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servo/components/script/dom/element.rs

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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 app_units::Au;
use cssparser::{Color, ToCss};
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::WindowMethods;
use dom::bindings::codegen::Bindings::WindowBinding::{ScrollBehavior, ScrollToOptions};
use dom::bindings::codegen::UnionTypes::NodeOrString;
use dom::bindings::error::{Error, ErrorResult, Fallible};
use dom::bindings::global::GlobalRef;
use dom::bindings::inheritance::{Castable, ElementTypeId, HTMLElementTypeId, NodeTypeId};
use dom::bindings::js::{JS, LayoutJS, MutNullableHeap};
use dom::bindings::js::{Root, RootedReference};
use dom::bindings::str::DOMString;
use dom::bindings::xmlname::XMLName::InvalidXMLName;
use dom::bindings::xmlname::{namespace_from_domstring, validate_and_extract, xml_name_type};
use dom::characterdata::CharacterData;
use dom::create::create_element;
use dom::document::{Document, LayoutDocumentHelpers};
use dom::domrect::DOMRect;
use dom::domrectlist::DOMRectList;
use dom::domtokenlist::DOMTokenList;
use dom::event::Event;
use dom::htmlanchorelement::HTMLAnchorElement;
use dom::htmlbodyelement::{HTMLBodyElement, HTMLBodyElementLayoutHelpers};
use dom::htmlbuttonelement::HTMLButtonElement;
use dom::htmlcollection::HTMLCollection;
use dom::htmlelement::HTMLElement;
use dom::htmlfieldsetelement::HTMLFieldSetElement;
use dom::htmlfontelement::{HTMLFontElement, HTMLFontElementLayoutHelpers};
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::htmlobjectelement::HTMLObjectElement;
use dom::htmloptgroupelement::HTMLOptGroupElement;
use dom::htmlselectelement::HTMLSelectElement;
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::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::text::Text;
use dom::validation::Validatable;
use dom::virtualmethods::{VirtualMethods, vtable_for};
use html5ever::serialize;
use html5ever::serialize::SerializeOpts;
use html5ever::serialize::TraversalScope;
use html5ever::serialize::TraversalScope::{ChildrenOnly, IncludeNode};
use html5ever::tree_builder::{LimitedQuirks, NoQuirks, Quirks};
use ref_filter_map::ref_filter_map;
use selectors::matching::{DeclarationBlock, ElementFlags, matches};
use selectors::matching::{HAS_SLOW_SELECTOR, HAS_EDGE_CHILD_SELECTOR, HAS_SLOW_SELECTOR_LATER_SIBLINGS};
use selectors::parser::{AttrSelector, NamespaceConstraint, parse_author_origin_selector_list_from_str};
use std::ascii::AsciiExt;
use std::borrow::Cow;
use std::cell::{Cell, Ref};
use std::convert::TryFrom;
use std::default::Default;
use std::mem;
use std::sync::Arc;
use std::sync::atomic::{AtomicUsize, Ordering};
use string_cache::{Atom, Namespace, QualName};
use style::attr::{AttrValue, LengthOrPercentageOrAuto};
use style::element_state::*;
use style::matching::{common_style_affecting_attributes, rare_style_affecting_attributes};
use style::parser::ParserContextExtraData;
use style::properties::DeclaredValue;
use style::properties::longhands::{self, background_image, border_spacing, font_family, overflow_x, font_size};
use style::properties::{PropertyDeclaration, PropertyDeclarationBlock, parse_style_attribute};
use style::selector_impl::{NonTSPseudoClass, ServoSelectorImpl};
use style::sink::Push;
use style::values::CSSFloat;
use style::values::specified::{self, CSSColor, CSSRGBA, LengthOrPercentage};
// 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: Atom,
tag_name: TagName,
namespace: Namespace,
prefix: Option<DOMString>,
attrs: DOMRefCell<Vec<JS<Attr>>>,
id_attribute: DOMRefCell<Option<Atom>>,
style_attribute: DOMRefCell<Option<PropertyDeclarationBlock>>,
