feat: Implement the UIA Culture property (#631)

Author: mwcampbell

platforms/windows/Cargo.toml

@@ -26,6 +26,7 @@ windows-core = "0.61.0"
 version = "0.61.1"
 features = [
     "Win32_Foundation",
+    "Win32_Globalization",
     "Win32_Graphics_Gdi",
     "Win32_System_Com",
     "Win32_System_LibraryLoader",

platforms/windows/examples/hello_world.rs

@@ -95,6 +95,7 @@ impl InnerWindowState {
         if self.announcement.is_some() {
             node.push_child(ANNOUNCEMENT_ID);
         }
+        node.set_language("en");
         node
     }
 }

platforms/windows/src/node.rs

@@ -276,6 +276,10 @@ impl NodeWrapper<'_> {
         self.0.description()
     }
 
+    fn culture(&self) -> Option<LocaleName<'_>> {
+        self.0.language().map(LocaleName)
+    }
+
     fn placeholder(&self) -> Option<&str> {
         self.0.placeholder()
     }
@@ -962,6 +966,7 @@ properties! {
     (UIA_LocalizedControlTypePropertyId, localized_control_type),
     (UIA_NamePropertyId, name),
     (UIA_FullDescriptionPropertyId, description),
+    (UIA_CulturePropertyId, culture),
     (UIA_HelpTextPropertyId, placeholder),
     (UIA_IsContentElementPropertyId, is_content_element),
     (UIA_IsControlElementPropertyId, is_content_element),

platforms/windows/src/util.rs

@@ -14,6 +14,7 @@ use windows::{
     core::*,
     Win32::{
         Foundation::*,
+        Globalization::*,
         Graphics::Gdi::*,
         System::{Com::*, Ole::*, Variant::*},
         UI::{Accessibility::*, WindowsAndMessaging::*},
@@ -43,6 +44,16 @@ impl From<WideString> for BSTR {
     }
 }
 
+#[derive(Debug, PartialEq, Eq)]
+pub(crate) struct LocaleName<'a>(pub(crate) &'a str);
+
+impl From<LocaleName<'_>> for Variant {
+    fn from(value: LocaleName) -> Self {
+        let lcid = unsafe { LocaleNameToLCID(&HSTRING::from(value.0), LOCALE_ALLOW_NEUTRAL_NAMES) };
+        (lcid != 0).then_some(lcid as i32).into()
+    }
+}
+
 pub(crate) struct Variant(VARIANT);
 
 impl From<Variant> for VARIANT {