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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
//! Implementation of `setlike<...>` and `maplike<..., ...>` WebIDL declarations.
use js::conversions::ToJSValConvertible;
use crate::iterable::Iterable;
/// Every Setlike dom_struct must implement this to provide access to underlying storage
/// so codegen can automatically generate all setlike methods
///
/// In case you use a type that implements Setlike as underlying storage it's recommended to use `setlike` macro.
// In webidl: `setlike<Key>`
pub trait Setlike {
/// The type of the key of the set.
type Key: ToJSValConvertible + Clone; // clone is for impl<T: Setlike> Maplike for T
fn get_index(&self, index: u32) -> Option<Self::Key>;
fn size(&self) -> u32;
fn add(&self, key: Self::Key);
fn has(&self, key: Self::Key) -> bool;
fn clear(&self);
fn delete(&self, key: Self::Key) -> bool;
}
// we can only have one iterable for T
// so we have impl<T: Maplike> Iterable for T
// and minimal:
impl<T: Setlike> Maplike for T {
type Key = <T as Setlike>::Key;
type Value = <T as Setlike>::Key;
#[inline]
fn get_index(&self, index: u32) -> Option<(Self::Key, Self::Value)> {
self.get_index(index).map(|k| (k.clone(), k))
}
fn get(&self, _key: Self::Key) -> Option<Self::Value> {
unimplemented!()
}
#[inline]
fn size(&self) -> u32 {
self.size()
}
fn set(&self, _key: Self::Key, _value: Self::Value) {
unimplemented!()
}
fn has(&self, _key: Self::Key) -> bool {
unimplemented!()
}
fn clear(&self) {
unimplemented!()
}
fn delete(&self, _key: Self::Key) -> bool {
unimplemented!()
}
}
/// Every Maplike dom_struct must implement this
/// to provide access to underlying storage
/// so codegen can automatically generate all maplike methods
///
/// In case you use a type that implements Maplike as underlying storage it's recommended to use `maplike` macro.
// In webidl: `maplike<Key, Value>`
pub trait Maplike {
/// The type of the key of the map.
type Key: ToJSValConvertible;
/// The type of the value of the map.
type Value: ToJSValConvertible;
fn get_index(&self, index: u32) -> Option<(Self::Key, Self::Value)>;
fn get(&self, key: Self::Key) -> Option<Self::Value>;
fn size(&self) -> u32;
fn set(&self, key: Self::Key, value: Self::Value);
fn has(&self, key: Self::Key) -> bool;
fn clear(&self);
fn delete(&self, key: Self::Key) -> bool;
}
impl<T: Maplike> Iterable for T {
type Key = T::Key;
type Value = T::Value;
#[inline]
fn get_iterable_length(&self) -> u32 {
self.size()
}
#[inline]
fn get_value_at_index(&self, index: u32) -> <T as Maplike>::Value {
// SAFETY: we are checking bounds manually
self.get_index(index).unwrap().1
}
#[inline]
fn get_key_at_index(&self, index: u32) -> <T as Maplike>::Key {
// SAFETY: we are checking bounds manually
self.get_index(index).unwrap().0
}
}
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