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    pub(crate) fn new(
39        local_name: LocalName,
40        prefix: Option<Prefix>,
41        document: &Document,
42        proto: Option<HandleObject>,
43        can_gc: CanGc,
44    ) -> DomRoot<HTMLBaseElement> {
45        Node::reflect_node_with_proto(
46            Box::new(HTMLBaseElement::new_inherited(local_name, prefix, document)),
47            document,
48            proto,
49            can_gc,
50        )
51    }
52
53    /// <https://html.spec.whatwg.org/multipage/#frozen-base-url>
54    pub(crate) fn frozen_base_url(&self) -> ServoUrl {
55        let href = self
56            .upcast::<Element>()
57            .get_attribute(&ns!(), &local_name!("href"))
58            .expect(
59                "The frozen base url is only defined for base elements \
60                 that have a base url.",
61            );
62        let document = self.owner_document();
63        let base = document.fallback_base_url();
64        let parsed = base.join(&href.value());
65        parsed.unwrap_or(base)
66    }
67
68    /// Update the cached base element in response to binding or unbinding from
69    /// a tree.
70    pub(crate) fn bind_unbind(&self, tree_in_doc: bool) {
71        if !tree_in_doc || self.upcast::<Node>().containing_shadow_root().is_some() {
72            return;
73        }
74
75        if self.upcast::<Element>().has_attribute(&local_name!("href")) {
76            let document = self.owner_document();
77            document.refresh_base_element();
78        }
79    }
80}
81
82impl HTMLBaseElementMethods<crate::DomTypeHolder> for HTMLBaseElement {
83    /// <https://html.spec.whatwg.org/multipage/#dom-base-href>
84    fn Href(&self) -> DOMString {
85        // Step 1.
86        let document = self.owner_document();
87
88        // Step 2.
89        let attr = self
90            .upcast::<Element>()
91            .get_attribute(&ns!(), &local_name!("href"));
92        let value = attr.as_ref().map(|attr| attr.value());
93        let url = value.as_ref().map_or("", |value| &**value);
94
95        // Step 3.
96        let url_record = document.fallback_base_url().join(url);
97
98        match url_record {
99            Err(_) => {
100                // Step 4.
101                url.into()
102            },
103            Ok(url_record) => {
104                // Step 5.
105                url_record.into_string().into()
106            },
107        }
108    }
109
110    // https://html.spec.whatwg.org/multipage/#dom-base-href
111    make_setter!(SetHref, "href");
112}
113
114impl VirtualMethods for HTMLBaseElement {
115    fn super_type(&self) -> Option<&dyn VirtualMethods> {
116        Some(self.upcast::<HTMLElement>() as &dyn VirtualMethods)
117    }
118
119    fn attribute_mutated(&self, attr: &Attr, mutation: AttributeMutation, can_gc: CanGc) {
120        self.super_type()
121            .unwrap()
122            .attribute_mutated(attr, mutation, can_gc);
123        if *attr.local_name() == local_name!("href") {
124            self.owner_document().refresh_base_element();
125        }
126    }
127
128    fn bind_to_tree(&self, context: &BindContext, can_gc: CanGc) {
129        self.super_type().unwrap().bind_to_tree(context, can_gc);
130        self.bind_unbind(context.tree_is_in_a_document_tree);
131    }
132
133    fn unbind_from_tree(&self, context: &UnbindContext, can_gc: CanGc) {
134        self.super_type().unwrap().unbind_from_tree(context, can_gc);
135        self.bind_unbind(context.tree_is_in_a_document_tree);
136    }
137}
script/dom/html/htmlbaseelement.rs

script/dom/html/
htmlbaseelement.rs
