1use crate::{
2 rems, AbsoluteLength, Bounds, Corners, CornersRefinement, DefiniteLength, Edges,
3 EdgesRefinement, Font, FontFeatures, FontStyle, FontWeight, Hsla, Length, Pixels, Point,
4 PointRefinement, Rems, Result, RunStyle, SharedString, Size, SizeRefinement, ViewContext,
5 WindowContext,
6};
7use refineable::Refineable;
8pub use taffy::style::{
9 AlignContent, AlignItems, AlignSelf, Display, FlexDirection, FlexWrap, JustifyContent,
10 Overflow, Position,
11};
12
13#[derive(Clone, Refineable, Debug)]
14#[refineable(debug)]
15pub struct Style {
16 /// What layout strategy should be used?
17 pub display: Display,
18
19 // Overflow properties
20 /// How children overflowing their container should affect layout
21 #[refineable]
22 pub overflow: Point<Overflow>,
23 /// How much space (in points) should be reserved for the scrollbars of `Overflow::Scroll` and `Overflow::Auto` nodes.
24 pub scrollbar_width: f32,
25
26 // Position properties
27 /// What should the `position` value of this struct use as a base offset?
28 pub position: Position,
29 /// How should the position of this element be tweaked relative to the layout defined?
30 #[refineable]
31 pub inset: Edges<Length>,
32
33 // Size properies
34 /// Sets the initial size of the item
35 #[refineable]
36 pub size: Size<Length>,
37 /// Controls the minimum size of the item
38 #[refineable]
39 pub min_size: Size<Length>,
40 /// Controls the maximum size of the item
41 #[refineable]
42 pub max_size: Size<Length>,
43 /// Sets the preferred aspect ratio for the item. The ratio is calculated as width divided by height.
44 pub aspect_ratio: Option<f32>,
45
46 // Spacing Properties
47 /// How large should the margin be on each side?
48 #[refineable]
49 pub margin: Edges<Length>,
50 /// How large should the padding be on each side?
51 #[refineable]
52 pub padding: Edges<DefiniteLength>,
53 /// How large should the border be on each side?
54 #[refineable]
55 pub border_widths: Edges<AbsoluteLength>,
56
57 // Alignment properties
58 /// How this node's children aligned in the cross/block axis?
59 pub align_items: Option<AlignItems>,
60 /// How this node should be aligned in the cross/block axis. Falls back to the parents [`AlignItems`] if not set
61 pub align_self: Option<AlignSelf>,
62 /// How should content contained within this item be aligned in the cross/block axis
63 pub align_content: Option<AlignContent>,
64 /// How should contained within this item be aligned in the main/inline axis
65 pub justify_content: Option<JustifyContent>,
66 /// How large should the gaps between items in a flex container be?
67 #[refineable]
68 pub gap: Size<DefiniteLength>,
69
70 // Flexbox properies
71 /// Which direction does the main axis flow in?
72 pub flex_direction: FlexDirection,
73 /// Should elements wrap, or stay in a single line?
74 pub flex_wrap: FlexWrap,
75 /// Sets the initial main axis size of the item
76 pub flex_basis: Length,
77 /// The relative rate at which this item grows when it is expanding to fill space, 0.0 is the default value, and this value must be positive.
78 pub flex_grow: f32,
79 /// The relative rate at which this item shrinks when it is contracting to fit into space, 1.0 is the default value, and this value must be positive.
80 pub flex_shrink: f32,
81
82 /// The fill color of this element
83 pub fill: Option<Fill>,
84
85 /// The border color of this element
86 pub border_color: Option<Hsla>,
87
88 /// The radius of the corners of this element
89 #[refineable]
90 pub corner_radii: Corners<AbsoluteLength>,
91
92 /// TEXT
93 pub text: TextStyleRefinement,
94}
95
96#[derive(Refineable, Clone, Debug)]
97#[refineable(debug)]
98pub struct TextStyle {
99 pub color: Hsla,
100 pub font_family: SharedString,
101 pub font_features: FontFeatures,
102 pub font_size: Rems,
103 pub font_weight: FontWeight,
104 pub font_style: FontStyle,
105 pub underline: Option<UnderlineStyle>,
106}
107
108impl Default for TextStyle {
109 fn default() -> Self {
110 TextStyle {
111 color: Hsla::default(),
112 font_family: SharedString::default(),
113 font_features: FontFeatures::default(),
114 font_size: rems(1.),
115 font_weight: FontWeight::default(),
116 font_style: FontStyle::default(),
117 underline: None,
118 }
119 }
120}
121
122impl TextStyle {
123 pub fn highlight(mut self, style: HighlightStyle) -> Result<Self> {
124 if let Some(weight) = style.font_weight {
125 self.font_weight = weight;
126 }
127 if let Some(style) = style.font_style {
128 self.font_style = style;
129 }
130
131 if let Some(color) = style.color {
132 self.color = self.color.blend(color);
133 }
134
135 if let Some(factor) = style.fade_out {
136 self.color.fade_out(factor);
137 }
138
139 if let Some(underline) = style.underline {
140 self.underline = Some(underline);
141 }
142
143 Ok(self)
144 }
145
146 pub fn to_run(&self) -> RunStyle {
147 RunStyle {
148 font: Font {
149 family: self.font_family.clone(),
150 features: Default::default(),
151 weight: self.font_weight,
152 style: self.font_style,
153 },
154 color: self.color,
155 underline: self.underline.clone(),
156 }
157 }
158}
159
160#[derive(Clone, Debug, Default, PartialEq)]
161pub struct HighlightStyle {
162 pub color: Option<Hsla>,
163 pub font_weight: Option<FontWeight>,
164 pub font_style: Option<FontStyle>,
165 pub underline: Option<UnderlineStyle>,
166 pub fade_out: Option<f32>,
167}
168
169impl Eq for HighlightStyle {}
170
171impl Style {
172 pub fn text_style(&self, _cx: &WindowContext) -> Option<&TextStyleRefinement> {
173 if self.text.is_some() {
174 Some(&self.text)
175 } else {
176 None
177 }
178 }
179
180 /// Paints the background of an element styled with this style.
