+#[serde(rename_all = "camelCase")]
+pub struct InlayHint {
+    /// The position of this hint.
+    pub position: Position,
+
+    /// The label of this hint. A human readable string or an array of
+    /// InlayHintLabelPart label parts.
+    ///
+    /// *Note* that neither the string nor the label part can be empty.
+    pub label: InlayHintLabel,
+
+    /// The kind of this hint. Can be omitted in which case the client
+    /// should fall back to a reasonable default.
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub kind: Option<InlayHintKind>,
+
+    /// Optional text edits that are performed when accepting this inlay hint.
+    ///
+    /// *Note* that edits are expected to change the document so that the inlay
+    /// hint (or its nearest variant) is now part of the document and the inlay
+    /// hint itself is now obsolete.
+    ///
+    /// Depending on the client capability `inlayHint.resolveSupport` clients
+    /// might resolve this property late using the resolve request.
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub text_edits: Option<Vec<TextEdit>>,
+
+    /// The tooltip text when you hover over this item.
+    ///
+    /// Depending on the client capability `inlayHint.resolveSupport` clients
+    /// might resolve this property late using the resolve request.
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub tooltip: Option<InlayHintTooltip>,
+
+    /// Render padding before the hint.
+    ///
+    /// Note: Padding should use the editor's background color, not the
+    /// background color of the hint itself. That means padding can be used
+    /// to visually align/separate an inlay hint.
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub padding_left: Option<bool>,
+
+    /// Render padding after the hint.
+    ///
+    /// Note: Padding should use the editor's background color, not the
+    /// background color of the hint itself. That means padding can be used
+    /// to visually align/separate an inlay hint.
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub padding_right: Option<bool>,
+    // FIXME(sno2): add [`data`] field after [`LSPAny`] is implemented
+    // /// A data entry field that is preserved on a inlay hint between
+    // /// a `textDocument/inlayHint` and a `inlayHint/resolve` request.
+    // #[serde(skip_serializing_if = "Option::is_none")]
+    // pub data: Option<crate::LSPAny>,
+}
+
+#[derive(Debug, Clone, Deserialize, Serialize)]
+#[serde(untagged)]
+pub enum InlayHintLabel {
+    String(String),
+    LabelParts(Vec<InlayHintLabelPart>),
+}
+
+impl From<String> for InlayHintLabel {
+    #[inline]
+    fn from(from: String) -> Self {
+        Self::String(from)
+    }
+}
+
+impl From<Vec<InlayHintLabelPart>> for InlayHintLabel {
+    #[inline]
+    fn from(from: Vec<InlayHintLabelPart>) -> Self {
+        Self::LabelParts(from)
+    }
+}
+
+#[derive(Debug, Clone, Deserialize, Serialize)]
+#[serde(untagged)]
+pub enum InlayHintTooltip {
+    String(String),
+    MarkupContent(MarkupContent),
+}
+
+impl From<String> for InlayHintTooltip {
+    #[inline]
+    fn from(from: String) -> Self {
+        Self::String(from)
+    }
+}
+
+impl From<MarkupContent> for InlayHintTooltip {
+    #[inline]
+    fn from(from: MarkupContent) -> Self {
+        Self::MarkupContent(from)
+    }
+}
+
+/// An inlay hint label part allows for interactive and composite labels
+/// of inlay hints.
+#[derive(Debug, Clone, Default, Deserialize, Serialize)]
+#[serde(rename_all = "camelCase")]
+pub struct InlayHintLabelPart {
+    /// The value of this label part.
+    pub value: String,
+
+    /// The tooltip text when you hover over this label part. Depending on
+    /// the client capability `inlayHint.resolveSupport` clients might resolve
+    /// this property late using the resolve request.
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub tooltip: Option<InlayHintLabelPartTooltip>,
+
+    /// An optional source code location that represents this
+    /// label part.
+    ///
+    /// The editor will use this location for the hover and for code navigation
+    /// features: This part will become a clickable link that resolves to the
+    /// definition of the symbol at the given location (not necessarily the
+    /// location itself), it shows the hover that shows at the given location,
+    /// and it shows a context menu with further code navigation commands.
+    ///
+    /// Depending on the client capability `inlayHint.resolveSupport` clients
+    /// might resolve this property late using the resolve request.
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub location: Option<Location>,
+
+    /// An optional command for this label part.
+    ///
+    /// Depending on the client capability `inlayHint.resolveSupport` clients
+    /// might resolve this property late using the resolve request.
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub command: Option<Command>,
+}
+
+#[derive(Debug, Eq, PartialEq, Clone, Deserialize, Serialize)]
+#[serde(untagged)]
+pub enum InlayHintLabelPartTooltip {
+    String(String),
+    MarkupContent(MarkupContent),
+}
+
+impl From<String> for InlayHintLabelPartTooltip {
+    #[inline]
+    fn from(from: String) -> Self {
+        Self::String(from)
+    }
+}
+
+impl From<MarkupContent> for InlayHintLabelPartTooltip {
+    #[inline]
+    fn from(from: MarkupContent) -> Self {
+        Self::MarkupContent(from)
+    }
+}
+
+/// Inlay hint kinds.
+///
+/// @since 3.17.0 - proposed state
+#[derive(Eq, PartialEq, Copy, Clone, Serialize, Deserialize)]
+#[serde(transparent)]
+pub struct InlayHintKind(i32);
+lsp_enum! {
+impl InlayHintKind {
+    /// An inlay hint that for a type annotation.
+    pub const TYPE: InlayHintKind = InlayHintKind(1);
+
+    /// An inlay hint that is for a parameter.
+    pub const PARAMETER: InlayHintKind = InlayHintKind(2);
+}
+}

src/lib.rs

@@ -144,6 +144,11 @@ pub use formatting::*;
 mod hover;
 pub use hover::*;
 
+#[cfg(feature = "proposed")]
+mod inlay_hint;
+#[cfg(feature = "proposed")]
+pub use inlay_hint::*;
+
 mod moniker;
 pub use moniker::*;
 
@@ -1451,6 +1456,13 @@ pub struct TextDocumentClientCapabilities {
     /// @since 3.16.0
     #[serde(skip_serializing_if = "Option::is_none")]
     pub moniker: Option<MonikerClientCapabilities>,
+
+    /// Capabilities specific to the `textDocument/inlayHint` request.
+    ///
+    /// @since 3.17.0 - proposed state
+    #[serde(skip_serializing_if = "Option::is_none")]
+    #[cfg(feature = "proposed")]
+    pub inlay_hint: Option<InlayHintClientCapabilities>,
 }
 
 /// Where ClientCapabilities are currently empty: