Present Servo BGRA hardware surfaces

third_party/gpui/src/shared_string.rs

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+use derive_more::{Deref, DerefMut};
+
+use schemars::JsonSchema;
+use serde::{Deserialize, Serialize};
+use std::{
+    borrow::{Borrow, Cow},
+    sync::Arc,
+};
+use util::arc_cow::ArcCow;
+
+/// A shared string is an immutable string that can be cheaply cloned in GPUI
+/// tasks. Essentially an abstraction over an `Arc<str>` and `&'static str`,
+#[derive(Deref, DerefMut, Eq, PartialEq, PartialOrd, Ord, Hash, Clone)]
+pub struct SharedString(ArcCow<'static, str>);
+
+impl SharedString {
+    /// Creates a static [`SharedString`] from a `&'static str`.
+    pub const fn new_static(str: &'static str) -> Self {
+        Self(ArcCow::Borrowed(str))
+    }
+
+    /// Creates a [`SharedString`] from anything that can become an `Arc<str>`
+    pub fn new(str: impl Into<Arc<str>>) -> Self {
+        SharedString(ArcCow::Owned(str.into()))
+    }
+
+    /// Get a &str from the underlying string.
+    pub fn as_str(&self) -> &str {
+        &self.0
+    }
+}
+
+impl JsonSchema for SharedString {
+    fn inline_schema() -> bool {
+        String::inline_schema()
+    }
+
+    fn schema_name() -> Cow<'static, str> {
+        String::schema_name()
+    }
+
+    fn json_schema(generator: &mut schemars::SchemaGenerator) -> schemars::Schema {
+        String::json_schema(generator)
+    }
+}
+
+impl Default for SharedString {
+    fn default() -> Self {
+        Self(ArcCow::Owned(Arc::default()))
+    }
+}
+
+impl AsRef<str> for SharedString {
+    fn as_ref(&self) -> &str {
+        &self.0
+    }
+}
+
+impl Borrow<str> for SharedString {
+    fn borrow(&self) -> &str {
+        self.as_ref()
+    }
+}
+
+impl std::fmt::Debug for SharedString {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        self.0.fmt(f)
+    }
+}
+
+impl std::fmt::Display for SharedString {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "{}", self.0.as_ref())
+    }
+}
+
+impl PartialEq<String> for SharedString {
+    fn eq(&self, other: &String) -> bool {
+        self.as_ref() == other
+    }
+}
+
+impl PartialEq<SharedString> for String {
+    fn eq(&self, other: &SharedString) -> bool {
+        self == other.as_ref()
+    }
+}
+
+impl PartialEq<str> for SharedString {
+    fn eq(&self, other: &str) -> bool {
+        self.as_ref() == other
+    }
+}
+
+impl<'a> PartialEq<&'a str> for SharedString {
+    fn eq(&self, other: &&'a str) -> bool {
+        self.as_ref() == *other
+    }
+}
+
+impl From<&SharedString> for SharedString {
+    fn from(value: &SharedString) -> Self {
+        value.clone()
+    }
+}
+
+impl From<SharedString> for Arc<str> {
+    fn from(val: SharedString) -> Self {
+        match val.0 {
+            ArcCow::Borrowed(borrowed) => Arc::from(borrowed),
+            ArcCow::Owned(owned) => owned,
+        }
+    }
+}
+
+impl<T: Into<ArcCow<'static, str>>> From<T> for SharedString {
+    fn from(value: T) -> Self {
+        Self(value.into())
+    }
+}
+
+impl From<SharedString> for String {
+    fn from(val: SharedString) -> Self {
+        val.0.to_string()
+    }
+}
+
+impl Serialize for SharedString {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: serde::Serializer,
+    {
+        serializer.serialize_str(self.as_ref())
+    }
+}
+
+impl<'de> Deserialize<'de> for SharedString {
+    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+    where
+        D: serde::Deserializer<'de>,
+    {
+        let s = String::deserialize(deserializer)?;
+        Ok(SharedString::from(s))
+    }
+}