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servo/components/script/dom/element.rs
Bobby Holley 384cdfcfff Hoist ParseErrorReporter into style and remove the dependency on msg. 
The pipeline id stuff is currently unused. If someone needs it, they can add
an additional trait bound on their css error reporter to get the pipeline id.
2016-01-11 18:01:48 -08:00

2018 lines
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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;
use devtools_traits::AttrInfo;
use dom::activation::Activatable;
use dom::attr::AttrValue;
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::HTMLInputElementBinding::HTMLInputElementMethods;
use dom::bindings::codegen::Bindings::HTMLTemplateElementBinding::HTMLTemplateElementMethods;
use dom::bindings::codegen::Bindings::NodeBinding::NodeMethods;
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::trace::JSTraceable;
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::htmlfieldsetelement::HTMLFieldSetElement;
use dom::htmlfontelement::{HTMLFontElement, HTMLFontElementLayoutHelpers};
use dom::htmlhrelement::{HTMLHRElement, HTMLHRLayoutHelpers};
use dom::htmliframeelement::{HTMLIFrameElement, HTMLIFrameElementLayoutMethods};
use dom::htmlinputelement::{HTMLInputElement, LayoutHTMLInputElementHelpers};
use dom::htmllabelelement::HTMLLabelElement;
use dom::htmllegendelement::HTMLLegendElement;
use dom::htmloptgroupelement::HTMLOptGroupElement;
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, 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::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 selectors::matching::{DeclarationBlock, matches};
use selectors::matching::{common_style_affecting_attributes, rare_style_affecting_attributes};
use selectors::parser::{AttrSelector, NamespaceConstraint, parse_author_origin_selector_list_from_str};
use selectors::states::*;
use smallvec::VecLike;
use std::ascii::AsciiExt;
use std::borrow::Cow;
use std::cell::{Cell, Ref};
use std::default::Default;
use std::mem;
use std::sync::Arc;
use string_cache::{Atom, Namespace, QualName};
use style::error_reporting::ParseErrorReporter;
use style::properties::DeclaredValue;
use style::properties::longhands::{self, background_image, border_spacing, font_family, font_size};
use style::properties::{PropertyDeclaration, PropertyDeclarationBlock, parse_style_attribute};
use style::values::CSSFloat;
use style::values::specified::{self, CSSColor, CSSRGBA, LengthOrPercentage};
use util::mem::HeapSizeOf;
use util::str::{DOMString, LengthOrPercentageOrAuto};
// 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,
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>,
}
#[derive(PartialEq, HeapSizeOf)]
pub enum ElementCreator {
ParserCreated,
ScriptCreated,
}
//
// 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,
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),
}
}
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)
}
}
#[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: VecLike<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;
}
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: VecLike<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)))))));
}
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.get_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::<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 {
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.get_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.get_indeterminate_state_for_layout()
},
None => false,
}
}
#[inline]
#[allow(unsafe_code)]
fn get_state_for_layout(&self) -> ElementState {
unsafe {
(*self.unsafe_get()).state.get()
}
}
}
#[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
}
}
pub fn remove_inline_style_property(&self, property: &str) {
let mut inline_declarations = self.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;
}
}
}
pub fn update_inline_style(&self,
property_decl: PropertyDeclaration,
style_priority: StylePriority) {
let mut inline_declarations = self.style_attribute().borrow_mut();
if let &mut Some(ref mut declarations) = &mut *inline_declarations {
let existing_declarations = if style_priority == StylePriority::Important {
&mut declarations.important
} else {
&mut 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);
for declaration in &mut *existing_declarations {
if declaration.name() == property_decl.name() {
*declaration = property_decl;
return;
}
}
existing_declarations.push(property_decl);
return;
}
let (important, normal) = if style_priority == StylePriority::Important {
(vec![property_decl], vec![])
} else {
(vec![], vec![property_decl])
};
*inline_declarations = Some(PropertyDeclarationBlock {
important: Arc::new(important),
normal: Arc::new(normal),
});
}
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);
}
}
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"),
}
}
// https://html.spec.whatwg.org/multipage/#root-element
pub fn get_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.get_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>) {
self.will_mutate_attr();
let window = window_from_node(self);
