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cf4510011f
This conversion can lead to floating point errors and extra work when computing animations. Avoiding it allows animation-iteration-count-009.html to pass.
119 lines
2.7 KiB
Rust
119 lines
2.7 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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//! Generic types for CSS Easing Functions.
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//! https://drafts.csswg.org/css-easing/#timing-functions
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use crate::parser::ParserContext;
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/// A generic easing function.
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#[derive(
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Clone,
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Copy,
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Debug,
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MallocSizeOf,
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PartialEq,
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SpecifiedValueInfo,
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ToComputedValue,
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ToCss,
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ToResolvedValue,
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ToShmem,
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)]
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#[value_info(ty = "TIMING_FUNCTION")]
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#[repr(u8, C)]
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pub enum TimingFunction<Integer, Number> {
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/// `linear | ease | ease-in | ease-out | ease-in-out`
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Keyword(TimingKeyword),
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/// `cubic-bezier(<number>, <number>, <number>, <number>)`
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#[allow(missing_docs)]
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#[css(comma, function)]
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CubicBezier {
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x1: Number,
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y1: Number,
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x2: Number,
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y2: Number,
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},
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/// `step-start | step-end | steps(<integer>, [ <step-position> ]?)`
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/// `<step-position> = jump-start | jump-end | jump-none | jump-both | start | end`
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#[css(comma, function)]
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#[value_info(other_values = "step-start,step-end")]
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Steps(Integer, #[css(skip_if = "is_end")] StepPosition),
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}
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#[allow(missing_docs)]
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#[cfg_attr(feature = "servo", derive(Deserialize, Serialize))]
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#[derive(
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Clone,
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Copy,
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Debug,
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Eq,
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MallocSizeOf,
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Parse,
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PartialEq,
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SpecifiedValueInfo,
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ToComputedValue,
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ToCss,
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ToResolvedValue,
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ToShmem,
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)]
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#[repr(u8)]
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pub enum TimingKeyword {
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Linear,
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Ease,
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EaseIn,
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EaseOut,
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EaseInOut,
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}
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#[cfg(feature = "gecko")]
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fn step_position_jump_enabled(_context: &ParserContext) -> bool {
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static_prefs::pref!("layout.css.step-position-jump.enabled")
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}
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#[cfg(feature = "servo")]
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fn step_position_jump_enabled(_context: &ParserContext) -> bool {
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false
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}
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#[allow(missing_docs)]
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#[cfg_attr(feature = "servo", derive(Deserialize, Serialize))]
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#[derive(
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Clone,
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Copy,
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Debug,
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Eq,
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MallocSizeOf,
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Parse,
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PartialEq,
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ToComputedValue,
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ToCss,
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ToResolvedValue,
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ToShmem,
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)]
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#[repr(u8)]
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pub enum StepPosition {
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#[parse(condition = "step_position_jump_enabled")]
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JumpStart,
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#[parse(condition = "step_position_jump_enabled")]
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JumpEnd,
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#[parse(condition = "step_position_jump_enabled")]
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JumpNone,
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#[parse(condition = "step_position_jump_enabled")]
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JumpBoth,
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Start,
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End,
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}
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#[inline]
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fn is_end(position: &StepPosition) -> bool {
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*position == StepPosition::JumpEnd || *position == StepPosition::End
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}
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impl<Integer, Number> TimingFunction<Integer, Number> {
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/// `ease`
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#[inline]
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pub fn ease() -> Self {
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TimingFunction::Keyword(TimingKeyword::Ease)
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}
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}
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