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style: Remove DeclarationPushMode::Update and related code.

Browse source 
Bug: 1473180
Reviewed-by: emilio
MozReview-Commit-ID: 1fI5YRa54lQ
This commit is contained in:
Xidorn Quan 2018-07-19 10:11:04 +10:00 • committed by Emilio Cobos Álvarez
parent b14b2beaad
commit a0edeb1a92
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1 changed files with 0 additions and 41 deletions
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41
components/style/properties/declaration_block.rs
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@ -72,10 +72,6 @@ pub enum DeclarationPushMode {
/// importance, the new declaration will be discarded. Otherwise, it will
/// be appended to the end of the declaration block.
Parsing,
/// In this mode, if there is an existing declaration of the same property,
/// the value is updated in-place. Otherwise it's appended. This is one
/// possible behavior of CSSOM.
Update,
/// In this mode, the new declaration is always pushed to the end of the
/// declaration block. This is another possible behavior of CSSOM.
Append,
@ -468,38 +464,10 @@ impl PropertyDeclarationBlock {
decl.id().as_longhand().map_or(false, |id| !self.longhands.contains(id))
}
/// Returns whether calling extend with `DeclarationPushMode::Update`
/// will cause this declaration block to change.
pub fn will_change_in_update_mode(
&self,
source_declarations: &SourcePropertyDeclaration,
importance: Importance,
) -> bool {
// XXX The type of parameter seems to be necessary because otherwise
// the compiler complains about `decl` not living long enough in the
// all_shorthand expression. Why?
let needs_update = |decl: &_| {
if self.is_definitely_new(decl) {
return true;
}
self.declarations.iter().enumerate()
.find(|&(_, ref slot)| slot.id() == decl.id())
.map_or(true, |(i, slot)| {
let important = self.declarations_importance[i];
*slot != *decl || important != importance.important()
})
};
source_declarations.declarations.iter().any(&needs_update) ||
source_declarations.all_shorthand.declarations().any(|decl| needs_update(&decl))
}
/// Adds or overrides the declaration for a given property in this block.
///
/// See the documentation of `push` to see what impact `source` has when the
/// property is already there.
///
/// When calling with `DeclarationPushMode::Update`, this should not change
/// anything if `will_change_in_update_mode` returns false.
pub fn extend(
&mut self,
mut drain: SourcePropertyDeclarationDrain,
@ -587,15 +555,6 @@ impl PropertyDeclarationBlock {
}
}
}
if matches!(mode, DeclarationPushMode::Update) {
let important = self.declarations_importance[i];
if *slot == declaration && important == importance.important() {
return false;
}
*slot = declaration;
self.declarations_importance.set(i, importance.important());
return true;
}
index_to_remove = Some(i);
break;