gdk4/auto/

content_provider.rs

// This file was generated by gir (https://github.com/gtk-rs/gir)
// from gir-files (https://github.com/gtk-rs/gir-files)
// DO NOT EDIT

use crate::{ContentFormats, ffi};
use glib::{
    object::ObjectType as _,
    prelude::*,
    signal::{SignalHandlerId, connect_raw},
    translate::*,
};
use std::{boxed::Box as Box_, pin::Pin};

glib::wrapper! {
    /// Provides content for the clipboard or for drag-and-drop operations
    /// in a number of formats.
    ///
    /// To create a [`ContentProvider`][crate::ContentProvider], use [`for_value()`][Self::for_value()]
    /// or [`for_bytes()`][Self::for_bytes()].
    ///
    /// GDK knows how to handle common text and image formats out-of-the-box. See
    /// [`ContentSerializer`][crate::ContentSerializer] and [`ContentDeserializer`][crate::ContentDeserializer] if you want
    /// to add support for application-specific data formats.
    ///
    /// ## Properties
    ///
    ///
    /// #### `formats`
    ///  The possible formats that the provider can provide its data in.
    ///
    /// Readable
    ///
    ///
    /// #### `storable-formats`
    ///  The subset of formats that clipboard managers should store this provider's data in.
    ///
    /// Readable
    ///
    /// ## Signals
    ///
    ///
    /// #### `content-changed`
    ///  Emitted whenever the content provided by this provider has changed.
    ///
    ///
    ///
    /// # Implements
    ///
    /// [`ContentProviderExt`][trait@crate::prelude::ContentProviderExt], [`ContentProviderExtManual`][trait@crate::prelude::ContentProviderExtManual]
    #[doc(alias = "GdkContentProvider")]
    pub struct ContentProvider(Object<ffi::GdkContentProvider, ffi::GdkContentProviderClass>);

    match fn {
        type_ => || ffi::gdk_content_provider_get_type(),
    }
}

impl ContentProvider {
    pub const NONE: Option<&'static ContentProvider> = None;

    /// Create a content provider that provides the given @bytes as data for
    /// the given @mime_type.
    /// ## `mime_type`
    /// the mime type
    /// ## `bytes`
    /// a `GBytes` with the data for @mime_type
    ///
    /// # Returns
    ///
    /// a new [`ContentProvider`][crate::ContentProvider]
    #[doc(alias = "gdk_content_provider_new_for_bytes")]
    #[doc(alias = "new_for_bytes")]
    pub fn for_bytes(mime_type: &str, bytes: &glib::Bytes) -> ContentProvider {
        assert_initialized_main_thread!();
        unsafe {
            from_glib_full(ffi::gdk_content_provider_new_for_bytes(
                mime_type.to_glib_none().0,
                bytes.to_glib_none().0,
            ))
        }
    }

    /// Create a content provider that provides the given @value.
    /// ## `value`
    /// a `GValue`
    ///
    /// # Returns
    ///
    /// a new [`ContentProvider`][crate::ContentProvider]
    #[doc(alias = "gdk_content_provider_new_for_value")]
    #[doc(alias = "new_for_value")]
    pub fn for_value(value: &glib::Value) -> ContentProvider {
        assert_initialized_main_thread!();
        unsafe {
            from_glib_full(ffi::gdk_content_provider_new_for_value(
                value.to_glib_none().0,
            ))
        }
    }

    /// Creates a content provider that represents all the given @providers.
    ///
    /// Whenever data needs to be written, the union provider will try the given
    /// @providers in the given order and the first one supporting a format will
    /// be chosen to provide it.
    ///
    /// This allows an easy way to support providing data in different formats.
    /// For example, an image may be provided by its file and by the image
    /// contents with a call such as
    /// **⚠️ The following code is in c ⚠️**
    ///
    /// ```c
    /// gdk_content_provider_new_union ((GdkContentProvider *[2]) {
    ///                                   gdk_content_provider_new_typed (G_TYPE_FILE, file),
    ///                                   gdk_content_provider_new_typed (GDK_TYPE_TEXTURE, texture)
    ///                                 }, 2);
    /// ```
    /// ## `providers`
    ///
    ///   The [`ContentProvider`][crate::ContentProvider]s to present the union of
    ///
    /// # Returns
    ///
    /// a new [`ContentProvider`][crate::ContentProvider]
    #[doc(alias = "gdk_content_provider_new_union")]
    pub fn new_union(providers: &[ContentProvider]) -> ContentProvider {
        assert_initialized_main_thread!();
        let n_providers = providers.len() as _;
        unsafe {
            from_glib_full(ffi::gdk_content_provider_new_union(
                providers.to_glib_full(),
                n_providers,
            ))
        }
    }
}

/// Trait containing all [`struct@ContentProvider`] methods.
///
/// # Implementors
///
/// [`ContentProvider`][struct@crate::ContentProvider]
pub trait ContentProviderExt: IsA<ContentProvider> + 'static {
    /// Emits the ::content-changed signal.
    #[doc(alias = "gdk_content_provider_content_changed")]
    fn content_changed(&self) {
        unsafe {
            ffi::gdk_content_provider_content_changed(self.as_ref().to_glib_none().0);
        }
    }

