Backport official GLib iterator safety fix for Linux desktop

apps/desktop/src-tauri/vendor/glib/src/value_array.rs

@@ -0,0 +1,251 @@
+// Take a look at the license at the top of the repository in the LICENSE file.
+
+use std::{cmp::Ordering, ops, slice};
+
+use crate::{
+    prelude::*,
+    translate::*,
+    value::{
+        FromValue, GenericValueTypeOrNoneChecker, ToValueOptional, ValueType, ValueTypeOptional,
+    },
+    HasParamSpec, ParamSpecValueArray, ParamSpecValueArrayBuilder, Type, Value,
+};
+
+wrapper! {
+    #[derive(Debug)]
+    #[doc(alias = "GValueArray")]
+    pub struct ValueArray(Boxed<gobject_ffi::GValueArray>);
+
+    match fn {
+        copy => |ptr| gobject_ffi::g_value_array_copy(mut_override(ptr)),
+        free => |ptr| gobject_ffi::g_value_array_free(ptr),
+    }
+}
+
+impl ValueArray {
+    #[doc(alias = "g_value_array_new")]
+    pub fn new(n_prealloced: u32) -> ValueArray {
+        unsafe { from_glib_full(gobject_ffi::g_value_array_new(n_prealloced)) }
+    }
+
+    #[doc(alias = "g_value_array_append")]
+    pub fn append(&mut self, value: &Value) {
+        let value = value.to_glib_none();
+        unsafe {
+            gobject_ffi::g_value_array_append(self.to_glib_none_mut().0, value.0);
+        }
+    }
+
+    #[inline]
+    pub fn is_empty(&self) -> bool {
+        self.len() == 0
+    }
+
+    #[inline]
+    pub fn len(&self) -> usize {
+        self.inner.n_values as usize
+    }
+
+    #[doc(alias = "get_nth")]
+    #[doc(alias = "g_value_array_get_nth")]
+    pub fn nth(&self, index_: u32) -> Option<Value> {
+        unsafe {
+            from_glib_none(gobject_ffi::g_value_array_get_nth(
+                mut_override(self.to_glib_none().0),
+                index_,
+            ))
+        }
+    }
+
+    #[doc(alias = "g_value_array_insert")]
+    pub fn insert(&mut self, index_: u32, value: &Value) {
+        let value = value.to_glib_none();
+        unsafe {
+            gobject_ffi::g_value_array_insert(self.to_glib_none_mut().0, index_, value.0);
+        }
+    }
+
+    #[doc(alias = "g_value_array_prepend")]
+    pub fn prepend(&mut self, value: &Value) {
+        let value = value.to_glib_none();
+        unsafe {
+            gobject_ffi::g_value_array_prepend(self.to_glib_none_mut().0, value.0);
+        }
+    }
+
+    #[doc(alias = "g_value_array_remove")]
+    pub fn remove(&mut self, index_: u32) {
+        unsafe {
+            gobject_ffi::g_value_array_remove(self.to_glib_none_mut().0, index_);
+        }
+    }
+
+    #[doc(alias = "g_value_array_sort_with_data")]
+    pub fn sort_with_data<F: FnMut(&Value, &Value) -> Ordering>(&mut self, compare_func: F) {
+        unsafe extern "C" fn compare_func_trampoline(
+            a: ffi::gconstpointer,
+            b: ffi::gconstpointer,
+            func: ffi::gpointer,
+        ) -> i32 {
+            let func = func as *mut &mut (dyn FnMut(&Value, &Value) -> Ordering);
+
+            let a = &*(a as *const Value);
+            let b = &*(b as *const Value);
+
+            (*func)(a, b).into_glib()
+        }
+        unsafe {
+            let mut func = compare_func;
+            let func_obj: &mut (dyn FnMut(&Value, &Value) -> Ordering) = &mut func;
+            let func_ptr =
+                &func_obj as *const &mut (dyn FnMut(&Value, &Value) -> Ordering) as ffi::gpointer;
+
+            gobject_ffi::g_value_array_sort_with_data(
+                self.to_glib_none_mut().0,
+                Some(compare_func_trampoline),
+                func_ptr,
+            );
+        }
+    }
+}
+
+impl ops::Deref for ValueArray {
+    type Target = [Value];
+
+    #[inline]
+    fn deref(&self) -> &[Value] {
+        if self.is_empty() {
