1use std::{
2 hash::{Hash, Hasher},
3 iter, mem,
4 ops::Range,
5};
6
7use crate::{
8 AbsoluteLength, App, Background, BackgroundTag, BorderStyle, Bounds, ContentMask, Corners,
9 CornersRefinement, CursorStyle, DefiniteLength, DevicePixels, Edges, EdgesRefinement, Font,
10 FontFallbacks, FontFeatures, FontStyle, FontWeight, GridLocation, Hsla, Length, Pixels, Point,
11 PointRefinement, Rgba, SharedString, Size, SizeRefinement, Styled, TextRun, Window, black, phi,
12 point, quad, rems, size,
13};
14use collections::HashSet;
15use refineable::Refineable;
16use schemars::JsonSchema;
17use serde::{Deserialize, Serialize};
18
19/// Use this struct for interfacing with the 'debug_below' styling from your own elements.
20/// If a parent element has this style set on it, then this struct will be set as a global in
21/// GPUI.
22#[cfg(debug_assertions)]
23pub struct DebugBelow;
24
25#[cfg(debug_assertions)]
26impl crate::Global for DebugBelow {}
27
28/// How to fit the image into the bounds of the element.
29pub enum ObjectFit {
30 /// The image will be stretched to fill the bounds of the element.
31 Fill,
32 /// The image will be scaled to fit within the bounds of the element.
33 Contain,
34 /// The image will be scaled to cover the bounds of the element.
35 Cover,
36 /// The image will be scaled down to fit within the bounds of the element.
37 ScaleDown,
38 /// The image will maintain its original size.
39 None,
40}
41
42impl ObjectFit {
43 /// Get the bounds of the image within the given bounds.
44 pub fn get_bounds(
45 &self,
46 bounds: Bounds<Pixels>,
47 image_size: Size<DevicePixels>,
48 ) -> Bounds<Pixels> {
49 let image_size = image_size.map(|dimension| Pixels::from(u32::from(dimension)));
50 let image_ratio = image_size.width / image_size.height;
51 let bounds_ratio = bounds.size.width / bounds.size.height;
52
53 match self {
54 ObjectFit::Fill => bounds,
55 ObjectFit::Contain => {
56 let new_size = if bounds_ratio > image_ratio {
57 size(
58 image_size.width * (bounds.size.height / image_size.height),
59 bounds.size.height,
60 )
61 } else {
62 size(
63 bounds.size.width,
64 image_size.height * (bounds.size.width / image_size.width),
65 )
66 };
67
68 Bounds {
69 origin: point(
70 bounds.origin.x + (bounds.size.width - new_size.width) / 2.0,
71 bounds.origin.y + (bounds.size.height - new_size.height) / 2.0,
72 ),
73 size: new_size,
74 }
75 }
76 ObjectFit::ScaleDown => {
77 // Check if the image is larger than the bounds in either dimension.
78 if image_size.width > bounds.size.width || image_size.height > bounds.size.height {
79 // If the image is larger, use the same logic as Contain to scale it down.
80 let new_size = if bounds_ratio > image_ratio {
81 size(
82 image_size.width * (bounds.size.height / image_size.height),
83 bounds.size.height,
84 )
85 } else {
86 size(
87 bounds.size.width,
88 image_size.height * (bounds.size.width / image_size.width),
89 )
90 };
91
92 Bounds {
93 origin: point(
94 bounds.origin.x + (bounds.size.width - new_size.width) / 2.0,
95 bounds.origin.y + (bounds.size.height - new_size.height) / 2.0,
96 ),
97 size: new_size,
98 }
99 } else {
100 // If the image is smaller than or equal to the container, display it at its original size,
101 // centered within the container.
102 let original_size = size(image_size.width, image_size.height);
103 Bounds {
104 origin: point(
105 bounds.origin.x + (bounds.size.width - original_size.width) / 2.0,
106 bounds.origin.y + (bounds.size.height - original_size.height) / 2.0,
107 ),
108 size: original_size,
109 }
110 }
111 }
112 ObjectFit::Cover => {
113 let new_size = if bounds_ratio > image_ratio {
114 size(
115 bounds.size.width,
116 image_size.height * (bounds.size.width / image_size.width),
117 )
118 } else {
119 size(
120 image_size.width * (bounds.size.height / image_size.height),
121 bounds.size.height,
122 )
123 };
124
125 Bounds {
126 origin: point(
127 bounds.origin.x + (bounds.size.width - new_size.width) / 2.0,
128 bounds.origin.y + (bounds.size.height - new_size.height) / 2.0,
129 ),
130 size: new_size,
131 }
132 }
133 ObjectFit::None => Bounds {
134 origin: bounds.origin,
135 size: image_size,
136 },
137 }
138 }
139}
140
141/// The CSS styling that can be applied to an element via the `Styled` trait
142#[derive(Clone, Refineable, Debug)]
143#[refineable(Debug, PartialEq, Serialize, Deserialize, JsonSchema)]
144pub struct Style {
145 /// What layout strategy should be used?
146 pub display: Display,
147
148 /// Should the element be painted on screen?
149 pub visibility: Visibility,
150
151 // Overflow properties
152 /// How children overflowing their container should affect layout
153 #[refineable]
154 pub overflow: Point<Overflow>,
155 /// How much space (in points) should be reserved for the scrollbars of `Overflow::Scroll` and `Overflow::Auto` nodes.
156 pub scrollbar_width: AbsoluteLength,
157 /// Whether both x and y axis should be scrollable at the same time.
158 pub allow_concurrent_scroll: bool,
159 /// Whether scrolling should be restricted to the axis indicated by the mouse wheel.
160 ///
161 /// This means that:
162 /// - The mouse wheel alone will only ever scroll the Y axis.
163 /// - Holding `Shift` and using the mouse wheel will scroll the X axis.
164 ///
165 /// ## Motivation
166 ///
167 /// On the web when scrolling with the mouse wheel, scrolling up and down will always scroll the Y axis, even when
168 /// the mouse is over a horizontally-scrollable element.
169 ///
170 /// The only way to scroll horizontally is to hold down `Shift` while scrolling, which then changes the scroll axis
171 /// to the X axis.
172 ///
173 /// Currently, GPUI operates differently from the web in that it will scroll an element in either the X or Y axis
174 /// when scrolling with just the mouse wheel. This causes problems when scrolling in a vertical list that contains
175 /// horizontally-scrollable elements, as when you get to the horizontally-scrollable elements the scroll will be
176 /// hijacked.