attr_list: MutNullableHeap<JS<NamedNodeMap>>,
class_list: MutNullableHeap<JS<DOMTokenList>>,
state: Cell<ElementState>,
atomic_flags: AtomicElementFlags,
}
#[derive(PartialEq, HeapSizeOf)]
pub enum ElementCreator {
ParserCreated,
ScriptCreated,
}
pub enum AdjacentPosition {
BeforeBegin,
AfterEnd,
AfterBegin,
BeforeEnd,
}
impl<'a> TryFrom<&'a str> for AdjacentPosition {
type Err = Error;
fn try_from(position: &'a str) -> Result<AdjacentPosition, Self::Err> {
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, prefix: Option<Atom>,
document: &Document, creator: ElementCreator)
-> Root<Element> {
create_element(name, prefix, document, creator)
}
pub fn new_inherited(local_name: Atom,
namespace: Namespace, prefix: Option<DOMString>,
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: Atom,
namespace: Namespace, prefix: Option<DOMString>,
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),
atomic_flags: AtomicElementFlags::new(),
}
}
pub fn new(local_name: Atom,
namespace: Namespace,
prefix: Option<DOMString>,
document: &Document) -> Root<Element> {
Node::reflect_node(
box Element::new_inherited(local_name, namespace, prefix, document),
document,
ElementBinding::Wrap)
}
// 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: &Atom)
-> Option<&'a AttrValue>;
unsafe fn get_attr_val_for_layout<'a>(&'a self, namespace: &Namespace, name: &Atom)
-> Option<&'a str>;
unsafe fn get_attr_vals_for_layout<'a>(&'a self, name: &Atom) -> Vec<&'a str>;
}
#[inline]
#[allow(unsafe_code)]
pub unsafe fn get_attr_for_layout<'a>(elem: &'a Element, namespace: &Namespace, name: &Atom)
-> 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: &Atom)
-> Option<&'a AttrValue> {
get_attr_for_layout(self, namespace, name).map(|attr| {
attr.value_forever()
})
}
unsafe fn get_attr_val_for_layout<'a>(&'a self, namespace: &Namespace, name: &Atom)
-> 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: &Atom) -> Vec<&'a str> {
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_ref_forever())
} else {
None
}
}).collect()
}
}
pub trait LayoutElementHelpers {
#[allow(unsafe_code)]
unsafe fn has_class_for_layout(&self, name: &Atom) -> 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<DeclarationBlock<Vec<PropertyDeclaration>>>;
#[allow(unsafe_code)]
unsafe fn get_colspan(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<PropertyDeclarationBlock>;
fn local_name(&self) -> &Atom;
fn namespace(&self) -> &Namespace;
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_atomic_flags(&self, flags: ElementFlags);
}
impl LayoutElementHelpers for LayoutJS<Element> {
#[allow(unsafe_code)]
#[inline]
unsafe fn has_class_for_layout(&self, name: &Atom) -> bool {
get_attr_for_layout(&*self.unsafe_get(), &ns!(), &atom!("class")).map_or(false, |attr| {
attr.value_tokens_forever().unwrap().iter().any(|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!(), &atom!("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<DeclarationBlock<Vec<PropertyDeclaration>>>
{
#[inline]
fn from_declaration(rule: PropertyDeclaration) -> DeclarationBlock<Vec<PropertyDeclaration>> {
DeclarationBlock::from_declarations(Arc::new(vec![rule]))
}
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(
PropertyDeclaration::BackgroundColor(DeclaredValue::Value(
CSSColor { parsed: Color::RGBA(color), authored: None }))));
}
let background = if let Some(this) = self.downcast::<HTMLBodyElement>() {
this.get_background()
} else {
None
};
if let Some(url) = background {
hints.push(from_declaration(
PropertyDeclaration::BackgroundImage(DeclaredValue::Value(
background_image::SpecifiedValue(Some(
specified::Image::Url(url, specified::UrlExtraData { })))))));
}