    /// Gets the formats that the provider can provide its current contents in.
    ///
    /// # Returns
    ///
    /// The formats of the provider
    #[doc(alias = "gdk_content_provider_ref_formats")]
    #[doc(alias = "ref_formats")]
    fn formats(&self) -> ContentFormats {
        unsafe {
            from_glib_full(ffi::gdk_content_provider_ref_formats(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    /// Gets the formats that the provider suggests other applications to store
    /// the data in.
    ///
    /// An example of such an application would be a clipboard manager.
    ///
    /// This can be assumed to be a subset of [`formats()`][Self::formats()].
    ///
    /// # Returns
    ///
    /// The storable formats of the provider
    #[doc(alias = "gdk_content_provider_ref_storable_formats")]
    #[doc(alias = "ref_storable_formats")]
    #[doc(alias = "storable-formats")]
    fn storable_formats(&self) -> ContentFormats {
        unsafe {
            from_glib_full(ffi::gdk_content_provider_ref_storable_formats(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    /// Asynchronously writes the contents of @self to @stream in the given
    /// @mime_type.
    ///
    /// The given mime type does not need to be listed in the formats returned by
    /// [`formats()`][Self::formats()]. However, if the given `GType` is
    /// not supported, `G_IO_ERROR_NOT_SUPPORTED` will be reported.
    ///
    /// The given @stream will not be closed.
    /// ## `mime_type`
    /// the mime type to provide the data in
    /// ## `stream`
    /// the `GOutputStream` to write to
    /// ## `io_priority`
    /// 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_content_provider_write_mime_type_async")]
    fn write_mime_type_async<P: FnOnce(Result<(), glib::Error>) + 'static>(
        &self,
        mime_type: &str,
        stream: &impl IsA<gio::OutputStream>,
        io_priority: glib::Priority,
        cancellable: Option<&impl IsA<gio::Cancellable>>,
        callback: P,
    ) {
        let main_context = glib::MainContext::ref_thread_default();
        let is_main_context_owner = main_context.is_owner();
        let has_acquired_main_context = (!is_main_context_owner)
            .then(|| main_context.acquire().ok())
            .flatten();
        assert!(
            is_main_context_owner || has_acquired_main_context.is_some(),
            "Async operations only allowed if the thread is owning the MainContext"
        );

        let user_data: Box_<glib::thread_guard::ThreadGuard<P>> =
            Box_::new(glib::thread_guard::ThreadGuard::new(callback));
        unsafe extern "C" fn write_mime_type_async_trampoline<
            P: FnOnce(Result<(), glib::Error>) + 'static,
        >(
            _source_object: *mut glib::gobject_ffi::GObject,
            res: *mut gio::ffi::GAsyncResult,
            user_data: glib::ffi::gpointer,
        ) {
            unsafe {
                let mut error = std::ptr::null_mut();
                ffi::gdk_content_provider_write_mime_type_finish(
                    _source_object as *mut _,
                    res,
                    &mut error,
                );
                let result = if error.is_null() {
                    Ok(())
                } else {
                    Err(from_glib_full(error))
                };
                let callback: Box_<glib::thread_guard::ThreadGuard<P>> =
                    Box_::from_raw(user_data as *mut _);
                let callback: P = callback.into_inner();
                callback(result);
            }
        }
        let callback = write_mime_type_async_trampoline::<P>;
        unsafe {
            ffi::gdk_content_provider_write_mime_type_async(
                self.as_ref().to_glib_none().0,
                mime_type.to_glib_none().0,
                stream.as_ref().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 _,
            );
        }
    }

    fn write_mime_type_future(
        &self,
        mime_type: &str,
        stream: &(impl IsA<gio::OutputStream> + Clone + 'static),
        io_priority: glib::Priority,
    ) -> Pin<Box_<dyn std::future::Future<Output = Result<(), glib::Error>> + 'static>> {
        let mime_type = String::from(mime_type);
        let stream = stream.clone();
        Box_::pin(gio::GioFuture::new(self, move |obj, cancellable, send| {
            obj.write_mime_type_async(
                &mime_type,
                &stream,
                io_priority,
                Some(cancellable),
                move |res| {
                    send.resolve(res);
                },
            );
        }))
    }

    /// Emitted whenever the content provided by this provider has changed.
    #[doc(alias = "content-changed")]
    fn connect_content_changed<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn content_changed_trampoline<
            P: IsA<ContentProvider>,
            F: Fn(&P) + 'static,
        >(
            this: *mut ffi::GdkContentProvider,
            f: glib::ffi::gpointer,
        ) {
            unsafe {
                let f: &F = &*(f as *const F);
                f(ContentProvider::from_glib_borrow(this).unsafe_cast_ref())
            }
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                c"content-changed".as_ptr() as *const _,
                Some(std::mem::transmute::<*const (), unsafe extern "C" fn()>(
                    content_changed_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[doc(alias = "formats")]
    fn connect_formats_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_formats_trampoline<
            P: IsA<ContentProvider>,
            F: Fn(&P) + 'static,
        >(
            this: *mut ffi::GdkContentProvider,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            unsafe {
                let f: &F = &*(f as *const F);
                f(ContentProvider::from_glib_borrow(this).unsafe_cast_ref())
            }
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                c"notify::formats".as_ptr() as *const _,
                Some(std::mem::transmute::<*const (), unsafe extern "C" fn()>(
                    notify_formats_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[doc(alias = "storable-formats")]
    fn connect_storable_formats_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_storable_formats_trampoline<
            P: IsA<ContentProvider>,
            F: Fn(&P) + 'static,
        >(
            this: *mut ffi::GdkContentProvider,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            unsafe {
                let f: &F = &*(f as *const F);
                f(ContentProvider::from_glib_borrow(this).unsafe_cast_ref())
            }
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                c"notify::storable-formats".as_ptr() as *const _,
                Some(std::mem::transmute::<*const (), unsafe extern "C" fn()>(
                    notify_storable_formats_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }
}

impl<O: IsA<ContentProvider>> ContentProviderExt for O {}