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depend on dioxus(and bevy)-maintained fork of stretch (taffy) (#4716)
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# Objective

DioxusLabs and Bevy have taken over maintaining what was our abandoned ui layout dependency [stretch](https://github.com/vislyhq/stretch). Dioxus' fork has had a lot of work done on it by @alice-i-cecile, @Weibye , @jkelleyrtp, @mockersf, @HackerFoo, @TimJentzsch and a dozen other contributors and now is in much better shape than stretch was. The updated crate is called taffy and is available on github [here](https://github.com/DioxusLabs/taffy) ([taffy](https://crates.io/crates/taffy) on crates.io). The goal of this PR is to replace stretch v0.3.2 with taffy v0.1.0.

## Solution

I changed the bevy_ui Cargo.toml to depend on taffy instead of stretch and fixed all the errors rustc complained about.

---

## Changelog

Changed bevy_ui layout dependency from stretch to taffy (the maintained fork of stretch).

fixes #677

## Migration Guide

The public api of taffy is different from that of stretch so please advise me on what to do here @alice-i-cecile.
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@colepoirier
colepoirier committed Jun 21, 2022
1 parent 114d169 commit 86dd6f0
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6 changes: 4 additions & 2 deletions crates/bevy_ui/Cargo.toml
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Original file line number Diff line number Diff line change
Expand Up @@ -19,7 +19,9 @@ bevy_hierarchy = { path = "../bevy_hierarchy", version = "0.8.0-dev" }
bevy_input = { path = "../bevy_input", version = "0.8.0-dev" }
bevy_log = { path = "../bevy_log", version = "0.8.0-dev" }
bevy_math = { path = "../bevy_math", version = "0.8.0-dev" }
bevy_reflect = { path = "../bevy_reflect", version = "0.8.0-dev", features = ["bevy"] }
bevy_reflect = { path = "../bevy_reflect", version = "0.8.0-dev", features = [
"bevy",
] }
bevy_render = { path = "../bevy_render", version = "0.8.0-dev" }
bevy_sprite = { path = "../bevy_sprite", version = "0.8.0-dev" }
bevy_text = { path = "../bevy_text", version = "0.8.0-dev" }
Expand All @@ -28,7 +30,7 @@ bevy_window = { path = "../bevy_window", version = "0.8.0-dev" }
bevy_utils = { path = "../bevy_utils", version = "0.8.0-dev" }

# other
stretch = "0.3.2"
taffy = "0.1.0"
serde = { version = "1", features = ["derive"] }
smallvec = { version = "1.6", features = ["union", "const_generics"] }
bytemuck = { version = "1.5", features = ["derive"] }
130 changes: 59 additions & 71 deletions crates/bevy_ui/src/flex/convert.rs
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Original file line number Diff line number Diff line change
@@ -1,13 +1,13 @@
use crate::{
AlignContent, AlignItems, AlignSelf, Direction, Display, FlexDirection, FlexWrap,
JustifyContent, PositionType, Size, Style, UiRect, Val,
AlignContent, AlignItems, AlignSelf, Display, FlexDirection, FlexWrap, JustifyContent,
PositionType, Size, Style, UiRect, Val,
};

pub fn from_rect(
scale_factor: f64,
rect: UiRect<Val>,
) -> stretch::geometry::Rect<stretch::style::Dimension> {
stretch::geometry::Rect {
) -> taffy::geometry::Rect<taffy::style::Dimension> {
taffy::geometry::Rect {
start: from_val(scale_factor, rect.left),
end: from_val(scale_factor, rect.right),
// NOTE: top and bottom are intentionally flipped. stretch has a flipped y-axis
Expand All @@ -16,8 +16,8 @@ pub fn from_rect(
}
}

pub fn from_f32_size(scale_factor: f64, size: Size<f32>) -> stretch::geometry::Size<f32> {
stretch::geometry::Size {
pub fn from_f32_size(scale_factor: f64, size: Size<f32>) -> taffy::geometry::Size<f32> {
taffy::geometry::Size {
width: (scale_factor * size.width as f64) as f32,
height: (scale_factor * size.height as f64) as f32,
}
Expand All @@ -26,19 +26,17 @@ pub fn from_f32_size(scale_factor: f64, size: Size<f32>) -> stretch::geometry::S
pub fn from_val_size(
scale_factor: f64,
size: Size<Val>,
) -> stretch::geometry::Size<stretch::style::Dimension> {
stretch::geometry::Size {
) -> taffy::geometry::Size<taffy::style::Dimension> {
taffy::geometry::Size {
width: from_val(scale_factor, size.width),
height: from_val(scale_factor, size.height),
}
}

