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Use Option<T> to return from getters

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This removes the cumbersome &mut bool argument and offers overall
a more readable code.
This commit is contained in:
Anthony Ramine 2016-08-29 00:55:29 +02:00
parent 6e1523f4ae
commit 7dfb336be8
22 changed files with 72 additions and 109 deletions
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16
components/script/dom/document.rs
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@ -91,7 +91,7 @@ use euclid::point::Point2D;
use html5ever::tree_builder::{LimitedQuirks, NoQuirks, Quirks, QuirksMode};
use ipc_channel::ipc::{self, IpcSender};
use js::jsapi::JS_GetRuntime;
use js::jsapi::{JSContext, JSObject, JSRuntime, JS_NewPlainObject};
use js::jsapi::{JSContext, JSObject, JSRuntime};
use msg::constellation_msg::{ALT, CONTROL, SHIFT, SUPER};
use msg::constellation_msg::{Key, KeyModifiers, KeyState};
use msg::constellation_msg::{PipelineId, ReferrerPolicy, SubpageId};
@ -2691,8 +2691,7 @@ impl DocumentMethods for Document {
#[allow(unsafe_code)]
// https://html.spec.whatwg.org/multipage/#dom-tree-accessors:dom-document-nameditem-filter
fn NamedGetter(&self, cx: *mut JSContext, name: DOMString, found: &mut bool)
-> NonZero<*mut JSObject> {
fn NamedGetter(&self, _cx: *mut JSContext, name: DOMString) -> Option<NonZero<*mut JSObject>> {
#[derive(JSTraceable, HeapSizeOf)]
struct NamedElementFilter {
name: Atom,
@ -2758,28 +2757,23 @@ impl DocumentMethods for Document {
.peekable();
if let Some(first) = elements.next() {
if elements.peek().is_none() {
*found = true;
// TODO: Step 2.
// Step 3.
return unsafe {
NonZero::new(first.reflector().get_jsobject().get())
Some(NonZero::new(first.reflector().get_jsobject().get()))
};
}
} else {
*found = false;
return unsafe {
NonZero::new(JS_NewPlainObject(cx))
};
return None;
}
}
// Step 4.
*found = true;
let filter = NamedElementFilter {
name: name,
};
let collection = HTMLCollection::create(self.window(), root, box filter);
unsafe {
NonZero::new(collection.reflector().get_jsobject().get())
Some(NonZero::new(collection.reflector().get_jsobject().get()))
}
}