+            return &[];
+        }
+
+        unsafe {
+            slice::from_raw_parts(
+                (*self.as_ptr()).values as *const Value,
+                (*self.as_ptr()).n_values as usize,
+            )
+        }
+    }
+}
+
+impl ops::DerefMut for ValueArray {
+    #[inline]
+    fn deref_mut(&mut self) -> &mut [Value] {
+        if self.is_empty() {
+            return &mut [];
+        }
+
+        unsafe {
+            slice::from_raw_parts_mut(
+                (*self.as_ptr()).values as *mut Value,
+                (*self.as_ptr()).n_values as usize,
+            )
+        }
+    }
+}
+
+// Implementing `Value` traits manually because of a custom ParamSpec
+impl StaticType for ValueArray {
+    #[inline]
+    fn static_type() -> Type {
+        unsafe { from_glib(gobject_ffi::g_value_array_get_type()) }
+    }
+}
+
+#[doc(hidden)]
+impl ValueType for ValueArray {
+    type Type = Self;
+}
+
+#[doc(hidden)]
+impl ValueTypeOptional for ValueArray {}
+
+#[doc(hidden)]
+unsafe impl<'a> FromValue<'a> for ValueArray {
+    type Checker = GenericValueTypeOrNoneChecker<Self>;
+
+    #[inline]
+    unsafe fn from_value(value: &'a Value) -> Self {
+        let ptr = gobject_ffi::g_value_dup_boxed(value.to_glib_none().0);
+        debug_assert!(!ptr.is_null());
+        from_glib_full(ptr as *mut gobject_ffi::GValueArray)
+    }
+}
+
+#[doc(hidden)]
+unsafe impl<'a> FromValue<'a> for &'a ValueArray {
+    type Checker = GenericValueTypeOrNoneChecker<Self>;
+
+    #[inline]
+    unsafe fn from_value(value: &'a Value) -> Self {
+        debug_assert_eq!(
+            std::mem::size_of::<Self>(),
+            std::mem::size_of::<ffi::gpointer>()
+        );
+        let value = &*(value as *const Value as *const gobject_ffi::GValue);
+        debug_assert!(!value.data[0].v_pointer.is_null());
+        <ValueArray>::from_glib_ptr_borrow(
+            &value.data[0].v_pointer as *const ffi::gpointer
+                as *const *const gobject_ffi::GValueArray,
+        )
+    }
+}
+
+#[doc(hidden)]
+impl ToValue for ValueArray {
+    #[inline]
+    fn to_value(&self) -> Value {
+        unsafe {
+            let mut value = Value::from_type_unchecked(<Self as StaticType>::static_type());
+            gobject_ffi::g_value_take_boxed(
+                value.to_glib_none_mut().0,
+                ToGlibPtr::<*mut gobject_ffi::GValueArray>::to_glib_full(self) as *mut _,
+            );
+            value
+        }
+    }
+
+    #[inline]
+    fn value_type(&self) -> Type {
+        <Self as StaticType>::static_type()
+    }
+}
+
+impl std::convert::From<ValueArray> for Value {
+    #[inline]
+    fn from(o: ValueArray) -> Self {
+        unsafe {
+            let mut value = Value::from_type_unchecked(<ValueArray as StaticType>::static_type());
+            gobject_ffi::g_value_take_boxed(
+                value.to_glib_none_mut().0,
+                IntoGlibPtr::<*mut gobject_ffi::GValueArray>::into_glib_ptr(o) as *mut _,
+            );
+            value
+        }
+    }
+}
+
+#[doc(hidden)]
+impl ToValueOptional for ValueArray {
+    #[inline]
+    fn to_value_optional(s: Option<&Self>) -> Value {
+        let mut value = Value::for_value_type::<Self>();
+        unsafe {
+            gobject_ffi::g_value_take_boxed(
+                value.to_glib_none_mut().0,
+                ToGlibPtr::<*mut gobject_ffi::GValueArray>::to_glib_full(&s) as *mut _,
+            );
+        }
+
+        value
+    }
+}
+
+impl HasParamSpec for ValueArray {
+    type ParamSpec = ParamSpecValueArray;
+    type SetValue = Self;
+    type BuilderFn = fn(&str) -> ParamSpecValueArrayBuilder;
+
+    fn param_spec_builder() -> Self::BuilderFn {
+        Self::ParamSpec::builder
+    }
+}