pub fn from_style(scale_factor: f64, value: &Style) -> stretch::style::Style {
stretch::style::Style {
overflow: stretch::style::Overflow::Visible,
pub fn from_style(scale_factor: f64, value: &Style) -> taffy::style::Style {
taffy::style::Style {
display: value.display.into(),
position_type: value.position_type.into(),
direction: value.direction.into(),
flex_direction: value.flex_direction.into(),
flex_wrap: value.flex_wrap.into(),
align_items: value.align_items.into(),
Expand All @@ -56,117 +54,107 @@ pub fn from_style(scale_factor: f64, value: &Style) -> stretch::style::Style {
min_size: from_val_size(scale_factor, value.min_size),
max_size: from_val_size(scale_factor, value.max_size),
aspect_ratio: match value.aspect_ratio {
Some(value) => stretch::number::Number::Defined(value),
None => stretch::number::Number::Undefined,
Some(value) => taffy::number::Number::Defined(value),
None => taffy::number::Number::Undefined,
},
}
}

pub fn from_val(scale_factor: f64, val: Val) -> stretch::style::Dimension {
pub fn from_val(scale_factor: f64, val: Val) -> taffy::style::Dimension {
match val {
Val::Auto => stretch::style::Dimension::Auto,
Val::Percent(value) => stretch::style::Dimension::Percent(value / 100.0),
Val::Px(value) => stretch::style::Dimension::Points((scale_factor * value as f64) as f32),
Val::Undefined => stretch::style::Dimension::Undefined,
Val::Auto => taffy::style::Dimension::Auto,
Val::Percent(value) => taffy::style::Dimension::Percent(value / 100.0),
Val::Px(value) => taffy::style::Dimension::Points((scale_factor * value as f64) as f32),
Val::Undefined => taffy::style::Dimension::Undefined,
}
}

impl From<AlignItems> for stretch::style::AlignItems {
impl From<AlignItems> for taffy::style::AlignItems {
fn from(value: AlignItems) -> Self {
match value {
AlignItems::FlexStart => stretch::style::AlignItems::FlexStart,
AlignItems::FlexEnd => stretch::style::AlignItems::FlexEnd,
AlignItems::Center => stretch::style::AlignItems::Center,
AlignItems::Baseline => stretch::style::AlignItems::Baseline,
AlignItems::Stretch => stretch::style::AlignItems::Stretch,
AlignItems::FlexStart => taffy::style::AlignItems::FlexStart,
AlignItems::FlexEnd => taffy::style::AlignItems::FlexEnd,
AlignItems::Center => taffy::style::AlignItems::Center,
AlignItems::Baseline => taffy::style::AlignItems::Baseline,
AlignItems::Stretch => taffy::style::AlignItems::Stretch,
}
}
}

impl From<AlignSelf> for stretch::style::AlignSelf {
impl From<AlignSelf> for taffy::style::AlignSelf {
fn from(value: AlignSelf) -> Self {
match value {
AlignSelf::Auto => stretch::style::AlignSelf::Auto,
AlignSelf::FlexStart => stretch::style::AlignSelf::FlexStart,
AlignSelf::FlexEnd => stretch::style::AlignSelf::FlexEnd,
AlignSelf::Center => stretch::style::AlignSelf::Center,
AlignSelf::Baseline => stretch::style::AlignSelf::Baseline,
AlignSelf::Stretch => stretch::style::AlignSelf::Stretch,
AlignSelf::Auto => taffy::style::AlignSelf::Auto,
AlignSelf::FlexStart => taffy::style::AlignSelf::FlexStart,
AlignSelf::FlexEnd => taffy::style::AlignSelf::FlexEnd,
AlignSelf::Center => taffy::style::AlignSelf::Center,
AlignSelf::Baseline => taffy::style::AlignSelf::Baseline,
AlignSelf::Stretch => taffy::style::AlignSelf::Stretch,
}
}
}

