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servo/components/script/dom/element.rs
bors-servo 626c029623 Auto merge of #17385 - pyfisch:better-scroll, r=mrobinson 
Fix several bugs related to scrolling

* scrollLeft/scrollTop returned values of parent or even document root
   Only the scroll of the node itself is returned. Otherwise 0.0.
* Scrolling via script had set viewport.
   This resulted in other nodes appearing scrolled.
   Now scroll_offsets are updated with correct node id.

These bugs caused other odd behavior like both body and
document.documentElement being scrolled or the view for scrolled
elements jumping.

Also try scrolling this [example page](https://pyfisch.org/stuff/scrolltest.html) in servo with and without this change.

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<!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `__` with appropriate data: -->
- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix #17342 (github issue number if applicable).

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- [x] There are tests for these changes (partially)

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This change is [<img src="https://reviewable.io/review_button.svg" height="34" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/servo/17385)
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2017-06-23 01:50:39 -07:00

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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
//! Element nodes.
use devtools_traits::AttrInfo;
use dom::activation::Activatable;
use dom::attr::{Attr, AttrHelpersForLayout};
use dom::bindings::cell::DOMRefCell;
use dom::bindings::codegen::Bindings::AttrBinding::AttrMethods;
use dom::bindings::codegen::Bindings::DocumentBinding::DocumentMethods;
use dom::bindings::codegen::Bindings::ElementBinding;
use dom::bindings::codegen::Bindings::ElementBinding::ElementMethods;
use dom::bindings::codegen::Bindings::EventBinding::EventMethods;
use dom::bindings::codegen::Bindings::HTMLTemplateElementBinding::HTMLTemplateElementMethods;
use dom::bindings::codegen::Bindings::NodeBinding::NodeMethods;
use dom::bindings::codegen::Bindings::WindowBinding::{ScrollBehavior, ScrollToOptions};
use dom::bindings::codegen::Bindings::WindowBinding::WindowMethods;
use dom::bindings::codegen::UnionTypes::NodeOrString;
use dom::bindings::conversions::DerivedFrom;
use dom::bindings::error::{Error, ErrorResult, Fallible};
use dom::bindings::inheritance::{Castable, ElementTypeId, HTMLElementTypeId, NodeTypeId};
use dom::bindings::js::{JS, LayoutJS, MutNullableJS};
use dom::bindings::js::{Root, RootedReference};
use dom::bindings::refcounted::{Trusted, TrustedPromise};
use dom::bindings::reflector::DomObject;
use dom::bindings::str::DOMString;
use dom::bindings::xmlname::{namespace_from_domstring, validate_and_extract, xml_name_type};
use dom::bindings::xmlname::XMLName::InvalidXMLName;
use dom::characterdata::CharacterData;
use dom::create::create_element;
use dom::document::{Document, LayoutDocumentHelpers};
use dom::documentfragment::DocumentFragment;
use dom::domrect::DOMRect;
use dom::domtokenlist::DOMTokenList;
use dom::event::Event;
use dom::eventtarget::EventTarget;
use dom::htmlanchorelement::HTMLAnchorElement;
use dom::htmlbodyelement::{HTMLBodyElement, HTMLBodyElementLayoutHelpers};
use dom::htmlbuttonelement::HTMLButtonElement;
use dom::htmlcanvaselement::{HTMLCanvasElement, LayoutHTMLCanvasElementHelpers};
use dom::htmlcollection::HTMLCollection;
use dom::htmlelement::HTMLElement;
use dom::htmlfieldsetelement::HTMLFieldSetElement;
use dom::htmlfontelement::{HTMLFontElement, HTMLFontElementLayoutHelpers};
use dom::htmlformelement::FormControlElementHelpers;
use dom::htmlhrelement::{HTMLHRElement, HTMLHRLayoutHelpers};
use dom::htmliframeelement::{HTMLIFrameElement, HTMLIFrameElementLayoutMethods};
use dom::htmlimageelement::{HTMLImageElement, LayoutHTMLImageElementHelpers};
use dom::htmlinputelement::{HTMLInputElement, LayoutHTMLInputElementHelpers};
use dom::htmllabelelement::HTMLLabelElement;
use dom::htmllegendelement::HTMLLegendElement;
use dom::htmllinkelement::HTMLLinkElement;
use dom::htmlobjectelement::HTMLObjectElement;
use dom::htmloptgroupelement::HTMLOptGroupElement;
use dom::htmlselectelement::HTMLSelectElement;
use dom::htmlstyleelement::HTMLStyleElement;
use dom::htmltablecellelement::{HTMLTableCellElement, HTMLTableCellElementLayoutHelpers};
use dom::htmltableelement::{HTMLTableElement, HTMLTableElementLayoutHelpers};
use dom::htmltablerowelement::{HTMLTableRowElement, HTMLTableRowElementLayoutHelpers};
use dom::htmltablesectionelement::{HTMLTableSectionElement, HTMLTableSectionElementLayoutHelpers};
use dom::htmltemplateelement::HTMLTemplateElement;
use dom::htmltextareaelement::{HTMLTextAreaElement, LayoutHTMLTextAreaElementHelpers};
use dom::mutationobserver::{Mutation, MutationObserver};
use dom::namednodemap::NamedNodeMap;
use dom::node::{CLICK_IN_PROGRESS, ChildrenMutation, LayoutNodeHelpers, Node};
use dom::node::{NodeDamage, SEQUENTIALLY_FOCUSABLE, UnbindContext};
use dom::node::{document_from_node, window_from_node};
use dom::nodelist::NodeList;
use dom::promise::Promise;
use dom::servoparser::ServoParser;
use dom::text::Text;
use dom::validation::Validatable;
use dom::virtualmethods::{VirtualMethods, vtable_for};
use dom::window::ReflowReason;
use dom_struct::dom_struct;
use html5ever::{Prefix, LocalName, Namespace, QualName};
use html5ever::serialize;
use html5ever::serialize::SerializeOpts;
use html5ever::serialize::TraversalScope;
use html5ever::serialize::TraversalScope::{ChildrenOnly, IncludeNode};
use js::jsapi::{HandleValue, JSAutoCompartment};
use net_traits::request::CorsSettings;
use ref_filter_map::ref_filter_map;
use script_layout_interface::message::ReflowQueryType;
use script_thread::Runnable;
use selectors::attr::{AttrSelectorOperation, NamespaceConstraint, CaseSensitivity};
use selectors::matching::{ElementSelectorFlags, LocalMatchingContext, MatchingContext, MatchingMode};
use selectors::matching::{HAS_EDGE_CHILD_SELECTOR, HAS_SLOW_SELECTOR, HAS_SLOW_SELECTOR_LATER_SIBLINGS};
use selectors::matching::{RelevantLinkStatus, matches_selector_list};
use selectors::sink::Push;
use servo_atoms::Atom;
use std::ascii::AsciiExt;
use std::borrow::Cow;
use std::cell::{Cell, Ref};
use std::convert::TryFrom;
use std::default::Default;
use std::fmt;
use std::rc::Rc;
use style::CaseSensitivityExt;
use style::applicable_declarations::ApplicableDeclarationBlock;
use style::attr::{AttrValue, LengthOrPercentageOrAuto};
use style::context::{QuirksMode, ReflowGoal};
use style::element_state::*;
use style::invalidation::element::restyle_hints::RESTYLE_SELF;
use style::properties::{Importance, PropertyDeclaration, PropertyDeclarationBlock, parse_style_attribute};
use style::properties::longhands::{self, background_image, border_spacing, font_family, font_size, overflow_x};
use style::rule_tree::CascadeLevel;
use style::selector_parser::{NonTSPseudoClass, PseudoElement, RestyleDamage, SelectorImpl, SelectorParser};
use style::selector_parser::extended_filtering;
use style::shared_lock::{SharedRwLock, Locked};
use style::stylearc::Arc;
use style::thread_state;
use style::values::{CSSFloat, Either};
use style::values::specified;
use stylesheet_loader::StylesheetOwner;
// TODO: Update focus state when the top-level browsing context gains or loses system focus,
// and when the element enters or leaves a browsing context container.
// https://html.spec.whatwg.org/multipage/#selector-focus
#[dom_struct]
pub struct Element {
node: Node,
local_name: LocalName,
tag_name: TagName,
namespace: Namespace,
prefix: Option<Prefix>,
attrs: DOMRefCell<Vec<JS<Attr>>>,
id_attribute: DOMRefCell<Option<Atom>>,
#[ignore_heap_size_of = "Arc"]
style_attribute: DOMRefCell<Option<Arc<Locked<PropertyDeclarationBlock>>>>,
attr_list: MutNullableJS<NamedNodeMap>,
class_list: MutNullableJS<DOMTokenList>,
state: Cell<ElementState>,
/// These flags are set by the style system to indicate the that certain
/// operations may require restyling this element or its descendants. The
/// flags are not atomic, so the style system takes care of only set them
/// when it has exclusive access to the element.
#[ignore_heap_size_of = "bitflags defined in rust-selectors"]
selector_flags: Cell<ElementSelectorFlags>,
}
impl fmt::Debug for Element {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "<{}", self.local_name)?;
if let Some(ref id) = *self.id_attribute.borrow() {
write!(f, " id={}", id)?;
}
write!(f, ">")
}
}
impl fmt::Debug for Root<Element> {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
(**self).fmt(f)
}
}
#[derive(PartialEq, HeapSizeOf)]
pub enum ElementCreator {
ParserCreated(u64),
ScriptCreated,
}
impl ElementCreator {
pub fn is_parser_created(&self) -> bool {
match *self {
ElementCreator::ParserCreated(_) => true,
ElementCreator::ScriptCreated => false,
}
}
pub fn return_line_number(&self) -> u64 {
match *self {
ElementCreator::ParserCreated(l) => l,
ElementCreator::ScriptCreated => 1,
}
}
}
pub enum AdjacentPosition {
BeforeBegin,
AfterEnd,
AfterBegin,
BeforeEnd,
}
impl<'a> TryFrom<&'a str> for AdjacentPosition {
type Error = Error;
fn try_from(position: &'a str) -> Result<AdjacentPosition, Self::Error> {
match_ignore_ascii_case! { &*position,
"beforebegin" => Ok(AdjacentPosition::BeforeBegin),
"afterbegin" => Ok(AdjacentPosition::AfterBegin),
"beforeend" => Ok(AdjacentPosition::BeforeEnd),
"afterend" => Ok(AdjacentPosition::AfterEnd),
_ => Err(Error::Syntax)
}
}
}
//
// Element methods
//
impl Element {
pub fn create(name: QualName,
document: &Document, creator: ElementCreator)
-> Root<Element> {
create_element(name, document, creator)
}
pub fn new_inherited(local_name: LocalName,
namespace: Namespace, prefix: Option<Prefix>,
document: &Document) -> Element {
Element::new_inherited_with_state(ElementState::empty(), local_name,
namespace, prefix, document)
}
pub fn new_inherited_with_state(state: ElementState, local_name: LocalName,
namespace: Namespace, prefix: Option<Prefix>,
document: &Document)
-> Element {
Element {
node: Node::new_inherited(document),
local_name: local_name,
tag_name: TagName::new(),
namespace: namespace,
prefix: prefix,
attrs: DOMRefCell::new(vec![]),
id_attribute: DOMRefCell::new(None),
style_attribute: DOMRefCell::new(None),
attr_list: Default::default(),
class_list: Default::default(),
state: Cell::new(state),
selector_flags: Cell::new(ElementSelectorFlags::empty()),
}
}
pub fn new(local_name: LocalName,
namespace: Namespace,
prefix: Option<Prefix>,
document: &Document) -> Root<Element> {
Node::reflect_node(
box Element::new_inherited(local_name, namespace, prefix, document),
document,
ElementBinding::Wrap)
}
pub fn restyle(&self, damage: NodeDamage) {
let doc = self.node.owner_doc();
let mut restyle = doc.ensure_pending_restyle(self);
// FIXME(bholley): I think we should probably only do this for
// NodeStyleDamaged, but I'm preserving existing behavior.
