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: ".SystemUIFont".into(),
407 font_features: FontFeatures::default(),
408 font_fallbacks: None,
409 font_size: rems(1.).into(),
410 line_height: phi(),
411 font_weight: FontWeight::default(),
412 font_style: FontStyle::default(),
413 background_color: None,
414 underline: None,
415 strikethrough: None,
416 white_space: WhiteSpace::Normal,
417 text_overflow: None,
418 text_align: TextAlign::default(),
419 line_clamp: None,
420 }
421 }
422}
423
424impl TextStyle {
425 /// Create a new text style with the given highlighting applied.
426 pub fn highlight(mut self, style: impl Into<HighlightStyle>) -> Self {
427 let style = style.into();
428 if let Some(weight) = style.font_weight {
429 self.font_weight = weight;
430 }
431 if let Some(style) = style.font_style {
432 self.font_style = style;
433 }
434
435 if let Some(color) = style.color {
436 self.color = self.color.blend(color);
437 }
438
439 if let Some(factor) = style.fade_out {
440 self.color.fade_out(factor);
441 }
442
443 if let Some(background_color) = style.background_color {
444 self.background_color = Some(background_color);
445 }
446
447 if let Some(underline) = style.underline {
448 self.underline = Some(underline);
449 }
450
451 if let Some(strikethrough) = style.strikethrough {
452 self.strikethrough = Some(strikethrough);
453 }
454
455 self
456 }
457
458 /// Get the font configured for this text style.
459 pub fn font(&self) -> Font {
460 Font {
461 family: self.font_family.clone(),
462 features: self.font_features.clone(),
463 fallbacks: self.font_fallbacks.clone(),
464 weight: self.font_weight,
465 style: self.font_style,
466 }
467 }
468
469 /// Returns the rounded line height in pixels.
470 pub fn line_height_in_pixels(&self, rem_size: Pixels) -> Pixels {
471 self.line_height.to_pixels(self.font_size, rem_size).round()
472 }
473
474 /// Convert this text style into a [`TextRun`], for the given length of the text.
475 pub fn to_run(&self, len: usize) -> TextRun {
476 TextRun {
477 len,
478 font: Font {
479 family: self.font_family.clone(),
480 features: self.font_features.clone(),
481 fallbacks: self.font_fallbacks.clone(),
482 weight: self.font_weight,
483 style: self.font_style,
484 },
485 color: self.color,
486 background_color: self.background_color,
487 underline: self.underline,
488 strikethrough: self.strikethrough,
489 }
490 }
491}
492
493/// A highlight style to apply, similar to a `TextStyle` except
494/// for a single font, uniformly sized and spaced text.
495#[derive(Copy, Clone, Debug, Default, PartialEq)]
496pub struct HighlightStyle {
497 /// The color of the text
498 pub color: Option<Hsla>,
499
500 /// The font weight, e.g. bold
501 pub font_weight: Option<FontWeight>,
502
503 /// The font style, e.g. italic
504 pub font_style: Option<FontStyle>,
505
506 /// The background color of the text
507 pub background_color: Option<Hsla>,
508
509 /// The underline style of the text
510 pub underline: Option<UnderlineStyle>,
511
512 /// The underline style of the text
513 pub strikethrough: Option<StrikethroughStyle>,
514
515 /// Similar to the CSS `opacity` property, this will cause the text to be less vibrant.
516 pub fade_out: Option<f32>,
517}
518
519impl Eq for HighlightStyle {}
520
521impl Hash for HighlightStyle {
522 fn hash<H: Hasher>(&self, state: &mut H) {
523 self.color.hash(state);
524 self.font_weight.hash(state);
525 self.font_style.hash(state);
526 self.background_color.hash(state);
527 self.underline.hash(state);
528 self.strikethrough.hash(state);
529 state.write_u32(u32::from_be_bytes(
530 self.fade_out.map(|f| f.to_be_bytes()).unwrap_or_default(),
531 ));
532 }
533}
534
535impl Style {
536 /// Returns true if the style is visible and the background is opaque.
537 pub fn has_opaque_background(&self) -> bool {
538 self.background
539 .as_ref()
540 .is_some_and(|fill| fill.color().is_some_and(|color| !color.is_transparent()))
541 }
542
543 /// Get the text style in this element style.
544 pub fn text_style(&self) -> Option<&TextStyleRefinement> {
545 if self.text.is_some() {
546 Some(&self.text)
547 } else {
548 None
549 }
550 }
551
552 /// Get the content mask for this element style, based on the given bounds.
553 /// If the element does not hide its overflow, this will return `None`.