177 ///
178 /// Ideally we would match the web's behavior and not have a need for this, but right now we're adding this opt-in
179 /// style property to limit the potential blast radius.
180 pub restrict_scroll_to_axis: bool,
181
182 // Position properties
183 /// What should the `position` value of this struct use as a base offset?
184 pub position: Position,
185 /// How should the position of this element be tweaked relative to the layout defined?
186 #[refineable]
187 pub inset: Edges<Length>,
188
189 // Size properties
190 /// Sets the initial size of the item
191 #[refineable]
192 pub size: Size<Length>,
193 /// Controls the minimum size of the item
194 #[refineable]
195 pub min_size: Size<Length>,
196 /// Controls the maximum size of the item
197 #[refineable]
198 pub max_size: Size<Length>,
199 /// Sets the preferred aspect ratio for the item. The ratio is calculated as width divided by height.
200 pub aspect_ratio: Option<f32>,
201
202 // Spacing Properties
203 /// How large should the margin be on each side?
204 #[refineable]
205 pub margin: Edges<Length>,
206 /// How large should the padding be on each side?
207 #[refineable]
208 pub padding: Edges<DefiniteLength>,
209 /// How large should the border be on each side?
210 #[refineable]
211 pub border_widths: Edges<AbsoluteLength>,
212
213 // Alignment properties
214 /// How this node's children aligned in the cross/block axis?
215 pub align_items: Option<AlignItems>,
216 /// How this node should be aligned in the cross/block axis. Falls back to the parents [`AlignItems`] if not set
217 pub align_self: Option<AlignSelf>,
218 /// How should content contained within this item be aligned in the cross/block axis
219 pub align_content: Option<AlignContent>,
220 /// How should contained within this item be aligned in the main/inline axis
221 pub justify_content: Option<JustifyContent>,
222 /// How large should the gaps between items in a flex container be?
223 #[refineable]
224 pub gap: Size<DefiniteLength>,
225
226 // Flexbox properties
227 /// Which direction does the main axis flow in?
228 pub flex_direction: FlexDirection,
229 /// Should elements wrap, or stay in a single line?
230 pub flex_wrap: FlexWrap,
231 /// Sets the initial main axis size of the item
232 pub flex_basis: Length,
233 /// 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.
234 pub flex_grow: f32,
235 /// 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.
236 pub flex_shrink: f32,
237
238 /// The fill color of this element
239 pub background: Option<Fill>,
240
241 /// The border color of this element
242 pub border_color: Option<Hsla>,
243
244 /// The border style of this element
245 pub border_style: BorderStyle,
246
247 /// The radius of the corners of this element
248 #[refineable]
249 pub corner_radii: Corners<AbsoluteLength>,
250
251 /// Box shadow of the element
252 pub box_shadow: Vec<BoxShadow>,
253
254 /// The text style of this element
255 pub text: TextStyleRefinement,
256
257 /// The mouse cursor style shown when the mouse pointer is over an element.
258 pub mouse_cursor: Option<CursorStyle>,
259
260 /// The opacity of this element
261 pub opacity: Option<f32>,
262
263 /// The grid columns of this element
264 /// Equivalent to the Tailwind `grid-cols-<number>`
265 pub grid_cols: Option<u16>,
266
267 /// The row span of this element
268 /// Equivalent to the Tailwind `grid-rows-<number>`
269 pub grid_rows: Option<u16>,
270
271 /// The grid location of this element
272 pub grid_location: Option<GridLocation>,
273
274 /// Whether to draw a red debugging outline around this element
275 #[cfg(debug_assertions)]
276 pub debug: bool,
277
278 /// Whether to draw a red debugging outline around this element and all of its conforming children
279 #[cfg(debug_assertions)]
280 pub debug_below: bool,
281}
282
283impl Styled for StyleRefinement {
284 fn style(&mut self) -> &mut StyleRefinement {
285 self
286 }
287}
288
289impl StyleRefinement {
290 /// The grid location of this element
291 pub fn grid_location_mut(&mut self) -> &mut GridLocation {
292 self.grid_location.get_or_insert_default()
293 }
294}
295
296/// The value of the visibility property, similar to the CSS property `visibility`
297#[derive(Default, Clone, Copy, Debug, Eq, PartialEq, Serialize, Deserialize, JsonSchema)]
298pub enum Visibility {
299 /// The element should be drawn as normal.
300 #[default]
301 Visible,
302 /// The element should not be drawn, but should still take up space in the layout.
303 Hidden,
304}
305
306/// The possible values of the box-shadow property
307#[derive(Clone, Debug, PartialEq, Serialize, Deserialize, JsonSchema)]
308pub struct BoxShadow {
309 /// What color should the shadow have?
310 pub color: Hsla,
311 /// How should it be offset from its element?
312 pub offset: Point<Pixels>,
313 /// How much should the shadow be blurred?
314 pub blur_radius: Pixels,
315 /// How much should the shadow spread?
316 pub spread_radius: Pixels,
317}
318
319/// How to handle whitespace in text
320#[derive(Copy, Clone, Debug, Default, PartialEq, Eq, Serialize, Deserialize, JsonSchema)]
321pub enum WhiteSpace {
322 /// Normal line wrapping when text overflows the width of the element
323 #[default]
324 Normal,
325 /// No line wrapping, text will overflow the width of the element
326 Nowrap,
327}
328
329/// How to truncate text that overflows the width of the element
330#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize, JsonSchema)]
331pub enum TextOverflow {
332 /// Truncate the text when it doesn't fit, and represent this truncation by displaying the
333 /// provided string.
334 Truncate(SharedString),
335}
336
337/// How to align text within the element
338#[derive(Copy, Clone, Debug, Default, PartialEq, Eq, Serialize, Deserialize, JsonSchema)]
339pub enum TextAlign {
340 /// Align the text to the left of the element
341 #[default]
342 Left,
343
344 /// Center the text within the element
345 Center,
346
347 /// Align the text to the right of the element
348 Right,
349}
350
351/// The properties that can be used to style text in GPUI
352#[derive(Refineable, Clone, Debug, PartialEq)]
353#[refineable(Debug, PartialEq, Serialize, Deserialize, JsonSchema)]
354pub struct TextStyle {
355 /// The color of the text
356 pub color: Hsla,
357
358 /// The font family to use
359 pub font_family: SharedString,
360
361 /// The font features to use
362 pub font_features: FontFeatures,
363
364 /// The fallback fonts to use
365 pub font_fallbacks: Option<FontFallbacks>,
366
367 /// The font size to use, in pixels or rems.
