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stylo: Implement GetSpecificity for ServoStyleRule

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This commit is contained in:
Fernando Jiménez Moreno 2017-06-10 12:41:46 +02:00
parent 87140641a4
commit 2cc940384d
3 changed files with 39 additions and 26 deletions
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27
components/selectors/parser.rs
View file

@ -201,23 +201,6 @@ impl<Impl: SelectorImpl> SelectorList<Impl> {
pub fn from_vec(v: Vec<Selector<Impl>>) -> Self {
SelectorList(v.into_iter().map(SelectorAndHashes::new).collect())
}
pub fn to_css_from_index<W>(&self, from_index: usize, dest: &mut W)
-> fmt::Result where W: fmt::Write {
let mut iter = self.0.iter().skip(from_index);
let first = match iter.next() {
Some(f) => f,
None => return Ok(()),
};
first.selector.to_css(dest)?;
for selector_and_hashes in iter {
dest.write_str(", ")?;
selector_and_hashes.selector.to_css(dest)?;
}
Ok(())
}
}
/// Copied from Gecko, who copied it from WebKit. Note that increasing the
@ -714,7 +697,15 @@ impl<Impl: SelectorImpl> Debug for LocalName<Impl> {
impl<Impl: SelectorImpl> ToCss for SelectorList<Impl> {
fn to_css<W>(&self, dest: &mut W) -> fmt::Result where W: fmt::Write {
self.to_css_from_index(/* from_index = */ 0, dest)
let mut iter = self.0.iter();
let first = iter.next()
.expect("Empty SelectorList, should contain at least one selector");
first.selector.to_css(dest)?;
for selector_and_hashes in iter {
dest.write_str(", ")?;
selector_and_hashes.selector.to_css(dest)?;
}
Ok(())
}
}

8
components/style/gecko/generated/bindings.rs
View file

@ -2112,11 +2112,17 @@ extern "C" {
result: *mut nsAString);
}
extern "C" {
pub fn Servo_StyleRule_GetSelectorTextFromIndex(rule:
pub fn Servo_StyleRule_GetSelectorTextAtIndex(rule:
RawServoStyleRuleBorrowed,
index: u32,
result: *mut nsAString);
}
extern "C" {
pub fn Servo_StyleRule_GetSpecificityAtIndex(rule:
RawServoStyleRuleBorrowed,
index: u32,
specificity: *mut u64);
}
extern "C" {
pub fn Servo_StyleRule_GetSelectorCount(rule: RawServoStyleRuleBorrowed,
count: *mut u32);

30
ports/geckolib/glue.rs
View file

@ -1187,14 +1187,15 @@ pub extern "C" fn Servo_StyleRule_GetSelectorText(rule: RawServoStyleRuleBorrowe
}
#[no_mangle]
pub extern "C" fn Servo_StyleRule_GetSelectorTextFromIndex(rule: RawServoStyleRuleBorrowed,
aSelectorIndex: u32,
result: *mut nsAString) {
pub extern "C" fn Servo_StyleRule_GetSelectorTextAtIndex(rule: RawServoStyleRuleBorrowed,
index: u32,
result: *mut nsAString) {
read_locked_arc(rule, |rule: &StyleRule| {
rule.selectors.to_css_from_index(
aSelectorIndex as usize,
unsafe { result.as_mut().unwrap() }
).unwrap();
let index = index as usize;
if index >= rule.selectors.0.len() {
return;
}
rule.selectors.0[index].selector.to_css(unsafe { result.as_mut().unwrap() }).unwrap();
})
}
@ -1205,6 +1206,21 @@ pub extern "C" fn Servo_StyleRule_GetSelectorCount(rule: RawServoStyleRuleBorrow
})
}
#[no_mangle]
pub extern "C" fn Servo_StyleRule_GetSpecificityAtIndex(rule: RawServoStyleRuleBorrowed,
index: u32,
specificity: *mut u64) {
read_locked_arc(rule, |rule: &StyleRule| {
let mut specificity = unsafe { specificity.as_mut().unwrap() };
let index = index as usize;
if index >= rule.selectors.0.len() {
*specificity = 0;
return;
}
*specificity = rule.selectors.0[index].selector.specificity() as u64;
})
}
#[no_mangle]
pub extern "C" fn Servo_ImportRule_GetHref(rule: RawServoImportRuleBorrowed, result: *mut nsAString) {
read_locked_arc(rule, |rule: &ImportRule| {