554 pub fn overflow_mask(
555 &self,
556 bounds: Bounds<Pixels>,
557 rem_size: Pixels,
558 ) -> Option<ContentMask<Pixels>> {
559 match self.overflow {
560 Point {
561 x: Overflow::Visible,
562 y: Overflow::Visible,
563 } => None,
564 _ => {
565 let mut min = bounds.origin;
566 let mut max = bounds.bottom_right();
567
568 if self
569 .border_color
570 .is_some_and(|color| !color.is_transparent())
571 {
572 min.x += self.border_widths.left.to_pixels(rem_size);
573 max.x -= self.border_widths.right.to_pixels(rem_size);
574 min.y += self.border_widths.top.to_pixels(rem_size);
575 max.y -= self.border_widths.bottom.to_pixels(rem_size);
576 }
577
578 let bounds = match (
579 self.overflow.x == Overflow::Visible,
580 self.overflow.y == Overflow::Visible,
581 ) {
582 // x and y both visible
583 (true, true) => return None,
584 // x visible, y hidden
585 (true, false) => Bounds::from_corners(
586 point(min.x, bounds.origin.y),
587 point(max.x, bounds.bottom_right().y),
588 ),
589 // x hidden, y visible
590 (false, true) => Bounds::from_corners(
591 point(bounds.origin.x, min.y),
592 point(bounds.bottom_right().x, max.y),
593 ),
594 // both hidden
595 (false, false) => Bounds::from_corners(min, max),
596 };
597
598 Some(ContentMask { bounds })
599 }
600 }
601 }
602
603 /// Paints the background of an element styled with this style.
604 pub fn paint(
605 &self,
606 bounds: Bounds<Pixels>,
607 window: &mut Window,
608 cx: &mut App,
609 continuation: impl FnOnce(&mut Window, &mut App),
610 ) {
611 #[cfg(debug_assertions)]
612 if self.debug_below {
613 cx.set_global(DebugBelow)
614 }
615
616 #[cfg(debug_assertions)]
617 if self.debug || cx.has_global::<DebugBelow>() {
618 window.paint_quad(crate::outline(bounds, crate::red(), BorderStyle::default()));
619 }
620
621 let rem_size = window.rem_size();
622 let corner_radii = self
623 .corner_radii
624 .to_pixels(rem_size)
625 .clamp_radii_for_quad_size(bounds.size);
626
627 window.paint_shadows(bounds, corner_radii, &self.box_shadow);
628
629 let background_color = self.background.as_ref().and_then(Fill::color);
630 if background_color.is_some_and(|color| !color.is_transparent()) {
631 let mut border_color = match background_color {
632 Some(color) => match color.tag {
633 BackgroundTag::Solid => color.solid,
634 BackgroundTag::LinearGradient => color
635 .colors
636 .first()
637 .map(|stop| stop.color)
638 .unwrap_or_default(),
639 BackgroundTag::PatternSlash => color.solid,
640 },
641 None => Hsla::default(),
642 };
643 border_color.a = 0.;
644 window.paint_quad(quad(
645 bounds,
646 corner_radii,
647 background_color.unwrap_or_default(),
648 Edges::default(),
649 border_color,
650 self.border_style,
651 ));
652 }
653
654 continuation(window, cx);
655
656 if self.is_border_visible() {
657 let border_widths = self.border_widths.to_pixels(rem_size);
658 let max_border_width = border_widths.max();
659 let max_corner_radius = corner_radii.max();
660
661 let top_bounds = Bounds::from_corners(
662 bounds.origin,
663 bounds.top_right() + point(Pixels::ZERO, max_border_width.max(max_corner_radius)),
664 );
665 let bottom_bounds = Bounds::from_corners(
666 bounds.bottom_left() - point(Pixels::ZERO, max_border_width.max(max_corner_radius)),
667 bounds.bottom_right(),
668 );
669 let left_bounds = Bounds::from_corners(
670 top_bounds.bottom_left(),
671 bottom_bounds.origin + point(max_border_width, Pixels::ZERO),
672 );
673 let right_bounds = Bounds::from_corners(
674 top_bounds.bottom_right() - point(max_border_width, Pixels::ZERO),
675 bottom_bounds.top_right(),
676 );
677
678 let mut background = self.border_color.unwrap_or_default();
679 background.a = 0.;
680 let quad = quad(
681 bounds,
682 corner_radii,
683 background,
684 border_widths,
685 self.border_color.unwrap_or_default(),
686 self.border_style,
687 );
688
689 window.with_content_mask(Some(ContentMask { bounds: top_bounds }), |window| {
690 window.paint_quad(quad.clone());
691 });
692 window.with_content_mask(
693 Some(ContentMask {
694 bounds: right_bounds,
695 }),
696 |window| {
697 window.paint_quad(quad.clone());
698 },
699 );
700 window.with_content_mask(
701 Some(ContentMask {
702 bounds: bottom_bounds,
703 }),
704 |window| {
705 window.paint_quad(quad.clone());
706 },
707 );
708 window.with_content_mask(
