mirror of
https://github.com/servo/servo.git
synced 2025-06-08 08:33:26 +00:00
67 lines
2 KiB
Rust
67 lines
2 KiB
Rust
/* 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/. */
|
|
|
|
//! WebIDL constants.
|
|
|
|
use js::jsapi::{JSPROP_ENUMERATE, JSPROP_PERMANENT, JSPROP_READONLY};
|
|
use js::jsval::{BooleanValue, DoubleValue, Int32Value, JSVal, NullValue, UInt32Value};
|
|
use js::rust::wrappers::JS_DefineProperty;
|
|
use js::rust::HandleObject;
|
|
|
|
use crate::script_runtime::JSContext;
|
|
|
|
/// Representation of an IDL constant.
|
|
#[derive(Clone)]
|
|
pub struct ConstantSpec {
|
|
/// name of the constant.
|
|
pub name: &'static [u8],
|
|
/// value of the constant.
|
|
pub value: ConstantVal,
|
|
}
|
|
|
|
/// Representation of an IDL constant value.
|
|
#[derive(Clone)]
|
|
#[allow(dead_code)]
|
|
pub enum ConstantVal {
|
|
/// `long` constant.
|
|
IntVal(i32),
|
|
/// `unsigned long` constant.
|
|
UintVal(u32),
|
|
/// `double` constant.
|
|
DoubleVal(f64),
|
|
/// `boolean` constant.
|
|
BoolVal(bool),
|
|
/// `null` constant.
|
|
NullVal,
|
|
}
|
|
|
|
impl ConstantSpec {
|
|
/// Returns a `JSVal` that represents the value of this `ConstantSpec`.
|
|
pub fn get_value(&self) -> JSVal {
|
|
match self.value {
|
|
ConstantVal::NullVal => NullValue(),
|
|
ConstantVal::IntVal(i) => Int32Value(i),
|
|
ConstantVal::UintVal(u) => UInt32Value(u),
|
|
ConstantVal::DoubleVal(d) => DoubleValue(d),
|
|
ConstantVal::BoolVal(b) => BooleanValue(b),
|
|
}
|
|
}
|
|
}
|
|
|
|
/// Defines constants on `obj`.
|
|
/// Fails on JSAPI failure.
|
|
pub fn define_constants(cx: JSContext, obj: HandleObject, constants: &[ConstantSpec]) {
|
|
for spec in constants {
|
|
rooted!(in(*cx) let value = spec.get_value());
|
|
unsafe {
|
|
assert!(JS_DefineProperty(
|
|
*cx,
|
|
obj,
|
|
spec.name.as_ptr() as *const libc::c_char,
|
|
value.handle(),
|
|
(JSPROP_ENUMERATE | JSPROP_READONLY | JSPROP_PERMANENT) as u32
|
|
));
|
|
}
|
|
}
|
|
}
|