From d8e8d80402b0907fae6d0db78f45c76e55cb8292 Mon Sep 17 00:00:00 2001
From: Robbert van der Helm <mail@robbertvanderhelm.nl>
Date: Sat, 19 Mar 2022 00:38:26 +0100
Subject: [PATCH] Add helpers for keyboard modifiers in vizia

---
 nih_plug_vizia/src/widgets.rs      |  2 ++
 nih_plug_vizia/src/widgets/util.rs | 35 ++++++++++++++++++++++++++++++
 2 files changed, 37 insertions(+)
 create mode 100644 nih_plug_vizia/src/widgets/util.rs

diff --git a/nih_plug_vizia/src/widgets.rs b/nih_plug_vizia/src/widgets.rs
index bcbe075a..7ab5acc2 100644
--- a/nih_plug_vizia/src/widgets.rs
+++ b/nih_plug_vizia/src/widgets.rs
@@ -11,6 +11,8 @@ use std::sync::Arc;
 
 use vizia::{Context, Model};
 
+pub mod util;
+
 /// Register the default theme for the widgets exported by this module. This is automatically called
 /// for you when using [`create_vizia_editor()`][super::create_vizia_editor()].
 pub fn register_theme(cx: &mut Context) {
diff --git a/nih_plug_vizia/src/widgets/util.rs b/nih_plug_vizia/src/widgets/util.rs
new file mode 100644
index 00000000..3ae8ece3
--- /dev/null
+++ b/nih_plug_vizia/src/widgets/util.rs
@@ -0,0 +1,35 @@
+//! Utilities for writing VIZIA widgets.
+
+use vizia::Modifiers;
+
+/// An extension trait for [`Modifiers`] that adds platform-independent getters.
+pub trait ModifiersExt {
+    /// Returns true if the Command (on macOS) or Ctrl (on any other platform) key is pressed.
+    fn command(&self) -> bool;
+
+    /// Returns true if the Alt (or Option on macOS) key is pressed.
+    fn alt(&self) -> bool;
+
+    /// Returns true if the Shift key is pressed.
+    fn shift(&self) -> bool;
+}
+
+impl ModifiersExt for Modifiers {
+    fn command(&self) -> bool {
+        #[cfg(target_os = "macos")]
+        let result = self.contains(Modifiers::LOGO);
+
+        #[cfg(not(target_os = "macos"))]
+        let result = self.contains(Modifiers::CTRL);
+
+        result
+    }
+
+    fn alt(&self) -> bool {
+        self.contains(Modifiers::ALT)
+    }
+
+    fn shift(&self) -> bool {
+        self.contains(Modifiers::SHIFT)
+    }
+}