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use std::ops::Drop;
use supercow::{Phantomcow, Supercow};
use ffi;
use utils::{StreamingIterator, StreamingIteratorExt};
use Message;
use MessageOwner;
use Tags;
use TagsOwner;
pub trait MessagesOwner {}
#[derive(Debug)]
pub struct MessagesPtr {
pub ptr: *mut ffi::notmuch_messages_t,
}
impl Drop for MessagesPtr {
fn drop(self: &mut Self) {
let valid = unsafe { ffi::notmuch_messages_valid(self.ptr) };
if valid == 0 {
return;
}
unsafe { ffi::notmuch_messages_destroy(self.ptr) };
}
}
#[derive(Debug)]
pub struct Messages<'o, Owner: MessagesOwner + 'o> {
pub(crate) handle: MessagesPtr,
marker: Phantomcow<'o, Owner>,
}
impl<'o, Owner: MessagesOwner + 'o> Messages<'o, Owner> {
pub(crate) fn from_ptr<O: Into<Phantomcow<'o, Owner>>>(
ptr: *mut ffi::notmuch_messages_t,
owner: O,
) -> Messages<'o, Owner> {
Messages {
handle: MessagesPtr { ptr },
marker: owner.into(),
}
}
pub(crate) fn from_handle<O: Into<Phantomcow<'o, Owner>>>(
handle: MessagesPtr,
owner: O,
) -> Messages<'o, Owner> {
Messages {
handle,
marker: owner.into(),
}
}
}
impl<'o, Owner: MessagesOwner + 'o> MessageOwner for Messages<'o, Owner> {}
impl<'o, Owner: MessagesOwner + 'o> TagsOwner for Messages<'o, Owner> {}
impl<'o, Owner: MessagesOwner + 'o> Messages<'o, Owner> {
/**
* Return a list of tags from all messages.
*
* The resulting list is guaranteed not to contain duplicated tags.
*
* WARNING: You can no longer iterate over messages after calling this
* function, because the iterator will point at the end of the list.
* We do not have a function to reset the iterator yet and the only
* way how you can iterate over the list again is to recreate the
* message list.
*
* The function returns NULL on error.
*/
pub fn collect_tags<'m>(self: &'o Self) -> Tags<'m, Self> {
Tags::from_ptr(
unsafe { ffi::notmuch_messages_collect_tags(self.handle.ptr) },
self,
)
}
}
impl<'s, 'o: 's, Owner: MessagesOwner + 'o> StreamingIterator<'s, Message<'s, Self>>
for Messages<'o, Owner>
{
fn next(&'s mut self) -> Option<Message<'s, Self>> {
<Self as StreamingIteratorExt<'s, Message<'s, Self>>>::next(Supercow::borrowed(self))
}
}
pub trait MessagesExt<'o, Owner: MessagesOwner + 'o> {
}
impl<'o, Owner: MessagesOwner + 'o> MessagesExt<'o, Owner> for Messages<'o, Owner>{
}
impl<'s, 'o: 's, Owner: MessagesOwner + 'o> StreamingIteratorExt<'s, Message<'s, Self>> for Messages<'o, Owner>
{
fn next<S: Into<Supercow<'s, Messages<'o, Owner>>>>(messages: S) -> Option<Message<'s, Self>>{
let messagesref = messages.into();
let valid = unsafe { ffi::notmuch_messages_valid(messagesref.handle.ptr) };
if valid == 0 {
return None;
}
let cmsg = unsafe {
let msg = ffi::notmuch_messages_get(messagesref.handle.ptr);
ffi::notmuch_messages_move_to_next(messagesref.handle.ptr);
msg
};
Some(Message::from_ptr(cmsg, Supercow::phantom(messagesref)))
}
}
unsafe impl<'o, Owner: MessagesOwner + 'o> Send for Messages<'o, Owner> {}
unsafe impl<'o, Owner: MessagesOwner + 'o> Sync for Messages<'o, Owner> {}
|