709 Some(ContentMask {
710 bounds: left_bounds,
711 }),
712 |window| {
713 window.paint_quad(quad);
714 },
715 );
716 }
717
718 #[cfg(debug_assertions)]
719 if self.debug_below {
720 cx.remove_global::<DebugBelow>();
721 }
722 }
723
724 fn is_border_visible(&self) -> bool {
725 self.border_color
726 .is_some_and(|color| !color.is_transparent())
727 && self.border_widths.any(|length| !length.is_zero())
728 }
729}
730
731impl Default for Style {
732 fn default() -> Self {
733 Style {
734 display: Display::Block,
735 visibility: Visibility::Visible,
736 overflow: Point {
737 x: Overflow::Visible,
738 y: Overflow::Visible,
739 },
740 allow_concurrent_scroll: false,
741 restrict_scroll_to_axis: false,
742 scrollbar_width: AbsoluteLength::default(),
743 position: Position::Relative,
744 inset: Edges::auto(),
745 margin: Edges::<Length>::zero(),
746 padding: Edges::<DefiniteLength>::zero(),
747 border_widths: Edges::<AbsoluteLength>::zero(),
748 size: Size::auto(),
749 min_size: Size::auto(),
750 max_size: Size::auto(),
751 aspect_ratio: None,
752 gap: Size::default(),
753 // Alignment
754 align_items: None,
755 align_self: None,
756 align_content: None,
757 justify_content: None,
758 // Flexbox
759 flex_direction: FlexDirection::Row,
760 flex_wrap: FlexWrap::NoWrap,
761 flex_grow: 0.0,
762 flex_shrink: 1.0,
763 flex_basis: Length::Auto,
764 background: None,
765 border_color: None,
766 border_style: BorderStyle::default(),
767 corner_radii: Corners::default(),
768 box_shadow: Default::default(),
769 text: TextStyleRefinement::default(),
770 mouse_cursor: None,
771 opacity: None,
772 grid_rows: None,
773 grid_cols: None,
774 grid_location: None,
775
776 #[cfg(debug_assertions)]
777 debug: false,
778 #[cfg(debug_assertions)]
779 debug_below: false,
780 }
781 }
782}
783
784/// The properties that can be applied to an underline.
785#[derive(
786 Refineable, Copy, Clone, Default, Debug, PartialEq, Eq, Hash, Serialize, Deserialize, JsonSchema,
787)]
788pub struct UnderlineStyle {
789 /// The thickness of the underline.
790 pub thickness: Pixels,
791
792 /// The color of the underline.
793 pub color: Option<Hsla>,
794
795 /// Whether the underline should be wavy, like in a spell checker.
796 pub wavy: bool,
797}
798
799/// The properties that can be applied to a strikethrough.
800#[derive(
801 Refineable, Copy, Clone, Default, Debug, PartialEq, Eq, Hash, Serialize, Deserialize, JsonSchema,
802)]
803pub struct StrikethroughStyle {
804 /// The thickness of the strikethrough.
805 pub thickness: Pixels,
806
807 /// The color of the strikethrough.
808 pub color: Option<Hsla>,
809}
810
811/// The kinds of fill that can be applied to a shape.
812#[derive(Clone, Debug, PartialEq, Serialize, Deserialize, JsonSchema)]
813pub enum Fill {
814 /// A solid color fill.
815 Color(Background),
816}
817
818impl Fill {
819 /// Unwrap this fill into a solid color, if it is one.
820 ///
821 /// If the fill is not a solid color, this method returns `None`.
822 pub fn color(&self) -> Option<Background> {
823 match self {
824 Fill::Color(color) => Some(*color),
825 }
826 }
827}
828
829impl Default for Fill {
830 fn default() -> Self {
831 Self::Color(Background::default())
832 }
833}
834
835impl From<Hsla> for Fill {
836 fn from(color: Hsla) -> Self {
837 Self::Color(color.into())
838 }
839}
840
841impl From<Rgba> for Fill {
842 fn from(color: Rgba) -> Self {
843 Self::Color(color.into())
844 }
845}
846
847impl From<Background> for Fill {
848 fn from(background: Background) -> Self {
849 Self::Color(background)
850 }
851}
852
853impl From<TextStyle> for HighlightStyle {
854 fn from(other: TextStyle) -> Self {
855 Self::from(&other)
856 }
857}
858
859impl From<&TextStyle> for HighlightStyle {
860 fn from(other: &TextStyle) -> Self {
861 Self {
862 color: Some(other.color),
863 font_weight: Some(other.font_weight),
864 font_style: Some(other.font_style),
865 background_color: other.background_color,
866 underline: other.underline,
867 strikethrough: other.strikethrough,
868 fade_out: None,
869 }
870 }
871}
872
873impl HighlightStyle {
874 /// Create a highlight style with just a color
875 pub fn color(color: Hsla) -> Self {
876 Self {
877 color: Some(color),
878 ..Default::default()
879 }
880 }
881 /// Blend this highlight style with another.
