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Auto merge of #16575 - emilio:cleanup-matching, r=Wafflespeanut

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style: trivially cleanup the matching code.

I'm reworking this, and found this cleanup that I think is worth to land.

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This commit is contained in:
bors-servo 2017-04-23 04:55:34 -05:00 • committed by GitHub
commit dfe0f4c201
2 changed files with 71 additions and 57 deletions
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117
components/style/matching.rs
View file

@ -370,15 +370,18 @@ trait PrivateMatchMethods: TElement {
font_metrics_provider: &FontMetricsProvider,
rule_node: &StrongRuleNode,
primary_style: &ComputedStyle,
cascade_flags: CascadeFlags,
is_pseudo: bool)
-> Arc<ComputedValues> {
let mut cascade_info = CascadeInfo::new();
let mut cascade_flags = CascadeFlags::empty();
if self.skip_root_and_item_based_display_fixup() {
cascade_flags.insert(SKIP_ROOT_AND_ITEM_BASED_DISPLAY_FIXUP)
}
// Grab the inherited values.
let parent_el;
let parent_data;
let inherited_values_ = if !is_pseudo {
let style_to_inherit_from = if !is_pseudo {
parent_el = self.parent_element();
parent_data = parent_el.as_ref().and_then(|e| e.borrow_data());
let parent_values = parent_data.as_ref().map(|d| {
@ -400,14 +403,14 @@ trait PrivateMatchMethods: TElement {
let mut layout_parent_el = parent_el.clone();
let layout_parent_data;
let mut layout_parent_style = inherited_values_;
if inherited_values_.map_or(false, |s| s.is_display_contents()) {
let mut layout_parent_style = style_to_inherit_from;
if style_to_inherit_from.map_or(false, |s| s.is_display_contents()) {
layout_parent_el = Some(layout_parent_el.unwrap().layout_parent());
layout_parent_data = layout_parent_el.as_ref().unwrap().borrow_data().unwrap();
layout_parent_style = Some(layout_parent_data.styles().primary.values())
}
let inherited_values = inherited_values_.map(|x| &**x);
let style_to_inherit_from = style_to_inherit_from.map(|x| &**x);
let layout_parent_style = layout_parent_style.map(|x| &**x);
// Propagate the "can be fragmented" bit. It would be nice to
@ -429,7 +432,7 @@ trait PrivateMatchMethods: TElement {
Arc::new(cascade(&shared_context.stylist.device,
rule_node,
&shared_context.guards,
inherited_values,
style_to_inherit_from,
layout_parent_style,
Some(&mut cascade_info),
&*shared_context.error_reporter,
@ -443,61 +446,70 @@ trait PrivateMatchMethods: TElement {
fn cascade_internal(&self,
context: &StyleContext<Self>,
primary_style: &ComputedStyle,
pseudo_style: &Option<(&PseudoElement, &mut ComputedStyle)>)
pseudo_style: Option<&ComputedStyle>)
-> Arc<ComputedValues> {
let mut cascade_flags = CascadeFlags::empty();
if self.skip_root_and_item_based_display_fixup() {
cascade_flags.insert(SKIP_ROOT_AND_ITEM_BASED_DISPLAY_FIXUP)
}
// Grab the rule node.
let rule_node = &pseudo_style.as_ref().map_or(primary_style, |p| &*p.1).rules;
self.cascade_with_rules(context.shared, &context.thread_local.font_metrics_provider,
rule_node, primary_style, cascade_flags, pseudo_style.is_some())
let rule_node = &pseudo_style.unwrap_or(primary_style).rules;
self.cascade_with_rules(context.shared,
&context.thread_local.font_metrics_provider,
rule_node,
primary_style,
pseudo_style.is_some())
}
/// Computes values and damage for the primary or pseudo style of an element,
/// setting them on the ElementData.
fn cascade_primary_or_pseudo<'a>(&self,
context: &mut StyleContext<Self>,
data: &mut ElementData,
pseudo: Option<&PseudoElement>,
animate: bool) {
fn cascade_primary_or_pseudo(&self,
context: &mut StyleContext<Self>,
data: &mut ElementData,
pseudo: Option<&PseudoElement>,
animate: bool) {
// Collect some values.
let (mut styles, restyle) = data.styles_and_restyle_mut();
let mut primary_style = &mut styles.primary;
let pseudos = &mut styles.pseudos;
let mut pseudo_style = pseudo.map(|p| (p, pseudos.get_mut(p).unwrap()));
let mut old_values =
pseudo_style.as_mut().map_or_else(|| primary_style.values.take(), |p| p.1.values.take());
let mut pseudo_style = match pseudo {
Some(p) => {
let style = pseudos.get_mut(p);
debug_assert!(style.is_some());
style
}
None => None,
};
let mut old_values = match pseudo_style {
Some(ref mut s) => s.values.take(),
None => primary_style.values.take(),
};
// Compute the new values.
let mut new_values = self.cascade_internal(context, primary_style,
&pseudo_style);
let mut new_values = self.cascade_internal(context,
primary_style,
pseudo_style.as_ref().map(|s| &**s));
// Handle animations.
if animate && !context.shared.traversal_flags.for_animation_only() {
let pseudo_style = pseudo_style.as_ref().map(|&(ref pseudo, ref computed_style)| {
(*pseudo, &**computed_style)
});
self.process_animations(context,
