script: Move CSS DOM interfaces to script/dom/css/ (#40241)

Moves interfaces defined by the CSS spec to the `script/dom/css/` module
from `script/dom/`.

Testing: Just a refactor shouldn't need any testing
Fixes: Partially #38901

Signed-off-by: WaterWhisperer <waterwhisperer24@qq.com>

components/script/dom/css/csskeyframesrule.rs

@@ -0,0 +1,196 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+use std::cell::RefCell;
+
+use cssparser::{Parser, ParserInput};
+use dom_struct::dom_struct;
+use servo_arc::Arc;
+use style::shared_lock::{Locked, SharedRwLockReadGuard, ToCssWithGuard};
+use style::stylesheets::keyframes_rule::{Keyframe, KeyframeSelector, KeyframesRule};
+use style::stylesheets::{CssRuleType, StylesheetInDocument};
+use style::values::KeyframesName;
+
+use super::csskeyframerule::CSSKeyframeRule;
+use super::cssrule::{CSSRule, SpecificCSSRule};
+use super::cssrulelist::{CSSRuleList, RulesSource};
+use super::cssstylesheet::CSSStyleSheet;
+use crate::dom::bindings::codegen::Bindings::CSSKeyframesRuleBinding::CSSKeyframesRuleMethods;
+use crate::dom::bindings::error::ErrorResult;
+use crate::dom::bindings::inheritance::Castable;
+use crate::dom::bindings::reflector::{DomGlobal, reflect_dom_object};
+use crate::dom::bindings::root::{DomRoot, MutNullableDom};
+use crate::dom::bindings::str::DOMString;
+use crate::dom::window::Window;
+use crate::script_runtime::CanGc;
+
+#[dom_struct]
+pub(crate) struct CSSKeyframesRule {
+    cssrule: CSSRule,
+    #[ignore_malloc_size_of = "Stylo"]
+    #[no_trace]
+    keyframesrule: RefCell<Arc<Locked<KeyframesRule>>>,
+    rulelist: MutNullableDom<CSSRuleList>,
+}
+
+impl CSSKeyframesRule {
+    fn new_inherited(
+        parent_stylesheet: &CSSStyleSheet,
+        keyframesrule: Arc<Locked<KeyframesRule>>,
+    ) -> CSSKeyframesRule {
+        CSSKeyframesRule {
+            cssrule: CSSRule::new_inherited(parent_stylesheet),
+            keyframesrule: RefCell::new(keyframesrule),
+            rulelist: MutNullableDom::new(None),
+        }
+    }
+
+    #[cfg_attr(crown, allow(crown::unrooted_must_root))]
+    pub(crate) fn new(
+        window: &Window,
+        parent_stylesheet: &CSSStyleSheet,
+        keyframesrule: Arc<Locked<KeyframesRule>>,
+        can_gc: CanGc,
+    ) -> DomRoot<CSSKeyframesRule> {
+        reflect_dom_object(
+            Box::new(CSSKeyframesRule::new_inherited(
+                parent_stylesheet,
+                keyframesrule,
+            )),
+            window,
+            can_gc,
+        )
+    }
+
+    fn rulelist(&self, can_gc: CanGc) -> DomRoot<CSSRuleList> {
+        self.rulelist.or_init(|| {
+            let parent_stylesheet = &self.upcast::<CSSRule>().parent_stylesheet();
+            CSSRuleList::new(
+                self.global().as_window(),
+                parent_stylesheet,
+                RulesSource::Keyframes(self.keyframesrule.borrow().clone()),
+                can_gc,
+            )
+        })
+    }
+
+    /// Given a keyframe selector, finds the index of the first corresponding rule if any
+    fn find_rule(&self, selector: &DOMString) -> Option<usize> {
+        let selector = selector.str();
+        let mut input = ParserInput::new(&selector);
+        let mut input = Parser::new(&mut input);
+        if let Ok(sel) = KeyframeSelector::parse(&mut input) {
+            let guard = self.cssrule.shared_lock().read();
+            // This finds the *last* element matching a selector
+            // because that's the rule that applies. Thus, rposition
+            self.keyframesrule
+                .borrow()
+                .read_with(&guard)
+                .keyframes
+                .iter()
+                .rposition(|frame| frame.read_with(&guard).selector == sel)
+        } else {
