freya_core/elements/
paragraph.rs

1//! [paragraph()] makes it possible to render rich text with different styles. Its a more customizable API than [crate::elements::label].
2
3use std::{
4    any::Any,
5    borrow::Cow,
6    cell::RefCell,
7    fmt::{
8        Debug,
9        Display,
10    },
11    rc::Rc,
12};
13
14use freya_engine::prelude::{
15    FontStyle,
16    Paint,
17    PaintStyle,
18    ParagraphBuilder,
19    ParagraphStyle,
20    RectHeightStyle,
21    RectWidthStyle,
22    SkParagraph,
23    SkRect,
24    TextStyle,
25};
26use rustc_hash::FxHashMap;
27use torin::prelude::Size2D;
28
29use crate::{
30    data::{
31        AccessibilityData,
32        CursorStyleData,
33        EffectData,
34        LayoutData,
35        StyleState,
36        TextStyleData,
37        TextStyleState,
38    },
39    diff_key::DiffKey,
40    element::{
41        Element,
42        ElementExt,
43        EventHandlerType,
44        LayoutContext,
45        RenderContext,
46    },
47    events::name::EventName,
48    layers::Layer,
49    prelude::{
50        AccessibilityExt,
51        Color,
52        ContainerExt,
53        EventHandlersExt,
54        KeyExt,
55        LayerExt,
56        LayoutExt,
57        MaybeExt,
58        TextAlign,
59        TextStyleExt,
60        VerticalAlign,
61    },
62    style::cursor::{
63        CursorMode,
64        CursorStyle,
65    },
66    text_cache::CachedParagraph,
67    tree::DiffModifies,
68};
69
70/// [paragraph()] makes it possible to render rich text with different styles. Its a more customizable API than [crate::elements::label].
71///
72/// See the available methods in [Paragraph].
73///
74/// ```rust
75/// # use freya::prelude::*;
76/// fn app() -> impl IntoElement {
77///     paragraph()
78///         .span(Span::new("Hello").font_size(24.0))
79///         .span(Span::new("World").font_size(16.0))
80/// }
81/// ```
82pub fn paragraph() -> Paragraph {
83    Paragraph {
84        key: DiffKey::None,
85        element: ParagraphElement::default(),
86    }
87}
88
89pub struct ParagraphHolderInner {
90    pub paragraph: Rc<SkParagraph>,
91    pub scale_factor: f64,
92}
93
94#[derive(Clone)]
95pub struct ParagraphHolder(pub Rc<RefCell<Option<ParagraphHolderInner>>>);
96
97impl PartialEq for ParagraphHolder {
98    fn eq(&self, other: &Self) -> bool {
99        Rc::ptr_eq(&self.0, &other.0)
100    }
101}
102
103impl Debug for ParagraphHolder {
104    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
105        f.write_str("ParagraphHolder")
106    }
107}
108
109impl Default for ParagraphHolder {
110    fn default() -> Self {
111        Self(Rc::new(RefCell::new(None)))
112    }
113}
114
115#[derive(PartialEq, Clone)]
116pub struct ParagraphElement {
117    pub layout: LayoutData,
118    pub spans: Vec<Span<'static>>,
119    pub accessibility: AccessibilityData,
120    pub text_style_data: TextStyleData,
121    pub cursor_style_data: CursorStyleData,
122    pub event_handlers: FxHashMap<EventName, EventHandlerType>,
123    pub sk_paragraph: ParagraphHolder,
124    pub cursor_index: Option<usize>,
125    pub highlights: Vec<(usize, usize)>,
126    pub max_lines: Option<usize>,
127    pub line_height: Option<f32>,
128    pub relative_layer: Layer,
129    pub cursor_style: CursorStyle,
130    pub cursor_mode: CursorMode,
131    pub vertical_align: VerticalAlign,
132}
133
134impl Default for ParagraphElement {
135    fn default() -> Self {
136        let mut accessibility = AccessibilityData::default();
137        accessibility.builder.set_role(accesskit::Role::Paragraph);
138        Self {
139            layout: Default::default(),
140            spans: Default::default(),
141            accessibility,
142            text_style_data: Default::default(),
143            cursor_style_data: Default::default(),
144            event_handlers: Default::default(),
145            sk_paragraph: Default::default(),
146            cursor_index: Default::default(),
147            highlights: Default::default(),
148            max_lines: Default::default(),
149            line_height: Default::default(),
150            relative_layer: Default::default(),
151            cursor_style: CursorStyle::default(),
152            cursor_mode: CursorMode::default(),
153            vertical_align: VerticalAlign::default(),
154        }
155    }
156}
157
158impl Display for ParagraphElement {
159    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
160        f.write_str(
161            &self
162                .spans
163                .iter()
164                .map(|s| s.text.clone())
165                .collect::<Vec<_>>()
166                .join("\n"),
167        )
168    }
169}
170
171impl ElementExt for ParagraphElement {
172    fn changed(&self, other: &Rc<dyn ElementExt>) -> bool {
173        let Some(paragraph) = (other.as_ref() as &dyn Any).downcast_ref::<ParagraphElement>()
174        else {
175            return false;
176        };
177        self != paragraph
178    }
179
180    fn diff(&self, other: &Rc<dyn ElementExt>) -> DiffModifies {
181        let Some(paragraph) = (other.as_ref() as &dyn Any).downcast_ref::<ParagraphElement>()
182        else {
183            return DiffModifies::all();
184        };
185
186        let mut diff = DiffModifies::empty();
187
188        if self.spans != paragraph.spans {
189            diff.insert(DiffModifies::STYLE);
190            diff.insert(DiffModifies::LAYOUT);
191        }
192
193        if self.accessibility != paragraph.accessibility {
194            diff.insert(DiffModifies::ACCESSIBILITY);
195        }
196
197        if self.relative_layer != paragraph.relative_layer {
198            diff.insert(DiffModifies::LAYER);
199        }
200
201        if self.text_style_data != paragraph.text_style_data {
202            diff.insert(DiffModifies::STYLE);
203        }
204
205        if self.event_handlers != paragraph.event_handlers {
206            diff.insert(DiffModifies::EVENT_HANDLERS);
207        }
208
209        if self.cursor_index != paragraph.cursor_index
210            || self.highlights != paragraph.highlights