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(
PropertyDeclaration::Color(DeclaredValue::Value(CSSRGBA {
parsed: color,
authored: None,
}))));
}
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(
PropertyDeclaration::FontFamily(
DeclaredValue::Value(
font_family::computed_value::T(vec![
font_family::computed_value::FontFamily::from_atom(
font_family)])))));
}
let font_size = if let Some(this) = self.downcast::<HTMLFontElement>() {
this.get_size()
} else {
None
};
if let Some(font_size) = font_size {
hints.push(from_declaration(
PropertyDeclaration::FontSize(
DeclaredValue::Value(
font_size::SpecifiedValue(
LengthOrPercentage::Length(font_size))))))
}
let cellspacing = if let Some(this) = self.downcast::<HTMLTableElement>() {
this.get_cellspacing()
} else {
None
};
if let Some(cellspacing) = cellspacing {
let width_value = specified::Length::Absolute(Au::from_px(cellspacing as i32));
hints.push(from_declaration(
PropertyDeclaration::BorderSpacing(DeclaredValue::Value(
border_spacing::SpecifiedValue {
horizontal: width_value,
vertical: width_value,
}))));
}
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!(), &atom!("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::Length::ServoCharacterWidth(specified::CharacterWidth(size));
hints.push(from_declaration(
PropertyDeclaration::Width(DeclaredValue::Value(
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 {
LengthOrPercentageOrAuto::Auto
};
match width {
LengthOrPercentageOrAuto::Auto => {}
LengthOrPercentageOrAuto::Percentage(percentage) => {
let width_value =
specified::LengthOrPercentageOrAuto::Percentage(specified::Percentage(percentage));
hints.push(from_declaration(
PropertyDeclaration::Width(DeclaredValue::Value(width_value))));
}
LengthOrPercentageOrAuto::Length(length) => {
let width_value = specified::LengthOrPercentageOrAuto::Length(
specified::Length::Absolute(length));
hints.push(from_declaration(
PropertyDeclaration::Width(DeclaredValue::Value(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 {
LengthOrPercentageOrAuto::Auto
};
match height {
LengthOrPercentageOrAuto::Auto => {}
LengthOrPercentageOrAuto::Percentage(percentage) => {
let height_value =
specified::LengthOrPercentageOrAuto::Percentage(specified::Percentage(percentage));
hints.push(from_declaration(
PropertyDeclaration::Height(DeclaredValue::Value(height_value))));
}
LengthOrPercentageOrAuto::Length(length) => {
let height_value = specified::LengthOrPercentageOrAuto::Length(
specified::Length::Absolute(length));
hints.push(from_declaration(
PropertyDeclaration::Height(DeclaredValue::Value(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::Length::ServoCharacterWidth(specified::CharacterWidth(cols));
hints.push(from_declaration(
PropertyDeclaration::Width(DeclaredValue::Value(
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::Length::FontRelative(specified::FontRelativeLength::Em(rows as CSSFloat));
hints.push(from_declaration(
PropertyDeclaration::Height(DeclaredValue::Value(
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::Length::Absolute(Au::from_px(border as i32));
hints.push(from_declaration(
PropertyDeclaration::BorderTopWidth(DeclaredValue::Value(
longhands::border_top_width::SpecifiedValue(width_value)))));
hints.push(from_declaration(
PropertyDeclaration::BorderLeftWidth(DeclaredValue::Value(
longhands::border_left_width::SpecifiedValue(width_value)))));
hints.push(from_declaration(
PropertyDeclaration::BorderBottomWidth(DeclaredValue::Value(
longhands::border_bottom_width::SpecifiedValue(width_value)))));
hints.push(from_declaration(
PropertyDeclaration::BorderRightWidth(DeclaredValue::Value(
longhands::border_right_width::SpecifiedValue(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