+            None
+        }
+    }
+
+    pub(crate) fn update_rule(
+        &self,
+        keyframesrule: Arc<Locked<KeyframesRule>>,
+        guard: &SharedRwLockReadGuard,
+    ) {
+        if let Some(rulelist) = self.rulelist.get() {
+            rulelist.update_rules(RulesSource::Keyframes(keyframesrule.clone()), guard);
+        }
+
+        *self.keyframesrule.borrow_mut() = keyframesrule;
+    }
+}
+
+impl CSSKeyframesRuleMethods<crate::DomTypeHolder> for CSSKeyframesRule {
+    // https://drafts.csswg.org/css-animations/#dom-csskeyframesrule-cssrules
+    fn CssRules(&self, can_gc: CanGc) -> DomRoot<CSSRuleList> {
+        self.rulelist(can_gc)
+    }
+
+    // https://drafts.csswg.org/css-animations/#dom-csskeyframesrule-appendrule
+    fn AppendRule(&self, rule: DOMString, can_gc: CanGc) {
+        let style_stylesheet = self.cssrule.parent_stylesheet().style_stylesheet();
+        let rule = rule.str();
+        let rule = {
+            let guard = style_stylesheet.shared_lock.read();
+            Keyframe::parse(
+                &rule,
+                style_stylesheet.contents(&guard),
+                &style_stylesheet.shared_lock,
+            )
+        };
+
+        if let Ok(rule) = rule {
+            self.cssrule.parent_stylesheet().will_modify();
+            let mut guard = self.cssrule.shared_lock().write();
+            self.keyframesrule
+                .borrow()
+                .write_with(&mut guard)
+                .keyframes
+                .push(rule);
+            self.rulelist(can_gc).append_lazy_dom_rule();
+            self.cssrule.parent_stylesheet().notify_invalidations();
+        }
+    }
+
+    // https://drafts.csswg.org/css-animations/#dom-csskeyframesrule-deleterule
+    fn DeleteRule(&self, selector: DOMString, can_gc: CanGc) {
+        if let Some(idx) = self.find_rule(&selector) {
+            let _ = self.rulelist(can_gc).remove_rule(idx as u32);
+        }
+    }
+
+    // https://drafts.csswg.org/css-animations/#dom-csskeyframesrule-findrule
+    fn FindRule(&self, selector: DOMString, can_gc: CanGc) -> Option<DomRoot<CSSKeyframeRule>> {
+        self.find_rule(&selector)
+            .and_then(|idx| self.rulelist(can_gc).item(idx as u32, can_gc))
+            .and_then(DomRoot::downcast)
+    }
+
+    // https://drafts.csswg.org/css-animations/#dom-csskeyframesrule-name
+    fn Name(&self) -> DOMString {
+        let guard = self.cssrule.shared_lock().read();
+        DOMString::from(&**self.keyframesrule.borrow().read_with(&guard).name.as_atom())
+    }
+
+    // https://drafts.csswg.org/css-animations/#dom-csskeyframesrule-name
+    fn SetName(&self, value: DOMString) -> ErrorResult {
+        // Spec deviation: https://github.com/w3c/csswg-drafts/issues/801
+        // Setting this property to a CSS-wide keyword or `none` does not throw,
+        // it stores a value that serializes as a quoted string.
+        self.cssrule.parent_stylesheet().will_modify();
+        let name = KeyframesName::from_ident(&value.str());
+        let mut guard = self.cssrule.shared_lock().write();
+        self.keyframesrule.borrow().write_with(&mut guard).name = name;
+        self.cssrule.parent_stylesheet().notify_invalidations();
+        Ok(())
+    }
+}
+
+impl SpecificCSSRule for CSSKeyframesRule {
+    fn ty(&self) -> CssRuleType {
+        CssRuleType::Keyframes
+    }
+
+    fn get_css(&self) -> DOMString {
+        let guard = self.cssrule.shared_lock().read();
+        self.keyframesrule
+            .borrow()
+            .read_with(&guard)
+            .to_css_string(&guard)
+            .into()
+    }
+
+    fn deparent_children(&self) {
+        if let Some(list) = self.rulelist.get() {
+            list.deparent_all()
+        }
+    }
+}