368 pub font_size: AbsoluteLength,
369
370 /// The line height to use, in pixels or fractions
371 pub line_height: DefiniteLength,
372
373 /// The font weight, e.g. bold
374 pub font_weight: FontWeight,
375
376 /// The font style, e.g. italic
377 pub font_style: FontStyle,
378
379 /// The background color of the text
380 pub background_color: Option<Hsla>,
381
382 /// The underline style of the text
383 pub underline: Option<UnderlineStyle>,
384
385 /// The strikethrough style of the text
386 pub strikethrough: Option<StrikethroughStyle>,
387
388 /// How to handle whitespace in the text
389 pub white_space: WhiteSpace,
390
391 /// The text should be truncated if it overflows the width of the element
392 pub text_overflow: Option<TextOverflow>,
393
394 /// How the text should be aligned within the element
395 pub text_align: TextAlign,
396
397 /// The number of lines to display before truncating the text
398 pub line_clamp: Option<usize>,
399}
400
401impl Default for TextStyle {
402 fn default() -> Self {
403 TextStyle {
404 color: black(),
405 // todo(linux) make this configurable or choose better default
406 font_family: if cfg!(any(target_os = "linux", target_os = "freebsd")) {
407 "FreeMono".into()
408 } else if cfg!(target_os = "windows") {
409 "Segoe UI".into()
410 } else {
411 "Helvetica".into()
412 },
413 font_features: FontFeatures::default(),
414 font_fallbacks: None,
415 font_size: rems(1.).into(),
416 line_height: phi(),
417 font_weight: FontWeight::default(),
418 font_style: FontStyle::default(),
419 background_color: None,
420 underline: None,
421 strikethrough: None,
422 white_space: WhiteSpace::Normal,
423 text_overflow: None,
424 text_align: TextAlign::default(),
425 line_clamp: None,
426 }
427 }
428}
429
430impl TextStyle {
431 /// Create a new text style with the given highlighting applied.
432 pub fn highlight(mut self, style: impl Into<HighlightStyle>) -> Self {
433 let style = style.into();
434 if let Some(weight) = style.font_weight {
435 self.font_weight = weight;
436 }
437 if let Some(style) = style.font_style {
438 self.font_style = style;
439 }
440
441 if let Some(color) = style.color {
442 self.color = self.color.blend(color);
443 }
444
445 if let Some(factor) = style.fade_out {
446 self.color.fade_out(factor);
447 }
448
449 if let Some(background_color) = style.background_color {
450 self.background_color = Some(background_color);
451 }
452
453 if let Some(underline) = style.underline {
454 self.underline = Some(underline);
455 }
456
457 if let Some(strikethrough) = style.strikethrough {
458 self.strikethrough = Some(strikethrough);
459 }
460
461 self
462 }
463
464 /// Get the font configured for this text style.
465 pub fn font(&self) -> Font {
466 Font {
467 family: self.font_family.clone(),
468 features: self.font_features.clone(),
469 fallbacks: self.font_fallbacks.clone(),
470 weight: self.font_weight,
471 style: self.font_style,
472 }
473 }
474
475 /// Returns the rounded line height in pixels.
476 pub fn line_height_in_pixels(&self, rem_size: Pixels) -> Pixels {
477 self.line_height.to_pixels(self.font_size, rem_size).round()
478 }
479
480 /// Convert this text style into a [`TextRun`], for the given length of the text.
481 pub fn to_run(&self, len: usize) -> TextRun {
482 TextRun {
483 len,
484 font: Font {
485 family: self.font_family.clone(),
486 features: self.font_features.clone(),
487 fallbacks: self.font_fallbacks.clone(),
488 weight: self.font_weight,
489 style: self.font_style,
490 },
491 color: self.color,
492 background_color: self.background_color,
493 underline: self.underline,
494 strikethrough: self.strikethrough,
495 }
496 }
497}
498
499/// A highlight style to apply, similar to a `TextStyle` except
500/// for a single font, uniformly sized and spaced text.
501#[derive(Copy, Clone, Debug, Default, PartialEq)]
502pub struct HighlightStyle {
503 /// The color of the text
504 pub color: Option<Hsla>,
505
506 /// The font weight, e.g. bold
507 pub font_weight: Option<FontWeight>,
508
509 /// The font style, e.g. italic
510 pub font_style: Option<FontStyle>,
511
512 /// The background color of the text
513 pub background_color: Option<Hsla>,
514
515 /// The underline style of the text
516 pub underline: Option<UnderlineStyle>,
517
518 /// The underline style of the text
519 pub strikethrough: Option<StrikethroughStyle>,
520
521 /// Similar to the CSS `opacity` property, this will cause the text to be less vibrant.
522 pub fade_out: Option<f32>,
523}
524
525impl Eq for HighlightStyle {}
526
527impl Hash for HighlightStyle {
528 fn hash<H: Hasher>(&self, state: &mut H) {
529 self.color.hash(state);
530 self.font_weight.hash(state);
531 self.font_style.hash(state);
532 self.background_color.hash(state);
533 self.underline.hash(state);
534 self.strikethrough.hash(state);
535 state.write_u32(u32::from_be_bytes(
536 self.fade_out.map(|f| f.to_be_bytes()).unwrap_or_default(),
537 ));
538 }
539}
540
541impl Style {
542 /// Returns true if the style is visible and the background is opaque.
543 pub fn has_opaque_background(&self) -> bool {
544 self.background
545 .as_ref()
546 .is_some_and(|fill| fill.color().is_some_and(|color| !color.is_transparent()))
547 }
548
549 /// Get the text style in this element style.
550 pub fn text_style(&self) -> Option<&TextStyleRefinement> {
551 if self.text.is_some() {
552 Some(&self.text)
553 } else {
554 None
555 }
556 }
557
558 /// Get the content mask for this element style, based on the given bounds.
559 /// If the element does not hide its overflow, this will return `None`.
