Winit version 0.29.15

Don't crash when xsettings query fails with _present_ xsettings.

Closes: https://github.com/rust-windowing/winit/issues/3573

CHANGELOG.md

@@ -11,6 +11,10 @@ Unreleased` header.
 
 # Unreleased
 
+# 0.29.15
+
+- On X11, fix crash due to xsettings query on systems with incomplete xsettings.
+
 # 0.29.14
 
 - On X11/Wayland, fix `text` and `text_with_all_modifiers` not being `None` during compose.

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "winit"
-version = "0.29.14"
+version = "0.29.15"
 authors = ["The winit contributors", "Pierre Krieger <pierre.krieger1708@gmail.com>"]
 description = "Cross-platform window creation library."
 edition = "2021"

README.md

@@ -6,7 +6,7 @@
 
 ```toml
 [dependencies]
-winit = "0.29.14"
+winit = "0.29.15"
 ```
 
 ## [Documentation](https://docs.rs/winit)
@@ -156,7 +156,7 @@ For more details, refer to these `android-activity` [example applications](https
 
 If your application is currently based on `NativeActivity` via the `ndk-glue` crate and building with `cargo apk`, then the minimal changes would be:
 1. Remove `ndk-glue` from your `Cargo.toml`
-2. Enable the `"android-native-activity"` feature for Winit: `winit = { version = "0.29.14", features = [ "android-native-activity" ] }`
+2. Enable the `"android-native-activity"` feature for Winit: `winit = { version = "0.29.15", features = [ "android-native-activity" ] }`
 3. Add an `android_main` entrypoint (as above), instead of using the '`[ndk_glue::main]` proc macro from `ndk-macros` (optionally add a dependency on `android_logger` and initialize logging as above).
 4. Pass a clone of the `AndroidApp` that your application receives to Winit when building your event loop (as shown above).
 

src/platform_impl/linux/x11/mod.rs

@@ -891,6 +891,9 @@ pub enum X11Error {
 
     /// Unable to parse xsettings.
     XsettingsParse(xsettings::ParserError),
+
+    /// Failed to get property.
+    GetProperty(util::GetPropertyError),
 }
 
 impl fmt::Display for X11Error {
@@ -900,6 +903,7 @@ impl fmt::Display for X11Error {
             X11Error::Connect(e) => write!(f, "X11 connection error: {}", e),
             X11Error::Connection(e) => write!(f, "X11 connection error: {}", e),
             X11Error::XidsExhausted(e) => write!(f, "XID range exhausted: {}", e),
+            X11Error::GetProperty(e) => write!(f, "Failed to get X property {}", e),
             X11Error::X11(e) => write!(f, "X11 error: {:?}", e),
             X11Error::UnexpectedNull(s) => write!(f, "Xlib function returned null: {}", s),
             X11Error::InvalidActivationToken(s) => write!(
@@ -992,6 +996,12 @@ impl From<xsettings::ParserError> for X11Error {
     }
 }
 
+impl From<util::GetPropertyError> for X11Error {
+    fn from(value: util::GetPropertyError) -> Self {
+        Self::GetProperty(value)
+    }
+}
+
 /// Type alias for a void cookie.
 type VoidCookie<'a> = x11rb::cookie::VoidCookie<'a, X11rbConnection>;
 

src/platform_impl/linux/x11/util/randr.rs

@@ -52,6 +52,7 @@ impl XConnection {
             .get_string("Xft.dpi", "")
             .and_then(|s| f64::from_str(s).ok())
     }
+
     pub fn get_output_info(
         &self,
         resources: &monitor::ScreenResources,

src/platform_impl/linux/x11/util/window_property.rs

@@ -1,13 +1,18 @@
-use super::*;
-use bytemuck::{NoUninit, Pod};
+use std::error::Error;
+use std::fmt;
 use std::sync::Arc;
 
+use bytemuck::{NoUninit, Pod};
+
 use x11rb::connection::Connection;
 use x11rb::errors::ReplyError;
 
-pub type Cardinal = u32;
+use super::*;
+
 pub const CARDINAL_SIZE: usize = mem::size_of::<u32>();
 
+pub type Cardinal = u32;
+
 #[derive(Debug, Clone)]
 pub enum GetPropertyError {
     X11rbError(Arc<ReplyError>),
@@ -15,12 +20,6 @@ pub enum GetPropertyError {
     FormatMismatch(c_int),
 }
 
-impl<T: Into<ReplyError>> From<T> for GetPropertyError {
-    fn from(e: T) -> Self {
-        Self::X11rbError(Arc::new(e.into()))
-    }
-}
-
 impl GetPropertyError {
     pub fn is_actual_property_type(&self, t: xproto::Atom) -> bool {
         if let GetPropertyError::TypeMismatch(actual_type) = *self {
@@ -31,6 +30,24 @@ impl GetPropertyError {
     }
 }
 
+impl<T: Into<ReplyError>> From<T> for GetPropertyError {
+    fn from(e: T) -> Self {
+        Self::X11rbError(Arc::new(e.into()))
+    }
+}
+
+impl fmt::Display for GetPropertyError {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            GetPropertyError::X11rbError(err) => err.fmt(f),
+            GetPropertyError::TypeMismatch(err) => write!(f, "type mismatch: {err}"),
+            GetPropertyError::FormatMismatch(err) => write!(f, "format mismatch: {err}"),
+        }
+    }
+}
+
+impl Error for GetPropertyError {}
+
 // Number of 32-bit chunks to retrieve per iteration of get_property's inner loop.
 // To test if `get_property` works correctly, set this to 1.
 const PROPERTY_BUFFER_SIZE: u32 = 1024; // 4k of RAM ought to be enough for anyone!

src/platform_impl/linux/x11/xsettings.rs

@@ -33,13 +33,11 @@ impl XConnection {
             .reply()?;
 
         // Read the _XSETTINGS_SETTINGS property.
-        let data: Vec<u8> = self
-            .get_property(
-                owner.owner,
-                atoms[_XSETTINGS_SETTINGS],
-                atoms[_XSETTINGS_SETTINGS],
-            )
-            .unwrap();
+        let data: Vec<u8> = self.get_property(
+            owner.owner,
+            atoms[_XSETTINGS_SETTINGS],
+            atoms[_XSETTINGS_SETTINGS],
+        )?;
 
         // Parse the property.
         let dpi_setting = read_settings(&data)?