From 26a029d407be480d791972afb5975cf62c9360a6 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Fri, 19 Apr 2024 02:47:55 +0200
Subject: Adding upstream version 124.0.1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 .../style/properties_and_values/registry.rs        | 104 +++++++++++++++++++++
 1 file changed, 104 insertions(+)
 create mode 100644 servo/components/style/properties_and_values/registry.rs

(limited to 'servo/components/style/properties_and_values/registry.rs')

diff --git a/servo/components/style/properties_and_values/registry.rs b/servo/components/style/properties_and_values/registry.rs
new file mode 100644
index 0000000000..e3cd552c9c
--- /dev/null
+++ b/servo/components/style/properties_and_values/registry.rs
@@ -0,0 +1,104 @@
+/* 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/. */
+
+//! Registered custom properties.
+
+use super::rule::{Inherits, InitialValue, PropertyRuleName};
+use super::syntax::Descriptor;
+use crate::selector_map::PrecomputedHashMap;
+use crate::stylesheets::UrlExtraData;
+use crate::Atom;
+use cssparser::SourceLocation;
+
+/// The metadata of a custom property registration that we need to do the cascade properly.
+#[derive(Debug, Clone, MallocSizeOf)]
+pub struct PropertyRegistrationData {
+    /// The syntax of the property.
+    pub syntax: Descriptor,
+    /// Whether the property inherits.
+    pub inherits: Inherits,
+    /// The initial value. Only missing for universal syntax.
+    #[ignore_malloc_size_of = "Arc"]
+    pub initial_value: Option<InitialValue>,
+}
+
+static UNREGISTERED: PropertyRegistrationData = PropertyRegistrationData {
+    syntax: Descriptor::universal(),
+    inherits: Inherits::True,
+    initial_value: None,
+};
+
+impl PropertyRegistrationData {
+    /// The data for an unregistered property.
+    pub fn unregistered() -> &'static Self {
+        &UNREGISTERED
+    }
+
+    /// Returns whether this property inherits.
+    #[inline]
+    pub fn inherits(&self) -> bool {
+        self.inherits == Inherits::True
+    }
+}
+
+/// A computed, already-validated property registration.
+/// <https://drafts.css-houdini.org/css-properties-values-api-1/#custom-property-registration>
+#[derive(Debug, Clone, MallocSizeOf)]
+pub struct PropertyRegistration {
+    /// The custom property name.
+    pub name: PropertyRuleName,
+    /// The actual information about the property.
+    pub data: PropertyRegistrationData,
+    /// The url data that is used to parse and compute the registration's initial value. Note that
+    /// it's not the url data that should be used to parse other values. Other values should use
+    /// the data of the style sheet where they came from.
+    pub url_data: UrlExtraData,
+    /// The source location of this registration, if it comes from a CSS rule.
+    pub source_location: SourceLocation,
+}
+
+impl PropertyRegistration {
+    /// Returns whether this property inherits.
+    #[inline]
+    pub fn inherits(&self) -> bool {
+        self.data.inherits == Inherits::True
+    }
+}
+
+/// The script registry of custom properties.
+/// <https://drafts.css-houdini.org/css-properties-values-api-1/#dom-window-registeredpropertyset-slot>
+#[derive(Default)]
+pub struct ScriptRegistry {
+    properties: PrecomputedHashMap<Atom, PropertyRegistration>,
+}
+
+impl ScriptRegistry {
+    /// Gets an already-registered custom property via script.
+    #[inline]
+    pub fn get(&self, name: &Atom) -> Option<&PropertyRegistration> {
+        self.properties.get(name)
+    }
+
+    /// Gets already-registered custom properties via script.
+    #[inline]
+    pub fn properties(&self) -> &PrecomputedHashMap<Atom, PropertyRegistration> {
+        &self.properties
+    }
+
+    /// Register a given property. As per
+    /// <https://drafts.css-houdini.org/css-properties-values-api-1/#the-registerproperty-function>
+    /// we don't allow overriding the registration.
+    #[inline]
+    pub fn register(&mut self, registration: PropertyRegistration) {
+        let name = registration.name.0.clone();
+        let old = self.properties.insert(name, registration);
+        debug_assert!(old.is_none(), "Already registered? Should be an error");
+    }
+
+    /// Returns the properties hashmap.
+    #[inline]
+    pub fn get_all(&self) -> &PrecomputedHashMap<Atom, PropertyRegistration> {
+        &self.properties
+    }
+}
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