882 /// Non-continuous properties, like font_weight and font_style, are overwritten.
883 #[must_use]
884 pub fn highlight(self, other: HighlightStyle) -> Self {
885 Self {
886 color: other
887 .color
888 .map(|other_color| {
889 if let Some(color) = self.color {
890 color.blend(other_color)
891 } else {
892 other_color
893 }
894 })
895 .or(self.color),
896 font_weight: other.font_weight.or(self.font_weight),
897 font_style: other.font_style.or(self.font_style),
898 background_color: other.background_color.or(self.background_color),
899 underline: other.underline.or(self.underline),
900 strikethrough: other.strikethrough.or(self.strikethrough),
901 fade_out: other
902 .fade_out
903 .map(|source_fade| {
904 self.fade_out
905 .map(|dest_fade| (dest_fade * (1. + source_fade)).clamp(0., 1.))
906 .unwrap_or(source_fade)
907 })
908 .or(self.fade_out),
909 }
910 }
911}
912
913impl From<Hsla> for HighlightStyle {
914 fn from(color: Hsla) -> Self {
915 Self {
916 color: Some(color),
917 ..Default::default()
918 }
919 }
920}
921
922impl From<FontWeight> for HighlightStyle {
923 fn from(font_weight: FontWeight) -> Self {
924 Self {
925 font_weight: Some(font_weight),
926 ..Default::default()
927 }
928 }
929}
930
931impl From<FontStyle> for HighlightStyle {
932 fn from(font_style: FontStyle) -> Self {
933 Self {
934 font_style: Some(font_style),
935 ..Default::default()
936 }
937 }
938}
939
940impl From<Rgba> for HighlightStyle {
941 fn from(color: Rgba) -> Self {
942 Self {
943 color: Some(color.into()),
944 ..Default::default()
945 }
946 }
947}
948
949/// Combine and merge the highlights and ranges in the two iterators.
950pub fn combine_highlights(
951 a: impl IntoIterator<Item = (Range<usize>, HighlightStyle)>,
952 b: impl IntoIterator<Item = (Range<usize>, HighlightStyle)>,
953) -> impl Iterator<Item = (Range<usize>, HighlightStyle)> {
954 let mut endpoints = Vec::new();
955 let mut highlights = Vec::new();
956 for (range, highlight) in a.into_iter().chain(b) {
957 if !range.is_empty() {
958 let highlight_id = highlights.len();
959 endpoints.push((range.start, highlight_id, true));
960 endpoints.push((range.end, highlight_id, false));
961 highlights.push(highlight);
962 }
963 }
964 endpoints.sort_unstable_by_key(|(position, _, _)| *position);
965 let mut endpoints = endpoints.into_iter().peekable();
966
967 let mut active_styles = HashSet::default();
968 let mut ix = 0;
969 iter::from_fn(move || {
970 while let Some((endpoint_ix, highlight_id, is_start)) = endpoints.peek() {
971 let prev_index = mem::replace(&mut ix, *endpoint_ix);
972 if ix > prev_index && !active_styles.is_empty() {
973 let current_style = active_styles
974 .iter()
975 .fold(HighlightStyle::default(), |acc, highlight_id| {
976 acc.highlight(highlights[*highlight_id])
977 });
978 return Some((prev_index..ix, current_style));
979 }
980
981 if *is_start {
982 active_styles.insert(*highlight_id);
983 } else {
984 active_styles.remove(highlight_id);
985 }
986 endpoints.next();
987 }
988 None
989 })
990}
991
992/// Used to control how child nodes are aligned.
993/// For Flexbox it controls alignment in the cross axis
994/// For Grid it controls alignment in the block axis
995///
996/// [MDN](https://developer.mozilla.org/en-US/docs/Web/CSS/align-items)
997#[derive(Copy, Clone, PartialEq, Eq, Debug, Serialize, Deserialize, JsonSchema)]
998// Copy of taffy::style type of the same name, to derive JsonSchema.
