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Diffstat (limited to '')
| -rw-r--r-- | servo/components/style/values/computed/box.rs | 254 |
1 files changed, 254 insertions, 0 deletions
diff --git a/servo/components/style/values/computed/box.rs b/servo/components/style/values/computed/box.rs new file mode 100644 index 0000000000..e25cd10489 --- /dev/null +++ b/servo/components/style/values/computed/box.rs @@ -0,0 +1,254 @@ +/* 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/. */ + +//! Computed types for box properties. + +use crate::values::animated::{Animate, Procedure}; +use crate::values::computed::length::{LengthPercentage, NonNegativeLength}; +use crate::values::computed::{Context, Integer, ToComputedValue}; +use crate::values::generics::box_::{ + GenericContainIntrinsicSize, GenericLineClamp, GenericPerspective, GenericVerticalAlign, +}; +use crate::values::specified::box_ as specified; + +pub use crate::values::specified::box_::{ + Appearance, BaselineSource, BreakBetween, BreakWithin, Clear as SpecifiedClear, Contain, + ContainerName, ContainerType, ContentVisibility, Display, Float as SpecifiedFloat, Overflow, + OverflowAnchor, OverflowClipBox, OverscrollBehavior, ScrollSnapAlign, ScrollSnapAxis, + ScrollSnapStop, ScrollSnapStrictness, ScrollSnapType, ScrollbarGutter, TouchAction, WillChange, +}; + +/// A computed value for the `vertical-align` property. +pub type VerticalAlign = GenericVerticalAlign<LengthPercentage>; + +/// A computed value for the `contain-intrinsic-size` property. +pub type ContainIntrinsicSize = GenericContainIntrinsicSize<NonNegativeLength>; + +/// A computed value for the `line-clamp` property. +pub type LineClamp = GenericLineClamp<Integer>; + +impl Animate for LineClamp { + #[inline] + fn animate(&self, other: &Self, procedure: Procedure) -> Result<Self, ()> { + if self.is_none() != other.is_none() { + return Err(()); + } + if self.is_none() { + return Ok(Self::none()); + } + Ok(Self(self.0.animate(&other.0, procedure)?.max(1))) + } +} + +/// A computed value for the `perspective` property. +pub type Perspective = GenericPerspective<NonNegativeLength>; + +#[allow(missing_docs)] +#[cfg_attr(feature = "servo", derive(Deserialize, Serialize))] +#[derive( + Clone, + Copy, + Debug, + Eq, + FromPrimitive, + Hash, + MallocSizeOf, + Parse, + PartialEq, + SpecifiedValueInfo, + ToCss, + ToResolvedValue, +)] +#[repr(u8)] +/// A computed value for the `float` property. +pub enum Float { + Left, + Right, + None, +} + +impl Float { + /// Returns true if `self` is not `None`. + pub fn is_floating(self) -> bool { + self != Self::None + } +} + +impl ToComputedValue for SpecifiedFloat { + type ComputedValue = Float; + + #[inline] + fn to_computed_value(&self, context: &Context) -> Self::ComputedValue { + let ltr = context.style().writing_mode.is_bidi_ltr(); + // https://drafts.csswg.org/css-logical-props/#float-clear + match *self { + SpecifiedFloat::InlineStart => { + context + .rule_cache_conditions + .borrow_mut() + .set_writing_mode_dependency(context.builder.writing_mode); + if ltr { + Float::Left + } else { + Float::Right + } + }, + SpecifiedFloat::InlineEnd => { + context + .rule_cache_conditions + .borrow_mut() + .set_writing_mode_dependency(context.builder.writing_mode); + if ltr { + Float::Right + } else { + Float::Left + } + }, + SpecifiedFloat::Left => Float::Left, + SpecifiedFloat::Right => Float::Right, + SpecifiedFloat::None => Float::None, + } + } + + #[inline] + fn from_computed_value(computed: &Self::ComputedValue) -> SpecifiedFloat { + match *computed { + Float::Left => SpecifiedFloat::Left, + Float::Right => SpecifiedFloat::Right, + Float::None => SpecifiedFloat::None, + } + } +} + +#[allow(missing_docs)] +#[cfg_attr(feature = "servo", derive(Deserialize, Serialize))] +#[derive( + Clone, + Copy, + Debug, + Eq, + FromPrimitive, + Hash, + MallocSizeOf, + Parse, + PartialEq, + SpecifiedValueInfo, + ToCss, + ToResolvedValue, +)] +/// A computed value for the `clear` property. +#[repr(u8)] +pub enum Clear { + None, + Left, + Right, + Both, +} + +impl ToComputedValue for SpecifiedClear { + type ComputedValue = Clear; + + #[inline] + fn to_computed_value(&self, context: &Context) -> Self::ComputedValue { + let ltr = context.style().writing_mode.is_bidi_ltr(); + // https://drafts.csswg.org/css-logical-props/#float-clear + match *self { + SpecifiedClear::InlineStart => { + context + .rule_cache_conditions + .borrow_mut() + .set_writing_mode_dependency(context.builder.writing_mode); + if ltr { + Clear::Left + } else { + Clear::Right + } + }, + SpecifiedClear::InlineEnd => { + context + .rule_cache_conditions + .borrow_mut() + .set_writing_mode_dependency(context.builder.writing_mode); + if ltr { + Clear::Right + } else { + Clear::Left + } + }, + SpecifiedClear::None => Clear::None, + SpecifiedClear::Left => Clear::Left, + SpecifiedClear::Right => Clear::Right, + SpecifiedClear::Both => Clear::Both, + } + } + + #[inline] + fn from_computed_value(computed: &Self::ComputedValue) -> SpecifiedClear { + match *computed { + Clear::None => SpecifiedClear::None, + Clear::Left => SpecifiedClear::Left, + Clear::Right => SpecifiedClear::Right, + Clear::Both => SpecifiedClear::Both, + } + } +} + +/// A computed value for the `resize` property. +#[allow(missing_docs)] +#[cfg_attr(feature = "servo", derive(Deserialize, Serialize))] +#[derive(Clone, Copy, Debug, Eq, Hash, MallocSizeOf, Parse, PartialEq, ToCss, ToResolvedValue)] +#[repr(u8)] +pub enum Resize { + None, + Both, + Horizontal, + Vertical, +} + +impl ToComputedValue for specified::Resize { + type ComputedValue = Resize; + + #[inline] + fn to_computed_value(&self, context: &Context) -> Resize { + let is_vertical = context.style().writing_mode.is_vertical(); + match self { + specified::Resize::Inline => { + context + .rule_cache_conditions + .borrow_mut() + .set_writing_mode_dependency(context.builder.writing_mode); + if is_vertical { + Resize::Vertical + } else { + Resize::Horizontal + } + }, + specified::Resize::Block => { + context + .rule_cache_conditions + .borrow_mut() + .set_writing_mode_dependency(context.builder.writing_mode); + if is_vertical { + Resize::Horizontal + } else { + Resize::Vertical + } + }, + specified::Resize::None => Resize::None, + specified::Resize::Both => Resize::Both, + specified::Resize::Horizontal => Resize::Horizontal, + specified::Resize::Vertical => Resize::Vertical, + } + } + + #[inline] + fn from_computed_value(computed: &Resize) -> specified::Resize { + match computed { + Resize::None => specified::Resize::None, + Resize::Both => specified::Resize::Both, + Resize::Horizontal => specified::Resize::Horizontal, + Resize::Vertical => specified::Resize::Vertical, + } + } +} |