let in_empty_ns = namespace == ns!();
let attr = Attr::new(&window,
local_name,
value,
name,
namespace,
prefix,
Some(self));
self.attrs.borrow_mut().push(JS::from_rooted(&attr));
if in_empty_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)
}
}
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);
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.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.serialize()),
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));
}
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));
}
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(DOMString::from(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());
// FIXME(ajeffrey): Directly convert u32 to DOMString
self.set_attribute(local_name,
AttrValue::UInt(DOMString::from(value.to_string()), value));
}
pub fn will_mutate_attr(&self) {
let node = self.upcast::<Node>();
node.owner_doc().element_attr_will_change(self);
}
}
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 qualified_name = match self.prefix {
Some(ref prefix) => {
Cow::Owned(format!("{}:{}", &**prefix, &*self.local_name))
},
None => Cow::Borrowed(&*self.local_name)
};
DOMString::from(if self.html_element_in_html_document() {
qualified_name.to_ascii_uppercase()
} else {
qualified_name.into_owned()
})
}
// 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-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-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-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>().get_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>().get_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-clienttop
fn ClientTop(&self) -> i32 {
self.upcast::<Node>().get_client_rect().origin.y
}
// https://drafts.csswg.org/cssom-view/#dom-element-clientleft
fn ClientLeft(&self) -> i32 {
self.upcast::<Node>().get_client_rect().origin.x
}
// https://drafts.csswg.org/cssom-view/#dom-element-clientwidth
fn ClientWidth(&self) -> i32 {
self.upcast::<Node>().get_client_rect().size.width
}
// https://drafts.csswg.org/cssom-view/#dom-element-clientheight
fn ClientHeight(&self) -> i32 {
self.upcast::<Node>().get_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) -> Fallible<()> {
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) -> Fallible<()> {
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)
}
}
}
}
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())
});
if node.is_in_doc() {
doc.content_changed(node, 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())
{
doc.content_changed(node, 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),
&atom!("class") => AttrValue::from_serialized_tokenlist(value),
_ => 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());
}
}
}
macro_rules! state_getter {
($(
$(#[$Flag_attr: meta])*
state $css: expr => $variant: ident / $method: ident /
$flag: ident = $value: expr,
)+) => {
$( fn $method(&self) -> bool { Element::get_state(self).contains($flag) } )+
}
}
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 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,
}
}
#[inline]
fn is_unvisited_link(&self) -> bool {
self.is_link()
}
#[inline]
fn is_visited_link(&self) -> bool {
// https://github.com/servo/servo/issues/8718
false
}
fn get_local_name(&self) -> &Atom {
self.local_name()
}
fn get_namespace(&self) -> &Namespace {
self.namespace()
}
state_pseudo_classes!(state_getter);
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 has_servo_nonzero_border(&self) -> bool {
match self.downcast::<HTMLTableElement>() {
None => false,
Some(this) => {
match this.get_border() {
None | Some(0) => false,
Some(_) => true,
}
}
}
}
fn match_attr<F>(&self, attr: &AttrSelector, test: F) -> bool
where F: Fn(&str) -> bool
{
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, 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())
})
}
}
}
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 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);
}
pub fn get_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 get_active_state(&self) -> bool {
self.state.get().contains(IN_ACTIVE_STATE)
}
pub fn set_active_state(&self, value: bool) {
self.set_state(IN_ACTIVE_STATE, value)
}
pub fn get_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);
let doc = document_from_node(self);
doc.content_changed(self.upcast(), NodeDamage::OtherNodeDamage);
}
pub fn get_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 get_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 get_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)
}
}
impl Element {
pub fn check_ancestors_disabled_state_for_form_control(&self) {
let node = self.upcast::<Node>();
if self.get_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().get_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.get_disabled_state() {
return;
}
let node = self.upcast::<Node>();
if let Some(ref parent) = node.GetParentNode() {
if parent.is::<HTMLOptGroupElement>() &&
parent.downcast::<Element>().unwrap().get_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,
}
}
}
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