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// 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::{OutputStream, PollableOutputStream, Seekable};
use glib::{
    prelude::*,
    signal::{connect_raw, SignalHandlerId},
    translate::*,
};
use std::{boxed::Box as Box_, fmt, mem::transmute};

glib::wrapper! {
    /// [`MemoryOutputStream`][crate::MemoryOutputStream] is a class for using arbitrary
    /// memory chunks as output for GIO streaming output operations.
    ///
    /// As of GLib 2.34, [`MemoryOutputStream`][crate::MemoryOutputStream] trivially implements
    /// [`PollableOutputStream`][crate::PollableOutputStream]: it always polls as ready.
    ///
    /// ## Properties
    ///
    ///
    /// #### `data`
    ///  Pointer to buffer where data will be written.
    ///
    /// Readable | Writeable | Construct Only
    ///
    ///
    /// #### `data-size`
    ///  Size of data written to the buffer.
    ///
    /// Readable
    ///
    ///
    /// #### `destroy-function`
    ///  Function called with the buffer as argument when the stream is destroyed.
    ///
    /// Readable | Writeable | Construct Only
    ///
    ///
    /// #### `realloc-function`
    ///  Function with realloc semantics called to enlarge the buffer.
    ///
    /// Readable | Writeable | Construct Only
    ///
    ///
    /// #### `size`
    ///  Current size of the data buffer.
    ///
    /// Readable | Writeable | Construct Only
    ///
    /// # Implements
    ///
    /// [`MemoryOutputStreamExt`][trait@crate::prelude::MemoryOutputStreamExt], [`OutputStreamExt`][trait@crate::prelude::OutputStreamExt], [`trait@glib::ObjectExt`], [`PollableOutputStreamExt`][trait@crate::prelude::PollableOutputStreamExt], [`SeekableExt`][trait@crate::prelude::SeekableExt], [`OutputStreamExtManual`][trait@crate::prelude::OutputStreamExtManual], [`PollableOutputStreamExtManual`][trait@crate::prelude::PollableOutputStreamExtManual]
    #[doc(alias = "GMemoryOutputStream")]
    pub struct MemoryOutputStream(Object<ffi::GMemoryOutputStream, ffi::GMemoryOutputStreamClass>) @extends OutputStream, @implements PollableOutputStream, Seekable;

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

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

    /// Creates a new [`MemoryOutputStream`][crate::MemoryOutputStream], using `g_realloc()` and `g_free()`
    /// for memory allocation.
    #[doc(alias = "g_memory_output_stream_new_resizable")]
    pub fn new_resizable() -> MemoryOutputStream {
        unsafe {
            OutputStream::from_glib_full(ffi::g_memory_output_stream_new_resizable()).unsafe_cast()
        }
    }
}

/// Trait containing all [`struct@MemoryOutputStream`] methods.
///
/// # Implementors
///
/// [`MemoryOutputStream`][struct@crate::MemoryOutputStream]
pub trait MemoryOutputStreamExt: 'static {
    /// Returns the number of bytes from the start up to including the last
    /// byte written in the stream that has not been truncated away.
    ///
    /// # Returns
    ///
    /// the number of bytes written to the stream
    #[doc(alias = "g_memory_output_stream_get_data_size")]
    #[doc(alias = "get_data_size")]
    fn data_size(&self) -> usize;

    /// Returns data from the `self` as a [`glib::Bytes`][crate::glib::Bytes]. `self` must be
    /// closed before calling this function.
    ///
    /// # Returns
    ///
    /// the stream's data
    #[doc(alias = "g_memory_output_stream_steal_as_bytes")]
    fn steal_as_bytes(&self) -> glib::Bytes;

    #[doc(alias = "data-size")]
    fn connect_data_size_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
}

impl<O: IsA<MemoryOutputStream>> MemoryOutputStreamExt for O {
    fn data_size(&self) -> usize {
        unsafe { ffi::g_memory_output_stream_get_data_size(self.as_ref().to_glib_none().0) }
    }

    fn steal_as_bytes(&self) -> glib::Bytes {
        unsafe {
            from_glib_full(ffi::g_memory_output_stream_steal_as_bytes(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    fn connect_data_size_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_data_size_trampoline<
            P: IsA<MemoryOutputStream>,
            F: Fn(&P) + 'static,
        >(
            this: *mut ffi::GMemoryOutputStream,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(MemoryOutputStream::from_glib_borrow(this).unsafe_cast_ref())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"notify::data-size\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    notify_data_size_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }
}

impl fmt::Display for MemoryOutputStream {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        f.write_str("MemoryOutputStream")
    }
}