&mut old_values,
&mut new_values,
primary_style,
&pseudo_style);
pseudo,
pseudo_style.as_ref().map(|s| &**s));
}
// Accumulate restyle damage.
if let Some(old) = old_values {
self.accumulate_damage(&context.shared, restyle.unwrap(), &old, &new_values, pseudo);
self.accumulate_damage(&context.shared,
restyle.unwrap(),
&old,
&new_values,
pseudo);
}
// Set the new computed values.
if let Some((_, ref mut style)) = pseudo_style {
style.values = Some(new_values);
} else {
primary_style.values = Some(new_values);
}
let mut relevant_style = pseudo_style.unwrap_or(primary_style);
relevant_style.values = Some(new_values);
}
/// get_after_change_style removes the transition rules from the ComputedValues.
@ -506,10 +518,10 @@ trait PrivateMatchMethods: TElement {
fn get_after_change_style(&self,
context: &mut StyleContext<Self>,
primary_style: &ComputedStyle,
pseudo_style: &Option<(&PseudoElement, &ComputedStyle)>)
pseudo_style: Option<&ComputedStyle>)
-> Option<Arc<ComputedValues>> {
let style = &pseudo_style.as_ref().map_or(primary_style, |p| &*p.1);
let rule_node = &style.rules;
let relevant_style = pseudo_style.unwrap_or(primary_style);
let rule_node = &relevant_style.rules;
let without_transition_rules =
context.shared.stylist.rule_tree.remove_transition_rule_if_applicable(rule_node);
if without_transition_rules == *rule_node {
@ -518,15 +530,10 @@ trait PrivateMatchMethods: TElement {
return None;
}
let mut cascade_flags = CascadeFlags::empty();
if self.skip_root_and_item_based_display_fixup() {
cascade_flags.insert(SKIP_ROOT_AND_ITEM_BASED_DISPLAY_FIXUP);
}
Some(self.cascade_with_rules(context.shared,
&context.thread_local.font_metrics_provider,
&without_transition_rules,
primary_style,
cascade_flags,
pseudo_style.is_some()))
}
@ -561,11 +568,13 @@ trait PrivateMatchMethods: TElement {
old_values: &mut Option<Arc<ComputedValues>>,
new_values: &mut Arc<ComputedValues>,
primary_style: &ComputedStyle,
pseudo_style: &Option<(&PseudoElement, &ComputedStyle)>) {
pseudo: Option<&PseudoElement>,
pseudo_style: Option<&ComputedStyle>) {
use context::{CSS_ANIMATIONS, CSS_TRANSITIONS, EFFECT_PROPERTIES};
use context::UpdateAnimationsTasks;
let pseudo = pseudo_style.map(|(p, _)| p);
debug_assert_eq!(pseudo.is_some(), pseudo_style.is_some());
let mut tasks = UpdateAnimationsTasks::empty();
if self.needs_animations_update(old_values, new_values, pseudo) {
tasks.insert(CSS_ANIMATIONS);
@ -628,7 +637,10 @@ trait PrivateMatchMethods: TElement {
old_values: &mut Option<Arc<ComputedValues>>,
new_values: &mut Arc<ComputedValues>,
_primary_style: &ComputedStyle,
_pseudo_style: &Option<(&PseudoElement, &ComputedStyle)>) {
pseudo: Option<&PseudoElement>,
pseudo_style: Option<&ComputedStyle>) {
debug_assert_eq!(pseudo.is_some(), pseudo_style.is_some());
let possibly_expired_animations =
&mut context.thread_local.current_element_info.as_mut().unwrap()
.possibly_expired_animations;
@ -1297,27 +1309,22 @@ pub trait MatchMethods : TElement {
shared_context: &SharedStyleContext,
font_metrics_provider: &FontMetricsProvider,
primary_style: &ComputedStyle,
pseudo_style: &Option<(&PseudoElement, &ComputedStyle)>)
pseudo_style: Option<&ComputedStyle>)
-> Arc<ComputedValues> {
let style = &pseudo_style.as_ref().map_or(primary_style, |p| &*p.1);
let rule_node = &style.rules;
let relevant_style = pseudo_style.unwrap_or(primary_style);
let rule_node = &relevant_style.rules;
let without_animation_rules =
shared_context.stylist.rule_tree.remove_animation_and_transition_rules(rule_node);
if without_animation_rules == *rule_node {
// Note that unwrapping here is fine, because the style is
// only incomplete during the styling process.
return style.values.as_ref().unwrap().clone();
return relevant_style.values.as_ref().unwrap().clone();
}
let mut cascade_flags = CascadeFlags::empty();
if self.skip_root_and_item_based_display_fixup() {
cascade_flags.insert(SKIP_ROOT_AND_ITEM_BASED_DISPLAY_FIXUP)
}
self.cascade_with_rules(shared_context,
font_metrics_provider,
&without_animation_rules,
primary_style,
cascade_flags,
pseudo_style.is_some())
}

11
ports/geckolib/glue.rs
View file

@ -454,10 +454,17 @@ pub extern "C" fn Servo_StyleSet_GetBaseComputedValuesForElement(raw_data: RawSe
Some(PseudoElement::from_atom_unchecked(atom, /* anon_box = */ false))
};
let pseudos = &styles.pseudos;
let pseudo_style = pseudo.as_ref().map(|p| (p, pseudos.get(p).unwrap()));
let pseudo_style = match pseudo {
Some(ref p) => {
let style = pseudos.get(p);
debug_assert!(style.is_some());
style
}
None => None,
};
let provider = get_metrics_provider_for_product();
element.get_base_style(shared_context, &provider, &styles.primary, &pseudo_style)
element.get_base_style(shared_context, &provider, &styles.primary, pseudo_style)
.into_strong()
}