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124 lines
4 KiB
Rust
124 lines
4 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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use dom::bindings::codegen::Bindings::NodeIteratorBinding;
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use dom::bindings::codegen::Bindings::NodeIteratorBinding::NodeIteratorMethods;
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use dom::bindings::codegen::Bindings::NodeFilterBinding::NodeFilter;
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use dom::bindings::error::Fallible;
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use dom::bindings::global::GlobalRef;
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use dom::bindings::js::{JS, JSRef, MutNullableHeap, Temporary, Rootable};
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use dom::bindings::utils::{Reflector, reflect_dom_object};
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use dom::document::{Document, DocumentHelpers};
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use dom::node::{Node};
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#[dom_struct]
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pub struct NodeIterator {
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reflector_: Reflector,
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root_node: JS<Node>,
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reference_node: MutNullableHeap<JS<Node>>,
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what_to_show: u32,
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filter: Filter
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}
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impl NodeIterator {
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fn new_inherited(root_node: JSRef<Node>,
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what_to_show: u32,
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filter: Filter) -> NodeIterator {
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NodeIterator {
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reflector_: Reflector::new(),
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root_node: JS::from_rooted(root_node),
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reference_node: MutNullableHeap::new(Some(JS::from_rooted(root_node))),
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what_to_show: what_to_show,
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filter: filter
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}
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}
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pub fn new_with_filter(document: JSRef<Document>,
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root_node: JSRef<Node>,
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what_to_show: u32,
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filter: Filter) -> Temporary<NodeIterator> {
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let window = document.window().root();
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reflect_dom_object(box NodeIterator::new_inherited(root_node, what_to_show, filter),
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GlobalRef::Window(window.r()),
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NodeIteratorBinding::Wrap)
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}
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pub fn new(document: JSRef<Document>,
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root_node: JSRef<Node>,
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what_to_show: u32,
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node_filter: Option<NodeFilter>) -> Temporary<NodeIterator> {
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let filter = match node_filter {
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None => Filter::None,
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Some(jsfilter) => Filter::JS(jsfilter)
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};
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NodeIterator::new_with_filter(document, root_node, what_to_show, filter)
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}
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}
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impl<'a> NodeIteratorMethods for JSRef<'a, NodeIterator> {
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// https://dom.spec.whatwg.org/#dom-nodeiterator-root
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fn Root(self) -> Temporary<Node> {
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Temporary::from_rooted(self.root_node)
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}
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// https://dom.spec.whatwg.org/#dom-nodeiterator-whattoshow
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fn WhatToShow(self) -> u32 {
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self.what_to_show
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}
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// https://dom.spec.whatwg.org/#dom-nodeiterator-filter
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fn GetFilter(self) -> Option<NodeFilter> {
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match self.filter {
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Filter::None => None,
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Filter::JS(nf) => Some(nf),
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Filter::Native(_) => panic!("Cannot convert native node filter to DOM NodeFilter")
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}
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}
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// https://dom.spec.whatwg.org/#dom-nodeiterator-referencenode
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fn GetReferenceNode(self) -> Option<Temporary<Node>> {
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self.reference_node.get().map(Temporary::from_rooted)
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}
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// https://dom.spec.whatwg.org/#dom-nodeiterator-previousnode
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fn PreviousNode(self) -> Fallible<Option<Temporary<Node>>> {
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self.prev_node()
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}
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// https://dom.spec.whatwg.org/#dom-nodeiterator-nextnode
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fn NextNode(self) -> Fallible<Option<Temporary<Node>>> {
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self.next_node()
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}
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}
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/*
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trait PrivateNodeIteratorHelpers {
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//fn accept_node(self, node: JSRef<Node>) -> Fallible<u16>;
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}
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*/
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pub trait NodeIteratorHelpers {
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fn next_node(self) -> Fallible<Option<Temporary<Node>>>;
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fn prev_node(self) -> Fallible<Option<Temporary<Node>>>;
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}
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impl<'a> NodeIteratorHelpers for JSRef<'a, NodeIterator> {
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// https://dom.spec.whatwg.org/#dom-nodeiterator-nextnode
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fn next_node(self) -> Fallible<Option<Temporary<Node>>> {
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Ok(None)
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}
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// https://dom.spec.whatwg.org/#dom-nodeiterator-previousnode
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fn prev_node(self) -> Fallible<Option<Temporary<Node>>> {
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Ok(None)
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}
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}
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#[jstraceable]
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pub enum Filter {
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None,
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Native(fn (node: JSRef<Node>) -> u16),
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JS(NodeFilter)
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}
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