181 pub fn paint_background<V: 'static>(&self, _bounds: Bounds<Pixels>, cx: &mut ViewContext<V>) {
182 let _rem_size = cx.rem_size();
183 if let Some(_color) = self.fill.as_ref().and_then(Fill::color) {
184 todo!();
185 }
186 }
187
188 /// Paints the foreground of an element styled with this style.
189 pub fn paint_foreground<V: 'static>(&self, _bounds: Bounds<Pixels>, cx: &mut ViewContext<V>) {
190 let rem_size = cx.rem_size();
191
192 if let Some(_color) = self.border_color {
193 let border = self.border_widths.to_pixels(rem_size);
194 if !border.is_empty() {
195 todo!();
196 }
197 }
198 }
199}
200
201impl Default for Style {
202 fn default() -> Self {
203 Style {
204 display: Display::Block,
205 overflow: Point {
206 x: Overflow::Visible,
207 y: Overflow::Visible,
208 },
209 scrollbar_width: 0.0,
210 position: Position::Relative,
211 inset: Edges::auto(),
212 margin: Edges::<Length>::zero(),
213 padding: Edges::<DefiniteLength>::zero(),
214 border_widths: Edges::<AbsoluteLength>::zero(),
215 size: Size::auto(),
216 min_size: Size::auto(),
217 max_size: Size::auto(),
218 aspect_ratio: None,
219 gap: Size::zero(),
220 // Aligment
221 align_items: None,
222 align_self: None,
223 align_content: None,
224 justify_content: None,
225 // Flexbox
226 flex_direction: FlexDirection::Row,
227 flex_wrap: FlexWrap::NoWrap,
228 flex_grow: 0.0,
229 flex_shrink: 1.0,
230 flex_basis: Length::Auto,
231 fill: None,
232 border_color: None,
233 corner_radii: Corners::default(),
234 text: TextStyleRefinement::default(),
235 }
236 }
237}
238
239#[derive(Refineable, Clone, Default, Debug, PartialEq, Eq)]
240#[refineable(debug)]
241pub struct UnderlineStyle {
242 pub thickness: Pixels,
243 pub color: Option<Hsla>,
244 pub squiggly: bool,
245}
246
247#[derive(Clone, Debug)]
248pub enum Fill {
249 Color(Hsla),
250}
251
252impl Fill {
253 pub fn color(&self) -> Option<Hsla> {
254 match self {
255 Fill::Color(color) => Some(*color),
256 }
257 }
258}
259
260impl Default for Fill {
261 fn default() -> Self {
262 Self::Color(Hsla::default())
263 }
264}
265
266impl From<Hsla> for Fill {
267 fn from(color: Hsla) -> Self {
268 Self::Color(color)
269 }
270}
271
272#[derive(Clone, Refineable, Default, Debug)]
273#[refineable(debug)]
274pub struct CornerRadii {
275 pub top_left: AbsoluteLength,
276 pub top_right: AbsoluteLength,
277 pub bottom_left: AbsoluteLength,
278 pub bottom_right: AbsoluteLength,
279}
280
281impl From<TextStyle> for HighlightStyle {
282 fn from(other: TextStyle) -> Self {
283 Self::from(&other)
284 }
285}
286
287impl From<&TextStyle> for HighlightStyle {
288 fn from(other: &TextStyle) -> Self {
289 Self {
290 color: Some(other.color),
291 font_weight: Some(other.font_weight),
292 font_style: Some(other.font_style),
293 underline: other.underline.clone(),
294 fade_out: None,
295 }
296 }
297}
298
299impl HighlightStyle {
300 pub fn highlight(&mut self, other: HighlightStyle) {
301 match (self.color, other.color) {
302 (Some(self_color), Some(other_color)) => {
303 self.color = Some(Hsla::blend(other_color, self_color));
304 }
305 (None, Some(other_color)) => {
306 self.color = Some(other_color);
307 }
308 _ => {}
309 }
310
311 if other.font_weight.is_some() {
312 self.font_weight = other.font_weight;
313 }
314
315 if other.font_style.is_some() {
316 self.font_style = other.font_style;
317 }
318
319 if other.underline.is_some() {
320 self.underline = other.underline;
321 }
322
323 match (other.fade_out, self.fade_out) {
324 (Some(source_fade), None) => self.fade_out = Some(source_fade),
325 (Some(source_fade), Some(dest_fade)) => {
326 self.fade_out = Some((dest_fade * (1. + source_fade)).clamp(0., 1.));
327 }
328 _ => {}
329 }
330 }
331}
332
333impl From<Hsla> for HighlightStyle {
334 fn from(color: Hsla) -> Self {
335 Self {
336 color: Some(color),
337 ..Default::default()
338 }
339 }
340}