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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 http://mozilla.org/MPL/2.0/. */
use std::collections::BTreeMap;
pub type Preferences = BTreeMap<String, Pref>;
#[derive(Debug, PartialEq, Clone)]
pub enum PrefValue {
Bool(bool),
String(String),
Int(i64),
}
impl From<bool> for PrefValue {
fn from(value: bool) -> Self {
PrefValue::Bool(value)
}
}
impl From<String> for PrefValue {
fn from(value: String) -> Self {
PrefValue::String(value)
}
}
impl From<&'static str> for PrefValue {
fn from(value: &'static str) -> Self {
PrefValue::String(value.into())
}
}
impl From<i8> for PrefValue {
fn from(value: i8) -> Self {
PrefValue::Int(value.into())
}
}
impl From<u8> for PrefValue {
fn from(value: u8) -> Self {
PrefValue::Int(value.into())
}
}
impl From<i16> for PrefValue {
fn from(value: i16) -> Self {
PrefValue::Int(value.into())
}
}
impl From<u16> for PrefValue {
fn from(value: u16) -> Self {
PrefValue::Int(value.into())
}
}
impl From<i32> for PrefValue {
fn from(value: i32) -> Self {
PrefValue::Int(value.into())
}
}
impl From<u32> for PrefValue {
fn from(value: u32) -> Self {
PrefValue::Int(value.into())
}
}
impl From<i64> for PrefValue {
fn from(value: i64) -> Self {
PrefValue::Int(value)
}
}
// Implementing From<u64> for PrefValue wouldn't be safe
// because it might overflow.
#[derive(Debug, PartialEq, Clone)]
pub struct Pref {
pub value: PrefValue,
pub sticky: bool,
}
impl Pref {
/// Create a new preference with `value`.
pub fn new<T>(value: T) -> Pref
where
T: Into<PrefValue>,
{
Pref {
value: value.into(),
sticky: false,
}
}
/// Create a new sticky, or locked, preference with `value`.
/// These cannot be changed by the user in `about:config`.
pub fn new_sticky<T>(value: T) -> Pref
where
T: Into<PrefValue>,
{
Pref {
value: value.into(),
sticky: true,
}
}
}
#[cfg(test)]
mod test {
use super::PrefValue;
#[test]
fn test_bool() {
assert_eq!(PrefValue::from(true), PrefValue::Bool(true));
}
#[test]
fn test_string() {
assert_eq!(PrefValue::from("foo"), PrefValue::String("foo".to_string()));
assert_eq!(
PrefValue::from("foo".to_string()),
PrefValue::String("foo".to_string())
);
}
#[test]
fn test_int() {
assert_eq!(PrefValue::from(42i8), PrefValue::Int(42i64));
assert_eq!(PrefValue::from(42u8), PrefValue::Int(42i64));
assert_eq!(PrefValue::from(42i16), PrefValue::Int(42i64));
assert_eq!(PrefValue::from(42u16), PrefValue::Int(42i64));
assert_eq!(PrefValue::from(42i32), PrefValue::Int(42i64));
assert_eq!(PrefValue::from(42u32), PrefValue::Int(42i64));
assert_eq!(PrefValue::from(42i64), PrefValue::Int(42i64));
}
}
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