//! Utility functions for applying layout attributes to taffy layout /* - [ ] pub display: Display, ----> taffy doesnt support all display types - [x] pub position_type: PositionType, --> taffy doesnt support everything - [x] pub direction: Direction, - [x] pub flex_direction: FlexDirection, - [x] pub flex_wrap: FlexWrap, - [x] pub flex_grow: f32, - [x] pub flex_shrink: f32, - [x] pub flex_basis: Dimension, - [x] pub overflow: Overflow, ---> taffy doesnt have support for directional overflow - [x] pub align_items: AlignItems, - [x] pub align_self: AlignSelf, - [x] pub align_content: AlignContent, - [x] pub margin: Rect, - [x] pub padding: Rect, - [x] pub justify_content: JustifyContent, - [x] pub position: Rect, - [x] pub border: Rect, - [ ] pub size: Size, ----> seems to only be relevant for input? - [ ] pub min_size: Size, - [ ] pub max_size: Size, - [ ] pub aspect_ratio: Number, ----> parsing is done, but taffy doesnt support it */ use lightningcss::properties::border::LineStyle; use lightningcss::properties::{align, display, flex, position, size}; use lightningcss::{ properties::{align::GapValue, border::BorderSideWidth, Property, PropertyId}, stylesheet::ParserOptions, traits::Parse, values::{ length::{Length, LengthPercentageOrAuto, LengthValue}, percentage::DimensionPercentage, ratio::Ratio, }, }; use taffy::{ prelude::*, style::{FlexDirection, PositionType}, }; /// Default values for layout attributes #[derive(Default)] pub struct LayoutConfigeration { /// the default border widths to use pub border_widths: BorderWidths, } /// Default border widths pub struct BorderWidths { /// the default border width to use for thin borders pub thin: f32, /// the default border width to use for medium borders pub medium: f32, /// the default border width to use for thick borders pub thick: f32, } impl Default for BorderWidths { fn default() -> Self { Self { thin: 1.0, medium: 3.0, thick: 5.0, } } } /// applies the entire html namespace defined in dioxus-html pub fn apply_layout_attributes(name: &str, value: &str, style: &mut Style) { apply_layout_attributes_cfg(name, value, style, &LayoutConfigeration::default()) } /// applies the entire html namespace defined in dioxus-html with the specified configeration pub fn apply_layout_attributes_cfg( name: &str, value: &str, style: &mut Style, config: &LayoutConfigeration, ) { if let Ok(property) = Property::parse_string(PropertyId::from(name), value, ParserOptions::default()) { match property { Property::Display(display) => match display { display::Display::Keyword(display::DisplayKeyword::None) => { style.display = Display::None } display::Display::Pair(pair) => { if let display::DisplayInside::Flex(_) = pair.inside { style.display = Display::Flex } } _ => (), }, Property::Position(position) => { style.position_type = match position { position::Position::Relative => PositionType::Relative, position::Position::Absolute => PositionType::Absolute, _ => return, } } Property::Top(top) => style.position.top = convert_length_percentage_or_auto(top), Property::Bottom(bottom) => { style.position.bottom = convert_length_percentage_or_auto(bottom) } Property::Left(left) => style.position.left = convert_length_percentage_or_auto(left), Property::Right(right) => { style.position.right = convert_length_percentage_or_auto(right) } Property::Inset(inset) => { style.position.top = convert_length_percentage_or_auto(inset.top); style.position.bottom = convert_length_percentage_or_auto(inset.bottom); style.position.left = convert_length_percentage_or_auto(inset.left); style.position.right = convert_length_percentage_or_auto(inset.right); } Property::BorderTopWidth(width) => { style.border.top = convert_border_side_width(width, &config.border_widths); } Property::BorderBottomWidth(width) => { style.border.bottom = convert_border_side_width(width, &config.border_widths); } Property::BorderLeftWidth(width) => { style.border.left = convert_border_side_width(width, &config.border_widths); } Property::BorderRightWidth(width) => { style.border.right = convert_border_side_width(width, &config.border_widths); } Property::BorderWidth(width) => { style.border.top = convert_border_side_width(width.top, &config.border_widths); style.border.bottom = convert_border_side_width(width.bottom, &config.border_widths); style.border.left = convert_border_side_width(width.left, &config.border_widths); style.border.right = convert_border_side_width(width.right, &config.border_widths); } Property::Border(border) => { let width = convert_border_side_width(border.width, &config.border_widths); style.border.top = width; style.border.bottom = width; style.border.left = width; style.border.right = width; } Property::BorderTop(top) => { style.border.top = convert_border_side_width(top.width, &config.border_widths); } Property::BorderBottom(bottom) => { style.border.bottom = convert_border_side_width(bottom.width, &config.border_widths); } Property::BorderLeft(left) => { style.border.left = convert_border_side_width(left.width, &config.border_widths); } Property::BorderRight(right) => { style.border.right = convert_border_side_width(right.width, &config.border_widths); } Property::BorderTopStyle(line_style) => { if line_style != LineStyle::None { style.border.top = convert_border_side_width(BorderSideWidth::Medium, &config.border_widths); } } Property::BorderBottomStyle(line_style) => { if line_style != LineStyle::None { style.border.bottom = convert_border_side_width(BorderSideWidth::Medium, &config.border_widths); } } Property::BorderLeftStyle(line_style) => { if line_style != LineStyle::None { style.border.left = convert_border_side_width(BorderSideWidth::Medium, &config.border_widths); } } Property::BorderRightStyle(line_style) => { if line_style != LineStyle::None { style.border.right = convert_border_side_width(BorderSideWidth::Medium, &config.border_widths); } } Property::BorderStyle(styles) => { if styles.top != LineStyle::None { style.border.top = convert_border_side_width(BorderSideWidth::Medium, &config.border_widths); } if styles.bottom != LineStyle::None { style.border.bottom = convert_border_side_width(BorderSideWidth::Medium, &config.border_widths); } if styles.left != LineStyle::None { style.border.left = convert_border_side_width(BorderSideWidth::Medium, &config.border_widths); } if styles.right != LineStyle::None { style.border.right = convert_border_side_width(BorderSideWidth::Medium, &config.border_widths); } } Property::FlexDirection(flex_direction, _) => { use FlexDirection::*; style.flex_direction = match flex_direction { flex::FlexDirection::Row => Row, flex::FlexDirection::RowReverse => RowReverse, flex::FlexDirection::Column => Column, flex::FlexDirection::ColumnReverse => ColumnReverse, } } Property::FlexWrap(wrap, _) => { use FlexWrap::*; style.flex_wrap = match wrap { flex::FlexWrap::NoWrap => NoWrap, flex::FlexWrap::Wrap => Wrap, flex::FlexWrap::WrapReverse => WrapReverse, } } Property::FlexGrow(grow, _) => { style.flex_grow = grow; } Property::FlexShrink(shrink, _) => { style.flex_shrink = shrink; } Property::FlexBasis(basis, _) => { style.flex_basis = convert_length_percentage_or_auto(basis); } Property::Flex(flex, _) => { style.flex_grow = flex.grow; style.flex_shrink = flex.shrink; style.flex_basis = convert_length_percentage_or_auto(flex.basis); } Property::AlignContent(align, _) => { use AlignContent::*; style.align_content = match align { align::AlignContent::ContentDistribution(distribution) => match distribution { align::ContentDistribution::SpaceBetween => SpaceBetween, align::ContentDistribution::SpaceAround => SpaceAround, align::ContentDistribution::SpaceEvenly => SpaceEvenly, align::ContentDistribution::Stretch => Stretch, }, align::AlignContent::ContentPosition { value: position, .. } => match position { align::ContentPosition::Center => Center, align::ContentPosition::Start | align::ContentPosition::FlexStart => { FlexStart } align::ContentPosition::End | align::ContentPosition::FlexEnd => FlexEnd, }, _ => return, }; } Property::JustifyContent(justify, _) => { use JustifyContent::*; style.justify_content = match justify { align::JustifyContent::ContentDistribution(distribution) => { match distribution { align::ContentDistribution::SpaceBetween => SpaceBetween, align::ContentDistribution::SpaceAround => SpaceAround, align::ContentDistribution::SpaceEvenly => SpaceEvenly, _ => return, } } align::JustifyContent::ContentPosition { value: position, .. } => match position { align::ContentPosition::Center => Center, // start ignores -reverse flex-direction but there is no way to specify that in Taffy align::ContentPosition::Start | align::ContentPosition::FlexStart => { FlexStart } // end ignores -reverse flex-direction but there is no way to specify that in Taffy align::ContentPosition::End | align::ContentPosition::FlexEnd => FlexEnd, }, _ => return, }; } Property::AlignSelf(align, _) => { use AlignSelf::*; style.align_self = match align { align::AlignSelf::Auto => Auto, align::AlignSelf::Stretch => Stretch, align::AlignSelf::BaselinePosition(_) => Baseline, align::AlignSelf::SelfPosition { value: position, .. } => match position { align::SelfPosition::Center => Center, align::SelfPosition::Start | align::SelfPosition::SelfStart | align::SelfPosition::FlexStart => FlexStart, align::SelfPosition::End | align::SelfPosition::SelfEnd | align::SelfPosition::FlexEnd => FlexEnd, }, _ => return, }; } Property::AlignItems(align, _) => { use AlignItems::*; style.align_items = match align { align::AlignItems::BaselinePosition(_) => Baseline, align::AlignItems::Stretch => Stretch, align::AlignItems::SelfPosition { value: position, .. } => match position { align::SelfPosition::Center => Center, align::SelfPosition::FlexStart => FlexStart, align::SelfPosition::FlexEnd => FlexEnd, _ => return, }, _ => return, }; } Property::RowGap(row_gap) => { style.gap.width = convert_gap_value(row_gap); } Property::ColumnGap(column_gap) => { style.gap.height = convert_gap_value(column_gap); } Property::Gap(gap) => { style.gap = Size { width: convert_gap_value(gap.row), height: convert_gap_value(gap.column), }; } Property::MarginTop(margin) => { style.margin.top = convert_length_percentage_or_auto(margin); } Property::MarginBottom(margin) => { style.margin.bottom = convert_length_percentage_or_auto(margin); } Property::MarginLeft(margin) => { style.margin.left = convert_length_percentage_or_auto(margin); } Property::MarginRight(margin) => { style.margin.right = convert_length_percentage_or_auto(margin); } Property::Margin(margin) => { style.margin = Rect { top: convert_length_percentage_or_auto(margin.top), bottom: convert_length_percentage_or_auto(margin.bottom), left: convert_length_percentage_or_auto(margin.left), right: convert_length_percentage_or_auto(margin.right), }; } Property::PaddingTop(padding) => { style.padding.top = convert_length_percentage_or_auto(padding); } Property::PaddingBottom(padding) => { style.padding.bottom = convert_length_percentage_or_auto(padding); } Property::PaddingLeft(padding) => { style.padding.left = convert_length_percentage_or_auto(padding); } Property::PaddingRight(padding) => { style.padding.right = convert_length_percentage_or_auto(padding); } Property::Padding(padding) => { style.padding = Rect { top: convert_length_percentage_or_auto(padding.top), bottom: convert_length_percentage_or_auto(padding.bottom), left: convert_length_percentage_or_auto(padding.left), right: convert_length_percentage_or_auto(padding.right), }; } Property::Width(width) => { style.size.width = convert_size(width); } Property::Height(height) => { style.size.height = convert_size(height); } _ => (), } // currently not implemented in lightningcss if name == "aspect-ratio" { if let Ok(ratio) = Ratio::parse_string(value) { style.aspect_ratio = Some(ratio.0 / ratio.1); } } } } fn convert_length_value(length_value: LengthValue) -> Dimension { match length_value { LengthValue::Px(value) => Dimension::Points(value), _ => todo!(), } } fn convert_dimension_percentage( dimension_percentage: DimensionPercentage, ) -> Dimension { match dimension_percentage { DimensionPercentage::Dimension(value) => convert_length_value(value), DimensionPercentage::Percentage(percentage) => Dimension::Percent(percentage.0), _ => todo!(), } } fn convert_length_percentage_or_auto( length_percentage_or_auto: LengthPercentageOrAuto, ) -> Dimension { match length_percentage_or_auto { LengthPercentageOrAuto::Auto => Dimension::Auto, LengthPercentageOrAuto::LengthPercentage(percentage) => { convert_dimension_percentage(percentage) } } } fn convert_border_side_width( border_side_width: BorderSideWidth, border_width_config: &BorderWidths, ) -> Dimension { match border_side_width { BorderSideWidth::Length(Length::Value(value)) => convert_length_value(value), BorderSideWidth::Thick => Dimension::Points(border_width_config.thick), BorderSideWidth::Medium => Dimension::Points(border_width_config.medium), BorderSideWidth::Thin => Dimension::Points(border_width_config.thin), _ => todo!(), } } fn convert_gap_value(gap_value: GapValue) -> Dimension { match gap_value { GapValue::LengthPercentage(dim) => convert_dimension_percentage(dim), GapValue::Normal => Dimension::Auto, } } fn convert_size(size: size::Size) -> Dimension { match size { size::Size::Auto => Dimension::Auto, size::Size::LengthPercentage(length) => convert_dimension_percentage(length), _ => todo!(), } } /// parse relative or absolute value pub fn parse_value(value: &str) -> Option { if value.ends_with("px") { if let Ok(px) = value.trim_end_matches("px").parse::() { Some(Dimension::Points(px)) } else { None } } else if value.ends_with('%') { if let Ok(pct) = value.trim_end_matches('%').parse::() { Some(Dimension::Percent(pct / 100.0)) } else { None } } else { None } }