restyle.hint.insert(RESTYLE_SELF);
if damage == NodeDamage::OtherNodeDamage {
restyle.damage = RestyleDamage::rebuild_and_reflow();
}
}
// https://drafts.csswg.org/cssom-view/#css-layout-box
// Elements that have a computed value of the display property
// that is table-column or table-column-group
// FIXME: Currently, it is assumed to be true always
fn has_css_layout_box(&self) -> bool {
true
}
// https://drafts.csswg.org/cssom-view/#potentially-scrollable
fn potentially_scrollable(&self) -> bool {
self.has_css_layout_box() &&
!self.overflow_x_is_visible() &&
!self.overflow_y_is_visible()
}
// used value of overflow-x is "visible"
fn overflow_x_is_visible(&self) -> bool {
let window = window_from_node(self);
let overflow_pair = window.overflow_query(self.upcast::<Node>().to_trusted_node_address());
overflow_pair.x == overflow_x::computed_value::T::visible
}
// used value of overflow-y is "visible"
fn overflow_y_is_visible(&self) -> bool {
let window = window_from_node(self);
let overflow_pair = window.overflow_query(self.upcast::<Node>().to_trusted_node_address());
overflow_pair.y != overflow_x::computed_value::T::visible
}
}
#[allow(unsafe_code)]
pub trait RawLayoutElementHelpers {
unsafe fn get_attr_for_layout<'a>(&'a self, namespace: &Namespace, name: &LocalName)
-> Option<&'a AttrValue>;
unsafe fn get_attr_val_for_layout<'a>(&'a self, namespace: &Namespace, name: &LocalName)
-> Option<&'a str>;
unsafe fn get_attr_vals_for_layout<'a>(&'a self, name: &LocalName) -> Vec<&'a AttrValue>;
}
#[inline]
#[allow(unsafe_code)]
pub unsafe fn get_attr_for_layout<'a>(elem: &'a Element, namespace: &Namespace, name: &LocalName)
-> Option<LayoutJS<Attr>> {
// cast to point to T in RefCell<T> directly
let attrs = elem.attrs.borrow_for_layout();
attrs.iter().find(|attr| {
let attr = attr.to_layout();
*name == attr.local_name_atom_forever() &&
(*attr.unsafe_get()).namespace() == namespace
}).map(|attr| attr.to_layout())
}
#[allow(unsafe_code)]
impl RawLayoutElementHelpers for Element {
#[inline]
unsafe fn get_attr_for_layout<'a>(&'a self, namespace: &Namespace, name: &LocalName)
-> Option<&'a AttrValue> {
get_attr_for_layout(self, namespace, name).map(|attr| {
attr.value_forever()
})
}
#[inline]
unsafe fn get_attr_val_for_layout<'a>(&'a self, namespace: &Namespace, name: &LocalName)
-> Option<&'a str> {
get_attr_for_layout(self, namespace, name).map(|attr| {
attr.value_ref_forever()
})
}
#[inline]
unsafe fn get_attr_vals_for_layout<'a>(&'a self, name: &LocalName) -> Vec<&'a AttrValue> {
let attrs = self.attrs.borrow_for_layout();
attrs.iter().filter_map(|attr| {
let attr = attr.to_layout();
if *name == attr.local_name_atom_forever() {
Some(attr.value_forever())
} else {
None
}
}).collect()
}
}
pub trait LayoutElementHelpers {
#[allow(unsafe_code)]
unsafe fn has_class_for_layout(&self, name: &Atom, case_sensitivity: CaseSensitivity) -> bool;
#[allow(unsafe_code)]
unsafe fn get_classes_for_layout(&self) -> Option<&'static [Atom]>;
#[allow(unsafe_code)]
unsafe fn synthesize_presentational_hints_for_legacy_attributes<V>(&self, &mut V)
where V: Push<ApplicableDeclarationBlock>;
#[allow(unsafe_code)]
unsafe fn get_colspan(self) -> u32;
#[allow(unsafe_code)]
unsafe fn get_rowspan(self) -> u32;
#[allow(unsafe_code)]
unsafe fn html_element_in_html_document_for_layout(&self) -> bool;
fn id_attribute(&self) -> *const Option<Atom>;
fn style_attribute(&self) -> *const Option<Arc<Locked<PropertyDeclarationBlock>>>;
fn local_name(&self) -> &LocalName;
fn namespace(&self) -> &Namespace;
fn get_lang_for_layout(&self) -> String;
fn get_checked_state_for_layout(&self) -> bool;
fn get_indeterminate_state_for_layout(&self) -> bool;
fn get_state_for_layout(&self) -> ElementState;
fn insert_selector_flags(&self, flags: ElementSelectorFlags);
fn has_selector_flags(&self, flags: ElementSelectorFlags) -> bool;
}
impl LayoutElementHelpers for LayoutJS<Element> {
#[allow(unsafe_code)]
#[inline]
unsafe fn has_class_for_layout(&self, name: &Atom, case_sensitivity: CaseSensitivity) -> bool {
get_attr_for_layout(&*self.unsafe_get(), &ns!(), &local_name!("class")).map_or(false, |attr| {
attr.value_tokens_forever().unwrap().iter().any(|atom| case_sensitivity.eq_atom(atom, name))
})
}
#[allow(unsafe_code)]
#[inline]
unsafe fn get_classes_for_layout(&self) -> Option<&'static [Atom]> {
get_attr_for_layout(&*self.unsafe_get(), &ns!(), &local_name!("class"))
.map(|attr| attr.value_tokens_forever().unwrap())
}
#[allow(unsafe_code)]
unsafe fn synthesize_presentational_hints_for_legacy_attributes<V>(&self, hints: &mut V)
where V: Push<ApplicableDeclarationBlock>
{
// FIXME(emilio): Just a single PDB should be enough.
#[inline]
fn from_declaration(shared_lock: &SharedRwLock, declaration: PropertyDeclaration)
-> ApplicableDeclarationBlock {
ApplicableDeclarationBlock::from_declarations(
Arc::new(shared_lock.wrap(PropertyDeclarationBlock::with_one(
declaration, Importance::Normal
))),
CascadeLevel::PresHints)
}
let document = self.upcast::<Node>().owner_doc_for_layout();
let shared_lock = document.style_shared_lock();
let bgcolor = if let Some(this) = self.downcast::<HTMLBodyElement>() {
this.get_background_color()
} else if let Some(this) = self.downcast::<HTMLTableElement>() {
this.get_background_color()
} else if let Some(this) = self.downcast::<HTMLTableCellElement>() {
this.get_background_color()
} else if let Some(this) = self.downcast::<HTMLTableRowElement>() {
this.get_background_color()
} else if let Some(this) = self.downcast::<HTMLTableSectionElement>() {
this.get_background_color()
} else {
None
};
if let Some(color) = bgcolor {
hints.push(from_declaration(
shared_lock,
PropertyDeclaration::BackgroundColor(color.into())
));
}
let background = if let Some(this) = self.downcast::<HTMLBodyElement>() {
this.get_background()
} else {
None
};
if let Some(url) = background {
hints.push(from_declaration(
shared_lock,
PropertyDeclaration::BackgroundImage(
background_image::SpecifiedValue(vec![
Either::Second(specified::Image::for_cascade(url.into()))
]))));
}
let color = if let Some(this) = self.downcast::<HTMLFontElement>() {
this.get_color()
} else if let Some(this) = self.downcast::<HTMLBodyElement>() {
// https://html.spec.whatwg.org/multipage/#the-page:the-body-element-20
this.get_color()
} else if let Some(this) = self.downcast::<HTMLHRElement>() {
// https://html.spec.whatwg.org/multipage/#the-hr-element-2:presentational-hints-5
this.get_color()
} else {
None
};
if let Some(color) = color {
hints.push(from_declaration(
shared_lock,
PropertyDeclaration::Color(
longhands::color::SpecifiedValue(color.into())
)
));
}
let font_family = if let Some(this) = self.downcast::<HTMLFontElement>() {
this.get_face()
} else {
None
};
if let Some(font_family) = font_family {
hints.push(from_declaration(
shared_lock,
PropertyDeclaration::FontFamily(
font_family::SpecifiedValue::Values(vec![
font_family::computed_value::FontFamily::from_atom(
font_family)]))));
}
let font_size = self.downcast::<HTMLFontElement>().and_then(|this| this.get_size());
if let Some(font_size) = font_size {
hints.push(from_declaration(
shared_lock,
PropertyDeclaration::FontSize(
font_size::SpecifiedValue::from_html_size(font_size as u8)
)
))
}
let cellspacing = if let Some(this) = self.downcast::<HTMLTableElement>() {
this.get_cellspacing()
} else {
None
};
if let Some(cellspacing) = cellspacing {
let width_value = specified::Length::from_px(cellspacing as f32);
hints.push(from_declaration(
shared_lock,
PropertyDeclaration::BorderSpacing(
Box::new(border_spacing::SpecifiedValue {
horizontal: width_value,
vertical: None,
}))));
}
let size = if let Some(this) = self.downcast::<HTMLInputElement>() {
// FIXME(pcwalton): More use of atoms, please!
match (*self.unsafe_get()).get_attr_val_for_layout(&ns!(), &local_name!("type")) {
// Not text entry widget
Some("hidden") | Some("date") | Some("month") | Some("week") |
Some("time") | Some("datetime-local") | Some("number") | Some("range") |
Some("color") | Some("checkbox") | Some("radio") | Some("file") |
Some("submit") | Some("image") | Some("reset") | Some("button") => {
None
},
// Others
_ => {
match this.size_for_layout() {
0 => None,
s => Some(s as i32),
}
},
}
} else {
None
};
if let Some(size) = size {
let value = specified::NoCalcLength::ServoCharacterWidth(specified::CharacterWidth(size));
hints.push(from_declaration(
shared_lock,
PropertyDeclaration::Width(
specified::LengthOrPercentageOrAuto::Length(value))));
}
let width = if let Some(this) = self.downcast::<HTMLIFrameElement>() {
this.get_width()
} else if let Some(this) = self.downcast::<HTMLImageElement>() {
this.get_width()
} else if let Some(this) = self.downcast::<HTMLTableElement>() {
this.get_width()
} else if let Some(this) = self.downcast::<HTMLTableCellElement>() {
this.get_width()
} else if let Some(this) = self.downcast::<HTMLHRElement>() {
// https://html.spec.whatwg.org/multipage/#the-hr-element-2:attr-hr-width
this.get_width()
} else if let Some(this) = self.downcast::<HTMLCanvasElement>() {
this.get_width()
} else {
LengthOrPercentageOrAuto::Auto
};
// FIXME(emilio): Use from_computed value here and below.
match width {
LengthOrPercentageOrAuto::Auto => {}
LengthOrPercentageOrAuto::Percentage(percentage) => {
let width_value =
specified::LengthOrPercentageOrAuto::Percentage(specified::Percentage(percentage));
hints.push(from_declaration(
shared_lock,
PropertyDeclaration::Width(width_value)));
}
LengthOrPercentageOrAuto::Length(length) => {
let width_value = specified::LengthOrPercentageOrAuto::Length(
specified::NoCalcLength::Absolute(specified::AbsoluteLength::Px(length.to_f32_px())));
hints.push(from_declaration(
shared_lock,
PropertyDeclaration::Width(width_value)));
}
}
let height = if let Some(this) = self.downcast::<HTMLIFrameElement>() {
this.get_height()
} else if let Some(this) = self.downcast::<HTMLImageElement>() {
this.get_height()
} else if let Some(this) = self.downcast::<HTMLCanvasElement>() {
this.get_height()
} else {
LengthOrPercentageOrAuto::Auto
};
match height {
LengthOrPercentageOrAuto::Auto => {}
LengthOrPercentageOrAuto::Percentage(percentage) => {
let height_value =
specified::LengthOrPercentageOrAuto::Percentage(specified::Percentage(percentage));
hints.push(from_declaration(
shared_lock,
PropertyDeclaration::Height(height_value)));
}
LengthOrPercentageOrAuto::Length(length) => {
let height_value = specified::LengthOrPercentageOrAuto::Length(
specified::NoCalcLength::Absolute(specified::AbsoluteLength::Px(length.to_f32_px())));
hints.push(from_declaration(
shared_lock,
PropertyDeclaration::Height(height_value)));
}
}
let cols = if let Some(this) = self.downcast::<HTMLTextAreaElement>() {
match this.get_cols() {
0 => None,
c => Some(c as i32),
}
} else {
None
};
if let Some(cols) = cols {
// TODO(mttr) ServoCharacterWidth uses the size math for <input type="text">, but
// the math for <textarea> is a little different since we need to take
// scrollbar size into consideration (but we don't have a scrollbar yet!)
