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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
commit | 26a029d407be480d791972afb5975cf62c9360a6 (patch) | |
tree | f435a8308119effd964b339f76abb83a57c29483 /servo/components/style/stylesheets/margin_rule.rs | |
parent | Initial commit. (diff) | |
download | firefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz firefox-26a029d407be480d791972afb5975cf62c9360a6.zip |
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'servo/components/style/stylesheets/margin_rule.rs')
-rw-r--r-- | servo/components/style/stylesheets/margin_rule.rs | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/servo/components/style/stylesheets/margin_rule.rs b/servo/components/style/stylesheets/margin_rule.rs new file mode 100644 index 0000000000..ab46283151 --- /dev/null +++ b/servo/components/style/stylesheets/margin_rule.rs @@ -0,0 +1,167 @@ +/* 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 [`@margin`][margin] rule. +//! +//! [margin]: https://drafts.csswg.org/css-page-3/#margin-boxes + +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}; + +macro_rules! margin_rule_types { + ($($(#[$($meta:tt)+])* $id:ident => $val:literal,)+) => { + /// [`@margin`][margin] rule names. + /// + /// https://drafts.csswg.org/css-page-3/#margin-at-rules + #[derive(Clone, Copy, Debug, Eq, MallocSizeOf, PartialEq, ToShmem)] + #[repr(u8)] + pub enum MarginRuleType { + $($(#[$($meta)+])* $id,)+ + } + + impl MarginRuleType { + #[inline] + fn to_str(&self) -> &'static str { + match *self { + $(MarginRuleType::$id => concat!('@', $val),)+ + } + } + /// Matches the rule type for this name. This does not expect a + /// leading '@'. + pub fn match_name(name: &str) -> Option<Self> { + Some(match_ignore_ascii_case! { name, + $( $val => MarginRuleType::$id, )+ + _ => return None, + }) + } + } + } +} + +margin_rule_types! { + /// [`@top-left-corner`][top-left-corner] margin rule + /// + /// [top-left-corner] https://drafts.csswg.org/css-page-3/#top-left-corner-box-def + TopLeftCorner => "top-left-corner", + /// [`@top-left`][top-left] margin rule + /// + /// [top-left] https://drafts.csswg.org/css-page-3/#top-left-box-def + TopLeft => "top-left", + /// [`@top-center`][top-center] margin rule + /// + /// [top-center] https://drafts.csswg.org/css-page-3/#top-center-box-def + TopCenter => "top-center", + /// [`@top-right`][top-right] margin rule + /// + /// [top-right] https://drafts.csswg.org/css-page-3/#top-right-box-def + TopRight => "top-right", + /// [`@top-right-corner`][top-right-corner] margin rule + /// + /// [top-right-corner] https://drafts.csswg.org/css-page-3/#top-right-corner-box-def + TopRightCorner => "top-right-corner", + /// [`@bottom-left-corner`][bottom-left-corner] margin rule + /// + /// [bottom-left-corner] https://drafts.csswg.org/css-page-3/#bottom-left-corner-box-def + BottomLeftCorner => "bottom-left-corner", + /// [`@bottom-left`][bottom-left] margin rule + /// + /// [bottom-left] https://drafts.csswg.org/css-page-3/#bottom-left-box-def + BottomLeft => "bottom-left", + /// [`@bottom-center`][bottom-center] margin rule + /// + /// [bottom-center] https://drafts.csswg.org/css-page-3/#bottom-center-box-def + BottomCenter => "bottom-center", + /// [`@bottom-right`][bottom-right] margin rule + /// + /// [bottom-right] https://drafts.csswg.org/css-page-3/#bottom-right-box-def + BottomRight => "bottom-right", + /// [`@bottom-right-corner`][bottom-right-corner] margin rule + /// + /// [bottom-right-corner] https://drafts.csswg.org/css-page-3/#bottom-right-corner-box-def + BottomRightCorner => "bottom-right-corner", + /// [`@left-top`][left-top] margin rule + /// + /// [left-top] https://drafts.csswg.org/css-page-3/#left-top-box-def + LeftTop => "left-top", + /// [`@left-middle`][left-middle] margin rule + /// + /// [left-middle] https://drafts.csswg.org/css-page-3/#left-middle-box-def + LeftMiddle => "left-middle", + /// [`@left-bottom`][left-bottom] margin rule + /// + /// [left-bottom] https://drafts.csswg.org/css-page-3/#left-bottom-box-def + LeftBottom => "left-bottom", + /// [`@right-top`][right-top] margin rule + /// + /// [right-top] https://drafts.csswg.org/css-page-3/#right-top-box-def + RightTop => "right-top", + /// [`@right-middle`][right-middle] margin rule + /// + /// [right-middle] https://drafts.csswg.org/css-page-3/#right-middle-box-def + RightMiddle => "right-middle", + /// [`@right-bottom`][right-bottom] margin rule + /// + /// [right-bottom] https://drafts.csswg.org/css-page-3/#right-bottom-box-def + RightBottom => "right-bottom", +} + +/// A [`@margin`][margin] rule. +/// +/// [margin]: https://drafts.csswg.org/css-page-3/#margin-at-rules +#[derive(Clone, Debug, ToShmem)] +pub struct MarginRule { + /// Type of this margin rule. + pub rule_type: MarginRuleType, + /// The declaration block this margin rule contains. + pub block: Arc<Locked<PropertyDeclarationBlock>>, + /// The source position this rule was found at. + pub source_location: SourceLocation, +} + +impl MarginRule { + /// 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 MarginRule { + /// Serialization of a margin-rule is not specced, this is adapted from how + /// page-rules and style-rules are serialized. + fn to_css(&self, guard: &SharedRwLockReadGuard, dest: &mut CssStringWriter) -> fmt::Result { + dest.write_str(self.rule_type.to_str())?; + dest.write_str(" { ")?; + let declaration_block = self.block.read_with(guard); + declaration_block.to_css(dest)?; + if !declaration_block.declarations().is_empty() { + dest.write_char(' ')?; + } + dest.write_char('}') + } +} + +impl DeepCloneWithLock for MarginRule { + fn deep_clone_with_lock( + &self, + lock: &SharedRwLock, + guard: &SharedRwLockReadGuard, + _params: &DeepCloneParams, + ) -> Self { + MarginRule { + rule_type: self.rule_type, + block: Arc::new(lock.wrap(self.block.read_with(&guard).clone())), + source_location: self.source_location.clone(), + } + } +} |