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Implement [Func]
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parent
0d04acd50f
commit
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6 changed files with 58 additions and 8 deletions
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@ -1334,8 +1334,11 @@ def MemberCondition(pref, func):
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"""
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assert pref is None or isinstance(pref, str)
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assert func is None or isinstance(func, str)
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assert func is None or pref is None
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if pref:
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return 'Condition::Pref("%s")' % pref
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if func:
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return 'Condition::Func(%s)' % func
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return "Condition::Satisfied"
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@ -4,6 +4,7 @@
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//! Machinery to conditionally expose things.
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use js::jsapi::{HandleObject, JSContext};
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use util::prefs::get_pref;
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/// A container with a condition.
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@ -22,8 +23,10 @@ impl<T: Clone + Copy> Guard<T> {
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}
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/// Expose the value if the condition is satisfied.
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pub fn expose(&self) -> Option<T> {
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if self.condition.is_satisfied() {
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///
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/// The passed handle is the object on which the value may be exposed.
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pub unsafe fn expose(&self, cx: *mut JSContext, obj: HandleObject) -> Option<T> {
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if self.condition.is_satisfied(cx, obj) {
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Some(self.value)
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} else {
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None
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@ -33,6 +36,8 @@ impl<T: Clone + Copy> Guard<T> {
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/// A condition to expose things.
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pub enum Condition {
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/// The condition is satisfied if the function returns true.
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Func(unsafe fn(*mut JSContext, HandleObject) -> bool),
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/// The condition is satisfied if the preference is set.
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Pref(&'static str),
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/// The condition is always satisfied.
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@ -40,9 +45,10 @@ pub enum Condition {
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}
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impl Condition {
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fn is_satisfied(&self) -> bool {
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unsafe fn is_satisfied(&self, cx: *mut JSContext, obj: HandleObject) -> bool {
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match *self {
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Condition::Pref(name) => get_pref(name).as_boolean().unwrap_or(false),
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Condition::Func(f) => f(cx, obj),
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Condition::Satisfied => true,
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}
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}
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@ -220,7 +220,7 @@ pub unsafe fn create_callback_interface_object(
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rval.set(JS_NewObject(cx, ptr::null()));
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assert!(!rval.ptr.is_null());
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for guard in constants {
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if let Some(specs) = guard.expose() {
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if let Some(specs) = guard.expose(cx, rval.handle()) {
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define_constants(cx, rval.handle(), specs);
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}
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}
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@ -369,7 +369,7 @@ unsafe fn create_object(
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define_guarded_methods(cx, rval.handle(), methods);
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define_guarded_properties(cx, rval.handle(), properties);
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for guard in constants {
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if let Some(specs) = guard.expose() {
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if let Some(specs) = guard.expose(cx, rval.handle()) {
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define_constants(cx, rval.handle(), specs);
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}
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}
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@ -381,7 +381,7 @@ pub unsafe fn define_guarded_methods(
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obj: HandleObject,
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methods: &[Guard<&'static [JSFunctionSpec]>]) {
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for guard in methods {
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if let Some(specs) = guard.expose() {
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if let Some(specs) = guard.expose(cx, obj) {
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define_methods(cx, obj, specs).unwrap();
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}
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}
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@ -393,7 +393,7 @@ pub unsafe fn define_guarded_properties(
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obj: HandleObject,
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properties: &[Guard<&'static [JSPropertySpec]>]) {
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for guard in properties {
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if let Some(specs) = guard.expose() {
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if let Some(specs) = guard.expose(cx, obj) {
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define_properties(cx, obj, specs).unwrap();
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}
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}
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