Merge pull request #62 from gtk-rs/bilelmoussaoui/subclassing-4

Subclassing round 4

gtk4/src/subclass/filter.rs

@@ -0,0 +1,78 @@
+use crate::{Filter, FilterMatch};
+use glib::subclass::object::ObjectImpl;
+use glib::subclass::prelude::*;
+use glib::translate::*;
+use glib::{Cast, Object};
+
+pub trait FilterImpl: FilterImplExt + ObjectImpl {
+ fn get_strictness(&self, filter: &Self::Type) -> FilterMatch {
+ self.parent_get_strictness(filter)
+ }
+ fn match_(&self, filter: &Self::Type, item: &Object) -> bool {
+ self.parent_match_(filter, item)
+ }
+}
+
+pub trait FilterImplExt: ObjectSubclass {
+ fn parent_get_strictness(&self, filter: &Self::Type) -> FilterMatch;
+ fn parent_match_(&self, filter: &Self::Type, item: &Object) -> bool;
+}
+
+impl<T: FilterImpl> FilterImplExt for T {
+ fn parent_get_strictness(&self, filter: &Self::Type) -> FilterMatch {
+ unsafe {
+ let data = T::type_data();
+ let parent_class = data.as_ref().get_parent_class() as *mut ffi::GtkFilterClass;
+ let f = (*parent_class)
+ .get_strictness
+ .expect("No parent class impl for \"get_strictness\"");
+ from_glib(f(filter.unsafe_cast_ref::<Filter>().to_glib_none().0))
+ }
+ }
+
+ fn parent_match_(&self, filter: &Self::Type, item: &Object) -> bool {
+ unsafe {
+ let data = T::type_data();
+ let parent_class = data.as_ref().get_parent_class() as *mut ffi::GtkFilterClass;
+ let f = (*parent_class)
+ .match_
+ .expect("No parent class impl for \"match\"");
+ from_glib(f(
+ filter.unsafe_cast_ref::<Filter>().to_glib_none().0,
+ item.to_glib_none().0,
+ ))
+ }
+ }
+}
+
+unsafe impl<T: FilterImpl> IsSubclassable<T> for Filter {
+ fn override_vfuncs(class: &mut glib::Class<Self>) {
+ <Object as IsSubclassable<T>>::override_vfuncs(class);
+
+ let klass = class.as_mut();
+ klass.match_ = Some(filter_match::<T>);
+ klass.get_strictness = Some(filter_get_strictness::<T>);
+ }
+}
+
+unsafe extern "C" fn filter_get_strictness<T: FilterImpl>(
+ ptr: *mut ffi::GtkFilter,
+) -> ffi::GtkFilterMatch {
+ let instance = &*(ptr as *mut T::Instance);
+ let imp = instance.get_impl();
+ let wrap: Borrowed<Filter> = from_glib_borrow(ptr);
+
+ imp.get_strictness(wrap.unsafe_cast_ref()).to_glib()
+}
+
+unsafe extern "C" fn filter_match<T: FilterImpl>(
+ ptr: *mut ffi::GtkFilter,
+ itemptr: *mut glib::gobject_ffi::GObject,
+) -> glib::ffi::gboolean {
+ let instance = &*(ptr as *mut T::Instance);
+ let imp = instance.get_impl();
+ let wrap: Borrowed<Filter> = from_glib_borrow(ptr);
+
+ imp.match_(wrap.unsafe_cast_ref(), &from_glib_borrow(itemptr))
+ .to_glib()
+}