mirror of
https://github.com/servo/servo.git
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f76692035b
Signed-off-by: atbrakhi <atbrakhi@igalia.com> Co-authored-by: Martin Robinson <mrobinson@igalia.com>
700 lines
21 KiB
Rust
700 lines
21 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
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use std::convert::From;
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use std::fmt;
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use std::ops::{Add, AddAssign, Neg, Sub, SubAssign};
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use app_units::Au;
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use serde::Serialize;
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use style::logical_geometry::{BlockFlowDirection, InlineBaseDirection, WritingMode};
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use style::values::computed::{CSSPixelLength, LengthPercentage};
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use style::values::generics::length::GenericLengthPercentageOrAuto as AutoOr;
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use style::Zero;
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use style_traits::CSSPixel;
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use crate::ContainingBlock;
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pub type PhysicalPoint<U> = euclid::Point2D<U, CSSPixel>;
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pub type PhysicalSize<U> = euclid::Size2D<U, CSSPixel>;
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pub type PhysicalVec<U> = euclid::Vector2D<U, CSSPixel>;
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pub type PhysicalRect<U> = euclid::Rect<U, CSSPixel>;
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pub type PhysicalSides<U> = euclid::SideOffsets2D<U, CSSPixel>;
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pub type AuOrAuto = AutoOr<Au>;
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pub type LengthPercentageOrAuto<'a> = AutoOr<&'a LengthPercentage>;
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#[derive(Clone, Copy, PartialEq, Serialize)]
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pub struct LogicalVec2<T> {
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pub inline: T,
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pub block: T,
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}
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#[derive(Clone, Copy, Serialize)]
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pub struct LogicalRect<T> {
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pub start_corner: LogicalVec2<T>,
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pub size: LogicalVec2<T>,
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}
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#[derive(Clone, Copy, Debug, Serialize)]
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pub struct LogicalSides<T> {
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pub inline_start: T,
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pub inline_end: T,
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pub block_start: T,
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pub block_end: T,
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}
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impl<T: fmt::Debug> fmt::Debug for LogicalVec2<T> {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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// Not using f.debug_struct on purpose here, to keep {:?} output somewhat compact
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f.write_str("Vec2 { i: ")?;
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self.inline.fmt(f)?;
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f.write_str(", b: ")?;
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self.block.fmt(f)?;
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f.write_str(" }")
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}
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}
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impl<T: Clone> LogicalVec2<T> {
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pub fn from_physical_size(physical_size: &PhysicalSize<T>, mode: WritingMode) -> Self {
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// https://drafts.csswg.org/css-writing-modes/#logical-to-physical
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let (i, b) = if mode.is_horizontal() {
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(&physical_size.width, &physical_size.height)
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} else {
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(&physical_size.height, &physical_size.width)
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};
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LogicalVec2 {
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inline: i.clone(),
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block: b.clone(),
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}
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}
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pub fn map<U>(&self, f: impl Fn(&T) -> U) -> LogicalVec2<U> {
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LogicalVec2 {
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inline: f(&self.inline),
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block: f(&self.block),
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}
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}
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}
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impl<T: Add<Output = T> + Copy> Add<LogicalVec2<T>> for LogicalVec2<T> {
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type Output = LogicalVec2<T>;
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fn add(self, other: Self) -> Self::Output {
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LogicalVec2 {
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inline: self.inline + other.inline,
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block: self.block + other.block,
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}
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}
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}
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impl<T: Sub<Output = T> + Copy> Sub<LogicalVec2<T>> for LogicalVec2<T> {
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type Output = LogicalVec2<T>;
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fn sub(self, other: Self) -> Self::Output {
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LogicalVec2 {
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inline: self.inline - other.inline,
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block: self.block - other.block,
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}
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}
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}
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impl<T: AddAssign<T> + Copy> AddAssign<LogicalVec2<T>> for LogicalVec2<T> {
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fn add_assign(&mut self, other: LogicalVec2<T>) {
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self.inline += other.inline;
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self.block += other.block;
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}
