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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
/// Gecko's pseudo-element definition.
///
/// We intentionally double-box legacy ::-moz-tree pseudo-elements to keep the
/// size of PseudoElement (and thus selector components) small.
#[derive(Clone, Debug, Eq, Hash, MallocSizeOf, PartialEq, ToShmem)]
pub enum PseudoElement {
% for pseudo in PSEUDOS:
/// ${pseudo.value}
% if pseudo.is_tree_pseudo_element():
${pseudo.capitalized_pseudo()}(thin_vec::ThinVec<Atom>),
% elif pseudo.pseudo_ident == "highlight":
${pseudo.capitalized_pseudo()}(AtomIdent),
% else:
${pseudo.capitalized_pseudo()},
% endif
% endfor
/// ::-webkit-* that we don't recognize
UnknownWebkit(Atom),
}
/// Important: If you change this, you should also update Gecko's
/// nsCSSPseudoElements::IsEagerlyCascadedInServo.
<% EAGER_PSEUDOS = ["Before", "After", "FirstLine", "FirstLetter"] %>
<% TREE_PSEUDOS = [pseudo for pseudo in PSEUDOS if pseudo.is_tree_pseudo_element()] %>
<% SIMPLE_PSEUDOS = [pseudo for pseudo in PSEUDOS if pseudo.is_simple_pseudo_element()] %>
/// The number of eager pseudo-elements.
pub const EAGER_PSEUDO_COUNT: usize = ${len(EAGER_PSEUDOS)};
/// The number of non-functional pseudo-elements.
pub const SIMPLE_PSEUDO_COUNT: usize = ${len(SIMPLE_PSEUDOS)};
/// The number of tree pseudo-elements.
pub const TREE_PSEUDO_COUNT: usize = ${len(TREE_PSEUDOS)};
/// The number of all pseudo-elements.
pub const PSEUDO_COUNT: usize = ${len(PSEUDOS)};
/// The list of eager pseudos.
pub const EAGER_PSEUDOS: [PseudoElement; EAGER_PSEUDO_COUNT] = [
% for eager_pseudo_name in EAGER_PSEUDOS:
PseudoElement::${eager_pseudo_name},
% endfor
];
<%def name="pseudo_element_variant(pseudo, tree_arg='..')">\
PseudoElement::${pseudo.capitalized_pseudo()}${"({})".format(tree_arg) if not pseudo.is_simple_pseudo_element() else ""}\
</%def>
impl PseudoElement {
/// Returns an index of the pseudo-element.
#[inline]
pub fn index(&self) -> usize {
match *self {
% for i, pseudo in enumerate(PSEUDOS):
${pseudo_element_variant(pseudo)} => ${i},
% endfor
PseudoElement::UnknownWebkit(..) => unreachable!(),
}
}
/// Returns an array of `None` values.
///
/// FIXME(emilio): Integer generics can't come soon enough.
pub fn pseudo_none_array<T>() -> [Option<T>; PSEUDO_COUNT] {
[
${",\n ".join(["None" for pseudo in PSEUDOS])}
]
}
/// Whether this pseudo-element is an anonymous box.
#[inline]
pub fn is_anon_box(&self) -> bool {
match *self {
% for pseudo in PSEUDOS:
% if pseudo.is_anon_box():
${pseudo_element_variant(pseudo)} => true,
% endif
% endfor
_ => false,
}
}
/// Whether this pseudo-element is eagerly-cascaded.
#[inline]
pub fn is_eager(&self) -> bool {
matches!(*self,
${" | ".join(map(lambda name: "PseudoElement::{}".format(name), EAGER_PSEUDOS))})
}
/// Whether this pseudo-element is tree pseudo-element.
#[inline]
pub fn is_tree_pseudo_element(&self) -> bool {
match *self {
% for pseudo in TREE_PSEUDOS:
${pseudo_element_variant(pseudo)} => true,
% endfor
_ => false,
}
}
/// Whether this pseudo-element is an unknown Webkit-prefixed pseudo-element.
#[inline]
pub fn is_unknown_webkit_pseudo_element(&self) -> bool {
matches!(*self, PseudoElement::UnknownWebkit(..))
}
/// Gets the flags associated to this pseudo-element, or 0 if it's an
/// anonymous box.
pub fn flags(&self) -> u32 {
match *self {
% for pseudo in PSEUDOS:
${pseudo_element_variant(pseudo)} =>
% if pseudo.is_tree_pseudo_element():
structs::CSS_PSEUDO_ELEMENT_ENABLED_IN_UA_SHEETS_AND_CHROME,
% elif pseudo.is_anon_box():
structs::CSS_PSEUDO_ELEMENT_ENABLED_IN_UA_SHEETS,
% else:
structs::SERVO_CSS_PSEUDO_ELEMENT_FLAGS_${pseudo.pseudo_ident},
% endif
% endfor
PseudoElement::UnknownWebkit(..) => 0,
}
}
/// Construct a pseudo-element from a `PseudoStyleType`.
