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Only cascade at a priority level rules that have declarations of that priority.

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This commit is contained in:
Simon Sapin 2016-08-19 17:13:20 +02:00
parent 16bbc2f26e
commit a175c9981e
6 changed files with 99 additions and 36 deletions
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35
components/style/selector_matching.rs
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@ -164,8 +164,8 @@ impl Stylist {
// Take apart the StyleRule into individual Rules and insert
// them into the SelectorMap of that priority.
macro_rules! append(
($style_rule: ident, $priority: ident, $importance: expr) => {
if !$style_rule.declarations.declarations.is_empty() {
($style_rule: ident, $priority: ident, $importance: expr, $any: ident) => {
if $style_rule.declarations.$any {
for selector in &$style_rule.selectors {
let map = if let Some(ref pseudo) = selector.pseudo_element {
self.pseudos_map
@ -193,8 +193,8 @@ impl Stylist {
for rule in stylesheet.effective_rules(&self.device) {
match *rule {
CSSRule::Style(ref style_rule) => {
append!(style_rule, normal, Importance::Normal);
append!(style_rule, important, Importance::Important);
append!(style_rule, normal, Importance::Normal, any_normal);
append!(style_rule, important, Importance::Important, any_important);
rules_source_order += 1;
for selector in &style_rule.selectors {
@ -396,12 +396,14 @@ impl Stylist {
// Step 4: Normal style attributes.
if let Some(ref sa) = style_attribute {
relations |= AFFECTED_BY_STYLE_ATTRIBUTE;
Push::push(
applicable_declarations,
DeclarationBlock::from_declarations(
sa.declarations.clone(),
Importance::Normal));
if sa.any_normal {
relations |= AFFECTED_BY_STYLE_ATTRIBUTE;
Push::push(
applicable_declarations,
DeclarationBlock::from_declarations(
sa.declarations.clone(),
Importance::Normal));
}
}
debug!("style attr: {:?}", relations);
@ -416,11 +418,14 @@ impl Stylist {
// Step 6: `!important` style attributes.
if let Some(ref sa) = style_attribute {
Push::push(
applicable_declarations,
DeclarationBlock::from_declarations(
sa.declarations.clone(),
Importance::Important));
if sa.any_important {
relations |= AFFECTED_BY_STYLE_ATTRIBUTE;
Push::push(
applicable_declarations,
DeclarationBlock::from_declarations(
sa.declarations.clone(),
Importance::Important));
}
}
debug!("style attr important: {:?}", relations);