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style: Fix visited handling after bug 1763750
Before bug 1763750, we unconditionally called compute_writing_mode, which got the writing mode from the cascade mode for visited styles. However after that bug we only do that if we apply any writing-mode-related property. We could just call compute_writing_mode unconditionally, but instead it seems better to skip all that work for visited cascade and reuse the mechanism introduced in that bug to only apply the visited-dependent longhands. We assert that all visited-dependent longhands are "late" longhands, so as to also avoid applying the font group and such. Differential Revision: https://phabricator.services.mozilla.com/D143490
This commit is contained in:
Emilio Cobos Álvarez
Martin Robinson
parent
d868cddb09
commit
14fb147b6c
2 changed files with 100 additions and 98 deletions
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@ -296,56 +296,69 @@ where
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rule_cache_conditions: RefCell::new(rule_cache_conditions),
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};
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let using_cached_reset_properties = {
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let mut cascade = Cascade::new(&mut context, cascade_mode, &referenced_properties);
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let mut shorthand_cache = ShorthandsWithPropertyReferencesCache::default();
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if cascade.apply_properties(
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CanHaveLogicalProperties::No,
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LonghandIdSet::writing_mode_group(),
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declarations.iter().cloned(),
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&mut shorthand_cache,
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) {
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cascade.compute_writing_mode();
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let using_cached_reset_properties;
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let mut cascade = Cascade::new(&mut context, cascade_mode, &referenced_properties);
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let mut shorthand_cache = ShorthandsWithPropertyReferencesCache::default();
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let properties_to_apply = match cascade.cascade_mode {
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CascadeMode::Visited { writing_mode } => {
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cascade.context.builder.writing_mode = writing_mode;
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// We never insert visited styles into the cache so we don't need to
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// try looking it up. It also wouldn't be super-profitable, only a
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// handful reset properties are non-inherited.
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using_cached_reset_properties = false;
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LonghandIdSet::visited_dependent()
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},
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CascadeMode::Unvisited { visited_rules } => {
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if cascade.apply_properties(
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CanHaveLogicalProperties::No,
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LonghandIdSet::writing_mode_group(),
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declarations.iter().cloned(),
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&mut shorthand_cache,
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) {
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cascade.compute_writing_mode();
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}
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if cascade.apply_properties(
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CanHaveLogicalProperties::No,
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LonghandIdSet::fonts_and_color_group(),
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declarations.iter().cloned(),
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&mut shorthand_cache,
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) {
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cascade.fixup_font_stuff();
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}
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if let Some(visited_rules) = visited_rules {
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cascade.compute_visited_style_if_needed(
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element,
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parent_style,
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parent_style_ignoring_first_line,
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layout_parent_style,
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visited_rules,
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guards,
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);
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}
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using_cached_reset_properties =
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cascade.try_to_use_cached_reset_properties(rule_cache, guards);
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if using_cached_reset_properties {
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LonghandIdSet::late_group_only_inherited()
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} else {
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LonghandIdSet::late_group()
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}
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}
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if cascade.apply_properties(
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CanHaveLogicalProperties::No,
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LonghandIdSet::fonts_and_color_group(),
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declarations.iter().cloned(),
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&mut shorthand_cache,
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) {
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cascade.fixup_font_stuff();
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}
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cascade.compute_visited_style_if_needed(
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element,
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parent_style,
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parent_style_ignoring_first_line,
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layout_parent_style,
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guards,
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);
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let using_cached_reset_properties =
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cascade.try_to_use_cached_reset_properties(rule_cache, guards);
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let properties_to_apply = if using_cached_reset_properties {
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LonghandIdSet::late_group_only_inherited()
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} else {
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LonghandIdSet::late_group()
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};
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cascade.apply_properties(
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CanHaveLogicalProperties::Yes,
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properties_to_apply,
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declarations.iter().cloned(),
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&mut shorthand_cache,
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);
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cascade.finished_applying_properties();
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using_cached_reset_properties
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};
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cascade.apply_properties(
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CanHaveLogicalProperties::Yes,
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properties_to_apply,
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declarations.iter().cloned(),
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&mut shorthand_cache,
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);
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cascade.finished_applying_properties();
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context.builder.clear_modified_reset();
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if matches!(cascade_mode, CascadeMode::Unvisited { .. }) {
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@ -627,15 +640,6 @@ impl<'a, 'b: 'a> Cascade<'a, 'b> {
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}
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}
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// Only a few properties are allowed to depend on the visited state
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// of links. When cascading visited styles, we can save time by
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// only processing these properties.
