mirror of
https://github.com/servo/servo.git
synced 2025-08-03 04:30:10 +01:00
Implement [Func]
This commit is contained in:
parent
0d04acd50f
commit
e179cb02ff
6 changed files with 58 additions and 8 deletions
|
@ -4,6 +4,7 @@
|
|||
|
||||
//! Machinery to conditionally expose things.
|
||||
|
||||
use js::jsapi::{HandleObject, JSContext};
|
||||
use util::prefs::get_pref;
|
||||
|
||||
/// A container with a condition.
|
||||
|
@ -22,8 +23,10 @@ impl<T: Clone + Copy> Guard<T> {
|
|||
}
|
||||
|
||||
/// Expose the value if the condition is satisfied.
|
||||
pub fn expose(&self) -> Option<T> {
|
||||
if self.condition.is_satisfied() {
|
||||
///
|
||||
/// The passed handle is the object on which the value may be exposed.
|
||||
pub unsafe fn expose(&self, cx: *mut JSContext, obj: HandleObject) -> Option<T> {
|
||||
if self.condition.is_satisfied(cx, obj) {
|
||||
Some(self.value)
|
||||
} else {
|
||||
None
|
||||
|
@ -33,6 +36,8 @@ impl<T: Clone + Copy> Guard<T> {
|
|||
|
||||
/// A condition to expose things.
|
||||
pub enum Condition {
|
||||
/// The condition is satisfied if the function returns true.
|
||||
Func(unsafe fn(*mut JSContext, HandleObject) -> bool),
|
||||
/// The condition is satisfied if the preference is set.
|
||||
Pref(&'static str),
|
||||
/// The condition is always satisfied.
|
||||
|
@ -40,9 +45,10 @@ pub enum Condition {
|
|||
}
|
||||
|
||||
impl Condition {
|
||||
fn is_satisfied(&self) -> bool {
|
||||
unsafe fn is_satisfied(&self, cx: *mut JSContext, obj: HandleObject) -> bool {
|
||||
match *self {
|
||||
Condition::Pref(name) => get_pref(name).as_boolean().unwrap_or(false),
|
||||
Condition::Func(f) => f(cx, obj),
|
||||
Condition::Satisfied => true,
|
||||
}
|
||||
}
|
||||
|
|
Loading…
Add table
Add a link
Reference in a new issue