//
// https://html.spec.whatwg.org/multipage/#textarea-effective-width
let value = specified::NoCalcLength::ServoCharacterWidth(specified::CharacterWidth(cols));
hints.push(from_declaration(
shared_lock,
PropertyDeclaration::Width(specified::LengthOrPercentageOrAuto::Length(value))));
}
let rows = if let Some(this) = self.downcast::<HTMLTextAreaElement>() {
match this.get_rows() {
0 => None,
r => Some(r as i32),
}
} else {
None
};
if let Some(rows) = rows {
// TODO(mttr) This should take scrollbar size into consideration.
//
// https://html.spec.whatwg.org/multipage/#textarea-effective-height
let value = specified::NoCalcLength::FontRelative(specified::FontRelativeLength::Em(rows as CSSFloat));
hints.push(from_declaration(
shared_lock,
PropertyDeclaration::Height(specified::LengthOrPercentageOrAuto::Length(value))));
}
let border = if let Some(this) = self.downcast::<HTMLTableElement>() {
this.get_border()
} else {
None
};
if let Some(border) = border {
let width_value = specified::BorderSideWidth::Length(specified::Length::from_px(border as f32));
hints.push(from_declaration(
shared_lock,
PropertyDeclaration::BorderTopWidth(width_value.clone())));
hints.push(from_declaration(
shared_lock,
PropertyDeclaration::BorderLeftWidth(width_value.clone())));
hints.push(from_declaration(
shared_lock,
PropertyDeclaration::BorderBottomWidth(width_value.clone())));
hints.push(from_declaration(
shared_lock,
PropertyDeclaration::BorderRightWidth(width_value)));
}
}
#[allow(unsafe_code)]
unsafe fn get_colspan(self) -> u32 {
if let Some(this) = self.downcast::<HTMLTableCellElement>() {
this.get_colspan().unwrap_or(1)
} else {
// Don't panic since `display` can cause this to be called on arbitrary
// elements.
1
}
}
#[allow(unsafe_code)]
unsafe fn get_rowspan(self) -> u32 {
if let Some(this) = self.downcast::<HTMLTableCellElement>() {
this.get_rowspan().unwrap_or(1)
} else {
// Don't panic since `display` can cause this to be called on arbitrary
// elements.
1
}
}
#[inline]
#[allow(unsafe_code)]
unsafe fn html_element_in_html_document_for_layout(&self) -> bool {
if (*self.unsafe_get()).namespace != ns!(html) {
return false;
}
self.upcast::<Node>().owner_doc_for_layout().is_html_document_for_layout()
}
#[allow(unsafe_code)]
fn id_attribute(&self) -> *const Option<Atom> {
unsafe {
(*self.unsafe_get()).id_attribute.borrow_for_layout()
}
}
#[allow(unsafe_code)]
fn style_attribute(&self) -> *const Option<Arc<Locked<PropertyDeclarationBlock>>> {
unsafe {
(*self.unsafe_get()).style_attribute.borrow_for_layout()
}
}
#[allow(unsafe_code)]
fn local_name(&self) -> &LocalName {
unsafe {
&(*self.unsafe_get()).local_name
}
}
#[allow(unsafe_code)]
fn namespace(&self) -> &Namespace {
unsafe {
&(*self.unsafe_get()).namespace
}
}
#[allow(unsafe_code)]
fn get_lang_for_layout(&self) -> String {
unsafe {
let mut current_node = Some(self.upcast::<Node>());
while let Some(node) = current_node {
current_node = node.parent_node_ref();
match node.downcast::<Element>().map(|el| el.unsafe_get()) {
Some(elem) => {
if let Some(attr) = (*elem).get_attr_val_for_layout(&ns!(xml), &local_name!("lang")) {
return attr.to_owned();
}
if let Some(attr) = (*elem).get_attr_val_for_layout(&ns!(), &local_name!("lang")) {
return attr.to_owned();
}
}
None => continue
}
}
// TODO: Check meta tags for a pragma-set default language
// TODO: Check HTTP Content-Language header
String::new()
}
}
#[inline]
#[allow(unsafe_code)]
fn get_checked_state_for_layout(&self) -> bool {
// TODO option and menuitem can also have a checked state.
match self.downcast::<HTMLInputElement>() {
Some(input) => unsafe {
input.checked_state_for_layout()
},
None => false,
}
}
#[inline]
#[allow(unsafe_code)]
fn get_indeterminate_state_for_layout(&self) -> bool {
// TODO progress elements can also be matched with :indeterminate
match self.downcast::<HTMLInputElement>() {
Some(input) => unsafe {
input.indeterminate_state_for_layout()
},
None => false,
}
}
#[inline]
#[allow(unsafe_code)]
fn get_state_for_layout(&self) -> ElementState {
unsafe {
(*self.unsafe_get()).state.get()
}
}
#[inline]
#[allow(unsafe_code)]
fn insert_selector_flags(&self, flags: ElementSelectorFlags) {
debug_assert!(thread_state::get().is_layout());
unsafe {
let f = &(*self.unsafe_get()).selector_flags;
f.set(f.get() | flags);
}
}
#[inline]
#[allow(unsafe_code)]
fn has_selector_flags(&self, flags: ElementSelectorFlags) -> bool {
unsafe {
(*self.unsafe_get()).selector_flags.get().contains(flags)
}
}
}
impl Element {
pub fn html_element_in_html_document(&self) -> bool {
self.namespace == ns!(html) && self.upcast::<Node>().is_in_html_doc()
}
pub fn local_name(&self) -> &LocalName {
&self.local_name
}
pub fn parsed_name(&self, mut name: DOMString) -> LocalName {
if self.html_element_in_html_document() {
name.make_ascii_lowercase();
}
LocalName::from(name)
}
pub fn namespace(&self) -> &Namespace {
&self.namespace
}
pub fn prefix(&self) -> Option<&Prefix> {
self.prefix.as_ref()
}
pub fn attrs(&self) -> Ref<[JS<Attr>]> {
Ref::map(self.attrs.borrow(), |attrs| &**attrs)
}
// Element branch of https://dom.spec.whatwg.org/#locate-a-namespace
pub fn locate_namespace(&self, prefix: Option<DOMString>) -> Namespace {
let prefix = prefix.map(String::from).map(LocalName::from);
let inclusive_ancestor_elements =
self.upcast::<Node>()
.inclusive_ancestors()
.filter_map(Root::downcast::<Self>);
// Steps 3-4.
for element in inclusive_ancestor_elements {
// Step 1.
if element.namespace() != &ns!() && element.prefix().map(|p| &**p) == prefix.as_ref().map(|p| &**p) {
return element.namespace().clone();
}
// Step 2.
let attr = ref_filter_map(self.attrs(), |attrs| {
attrs.iter().find(|attr| {
if attr.namespace() != &ns!(xmlns) {
return false;
}
match (attr.prefix(), prefix.as_ref()) {
(Some(&namespace_prefix!("xmlns")), Some(prefix)) => {
attr.local_name() == prefix
},
(None, None) => attr.local_name() == &local_name!("xmlns"),
_ => false,
}
})
});
if let Some(attr) = attr {
return (**attr.value()).into();
}
}
ns!()
}
pub fn style_attribute(&self) -> &DOMRefCell<Option<Arc<Locked<PropertyDeclarationBlock>>>> {
&self.style_attribute
}
pub fn summarize(&self) -> Vec<AttrInfo> {
self.attrs.borrow().iter()
.map(|attr| attr.summarize())
.collect()
}
pub fn is_void(&self) -> bool {
if self.namespace != ns!(html) {
return false
}
match self.local_name {
/* List of void elements from
https://html.spec.whatwg.org/multipage/#html-fragment-serialisation-algorithm */
local_name!("area") | local_name!("base") | local_name!("basefont") |
local_name!("bgsound") | local_name!("br") |
local_name!("col") | local_name!("embed") | local_name!("frame") |
local_name!("hr") | local_name!("img") |
local_name!("input") | local_name!("keygen") | local_name!("link") |
local_name!("menuitem") | local_name!("meta") |
local_name!("param") | local_name!("source") | local_name!("track") |
local_name!("wbr") => true,
_ => false
}
}
pub fn serialize(&self, traversal_scope: TraversalScope) -> Fallible<DOMString> {
let mut writer = vec![];
match serialize(&mut writer,
&self.upcast::<Node>(),
SerializeOpts {
traversal_scope: traversal_scope,
..Default::default()
}) {
// FIXME(ajeffrey): Directly convert UTF8 to DOMString
Ok(()) => Ok(DOMString::from(String::from_utf8(writer).unwrap())),
Err(_) => panic!("Cannot serialize element"),
}
}
pub fn root_element(&self) -> Root<Element> {
if self.node.is_in_doc() {
self.upcast::<Node>()
.owner_doc()
.GetDocumentElement()
.unwrap()
} else {
self.upcast::<Node>()
.inclusive_ancestors()
.filter_map(Root::downcast)
.last()
.expect("We know inclusive_ancestors will return `self` which is an element")
}
}
// https://dom.spec.whatwg.org/#locate-a-namespace-prefix
pub fn lookup_prefix(&self, namespace: Namespace) -> Option<DOMString> {
for node in self.upcast::<Node>().inclusive_ancestors() {
match node.downcast::<Element>() {
Some(element) => {
// Step 1.
if *element.namespace() == namespace {
if let Some(prefix) = element.GetPrefix() {
return Some(prefix);
}
}
// Step 2.
for attr in element.attrs.borrow().iter() {
if attr.prefix() == Some(&namespace_prefix!("xmlns")) &&
**attr.value() == *namespace {
return Some(attr.LocalName());
}
}
},
None => return None,
}
}
None
}
pub fn is_focusable_area(&self) -> bool {
if self.is_actually_disabled() {
return false;
}
// TODO: Check whether the element is being rendered (i.e. not hidden).
let node = self.upcast::<Node>();
if node.get_flag(SEQUENTIALLY_FOCUSABLE) {
return true;
}
// https://html.spec.whatwg.org/multipage/#specially-focusable
match node.type_id() {
NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLAnchorElement)) |
NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLInputElement)) |
NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLSelectElement)) |
NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLTextAreaElement)) => {
true
}
_ => false,
}
}
pub fn is_actually_disabled(&self) -> bool {
let node = self.upcast::<Node>();
match node.type_id() {
NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLButtonElement)) |
NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLInputElement)) |
NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLSelectElement)) |
NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLTextAreaElement)) |
NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLOptionElement)) => {
self.disabled_state()
}
// TODO:
// an optgroup element that has a disabled attribute
// a menuitem element that has a disabled attribute
// a fieldset element that is a disabled fieldset
_ => false,
}
}
pub fn push_new_attribute(&self,
local_name: LocalName,
value: AttrValue,
name: LocalName,
namespace: Namespace,
prefix: Option<Prefix>) {
let window = window_from_node(self);
let attr = Attr::new(&window,
local_name,
value,
name,
namespace,
prefix,
Some(self));
self.push_attribute(&attr);
}
pub fn push_attribute(&self, attr: &Attr) {
let name = attr.local_name().clone();
let namespace = attr.namespace().clone();
let old_value = DOMString::from(&**attr.value());
let mutation = Mutation::Attribute { name, namespace, old_value };
MutationObserver::queue_a_mutation_record(&self.node, mutation);
assert!(attr.GetOwnerElement().r() == Some(self));
self.will_mutate_attr(attr);
self.attrs.borrow_mut().push(JS::from_ref(attr));
if attr.namespace() == &ns!() {
vtable_for(self.upcast()).attribute_mutated(attr, AttributeMutation::Set(None));
}
}
pub fn get_attribute(&self, namespace: &Namespace, local_name: &LocalName) -> Option<Root<Attr>> {
self.attrs
.borrow()
.iter()
.find(|attr| attr.local_name() == local_name && attr.namespace() == namespace)
.map(|js| Root::from_ref(&**js))
}
// https://dom.spec.whatwg.org/#concept-element-attributes-get-by-name
pub fn get_attribute_by_name(&self, name: DOMString) -> Option<Root<Attr>> {
let name = &self.parsed_name(name);
self.attrs.borrow().iter().find(|a| a.name() == name).map(|js| Root::from_ref(&**js))
}
pub fn set_attribute_from_parser(&self,
qname: QualName,
value: DOMString,
prefix: Option<Prefix>) {
// Don't set if the attribute already exists, so we can handle add_attrs_if_missing
if self.attrs
.borrow()
.iter()
.any(|a| *a.local_name() == qname.local && *a.namespace() == qname.ns) {
return;
}
let name = match prefix {
None => qname.local.clone(),
Some(ref prefix) => {
let name = format!("{}:{}", &**prefix, &*qname.local);
LocalName::from(name)
},
};
let value = self.parse_attribute(&qname.ns, &qname.local, value);
self.push_new_attribute(qname.local, value, name, qname.ns, prefix);
}
pub fn set_attribute(&self, name: &LocalName, value: AttrValue) {
assert!(name == &name.to_ascii_lowercase());
assert!(!name.contains(":"));
self.set_first_matching_attribute(name.clone(),
value,
name.clone(),
ns!(),
None,
|attr| attr.local_name() == name);
}
// https://html.spec.whatwg.org/multipage/#attr-data-*
pub fn set_custom_attribute(&self, name: DOMString, value: DOMString) -> ErrorResult {
// Step 1.