}
}
#[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<PropertyDeclarationBlock> {
unsafe {
(*self.unsafe_get()).style_attribute.borrow_for_layout()
}
}
#[allow(unsafe_code)]
fn local_name(&self) -> &Atom {
unsafe {
&(*self.unsafe_get()).local_name
}
}
#[allow(unsafe_code)]
fn namespace(&self) -> &Namespace {
unsafe {
&(*self.unsafe_get()).namespace
}
}
#[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_atomic_flags(&self, flags: ElementFlags) {
unsafe {
(*self.unsafe_get()).atomic_flags.insert(flags);
}
}
}
#[derive(PartialEq, Eq, Copy, Clone, HeapSizeOf)]
pub enum StylePriority {
Important,
Normal,
}
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) -> &Atom {
&self.local_name
}
pub fn parsed_name(&self, mut name: DOMString) -> Atom {
if self.html_element_in_html_document() {
name.make_ascii_lowercase();
}
Atom::from(name)
}
pub fn namespace(&self) -> &Namespace {
&self.namespace
}
pub fn prefix(&self) -> &Option<DOMString> {
&self.prefix
}
pub fn attrs(&self) -> Ref<Vec<JS<Attr>>> {
self.attrs.borrow()
}
pub fn style_attribute(&self) -> &DOMRefCell<Option<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 */
atom!("area") | atom!("base") | atom!("basefont") | atom!("bgsound") | atom!("br") |
atom!("col") | atom!("embed") | atom!("frame") | atom!("hr") | atom!("img") |
atom!("input") | atom!("keygen") | atom!("link") | atom!("menuitem") | atom!("meta") |
atom!("param") | atom!("source") | atom!("track") | atom!("wbr") => true,
_ => false
}
}
// this sync method is called upon modification of the style_attribute property,
// therefore, it should not trigger subsequent mutation events
pub fn sync_property_with_attrs_style(&self) {
let style_str = if let &Some(ref declarations) = &*self.style_attribute().borrow() {
declarations.to_css_string()
} else {
String::new()
};
let mut new_style = AttrValue::String(style_str);
if let Some(style_attr) = self.attrs.borrow().iter().find(|a| a.name() == &atom!("style")) {
style_attr.swap_value(&mut new_style);
return;
}
// explicitly not calling the push_new_attribute convenience method
// in order to avoid triggering mutation events
let window = window_from_node(self);
let attr = Attr::new(&window,
atom!("style"),
new_style,
atom!("style"),
ns!(),
Some(atom!("style")),
Some(self));
assert!(attr.GetOwnerElement().r() == Some(self));
self.attrs.borrow_mut().push(JS::from_ref(&attr));
}
pub fn remove_inline_style_property(&self, property: &str) {
fn remove(element: &Element, property: &str) {
let mut inline_declarations = element.style_attribute.borrow_mut();
if let &mut Some(ref mut declarations) = &mut *inline_declarations {
let index = declarations.normal
.iter()
.position(|decl| decl.matches(property));
if let Some(index) = index {
Arc::make_mut(&mut declarations.normal).remove(index);
return;
}
let index = declarations.important
.iter()
.position(|decl| decl.matches(property));
if let Some(index) = index {
Arc::make_mut(&mut declarations.important).remove(index);
return;
}
}
}
remove(self, property);
self.sync_property_with_attrs_style();
}
pub fn update_inline_style(&self,
declarations: Vec<PropertyDeclaration>,
style_priority: StylePriority) {
fn update(element: &Element, mut declarations: Vec<PropertyDeclaration>, style_priority: StylePriority) {
let mut inline_declarations = element.style_attribute().borrow_mut();
if let &mut Some(ref mut existing_declarations) = &mut *inline_declarations {
let existing_declarations = if style_priority == StylePriority::Important {
&mut existing_declarations.important
} else {
&mut existing_declarations.normal
};
// Usually, the reference count will be 1 here. But transitions could make it greater
// than that.
