1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167

// Take a look at the license at the top of the repository in the LICENSE file.

use crate::ffi;
use crate::Drop;
use glib::object::IsA;
use glib::translate::*;
use glib::GString;
use std::future;
use std::pin::Pin;
use std::ptr;

impl Drop {
    /// Asynchronously read the dropped data from a [`Drop`][crate::Drop]
    /// in a format that complies with one of the mime types.
    /// ## `mime_types`
    ///
    ///  pointer to an array of mime types
    /// ## `io_priority`
    /// the I/O priority for the read operation
    /// ## `cancellable`
    /// optional `GCancellable` object
    /// ## `callback`
    /// a `GAsyncReadyCallback` to call when
    ///  the request is satisfied
    #[doc(alias = "gdk_drop_read_async")]
    pub fn read_async<
        P: IsA<gio::Cancellable>,
        Q: FnOnce(Result<(gio::InputStream, GString), glib::Error>) + 'static,
    >(
        &self,
        mime_types: &[&str],
        io_priority: glib::Priority,
        cancellable: Option<&P>,
        callback: Q,
    ) {
        let user_data: Box<Q> = Box::new(callback);
        unsafe extern "C" fn read_async_trampoline<
            Q: FnOnce(Result<(gio::InputStream, GString), glib::Error>) + 'static,
        >(
            _source_object: *mut glib::gobject_ffi::GObject,
            res: *mut gio::ffi::GAsyncResult,
            user_data: glib::ffi::gpointer,
        ) {
            let mut error = ptr::null_mut();
            let mut out_mime_type = ptr::null();
            let ret = ffi::gdk_drop_read_finish(
                _source_object as *mut _,
                res,
                &mut out_mime_type,
                &mut error,
            );
            let result = if error.is_null() {
                Ok((from_glib_full(ret), from_glib_none(out_mime_type)))
            } else {
                Err(from_glib_full(error))
            };
            let callback: Box<Q> = Box::from_raw(user_data as *mut _);
            callback(result);
        }
        let callback = read_async_trampoline::<Q>;
        unsafe {
            ffi::gdk_drop_read_async(
                self.to_glib_none().0,
                mime_types.to_glib_none().0,
                io_priority.into_glib(),
                cancellable.map(|p| p.as_ref()).to_glib_none().0,
                Some(callback),
                Box::into_raw(user_data) as *mut _,
            );
        }
    }

    pub fn read_async_future(
        &self,
        mime_types: &[&str],
        io_priority: glib::Priority,
    ) -> Pin<
        Box<
            dyn future::Future<Output = Result<(gio::InputStream, GString), glib::Error>> + 'static,
        >,
    > {
        let mime_types = mime_types
            .iter()
            .copied()
            .map(String::from)
            .collect::<Vec<_>>();
        Box::pin(gio::GioFuture::new(self, move |obj, cancellable, send| {
            let mime_types = mime_types.iter().map(|s| s.as_str()).collect::<Vec<_>>();
            obj.read_async(&mime_types, io_priority, Some(cancellable), move |res| {
                send.resolve(res);
            });
        }))
    }

    /// Asynchronously request the drag operation's contents converted
    /// to the given `type_`.
    ///
    /// When the operation is finished `callback` will be called. You must
    /// then call `Gdk::`Drop::read_value_finish()`` to get the resulting
    /// `GValue`.
    ///
    /// For local drag-and-drop operations that are available in the given
    /// `GType`, the value will be copied directly. Otherwise, GDK will
    /// try to use [``content_deserialize_async()``][`crate::content_deserialize_async()`] to convert the data.
    /// ## `type_`
    /// a `GType` to read
    /// ## `io_priority`
    /// the I/O priority of the request.
    /// ## `cancellable`
    /// optional `GCancellable` object, [`None`] to ignore.
    /// ## `callback`
    /// callback to call when the request is satisfied
    #[doc(alias = "gdk_drop_read_value_async")]
    pub fn read_value_async<
        P: IsA<gio::Cancellable>,
        Q: FnOnce(Result<glib::Value, glib::Error>) + 'static,
    >(
        &self,
        type_: glib::types::Type,
        io_priority: glib::Priority,
        cancellable: Option<&P>,
        callback: Q,
    ) {
        let user_data: Box<Q> = Box::new(callback);
        unsafe extern "C" fn read_value_async_trampoline<
            Q: FnOnce(Result<glib::Value, glib::Error>) + 'static,
        >(
            _source_object: *mut glib::gobject_ffi::GObject,
            res: *mut gio::ffi::GAsyncResult,
            user_data: glib::ffi::gpointer,
        ) {
            let mut error = ptr::null_mut();
            let ret = ffi::gdk_drop_read_value_finish(_source_object as *mut _, res, &mut error);
            let result = if error.is_null() {
                Ok(from_glib_none(ret))
            } else {
                Err(from_glib_full(error))
            };
            let callback: Box<Q> = Box::from_raw(user_data as *mut _);
            callback(result);
        }
        let callback = read_value_async_trampoline::<Q>;
        unsafe {
            ffi::gdk_drop_read_value_async(
                self.to_glib_none().0,
                type_.into_glib(),
                io_priority.into_glib(),
                cancellable.map(|p| p.as_ref()).to_glib_none().0,
                Some(callback),
                Box::into_raw(user_data) as *mut _,
            );
        }
    }

    pub fn read_value_async_future(
        &self,
        type_: glib::types::Type,
        io_priority: glib::Priority,
    ) -> Pin<Box<dyn std::future::Future<Output = Result<glib::Value, glib::Error>> + 'static>>
    {
        Box::pin(gio::GioFuture::new(self, move |obj, cancellable, send| {
            obj.read_value_async(type_, io_priority, Some(cancellable), move |res| {
                send.resolve(res);
            });
        }))
    }
}