560 pub fn overflow_mask(
561 &self,
562 bounds: Bounds<Pixels>,
563 rem_size: Pixels,
564 ) -> Option<ContentMask<Pixels>> {
565 match self.overflow {
566 Point {
567 x: Overflow::Visible,
568 y: Overflow::Visible,
569 } => None,
570 _ => {
571 let mut min = bounds.origin;
572 let mut max = bounds.bottom_right();
573
574 if self
575 .border_color
576 .is_some_and(|color| !color.is_transparent())
577 {
578 min.x += self.border_widths.left.to_pixels(rem_size);
579 max.x -= self.border_widths.right.to_pixels(rem_size);
580 min.y += self.border_widths.top.to_pixels(rem_size);
581 max.y -= self.border_widths.bottom.to_pixels(rem_size);
582 }
583
584 let bounds = match (
585 self.overflow.x == Overflow::Visible,
586 self.overflow.y == Overflow::Visible,
587 ) {
588 // x and y both visible
589 (true, true) => return None,
590 // x visible, y hidden
591 (true, false) => Bounds::from_corners(
592 point(min.x, bounds.origin.y),
593 point(max.x, bounds.bottom_right().y),
594 ),
595 // x hidden, y visible
596 (false, true) => Bounds::from_corners(
597 point(bounds.origin.x, min.y),
598 point(bounds.bottom_right().x, max.y),
599 ),
600 // both hidden
601 (false, false) => Bounds::from_corners(min, max),
602 };
603
604 Some(ContentMask { bounds })
605 }
606 }
607 }
608
609 /// Paints the background of an element styled with this style.
610 pub fn paint(
611 &self,
612 bounds: Bounds<Pixels>,
613 window: &mut Window,
614 cx: &mut App,
615 continuation: impl FnOnce(&mut Window, &mut App),
616 ) {
617 #[cfg(debug_assertions)]
618 if self.debug_below {
619 cx.set_global(DebugBelow)
620 }
621
622 #[cfg(debug_assertions)]
623 if self.debug || cx.has_global::<DebugBelow>() {
624 window.paint_quad(crate::outline(bounds, crate::red(), BorderStyle::default()));
625 }
626
627 let rem_size = window.rem_size();
628 let corner_radii = self
629 .corner_radii
630 .to_pixels(rem_size)
631 .clamp_radii_for_quad_size(bounds.size);
632
633 window.paint_shadows(bounds, corner_radii, &self.box_shadow);
634
635 let background_color = self.background.as_ref().and_then(Fill::color);
636 if background_color.is_some_and(|color| !color.is_transparent()) {
637 let mut border_color = match background_color {
638 Some(color) => match color.tag {
639 BackgroundTag::Solid => color.solid,
640 BackgroundTag::LinearGradient => color
641 .colors
642 .first()
643 .map(|stop| stop.color)
644 .unwrap_or_default(),
645 BackgroundTag::PatternSlash => color.solid,
646 },
647 None => Hsla::default(),
648 };
649 border_color.a = 0.;
650 window.paint_quad(quad(
651 bounds,
652 corner_radii,
653 background_color.unwrap_or_default(),
654 Edges::default(),
655 border_color,
656 self.border_style,
657 ));
658 }
659
660 continuation(window, cx);
661
662 if self.is_border_visible() {
663 let border_widths = self.border_widths.to_pixels(rem_size);
664 let max_border_width = border_widths.max();
665 let max_corner_radius = corner_radii.max();
666
667 let top_bounds = Bounds::from_corners(
668 bounds.origin,
669 bounds.top_right() + point(Pixels::ZERO, max_border_width.max(max_corner_radius)),
670 );
671 let bottom_bounds = Bounds::from_corners(
672 bounds.bottom_left() - point(Pixels::ZERO, max_border_width.max(max_corner_radius)),
673 bounds.bottom_right(),
674 );
675 let left_bounds = Bounds::from_corners(
676 top_bounds.bottom_left(),
677 bottom_bounds.origin + point(max_border_width, Pixels::ZERO),
678 );
679 let right_bounds = Bounds::from_corners(
680 top_bounds.bottom_right() - point(max_border_width, Pixels::ZERO),
681 bottom_bounds.top_right(),
682 );
683
684 let mut background = self.border_color.unwrap_or_default();
685 background.a = 0.;
686 let quad = quad(
687 bounds,
688 corner_radii,
689 background,
690 border_widths,
691 self.border_color.unwrap_or_default(),
692 self.border_style,
693 );
694
695 window.with_content_mask(Some(ContentMask { bounds: top_bounds }), |window| {
696 window.paint_quad(quad.clone());
697 });
698 window.with_content_mask(
699 Some(ContentMask {
700 bounds: right_bounds,
701 }),
702 |window| {
703 window.paint_quad(quad.clone());
704 },
705 );
706 window.with_content_mask(
707 Some(ContentMask {
708 bounds: bottom_bounds,
709 }),
710 |window| {
711 window.paint_quad(quad.clone());
712 },
713 );
714 window.with_content_mask(
715 Some(ContentMask {
716 bounds: left_bounds,
717 }),
718 |window| {
719 window.paint_quad(quad);
720 },
721 );
722 }
723
724 #[cfg(debug_assertions)]
725 if self.debug_below {
726 cx.remove_global::<DebugBelow>();
727 }
728 }
729
730 fn is_border_visible(&self) -> bool {
731 self.border_color
732 .is_some_and(|color| !color.is_transparent())
733 && self.border_widths.any(|length| !length.is_zero())
734 }
735}
736
737impl Default for Style {
738 fn default() -> Self {
739 Style {
740 display: Display::Block,
741 visibility: Visibility::Visible,
742 overflow: Point {
743 x: Overflow::Visible,
744 y: Overflow::Visible,
745 },
746 allow_concurrent_scroll: false,
747 restrict_scroll_to_axis: false,
748 scrollbar_width: AbsoluteLength::default(),
749 position: Position::Relative,
750 inset: Edges::auto(),
751 margin: Edges::<Length>::zero(),
752 padding: Edges::<DefiniteLength>::zero(),
753 border_widths: Edges::<AbsoluteLength>::zero(),
754 size: Size::auto(),
755 min_size: Size::auto(),
756 max_size: Size::auto(),
757 aspect_ratio: None,
758 gap: Size::default(),
759 // Alignment
760 align_items: None,
761 align_self: None,
762 align_content: None,
763 justify_content: None,
764 // Flexbox
765 flex_direction: FlexDirection::Row,
766 flex_wrap: FlexWrap::NoWrap,
767 flex_grow: 0.0,
768 flex_shrink: 1.0,
769 flex_basis: Length::Auto,
770 background: None,
771 border_color: None,
772 border_style: BorderStyle::default(),
773 corner_radii: Corners::default(),
774 box_shadow: Default::default(),
775 text: TextStyleRefinement::default(),
776 mouse_cursor: None,
777 opacity: None,
778 grid_rows: None,
779 grid_cols: None,
780 grid_location: None,
781
782 #[cfg(debug_assertions)]
783 debug: false,
784 #[cfg(debug_assertions)]
785 debug_below: false,
786 }
787 }
788}
789
790/// The properties that can be applied to an underline.