let existing_declarations = Arc::make_mut(existing_declarations);
while let Some(mut incoming_declaration) = declarations.pop() {
let mut replaced = false;
for existing_declaration in &mut *existing_declarations {
if existing_declaration.name() == incoming_declaration.name() {
mem::swap(existing_declaration, &mut incoming_declaration);
replaced = true;
break;
}
}
if !replaced {
// inserting instead of pushing since the declarations are in reverse order
existing_declarations.insert(0, incoming_declaration);
}
}
return;
}
let (important, normal) = if style_priority == StylePriority::Important {
(declarations, vec![])
} else {
(vec![], declarations)
};
*inline_declarations = Some(PropertyDeclarationBlock {
important: Arc::new(important),
normal: Arc::new(normal),
});
}
update(self, declarations, style_priority);
self.sync_property_with_attrs_style();
}
pub fn set_inline_style_property_priority(&self,
properties: &[&str],
style_priority: StylePriority) {
{
let mut inline_declarations = self.style_attribute().borrow_mut();
if let &mut Some(ref mut declarations) = &mut *inline_declarations {
let (from, to) = if style_priority == StylePriority::Important {
(&mut declarations.normal, &mut declarations.important)
} else {
(&mut declarations.important, &mut declarations.normal)
};
// Usually, the reference counts of `from` and `to` will be 1 here. But transitions
// could make them greater than that.
let from = Arc::make_mut(from);
let to = Arc::make_mut(to);
let mut new_from = Vec::new();
for declaration in from.drain(..) {
let name = declaration.name();
if properties.iter().any(|p| name == **p) {
to.push(declaration)
} else {
new_from.push(declaration)
}
}
mem::replace(from, new_from);
}
}
self.sync_property_with_attrs_style();
}
pub fn get_inline_style_declaration(&self,
property: &Atom)
-> Option<Ref<PropertyDeclaration>> {
ref_filter_map(self.style_attribute.borrow(), |inline_declarations| {
inline_declarations.as_ref().and_then(|declarations| {
declarations.normal
.iter()
.chain(declarations.important.iter())
.find(|decl| decl.matches(&property))
})
})
}
pub fn get_important_inline_style_declaration(&self,
property: &Atom)
-> Option<Ref<PropertyDeclaration>> {
ref_filter_map(self.style_attribute.borrow(), |inline_declarations| {
inline_declarations.as_ref().and_then(|declarations| {
declarations.important
.iter()
.find(|decl| decl.matches(&property))
})
})
}
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(atom!("xmlns")) &&
**attr.value() == *namespace.0 {
return Some(attr.LocalName());
}
}
},
None => return None,
}
}
None
}
}
impl Element {
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,
}
}
}
impl Element {
pub fn push_new_attribute(&self,
local_name: Atom,
value: AttrValue,
name: Atom,
namespace: Namespace,
prefix: Option<Atom>) {
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) {
assert!(attr.GetOwnerElement().r() == Some(self));
self.will_mutate_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: &Atom) -> 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<Atom>) {
// 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);
Atom::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: &Atom, 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 = Atom::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: Atom,
value: AttrValue,
name: Atom,
namespace: Namespace,
prefix: Option<Atom>,
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: &Atom,
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: &Atom) -> 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: &Atom) -> 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| {
self.will_mutate_attr();
let attr = Root::from_ref(&*(*self.attrs.borrow())[idx]);