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if matches!(self.cascade_mode, CascadeMode::Visited { .. }) &&
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!physical_longhand_id.is_visited_dependent()
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{
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continue;
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}
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let mut declaration =
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self.substitute_variables_if_needed(declaration, &mut shorthand_cache);
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@ -708,13 +712,9 @@ impl<'a, 'b: 'a> Cascade<'a, 'b> {
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}
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fn compute_writing_mode(&mut self) {
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let writing_mode = match self.cascade_mode {
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CascadeMode::Unvisited { .. } => {
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WritingMode::new(self.context.builder.get_inherited_box())
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},
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CascadeMode::Visited { writing_mode } => writing_mode,
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};
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self.context.builder.writing_mode = writing_mode;
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debug_assert!(matches!(self.cascade_mode, CascadeMode::Unvisited { .. }));
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self.context.builder.writing_mode =
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WritingMode::new(self.context.builder.get_inherited_box())
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}
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fn compute_visited_style_if_needed<E>(
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@ -723,20 +723,12 @@ impl<'a, 'b: 'a> Cascade<'a, 'b> {
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parent_style: Option<&ComputedValues>,
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parent_style_ignoring_first_line: Option<&ComputedValues>,
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layout_parent_style: Option<&ComputedValues>,
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visited_rules: &StrongRuleNode,
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guards: &StylesheetGuards,
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) where
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E: TElement,
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{
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let visited_rules = match self.cascade_mode {
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CascadeMode::Unvisited { visited_rules } => visited_rules,
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CascadeMode::Visited { .. } => return,
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};
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let visited_rules = match visited_rules {
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Some(rules) => rules,
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None => return,
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};
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debug_assert!(matches!(self.cascade_mode, CascadeMode::Unvisited { .. }));
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let is_link = self.context.builder.pseudo.is_none() && element.unwrap().is_link();
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macro_rules! visited_parent {
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@ -934,6 +934,29 @@ CASCADE_GROUPS = {
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def in_late_group(p):
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return p.name not in CASCADE_GROUPS["writing_mode"] and p.name not in CASCADE_GROUPS["fonts_and_color"]
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def is_visited_dependent(p):
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return p.name in [
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"column-rule-color",
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"text-emphasis-color",
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"-webkit-text-fill-color",
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"-webkit-text-stroke-color",
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"text-decoration-color",
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"fill",
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"stroke",
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"caret-color",
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"background-color",
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"border-top-color",
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"border-right-color",
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"border-bottom-color",
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"border-left-color",
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"border-block-start-color",
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"border-inline-end-color",
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"border-block-end-color",
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"border-inline-start-color",
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"outline-color",
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"color",
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]
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%>
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impl LonghandIdSet {
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@ -972,6 +995,18 @@ impl LonghandIdSet {
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&IGNORED_WHEN_COLORS_DISABLED
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}
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/// Only a few properties are allowed to depend on the visited state of
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/// links. When cascading visited styles, we can save time by only
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/// processing these properties.
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fn visited_dependent() -> &'static Self {
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${static_longhand_id_set(
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"VISITED_DEPENDENT",
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lambda p: is_visited_dependent(p)
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)}
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debug_assert!(Self::late_group().contains_all(&VISITED_DEPENDENT));
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&VISITED_DEPENDENT
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}
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#[inline]
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fn writing_mode_group() -> &'static Self {
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${static_longhand_id_set(
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@ -1404,31 +1439,6 @@ impl LonghandId {
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PropertyFlags::from_bits_truncate(FLAGS[self as usize])
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}
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/// Only a few properties are allowed to depend on the visited state of
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/// links. When cascading visited styles, we can save time by only
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/// processing these properties.
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fn is_visited_dependent(&self) -> bool {
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matches!(*self,
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% if engine == "gecko":
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LonghandId::ColumnRuleColor |
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LonghandId::TextEmphasisColor |
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LonghandId::WebkitTextFillColor |
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LonghandId::WebkitTextStrokeColor |
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LonghandId::TextDecorationColor |
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LonghandId::Fill |
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LonghandId::Stroke |
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LonghandId::CaretColor |
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% endif
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LonghandId::BackgroundColor |
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LonghandId::BorderTopColor |
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LonghandId::BorderRightColor |
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LonghandId::BorderBottomColor |
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LonghandId::BorderLeftColor |
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LonghandId::OutlineColor |
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LonghandId::Color
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)
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}
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/// Returns true if the property is one that is ignored when document
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/// colors are disabled.
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#[inline]
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