if let InvalidXMLName = xml_name_type(&name) {
return Err(Error::InvalidCharacter);
}
// Steps 2-5.
let name = LocalName::from(name);
let value = self.parse_attribute(&ns!(), &name, value);
self.set_first_matching_attribute(name.clone(),
value,
name.clone(),
ns!(),
None,
|attr| {
*attr.name() == name && *attr.namespace() == ns!()
});
Ok(())
}
fn set_first_matching_attribute<F>(&self,
local_name: LocalName,
value: AttrValue,
name: LocalName,
namespace: Namespace,
prefix: Option<Prefix>,
find: F)
where F: Fn(&Attr) -> bool
{
let attr = self.attrs
.borrow()
.iter()
.find(|attr| find(&attr))
.map(|js| Root::from_ref(&**js));
if let Some(attr) = attr {
attr.set_value(value, self);
} else {
self.push_new_attribute(local_name, value, name, namespace, prefix);
};
}
pub fn parse_attribute(&self,
namespace: &Namespace,
local_name: &LocalName,
value: DOMString)
-> AttrValue {
if *namespace == ns!() {
vtable_for(self.upcast()).parse_plain_attribute(local_name, value)
} else {
AttrValue::String(value.into())
}
}
pub fn remove_attribute(&self, namespace: &Namespace, local_name: &LocalName) -> Option<Root<Attr>> {
self.remove_first_matching_attribute(|attr| {
attr.namespace() == namespace && attr.local_name() == local_name
})
}
pub fn remove_attribute_by_name(&self, name: &LocalName) -> Option<Root<Attr>> {
self.remove_first_matching_attribute(|attr| attr.name() == name)
}
fn remove_first_matching_attribute<F>(&self, find: F) -> Option<Root<Attr>>
where F: Fn(&Attr) -> bool {
let idx = self.attrs.borrow().iter().position(|attr| find(&attr));
idx.map(|idx| {
let attr = Root::from_ref(&*(*self.attrs.borrow())[idx]);
self.will_mutate_attr(&attr);
let name = attr.local_name().clone();
let namespace = attr.namespace().clone();
let old_value = DOMString::from(&**attr.value());
let mutation = Mutation::Attribute { name, namespace, old_value, };
MutationObserver::queue_a_mutation_record(&self.node, mutation);
self.attrs.borrow_mut().remove(idx);
attr.set_owner(None);
if attr.namespace() == &ns!() {
vtable_for(self.upcast()).attribute_mutated(&attr, AttributeMutation::Removed);
}
attr
})
}
pub fn has_class(&self, name: &Atom, case_sensitivity: CaseSensitivity) -> bool {
self.get_attribute(&ns!(), &local_name!("class")).map_or(false, |attr| {
attr.value().as_tokens().iter().any(|atom| case_sensitivity.eq_atom(name, atom))
})
}
pub fn set_atomic_attribute(&self, local_name: &LocalName, value: DOMString) {
assert!(*local_name == local_name.to_ascii_lowercase());
let value = AttrValue::from_atomic(value.into());
self.set_attribute(local_name, value);
}
pub fn has_attribute(&self, local_name: &LocalName) -> bool {
assert!(local_name.bytes().all(|b| b.to_ascii_lowercase() == b));
self.attrs
.borrow()
.iter()
.any(|attr| attr.local_name() == local_name && attr.namespace() == &ns!())
}
pub fn set_bool_attribute(&self, local_name: &LocalName, value: bool) {
if self.has_attribute(local_name) == value {
return;
}
if value {
self.set_string_attribute(local_name, DOMString::new());
} else {
self.remove_attribute(&ns!(), local_name);
}
}
pub fn get_url_attribute(&self, local_name: &LocalName) -> DOMString {
assert!(*local_name == local_name.to_ascii_lowercase());
if !self.has_attribute(local_name) {
return DOMString::new();
}
let url = self.get_string_attribute(local_name);
let doc = document_from_node(self);
let base = doc.base_url();
// https://html.spec.whatwg.org/multipage/#reflect
// XXXManishearth this doesn't handle `javascript:` urls properly
match base.join(&url) {
Ok(parsed) => DOMString::from(parsed.into_string()),
Err(_) => DOMString::from(""),
}
}
pub fn set_url_attribute(&self, local_name: &LocalName, value: DOMString) {
self.set_string_attribute(local_name, value);
}
pub fn get_string_attribute(&self, local_name: &LocalName) -> DOMString {
match self.get_attribute(&ns!(), local_name) {
Some(x) => x.Value(),
None => DOMString::new(),
}
}
pub fn set_string_attribute(&self, local_name: &LocalName, value: DOMString) {
assert!(*local_name == local_name.to_ascii_lowercase());
self.set_attribute(local_name, AttrValue::String(value.into()));
}
pub fn get_tokenlist_attribute(&self, local_name: &LocalName) -> Vec<Atom> {
self.get_attribute(&ns!(), local_name).map(|attr| {
attr.value()
.as_tokens()
.to_vec()
}).unwrap_or(vec!())
}
pub fn set_tokenlist_attribute(&self, local_name: &LocalName, value: DOMString) {
assert!(*local_name == local_name.to_ascii_lowercase());
self.set_attribute(local_name,
AttrValue::from_serialized_tokenlist(value.into()));
}
pub fn set_atomic_tokenlist_attribute(&self, local_name: &LocalName, tokens: Vec<Atom>) {
assert!(*local_name == local_name.to_ascii_lowercase());
self.set_attribute(local_name, AttrValue::from_atomic_tokens(tokens));
}
pub fn get_int_attribute(&self, local_name: &LocalName, default: i32) -> i32 {
// TODO: Is this assert necessary?
assert!(local_name.chars().all(|ch| {
!ch.is_ascii() || ch.to_ascii_lowercase() == ch
}));
let attribute = self.get_attribute(&ns!(), local_name);
match attribute {
Some(ref attribute) => {
match *attribute.value() {
AttrValue::Int(_, value) => value,
_ => panic!("Expected an AttrValue::Int: \
implement parse_plain_attribute"),
}
}
None => default,
}
}
pub fn set_int_attribute(&self, local_name: &LocalName, value: i32) {
assert!(*local_name == local_name.to_ascii_lowercase());
self.set_attribute(local_name, AttrValue::Int(value.to_string(), value));
}
pub fn get_uint_attribute(&self, local_name: &LocalName, default: u32) -> u32 {
assert!(local_name.chars().all(|ch| !ch.is_ascii() || ch.to_ascii_lowercase() == ch));
let attribute = self.get_attribute(&ns!(), local_name);
match attribute {
Some(ref attribute) => {
match *attribute.value() {
AttrValue::UInt(_, value) => value,
_ => panic!("Expected an AttrValue::UInt: implement parse_plain_attribute"),
}
}
None => default,
}
}
pub fn set_uint_attribute(&self, local_name: &LocalName, value: u32) {
assert!(*local_name == local_name.to_ascii_lowercase());
self.set_attribute(local_name, AttrValue::UInt(value.to_string(), value));
}
pub fn will_mutate_attr(&self, attr: &Attr) {
let node = self.upcast::<Node>();
node.owner_doc().element_attr_will_change(self, attr);
}
// https://dom.spec.whatwg.org/#insert-adjacent
pub fn insert_adjacent(&self, where_: AdjacentPosition, node: &Node)
-> Fallible<Option<Root<Node>>> {
let self_node = self.upcast::<Node>();
match where_ {
AdjacentPosition::BeforeBegin => {
if let Some(parent) = self_node.GetParentNode() {
Node::pre_insert(node, &parent, Some(self_node)).map(Some)
} else {
Ok(None)
}
}
AdjacentPosition::AfterBegin => {
Node::pre_insert(node, &self_node, self_node.GetFirstChild().r()).map(Some)
}
AdjacentPosition::BeforeEnd => {
Node::pre_insert(node, &self_node, None).map(Some)
}
AdjacentPosition::AfterEnd => {
if let Some(parent) = self_node.GetParentNode() {
Node::pre_insert(node, &parent, self_node.GetNextSibling().r()).map(Some)
} else {
Ok(None)
}
}
}
}
// https://drafts.csswg.org/cssom-view/#dom-element-scroll
pub fn scroll(&self, x_: f64, y_: f64, behavior: ScrollBehavior) {
// Step 1.2 or 2.3
let x = if x_.is_finite() { x_ } else { 0.0f64 };
let y = if y_.is_finite() { y_ } else { 0.0f64 };
let node = self.upcast::<Node>();
// Step 3
let doc = node.owner_doc();
// Step 4
if !doc.is_fully_active() {
return;
}
// Step 5
let win = match doc.GetDefaultView() {
None => return,
Some(win) => win,
};
// Step 7
if *self.root_element() == *self {
if doc.quirks_mode() != QuirksMode::Quirks {
win.scroll(x, y, behavior);
}
return;
}
// Step 9
if doc.GetBody().r() == self.downcast::<HTMLElement>() &&
doc.quirks_mode() == QuirksMode::Quirks &&
!self.potentially_scrollable() {
win.scroll(x, y, behavior);
return;
}
// Step 10 (TODO)
// Step 11
win.scroll_node(node, x, y, behavior);
}
// https://w3c.github.io/DOM-Parsing/#parsing
pub fn parse_fragment(&self, markup: DOMString) -> Fallible<Root<DocumentFragment>> {
// Steps 1-2.
let context_document = document_from_node(self);
// TODO(#11995): XML case.
let new_children = ServoParser::parse_html_fragment(self, markup);
// Step 3.
let fragment = DocumentFragment::new(&context_document);
// Step 4.
for child in new_children {
fragment.upcast::<Node>().AppendChild(&child).unwrap();
}
// Step 5.
