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use libc::c_void;
use std::mem;
use std::ops::Index;
use std::iter::{FromIterator, IntoIterator};
use std::marker::PhantomData;
use ffi;
use glib_container::GlibContainer;
pub struct List<T> {
pointer: *mut ffi::GList,
_marker: PhantomData<T>
}
pub struct Elem<'a, T: 'a> {
pointer: *mut ffi::GList,
_marker: PhantomData<&'a T>
}
pub struct RevElem<'a, T: 'a> {
pointer: *mut ffi::GList,
_marker: PhantomData<&'a T>
}
impl<T> List<T> {
pub fn new() -> List<T> {
List {
pointer: ::std::ptr::null_mut(),
_marker: PhantomData
}
}
pub fn from_vec(values: Vec<T>) -> List<T> {
FromIterator::from_iter(values.into_iter())
}
pub fn from_slice(values: &[T]) -> List<T> where T: Clone {
let v: Vec<T> = values.iter().map(|x| (*x).clone()).collect();
FromIterator::from_iter(v.into_iter())
}
pub fn append(&mut self, data: T) {
unsafe {
self.pointer = ffi::g_list_append(self.pointer, mem::transmute(Box::new(data)));
}
}
pub fn prepend(&mut self, data: T) {
unsafe {
self.pointer = ffi::g_list_prepend(self.pointer, mem::transmute(Box::new(data)));
}
}
pub fn nth(&self, n: u32) -> &T {
unsafe {
mem::transmute::<*mut c_void, &T>(ffi::g_list_nth_data(self.pointer, n))
}
}
pub fn last(&self) -> &T {
let elem = unsafe { ffi::g_list_last(self.pointer) };
unsafe { mem::transmute::<*mut c_void, &T>((*elem).data)}
}
pub fn first(&self) -> &T {
let elem = unsafe { ffi::g_list_first(self.pointer) };
unsafe { mem::transmute::<*mut c_void, &T>((*elem).data)}
}
pub fn insert(&mut self, data: T, position: i32) {
unsafe {
self.pointer = ffi::g_list_insert(self.pointer, mem::transmute(Box::new(data)), position);
}
}
pub fn concat(&mut self, list: List<T>) {
unsafe {
ffi::g_list_concat(self.pointer, list.unwrap());
}
}
pub fn reverse(&mut self) {
unsafe {
self.pointer = ffi::g_list_reverse(self.pointer);
}
}
pub fn iter(&self) -> Elem<T> {
Elem {
pointer: unsafe { ffi::g_list_first(self.pointer) },
_marker: PhantomData
}
}
pub fn rev_iter(&self) -> RevElem<T> {
RevElem {
pointer: unsafe { ffi::g_list_last(self.pointer) },
_marker: PhantomData
}
}
pub fn len(&self) -> usize {
unsafe { ffi::g_list_length(self.pointer) as usize }
}
pub fn clear(&mut self) {
unsafe {
ffi::g_list_free(self.pointer)
}
}
pub fn extend<It: IntoIterator<Item=T>>(&mut self, it: It) {
for elem in it {
self.append(elem);
}
}
}
impl<T> Index<usize> for List<T> {
type Output = T;
fn index<'a>(&'a self, _rhs: usize) -> &'a T {
self.nth(_rhs as u32)
}
}
impl<'a, T> Iterator for Elem<'a, T> {
type Item = &'a T;
fn next(&mut self) -> Option<&'a T> {
if self.pointer.is_null() {
None
} else {
let ret = unsafe { mem::transmute::<*mut c_void, &T>((*self.pointer).data)};
unsafe { self.pointer = (*self.pointer).next; }
Some(ret)
}
}
}
impl<'a, T> Iterator for RevElem<'a, T> {
type Item = &'a T;
fn next(&mut self) -> Option<&'a T> {
if self.pointer.is_null() {
None
} else {
let ret = unsafe { mem::transmute::<*mut c_void, &T>((*self.pointer).data)};
unsafe { self.pointer = (*self.pointer).prev; }
Some(ret)
}
}
}
impl<T> FromIterator<T> for List<T> {
fn from_iter<It: IntoIterator<Item=T>>(it: It) -> List<T> {
let mut new_list = List::new();
new_list.extend(it);
new_list
}
}
impl<T> Clone for List<T> {
fn clone(&self) -> List<T> {
unsafe {
GlibContainer::wrap(ffi::g_list_copy(self.pointer))
}
}
}
impl<T> Drop for List<T> {
fn drop(&mut self) {
unsafe { ffi::g_list_free(self.pointer); }
}
}
impl<T> GlibContainer<*mut ffi::GList> for List<T> {
fn wrap(pointer: *mut ffi::GList) -> List<T> {
List {
pointer: pointer,
_marker: PhantomData
}
}
fn unwrap(&self) -> *mut ffi::GList {
self.pointer
}
}