Properly track rel keywords for <a>/<area>/<form> elements (#33462)

* Use linkrelations for all linkable elements

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>

* Document LinkRelations

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>

* Rename linkrelations.rs -> links.rs

This module is supposed to include general-purpose link
related stuff.

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>

* Parse all "rel" keywords

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>

---------

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>
This commit is contained in:
Simon Wülker 2024-09-23 13:48:53 +02:00 committed by GitHub
parent d3d6a22d27
commit a165982622
No known key found for this signature in database
GPG key ID: B5690EEEBB952194
7 changed files with 540 additions and 300 deletions

View file

@ -2,48 +2,46 @@
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
use std::cell::Cell;
use std::default::Default;
use dom_struct::dom_struct;
use html5ever::{local_name, namespace_url, ns, LocalName, Prefix};
use js::rust::HandleObject;
use net_traits::request::Referrer;
use num_traits::ToPrimitive;
use script_traits::{HistoryEntryReplacement, LoadData, LoadOrigin};
use servo_atoms::Atom;
use servo_url::ServoUrl;
use style::attr::AttrValue;
use crate::dom::activation::Activatable;
use crate::dom::attr::Attr;
use crate::dom::bindings::cell::DomRefCell;
use crate::dom::bindings::codegen::Bindings::AttrBinding::AttrMethods;
use crate::dom::bindings::codegen::Bindings::HTMLAnchorElementBinding::HTMLAnchorElementMethods;
use crate::dom::bindings::codegen::Bindings::MouseEventBinding::MouseEventMethods;
use crate::dom::bindings::codegen::Bindings::NodeBinding::NodeMethods;
use crate::dom::bindings::inheritance::Castable;
use crate::dom::bindings::refcounted::Trusted;
use crate::dom::bindings::root::{DomRoot, MutNullableDom};
use crate::dom::bindings::str::{DOMString, USVString};
use crate::dom::document::Document;
use crate::dom::domtokenlist::DOMTokenList;
use crate::dom::element::{referrer_policy_for_element, Element};
use crate::dom::element::{AttributeMutation, Element};
use crate::dom::event::Event;
use crate::dom::eventtarget::EventTarget;
use crate::dom::globalscope::GlobalScope;
use crate::dom::htmlareaelement::HTMLAreaElement;
use crate::dom::htmlelement::HTMLElement;
use crate::dom::htmlformelement::HTMLFormElement;
use crate::dom::htmlimageelement::HTMLImageElement;
use crate::dom::mouseevent::MouseEvent;
use crate::dom::node::{document_from_node, Node};
use crate::dom::node::{document_from_node, BindContext, Node};
use crate::dom::urlhelper::UrlHelper;
use crate::dom::virtualmethods::VirtualMethods;
use crate::task_source::TaskSource;
use crate::links::{follow_hyperlink, LinkRelations};
#[dom_struct]
pub struct HTMLAnchorElement {
htmlelement: HTMLElement,
rel_list: MutNullableDom<DOMTokenList>,
#[no_trace]
relations: Cell<LinkRelations>,
#[no_trace]
url: DomRefCell<Option<ServoUrl>>,
}
@ -57,6 +55,7 @@ impl HTMLAnchorElement {
HTMLAnchorElement {
htmlelement: HTMLElement::new_inherited(local_name, prefix, document),
rel_list: Default::default(),
relations: Cell::new(LinkRelations::empty()),
url: DomRefCell::new(None),
}
}
@ -121,6 +120,27 @@ impl VirtualMethods for HTMLAnchorElement {
.parse_plain_attribute(name, value),
}
}
fn attribute_mutated(&self, attr: &Attr, mutation: AttributeMutation) {
self.super_type().unwrap().attribute_mutated(attr, mutation);
match *attr.local_name() {
local_name!("rel") | local_name!("rev") => {
self.relations
.set(LinkRelations::for_element(self.upcast()));
},
_ => {},
}
}
fn bind_to_tree(&self, context: &BindContext) {
if let Some(s) = self.super_type() {
s.bind_to_tree(context);
}
self.relations
.set(LinkRelations::for_element(self.upcast()));
}
}
impl HTMLAnchorElementMethods for HTMLAnchorElement {
@ -580,153 +600,6 @@ impl Activatable for HTMLAnchorElement {
// Step 2.
//TODO: Download the link is `download` attribute is set.
follow_hyperlink(element, ismap_suffix);
follow_hyperlink(element, self.relations.get(), ismap_suffix);
}
}
