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use super::*;
use windows_core::*;
#[implement(IVectorView<T>, IIterable<T>)]
struct StockVectorView<T>
where
T: RuntimeType + 'static,
T::Default: Clone + PartialEq,
{
values: Vec<T::Default>,
}
impl<T> IIterable_Impl<T> for StockVectorView_Impl<T>
where
T: RuntimeType,
T::Default: Clone + PartialEq,
{
fn First(&self) -> Result<IIterator<T>> {
Ok(ComObject::new(StockVectorViewIterator {
owner: self.to_object(),
current: 0.into(),
})
.into_interface())
}
}
impl<T> IVectorView_Impl<T> for StockVectorView_Impl<T>
where
T: RuntimeType,
T::Default: Clone + PartialEq,
{
fn GetAt(&self, index: u32) -> Result<T> {
let item = self
.values
.get(index as usize)
.ok_or_else(|| Error::from(E_BOUNDS))?;
T::from_default(item)
}
fn Size(&self) -> Result<u32> {
Ok(self.values.len().try_into()?)
}
fn IndexOf(&self, value: Ref<T>, result: &mut u32) -> Result<bool> {
match self.values.iter().position(|element| element == &*value) {
Some(index) => {
*result = index as u32;
Ok(true)
}
None => Ok(false),
}
}
fn GetMany(&self, current: u32, values: &mut [T::Default]) -> Result<u32> {
let current = current as usize;
if current >= self.values.len() {
return Ok(0);
}
let actual = std::cmp::min(self.values.len() - current, values.len());
let (values, _) = values.split_at_mut(actual);
values.clone_from_slice(&self.values[current..current + actual]);
Ok(actual as u32)
}
}
#[implement(IIterator<T>)]
struct StockVectorViewIterator<T>
where
T: RuntimeType + 'static,
T::Default: Clone + PartialEq,
{
owner: ComObject<StockVectorView<T>>,
current: std::sync::atomic::AtomicUsize,
}
impl<T> IIterator_Impl<T> for StockVectorViewIterator_Impl<T>
where
T: RuntimeType,
T::Default: Clone + PartialEq,
{
fn Current(&self) -> Result<T> {
let current = self.current.load(std::sync::atomic::Ordering::Relaxed);
if let Some(item) = self.owner.values.get(current) {
T::from_default(item)
} else {
Err(Error::from(E_BOUNDS))
}
}
fn HasCurrent(&self) -> Result<bool> {
let current = self.current.load(std::sync::atomic::Ordering::Relaxed);
Ok(self.owner.values.len() > current)
}
fn MoveNext(&self) -> Result<bool> {
let current = self.current.load(std::sync::atomic::Ordering::Relaxed);
if current < self.owner.values.len() {
self.current
.fetch_add(1, std::sync::atomic::Ordering::Relaxed);
}
Ok(self.owner.values.len() > current + 1)
}
fn GetMany(&self, values: &mut [T::Default]) -> Result<u32> {
let current = self.current.load(std::sync::atomic::Ordering::Relaxed);
let actual = std::cmp::min(self.owner.values.len() - current, values.len());
let (values, _) = values.split_at_mut(actual);
values.clone_from_slice(&self.owner.values[current..current + actual]);
self.current
.fetch_add(actual, std::sync::atomic::Ordering::Relaxed);
Ok(actual as u32)
}
}
impl<T> From<Vec<T::Default>> for IVectorView<T>
where
T: RuntimeType,
T::Default: Clone + PartialEq,
{
fn from(values: Vec<T::Default>) -> Self {
ComObject::new(StockVectorView { values }).into_interface()
}
}