gtk4/
font_dialog.rs

1// Take a look at the license at the top of the repository in the LICENSE file.
2
3use std::{boxed::Box as Box_, pin::Pin, ptr};
4
5use glib::translate::*;
6
7use crate::{ffi, prelude::*, FontDialog, Window};
8
9impl FontDialog {
10    #[doc(alias = "gtk_font_dialog_choose_font_and_features")]
11    #[doc(alias = "gtk_font_dialog_choose_font_and_features_finish")]
12    pub fn choose_font_and_features<
13        P: FnOnce(
14                Result<
15                    (
16                        Option<pango::FontDescription>,
17                        glib::GString,
18                        pango::Language,
19                    ),
20                    glib::Error,
21                >,
22            ) + 'static,
23    >(
24        &self,
25        parent: Option<&impl IsA<Window>>,
26        initial_value: Option<&pango::FontDescription>,
27        cancellable: Option<&impl IsA<gio::Cancellable>>,
28        callback: P,
29    ) {
30        let main_context = glib::MainContext::ref_thread_default();
31        let is_main_context_owner = main_context.is_owner();
32        let has_acquired_main_context = (!is_main_context_owner)
33            .then(|| main_context.acquire().ok())
34            .flatten();
35        assert!(
36            is_main_context_owner || has_acquired_main_context.is_some(),
37            "Async operations only allowed if the thread is owning the MainContext"
38        );
39
40        let user_data: Box_<glib::thread_guard::ThreadGuard<P>> =
41            Box_::new(glib::thread_guard::ThreadGuard::new(callback));
42        unsafe extern "C" fn choose_font_and_features_trampoline<
43            P: FnOnce(
44                    Result<
45                        (
46                            Option<pango::FontDescription>,
47                            glib::GString,
48                            pango::Language,
49                        ),
50                        glib::Error,
51                    >,
52                ) + 'static,
53        >(
54            _source_object: *mut glib::gobject_ffi::GObject,
55            res: *mut gio::ffi::GAsyncResult,
56            user_data: glib::ffi::gpointer,
57        ) {
58            let mut error = ptr::null_mut();
59            let mut font_desc = ptr::null_mut();
60            let mut font_features = ptr::null_mut();
61            let mut language = ptr::null_mut();
62            let _ = ffi::gtk_font_dialog_choose_font_and_features_finish(
63                _source_object as *mut _,
64                res,
65                &mut font_desc,
66                &mut font_features,
67                &mut language,
68                &mut error,
69            );
70            let result = if error.is_null() {
71                Ok((
72                    from_glib_full(font_desc),
73                    from_glib_full(font_features),
74                    from_glib_full(language),
75                ))
76            } else {
77                Err(from_glib_full(error))
78            };
79            let callback: Box_<glib::thread_guard::ThreadGuard<P>> =
80                Box_::from_raw(user_data as *mut _);
81            let callback: P = callback.into_inner();
82            callback(result);
83        }
84        let callback = choose_font_and_features_trampoline::<P>;
85        unsafe {
86            ffi::gtk_font_dialog_choose_font_and_features(
87                self.to_glib_none().0,
88                parent.map(|p| p.as_ref()).to_glib_none().0,
89                mut_override(initial_value.to_glib_none().0),
90                cancellable.map(|p| p.as_ref()).to_glib_none().0,
91                Some(callback),
92                Box_::into_raw(user_data) as *mut _,
93            );
94        }
95    }
96
97    #[allow(clippy::type_complexity)]
98    pub fn choose_font_and_features_future(
99        &self,
100        parent: Option<&(impl IsA<Window> + Clone + 'static)>,
101        initial_value: Option<&pango::FontDescription>,
102    ) -> Pin<
103        Box_<
104            dyn std::future::Future<
105                    Output = Result<
106                        (
107                            Option<pango::FontDescription>,
108                            glib::GString,
109                            pango::Language,
110                        ),
111                        glib::Error,
112                    >,
113                > + 'static,
114        >,
115    > {
116        let parent = parent.map(ToOwned::to_owned);
117        let initial_value = initial_value.map(ToOwned::to_owned);
118        Box_::pin(gio::GioFuture::new(self, move |obj, cancellable, send| {
119            obj.choose_font_and_features(
120                parent.as_ref().map(::std::borrow::Borrow::borrow),
121                initial_value.as_ref().map(::std::borrow::Borrow::borrow),
122                Some(cancellable),
123                move |res| {
124                    send.resolve(res);
125                },
126            );
127        }))
128    }
129}
gtk4/font_dialog.rs

gtk4/
font_dialog.rs