/// <https://html.spec.whatwg.org/multipage/#get-an-element's-target>
pub fn get_element_target(subject: &Element) -> Option<DOMString> {
if !(subject.is::<HTMLAreaElement>() ||
subject.is::<HTMLAnchorElement>() ||
subject.is::<HTMLFormElement>())
{
return None;
}
if subject.has_attribute(&local_name!("target")) {
return Some(subject.get_string_attribute(&local_name!("target")));
}
let doc = document_from_node(subject).base_element();
match doc {
Some(doc) => {
let element = doc.upcast::<Element>();
if element.has_attribute(&local_name!("target")) {
Some(element.get_string_attribute(&local_name!("target")))
} else {
None
}
},
None => None,
}
}
/// <https://html.spec.whatwg.org/multipage/#get-an-element's-noopener>
pub fn get_element_noopener(subject: &Element, target_attribute_value: Option<DOMString>) -> bool {
if !(subject.is::<HTMLAreaElement>() ||
subject.is::<HTMLAnchorElement>() ||
subject.is::<HTMLFormElement>())
{
return false;
}
let target_is_blank = target_attribute_value
.as_ref()
.is_some_and(|target| target.to_lowercase() == "_blank");
let link_types = match subject.get_attribute(&ns!(), &local_name!("rel")) {
Some(rel) => rel.Value(),
None => return target_is_blank,
};
link_types.contains("noreferrer") ||
link_types.contains("noopener") ||
(!link_types.contains("opener") && target_is_blank)
}
/// <https://html.spec.whatwg.org/multipage/#following-hyperlinks-2>
pub fn follow_hyperlink(subject: &Element, hyperlink_suffix: Option<String>) {
// Step 1.
if subject.cannot_navigate() {
return;
}
// Step 2, done in Step 7.
let document = document_from_node(subject);
let window = document.window();
// Step 3: source browsing context.
let source = document.browsing_context().unwrap();
// Step 4-5: target attribute.
let target_attribute_value =
if subject.is::<HTMLAreaElement>() || subject.is::<HTMLAnchorElement>() {
get_element_target(subject)
} else {
None
};
// Step 6.
let noopener = get_element_noopener(subject, target_attribute_value.clone());
// Step 7.
let (maybe_chosen, replace) = match target_attribute_value {
Some(name) => {
let (maybe_chosen, new) = source.choose_browsing_context(name, noopener);
let replace = if new {
HistoryEntryReplacement::Enabled
} else {
HistoryEntryReplacement::Disabled
};
(maybe_chosen, replace)
},
None => (
Some(window.window_proxy()),
HistoryEntryReplacement::Disabled,
),
};
// Step 8.
let chosen = match maybe_chosen {
Some(proxy) => proxy,
None => return,
};
if let Some(target_document) = chosen.document() {
let target_window = target_document.window();
// Step 9, dis-owning target's opener, if necessary
// will have been done as part of Step 7 above
// in choose_browsing_context/create_auxiliary_browsing_context.
// Step 10, 11. TODO: if parsing the URL failed, navigate to error page.
let attribute = subject.get_attribute(&ns!(), &local_name!("href")).unwrap();
let mut href = attribute.Value();
// Step 11: append a hyperlink suffix.
// https://www.w3.org/Bugs/Public/show_bug.cgi?id=28925
if let Some(suffix) = hyperlink_suffix {
href.push_str(&suffix);
}
let url = match document.base_url().join(&href) {
Ok(url) => url,
Err(_) => return,
};
// Step 12.
let referrer_policy = referrer_policy_for_element(subject);
// Step 13
let referrer = match subject.get_attribute(&ns!(), &local_name!("rel")) {
Some(ref link_types) if link_types.Value().contains("noreferrer") => {
Referrer::NoReferrer
},
_ => target_window.upcast::<GlobalScope>().get_referrer(),
};
// Step 14
let pipeline_id = target_window.upcast::<GlobalScope>().pipeline_id();
let secure = target_window.upcast::<GlobalScope>().is_secure_context();
let load_data = LoadData::new(
LoadOrigin::Script(document.origin().immutable().clone()),
url,
Some(pipeline_id),
referrer,
referrer_policy,
Some(secure),
);
let target = Trusted::new(target_window);
let task = task!(navigate_follow_hyperlink: move || {
debug!("following hyperlink to {}", load_data.url);
target.root().load_url(replace, false, load_data);
});
target_window
.task_manager()
.dom_manipulation_task_source()
.queue(task, target_window.upcast())
.unwrap();
};
}