791#[derive(
792 Refineable, Copy, Clone, Default, Debug, PartialEq, Eq, Hash, Serialize, Deserialize, JsonSchema,
793)]
794pub struct UnderlineStyle {
795 /// The thickness of the underline.
796 pub thickness: Pixels,
797
798 /// The color of the underline.
799 pub color: Option<Hsla>,
800
801 /// Whether the underline should be wavy, like in a spell checker.
802 pub wavy: bool,
803}
804
805/// The properties that can be applied to a strikethrough.
806#[derive(
807 Refineable, Copy, Clone, Default, Debug, PartialEq, Eq, Hash, Serialize, Deserialize, JsonSchema,
808)]
809pub struct StrikethroughStyle {
810 /// The thickness of the strikethrough.
811 pub thickness: Pixels,
812
813 /// The color of the strikethrough.
814 pub color: Option<Hsla>,
815}
816
817/// The kinds of fill that can be applied to a shape.
818#[derive(Clone, Debug, PartialEq, Serialize, Deserialize, JsonSchema)]
819pub enum Fill {
820 /// A solid color fill.
821 Color(Background),
822}
823
824impl Fill {
825 /// Unwrap this fill into a solid color, if it is one.
826 ///
827 /// If the fill is not a solid color, this method returns `None`.
828 pub fn color(&self) -> Option<Background> {
829 match self {
830 Fill::Color(color) => Some(*color),
831 }
832 }
833}
834
835impl Default for Fill {
836 fn default() -> Self {
837 Self::Color(Background::default())
838 }
839}
840
841impl From<Hsla> for Fill {
842 fn from(color: Hsla) -> Self {
843 Self::Color(color.into())
844 }
845}
846
847impl From<Rgba> for Fill {
848 fn from(color: Rgba) -> Self {
849 Self::Color(color.into())
850 }
851}
852
853impl From<Background> for Fill {
854 fn from(background: Background) -> Self {
855 Self::Color(background)
856 }
857}
858
859impl From<TextStyle> for HighlightStyle {
860 fn from(other: TextStyle) -> Self {
861 Self::from(&other)
862 }
863}
864
865impl From<&TextStyle> for HighlightStyle {
866 fn from(other: &TextStyle) -> Self {
867 Self {
868 color: Some(other.color),
869 font_weight: Some(other.font_weight),
870 font_style: Some(other.font_style),
871 background_color: other.background_color,
872 underline: other.underline,
873 strikethrough: other.strikethrough,
874 fade_out: None,
875 }
876 }
877}
878
879impl HighlightStyle {
880 /// Create a highlight style with just a color
881 pub fn color(color: Hsla) -> Self {
882 Self {
883 color: Some(color),
884 ..Default::default()
885 }
886 }
887 /// Blend this highlight style with another.
888 /// Non-continuous properties, like font_weight and font_style, are overwritten.
889 #[must_use]
890 pub fn highlight(self, other: HighlightStyle) -> Self {
891 Self {
892 color: other
893 .color
894 .map(|other_color| {
895 if let Some(color) = self.color {
896 color.blend(other_color)
897 } else {
898 other_color
899 }
900 })
901 .or(self.color),
902 font_weight: other.font_weight.or(self.font_weight),
903 font_style: other.font_style.or(self.font_style),
904 background_color: other.background_color.or(self.background_color),
905 underline: other.underline.or(self.underline),
906 strikethrough: other.strikethrough.or(self.strikethrough),
907 fade_out: other
908 .fade_out
909 .map(|source_fade| {
910 self.fade_out
911 .map(|dest_fade| (dest_fade * (1. + source_fade)).clamp(0., 1.))
912 .unwrap_or(source_fade)
913 })
914 .or(self.fade_out),
915 }
916 }
917}
918
919impl From<Hsla> for HighlightStyle {
920 fn from(color: Hsla) -> Self {
921 Self {
922 color: Some(color),
923 ..Default::default()
924 }
925 }
926}
927
928impl From<FontWeight> for HighlightStyle {
929 fn from(font_weight: FontWeight) -> Self {
930 Self {
931 font_weight: Some(font_weight),
932 ..Default::default()
933 }
934 }
935}
936
937impl From<FontStyle> for HighlightStyle {
938 fn from(font_style: FontStyle) -> Self {
939 Self {
940 font_style: Some(font_style),
941 ..Default::default()
942 }
943 }
944}
945
946impl From<Rgba> for HighlightStyle {
947 fn from(color: Rgba) -> Self {
948 Self {
949 color: Some(color.into()),
950 ..Default::default()
951 }
952 }
953}
954
955/// Combine and merge the highlights and ranges in the two iterators.
956pub fn combine_highlights(
957 a: impl IntoIterator<Item = (Range<usize>, HighlightStyle)>,
958 b: impl IntoIterator<Item = (Range<usize>, HighlightStyle)>,
959) -> impl Iterator<Item = (Range<usize>, HighlightStyle)> {
960 let mut endpoints = Vec::new();
961 let mut highlights = Vec::new();
962 for (range, highlight) in a.into_iter().chain(b) {
963 if !range.is_empty() {
964 let highlight_id = highlights.len();
965 endpoints.push((range.start, highlight_id, true));
966 endpoints.push((range.end, highlight_id, false));
967 highlights.push(highlight);
968 }
969 }
970 endpoints.sort_unstable_by_key(|(position, _, _)| *position);
971 let mut endpoints = endpoints.into_iter().peekable();
972
973 let mut active_styles = HashSet::default();
974 let mut ix = 0;
975 iter::from_fn(move || {
976 while let Some((endpoint_ix, highlight_id, is_start)) = endpoints.peek() {
977 let prev_index = mem::replace(&mut ix, *endpoint_ix);
978 if ix > prev_index && !active_styles.is_empty() {
979 let current_style = active_styles
980 .iter()
981 .fold(HighlightStyle::default(), |acc, highlight_id| {
982 acc.highlight(highlights[*highlight_id])
983 });
984 return Some((prev_index..ix, current_style));
985 }
986
987 if *is_start {
988 active_styles.insert(*highlight_id);
989 } else {
990 active_styles.remove(highlight_id);
991 }
992 endpoints.next();
993 }
994 None
995 })
996}
997
998/// Used to control how child nodes are aligned.