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}
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impl<T: SubAssign<T> + Copy> SubAssign<LogicalVec2<T>> for LogicalVec2<T> {
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fn sub_assign(&mut self, other: LogicalVec2<T>) {
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self.inline -= other.inline;
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self.block -= other.block;
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}
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}
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impl<T: Neg<Output = T> + Copy> Neg for LogicalVec2<T> {
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type Output = LogicalVec2<T>;
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fn neg(self) -> Self::Output {
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Self {
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inline: -self.inline,
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block: -self.block,
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}
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}
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}
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impl<T: Zero> LogicalVec2<T> {
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pub fn zero() -> Self {
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Self {
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inline: T::zero(),
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block: T::zero(),
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}
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}
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}
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impl<T: Clone> LogicalVec2<AutoOr<T>> {
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pub fn auto_is(&self, f: impl Fn() -> T) -> LogicalVec2<T> {
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self.map(|t| t.auto_is(&f))
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}
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}
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impl LogicalVec2<LengthPercentageOrAuto<'_>> {
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pub(crate) fn percentages_relative_to(
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&self,
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containing_block: &ContainingBlock,
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) -> LogicalVec2<AuOrAuto> {
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LogicalVec2 {
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inline: self
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.inline
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.map(|value| value.to_used_value(containing_block.inline_size)),
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block: {
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let containing_block_block_size =
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containing_block.block_size.non_auto().map(Into::into);
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self.block
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.non_auto()
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.and_then(|value| value.maybe_to_used_value(containing_block_block_size))
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.map(AuOrAuto::LengthPercentage)
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.unwrap_or(AuOrAuto::Auto)
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},
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}
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}
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}
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impl LogicalVec2<LengthPercentageOrAuto<'_>> {
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pub(crate) fn percentages_relative_to_basis(
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&self,
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basis: &LogicalVec2<Au>,
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) -> LogicalVec2<AuOrAuto> {
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LogicalVec2 {
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inline: self.inline.map(|value| value.to_used_value(basis.inline)),
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block: self.block.map(|value| value.to_used_value(basis.block)),
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}
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}
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}
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impl LogicalVec2<LengthPercentageOrAuto<'_>> {
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pub(crate) fn maybe_percentages_relative_to_basis(
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&self,
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basis: &LogicalVec2<Option<Au>>,
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) -> LogicalVec2<AuOrAuto> {
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let basis = basis.map(|value| value.map(Into::into));
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LogicalVec2 {
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inline: self
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.inline
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.non_auto()
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.and_then(|value| value.maybe_to_used_value(basis.inline))
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.map(AuOrAuto::LengthPercentage)
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.unwrap_or(AuOrAuto::Auto),
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block: self
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.block
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.non_auto()
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.and_then(|value| value.maybe_to_used_value(basis.block))
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.map(AuOrAuto::LengthPercentage)
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.unwrap_or(AuOrAuto::Auto),
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}
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}
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}
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impl LogicalVec2<Option<&'_ LengthPercentage>> {
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pub(crate) fn percentages_relative_to(
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&self,
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containing_block: &ContainingBlock,
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) -> LogicalVec2<Option<Au>> {
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LogicalVec2 {
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inline: self
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.inline
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.map(|lp| lp.to_used_value(containing_block.inline_size)),
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block: self.block.and_then(|lp| {
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lp.maybe_to_used_value(containing_block.block_size.map(Into::into).non_auto())
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}),
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}
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}
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}
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impl LogicalVec2<Option<&'_ LengthPercentage>> {
