gio: Add Icon subclassing support

Author: bilelmoussaoui

gio/src/subclass/icon.rs

@@ -0,0 +1,174 @@
+// Take a look at the license at the top of the repository in the LICENSE file.
+
+use std::{
+    collections::hash_map::DefaultHasher,
+    hash::{Hash, Hasher},
+};
+
+use glib::{prelude::*, subclass::prelude::*, translate::*, Error};
+
+use crate::Icon;
+
+pub trait IconImpl: ObjectImpl + Hash + PartialEq {
+    fn serialize(&self) -> Option<glib::Variant> {
+        self.parent_serialize()
+    }
+
+    fn to_tokens(&self) -> Option<(Vec<String>, i32)> {
+        self.parent_to_tokens()
+    }
+
+    fn from_tokens(tokens: &[String], version: i32) -> Result<Icon, Error> {
+        Self::parent_from_tokens(tokens, version)
+    }
+}
+
+pub trait IconImplExt: ObjectSubclass {
+    fn parent_serialize(&self) -> Option<glib::Variant>;
+    fn parent_to_tokens(&self) -> Option<(Vec<String>, i32)>;
+    fn parent_from_tokens(tokens: &[String], version: i32) -> Result<Icon, Error>;
+}
+
+impl<T: IconImpl> IconImplExt for T {
+    fn parent_serialize(&self) -> Option<glib::Variant> {
+        unsafe {
+            let type_data = Self::type_data();
+            let parent_iface =
+                type_data.as_ref().parent_interface::<Icon>() as *const ffi::GIconIface;
+
+            let func = (*parent_iface)
+                .serialize
+                .expect("No parent iface implementation for \"serialize\"");
+            from_glib_full(func(self.obj().unsafe_cast_ref::<Icon>().to_glib_none().0))
+        }
+    }
+
+    fn parent_to_tokens(&self) -> Option<(Vec<String>, i32)> {
+        unsafe {
+            let type_data = Self::type_data();
+            let parent_iface =
+                type_data.as_ref().parent_interface::<Icon>() as *const ffi::GIconIface;
+
+            let tokens = std::ptr::null_mut();
+            let mut version = std::mem::MaybeUninit::uninit();
+            let func = (*parent_iface)
+                .to_tokens
+                .expect("No parent iface implementation for \"to_tokens\"");
+            let result = from_glib(func(
+                self.obj().unsafe_cast_ref::<Icon>().to_glib_none().0,
+                tokens,
+                version.as_mut_ptr(),
+            ));
+            if result {
+                Some((
+                    FromGlibPtrArrayContainerAsVec::from_glib_full_as_vec(tokens),
+                    version.assume_init(),
+                ))
+            } else {
+                None
+            }
+        }
+    }
+
+    fn parent_from_tokens(tokens: &[String], version: i32) -> Result<Icon, Error> {
+        unsafe {
+            let type_data = Self::type_data();
+            let parent_iface =
+                type_data.as_ref().parent_interface::<Icon>() as *const ffi::GIconIface;
+
+            let func = (*parent_iface)
+                .from_tokens
+                .expect("No parent iface implementation for \"from_tokens\"");
+            let mut err = std::ptr::null_mut();
+
+            let icon = func(
+                tokens.as_ptr() as *mut _,
+                tokens.len() as _,
+                version,
+                &mut err,
+            );
+            if err.is_null() {
+                Ok(Icon::from_glib_full(icon))
+            } else {
+                Err(from_glib_full(err))
+            }
+        }
+    }
+}
+
+unsafe impl<T: IconImpl> IsImplementable<T> for Icon {
+    fn interface_init(iface: &mut glib::Interface<Self>) {
+        let iface = iface.as_mut();
+
+        iface.to_tokens = Some(icon_to_tokens::<T>);
+        iface.from_tokens = Some(icon_from_tokens::<T>);
+        iface.serialize = Some(icon_serialize::<T>);
+        iface.equal = Some(icon_equal::<T>);
+        iface.hash = Some(icon_hash::<T>);
+    }
+}
+
+unsafe extern "C" fn icon_hash<T: IconImpl>(icon: *mut ffi::GIcon) -> u32 {
+    let instance = &*(icon as *mut T::Instance);
+    let imp = instance.imp();
+    let mut hasher = DefaultHasher::new();
+    imp.hash(&mut hasher);
+    hasher.finish() as _
+}
+
+unsafe extern "C" fn icon_equal<T: IconImpl>(
+    icon1: *mut ffi::GIcon,
+    icon2: *mut ffi::GIcon,
+) -> glib::ffi::gboolean {
+    let instance = &*(icon1 as *mut T::Instance);
+    let imp1 = instance.imp();
+    let instance = &*(icon2 as *mut T::Instance);
+    let imp2 = instance.imp();
+
+    imp1.eq(imp2).into_glib()
+}
+
+unsafe extern "C" fn icon_serialize<T: IconImpl>(
+    icon: *mut ffi::GIcon,
+) -> *mut glib::ffi::GVariant {
+    let instance = &*(icon as *mut T::Instance);
+    let imp = instance.imp();
+
+    imp.serialize().to_glib_full()
+}
+
+unsafe extern "C" fn icon_to_tokens<T: IconImpl>(
+    icon: *mut ffi::GIcon,
+    tokens_ptr: *mut glib::ffi::GPtrArray,
+    version_ptr: *mut libc::c_int,
+) -> glib::ffi::gboolean {
+    let instance = &*(icon as *mut T::Instance);
+    let imp = instance.imp();
+
+    if let Some((tokens, version)) = imp.to_tokens() {
+        *version_ptr = version;
+        *tokens_ptr =
+            *ToGlibContainerFromSlice::<*mut glib::ffi::GPtrArray>::to_glib_full_from_slice(
+                &tokens,
+            );
+        true.into_glib()
+    } else {
+        false.into_glib()
+    }
+}
+
+unsafe extern "C" fn icon_from_tokens<T: IconImpl>(
+    tokens_ptr: *mut *mut libc::c_char,
+    n_tokens: i32,
+    version: i32,
+    err_ptr: *mut *mut glib::ffi::GError,
+) -> *mut ffi::GIcon {
+    let tokens = String::from_glib_none_num_as_vec(tokens_ptr, n_tokens as _);
+    match T::from_tokens(tokens.as_slice(), version) {
+        Ok(icon) => icon.to_glib_full(),
+        Err(err) => {
+            *err_ptr = err.into_glib_ptr();
+            std::ptr::null_mut()
+        }
+    }
+}

gio/src/subclass/mod.rs

@@ -6,6 +6,7 @@ mod app_launch_context;
 mod application;
 mod async_initable;
 mod file_monitor;
+mod icon;
 mod initable;
 mod input_stream;
 mod io_stream;
@@ -26,6 +27,7 @@ pub mod prelude {
         application::{ApplicationImpl, ApplicationImplExt},
         async_initable::{AsyncInitableImpl, AsyncInitableImplExt},
         file_monitor::{FileMonitorImpl, FileMonitorImplExt},
+        icon::{IconImpl, IconImplExt},
         initable::{InitableImpl, InitableImplExt},
         input_stream::{InputStreamImpl, InputStreamImplExt},
         io_stream::{IOStreamImpl, IOStreamImplExt},