999/// For Flexbox it controls alignment in the cross axis
1000/// For Grid it controls alignment in the block axis
1001///
1002/// [MDN](https://developer.mozilla.org/en-US/docs/Web/CSS/align-items)
1003#[derive(Copy, Clone, PartialEq, Eq, Debug, Serialize, Deserialize, JsonSchema)]
1004// Copy of taffy::style type of the same name, to derive JsonSchema.
1005pub enum AlignItems {
1006 /// Items are packed toward the start of the axis
1007 Start,
1008 /// Items are packed toward the end of the axis
1009 End,
1010 /// Items are packed towards the flex-relative start of the axis.
1011 ///
1012 /// For flex containers with flex_direction RowReverse or ColumnReverse this is equivalent
1013 /// to End. In all other cases it is equivalent to Start.
1014 FlexStart,
1015 /// Items are packed towards the flex-relative end of the axis.
1016 ///
1017 /// For flex containers with flex_direction RowReverse or ColumnReverse this is equivalent
1018 /// to Start. In all other cases it is equivalent to End.
1019 FlexEnd,
1020 /// Items are packed along the center of the cross axis
1021 Center,
1022 /// Items are aligned such as their baselines align
1023 Baseline,
1024 /// Stretch to fill the container
1025 Stretch,
1026}
1027/// Used to control how child nodes are aligned.
1028/// Does not apply to Flexbox, and will be ignored if specified on a flex container
1029/// For Grid it controls alignment in the inline axis
1030///
1031/// [MDN](https://developer.mozilla.org/en-US/docs/Web/CSS/justify-items)
1032pub type JustifyItems = AlignItems;
1033/// Used to control how the specified nodes is aligned.
1034/// Overrides the parent Node's `AlignItems` property.
1035/// For Flexbox it controls alignment in the cross axis
1036/// For Grid it controls alignment in the block axis
1037///
1038/// [MDN](https://developer.mozilla.org/en-US/docs/Web/CSS/align-self)
1039pub type AlignSelf = AlignItems;
1040/// Used to control how the specified nodes is aligned.
1041/// Overrides the parent Node's `JustifyItems` property.
1042/// Does not apply to Flexbox, and will be ignored if specified on a flex child
1043/// For Grid it controls alignment in the inline axis
1044///
1045/// [MDN](https://developer.mozilla.org/en-US/docs/Web/CSS/justify-self)
1046pub type JustifySelf = AlignItems;
1047
1048/// Sets the distribution of space between and around content items
1049/// For Flexbox it controls alignment in the cross axis
1050/// For Grid it controls alignment in the block axis
1051///
1052/// [MDN](https://developer.mozilla.org/en-US/docs/Web/CSS/align-content)
1053#[derive(Copy, Clone, PartialEq, Eq, Debug, Serialize, Deserialize, JsonSchema)]
1054// Copy of taffy::style type of the same name, to derive JsonSchema.
1055pub enum AlignContent {
1056 /// Items are packed toward the start of the axis
1057 Start,
1058 /// Items are packed toward the end of the axis
1059 End,
1060 /// Items are packed towards the flex-relative start of the axis.
1061 ///
1062 /// For flex containers with flex_direction RowReverse or ColumnReverse this is equivalent
1063 /// to End. In all other cases it is equivalent to Start.
1064 FlexStart,
1065 /// Items are packed towards the flex-relative end of the axis.
1066 ///
1067 /// For flex containers with flex_direction RowReverse or ColumnReverse this is equivalent
1068 /// to Start. In all other cases it is equivalent to End.
1069 FlexEnd,
1070 /// Items are centered around the middle of the axis
1071 Center,
1072 /// Items are stretched to fill the container
1073 Stretch,
1074 /// The first and last items are aligned flush with the edges of the container (no gap)
1075 /// The gap between items is distributed evenly.
1076 SpaceBetween,
1077 /// The gap between the first and last items is exactly THE SAME as the gap between items.
1078 /// The gaps are distributed evenly
1079 SpaceEvenly,
1080 /// The gap between the first and last items is exactly HALF the gap between items.
1081 /// The gaps are distributed evenly in proportion to these ratios.
1082 SpaceAround,
1083}
1084
1085/// Sets the distribution of space between and around content items
1086/// For Flexbox it controls alignment in the main axis
1087/// For Grid it controls alignment in the inline axis
1088///
1089/// [MDN](https://developer.mozilla.org/en-US/docs/Web/CSS/justify-content)
1090pub type JustifyContent = AlignContent;
1091
1092/// Sets the layout used for the children of this node
1093///
1094/// The default values depends on on which feature flags are enabled. The order of precedence is: Flex, Grid, Block, None.
1095#[derive(Copy, Clone, PartialEq, Eq, Debug, Default, Serialize, Deserialize, JsonSchema)]
1096// Copy of taffy::style type of the same name, to derive JsonSchema.
1097pub enum Display {
1098 /// The children will follow the block layout algorithm
1099 Block,
1100 /// The children will follow the flexbox layout algorithm
1101 #[default]
1102 Flex,
1103 /// The children will follow the CSS Grid layout algorithm
1104 Grid,
1105 /// The children will not be laid out, and will follow absolute positioning
1106 None,
1107}
1108
1109/// Controls whether flex items are forced onto one line or can wrap onto multiple lines.
1110///
1111/// Defaults to [`FlexWrap::NoWrap`]
1112///
1113/// [Specification](https://www.w3.org/TR/css-flexbox-1/#flex-wrap-property)
1114#[derive(Copy, Clone, PartialEq, Eq, Debug, Default, Serialize, Deserialize, JsonSchema)]
1115// Copy of taffy::style type of the same name, to derive JsonSchema.
1116pub enum FlexWrap {
1117 /// Items will not wrap and stay on a single line
1118 #[default]
1119 NoWrap,
1120 /// Items will wrap according to this item's [`FlexDirection`]
1121 Wrap,
1122 /// Items will wrap in the opposite direction to this item's [`FlexDirection`]
1123 WrapReverse,
1124}
1125
1126/// The direction of the flexbox layout main axis.
