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use Cancellable;
use Error;
use ffi;
use glib;
use glib::object::IsA;
use glib::translate::*;
use std::fmt;
use std::ptr;
glib_wrapper! {
pub struct Seekable(Interface<ffi::GSeekable>);
match fn {
get_type => || ffi::g_seekable_get_type(),
}
}
pub const NONE_SEEKABLE: Option<&Seekable> = None;
pub trait SeekableExt: 'static {
fn can_seek(&self) -> bool;
fn can_truncate(&self) -> bool;
fn seek<'a, P: IsA<Cancellable> + 'a, Q: Into<Option<&'a P>>>(&self, offset: i64, type_: glib::SeekType, cancellable: Q) -> Result<(), Error>;
fn tell(&self) -> i64;
fn truncate<'a, P: IsA<Cancellable> + 'a, Q: Into<Option<&'a P>>>(&self, offset: i64, cancellable: Q) -> Result<(), Error>;
}
impl<O: IsA<Seekable>> SeekableExt for O {
fn can_seek(&self) -> bool {
unsafe {
from_glib(ffi::g_seekable_can_seek(self.as_ref().to_glib_none().0))
}
}
fn can_truncate(&self) -> bool {
unsafe {
from_glib(ffi::g_seekable_can_truncate(self.as_ref().to_glib_none().0))
}
}
fn seek<'a, P: IsA<Cancellable> + 'a, Q: Into<Option<&'a P>>>(&self, offset: i64, type_: glib::SeekType, cancellable: Q) -> Result<(), Error> {
let cancellable = cancellable.into();
unsafe {
let mut error = ptr::null_mut();
let _ = ffi::g_seekable_seek(self.as_ref().to_glib_none().0, offset, type_.to_glib(), cancellable.map(|p| p.as_ref()).to_glib_none().0, &mut error);
if error.is_null() { Ok(()) } else { Err(from_glib_full(error)) }
}
}
fn tell(&self) -> i64 {
unsafe {
ffi::g_seekable_tell(self.as_ref().to_glib_none().0)
}
}
fn truncate<'a, P: IsA<Cancellable> + 'a, Q: Into<Option<&'a P>>>(&self, offset: i64, cancellable: Q) -> Result<(), Error> {
let cancellable = cancellable.into();
unsafe {
let mut error = ptr::null_mut();
let _ = ffi::g_seekable_truncate(self.as_ref().to_glib_none().0, offset, cancellable.map(|p| p.as_ref()).to_glib_none().0, &mut error);
if error.is_null() { Ok(()) } else { Err(from_glib_full(error)) }
}
}
}
impl fmt::Display for Seekable {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "Seekable")
}
}