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pub(crate) fn maybe_percentages_relative_to_basis(
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&self,
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basis: &LogicalVec2<Option<Au>>,
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) -> LogicalVec2<Option<Au>> {
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LogicalVec2 {
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inline: self
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.inline
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.and_then(|v| v.maybe_to_used_value(basis.inline.map(Into::into))),
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block: self
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.block
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.and_then(|v| v.maybe_to_used_value(basis.block.map(Into::into))),
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}
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}
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}
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impl<T: Zero> LogicalRect<T> {
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pub fn zero() -> Self {
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Self {
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start_corner: LogicalVec2::zero(),
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size: LogicalVec2::zero(),
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}
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}
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}
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impl fmt::Debug for LogicalRect<Au> {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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write!(
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f,
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"Rect(i{}×b{} @ (i{},b{}))",
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self.size.inline.to_f32_px(),
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self.size.block.to_f32_px(),
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self.start_corner.inline.to_f32_px(),
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self.start_corner.block.to_f32_px(),
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)
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}
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}
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impl<T: Clone> LogicalVec2<T> {
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pub fn to_physical_size(&self, mode: WritingMode) -> PhysicalSize<T> {
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// https://drafts.csswg.org/css-writing-modes/#logical-to-physical
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let (x, y) = if mode.is_horizontal() {
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(&self.inline, &self.block)
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} else {
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(&self.block, &self.inline)
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};
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PhysicalSize::new(x.clone(), y.clone())
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}
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}
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impl<T: Copy + Neg<Output = T>> LogicalVec2<T> {
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pub fn to_physical_vector(&self, mode: WritingMode) -> PhysicalVec<T> {
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if mode.is_horizontal() {
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if mode.is_bidi_ltr() {
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PhysicalVec::new(self.inline, self.block)
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} else {
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PhysicalVec::new(-self.inline, self.block)
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}
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} else if mode.is_inline_tb() {
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PhysicalVec::new(self.block, self.inline)
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} else {
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PhysicalVec::new(-self.block, self.inline)
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}
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}
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}
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impl LogicalVec2<Au> {
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#[inline]
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pub fn to_physical_point(
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&self,
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containing_block: Option<&ContainingBlock>,
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) -> PhysicalPoint<Au> {
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let mode = containing_block.map_or_else(WritingMode::horizontal_tb, |containing_block| {
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containing_block.style.writing_mode
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});
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if mode.is_vertical() {
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// TODO: Bottom-to-top writing modes are not supported yet.
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PhysicalPoint::new(self.block, self.inline)
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} else {
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let y = self.block;
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let x = match containing_block {
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Some(containing_block) if !mode.is_bidi_ltr() => {
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containing_block.inline_size - self.inline
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},
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_ => self.inline,
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};
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PhysicalPoint::new(x, y)
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}
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}
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}
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impl<T: Clone> LogicalSides<T> {
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pub fn from_physical(sides: &PhysicalSides<T>, mode: WritingMode) -> Self {
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// https://drafts.csswg.org/css-writing-modes/#logical-to-physical
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let block_flow = mode.block_flow_direction();
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let (bs, be) = match mode.block_flow_direction() {
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BlockFlowDirection::TopToBottom => (&sides.top, &sides.bottom),
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BlockFlowDirection::RightToLeft => (&sides.right, &sides.left),
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BlockFlowDirection::LeftToRight => (&sides.left, &sides.right),
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};
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use BlockFlowDirection::TopToBottom;
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let (is, ie) = match (block_flow, mode.inline_base_direction()) {