999pub enum AlignItems {
1000 /// Items are packed toward the start of the axis
1001 Start,
1002 /// Items are packed toward the end of the axis
1003 End,
1004 /// Items are packed towards the flex-relative start of the axis.
1005 ///
1006 /// For flex containers with flex_direction RowReverse or ColumnReverse this is equivalent
1007 /// to End. In all other cases it is equivalent to Start.
1008 FlexStart,
1009 /// Items are packed towards the flex-relative end of the axis.
1010 ///
1011 /// For flex containers with flex_direction RowReverse or ColumnReverse this is equivalent
1012 /// to Start. In all other cases it is equivalent to End.
1013 FlexEnd,
1014 /// Items are packed along the center of the cross axis
1015 Center,
1016 /// Items are aligned such as their baselines align
1017 Baseline,
1018 /// Stretch to fill the container
1019 Stretch,
1020}
1021/// Used to control how child nodes are aligned.
1022/// Does not apply to Flexbox, and will be ignored if specified on a flex container
1023/// For Grid it controls alignment in the inline axis
1024///
1025/// [MDN](https://developer.mozilla.org/en-US/docs/Web/CSS/justify-items)
1026pub type JustifyItems = AlignItems;
1027/// Used to control how the specified nodes is aligned.
1028/// Overrides the parent Node's `AlignItems` property.
1029/// For Flexbox it controls alignment in the cross axis
1030/// For Grid it controls alignment in the block axis
1031///
1032/// [MDN](https://developer.mozilla.org/en-US/docs/Web/CSS/align-self)
1033pub type AlignSelf = AlignItems;
1034/// Used to control how the specified nodes is aligned.
1035/// Overrides the parent Node's `JustifyItems` property.
1036/// Does not apply to Flexbox, and will be ignored if specified on a flex child
1037/// For Grid it controls alignment in the inline axis
1038///
1039/// [MDN](https://developer.mozilla.org/en-US/docs/Web/CSS/justify-self)
1040pub type JustifySelf = AlignItems;
1041
1042/// Sets the distribution of space between and around content items
1043/// For Flexbox it controls alignment in the cross axis
1044/// For Grid it controls alignment in the block axis
1045///
1046/// [MDN](https://developer.mozilla.org/en-US/docs/Web/CSS/align-content)
1047#[derive(Copy, Clone, PartialEq, Eq, Debug, Serialize, Deserialize, JsonSchema)]
1048// Copy of taffy::style type of the same name, to derive JsonSchema.
1049pub enum AlignContent {
1050 /// Items are packed toward the start of the axis
1051 Start,
1052 /// Items are packed toward the end of the axis
1053 End,
1054 /// Items are packed towards the flex-relative start of the axis.
1055 ///
1056 /// For flex containers with flex_direction RowReverse or ColumnReverse this is equivalent
1057 /// to End. In all other cases it is equivalent to Start.
1058 FlexStart,
1059 /// Items are packed towards the flex-relative end of the axis.
1060 ///
1061 /// For flex containers with flex_direction RowReverse or ColumnReverse this is equivalent
1062 /// to Start. In all other cases it is equivalent to End.
1063 FlexEnd,
1064 /// Items are centered around the middle of the axis
1065 Center,
1066 /// Items are stretched to fill the container
1067 Stretch,
1068 /// The first and last items are aligned flush with the edges of the container (no gap)
1069 /// The gap between items is distributed evenly.
1070 SpaceBetween,
1071 /// The gap between the first and last items is exactly THE SAME as the gap between items.
1072 /// The gaps are distributed evenly
1073 SpaceEvenly,
1074 /// The gap between the first and last items is exactly HALF the gap between items.
1075 /// The gaps are distributed evenly in proportion to these ratios.
1076 SpaceAround,
1077}
1078
1079/// Sets the distribution of space between and around content items
1080/// For Flexbox it controls alignment in the main axis
1081/// For Grid it controls alignment in the inline axis
1082///
1083/// [MDN](https://developer.mozilla.org/en-US/docs/Web/CSS/justify-content)
1084pub type JustifyContent = AlignContent;
1085
1086/// Sets the layout used for the children of this node
1087///
1088/// The default values depends on on which feature flags are enabled. The order of precedence is: Flex, Grid, Block, None.
1089#[derive(Copy, Clone, PartialEq, Eq, Debug, Default, Serialize, Deserialize, JsonSchema)]
1090// Copy of taffy::style type of the same name, to derive JsonSchema.
1091pub enum Display {
1092 /// The children will follow the block layout algorithm
1093 Block,
1094 /// The children will follow the flexbox layout algorithm
1095 #[default]
1096 Flex,
1097 /// The children will follow the CSS Grid layout algorithm
1098 Grid,
1099 /// The children will not be laid out, and will follow absolute positioning
1100 None,
1101}
1102
1103/// Controls whether flex items are forced onto one line or can wrap onto multiple lines.
