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#![allow(non_camel_case_types, non_snake_case)]
use crate::co;
use crate::decl::*;
use crate::kernel::ffi_types::*;
use crate::ole::privs::*;
use crate::prelude::*;
use crate::shell::iterators::*;
use crate::vt::*;
/// [`IEnumShellItems`](crate::IEnumShellItems) virtual table.
#[repr(C)]
pub struct IEnumShellItemsVT {
pub IUnknownVT: IUnknownVT,
pub Next: fn(COMPTR, u32, *mut COMPTR, *mut u32) -> HRES,
pub Skip: fn(COMPTR, u32) -> HRES,
pub Reset: fn(COMPTR) -> HRES,
pub Clone: fn(COMPTR, *mut COMPTR) -> HRES,
}
com_interface! { IEnumShellItems: "70629033-e363-4a28-a567-0db78006e6d7";
/// [`IEnumShellItems`](https://learn.microsoft.com/en-us/windows/win32/api/shobjidl_core/nn-shobjidl_core-ienumshellitems)
/// COM interface over [`IEnumShellItemsVT`](crate::vt::IEnumShellItemsVT).
///
/// Automatically calls
/// [`IUnknown::Release`](https://learn.microsoft.com/en-us/windows/win32/api/unknwn/nf-unknwn-iunknown-release)
/// when the object goes out of scope.
}
impl shell_IEnumShellItems for IEnumShellItems {}
/// This trait is enabled with the `shell` feature, and provides methods for
/// [`IEnumShellItems`](crate::IEnumShellItems).
///
/// Prefer importing this trait through the prelude:
///
/// ```no_run
/// use winsafe::prelude::*;
/// ```
pub trait shell_IEnumShellItems: ole_IUnknown {
/// Returns an iterator over the [`IShellItem`](crate::IShellItem) elements
/// which calls
/// [`IEnumShellItems::Next`](crate::prelude::shell_IEnumShellItems::Next)
/// internally.
///
/// # Examples
///
/// Enumerating the items in a folder by iterating over the
/// [`IShellItem`](crate::IShellItem) objects:
///
/// ```no_run
/// use winsafe::{self as w, prelude::*, co};
///
/// let folder = w::SHCreateItemFromParsingName::<w::IShellItem>(
/// "C:\\Temp",
/// None::<&w::IBindCtx>,
/// )?;
///
/// let items = folder.BindToHandler::<w::IEnumShellItems>(
/// None::<&w::IBindCtx>,
/// &co::BHID::EnumItems,
/// )?;
///
/// for item in items.iter() {
/// let item = item?;
/// println!("{}", item.GetDisplayName(co::SIGDN::FILESYSPATH)?);
/// }
/// # w::HrResult::Ok(())
/// ```
#[must_use]
fn iter(&self) -> impl Iterator<Item = HrResult<IShellItem>> + '_ {
IenumshellitemsIter::new(self)
}
/// [`IEnumShellItems::Next`](https://learn.microsoft.com/en-us/windows/win32/api/shobjidl_core/nf-shobjidl_core-ienumshellitems-next)
/// method.
///
/// Prefer using
/// [`IEnumShellItems::iter`](crate::prelude::shell_IEnumShellItems::iter),
/// which is simpler.
#[must_use]
fn Next(&self) -> HrResult<Option<IShellItem>> {
let mut queried = unsafe { IShellItem::null() };
let mut fetched = u32::default();
match ok_to_hrresult(
unsafe {
(vt::<IEnumShellItemsVT>(self).Next)(
self.ptr(),
1, // retrieve only 1
queried.as_mut(),
&mut fetched,
)
},
) {
Ok(_) => Ok(Some(queried)),
Err(hr) => match hr {
co::HRESULT::S_FALSE => Ok(None), // no item found
hr => Err(hr), // actual error
},
}
}
fn_com_noparm! { Reset: IEnumShellItemsVT;
/// [`IEnumShellItems::Reset`](https://learn.microsoft.com/en-us/windows/win32/api/shobjidl_core/nf-shobjidl_core-ienumshellitems-reset)
/// method.
}
/// [`IEnumShellItems::Skip`](https://learn.microsoft.com/en-us/windows/win32/api/shobjidl_core/nf-shobjidl_core-ienumshellitems-skip)
/// method.
fn Skip(&self, count: u32) -> HrResult<bool> {
okfalse_to_hrresult(
unsafe { (vt::<IEnumShellItemsVT>(self).Skip)(self.ptr(), count) },
)
}
}