Rename module input to avoid naming conflict with element of the same name

Not sure if this was supposed to be allowed, but it was causing https://github.com/rust-lang/rust/issues/96934

packages/html/src/input_data.rs

@@ -0,0 +1,120 @@
+//! Data structures representing user input, such as modifier keys and mouse buttons
+use enumset::{EnumSet, EnumSetType};
+
+/// A re-export of keyboard_types
+pub use keyboard_types;
+
+/// A mouse button type (such as Primary/Secondary)
+// note: EnumSetType also derives Copy and Clone for some reason
+#[derive(EnumSetType, Debug)]
+#[cfg_attr(feature = "serialize", derive(serde::Serialize, serde::Deserialize))]
+pub enum MouseButton {
+    /// Primary button (typically the left button)
+    Primary,
+    /// Secondary button (typically the right button)
+    Secondary,
+    /// Auxiliary button (typically the middle button)
+    Auxiliary,
+    /// Fourth button (typically the "Browser Back" button)
+    Fourth,
+    /// Fifth button (typically the "Browser Forward" button)
+    Fifth,
+    /// A button with an unknown code
+    Unknown,
+}
+
+impl MouseButton {
+    /// Constructs a MouseButton for the specified button code
+    ///
+    /// E.g. 0 => Primary; 1 => Auxiliary
+    ///
+    /// Unknown codes get mapped to MouseButton::Unknown.
+    pub fn from_web_code(code: i16) -> Self {
+        match code {
+            0 => MouseButton::Primary,
+            // not a typo; auxiliary and secondary are swapped unlike in the `buttons` field.
+            // https://developer.mozilla.org/en-US/docs/Web/API/MouseEvent/button
+            1 => MouseButton::Auxiliary,
+            2 => MouseButton::Secondary,
+            3 => MouseButton::Fourth,
+            4 => MouseButton::Fifth,
+            _ => MouseButton::Unknown,
+        }
+    }
+
+    /// Converts MouseButton into the corresponding button code
+    ///
+    /// MouseButton::Unknown will get mapped to -1
+    pub fn into_web_code(self) -> i16 {
+        match self {
+            MouseButton::Primary => 0,
+            // not a typo; auxiliary and secondary are swapped unlike in the `buttons` field.
+            // https://developer.mozilla.org/en-US/docs/Web/API/MouseEvent/button
+            MouseButton::Auxiliary => 1,
+            MouseButton::Secondary => 2,
+            MouseButton::Fourth => 3,
+            MouseButton::Fifth => 4,
+            MouseButton::Unknown => -1,
+        }
+    }
+}
+
+/// A set of mouse buttons
+pub type MouseButtonSet = EnumSet<MouseButton>;
+
+pub fn decode_mouse_button_set(code: u16) -> MouseButtonSet {
+    let mut set = EnumSet::empty();
+
+    // https://developer.mozilla.org/en-US/docs/Web/API/MouseEvent/buttons
+    #[allow(deprecated)]
+    {
+        if code & 0b1 != 0 {
+            set |= MouseButton::Primary;
+        }
+        if code & 0b10 != 0 {
+            set |= MouseButton::Secondary;
+        }
+        if code & 0b100 != 0 {
+            set |= MouseButton::Auxiliary;
+        }
+        if code & 0b1000 != 0 {
+            set |= MouseButton::Fourth;
+        }
+        if code & 0b10000 != 0 {
+            set |= MouseButton::Fifth;
+        }
+        if code & (!0b11111) != 0 {
+            set |= MouseButton::Unknown;
+        }
+    }
+
+    set
+}
+
+pub fn encode_mouse_button_set(set: MouseButtonSet) -> u16 {
+    let mut code = 0;
+
+    // https://developer.mozilla.org/en-US/docs/Web/API/MouseEvent/buttons
+    {
+        if set.contains(MouseButton::Primary) {
+            code |= 0b1;
+        }
+        if set.contains(MouseButton::Secondary) {
+            code |= 0b10;
+        }
+        if set.contains(MouseButton::Auxiliary) {
+            code |= 0b100;
+        }
+        if set.contains(MouseButton::Fourth) {
+            code |= 0b1000;
+        }
+        if set.contains(MouseButton::Fifth) {
+            code |= 0b10000;
+        }
+        if set.contains(MouseButton::Unknown) {
+            code |= 0b100000;
+        }
+    }
+
+    code
+}