1104///
1105/// Defaults to [`FlexWrap::NoWrap`]
1106///
1107/// [Specification](https://www.w3.org/TR/css-flexbox-1/#flex-wrap-property)
1108#[derive(Copy, Clone, PartialEq, Eq, Debug, Default, Serialize, Deserialize, JsonSchema)]
1109// Copy of taffy::style type of the same name, to derive JsonSchema.
1110pub enum FlexWrap {
1111 /// Items will not wrap and stay on a single line
1112 #[default]
1113 NoWrap,
1114 /// Items will wrap according to this item's [`FlexDirection`]
1115 Wrap,
1116 /// Items will wrap in the opposite direction to this item's [`FlexDirection`]
1117 WrapReverse,
1118}
1119
1120/// The direction of the flexbox layout main axis.
1121///
1122/// There are always two perpendicular layout axes: main (or primary) and cross (or secondary).
1123/// Adding items will cause them to be positioned adjacent to each other along the main axis.
1124/// By varying this value throughout your tree, you can create complex axis-aligned layouts.
1125///
1126/// Items are always aligned relative to the cross axis, and justified relative to the main axis.
1127///
1128/// The default behavior is [`FlexDirection::Row`].
1129///
1130/// [Specification](https://www.w3.org/TR/css-flexbox-1/#flex-direction-property)
1131#[derive(Copy, Clone, PartialEq, Eq, Debug, Default, Serialize, Deserialize, JsonSchema)]
1132// Copy of taffy::style type of the same name, to derive JsonSchema.
1133pub enum FlexDirection {
1134 /// Defines +x as the main axis
1135 ///
1136 /// Items will be added from left to right in a row.
1137 #[default]
1138 Row,
1139 /// Defines +y as the main axis
1140 ///
1141 /// Items will be added from top to bottom in a column.
1142 Column,
1143 /// Defines -x as the main axis
1144 ///
1145 /// Items will be added from right to left in a row.
1146 RowReverse,
1147 /// Defines -y as the main axis
1148 ///
1149 /// Items will be added from bottom to top in a column.
1150 ColumnReverse,
1151}
1152
1153/// How children overflowing their container should affect layout
1154///
1155/// In CSS the primary effect of this property is to control whether contents of a parent container that overflow that container should
1156/// be displayed anyway, be clipped, or trigger the container to become a scroll container. However it also has secondary effects on layout,
1157/// the main ones being:
1158///
1159/// - The automatic minimum size Flexbox/CSS Grid items with non-`Visible` overflow is `0` rather than being content based
1160/// - `Overflow::Scroll` nodes have space in the layout reserved for a scrollbar (width controlled by the `scrollbar_width` property)
1161///
1162/// In Taffy, we only implement the layout related secondary effects as we are not concerned with drawing/painting. The amount of space reserved for
1163/// a scrollbar is controlled by the `scrollbar_width` property. If this is `0` then `Scroll` behaves identically to `Hidden`.
1164///
1165/// <https://developer.mozilla.org/en-US/docs/Web/CSS/overflow>
1166#[derive(Copy, Clone, PartialEq, Eq, Debug, Default, Serialize, Deserialize, JsonSchema)]
1167// Copy of taffy::style type of the same name, to derive JsonSchema.
1168pub enum Overflow {
1169 /// The automatic minimum size of this node as a flexbox/grid item should be based on the size of its content.
1170 /// Content that overflows this node *should* contribute to the scroll region of its parent.
1171 #[default]
1172 Visible,
1173 /// The automatic minimum size of this node as a flexbox/grid item should be based on the size of its content.
1174 /// Content that overflows this node should *not* contribute to the scroll region of its parent.
1175 Clip,
1176 /// The automatic minimum size of this node as a flexbox/grid item should be `0`.
1177 /// Content that overflows this node should *not* contribute to the scroll region of its parent.
1178 Hidden,
1179 /// The automatic minimum size of this node as a flexbox/grid item should be `0`. Additionally, space should be reserved
1180 /// for a scrollbar. The amount of space reserved is controlled by the `scrollbar_width` property.
1181 /// Content that overflows this node should *not* contribute to the scroll region of its parent.
1182 Scroll,
1183}
1184
1185/// The positioning strategy for this item.
1186///
1187/// This controls both how the origin is determined for the [`Style::position`] field,
1188/// and whether or not the item will be controlled by flexbox's layout algorithm.
