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Remove Dimension::Undefined in favour of Option<Dimension> #148

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Remove Dimension::Undefined in favour of Option<Dimension> #148

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@Weibye Weibye commented Jun 11, 2022 •
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Objective

Fixes #114
Fixes #154

Enabled by the work from #144

Changelog

  • Dimension::Undefined has been removed
  • Which means we need to deal with undefined / defined nature of the dimensions in one level higher, using Option<Dimension>

Size

The geometry::Size<T> has been changed from

pub struct Size<T> {
    /// The x extent of the rectangle
    pub width: T,
    /// The y extent of the rectangle
    pub height: T,
}

to

pub struct Size<T> {
    /// The x extent of the rectangle
    pub width: Option<T>,
    /// The y extent of the rectangle
    pub height: Option<T>,
}

Rect

Has changed from

pub struct Rect<T> {
    pub start: T,
    pub end: T,
    pub top: T,
    pub bottom: T,
}

to

pub struct Rect<T> {
    pub start: Option<T>,
    pub end: Option<T>,
    pub top: Option<T>,
    pub bottom: Option<T>,
}

Feedback wanted

  • TODO

@alice-i-cecile alice-i-cecile added the code quality Make the code cleaner or prettier. label Jun 11, 2022
@Weibye Weibye mentioned this pull request Jun 11, 2022
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alice-i-cecile commented Jun 11, 2022

@Weibye I've done my best to resolve the merge conflicts and rebase for you :)

Weibye
Weibye commented Jun 12, 2022
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@Weibye Weibye added the breaking-change A change that breaks our public interface label Jun 12, 2022
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Weibye commented Jun 12, 2022
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Making progress, uncertain of a few things

src/flexbox.rs
node_inner_size: Size<Option<f32>>,
node_inner_size: Size<f32>,
/// The size of the surrounding container
container_size: Size<f32>,
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@Weibye Weibye Jun 12, 2022

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Looking at this, do we need a Size that does not have Optional fields? One that is guaranteed to have both width and height?

src/flexbox.rs
Comment on lines +212 to +217
let margin =
self.nodes[node].style.margin.map(|n| n.map(|d| d.resolve(parent_size.width)).unwrap_or(Some(0.0)));
let padding =
self.nodes[node].style.padding.map(|n| n.map(|d| d.resolve(parent_size.width)).unwrap_or(Some(0.0)));
let border =
self.nodes[node].style.border.map(|n| n.map(|d| d.resolve(parent_size.width)).unwrap_or(Some(0.0)));
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@Weibye Weibye Jun 12, 2022

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I'm very uncertain if this is the correct logic. Still have more work to do before everything compiles and tests can start to yell at me.

src/flexbox.rs Outdated
Comment on lines 227 to 228
width: Some(node_size.width.maybe_sub(padding_border.horizontal_axis_sum())),
height: Some(node_size.height.maybe_sub(padding_border.vertical_axis_sum())),
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@Weibye Weibye Jun 12, 2022

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Compiler complains here: How can I satisfy the trait constraints of MaybeMath so that these sums work?

Weibye
Weibye commented Jun 12, 2022
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src/geometry.rs Outdated
Comment on lines 65 to 67
T: MaybeMath<T, Option<T>> + Copy + Clone,
T: MaybeMath<Option<T>, Option<T>> + Copy + Clone,
T: MaybeMath<Option<T>, T> + Copy + Clone,
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I did this to get the sums to work MaybeMath but it didn't solve it.

src/geometry.rs
pub(crate) fn horizontal_axis_sum(&self) -> T {
self.start + self.end
pub(crate) fn horizontal_axis_sum(&self) -> Option<T> {
self.start.and_then(|start| start.maybe_add(self.end))
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With MaybeMath I should be able to just use self.start.maybe_add(self.end) here (?) but not sure exactly how to get that to work.

Traits this involved are new to me, so bear with me while I try to figure this out 🙃

@Weibye Weibye mentioned this pull request Jun 12, 2022
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@Weibye Weibye mentioned this pull request Jun 23, 2022
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Weibye commented Jun 23, 2022

Replaced by #188

@Weibye Weibye closed this Jun 23, 2022
@Weibye Weibye mentioned this pull request Nov 25, 2022
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Change width and height of Size to Option<T> instead of T Consider removing Dimension::Undefined

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