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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 dom::bindings::js::JSRef;
use dom::bindings::trace::Traceable;
use dom::bindings::utils::{Reflectable, global_object_for_js_object};
use js::jsapi::{JSContext, JSObject, JS_WrapObject, JS_ObjectIsCallable};
use js::jsapi::JS_GetProperty;
use js::jsval::{JSVal, UndefinedValue};
use std::ptr;
use serialize::{Encodable, Encoder};
pub enum ExceptionHandling {
// Report any exception and don't throw it to the caller code.
ReportExceptions,
// Throw an exception to the caller code if the thrown exception is a
// binding object for a DOMError from the caller's scope, otherwise report
// it.
RethrowContentExceptions,
// Throw any exception to the caller code.
RethrowExceptions
}
#[deriving(Clone,PartialEq,Encodable)]
pub struct CallbackFunction {
object: CallbackObject
}
impl CallbackFunction {
pub fn new(callback: *mut JSObject) -> CallbackFunction {
CallbackFunction {
object: CallbackObject {
callback: Traceable::new(callback)
}
}
}
}
#[deriving(Clone,PartialEq,Encodable)]
pub struct CallbackInterface {
object: CallbackObject
}
#[allow(raw_pointer_deriving)]
#[deriving(Clone,PartialEq,Encodable)]
struct CallbackObject {
callback: Traceable<*mut JSObject>,
}
pub trait CallbackContainer {
fn new(callback: *mut JSObject) -> Self;
fn callback(&self) -> *mut JSObject;
}
impl CallbackInterface {
pub fn callback(&self) -> *mut JSObject {
*self.object.callback
}
}
impl CallbackFunction {
pub fn callback(&self) -> *mut JSObject {
*self.object.callback
}
}
impl CallbackInterface {
pub fn new(callback: *mut JSObject) -> CallbackInterface {
CallbackInterface {
object: CallbackObject {
callback: Traceable::new(callback)
}
}
}
pub fn GetCallableProperty(&self, cx: *mut JSContext, name: &str) -> Result<JSVal, ()> {
let mut callable = UndefinedValue();
unsafe {
if name.to_c_str().with_ref(|name| JS_GetProperty(cx, self.callback(), name, &mut callable)) == 0 {
return Err(());
}
if !callable.is_object() ||
JS_ObjectIsCallable(cx, callable.to_object()) == 0 {
//ThrowErrorMessage(cx, MSG_NOT_CALLABLE, description.get());
return Err(());
}
}
Ok(callable)
}
}
pub fn WrapCallThisObject<T: Reflectable>(cx: *mut JSContext,
p: &JSRef<T>) -> *mut JSObject {
let mut obj = p.reflector().get_jsobject();
assert!(obj.is_not_null());
unsafe {
if JS_WrapObject(cx, &mut obj) == 0 {
return ptr::mut_null();
}
}
return obj;
}
pub struct CallSetup {
cx: *mut JSContext,
_handling: ExceptionHandling
}
impl CallSetup {
pub fn new<T: CallbackContainer>(callback: &T, handling: ExceptionHandling) -> CallSetup {
let global = global_object_for_js_object(callback.callback()).root();
let cx = global.deref().get_cx();
CallSetup {
cx: cx,
_handling: handling
}
}
pub fn GetContext(&self) -> *mut JSContext {
self.cx
}
}
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