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) -> bool {
let quirks_mode = document_from_node(self).quirks_mode();
let is_equal = |lhs: &Atom, rhs: &Atom| {
match quirks_mode {
NoQuirks | LimitedQuirks => lhs == rhs,
Quirks => lhs.eq_ignore_ascii_case(&rhs),
}
};
self.get_attribute(&ns!(), &atom!("class"))
.map_or(false, |attr| attr.value().as_tokens().iter().any(|atom| is_equal(name, atom)))
}
pub fn set_atomic_attribute(&self, local_name: &Atom, 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: &Atom) -> 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: &Atom, 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: &Atom) -> 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: &Atom, value: DOMString) {
self.set_string_attribute(local_name, value);
}
pub fn get_string_attribute(&self, local_name: &Atom) -> DOMString {
match self.get_attribute(&ns!(), local_name) {
Some(x) => x.Value(),
None => DOMString::new(),
}
}
pub fn set_string_attribute(&self, local_name: &Atom, 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: &Atom) -> Vec<Atom> {
self.get_attribute(&ns!(), local_name).map(|attr| {
attr.r()
.value()
.as_tokens()
.to_vec()
}).unwrap_or(vec!())
}
pub fn set_tokenlist_attribute(&self, local_name: &Atom, 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: &Atom, 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: &Atom, 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.r().value() {
AttrValue::Int(_, value) => value,
_ => panic!("Expected an AttrValue::Int: \
implement parse_plain_attribute"),
}
}
None => default,
}
}
pub fn set_int_attribute(&self, local_name: &Atom, 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: &Atom, 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: &Atom, 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) {
let node = self.upcast::<Node>();
node.owner_doc().element_attr_will_change(self);
}
// 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() != Quirks {
win.scroll(x, y, behavior);
}
return;
}
// Step 9
if doc.GetBody().r() == self.downcast::<HTMLElement>() &&
doc.quirks_mode() == Quirks &&
!self.potentially_scrollable() {
win.scroll(x, y, behavior);
return;
}
// Step 10 (TODO)
// Step 11
win.scroll_node(node.to_trusted_node_address(), x, y, behavior);
}
}
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 Atom to DOMString
DOMString::from(&*self.local_name)
}
// https://dom.spec.whatwg.org/#dom-element-prefix
fn GetPrefix(&self) -> Option<DOMString> {
self.prefix.clone()
}
// 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() {
Atom::from(qualified_name.to_ascii_uppercase())
} else {
Atom::from(qualified_name)
}
});
DOMString::from(&*name)
}
// https://dom.spec.whatwg.org/#dom-element-id
fn Id(&self) -> DOMString {
self.get_string_attribute(&atom!("id"))
}
// https://dom.spec.whatwg.org/#dom-element-id
fn SetId(&self, id: DOMString) {
self.set_atomic_attribute(&atom!("id"), id);
}
// https://dom.spec.whatwg.org/#dom-element-classname
fn ClassName(&self) -> DOMString {
self.get_string_attribute(&atom!("class"))
}
// https://dom.spec.whatwg.org/#dom-element-classname
fn SetClassName(&self, class: DOMString) {
self.set_tokenlist_attribute(&atom!("class"), class);
}
// https://dom.spec.whatwg.org/#dom-element-classlist
fn ClassList(&self) -> Root<DOMTokenList> {
self.class_list.or_init(|| DOMTokenList::new(self, &atom!("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, &Atom::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) =
try!(validate_and_extract(namespace, &qualified_name));
let qualified_name = Atom::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>>> {
// 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.r() == attr {
return Ok(Some(Root::from_ref(attr)));
}
// Step 4.
