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style: Make the author styles disabled stuff actually disable style attribute, animations, and XBL rules.

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This also removes one of my FIXMEs from when I was looking at this code.

We don't seem to have a pre-existing test for this feature, sigh. I'll try to
write one if I have cycles for it...

Note that it not applying XBL rules is a feature, given the current state of
affairs. Video controls and such are right now unusable with no styles enabled.

Differential Revision: https://phabricator.services.mozilla.com/D4795
This commit is contained in:
Emilio Cobos Álvarez 2018-09-03 07:31:29 +00:00
parent 0c0018e4d6
commit 3f08d2cc02
No known key found for this signature in database
GPG key ID: 056B727BB9C1027C
1 changed files with 98 additions and 100 deletions
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198
components/style/stylist.rs
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@ -1129,8 +1129,6 @@ impl Stylist {
let rule_hash_target = element.rule_hash_target();
let matches_user_rules = rule_hash_target.matches_user_and_author_rules();
let matches_author_rules =
matches_user_rules && self.author_styles_enabled == AuthorStylesEnabled::Yes;
// Normal user-agent rules.
if let Some(map) = self.cascade_data
@ -1195,7 +1193,11 @@ impl Stylist {
}
}
let mut match_document_author_rules = matches_author_rules;
if self.author_styles_enabled == AuthorStylesEnabled::No {
return;
}
let mut match_document_author_rules = matches_user_rules;
let mut shadow_cascade_order = 0;
// XBL / Shadow DOM rules, which are author rules too.
@ -1204,106 +1206,102 @@ impl Stylist {
// particular, normally document rules override ::slotted() rules, but
// for !important it should be the other way around. So probably we need
// to add some sort of AuthorScoped cascade level or something.
if matches_author_rules {
if let Some(shadow) = rule_hash_target.shadow_root() {
if let Some(map) = shadow.style_data().and_then(|data| data.host_rules(pseudo_element)) {
context.with_shadow_host(Some(rule_hash_target), |context| {
map.get_all_matching_rules(
element,
rule_hash_target,
applicable_declarations,
context,
flags_setter,
CascadeLevel::InnerShadowNormal,
shadow_cascade_order,
);
});
shadow_cascade_order += 1;
}
}
// Match slotted rules in reverse order, so that the outer slotted
// rules come before the inner rules (and thus have less priority).
let mut slots = SmallVec::<[_; 3]>::new();
let mut current = rule_hash_target.assigned_slot();
while let Some(slot) = current {
slots.push(slot);
current = slot.assigned_slot();
}
for slot in slots.iter().rev() {
let shadow = slot.containing_shadow().unwrap();
if let Some(map) = shadow.style_data().and_then(|data| data.slotted_rules(pseudo_element)) {
context.with_shadow_host(Some(shadow.host()), |context| {
map.get_all_matching_rules(
element,
rule_hash_target,
applicable_declarations,
context,
flags_setter,
CascadeLevel::InnerShadowNormal,
shadow_cascade_order,
);
});
shadow_cascade_order += 1;
}
}
let mut current_containing_shadow = rule_hash_target.containing_shadow();
while let Some(containing_shadow) = current_containing_shadow {
let cascade_data = containing_shadow.style_data();
let host = containing_shadow.host();
if let Some(map) = cascade_data.and_then(|data| data.normal_rules(pseudo_element)) {
context.with_shadow_host(Some(host), |context| {
map.get_all_matching_rules(
element,
rule_hash_target,
applicable_declarations,
context,
flags_setter,
CascadeLevel::SameTreeAuthorNormal,
shadow_cascade_order,
);
});
shadow_cascade_order += 1;
}
let host_is_svg_use_element =
host.is_svg_element() &&
host.local_name() == &*local_name!("use");
if !host_is_svg_use_element {
match_document_author_rules = false;
break;
}
debug_assert!(
cascade_data.is_none(),
"We allow no stylesheets in <svg:use> subtrees"
);
// NOTE(emilio): Hack so <svg:use> matches the rules of the
// enclosing tree.
//
// This is not a problem for invalidation and that kind of stuff
// because they still don't match rules based on elements
// outside of the shadow tree, and because the <svg:use>
// subtrees are immutable and recreated each time the source
// tree changes.
//
// We historically allow cross-document <svg:use> to have these
// rules applied, but I think that's not great. Gecko is the
// only engine supporting that.
//
// See https://github.com/w3c/svgwg/issues/504 for the relevant
// spec discussion.
current_containing_shadow = host.containing_shadow();
match_document_author_rules = current_containing_shadow.is_none();
if let Some(shadow) = rule_hash_target.shadow_root() {
if let Some(map) = shadow.style_data().and_then(|data| data.host_rules(pseudo_element)) {
context.with_shadow_host(Some(rule_hash_target), |context| {
map.get_all_matching_rules(
element,
rule_hash_target,
applicable_declarations,
context,
flags_setter,
CascadeLevel::InnerShadowNormal,
shadow_cascade_order,
);
});
shadow_cascade_order += 1;
}
}
// FIXME(emilio): This doesn't account for the author_styles_enabled
// stuff...
// Match slotted rules in reverse order, so that the outer slotted
// rules come before the inner rules (and thus have less priority).
let mut slots = SmallVec::<[_; 3]>::new();
let mut current = rule_hash_target.assigned_slot();
while let Some(slot) = current {
slots.push(slot);
current = slot.assigned_slot();
}
for slot in slots.iter().rev() {
let shadow = slot.containing_shadow().unwrap();
if let Some(map) = shadow.style_data().and_then(|data| data.slotted_rules(pseudo_element)) {
context.with_shadow_host(Some(shadow.host()), |context| {
map.get_all_matching_rules(
element,
rule_hash_target,
applicable_declarations,
context,
flags_setter,
CascadeLevel::InnerShadowNormal,
shadow_cascade_order,
);
});
shadow_cascade_order += 1;
}
}
let mut current_containing_shadow = rule_hash_target.containing_shadow();
while let Some(containing_shadow) = current_containing_shadow {
let cascade_data = containing_shadow.style_data();
let host = containing_shadow.host();
if let Some(map) = cascade_data.and_then(|data| data.normal_rules(pseudo_element)) {
context.with_shadow_host(Some(host), |context| {
map.get_all_matching_rules(
element,
rule_hash_target,
applicable_declarations,
context,
flags_setter,
CascadeLevel::SameTreeAuthorNormal,
shadow_cascade_order,
);
});
shadow_cascade_order += 1;
}
let host_is_svg_use_element =
host.is_svg_element() &&
host.local_name() == &*local_name!("use");
if !host_is_svg_use_element {
match_document_author_rules = false;
break;
}
debug_assert!(
cascade_data.is_none(),
"We allow no stylesheets in <svg:use> subtrees"
);
// NOTE(emilio): Hack so <svg:use> matches the rules of the
// enclosing tree.
//
// This is not a problem for invalidation and that kind of stuff
// because they still don't match rules based on elements
// outside of the shadow tree, and because the <svg:use>
// subtrees are immutable and recreated each time the source
// tree changes.
//
// We historically allow cross-document <svg:use> to have these
// rules applied, but I think that's not great. Gecko is the
// only engine supporting that.
//
// See https://github.com/w3c/svgwg/issues/504 for the relevant
// spec discussion.
current_containing_shadow = host.containing_shadow();
match_document_author_rules = current_containing_shadow.is_none();
}
let cut_xbl_binding_inheritance =
element.each_xbl_cascade_data(|cascade_data, quirks_mode| {
if let Some(map) = cascade_data.normal_rules(pseudo_element) {