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style: Add FFI function to parse a @counter-style descriptor.

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This commit is contained in:
Cameron McCormack 2017-11-24 16:48:12 +08:00
parent 374f0091c1
commit c49554d4c4
2 changed files with 60 additions and 1 deletions
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26
components/style/counter_style/mod.rs
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@ -11,7 +11,7 @@ use cssparser::{AtRuleParser, DeclarationListParser, DeclarationParser};
use cssparser::{Parser, Token, serialize_identifier, CowRcStr};
use error_reporting::{ContextualParseError, ParseErrorReporter};
#[cfg(feature = "gecko")] use gecko::rules::CounterStyleDescriptors;
#[cfg(feature = "gecko")] use gecko_bindings::structs::nsCSSCounterDesc;
#[cfg(feature = "gecko")] use gecko_bindings::structs::{ nsCSSCounterDesc, nsCSSValue };
use parser::{ParserContext, ParserErrorContext, Parse};
use selectors::parser::SelectorParseErrorKind;
use shared_lock::{SharedRwLockReadGuard, ToCssWithGuard};
@ -243,6 +243,30 @@ macro_rules! counter_style_descriptors {
dest.write_str("}")
}
}
/// Parse a descriptor into an `nsCSSValue`.
#[cfg(feature = "gecko")]
pub fn parse_counter_style_descriptor<'i, 't>(
context: &ParserContext,
input: &mut Parser<'i, 't>,
descriptor: nsCSSCounterDesc,
value: &mut nsCSSValue
) -> Result<(), ParseError<'i>> {
match descriptor {
$(
nsCSSCounterDesc::$gecko_ident => {
let v: $ty =
input.parse_entirely(|i| Parse::parse(context, i))?;
value.set_from(v);
}
)*
nsCSSCounterDesc::eCSSCounterDesc_COUNT |
nsCSSCounterDesc::eCSSCounterDesc_UNKNOWN => {
panic!("invalid counter descriptor");
}
}
Ok(())
}
}
}