1189///
1190/// WARNING: this enum follows the behavior of [CSS's `position` property](https://developer.mozilla.org/en-US/docs/Web/CSS/position),
1191/// which can be unintuitive.
1192///
1193/// [`Position::Relative`] is the default value, in contrast to the default behavior in CSS.
1194#[derive(Copy, Clone, PartialEq, Eq, Debug, Default, Serialize, Deserialize, JsonSchema)]
1195// Copy of taffy::style type of the same name, to derive JsonSchema.
1196pub enum Position {
1197 /// The offset is computed relative to the final position given by the layout algorithm.
1198 /// Offsets do not affect the position of any other items; they are effectively a correction factor applied at the end.
1199 #[default]
1200 Relative,
1201 /// The offset is computed relative to this item's closest positioned ancestor, if any.
1202 /// Otherwise, it is placed relative to the origin.
1203 /// No space is created for the item in the page layout, and its size will not be altered.
1204 ///
1205 /// WARNING: to opt-out of layouting entirely, you must use [`Display::None`] instead on your [`Style`] object.
1206 Absolute,
1207}
1208
1209impl From<AlignItems> for taffy::style::AlignItems {
1210 fn from(value: AlignItems) -> Self {
1211 match value {
1212 AlignItems::Start => Self::Start,
1213 AlignItems::End => Self::End,
1214 AlignItems::FlexStart => Self::FlexStart,
1215 AlignItems::FlexEnd => Self::FlexEnd,
1216 AlignItems::Center => Self::Center,
1217 AlignItems::Baseline => Self::Baseline,
1218 AlignItems::Stretch => Self::Stretch,
1219 }
1220 }
1221}
1222
1223impl From<AlignContent> for taffy::style::AlignContent {
1224 fn from(value: AlignContent) -> Self {
1225 match value {
1226 AlignContent::Start => Self::Start,
1227 AlignContent::End => Self::End,
1228 AlignContent::FlexStart => Self::FlexStart,
1229 AlignContent::FlexEnd => Self::FlexEnd,
1230 AlignContent::Center => Self::Center,
1231 AlignContent::Stretch => Self::Stretch,
1232 AlignContent::SpaceBetween => Self::SpaceBetween,
1233 AlignContent::SpaceEvenly => Self::SpaceEvenly,
1234 AlignContent::SpaceAround => Self::SpaceAround,
1235 }
1236 }
1237}
1238
1239impl From<Display> for taffy::style::Display {
1240 fn from(value: Display) -> Self {
1241 match value {
1242 Display::Block => Self::Block,
1243 Display::Flex => Self::Flex,
1244 Display::Grid => Self::Grid,
1245 Display::None => Self::None,
1246 }
1247 }
1248}
1249
1250impl From<FlexWrap> for taffy::style::FlexWrap {
1251 fn from(value: FlexWrap) -> Self {
1252 match value {
1253 FlexWrap::NoWrap => Self::NoWrap,
1254 FlexWrap::Wrap => Self::Wrap,
1255 FlexWrap::WrapReverse => Self::WrapReverse,
1256 }
1257 }
1258}
1259
1260impl From<FlexDirection> for taffy::style::FlexDirection {
1261 fn from(value: FlexDirection) -> Self {
1262 match value {
1263 FlexDirection::Row => Self::Row,
1264 FlexDirection::Column => Self::Column,
1265 FlexDirection::RowReverse => Self::RowReverse,
1266 FlexDirection::ColumnReverse => Self::ColumnReverse,
1267 }
1268 }
1269}
1270
1271impl From<Overflow> for taffy::style::Overflow {
1272 fn from(value: Overflow) -> Self {
1273 match value {
1274 Overflow::Visible => Self::Visible,
1275 Overflow::Clip => Self::Clip,
1276 Overflow::Hidden => Self::Hidden,
1277 Overflow::Scroll => Self::Scroll,
1278 }
1279 }
1280}
1281
1282impl From<Position> for taffy::style::Position {
1283 fn from(value: Position) -> Self {
1284 match value {
1285 Position::Relative => Self::Relative,
1286 Position::Absolute => Self::Absolute,
1287 }
1288 }
1289}
1290
1291#[cfg(test)]
1292mod tests {
1293 use crate::{blue, green, px, red, yellow};
1294
1295 use super::*;
1296
1297 use util_macros::perf;
1298
1299 #[perf]
1300 fn test_basic_highlight_style_combination() {
1301 let style_a = HighlightStyle::default();
1302 let style_b = HighlightStyle::default();
1303 let style_a = style_a.highlight(style_b);
1304 assert_eq!(
1305 style_a,
1306 HighlightStyle::default(),
1307 "Combining empty styles should not produce a non-empty style."