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(TopToBottom, InlineBaseDirection::LeftToRight) => (&sides.left, &sides.right),
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(TopToBottom, InlineBaseDirection::RightToLeft) => (&sides.right, &sides.left),
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(_, InlineBaseDirection::LeftToRight) => (&sides.top, &sides.bottom),
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(_, InlineBaseDirection::RightToLeft) => (&sides.bottom, &sides.top),
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};
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LogicalSides {
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inline_start: is.clone(),
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inline_end: ie.clone(),
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block_start: bs.clone(),
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block_end: be.clone(),
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}
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}
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}
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impl<T> LogicalSides<T> {
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pub fn map<U>(&self, f: impl Fn(&T) -> U) -> LogicalSides<U> {
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LogicalSides {
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inline_start: f(&self.inline_start),
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inline_end: f(&self.inline_end),
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block_start: f(&self.block_start),
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block_end: f(&self.block_end),
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}
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}
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pub fn map_inline_and_block_axes<U>(
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&self,
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inline_f: impl Fn(&T) -> U,
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block_f: impl Fn(&T) -> U,
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) -> LogicalSides<U> {
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LogicalSides {
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inline_start: inline_f(&self.inline_start),
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inline_end: inline_f(&self.inline_end),
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block_start: block_f(&self.block_start),
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block_end: block_f(&self.block_end),
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}
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}
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pub fn inline_sum(&self) -> T::Output
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where
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T: Add + Copy,
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{
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self.inline_start + self.inline_end
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}
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pub fn block_sum(&self) -> T::Output
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where
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T: Add + Copy,
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{
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self.block_start + self.block_end
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}
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pub fn sum(&self) -> LogicalVec2<T::Output>
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where
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T: Add + Copy,
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{
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LogicalVec2 {
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inline: self.inline_sum(),
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block: self.block_sum(),
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}
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}
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pub fn to_physical(&self, mode: WritingMode) -> PhysicalSides<T>
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where
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T: Clone,
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{
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let top;
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let right;
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let bottom;
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let left;
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if mode.is_vertical() {
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if mode.is_vertical_lr() {
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left = self.block_start.clone();
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right = self.block_end.clone();
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} else {
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right = self.block_start.clone();
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left = self.block_end.clone();
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}
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if mode.is_inline_tb() {
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top = self.inline_start.clone();
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bottom = self.inline_end.clone();
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} else {
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bottom = self.inline_start.clone();
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top = self.inline_end.clone();
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}
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} else {
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top = self.block_start.clone();
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bottom = self.block_end.clone();
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if mode.is_bidi_ltr() {
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left = self.inline_start.clone();
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right = self.inline_end.clone();
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} else {
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right = self.inline_start.clone();
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left = self.inline_end.clone();
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}
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}
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PhysicalSides::new(top, right, bottom, left)
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}
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}
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impl<T: Copy> LogicalSides<T> {
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pub fn start_offset(&self) -> LogicalVec2<T> {
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LogicalVec2 {
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inline: self.inline_start,
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block: self.block_start,
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}
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}
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}
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impl LogicalSides<&'_ LengthPercentage> {