Ok(fragment)
}
pub fn fragment_parsing_context(owner_doc: &Document, element: Option<&Self>) -> Root<Self> {
match element {
Some(elem) if elem.local_name() != &local_name!("html") || !elem.html_element_in_html_document() => {
Root::from_ref(elem)
},
_ => {
Root::upcast(HTMLBodyElement::new(local_name!("body"), None, owner_doc))
}
}
}
// https://fullscreen.spec.whatwg.org/#fullscreen-element-ready-check
pub fn fullscreen_element_ready_check(&self) -> bool {
if !self.is_connected() {
return false
}
let document = document_from_node(self);
document.get_allow_fullscreen()
}
// https://html.spec.whatwg.org/multipage/#home-subtree
pub fn is_in_same_home_subtree<T>(&self, other: &T) -> bool
where T: DerivedFrom<Element> + DomObject
{
let other = other.upcast::<Element>();
self.root_element() == other.root_element()
}
}
impl ElementMethods for Element {
// https://dom.spec.whatwg.org/#dom-element-namespaceuri
fn GetNamespaceURI(&self) -> Option<DOMString> {
Node::namespace_to_string(self.namespace.clone())
}
// https://dom.spec.whatwg.org/#dom-element-localname
fn LocalName(&self) -> DOMString {
// FIXME(ajeffrey): Convert directly from LocalName to DOMString
DOMString::from(&*self.local_name)
}
// https://dom.spec.whatwg.org/#dom-element-prefix
fn GetPrefix(&self) -> Option<DOMString> {
self.prefix.as_ref().map(|p| DOMString::from(&**p))
}
// https://dom.spec.whatwg.org/#dom-element-tagname
fn TagName(&self) -> DOMString {
let name = self.tag_name.or_init(|| {
let qualified_name = match self.prefix {
Some(ref prefix) => {
Cow::Owned(format!("{}:{}", &**prefix, &*self.local_name))
},
None => Cow::Borrowed(&*self.local_name)
};
if self.html_element_in_html_document() {
LocalName::from(qualified_name.to_ascii_uppercase())
} else {
LocalName::from(qualified_name)
}
});
DOMString::from(&*name)
}
// https://dom.spec.whatwg.org/#dom-element-id
fn Id(&self) -> DOMString {
self.get_string_attribute(&local_name!("id"))
}
// https://dom.spec.whatwg.org/#dom-element-id
fn SetId(&self, id: DOMString) {
self.set_atomic_attribute(&local_name!("id"), id);
}
// https://dom.spec.whatwg.org/#dom-element-classname
fn ClassName(&self) -> DOMString {
self.get_string_attribute(&local_name!("class"))
}
// https://dom.spec.whatwg.org/#dom-element-classname
fn SetClassName(&self, class: DOMString) {
self.set_tokenlist_attribute(&local_name!("class"), class);
}
// https://dom.spec.whatwg.org/#dom-element-classlist
fn ClassList(&self) -> Root<DOMTokenList> {
self.class_list.or_init(|| DOMTokenList::new(self, &local_name!("class")))
}
// https://dom.spec.whatwg.org/#dom-element-attributes
fn Attributes(&self) -> Root<NamedNodeMap> {
self.attr_list.or_init(|| NamedNodeMap::new(&window_from_node(self), self))
}
// https://dom.spec.whatwg.org/#dom-element-hasattributes
fn HasAttributes(&self) -> bool {
!self.attrs.borrow().is_empty()
}
// https://dom.spec.whatwg.org/#dom-element-getattributenames
fn GetAttributeNames(&self) -> Vec<DOMString> {
self.attrs.borrow().iter().map(|attr| attr.Name()).collect()
}
// https://dom.spec.whatwg.org/#dom-element-getattribute
fn GetAttribute(&self, name: DOMString) -> Option<DOMString> {
self.GetAttributeNode(name)
.map(|s| s.Value())
}
// https://dom.spec.whatwg.org/#dom-element-getattributens
fn GetAttributeNS(&self,
namespace: Option<DOMString>,
local_name: DOMString)
-> Option<DOMString> {
self.GetAttributeNodeNS(namespace, local_name)
.map(|attr| attr.Value())
}
// https://dom.spec.whatwg.org/#dom-element-getattributenode
fn GetAttributeNode(&self, name: DOMString) -> Option<Root<Attr>> {
self.get_attribute_by_name(name)
}
// https://dom.spec.whatwg.org/#dom-element-getattributenodens
fn GetAttributeNodeNS(&self,
namespace: Option<DOMString>,
local_name: DOMString)
-> Option<Root<Attr>> {
let namespace = &namespace_from_domstring(namespace);
self.get_attribute(namespace, &LocalName::from(local_name))
}
// https://dom.spec.whatwg.org/#dom-element-setattribute
fn SetAttribute(&self, name: DOMString, value: DOMString) -> ErrorResult {
// Step 1.
if xml_name_type(&name) == InvalidXMLName {
return Err(Error::InvalidCharacter);
}
// Step 2.
let name = self.parsed_name(name);
// Step 3-5.
let value = self.parse_attribute(&ns!(), &name, value);
self.set_first_matching_attribute(
name.clone(), value, name.clone(), ns!(), None,
|attr| *attr.name() == name);
Ok(())
}
// https://dom.spec.whatwg.org/#dom-element-setattributens
fn SetAttributeNS(&self,
namespace: Option<DOMString>,
qualified_name: DOMString,
value: DOMString) -> ErrorResult {
let (namespace, prefix, local_name) =
validate_and_extract(namespace, &qualified_name)?;
let qualified_name = LocalName::from(qualified_name);
let value = self.parse_attribute(&namespace, &local_name, value);
self.set_first_matching_attribute(
local_name.clone(), value, qualified_name, namespace.clone(), prefix,
|attr| *attr.local_name() == local_name && *attr.namespace() == namespace);
Ok(())
}
// https://dom.spec.whatwg.org/#dom-element-setattributenode
fn SetAttributeNode(&self, attr: &Attr) -> Fallible<Option<Root<Attr>>> {
// Workaround for https://github.com/servo/servo/issues/17366
// This ensures that if this is an "id" attr, its value is an Atom
attr.swap_value(&mut self.parse_plain_attribute(attr.local_name(), attr.Value()));
// Step 1.
if let Some(owner) = attr.GetOwnerElement() {
if &*owner != self {
return Err(Error::InUseAttribute);
}
}
// Step 2.
let position = self.attrs.borrow().iter().position(|old_attr| {
attr.namespace() == old_attr.namespace() && attr.local_name() == old_attr.local_name()
});
if let Some(position) = position {
let old_attr = Root::from_ref(&*self.attrs.borrow()[position]);
// Step 3.
if &*old_attr == attr {
return Ok(Some(Root::from_ref(attr)));
}
// Step 4.
self.will_mutate_attr(attr);
attr.set_owner(Some(self));
self.attrs.borrow_mut()[position] = JS::from_ref(attr);
old_attr.set_owner(None);
if attr.namespace() == &ns!() {
vtable_for(self.upcast()).attribute_mutated(
&attr, AttributeMutation::Set(Some(&old_attr.value())));
}
// Step 6.
Ok(Some(old_attr))
} else {
// Step 5.
attr.set_owner(Some(self));
self.push_attribute(attr);
// Step 6.
Ok(None)
}
}
// https://dom.spec.whatwg.org/#dom-element-setattributenodens
fn SetAttributeNodeNS(&self, attr: &Attr) -> Fallible<Option<Root<Attr>>> {
self.SetAttributeNode(attr)
}
// https://dom.spec.whatwg.org/#dom-element-removeattribute
fn RemoveAttribute(&self, name: DOMString) {
let name = self.parsed_name(name);
self.remove_attribute_by_name(&name);
}
// https://dom.spec.whatwg.org/#dom-element-removeattributens
fn RemoveAttributeNS(&self, namespace: Option<DOMString>, local_name: DOMString) {
let namespace = namespace_from_domstring(namespace);
let local_name = LocalName::from(local_name);
self.remove_attribute(&namespace, &local_name);
}
// https://dom.spec.whatwg.org/#dom-element-removeattributenode
fn RemoveAttributeNode(&self, attr: &Attr) -> Fallible<Root<Attr>> {
self.remove_first_matching_attribute(|a| a == attr)
.ok_or(Error::NotFound)
}
// https://dom.spec.whatwg.org/#dom-element-hasattribute
fn HasAttribute(&self, name: DOMString) -> bool {
self.GetAttribute(name).is_some()
}
// https://dom.spec.whatwg.org/#dom-element-hasattributens
fn HasAttributeNS(&self, namespace: Option<DOMString>, local_name: DOMString) -> bool {
self.GetAttributeNS(namespace, local_name).is_some()
}
// https://dom.spec.whatwg.org/#dom-element-getelementsbytagname
fn GetElementsByTagName(&self, localname: DOMString) -> Root<HTMLCollection> {
let window = window_from_node(self);
HTMLCollection::by_qualified_name(&window, self.upcast(), LocalName::from(&*localname))
}
// https://dom.spec.whatwg.org/#dom-element-getelementsbytagnamens
fn GetElementsByTagNameNS(&self,
maybe_ns: Option<DOMString>,
localname: DOMString)
-> Root<HTMLCollection> {
let window = window_from_node(self);
HTMLCollection::by_tag_name_ns(&window, self.upcast(), localname, maybe_ns)
}
// https://dom.spec.whatwg.org/#dom-element-getelementsbyclassname
fn GetElementsByClassName(&self, classes: DOMString) -> Root<HTMLCollection> {
let window = window_from_node(self);
HTMLCollection::by_class_name(&window, self.upcast(), classes)
}
// https://drafts.csswg.org/cssom-view/#dom-element-getclientrects
fn GetClientRects(&self) -> Vec<Root<DOMRect>> {
let win = window_from_node(self);
let raw_rects = self.upcast::<Node>().content_boxes();
raw_rects.iter().map(|rect| {
DOMRect::new(win.upcast(),
rect.origin.x.to_f64_px(),
rect.origin.y.to_f64_px(),
rect.size.width.to_f64_px(),
rect.size.height.to_f64_px())
}).collect()
}
// https://drafts.csswg.org/cssom-view/#dom-element-getboundingclientrect
fn GetBoundingClientRect(&self) -> Root<DOMRect> {
let win = window_from_node(self);
let rect = self.upcast::<Node>().bounding_content_box_or_zero();
DOMRect::new(win.upcast(),
rect.origin.x.to_f64_px(),
rect.origin.y.to_f64_px(),
rect.size.width.to_f64_px(),
rect.size.height.to_f64_px())
}
// https://drafts.csswg.org/cssom-view/#dom-element-scroll
fn Scroll(&self, options: &ScrollToOptions) {
// Step 1
let left = options.left.unwrap_or(self.ScrollLeft());
let top = options.top.unwrap_or(self.ScrollTop());
self.scroll(left, top, options.parent.behavior);
}
// https://drafts.csswg.org/cssom-view/#dom-element-scroll
fn Scroll_(&self, x: f64, y: f64) {
self.scroll(x, y, ScrollBehavior::Auto);
}
// https://drafts.csswg.org/cssom-view/#dom-element-scrollto
fn ScrollTo(&self, options: &ScrollToOptions) {
self.Scroll(options);
}
// https://drafts.csswg.org/cssom-view/#dom-element-scrollto
fn ScrollTo_(&self, x: f64, y: f64) {
self.Scroll_(x, y);
}
// https://drafts.csswg.org/cssom-view/#dom-element-scrollby
fn ScrollBy(&self, options: &ScrollToOptions) {
// Step 2
let delta_left = options.left.unwrap_or(0.0f64);
let delta_top = options.top.unwrap_or(0.0f64);
let left = self.ScrollLeft();
let top = self.ScrollTop();
self.scroll(left + delta_left, top + delta_top,
options.parent.behavior);
}
// https://drafts.csswg.org/cssom-view/#dom-element-scrollby
fn ScrollBy_(&self, x: f64, y: f64) {
let left = self.ScrollLeft();
let top = self.ScrollTop();
self.scroll(left + x, top + y, ScrollBehavior::Auto);
}
// https://drafts.csswg.org/cssom-view/#dom-element-scrolltop
fn ScrollTop(&self) -> f64 {
let node = self.upcast::<Node>();
// Step 1
let doc = node.owner_doc();
// Step 2
if !doc.is_fully_active() {
return 0.0;
}
// Step 3
let win = match doc.GetDefaultView() {
None => return 0.0,
Some(win) => win,
};
// Step 5
if *self.root_element() == *self {
if doc.quirks_mode() == QuirksMode::Quirks {
return 0.0;
}
// Step 6
return win.ScrollY() as f64;
}
// Step 7
if doc.GetBody().r() == self.downcast::<HTMLElement>() &&
doc.quirks_mode() == QuirksMode::Quirks &&
!self.potentially_scrollable() {
return win.ScrollY() as f64;
}
// Step 8
if !self.has_css_layout_box() {
return 0.0;
}
// Step 9
let point = node.scroll_offset();
return point.y.abs() as f64;
}
// https://drafts.csswg.org/cssom-view/#dom-element-scrolltop
fn SetScrollTop(&self, y_: f64) {
let behavior = ScrollBehavior::Auto;
// Step 1, 2
let y = if y_.is_finite() { y_ } else { 0.0f64 };
let node = self.upcast::<Node>();
// Step 3
let doc = node.owner_doc();
// Step 4
if !doc.is_fully_active() {
return;
}
// Step 5
let win = match doc.GetDefaultView() {
None => return,
Some(win) => win,
};
// Step 7
if *self.root_element() == *self {
if doc.quirks_mode() != QuirksMode::Quirks {
win.scroll(win.ScrollX() as f64, y, behavior);
}
return;
}
// Step 9
if doc.GetBody().r() == self.downcast::<HTMLElement>() &&
doc.quirks_mode() == QuirksMode::Quirks &&
!self.potentially_scrollable() {
win.scroll(win.ScrollX() as f64, y, behavior);
return;
}
// Step 10 (TODO)
// Step 11
win.scroll_node(node, self.ScrollLeft(), y, behavior);
}
// https://drafts.csswg.org/cssom-view/#dom-element-scrolltop
fn ScrollLeft(&self) -> f64 {
let node = self.upcast::<Node>();
// Step 1
let doc = node.owner_doc();
// Step 2
if !doc.is_fully_active() {
return 0.0;
}
// Step 3
let win = match doc.GetDefaultView() {
None => return 0.0,
Some(win) => win,
};
// Step 5
if *self.root_element() == *self {
if doc.quirks_mode() != QuirksMode::Quirks {
// Step 6
return win.ScrollX() as f64;
}
return 0.0;
}
// Step 7
if doc.GetBody().r() == self.downcast::<HTMLElement>() &&
doc.quirks_mode() == QuirksMode::Quirks &&
!self.potentially_scrollable() {
return win.ScrollX() as f64;
}
// Step 8
if !self.has_css_layout_box() {
return 0.0;
}
// Step 9
let point = node.scroll_offset();
return point.x.abs() as f64;
}
// https://drafts.csswg.org/cssom-view/#dom-element-scrollleft
fn SetScrollLeft(&self, x_: f64) {
let behavior = ScrollBehavior::Auto;
// Step 1, 2
let x = if x_.is_finite() { x_ } else { 0.0f64 };
let node = self.upcast::<Node>();
// Step 3
let doc = node.owner_doc();
// Step 4
if !doc.is_fully_active() {
return;
}
// Step 5
let win = match doc.GetDefaultView() {
None => return,
Some(win) => win,
};
// Step 7
if *self.root_element() == *self {
if doc.quirks_mode() == QuirksMode::Quirks {
return;
}
win.scroll(x, win.ScrollY() as f64, behavior);
return;
}
// Step 9
if doc.GetBody().r() == self.downcast::<HTMLElement>() &&
doc.quirks_mode() == QuirksMode::Quirks &&
!self.potentially_scrollable() {
win.scroll(x, win.ScrollY() as f64, behavior);
return;
}
// Step 10 (TODO)
// Step 11
win.scroll_node(node, x, self.ScrollTop(), behavior);
}
// https://drafts.csswg.org/cssom-view/#dom-element-scrollwidth
fn ScrollWidth(&self) -> i32 {
self.upcast::<Node>().scroll_area().size.width
}
// https://drafts.csswg.org/cssom-view/#dom-element-scrollheight
fn ScrollHeight(&self) -> i32 {
self.upcast::<Node>().scroll_area().size.height
}
// https://drafts.csswg.org/cssom-view/#dom-element-clienttop
fn ClientTop(&self) -> i32 {
self.upcast::<Node>().client_rect().origin.y
}
// https://drafts.csswg.org/cssom-view/#dom-element-clientleft
fn ClientLeft(&self) -> i32 {
self.upcast::<Node>().client_rect().origin.x
}
// https://drafts.csswg.org/cssom-view/#dom-element-clientwidth
fn ClientWidth(&self) -> i32 {
self.upcast::<Node>().client_rect().size.width
}
// https://drafts.csswg.org/cssom-view/#dom-element-clientheight
fn ClientHeight(&self) -> i32 {
self.upcast::<Node>().client_rect().size.height
}
/// https://w3c.github.io/DOM-Parsing/#widl-Element-innerHTML
fn GetInnerHTML(&self) -> Fallible<DOMString> {
// XXX TODO: XML case
self.serialize(ChildrenOnly)
}
/// https://w3c.github.io/DOM-Parsing/#widl-Element-innerHTML
fn SetInnerHTML(&self, value: DOMString) -> ErrorResult {
// Step 1.
