Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 71 insertions, 0 deletions

diff --git a/servo/components/style/stylesheets/page_rule.rs b/servo/components/style/stylesheets/page_rule.rs
new file mode 100644
index 0000000000..3edf562258
--- /dev/null
+++ b/servo/components/style/stylesheets/page_rule.rs
@@ -0,0 +1,71 @@
+/* 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/. */
+
+//! A [`@page`][page] rule.
+//!
+//! [page]: https://drafts.csswg.org/css2/page.html#page-box
+
+use crate::properties::PropertyDeclarationBlock;
+use crate::shared_lock::{DeepCloneParams, DeepCloneWithLock, Locked};
+use crate::shared_lock::{SharedRwLock, SharedRwLockReadGuard, ToCssWithGuard};
+use crate::str::CssStringWriter;
+use cssparser::SourceLocation;
+#[cfg(feature = "gecko")]
+use malloc_size_of::{MallocSizeOf, MallocSizeOfOps, MallocUnconditionalShallowSizeOf};
+use servo_arc::Arc;
+use std::fmt::{self, Write};
+
+/// A [`@page`][page] rule.
+///
+/// This implements only a limited subset of the CSS
+/// 2.2 syntax.
+///
+/// In this subset, [page selectors][page-selectors] are not implemented.
+///
+/// [page]: https://drafts.csswg.org/css2/page.html#page-box
+/// [page-selectors]: https://drafts.csswg.org/css2/page.html#page-selectors
+#[derive(Debug, ToShmem)]
+pub struct PageRule {
+    /// The declaration block this page rule contains.
+    pub block: Arc<Locked<PropertyDeclarationBlock>>,
+    /// The source position this rule was found at.
+    pub source_location: SourceLocation,
+}
+
+impl PageRule {
+    /// Measure heap usage.
+    #[cfg(feature = "gecko")]
+    pub fn size_of(&self, guard: &SharedRwLockReadGuard, ops: &mut MallocSizeOfOps) -> usize {
+        // Measurement of other fields may be added later.
+        self.block.unconditional_shallow_size_of(ops) + self.block.read_with(guard).size_of(ops)
+    }
+}
+
+impl ToCssWithGuard for PageRule {
+    /// Serialization of PageRule is not specced, adapted from steps for
+    /// StyleRule.
+    fn to_css(&self, guard: &SharedRwLockReadGuard, dest: &mut CssStringWriter) -> fmt::Result {
+        dest.write_str("@page { ")?;
+        let declaration_block = self.block.read_with(guard);
+        declaration_block.to_css(dest)?;
+        if !declaration_block.declarations().is_empty() {
+            dest.write_str(" ")?;
+        }
+        dest.write_str("}")
+    }
+}
+
+impl DeepCloneWithLock for PageRule {
+    fn deep_clone_with_lock(
+        &self,
+        lock: &SharedRwLock,
+        guard: &SharedRwLockReadGuard,
+        _params: &DeepCloneParams,
+    ) -> Self {
+        PageRule {
+            block: Arc::new(lock.wrap(self.block.read_with(&guard).clone())),
+            source_location: self.source_location.clone(),
+        }
+    }
+}