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pub fn percentages_relative_to(&self, basis: Au) -> LogicalSides<Au> {
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self.map(|value| value.to_used_value(basis))
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}
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}
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impl LogicalSides<LengthPercentageOrAuto<'_>> {
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pub fn percentages_relative_to(&self, basis: Au) -> LogicalSides<AuOrAuto> {
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self.map(|value| value.map(|value| value.to_used_value(basis)))
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}
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}
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impl<T: Clone> LogicalSides<AutoOr<T>> {
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pub fn auto_is(&self, f: impl Fn() -> T) -> LogicalSides<T> {
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self.map(|s| s.auto_is(&f))
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}
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}
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impl<T: Add<Output = T> + Copy> Add<LogicalSides<T>> for LogicalSides<T> {
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type Output = LogicalSides<T>;
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fn add(self, other: Self) -> Self::Output {
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LogicalSides {
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inline_start: self.inline_start + other.inline_start,
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inline_end: self.inline_end + other.inline_end,
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block_start: self.block_start + other.block_start,
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block_end: self.block_end + other.block_end,
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}
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}
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}
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impl<T: Sub<Output = T> + Copy> Sub<LogicalSides<T>> for LogicalSides<T> {
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type Output = LogicalSides<T>;
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fn sub(self, other: Self) -> Self::Output {
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LogicalSides {
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inline_start: self.inline_start - other.inline_start,
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inline_end: self.inline_end - other.inline_end,
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block_start: self.block_start - other.block_start,
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block_end: self.block_end - other.block_end,
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}
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}
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}
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impl<T: Neg<Output = T> + Copy> Neg for LogicalSides<T> {
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type Output = LogicalSides<T>;
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fn neg(self) -> Self::Output {
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Self {
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inline_start: -self.inline_start,
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inline_end: -self.inline_end,
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block_start: -self.block_start,
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block_end: -self.block_end,
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}
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}
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}
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impl<T: Zero> LogicalSides<T> {
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pub(crate) fn zero() -> LogicalSides<T> {
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Self {
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inline_start: T::zero(),
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inline_end: T::zero(),
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block_start: T::zero(),
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block_end: T::zero(),
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}
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}
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}
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impl From<LogicalSides<CSSPixelLength>> for LogicalSides<Au> {
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fn from(value: LogicalSides<CSSPixelLength>) -> Self {
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Self {
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inline_start: value.inline_start.into(),
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inline_end: value.inline_end.into(),
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block_start: value.block_start.into(),
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block_end: value.block_end.into(),
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}
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}
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}
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|
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impl From<LogicalSides<Au>> for LogicalSides<CSSPixelLength> {
|
||
fn from(value: LogicalSides<Au>) -> Self {
|
||
Self {
|
||
inline_start: value.inline_start.into(),
|
||
inline_end: value.inline_end.into(),
|
||
block_start: value.block_start.into(),
|
||
block_end: value.block_end.into(),
|
||
}
|
||
}
|
||
}
|
||
|
||
impl<T> LogicalRect<T> {
|
||
pub fn max_inline_position(&self) -> T
|
||
where
|
||
T: Add<Output = T> + Copy,
|
||
{
|
||
self.start_corner.inline + self.size.inline
|
||
}
|
||
|
||
pub fn max_block_position(&self) -> T
|
||
where
|
||
T: Add<Output = T> + Copy,
|
||
{
|
||
self.start_corner.block + self.size.block
|
||
}
|
||
|
||
pub fn inflate(&self, sides: &LogicalSides<T>) -> Self
|
||
where
|
||
T: Add<Output = T> + Copy,
|
||
T: Sub<Output = T> + Copy,
|
||
{
|
||
Self {
|
||
start_corner: LogicalVec2 {
|
||
inline: self.start_corner.inline - sides.inline_start,
|
||
block: self.start_corner.block - sides.block_start,
|
||
},
|
||
size: LogicalVec2 {
|
||
inline: self.size.inline + sides.inline_sum(),
|
||
block: self.size.block + sides.block_sum(),
|
||
},
|
||
}
|
||
}
|
||
|
||
pub fn deflate(&self, sides: &LogicalSides<T>) -> Self
|
||
where
|
||
T: Add<Output = T> + Copy,
|
||
T: Sub<Output = T> + Copy,
|
||
{
|
||
LogicalRect {
|
||
start_corner: LogicalVec2 {
|
||
inline: self.start_corner.inline + sides.inline_start,
|
||
block: self.start_corner.block + sides.block_start,
|
||
},
|
||
size: LogicalVec2 {
|
||
inline: self.size.inline - sides.inline_sum(),
|
||
block: self.size.block - sides.block_sum(),
|
||
},
|
||
}
|
||
}
|
||
}
|
||
|
||
impl LogicalRect<Au> {
|
||
pub fn to_physical(&self, containing_block: Option<&ContainingBlock<'_>>) -> PhysicalRect<Au> {
|
||
let mode = containing_block.map_or_else(WritingMode::horizontal_tb, |containing_block| {
|
||
containing_block.style.writing_mode
|
||
});
|
||
let (x, y, width, height) = if mode.is_vertical() {
|
||
// TODO: Bottom-to-top writing modes are not supported.