let frag = self.parse_fragment(value)?;
// Step 2.
// https://github.com/w3c/DOM-Parsing/issues/1
let target = if let Some(template) = self.downcast::<HTMLTemplateElement>() {
Root::upcast(template.Content())
} else {
Root::from_ref(self.upcast())
};
Node::replace_all(Some(frag.upcast()), &target);
Ok(())
}
// https://dvcs.w3.org/hg/innerhtml/raw-file/tip/index.html#widl-Element-outerHTML
fn GetOuterHTML(&self) -> Fallible<DOMString> {
self.serialize(IncludeNode)
}
// https://w3c.github.io/DOM-Parsing/#dom-element-outerhtml
fn SetOuterHTML(&self, value: DOMString) -> ErrorResult {
let context_document = document_from_node(self);
let context_node = self.upcast::<Node>();
// Step 1.
let context_parent = match context_node.GetParentNode() {
None => {
// Step 2.
return Ok(());
},
Some(parent) => parent,
};
let parent = match context_parent.type_id() {
// Step 3.
NodeTypeId::Document(_) => return Err(Error::NoModificationAllowed),
// Step 4.
NodeTypeId::DocumentFragment => {
let body_elem = Element::create(QualName::new(None, ns!(html), local_name!("body")),
&context_document,
ElementCreator::ScriptCreated);
Root::upcast(body_elem)
},
_ => context_node.GetParentElement().unwrap()
};
// Step 5.
let frag = parent.parse_fragment(value)?;
// Step 6.
context_parent.ReplaceChild(frag.upcast(), context_node)?;
Ok(())
}
// https://dom.spec.whatwg.org/#dom-nondocumenttypechildnode-previouselementsibling
fn GetPreviousElementSibling(&self) -> Option<Root<Element>> {
self.upcast::<Node>().preceding_siblings().filter_map(Root::downcast).next()
}
// https://dom.spec.whatwg.org/#dom-nondocumenttypechildnode-nextelementsibling
fn GetNextElementSibling(&self) -> Option<Root<Element>> {
self.upcast::<Node>().following_siblings().filter_map(Root::downcast).next()
}
// https://dom.spec.whatwg.org/#dom-parentnode-children
fn Children(&self) -> Root<HTMLCollection> {
let window = window_from_node(self);
HTMLCollection::children(&window, self.upcast())
}
// https://dom.spec.whatwg.org/#dom-parentnode-firstelementchild
fn GetFirstElementChild(&self) -> Option<Root<Element>> {
self.upcast::<Node>().child_elements().next()
}
// https://dom.spec.whatwg.org/#dom-parentnode-lastelementchild
fn GetLastElementChild(&self) -> Option<Root<Element>> {
self.upcast::<Node>().rev_children().filter_map(Root::downcast::<Element>).next()
}
// https://dom.spec.whatwg.org/#dom-parentnode-childelementcount
fn ChildElementCount(&self) -> u32 {
self.upcast::<Node>().child_elements().count() as u32
}
// https://dom.spec.whatwg.org/#dom-parentnode-prepend
fn Prepend(&self, nodes: Vec<NodeOrString>) -> ErrorResult {
self.upcast::<Node>().prepend(nodes)
}
// https://dom.spec.whatwg.org/#dom-parentnode-append
fn Append(&self, nodes: Vec<NodeOrString>) -> ErrorResult {
self.upcast::<Node>().append(nodes)
}
// https://dom.spec.whatwg.org/#dom-parentnode-queryselector
fn QuerySelector(&self, selectors: DOMString) -> Fallible<Option<Root<Element>>> {
let root = self.upcast::<Node>();
root.query_selector(selectors)
}
// https://dom.spec.whatwg.org/#dom-parentnode-queryselectorall
fn QuerySelectorAll(&self, selectors: DOMString) -> Fallible<Root<NodeList>> {
let root = self.upcast::<Node>();
root.query_selector_all(selectors)
}
// https://dom.spec.whatwg.org/#dom-childnode-before
fn Before(&self, nodes: Vec<NodeOrString>) -> ErrorResult {
self.upcast::<Node>().before(nodes)
}
// https://dom.spec.whatwg.org/#dom-childnode-after
fn After(&self, nodes: Vec<NodeOrString>) -> ErrorResult {
self.upcast::<Node>().after(nodes)
}
// https://dom.spec.whatwg.org/#dom-childnode-replacewith
fn ReplaceWith(&self, nodes: Vec<NodeOrString>) -> ErrorResult {
self.upcast::<Node>().replace_with(nodes)
}
// https://dom.spec.whatwg.org/#dom-childnode-remove
fn Remove(&self) {
self.upcast::<Node>().remove_self();
}
// https://dom.spec.whatwg.org/#dom-element-matches
fn Matches(&self, selectors: DOMString) -> Fallible<bool> {
match SelectorParser::parse_author_origin_no_namespace(&selectors) {
Err(_) => Err(Error::Syntax),
Ok(selectors) => {
let quirks_mode = document_from_node(self).quirks_mode();
let mut ctx = MatchingContext::new(MatchingMode::Normal, None,
quirks_mode);
Ok(matches_selector_list(&selectors, &Root::from_ref(self), &mut ctx))
}
}
}
// https://dom.spec.whatwg.org/#dom-element-webkitmatchesselector
fn WebkitMatchesSelector(&self, selectors: DOMString) -> Fallible<bool> {
self.Matches(selectors)
}
// https://dom.spec.whatwg.org/#dom-element-closest
fn Closest(&self, selectors: DOMString) -> Fallible<Option<Root<Element>>> {
match SelectorParser::parse_author_origin_no_namespace(&selectors) {
Err(_) => Err(Error::Syntax),
Ok(selectors) => {
let root = self.upcast::<Node>();
for element in root.inclusive_ancestors() {
if let Some(element) = Root::downcast::<Element>(element) {
let quirks_mode = document_from_node(self).quirks_mode();
let mut ctx = MatchingContext::new(MatchingMode::Normal, None,
quirks_mode);
if matches_selector_list(&selectors, &element, &mut ctx) {
return Ok(Some(element));
}
}
}
Ok(None)
}
}
}
// https://dom.spec.whatwg.org/#dom-element-insertadjacentelement
fn InsertAdjacentElement(&self, where_: DOMString, element: &Element)
-> Fallible<Option<Root<Element>>> {
let where_ = AdjacentPosition::try_from(&*where_)?;
let inserted_node = self.insert_adjacent(where_, element.upcast())?;
Ok(inserted_node.map(|node| Root::downcast(node).unwrap()))
}
// https://dom.spec.whatwg.org/#dom-element-insertadjacenttext
fn InsertAdjacentText(&self, where_: DOMString, data: DOMString)
-> ErrorResult {
// Step 1.
let text = Text::new(data, &document_from_node(self));
// Step 2.
let where_ = AdjacentPosition::try_from(&*where_)?;
self.insert_adjacent(where_, text.upcast()).map(|_| ())
}
// https://w3c.github.io/DOM-Parsing/#dom-element-insertadjacenthtml
fn InsertAdjacentHTML(&self, position: DOMString, text: DOMString)
-> ErrorResult {
// Step 1.
let position = AdjacentPosition::try_from(&*position)?;
let context = match position {
AdjacentPosition::BeforeBegin | AdjacentPosition::AfterEnd => {
match self.upcast::<Node>().GetParentNode() {
Some(ref node) if node.is::<Document>() => {
return Err(Error::NoModificationAllowed)
}
None => return Err(Error::NoModificationAllowed),
Some(node) => node,
}
}
AdjacentPosition::AfterBegin | AdjacentPosition::BeforeEnd => {
Root::from_ref(self.upcast::<Node>())
}
};
// Step 2.
let context = Element::fragment_parsing_context(
&context.owner_doc(), context.downcast::<Element>());
// Step 3.
let fragment = context.parse_fragment(text)?;
// Step 4.
self.insert_adjacent(position, fragment.upcast()).map(|_| ())
}
// check-tidy: no specs after this line
fn EnterFormalActivationState(&self) -> ErrorResult {
match self.as_maybe_activatable() {
Some(a) => {
a.enter_formal_activation_state();
return Ok(());
},
None => return Err(Error::NotSupported)
}
}
fn ExitFormalActivationState(&self) -> ErrorResult {
match self.as_maybe_activatable() {
Some(a) => {
a.exit_formal_activation_state();
return Ok(());
},
None => return Err(Error::NotSupported)
}
}
// https://fullscreen.spec.whatwg.org/#dom-element-requestfullscreen
#[allow(unrooted_must_root)]
fn RequestFullscreen(&self) -> Rc<Promise> {
let doc = document_from_node(self);
doc.enter_fullscreen(self)
}
}
impl VirtualMethods for Element {
fn super_type(&self) -> Option<&VirtualMethods> {
Some(self.upcast::<Node>() as &VirtualMethods)
}
fn attribute_mutated(&self, attr: &Attr, mutation: AttributeMutation) {
self.super_type().unwrap().attribute_mutated(attr, mutation);
let node = self.upcast::<Node>();
let doc = node.owner_doc();
match attr.local_name() {
&local_name!("style") => {
// Modifying the `style` attribute might change style.
