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Implement [Func]

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This commit is contained in:
Anthony Ramine 2016-05-21 00:09:06 +02:00
parent 0d04acd50f
commit e179cb02ff
6 changed files with 58 additions and 8 deletions
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3
components/script/dom/bindings/codegen/CodegenRust.py
View file

@ -1334,8 +1334,11 @@ def MemberCondition(pref, func):
"""
assert pref is None or isinstance(pref, str)
assert func is None or isinstance(func, str)
assert func is None or pref is None
if pref:
return 'Condition::Pref("%s")' % pref
if func:
return 'Condition::Func(%s)' % func
return "Condition::Satisfied"

12
components/script/dom/bindings/guard.rs
View file

@ -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,
}
}

8
components/script/dom/bindings/interface.rs
View file

@ -220,7 +220,7 @@ pub unsafe fn create_callback_interface_object(
rval.set(JS_NewObject(cx, ptr::null()));
assert!(!rval.ptr.is_null());
for guard in constants {
if let Some(specs) = guard.expose() {
if let Some(specs) = guard.expose(cx, rval.handle()) {
define_constants(cx, rval.handle(), specs);
}
}
@ -369,7 +369,7 @@ unsafe fn create_object(
define_guarded_methods(cx, rval.handle(), methods);
define_guarded_properties(cx, rval.handle(), properties);
for guard in constants {
if let Some(specs) = guard.expose() {
if let Some(specs) = guard.expose(cx, rval.handle()) {
define_constants(cx, rval.handle(), specs);
}
}
@ -381,7 +381,7 @@ pub unsafe fn define_guarded_methods(
obj: HandleObject,
methods: &[Guard<&'static [JSFunctionSpec]>]) {
for guard in methods {
if let Some(specs) = guard.expose() {
if let Some(specs) = guard.expose(cx, obj) {
define_methods(cx, obj, specs).unwrap();
}
}
@ -393,7 +393,7 @@ pub unsafe fn define_guarded_properties(
obj: HandleObject,
properties: &[Guard<&'static [JSPropertySpec]>]) {
for guard in properties {
if let Some(specs) = guard.expose() {
if let Some(specs) = guard.expose(cx, obj) {
define_properties(cx, obj, specs).unwrap();
}
}