1127///
1128/// There are always two perpendicular layout axes: main (or primary) and cross (or secondary).
1129/// Adding items will cause them to be positioned adjacent to each other along the main axis.
1130/// By varying this value throughout your tree, you can create complex axis-aligned layouts.
1131///
1132/// Items are always aligned relative to the cross axis, and justified relative to the main axis.
1133///
1134/// The default behavior is [`FlexDirection::Row`].
1135///
1136/// [Specification](https://www.w3.org/TR/css-flexbox-1/#flex-direction-property)
1137#[derive(Copy, Clone, PartialEq, Eq, Debug, Default, Serialize, Deserialize, JsonSchema)]
1138// Copy of taffy::style type of the same name, to derive JsonSchema.
1139pub enum FlexDirection {
1140 /// Defines +x as the main axis
1141 ///
1142 /// Items will be added from left to right in a row.
1143 #[default]
1144 Row,
1145 /// Defines +y as the main axis
1146 ///
1147 /// Items will be added from top to bottom in a column.
1148 Column,
1149 /// Defines -x as the main axis
1150 ///
1151 /// Items will be added from right to left in a row.
1152 RowReverse,
1153 /// Defines -y as the main axis
1154 ///
1155 /// Items will be added from bottom to top in a column.
1156 ColumnReverse,
1157}
1158
1159/// How children overflowing their container should affect layout
1160///
1161/// In CSS the primary effect of this property is to control whether contents of a parent container that overflow that container should
1162/// be displayed anyway, be clipped, or trigger the container to become a scroll container. However it also has secondary effects on layout,
1163/// the main ones being:
1164///
1165/// - The automatic minimum size Flexbox/CSS Grid items with non-`Visible` overflow is `0` rather than being content based
1166/// - `Overflow::Scroll` nodes have space in the layout reserved for a scrollbar (width controlled by the `scrollbar_width` property)
1167///
1168/// In Taffy, we only implement the layout related secondary effects as we are not concerned with drawing/painting. The amount of space reserved for
1169/// a scrollbar is controlled by the `scrollbar_width` property. If this is `0` then `Scroll` behaves identically to `Hidden`.
1170///
1171/// <https://developer.mozilla.org/en-US/docs/Web/CSS/overflow>
1172#[derive(Copy, Clone, PartialEq, Eq, Debug, Default, Serialize, Deserialize, JsonSchema)]
1173// Copy of taffy::style type of the same name, to derive JsonSchema.
1174pub enum Overflow {
1175 /// The automatic minimum size of this node as a flexbox/grid item should be based on the size of its content.
1176 /// Content that overflows this node *should* contribute to the scroll region of its parent.
1177 #[default]
1178 Visible,
1179 /// The automatic minimum size of this node as a flexbox/grid item should be based on the size of its content.
1180 /// Content that overflows this node should *not* contribute to the scroll region of its parent.
1181 Clip,
1182 /// The automatic minimum size of this node as a flexbox/grid item should be `0`.
1183 /// Content that overflows this node should *not* contribute to the scroll region of its parent.
1184 Hidden,
1185 /// The automatic minimum size of this node as a flexbox/grid item should be `0`. Additionally, space should be reserved
1186 /// for a scrollbar. The amount of space reserved is controlled by the `scrollbar_width` property.
1187 /// Content that overflows this node should *not* contribute to the scroll region of its parent.
1188 Scroll,
1189}
1190
1191/// The positioning strategy for this item.
1192///
1193/// This controls both how the origin is determined for the [`Style::position`] field,
1194/// and whether or not the item will be controlled by flexbox's layout algorithm.
1195///
1196/// WARNING: this enum follows the behavior of [CSS's `position` property](https://developer.mozilla.org/en-US/docs/Web/CSS/position),
1197/// which can be unintuitive.
1198///
1199/// [`Position::Relative`] is the default value, in contrast to the default behavior in CSS.
1200#[derive(Copy, Clone, PartialEq, Eq, Debug, Default, Serialize, Deserialize, JsonSchema)]
1201// Copy of taffy::style type of the same name, to derive JsonSchema.
1202pub enum Position {
1203 /// The offset is computed relative to the final position given by the layout algorithm.
1204 /// Offsets do not affect the position of any other items; they are effectively a correction factor applied at the end.
1205 #[default]
1206 Relative,
1207 /// The offset is computed relative to this item's closest positioned ancestor, if any.
1208 /// Otherwise, it is placed relative to the origin.
1209 /// No space is created for the item in the page layout, and its size will not be altered.
1210 ///
1211 /// WARNING: to opt-out of layouting entirely, you must use [`Display::None`] instead on your [`Style`] object.
1212 Absolute,
1213}
1214
1215impl From<AlignItems> for taffy::style::AlignItems {
1216 fn from(value: AlignItems) -> Self {
1217 match value {
1218 AlignItems::Start => Self::Start,
1219 AlignItems::End => Self::End,
1220 AlignItems::FlexStart => Self::FlexStart,
1221 AlignItems::FlexEnd => Self::FlexEnd,
1222 AlignItems::Center => Self::Center,
1223 AlignItems::Baseline => Self::Baseline,
1224 AlignItems::Stretch => Self::Stretch,
1225 }
1226 }
1227}
1228
1229impl From<AlignContent> for taffy::style::AlignContent {
1230 fn from(value: AlignContent) -> Self {
1231 match value {
1232 AlignContent::Start => Self::Start,
1233 AlignContent::End => Self::End,
1234 AlignContent::FlexStart => Self::FlexStart,
1235 AlignContent::FlexEnd => Self::FlexEnd,
1236 AlignContent::Center => Self::Center,
1237 AlignContent::Stretch => Self::Stretch,
1238 AlignContent::SpaceBetween => Self::SpaceBetween,
1239 AlignContent::SpaceEvenly => Self::SpaceEvenly,
1240 AlignContent::SpaceAround => Self::SpaceAround,
1241 }
1242 }
1243}
1244
1245impl From<Display> for taffy::style::Display {
1246 fn from(value: Display) -> Self {
1247 match value {
1248 Display::Block => Self::Block,
1249 Display::Flex => Self::Flex,
1250 Display::Grid => Self::Grid,
1251 Display::None => Self::None,
1252 }
1253 }
1254}
1255
1256impl From<FlexWrap> for taffy::style::FlexWrap {
1257 fn from(value: FlexWrap) -> Self {
1258 match value {
1259 FlexWrap::NoWrap => Self::NoWrap,
1260 FlexWrap::Wrap => Self::Wrap,
1261 FlexWrap::WrapReverse => Self::WrapReverse,
1262 }
1263 }
1264}
1265
1266impl From<FlexDirection> for taffy::style::FlexDirection {
1267 fn from(value: FlexDirection) -> Self {
1268 match value {
1269 FlexDirection::Row => Self::Row,
1270 FlexDirection::Column => Self::Column,
1271 FlexDirection::RowReverse => Self::RowReverse,
1272 FlexDirection::ColumnReverse => Self::ColumnReverse,
1273 }
1274 }
1275}
1276
1277impl From<Overflow> for taffy::style::Overflow {
1278 fn from(value: Overflow) -> Self {
1279 match value {
1280 Overflow::Visible => Self::Visible,
1281 Overflow::Clip => Self::Clip,
1282 Overflow::Hidden => Self::Hidden,
1283 Overflow::Scroll => Self::Scroll,
1284 }
1285 }
1286}
1287
1288impl From<Position> for taffy::style::Position {
1289 fn from(value: Position) -> Self {
1290 match value {
1291 Position::Relative => Self::Relative,
1292 Position::Absolute => Self::Absolute,
1293 }
1294 }
1295}
1296
1297#[cfg(test)]
1298mod tests {
1299 use crate::{blue, green, px, red, yellow};
1300
1301 use super::*;
1302
1303 #[test]
1304 fn test_basic_highlight_style_combination() {
1305 let style_a = HighlightStyle::default();
1306 let style_b = HighlightStyle::default();
1307 let style_a = style_a.highlight(style_b);
1308 assert_eq!(
1309 style_a,
1310 HighlightStyle::default(),
1311 "Combining empty styles should not produce a non-empty style."