*self.style_attribute.borrow_mut() = match mutation {
AttributeMutation::Set(..) => {
// This is the fast path we use from
// CSSStyleDeclaration.
//
// Juggle a bit to keep the borrow checker happy
// while avoiding the extra clone.
let is_declaration = match *attr.value() {
AttrValue::Declaration(..) => true,
_ => false,
};
let block = if is_declaration {
let mut value = AttrValue::String(String::new());
attr.swap_value(&mut value);
let (serialization, block) = match value {
AttrValue::Declaration(s, b) => (s, b),
_ => unreachable!(),
};
let mut value = AttrValue::String(serialization);
attr.swap_value(&mut value);
block
} else {
let win = window_from_node(self);
Arc::new(doc.style_shared_lock().wrap(parse_style_attribute(
&attr.value(),
&doc.base_url(),
win.css_error_reporter(),
doc.quirks_mode())))
};
Some(block)
}
AttributeMutation::Removed => {
None
}
};
},
&local_name!("id") => {
*self.id_attribute.borrow_mut() =
mutation.new_value(attr).and_then(|value| {
let value = value.as_atom();
if value != &atom!("") {
Some(value.clone())
} else {
None
}
});
if node.is_in_doc() {
let value = attr.value().as_atom().clone();
match mutation {
AttributeMutation::Set(old_value) => {
if let Some(old_value) = old_value {
let old_value = old_value.as_atom().clone();
doc.unregister_named_element(self, old_value);
}
if value != atom!("") {
doc.register_named_element(self, value);
}
},
AttributeMutation::Removed => {
if value != atom!("") {
doc.unregister_named_element(self, value);
}
}
}
}
},
_ => {
// FIXME(emilio): This is pretty dubious, and should be done in
// the relevant super-classes.
if attr.namespace() == &ns!() &&
attr.local_name() == &local_name!("src") {
node.dirty(NodeDamage::OtherNodeDamage);
}
},
};
// Make sure we rev the version even if we didn't dirty the node. If we
// don't do this, various attribute-dependent htmlcollections (like those
// generated by getElementsByClassName) might become stale.
node.rev_version();
}
fn parse_plain_attribute(&self, name: &LocalName, value: DOMString) -> AttrValue {
match name {
&local_name!("id") => AttrValue::from_atomic(value.into()),
&local_name!("class") => AttrValue::from_serialized_tokenlist(value.into()),
_ => self.super_type().unwrap().parse_plain_attribute(name, value),
}
}
fn bind_to_tree(&self, tree_in_doc: bool) {
if let Some(ref s) = self.super_type() {
s.bind_to_tree(tree_in_doc);
}
if let Some(f) = self.as_maybe_form_control() {
f.bind_form_control_to_tree();
}
if !tree_in_doc {
return;
}
let doc = document_from_node(self);
if let Some(ref value) = *self.id_attribute.borrow() {
doc.register_named_element(self, value.clone());
}
// This is used for layout optimization.
doc.increment_dom_count();
}
fn unbind_from_tree(&self, context: &UnbindContext) {
self.super_type().unwrap().unbind_from_tree(context);
if let Some(f) = self.as_maybe_form_control() {
f.unbind_form_control_from_tree();
}
if !context.tree_in_doc {
return;
}
let doc = document_from_node(self);
let fullscreen = doc.GetFullscreenElement();
if fullscreen.r() == Some(self) {
doc.exit_fullscreen();
}
if let Some(ref value) = *self.id_attribute.borrow() {
doc.unregister_named_element(self, value.clone());
}
// This is used for layout optimization.
doc.decrement_dom_count();
}
fn children_changed(&self, mutation: &ChildrenMutation) {
if let Some(ref s) = self.super_type() {
s.children_changed(mutation);
}
let flags = self.selector_flags.get();
if flags.intersects(HAS_SLOW_SELECTOR) {
// All children of this node need to be restyled when any child changes.
self.upcast::<Node>().dirty(NodeDamage::OtherNodeDamage);
} else {
if flags.intersects(HAS_SLOW_SELECTOR_LATER_SIBLINGS) {
if let Some(next_child) = mutation.next_child() {
for child in next_child.inclusively_following_siblings() {
if child.is::<Element>() {
child.dirty(NodeDamage::OtherNodeDamage);
}
}
}
}
if flags.intersects(HAS_EDGE_CHILD_SELECTOR) {
if let Some(child) = mutation.modified_edge_element() {
child.dirty(NodeDamage::OtherNodeDamage);
}
}
}
}
fn adopting_steps(&self, old_doc: &Document) {
self.super_type().unwrap().adopting_steps(old_doc);
if document_from_node(self).is_html_document() != old_doc.is_html_document() {
self.tag_name.clear();
}
}
}
impl<'a> ::selectors::Element for Root<Element> {
type Impl = SelectorImpl;
fn parent_element(&self) -> Option<Root<Element>> {
self.upcast::<Node>().GetParentElement()
}
fn match_pseudo_element(&self,
_pseudo: &PseudoElement,
_context: &mut MatchingContext)
-> bool
{
false
}
fn first_child_element(&self) -> Option<Root<Element>> {
self.node.child_elements().next()
}
fn last_child_element(&self) -> Option<Root<Element>> {
self.node.rev_children().filter_map(Root::downcast).next()
}
fn prev_sibling_element(&self) -> Option<Root<Element>> {
self.node.preceding_siblings().filter_map(Root::downcast).next()
}
fn next_sibling_element(&self) -> Option<Root<Element>> {
self.node.following_siblings().filter_map(Root::downcast).next()
}
fn attr_matches(&self,
ns: &NamespaceConstraint<&Namespace>,
local_name: &LocalName,
operation: &AttrSelectorOperation<&String>)
-> bool {
match *ns {
NamespaceConstraint::Specific(ref ns) => {
self.get_attribute(ns, local_name)
.map_or(false, |attr| attr.value().eval_selector(operation))
}
NamespaceConstraint::Any => {
self.attrs.borrow().iter().any(|attr| {
attr.local_name() == local_name &&
attr.value().eval_selector(operation)
})
}
}
}
fn is_root(&self) -> bool {
match self.node.GetParentNode() {
None => false,
Some(node) => node.is::<Document>(),
}
}
fn is_empty(&self) -> bool {
self.node.children().all(|node| !node.is::<Element>() && match node.downcast::<Text>() {
None => true,
Some(text) => text.upcast::<CharacterData>().data().is_empty()
})
}
fn get_local_name(&self) -> &LocalName {
self.local_name()
}
fn get_namespace(&self) -> &Namespace {
self.namespace()
}
fn match_non_ts_pseudo_class<F>(&self,
pseudo_class: &NonTSPseudoClass,
_: &mut LocalMatchingContext<Self::Impl>,
_: &RelevantLinkStatus,
_: &mut F)
-> bool
where F: FnMut(&Self, ElementSelectorFlags),
{
match *pseudo_class {
// https://github.com/servo/servo/issues/8718
NonTSPseudoClass::Link |
NonTSPseudoClass::AnyLink => self.is_link(),
NonTSPseudoClass::Visited => false,
NonTSPseudoClass::ServoNonZeroBorder => {
match self.downcast::<HTMLTableElement>() {
None => false,
Some(this) => {
match this.get_border() {
None | Some(0) => false,
Some(_) => true,
}
}
}
},
NonTSPseudoClass::ServoCaseSensitiveTypeAttr(ref expected_value) => {
self.get_attribute(&ns!(), &local_name!("type"))
.map_or(false, |attr| attr.value().eq(expected_value))
}
// FIXME(heycam): This is wrong, since extended_filtering accepts
// a string containing commas (separating each language tag in
// a list) but the pseudo-class instead should be parsing and
// storing separate <ident> or <string>s for each language tag.
NonTSPseudoClass::Lang(ref lang) => extended_filtering(&*self.get_lang(), &*lang),
NonTSPseudoClass::ReadOnly =>
!Element::state(self).contains(pseudo_class.state_flag()),
NonTSPseudoClass::Active |
NonTSPseudoClass::Focus |
NonTSPseudoClass::Fullscreen |
NonTSPseudoClass::Hover |
NonTSPseudoClass::Enabled |
NonTSPseudoClass::Disabled |
NonTSPseudoClass::Checked |
NonTSPseudoClass::Indeterminate |
NonTSPseudoClass::ReadWrite |
NonTSPseudoClass::PlaceholderShown |
NonTSPseudoClass::Target =>
Element::state(self).contains(pseudo_class.state_flag()),
}
}
fn is_link(&self) -> bool {
// FIXME: This is HTML only.
let node = self.upcast::<Node>();
match node.type_id() {
// https://html.spec.whatwg.org/multipage/#selector-link
NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLAnchorElement)) |
NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLAreaElement)) |
NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLLinkElement)) => {
self.has_attribute(&local_name!("href"))
},
_ => false,
}
}
fn has_id(&self, id: &Atom, case_sensitivity: CaseSensitivity) -> bool {
self.id_attribute.borrow().as_ref().map_or(false, |atom| case_sensitivity.eq_atom(id, atom))
}
fn has_class(&self, name: &Atom, case_sensitivity: CaseSensitivity) -> bool {
Element::has_class(&**self, name, case_sensitivity)
}
fn is_html_element_in_html_document(&self) -> bool {
self.html_element_in_html_document()
}
}
impl Element {
pub fn as_maybe_activatable(&self) -> Option<&Activatable> {
let element = match self.upcast::<Node>().type_id() {
NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLInputElement)) => {
let element = self.downcast::<HTMLInputElement>().unwrap();
Some(element as &Activatable)
},
NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLButtonElement)) => {
let element = self.downcast::<HTMLButtonElement>().unwrap();
Some(element as &Activatable)
},
NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLAnchorElement)) => {
let element = self.downcast::<HTMLAnchorElement>().unwrap();
Some(element as &Activatable)
},
NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLLabelElement)) => {
let element = self.downcast::<HTMLLabelElement>().unwrap();
Some(element as &Activatable)
},
_ => {
None
}
};
element.and_then(|elem| {
if elem.is_instance_activatable() {
Some(elem)
} else {
None
}
})
}
pub fn as_stylesheet_owner(&self) -> Option<&StylesheetOwner> {
if let Some(s) = self.downcast::<HTMLStyleElement>() {
return Some(s as &StylesheetOwner)
}
if let Some(l) = self.downcast::<HTMLLinkElement>() {
return Some(l as &StylesheetOwner)
}
None
}
// https://html.spec.whatwg.org/multipage/#category-submit
pub fn as_maybe_validatable(&self) -> Option<&Validatable> {
let element = match self.upcast::<Node>().type_id() {
NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLInputElement)) => {
let element = self.downcast::<HTMLInputElement>().unwrap();
Some(element as &Validatable)
},
NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLButtonElement)) => {
let element = self.downcast::<HTMLButtonElement>().unwrap();
Some(element as &Validatable)
},
NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLObjectElement)) => {
let element = self.downcast::<HTMLObjectElement>().unwrap();
Some(element as &Validatable)
},
NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLSelectElement)) => {
let element = self.downcast::<HTMLSelectElement>().unwrap();
Some(element as &Validatable)
},
NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLTextAreaElement)) => {
let element = self.downcast::<HTMLTextAreaElement>().unwrap();
Some(element as &Validatable)
},
_ => {
None
}
};
element
}
pub fn click_in_progress(&self) -> bool {
self.upcast::<Node>().get_flag(CLICK_IN_PROGRESS)
}
pub fn set_click_in_progress(&self, click: bool) {
self.upcast::<Node>().set_flag(CLICK_IN_PROGRESS, click)
}
// https://html.spec.whatwg.org/multipage/#nearest-activatable-element
pub fn nearest_activable_element(&self) -> Option<Root<Element>> {
match self.as_maybe_activatable() {
Some(el) => Some(Root::from_ref(el.as_element())),
None => {
let node = self.upcast::<Node>();
for node in node.ancestors() {
if let Some(node) = node.downcast::<Element>() {
if node.as_maybe_activatable().is_some() {
return Some(Root::from_ref(node));
}
}
}
None
}
}
}
/// Please call this method *only* for real click events
///
/// https://html.spec.whatwg.org/multipage/#run-authentic-click-activation-steps
///
/// Use an element's synthetic click activation (or handle_event) for any script-triggered clicks.