self.will_mutate_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 = Atom::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_tag_name(window.r(), self.upcast(), 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.r(), 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.r(), self.upcast(), classes)
}
// https://drafts.csswg.org/cssom-view/#dom-element-getclientrects
fn GetClientRects(&self) -> Root<DOMRectList> {
let win = window_from_node(self);
let raw_rects = self.upcast::<Node>().content_boxes();
let rects = raw_rects.iter().map(|rect| {
DOMRect::new(GlobalRef::Window(win.r()),
rect.origin.x.to_f64_px(),
rect.origin.y.to_f64_px(),
rect.size.width.to_f64_px(),
rect.size.height.to_f64_px())
});
DOMRectList::new(win.r(), rects)
}
// 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();
DOMRect::new(GlobalRef::Window(win.r()),
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() == Quirks {
return 0.0;
}
// Step 6
return win.ScrollY() as f64;
}
// Step 7
if doc.GetBody().r() == self.downcast::<HTMLElement>() &&
doc.quirks_mode() == 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() != Quirks {
win.scroll(win.ScrollX() as f64, y, behavior);
}
return;
}
// Step 9
if doc.GetBody().r() == self.downcast::<HTMLElement>() &&
doc.quirks_mode() == Quirks &&
!self.potentially_scrollable() {
win.scroll(win.ScrollX() as f64, y, behavior);
return;
}
// Step 10 (TODO)
// Step 11
win.scroll_node(node.to_trusted_node_address(), 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() != Quirks {
// Step 6
return win.ScrollX() as f64;
}
return 0.0;
}
// Step 7
if doc.GetBody().r() == self.downcast::<HTMLElement>() &&
doc.quirks_mode() == 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() == Quirks {
return;
}
win.scroll(x, win.ScrollY() as f64, behavior);
return;
}
// Step 9
if doc.GetBody().r() == self.downcast::<HTMLElement>() &&
doc.quirks_mode() == Quirks &&
!self.potentially_scrollable() {
win.scroll(x, win.ScrollY() as f64, behavior);
return;
}
// Step 10 (TODO)
// Step 11
win.scroll_node(node.to_trusted_node_address(), 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 {
let context_node = self.upcast::<Node>();
// Step 1.
let frag = try!(context_node.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(context_node)
};
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://dvcs.w3.org/hg/innerhtml/raw-file/tip/index.html#widl-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(ns!(html), atom!("body")),
None, context_document.r(),
ElementCreator::ScriptCreated);
Root::upcast(body_elem)
},
_ => context_node.GetParentNode().unwrap()
};
// Step 5.
let frag = try!(parent.parse_fragment(value));
// Step 6.
try!(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.r(), 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 parse_author_origin_selector_list_from_str(&selectors) {
Err(()) => Err(Error::Syntax),
Ok(ref selectors) => {
Ok(matches(selectors, &Root::from_ref(self), None))
}
}
}
// 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 parse_author_origin_selector_list_from_str(&selectors) {
Err(()) => Err(Error::Syntax),
Ok(ref selectors) => {
let root = self.upcast::<Node>();
for element in root.inclusive_ancestors() {
if let Some(element) = Root::downcast::<Element>(element) {
if matches(selectors, &element, None) {
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_ = try!(AdjacentPosition::try_from(&*where_));
let inserted_node = try!(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_ = try!(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 = try!(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 = match context.downcast::<Element>() {
Some(elem) if elem.local_name() != &atom!("html") ||
!elem.html_element_in_html_document() => Root::from_ref(elem),
_ => Root::upcast(HTMLBodyElement::new(atom!("body"), None, &*context.owner_doc())),
};
// Step 3.
let fragment = try!(context.upcast::<Node>().parse_fragment(text));
// Step 4.
self.insert_adjacent(position, fragment.upcast()).map(|_| ())
}
}
pub fn fragment_affecting_attributes() -> [Atom; 3] {
[atom!("width"), atom!("height"), atom!("src")]
}
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() {
&atom!("style") => {
// Modifying the `style` attribute might change style.