1312 );
1313
1314 let mut style_b = HighlightStyle {
1315 color: Some(red()),
1316 strikethrough: Some(StrikethroughStyle {
1317 thickness: px(2.),
1318 color: Some(blue()),
1319 }),
1320 fade_out: Some(0.),
1321 font_style: Some(FontStyle::Italic),
1322 font_weight: Some(FontWeight(300.)),
1323 background_color: Some(yellow()),
1324 underline: Some(UnderlineStyle {
1325 thickness: px(2.),
1326 color: Some(red()),
1327 wavy: true,
1328 }),
1329 };
1330 let expected_style = style_b;
1331
1332 let style_a = style_a.highlight(style_b);
1333 assert_eq!(
1334 style_a, expected_style,
1335 "Blending an empty style with another style should return the other style"
1336 );
1337
1338 let style_b = style_b.highlight(Default::default());
1339 assert_eq!(
1340 style_b, expected_style,
1341 "Blending a style with an empty style should not change the style."
1342 );
1343
1344 let mut style_c = expected_style;
1345
1346 let style_d = HighlightStyle {
1347 color: Some(blue().alpha(0.7)),
1348 strikethrough: Some(StrikethroughStyle {
1349 thickness: px(4.),
1350 color: Some(crate::red()),
1351 }),
1352 fade_out: Some(0.),
1353 font_style: Some(FontStyle::Oblique),
1354 font_weight: Some(FontWeight(800.)),
1355 background_color: Some(green()),
1356 underline: Some(UnderlineStyle {
1357 thickness: px(4.),
1358 color: None,
1359 wavy: false,
1360 }),
1361 };
1362
1363 let expected_style = HighlightStyle {
1364 color: Some(red().blend(blue().alpha(0.7))),
1365 strikethrough: Some(StrikethroughStyle {
1366 thickness: px(4.),
1367 color: Some(red()),
1368 }),
1369 // TODO this does not seem right
1370 fade_out: Some(0.),
1371 font_style: Some(FontStyle::Oblique),
1372 font_weight: Some(FontWeight(800.)),
1373 background_color: Some(green()),
1374 underline: Some(UnderlineStyle {
1375 thickness: px(4.),
1376 color: None,
1377 wavy: false,
1378 }),
1379 };
1380
1381 let style_c = style_c.highlight(style_d);
1382 assert_eq!(
1383 style_c, expected_style,
1384 "Blending styles should blend properties where possible and override all others"
1385 );
1386 }
1387
1388 #[test]
1389 fn test_combine_highlights() {
1390 assert_eq!(
1391 combine_highlights(
1392 [
1393 (0..5, green().into()),
1394 (4..10, FontWeight::BOLD.into()),
1395 (15..20, yellow().into()),
1396 ],
1397 [
1398 (2..6, FontStyle::Italic.into()),
1399 (1..3, blue().into()),
1400 (21..23, red().into()),
1401 ]
1402 )
1403 .collect::<Vec<_>>(),
1404 [
1405 (
1406 0..1,
1407 HighlightStyle {
1408 color: Some(green()),
1409 ..Default::default()
1410 }
1411 ),
1412 (
1413 1..2,
1414 HighlightStyle {
1415 color: Some(blue()),
1416 ..Default::default()
1417 }
1418 ),
1419 (
1420 2..3,
1421 HighlightStyle {
1422 color: Some(blue()),
1423 font_style: Some(FontStyle::Italic),
1424 ..Default::default()
1425 }
1426 ),
1427 (
1428 3..4,
1429 HighlightStyle {
1430 color: Some(green()),
1431 font_style: Some(FontStyle::Italic),
1432 ..Default::default()
1433 }
1434 ),
1435 (
1436 4..5,
1437 HighlightStyle {
1438 color: Some(green()),
1439 font_weight: Some(FontWeight::BOLD),
1440 font_style: Some(FontStyle::Italic),
1441 ..Default::default()
1442 }
1443 ),
1444 (
1445 5..6,
1446 HighlightStyle {
1447 font_weight: Some(FontWeight::BOLD),
1448 font_style: Some(FontStyle::Italic),
1449 ..Default::default()
1450 }
1451 ),
1452 (
1453 6..10,
1454 HighlightStyle {
1455 font_weight: Some(FontWeight::BOLD),
1456 ..Default::default()
1457 }
1458 ),
1459 (
1460 15..20,
1461 HighlightStyle {
1462 color: Some(yellow()),
1463 ..Default::default()
1464 }
1465 ),
1466 (
1467 21..23,
1468 HighlightStyle {
1469 color: Some(red()),
1470 ..Default::default()
1471 }
1472 )
1473 ]
1474 );
1475 }
1476}