/// If the spec says otherwise, check with Manishearth first
pub fn authentic_click_activation(&self, event: &Event) {
// Not explicitly part of the spec, however this helps enforce the invariants
// required to save state between pre-activation and post-activation
// since we cannot nest authentic clicks (unlike synthetic click activation, where
// the script can generate more click events from the handler)
assert!(!self.click_in_progress());
let target = self.upcast();
// Step 2 (requires canvas support)
// Step 3
self.set_click_in_progress(true);
// Step 4
let e = self.nearest_activable_element();
match e {
Some(ref el) => match el.as_maybe_activatable() {
Some(elem) => {
// Step 5-6
elem.pre_click_activation();
event.fire(target);
if !event.DefaultPrevented() {
// post click activation
elem.activation_behavior(event, target);
} else {
elem.canceled_activation();
}
}
// Step 6
None => {
event.fire(target);
}
},
// Step 6
None => {
event.fire(target);
}
}
// Step 7
self.set_click_in_progress(false);
}
// https://html.spec.whatwg.org/multipage/#language
pub fn get_lang(&self) -> String {
self.upcast::<Node>().inclusive_ancestors().filter_map(|node| {
node.downcast::<Element>().and_then(|el| {
el.get_attribute(&ns!(xml), &local_name!("lang")).or_else(|| {
el.get_attribute(&ns!(), &local_name!("lang"))
}).map(|attr| String::from(attr.Value()))
})
// TODO: Check meta tags for a pragma-set default language
// TODO: Check HTTP Content-Language header
}).next().unwrap_or(String::new())
}
pub fn state(&self) -> ElementState {
self.state.get()
}
pub fn set_state(&self, which: ElementState, value: bool) {
let mut state = self.state.get();
if state.contains(which) == value {
return;
}
let node = self.upcast::<Node>();
node.owner_doc().element_state_will_change(self);
if value {
state.insert(which);
} else {
state.remove(which);
}
self.state.set(state);
}
pub fn active_state(&self) -> bool {
self.state.get().contains(IN_ACTIVE_STATE)
}
/// https://html.spec.whatwg.org/multipage/#concept-selector-active
pub fn set_active_state(&self, value: bool) {
self.set_state(IN_ACTIVE_STATE, value);
if let Some(parent) = self.upcast::<Node>().GetParentElement() {
parent.set_active_state(value);
}
}
pub fn focus_state(&self) -> bool {
self.state.get().contains(IN_FOCUS_STATE)
}
pub fn set_focus_state(&self, value: bool) {
self.set_state(IN_FOCUS_STATE, value);
self.upcast::<Node>().dirty(NodeDamage::OtherNodeDamage);
}
pub fn hover_state(&self) -> bool {
self.state.get().contains(IN_HOVER_STATE)
}
pub fn set_hover_state(&self, value: bool) {
self.set_state(IN_HOVER_STATE, value)
}
pub fn enabled_state(&self) -> bool {
self.state.get().contains(IN_ENABLED_STATE)
}
pub fn set_enabled_state(&self, value: bool) {
self.set_state(IN_ENABLED_STATE, value)
}
pub fn disabled_state(&self) -> bool {
self.state.get().contains(IN_DISABLED_STATE)
}
pub fn set_disabled_state(&self, value: bool) {
self.set_state(IN_DISABLED_STATE, value)
}
pub fn read_write_state(&self) -> bool {
self.state.get().contains(IN_READ_WRITE_STATE)
}
pub fn set_read_write_state(&self, value: bool) {
self.set_state(IN_READ_WRITE_STATE, value)
}
pub fn placeholder_shown_state(&self) -> bool {
self.state.get().contains(IN_PLACEHOLDER_SHOWN_STATE)
}
pub fn set_placeholder_shown_state(&self, value: bool) {
if self.placeholder_shown_state() != value {
self.set_state(IN_PLACEHOLDER_SHOWN_STATE, value);
self.upcast::<Node>().dirty(NodeDamage::OtherNodeDamage);
}
}
pub fn target_state(&self) -> bool {
self.state.get().contains(IN_TARGET_STATE)
}
pub fn set_target_state(&self, value: bool) {
self.set_state(IN_TARGET_STATE, value)
}
pub fn fullscreen_state(&self) -> bool {
self.state.get().contains(IN_FULLSCREEN_STATE)
}
pub fn set_fullscreen_state(&self, value: bool) {
self.set_state(IN_FULLSCREEN_STATE, value)
}
/// https://dom.spec.whatwg.org/#connected
pub fn is_connected(&self) -> bool {
let node = self.upcast::<Node>();
let root = node.GetRootNode();
root.is::<Document>()
}
}
impl Element {
pub fn check_ancestors_disabled_state_for_form_control(&self) {
let node = self.upcast::<Node>();
if self.disabled_state() {
return;
}
for ancestor in node.ancestors() {
if !ancestor.is::<HTMLFieldSetElement>() {
continue;
}
if !ancestor.downcast::<Element>().unwrap().disabled_state() {
continue;
}
if ancestor.is_parent_of(node) {
self.set_disabled_state(true);
self.set_enabled_state(false);
return;
}
if let Some(ref legend) = ancestor.children().find(|n| n.is::<HTMLLegendElement>()) {
// XXXabinader: should we save previous ancestor to avoid this iteration?
if node.ancestors().any(|ancestor| ancestor == *legend) {
continue;
}
}
self.set_disabled_state(true);
self.set_enabled_state(false);
return;
}
}
pub fn check_parent_disabled_state_for_option(&self) {
if self.disabled_state() {
return;
}
let node = self.upcast::<Node>();
if let Some(ref parent) = node.GetParentNode() {
if parent.is::<HTMLOptGroupElement>() &&
parent.downcast::<Element>().unwrap().disabled_state() {
self.set_disabled_state(true);
self.set_enabled_state(false);
}
}
}
pub fn check_disabled_attribute(&self) {
let has_disabled_attrib = self.has_attribute(&local_name!("disabled"));
self.set_disabled_state(has_disabled_attrib);
self.set_enabled_state(!has_disabled_attrib);
}
}
#[derive(Clone, Copy)]
pub enum AttributeMutation<'a> {
/// The attribute is set, keep track of old value.
/// https://dom.spec.whatwg.org/#attribute-is-set
Set(Option<&'a AttrValue>),
/// The attribute is removed.
/// https://dom.spec.whatwg.org/#attribute-is-removed
Removed,
}
impl<'a> AttributeMutation<'a> {
pub fn is_removal(&self) -> bool {
match *self {
AttributeMutation::Removed => true,
AttributeMutation::Set(..) => false,
}
}
pub fn new_value<'b>(&self, attr: &'b Attr) -> Option<Ref<'b, AttrValue>> {
match *self {
AttributeMutation::Set(_) => Some(attr.value()),
AttributeMutation::Removed => None,
}
}
}
/// A holder for an element's "tag name", which will be lazily
/// resolved and cached. Should be reset when the document
/// owner changes.
#[derive(JSTraceable, HeapSizeOf)]
struct TagName {
ptr: DOMRefCell<Option<LocalName>>,
}
impl TagName {
fn new() -> TagName {
TagName { ptr: DOMRefCell::new(None) }
}
/// Retrieve a copy of the current inner value. If it is `None`, it is
/// initialized with the result of `cb` first.
fn or_init<F>(&self, cb: F) -> LocalName
where F: FnOnce() -> LocalName
{
match &mut *self.ptr.borrow_mut() {
&mut Some(ref name) => name.clone(),
ptr => {
let name = cb();
*ptr = Some(name.clone());
name
}
}
}
/// Clear the cached tag name, so that it will be re-calculated the
/// next time that `or_init()` is called.
fn clear(&self) {
*self.ptr.borrow_mut() = None;
}
}
pub struct ElementPerformFullscreenEnter {
element: Trusted<Element>,
promise: TrustedPromise,
error: bool,
}
impl ElementPerformFullscreenEnter {
pub fn new(element: Trusted<Element>, promise: TrustedPromise, error: bool) -> Box<ElementPerformFullscreenEnter> {
box ElementPerformFullscreenEnter {
element: element,
promise: promise,
error: error,
}
}
}
impl Runnable for ElementPerformFullscreenEnter {
fn name(&self) -> &'static str { "ElementPerformFullscreenEnter" }
#[allow(unrooted_must_root)]
fn handler(self: Box<ElementPerformFullscreenEnter>) {
let element = self.element.root();
let document = document_from_node(element.r());
// Step 7.1
if self.error || !element.fullscreen_element_ready_check() {
// JSAutoCompartment needs to be manually made.
// Otherwise, Servo will crash.
let promise = self.promise.root();
let promise_cx = promise.global().get_cx();
let _ac = JSAutoCompartment::new(promise_cx, promise.reflector().get_jsobject().get());
document.upcast::<EventTarget>().fire_event(atom!("fullscreenerror"));
promise.reject_error(promise.global().get_cx(), Error::Type(String::from("fullscreen is not connected")));
return
}
// TODO Step 7.2-4
// Step 7.5
element.set_fullscreen_state(true);
document.set_fullscreen_element(Some(&element));
document.window().reflow(ReflowGoal::ForDisplay,
ReflowQueryType::NoQuery,
ReflowReason::ElementStateChanged);
// Step 7.6
document.upcast::<EventTarget>().fire_event(atom!("fullscreenchange"));
// Step 7.7
// JSAutoCompartment needs to be manually made.
// Otherwise, Servo will crash.
let promise = self.promise.root();
let promise_cx = promise.global().get_cx();
let _ac = JSAutoCompartment::new(promise_cx, promise.reflector().get_jsobject().get());
promise.resolve(promise.global().get_cx(), HandleValue::undefined());
}
}
pub struct ElementPerformFullscreenExit {
element: Trusted<Element>,
promise: TrustedPromise,
}
impl ElementPerformFullscreenExit {
pub fn new(element: Trusted<Element>, promise: TrustedPromise) -> Box<ElementPerformFullscreenExit> {
box ElementPerformFullscreenExit {
element: element,
promise: promise,
}
}
}
impl Runnable for ElementPerformFullscreenExit {
fn name(&self) -> &'static str { "ElementPerformFullscreenExit" }
#[allow(unrooted_must_root)]
fn handler(self: Box<ElementPerformFullscreenExit>) {
let element = self.element.root();
let document = document_from_node(element.r());
// TODO Step 9.1-5
// Step 9.6
element.set_fullscreen_state(false);
document.window().reflow(ReflowGoal::ForDisplay,
ReflowQueryType::NoQuery,
ReflowReason::ElementStateChanged);
document.set_fullscreen_element(None);
// Step 9.8
document.upcast::<EventTarget>().fire_event(atom!("fullscreenchange"));
// Step 9.10
let promise = self.promise.root();
// JSAutoCompartment needs to be manually made.
// Otherwise, Servo will crash.
let promise_cx = promise.global().get_cx();
let _ac = JSAutoCompartment::new(promise_cx, promise.reflector().get_jsobject().get());
promise.resolve(promise.global().get_cx(), HandleValue::undefined());
}
}
pub fn reflect_cross_origin_attribute(element: &Element) -> Option<DOMString> {
let attr = element.get_attribute(&ns!(), &local_name!("crossorigin"));
if let Some(mut val) = attr.map(|v| v.Value()) {
val.make_ascii_lowercase();
if val == "anonymous" || val == "use-credentials" {
return Some(val);
}
return Some(DOMString::from("anonymous"));
}
None
}
pub fn set_cross_origin_attribute(element: &Element, value: Option<DOMString>) {
match value {
Some(val) => element.set_string_attribute(&local_name!("crossorigin"), val),
None => {
element.remove_attribute(&ns!(), &local_name!("crossorigin"));
}
}
}
pub fn cors_setting_for_element(element: &Element) -> Option<CorsSettings> {
reflect_cross_origin_attribute(element).map_or(None, |attr| {
match &*attr {
"anonymous" => Some(CorsSettings::Anonymous),
"use-credentials" => Some(CorsSettings::UseCredentials),
_ => unreachable!()
}
})
}
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