#[inline]
pub fn from_pseudo_type(type_: PseudoStyleType, functional_pseudo_parameter: Option<AtomIdent>) -> Option<Self> {
match type_ {
% for pseudo in PSEUDOS:
% if pseudo.is_simple_pseudo_element():
PseudoStyleType::${pseudo.pseudo_ident} => {
debug_assert!(functional_pseudo_parameter.is_none());
Some(${pseudo_element_variant(pseudo)})
},
% endif
% endfor
PseudoStyleType::highlight => {
match functional_pseudo_parameter {
Some(p) => Some(PseudoElement::Highlight(p)),
None => None
}
}
_ => None,
}
}
/// Construct a `PseudoStyleType` from a pseudo-element
#[inline]
pub fn pseudo_type(&self) -> PseudoStyleType {
match *self {
% for pseudo in PSEUDOS:
% if pseudo.is_tree_pseudo_element():
PseudoElement::${pseudo.capitalized_pseudo()}(..) => PseudoStyleType::XULTree,
% elif pseudo.pseudo_ident == "highlight":
PseudoElement::${pseudo.capitalized_pseudo()}(..) => PseudoStyleType::${pseudo.pseudo_ident},
% else:
PseudoElement::${pseudo.capitalized_pseudo()} => PseudoStyleType::${pseudo.pseudo_ident},
% endif
% endfor
PseudoElement::UnknownWebkit(..) => unreachable!(),
}
}
/// Get the argument list of a tree pseudo-element.
#[inline]
pub fn tree_pseudo_args(&self) -> Option<<&[Atom]> {
match *self {
% for pseudo in TREE_PSEUDOS:
PseudoElement::${pseudo.capitalized_pseudo()}(ref args) => Some(args),
% endfor
_ => None,
}
}
/// Construct a tree pseudo-element from atom and args.
#[inline]
pub fn from_tree_pseudo_atom(atom: &Atom, args: Box<[Atom]>) -> Option<Self> {
% for pseudo in PSEUDOS:
% if pseudo.is_tree_pseudo_element():
if atom == &atom!("${pseudo.value}") {
return Some(PseudoElement::${pseudo.capitalized_pseudo()}(args.into()));
}
% endif
% endfor
None
}
/// Constructs a pseudo-element from a string of text.
///
/// Returns `None` if the pseudo-element is not recognised.
#[inline]
pub fn from_slice(name: &str, allow_unkown_webkit: bool) -> Option<Self> {
// We don't need to support tree pseudos because functional
// pseudo-elements needs arguments, and thus should be created
// via other methods.
ascii_case_insensitive_phf_map! {
pseudo -> PseudoElement = {
% for pseudo in SIMPLE_PSEUDOS:
"${pseudo.value[1:]}" => ${pseudo_element_variant(pseudo)},
% endfor
// Alias some legacy prefixed pseudos to their standardized name at parse time:
"-moz-selection" => PseudoElement::Selection,
"-moz-placeholder" => PseudoElement::Placeholder,
"-moz-list-bullet" => PseudoElement::Marker,
"-moz-list-number" => PseudoElement::Marker,
}
}
if let Some(p) = pseudo::get(name) {
return Some(p.clone());
}
if starts_with_ignore_ascii_case(name, "-moz-tree-") {
return PseudoElement::tree_pseudo_element(name, Default::default())
}
const WEBKIT_PREFIX: &str = "-webkit-";
if allow_unkown_webkit && starts_with_ignore_ascii_case(name, WEBKIT_PREFIX) {
let part = string_as_ascii_lowercase(&name[WEBKIT_PREFIX.len()..]);
return Some(PseudoElement::UnknownWebkit(part.into()));
}
None
}
/// Constructs a tree pseudo-element from the given name and arguments.
/// "name" must start with "-moz-tree-".
///
/// Returns `None` if the pseudo-element is not recognized.
#[inline]
pub fn tree_pseudo_element(name: &str, args: thin_vec::ThinVec<Atom>) -> Option<Self> {
debug_assert!(starts_with_ignore_ascii_case(name, "-moz-tree-"));
let tree_part = &name[10..];
% for pseudo in TREE_PSEUDOS:
if tree_part.eq_ignore_ascii_case("${pseudo.value[11:]}") {
return Some(${pseudo_element_variant(pseudo, "args")});
}
% endfor
None
}
}
impl ToCss for PseudoElement {
fn to_css<W>(&self, dest: &mut W) -> fmt::Result where W: fmt::Write {
dest.write_char(':')?;
match *self {
% for pseudo in (p for p in PSEUDOS if p.pseudo_ident != "highlight"):
${pseudo_element_variant(pseudo)} => dest.write_str("${pseudo.value}")?,
% endfor
PseudoElement::Highlight(ref name) => {
dest.write_str(":highlight(")?;
serialize_atom_identifier(name, dest)?;
dest.write_char(')')?;
}
PseudoElement::UnknownWebkit(ref atom) => {
dest.write_str(":-webkit-")?;
serialize_atom_identifier(atom, dest)?;
}
}
if let Some(args) = self.tree_pseudo_args() {
if !args.is_empty() {
dest.write_char('(')?;
let mut iter = args.iter();
if let Some(first) = iter.next() {
serialize_atom_identifier(&first, dest)?;
for item in iter {
dest.write_str(", ")?;
serialize_atom_identifier(item, dest)?;
}
}
dest.write_char(')')?;
}
}
Ok(())
}
}