1308 );
1309
1310 let mut style_b = HighlightStyle {
1311 color: Some(red()),
1312 strikethrough: Some(StrikethroughStyle {
1313 thickness: px(2.),
1314 color: Some(blue()),
1315 }),
1316 fade_out: Some(0.),
1317 font_style: Some(FontStyle::Italic),
1318 font_weight: Some(FontWeight(300.)),
1319 background_color: Some(yellow()),
1320 underline: Some(UnderlineStyle {
1321 thickness: px(2.),
1322 color: Some(red()),
1323 wavy: true,
1324 }),
1325 };
1326 let expected_style = style_b;
1327
1328 let style_a = style_a.highlight(style_b);
1329 assert_eq!(
1330 style_a, expected_style,
1331 "Blending an empty style with another style should return the other style"
1332 );
1333
1334 let style_b = style_b.highlight(Default::default());
1335 assert_eq!(
1336 style_b, expected_style,
1337 "Blending a style with an empty style should not change the style."
1338 );
1339
1340 let mut style_c = expected_style;
1341
1342 let style_d = HighlightStyle {
1343 color: Some(blue().alpha(0.7)),
1344 strikethrough: Some(StrikethroughStyle {
1345 thickness: px(4.),
1346 color: Some(crate::red()),
1347 }),
1348 fade_out: Some(0.),
1349 font_style: Some(FontStyle::Oblique),
1350 font_weight: Some(FontWeight(800.)),
1351 background_color: Some(green()),
1352 underline: Some(UnderlineStyle {
1353 thickness: px(4.),
1354 color: None,
1355 wavy: false,
1356 }),
1357 };
1358
1359 let expected_style = HighlightStyle {
1360 color: Some(red().blend(blue().alpha(0.7))),
1361 strikethrough: Some(StrikethroughStyle {
1362 thickness: px(4.),
1363 color: Some(red()),
1364 }),
1365 // TODO this does not seem right
1366 fade_out: Some(0.),
1367 font_style: Some(FontStyle::Oblique),
1368 font_weight: Some(FontWeight(800.)),
1369 background_color: Some(green()),
1370 underline: Some(UnderlineStyle {
1371 thickness: px(4.),
1372 color: None,
1373 wavy: false,
1374 }),
1375 };
1376
1377 let style_c = style_c.highlight(style_d);
1378 assert_eq!(
1379 style_c, expected_style,
1380 "Blending styles should blend properties where possible and override all others"
1381 );
1382 }
1383
1384 #[perf]
1385 fn test_combine_highlights() {
1386 assert_eq!(
1387 combine_highlights(
1388 [
1389 (0..5, green().into()),
1390 (4..10, FontWeight::BOLD.into()),
1391 (15..20, yellow().into()),
1392 ],
1393 [
1394 (2..6, FontStyle::Italic.into()),
1395 (1..3, blue().into()),
1396 (21..23, red().into()),
1397 ]
1398 )
1399 .collect::<Vec<_>>(),
1400 [
1401 (
1402 0..1,
1403 HighlightStyle {
1404 color: Some(green()),
1405 ..Default::default()
1406 }
1407 ),
1408 (
1409 1..2,
1410 HighlightStyle {
1411 color: Some(blue()),
1412 ..Default::default()
1413 }
1414 ),
1415 (
1416 2..3,
1417 HighlightStyle {
1418 color: Some(blue()),
1419 font_style: Some(FontStyle::Italic),
1420 ..Default::default()
1421 }
1422 ),
1423 (
1424 3..4,
1425 HighlightStyle {
1426 color: Some(green()),
1427 font_style: Some(FontStyle::Italic),
1428 ..Default::default()
1429 }
1430 ),
1431 (
1432 4..5,
1433 HighlightStyle {
1434 color: Some(green()),
1435 font_weight: Some(FontWeight::BOLD),
1436 font_style: Some(FontStyle::Italic),
1437 ..Default::default()
1438 }
1439 ),
1440 (
1441 5..6,
1442 HighlightStyle {
1443 font_weight: Some(FontWeight::BOLD),
1444 font_style: Some(FontStyle::Italic),
1445 ..Default::default()
1446 }
1447 ),
1448 (
1449 6..10,
1450 HighlightStyle {
1451 font_weight: Some(FontWeight::BOLD),
1452 ..Default::default()
1453 }
1454 ),
1455 (
1456 15..20,
1457 HighlightStyle {
1458 color: Some(yellow()),
1459 ..Default::default()
1460 }
1461 ),
1462 (
1463 21..23,
1464 HighlightStyle {
1465 color: Some(red()),
1466 ..Default::default()
1467 }
1468 )
1469 ]
1470 );
1471 }
1472}