script/dom/html/
htmlbaseelement.rs

1/* This Source Code Form is subject to the terms of the Mozilla Public
2 * License, v. 2.0. If a copy of the MPL was not distributed with this
3 * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
4
5use dom_struct::dom_struct;
6use html5ever::{LocalName, Prefix, local_name, ns};
7use js::rust::HandleObject;
8use servo_url::ServoUrl;
9
10use crate::dom::attr::Attr;
11use crate::dom::bindings::codegen::Bindings::HTMLBaseElementBinding::HTMLBaseElementMethods;
12use crate::dom::bindings::inheritance::Castable;
13use crate::dom::bindings::root::DomRoot;
14use crate::dom::bindings::str::DOMString;
15use crate::dom::document::Document;
16use crate::dom::element::{AttributeMutation, Element};
17use crate::dom::html::htmlelement::HTMLElement;
18use crate::dom::node::{BindContext, Node, NodeTraits, UnbindContext};
19use crate::dom::virtualmethods::VirtualMethods;
20use crate::script_runtime::CanGc;
21
22#[dom_struct]
23pub(crate) struct HTMLBaseElement {
24    htmlelement: HTMLElement,
25}
26
27impl HTMLBaseElement {
28    fn new_inherited(
29        local_name: LocalName,
30        prefix: Option<Prefix>,
31        document: &Document,
32    ) -> HTMLBaseElement {
33        HTMLBaseElement {
34            htmlelement: HTMLElement::new_inherited(local_name, prefix, document),
35        }
36    }
37
38    #[cfg_attr(crown, allow(crown::unrooted_must_root))]
39    pub(crate) fn new(
40        local_name: LocalName,
41        prefix: Option<Prefix>,
42        document: &Document,
43        proto: Option<HandleObject>,
44        can_gc: CanGc,
45    ) -> DomRoot<HTMLBaseElement> {
46        Node::reflect_node_with_proto(
47            Box::new(HTMLBaseElement::new_inherited(local_name, prefix, document)),
48            document,
49            proto,
50            can_gc,
51        )
52    }
53
54    /// <https://html.spec.whatwg.org/multipage/#frozen-base-url>
55    pub(crate) fn frozen_base_url(&self) -> ServoUrl {
56        let href = self
57            .upcast::<Element>()
58            .get_attribute(&ns!(), &local_name!("href"))
59            .expect(
60                "The frozen base url is only defined for base elements \
61                 that have a base url.",
62            );
63        let document = self.owner_document();
64        let base = document.fallback_base_url();
65        let parsed = base.join(&href.value());
66        parsed.unwrap_or(base)
67    }
68
69    /// Update the cached base element in response to binding or unbinding from
70    /// a tree.
71    pub(crate) fn bind_unbind(&self, tree_in_doc: bool) {
72        if !tree_in_doc || self.upcast::<Node>().containing_shadow_root().is_some() {
73            return;
74        }
75
76        if self.upcast::<Element>().has_attribute(&local_name!("href")) {
77            let document = self.owner_document();
78            document.refresh_base_element();
79        }
80    }
81}
82
83impl HTMLBaseElementMethods<crate::DomTypeHolder> for HTMLBaseElement {
84    // https://html.spec.whatwg.org/multipage/#dom-base-href
85    fn Href(&self) -> DOMString {
86        // Step 1.
87        let document = self.owner_document();
88
89        // Step 2.
90        let attr = self
91            .upcast::<Element>()
92            .get_attribute(&ns!(), &local_name!("href"));
93        let value = attr.as_ref().map(|attr| attr.value());
94        let url = value.as_ref().map_or("", |value| &**value);
95
96        // Step 3.
97        let url_record = document.fallback_base_url().join(url);
98
99        match url_record {
100            Err(_) => {
101                // Step 4.
102                url.into()
103            },
104            Ok(url_record) => {
105                // Step 5.
106                url_record.into_string().into()
107            },
108        }
109    }
110
111    // https://html.spec.whatwg.org/multipage/#dom-base-href
112    make_setter!(SetHref, "href");
113}
114
115impl VirtualMethods for HTMLBaseElement {
116    fn super_type(&self) -> Option<&dyn VirtualMethods> {
117        Some(self.upcast::<HTMLElement>() as &dyn VirtualMethods)
118    }
119
120    fn attribute_mutated(&self, attr: &Attr, mutation: AttributeMutation, can_gc: CanGc) {
121        self.super_type()
122            .unwrap()
123            .attribute_mutated(attr, mutation, can_gc);
124        if *attr.local_name() == local_name!("href") {
125            self.owner_document().refresh_base_element();
126        }
127    }
128
129    fn bind_to_tree(&self, context: &BindContext, can_gc: CanGc) {
130        self.super_type().unwrap().bind_to_tree(context, can_gc);
131        self.bind_unbind(context.tree_is_in_a_document_tree);
132    }
133
134    fn unbind_from_tree(&self, context: &UnbindContext, can_gc: CanGc) {
135        self.super_type().unwrap().unbind_from_tree(context, can_gc);
136        self.bind_unbind(context.tree_is_in_a_document_tree);
137    }
138}
script/dom/html/htmlbaseelement.rs

script/dom/html/
htmlbaseelement.rs