*self.style_attribute.borrow_mut() =
mutation.new_value(attr).map(|value| {
let win = window_from_node(self);
parse_style_attribute(&value, &doc.base_url(), win.css_error_reporter(),
ParserContextExtraData::default())
});
if node.is_in_doc() {
node.dirty(NodeDamage::NodeStyleDamaged);
}
},
&atom!("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);
}
}
}
}
},
_ if attr.namespace() == &ns!() => {
if fragment_affecting_attributes().iter().any(|a| a == attr.local_name()) ||
common_style_affecting_attributes().iter().any(|a| &a.atom == attr.local_name()) ||
rare_style_affecting_attributes().iter().any(|a| a == attr.local_name())
{
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: &Atom, value: DOMString) -> AttrValue {
match name {
&atom!("id") => AttrValue::from_atomic(value.into()),
&atom!("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 !tree_in_doc {
return;
}
if let Some(ref value) = *self.id_attribute.borrow() {
let doc = document_from_node(self);
doc.register_named_element(self, value.clone());
}
}
fn unbind_from_tree(&self, context: &UnbindContext) {
self.super_type().unwrap().unbind_from_tree(context);
if !context.tree_in_doc {
return;
}
if let Some(ref value) = *self.id_attribute.borrow() {
let doc = document_from_node(self);
doc.unregister_named_element(self, value.clone());
}
}
fn children_changed(&self, mutation: &ChildrenMutation) {
if let Some(ref s) = self.super_type() {
s.children_changed(mutation);
}
let flags = self.atomic_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::MatchAttrGeneric for Root<Element> {
type Impl = ServoSelectorImpl;
fn match_attr<F>(&self, attr: &AttrSelector<ServoSelectorImpl>, test: F) -> bool
where F: Fn(&str) -> bool
{
use ::selectors::Element;
let local_name = {
if self.is_html_element_in_html_document() {
&attr.lower_name
} else {
&attr.name
}
};
match attr.namespace {
NamespaceConstraint::Specific(ref ns) => {
self.get_attribute(&ns.url, local_name)
.map_or(false, |attr| {
test(&attr.value())
})
},
NamespaceConstraint::Any => {
self.attrs.borrow().iter().any(|attr| {
attr.local_name() == local_name && test(&attr.value())
})
}
}
}
}
impl<'a> ::selectors::Element for Root<Element> {
fn parent_element(&self) -> Option<Root<Element>> {
self.upcast::<Node>().GetParentElement()
}
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 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) -> &Atom {
self.local_name()
}
fn get_namespace(&self) -> &Namespace {
self.namespace()
}
fn match_non_ts_pseudo_class(&self, pseudo_class: NonTSPseudoClass) -> bool {
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::ReadOnly =>
!Element::state(self).contains(pseudo_class.state_flag()),
NonTSPseudoClass::Active |
NonTSPseudoClass::Focus |
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 get_id(&self) -> Option<Atom> {
self.id_attribute.borrow().clone()
}
fn has_class(&self, name: &Atom) -> bool {
Element::has_class(&**self, name)
}
fn each_class<F>(&self, mut callback: F)
where F: FnMut(&Atom)
{
if let Some(ref attr) = self.get_attribute(&ns!(), &atom!("class")) {
let tokens = attr.value();
let tokens = tokens.as_tokens();
for token in tokens {
callback(token);
}
}
}
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
}
})
}
// 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
}
}
}
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(&atom!("href"))
},
_ => false,
}
}
/// 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);
}
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)
}
}
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() {
let ancestor = ancestor;
let ancestor = ancestor.r();
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;
}
match ancestor.children()
.find(|child| child.is::<HTMLLegendElement>()) {
Some(ref legend) => {
// XXXabinader: should we save previous ancestor to avoid this iteration?
if node.ancestors().any(|ancestor| ancestor == *legend) {
continue;
}
},
None => (),
}
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(&atom!("disabled"));
self.set_disabled_state(has_disabled_attrib);
self.set_enabled_state(!has_disabled_attrib);
}
}
#[derive(Clone, Copy, PartialEq)]
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 new_value<'b>(&self, attr: &'b Attr) -> Option<Ref<'b, AttrValue>> {
match *self {
AttributeMutation::Set(_) => Some(attr.value()),
AttributeMutation::Removed => None,
}
}
}
/// Thread-safe wrapper for ElementFlags set during selector matching
#[derive(JSTraceable, HeapSizeOf)]
struct AtomicElementFlags(AtomicUsize);
impl AtomicElementFlags {
fn new() -> Self {
AtomicElementFlags(AtomicUsize::new(0))
}
fn get(&self) -> ElementFlags {
ElementFlags::from_bits_truncate(self.0.load(Ordering::Relaxed) as u8)
}
fn insert(&self, flags: ElementFlags) {
self.0.fetch_or(flags.bits() as usize, Ordering::Relaxed);
}
}
/// 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<Atom>>,
}
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) -> Atom
where F: FnOnce() -> Atom
{
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;
}
}
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