impl From<AlignContent> for stretch::style::AlignContent {
impl From<AlignContent> for taffy::style::AlignContent {
fn from(value: AlignContent) -> Self {
match value {
AlignContent::FlexStart => stretch::style::AlignContent::FlexStart,
AlignContent::FlexEnd => stretch::style::AlignContent::FlexEnd,
AlignContent::Center => stretch::style::AlignContent::Center,
AlignContent::Stretch => stretch::style::AlignContent::Stretch,
AlignContent::SpaceBetween => stretch::style::AlignContent::SpaceBetween,
AlignContent::SpaceAround => stretch::style::AlignContent::SpaceAround,
AlignContent::FlexStart => taffy::style::AlignContent::FlexStart,
AlignContent::FlexEnd => taffy::style::AlignContent::FlexEnd,
AlignContent::Center => taffy::style::AlignContent::Center,
AlignContent::Stretch => taffy::style::AlignContent::Stretch,
AlignContent::SpaceBetween => taffy::style::AlignContent::SpaceBetween,
AlignContent::SpaceAround => taffy::style::AlignContent::SpaceAround,
}
}
}

impl From<Direction> for stretch::style::Direction {
fn from(value: Direction) -> Self {
match value {
Direction::Inherit => stretch::style::Direction::Inherit,
Direction::LeftToRight => stretch::style::Direction::LTR,
Direction::RightToLeft => stretch::style::Direction::RTL,
}
}
}

impl From<Display> for stretch::style::Display {
impl From<Display> for taffy::style::Display {
fn from(value: Display) -> Self {
match value {
Display::Flex => stretch::style::Display::Flex,
Display::None => stretch::style::Display::None,
Display::Flex => taffy::style::Display::Flex,
Display::None => taffy::style::Display::None,
}
}
}

impl From<FlexDirection> for stretch::style::FlexDirection {
impl From<FlexDirection> for taffy::style::FlexDirection {
fn from(value: FlexDirection) -> Self {
match value {
FlexDirection::Row => stretch::style::FlexDirection::Row,
FlexDirection::Column => stretch::style::FlexDirection::Column,
FlexDirection::RowReverse => stretch::style::FlexDirection::RowReverse,
FlexDirection::ColumnReverse => stretch::style::FlexDirection::ColumnReverse,
FlexDirection::Row => taffy::style::FlexDirection::Row,
FlexDirection::Column => taffy::style::FlexDirection::Column,
FlexDirection::RowReverse => taffy::style::FlexDirection::RowReverse,
FlexDirection::ColumnReverse => taffy::style::FlexDirection::ColumnReverse,
}
}
}

impl From<JustifyContent> for stretch::style::JustifyContent {
impl From<JustifyContent> for taffy::style::JustifyContent {
fn from(value: JustifyContent) -> Self {
match value {
JustifyContent::FlexStart => stretch::style::JustifyContent::FlexStart,
JustifyContent::FlexEnd => stretch::style::JustifyContent::FlexEnd,
JustifyContent::Center => stretch::style::JustifyContent::Center,
JustifyContent::SpaceBetween => stretch::style::JustifyContent::SpaceBetween,
JustifyContent::SpaceAround => stretch::style::JustifyContent::SpaceAround,
JustifyContent::SpaceEvenly => stretch::style::JustifyContent::SpaceEvenly,
JustifyContent::FlexStart => taffy::style::JustifyContent::FlexStart,
JustifyContent::FlexEnd => taffy::style::JustifyContent::FlexEnd,
JustifyContent::Center => taffy::style::JustifyContent::Center,
JustifyContent::SpaceBetween => taffy::style::JustifyContent::SpaceBetween,
JustifyContent::SpaceAround => taffy::style::JustifyContent::SpaceAround,
JustifyContent::SpaceEvenly => taffy::style::JustifyContent::SpaceEvenly,
}
}
}

impl From<PositionType> for stretch::style::PositionType {
impl From<PositionType> for taffy::style::PositionType {
fn from(value: PositionType) -> Self {
match value {
PositionType::Relative => stretch::style::PositionType::Relative,
PositionType::Absolute => stretch::style::PositionType::Absolute,
PositionType::Relative => taffy::style::PositionType::Relative,
PositionType::Absolute => taffy::style::PositionType::Absolute,
}
}
}

impl From<FlexWrap> for stretch::style::FlexWrap {
impl From<FlexWrap> for taffy::style::FlexWrap {
fn from(value: FlexWrap) -> Self {
match value {
FlexWrap::NoWrap => stretch::style::FlexWrap::NoWrap,
FlexWrap::Wrap => stretch::style::FlexWrap::Wrap,
FlexWrap::WrapReverse => stretch::style::FlexWrap::WrapReverse,
FlexWrap::NoWrap => taffy::style::FlexWrap::NoWrap,
FlexWrap::Wrap => taffy::style::FlexWrap::Wrap,
FlexWrap::WrapReverse => taffy::style::FlexWrap::WrapReverse,
}
}
}
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