|
||
(
|
||
self.start_corner.block,
|
||
self.start_corner.inline,
|
||
self.size.block,
|
||
self.size.inline,
|
||
)
|
||
} else {
|
||
let y = self.start_corner.block;
|
||
let x = match containing_block {
|
||
Some(containing_block) if !mode.is_bidi_ltr() => {
|
||
containing_block.inline_size - self.max_inline_position()
|
||
},
|
||
_ => self.start_corner.inline,
|
||
};
|
||
(x, y, self.size.inline, self.size.block)
|
||
};
|
||
|
||
PhysicalRect::new(PhysicalPoint::new(x, y), PhysicalSize::new(width, height))
|
||
}
|
||
}
|
||
|
||
impl From<LogicalVec2<CSSPixelLength>> for LogicalVec2<Au> {
|
||
fn from(value: LogicalVec2<CSSPixelLength>) -> Self {
|
||
LogicalVec2 {
|
||
inline: value.inline.into(),
|
||
block: value.block.into(),
|
||
}
|
||
}
|
||
}
|
||
|
||
impl From<LogicalVec2<Au>> for LogicalVec2<CSSPixelLength> {
|
||
fn from(value: LogicalVec2<Au>) -> Self {
|
||
LogicalVec2 {
|
||
inline: value.inline.into(),
|
||
block: value.block.into(),
|
||
}
|
||
}
|
||
}
|
||
|
||
impl From<LogicalRect<Au>> for LogicalRect<CSSPixelLength> {
|
||
fn from(value: LogicalRect<Au>) -> Self {
|
||
LogicalRect {
|
||
start_corner: value.start_corner.into(),
|
||
size: value.size.into(),
|
||
}
|
||
}
|
||
}
|
||
|
||
impl From<LogicalRect<CSSPixelLength>> for LogicalRect<Au> {
|
||
fn from(value: LogicalRect<CSSPixelLength>) -> Self {
|
||
LogicalRect {
|
||
start_corner: value.start_corner.into(),
|
||
size: value.size.into(),
|
||
}
|
||
}
|
||
}
|
||
|
||
pub(crate) trait ToLogical<Unit, LogicalType> {
|
||
fn to_logical(&self, writing_mode: WritingMode) -> LogicalType;
|
||
}
|
||
|
||
impl<Unit: Copy> ToLogical<Unit, LogicalVec2<Unit>> for PhysicalSize<Unit> {
|
||
fn to_logical(&self, writing_mode: WritingMode) -> LogicalVec2<Unit> {
|
||
LogicalVec2::from_physical_size(self, writing_mode)
|
||
}
|
||
}
|
||
|
||
impl<Unit: Copy> ToLogical<Unit, LogicalSides<Unit>> for PhysicalSides<Unit> {
|
||
fn to_logical(&self, writing_mode: WritingMode) -> LogicalSides<Unit> {
|
||
LogicalSides::from_physical(self, writing_mode)
|
||
}
|
||
}
|
||
|
||
pub(crate) trait ToLogicalWithContainingBlock<LogicalType> {
|
||
fn to_logical(&self, containing_block: &ContainingBlock) -> LogicalType;
|
||
}
|
||
|
||
impl ToLogicalWithContainingBlock<LogicalVec2<Au>> for PhysicalPoint<Au> {
|
||
fn to_logical(&self, containing_block: &ContainingBlock) -> LogicalVec2<Au> {
|
||
let writing_mode = containing_block.style.writing_mode;
|
||
// TODO: Bottom-to-top and right-to-left vertical writing modes are not supported yet.
|
||
if writing_mode.is_vertical() {
|
||
LogicalVec2 {
|
||
inline: self.y,
|
||
block: self.x,
|
||
}
|
||
} else {
|
||
LogicalVec2 {
|
||
inline: if writing_mode.is_bidi_ltr() {
|
||
self.x
|
||
} else {
|
||
containing_block.inline_size - self.x
|
||
},
|
||
block: self.y,
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
impl ToLogicalWithContainingBlock<LogicalRect<Au>> for PhysicalRect<Au> {
|
||
fn to_logical(&self, containing_block: &ContainingBlock) -> LogicalRect<Au> {
|
||
let inline_start;
|
||
let block_start;
|
||
let inline;
|
||
let block;
|
||
|
||
let writing_mode = containing_block.style.writing_mode;
|
||
if writing_mode.is_vertical() {
|
||
// TODO: Bottom-to-top and right-to-left vertical writing modes are not supported yet.
|
||
inline = self.size.height;
|
||
block = self.size.width;
|
||
block_start = self.origin.x;
|
||
inline_start = self.origin.y;
|
||
} else {
|
||
inline = self.size.width;
|
||
block = self.size.height;
|
||
block_start = self.origin.y;
|
||
if writing_mode.is_bidi_ltr() {
|
||
inline_start = self.origin.x;
|
||
} else {
|
||
inline_start = containing_block.inline_size - (self.origin.x + self.size.width);
|
||
}
|
||
}
|
||
LogicalRect {
|
||
start_corner: LogicalVec2 {
|
||
inline: inline_start,
|
||
block: block_start,
|
||
},
|
||
size: LogicalVec2 { inline, block },
|
||
}
|
||
}
|
||
}
|