feat: impl crate::registry::property::Var::var_hint for all global enums

Author: LviatYi

godot-codegen/src/generator/enums.rs

@@ -11,6 +11,7 @@
 
 use std::collections::HashSet;
 
+use heck::{ToPascalCase, ToShoutySnakeCase};
 use proc_macro2::TokenStream;
 use quote::{quote, ToTokens};
 
@@ -45,6 +46,7 @@ pub fn make_enum_definition_with(
     // Things needed for the type definition
     let derives = enum_.derives();
     let enum_doc = make_enum_doc(enum_);
+    let enum_hint_string = make_enum_hint_string(enum_);
     let name = &enum_.name;
 
     // Values
@@ -152,6 +154,13 @@ pub fn make_enum_definition_with(
                 }
 
                 #var_trait_set_property
+                
+                fn var_hint() -> crate::meta::PropertyHintInfo{
+                    crate::meta::PropertyHintInfo{
+                        hint: crate::global::PropertyHint::ENUM,
+                        hint_string: #enum_hint_string.into(), 
+                    }
+                }
             }
 
             impl crate::registry::property::Export for #name {}
@@ -505,6 +514,23 @@ fn make_enum_doc(enum_: &Enum) -> Vec<String> {
 
     docs
 }
+/// Returns the hint string for the given enum.
+///
+/// Separate with commas, and remove the `<ENUM_NAME>_` prefix (if possible). 
+/// e.g.: "Left,Center,Right,Fill"
+fn make_enum_hint_string(enum_: &Enum) -> String {
+    let upper_cast_enum_name = enum_.godot_name.to_shouty_snake_case() + "_";
+    enum_.enumerators
+         .iter()
+         .map(|enumerator| {
+             enumerator.godot_name
+                       .clone()
+                       .trim_start_matches(upper_cast_enum_name.as_str())
+                       .to_pascal_case()
+         })
+         .collect::<Vec<String>>()
+         .join(",")
+}
 
 /// Creates a definition for `enumerator` of the type `enum_type`.
 ///