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110 lines
3.5 KiB
Rust
110 lines
3.5 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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//! The `MozMap` (open-ended dictionary) type.
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use dom::bindings::conversions::jsid_to_string;
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use dom::bindings::str::DOMString;
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use js::conversions::{FromJSValConvertible, ToJSValConvertible, ConversionResult};
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use js::jsapi::GetPropertyKeys;
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use js::jsapi::HandleValue;
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use js::jsapi::JSContext;
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use js::jsapi::JSITER_OWNONLY;
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use js::jsapi::JSPROP_ENUMERATE;
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use js::jsapi::JS_DefineUCProperty2;
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use js::jsapi::JS_GetPropertyById;
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use js::jsapi::JS_NewPlainObject;
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use js::jsapi::MutableHandleValue;
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use js::jsval::ObjectValue;
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use js::jsval::UndefinedValue;
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use js::rust::IdVector;
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use std::collections::HashMap;
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use std::ops::Deref;
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/// The `MozMap` (open-ended dictionary) type.
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#[derive(Clone)]
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pub struct MozMap<T> {
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map: HashMap<DOMString, T>,
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}
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impl<T> MozMap<T> {
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/// Create an empty `MozMap`.
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pub fn new() -> Self {
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MozMap {
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map: HashMap::new(),
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}
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}
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}
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impl<T> Deref for MozMap<T> {
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type Target = HashMap<DOMString, T>;
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fn deref(&self) -> &HashMap<DOMString, T> {
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&self.map
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}
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}
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impl<T, C> FromJSValConvertible for MozMap<T>
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where T: FromJSValConvertible<Config=C>,
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C: Clone,
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{
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type Config = C;
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unsafe fn from_jsval(cx: *mut JSContext, value: HandleValue, config: C)
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-> Result<ConversionResult<Self>, ()> {
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if !value.is_object() {
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return Ok(ConversionResult::Failure("MozMap value was not an object".into()));
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}
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rooted!(in(cx) let object = value.to_object());
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let ids = IdVector::new(cx);
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assert!(GetPropertyKeys(cx, object.handle(), JSITER_OWNONLY, ids.get()));
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let mut map = HashMap::new();
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for id in &*ids {
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rooted!(in(cx) let id = *id);
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rooted!(in(cx) let mut property = UndefinedValue());
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if !JS_GetPropertyById(cx, object.handle(), id.handle(), property.handle_mut()) {
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return Err(());
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}
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let property = match try!(T::from_jsval(cx, property.handle(), config.clone())) {
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ConversionResult::Success(property) => property,
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ConversionResult::Failure(message) => return Ok(ConversionResult::Failure(message)),
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};
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let key = jsid_to_string(cx, id.handle()).unwrap();
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map.insert(key, property);
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}
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Ok(ConversionResult::Success(MozMap {
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map: map,
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}))
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}
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}
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impl<T: ToJSValConvertible> ToJSValConvertible for MozMap<T> {
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#[inline]
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unsafe fn to_jsval(&self, cx: *mut JSContext, rval: MutableHandleValue) {
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rooted!(in(cx) let js_object = JS_NewPlainObject(cx));
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assert!(!js_object.handle().is_null());
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rooted!(in(cx) let mut js_value = UndefinedValue());
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for (key, value) in &self.map {
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let key = key.encode_utf16().collect::<Vec<_>>();
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value.to_jsval(cx, js_value.handle_mut());
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assert!(JS_DefineUCProperty2(cx,
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js_object.handle(),
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key.as_ptr(),
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key.len(),
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js_value.handle(),
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JSPROP_ENUMERATE,
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None,
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None));
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}
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rval.set(ObjectValue(js_object.handle().get()));
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}
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}
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