211            || self.cursor_mode != paragraph.cursor_mode
212            || self.vertical_align != paragraph.vertical_align
213        {
214            diff.insert(DiffModifies::STYLE);
215        }
216
217        if self.text_style_data != paragraph.text_style_data
218            || self.line_height != paragraph.line_height
219            || self.max_lines != paragraph.max_lines
220        {
221            diff.insert(DiffModifies::TEXT_STYLE);
222            diff.insert(DiffModifies::LAYOUT);
223        }
224
225        if self.layout != paragraph.layout {
226            diff.insert(DiffModifies::STYLE);
227            diff.insert(DiffModifies::LAYOUT);
228        }
229
230        diff
231    }
232
233    fn layout(&'_ self) -> Cow<'_, LayoutData> {
234        Cow::Borrowed(&self.layout)
235    }
236    fn effect(&'_ self) -> Option<Cow<'_, EffectData>> {
237        None
238    }
239
240    fn style(&'_ self) -> Cow<'_, StyleState> {
241        Cow::Owned(StyleState::default())
242    }
243
244    fn text_style(&'_ self) -> Cow<'_, TextStyleData> {
245        Cow::Borrowed(&self.text_style_data)
246    }
247
248    fn accessibility(&'_ self) -> Cow<'_, AccessibilityData> {
249        Cow::Borrowed(&self.accessibility)
250    }
251
252    fn layer(&self) -> Layer {
253        self.relative_layer
254    }
255
256    fn measure(&self, context: LayoutContext) -> Option<(Size2D, Rc<dyn Any>)> {
257        let cached_paragraph = CachedParagraph {
258            text_style_state: context.text_style_state,
259            spans: &self.spans,
260            max_lines: self.max_lines,
261            line_height: self.line_height,
262            width: context.area_size.width,
263        };
264        let paragraph = context
265            .text_cache
266            .utilize(context.node_id, &cached_paragraph)
267            .unwrap_or_else(|| {
268                let mut paragraph_style = ParagraphStyle::default();
269                let mut text_style = TextStyle::default();
270
271                let mut font_families = context.text_style_state.font_families.clone();
272                font_families.extend_from_slice(context.fallback_fonts);
273
274                text_style.set_color(context.text_style_state.color);
275                text_style.set_font_size(
276                    f32::from(context.text_style_state.font_size) * context.scale_factor as f32,
277                );
278                text_style.set_font_families(&font_families);
279                text_style.set_font_style(FontStyle::new(
280                    context.text_style_state.font_weight.into(),
281                    context.text_style_state.font_width.into(),
282                    context.text_style_state.font_slant.into(),
283                ));
284
285                if context.text_style_state.text_height.needs_custom_height() {
286                    text_style.set_height_override(true);
287                    text_style.set_half_leading(true);
288                }
289
290                if let Some(line_height) = self.line_height {
291                    text_style.set_height_override(true);
292                    text_style.set_height(line_height);
293                }
294
295                for text_shadow in context.text_style_state.text_shadows.iter() {
296                    text_style.add_shadow((*text_shadow).into());
297                }
298
299                if let Some(ellipsis) = context.text_style_state.text_overflow.get_ellipsis() {
300                    paragraph_style.set_ellipsis(ellipsis);
301                }
302
303                paragraph_style.set_text_style(&text_style);
304                paragraph_style.set_max_lines(self.max_lines);
305                paragraph_style.set_text_align(context.text_style_state.text_align.into());
306
307                let mut paragraph_builder =
308                    ParagraphBuilder::new(&paragraph_style, &*context.font_collection);
309
310                for span in &self.spans {
311                    let text_style_state =
312                        TextStyleState::from_data(context.text_style_state, &span.text_style_data);
313                    let mut text_style = TextStyle::new();
314                    let mut font_families = context.text_style_state.font_families.clone();
315                    font_families.extend_from_slice(context.fallback_fonts);
316
317                    for text_shadow in text_style_state.text_shadows.iter() {
318                        text_style.add_shadow((*text_shadow).into());
319                    }
320
321                    text_style.set_color(text_style_state.color);
322                    text_style.set_font_size(
323                        f32::from(text_style_state.font_size) * context.scale_factor as f32,
324                    );
325                    text_style.set_font_families(&font_families);
326                    text_style.set_font_style(FontStyle::new(
327                        text_style_state.font_weight.into(),
328                        text_style_state.font_width.into(),
329                        text_style_state.font_slant.into(),
330                    ));
331                    text_style.set_decoration_type(text_style_state.text_decoration.into());
332                    if let Some(line_height) = self.line_height {
333                        text_style.set_height_override(true);
334                        text_style.set_height(line_height);
335                    }
336                    paragraph_builder.push_style(&text_style);
337                    paragraph_builder.add_text(&span.text);
338                }
339
340                let mut paragraph = paragraph_builder.build();
341                paragraph.layout(
342                    if self.max_lines == Some(1)
343                        && context.text_style_state.text_align == TextAlign::default()
344                        && !paragraph_style.ellipsized()
345                    {
346                        f32::MAX
347                    } else {
348                        context.area_size.width + 1.0
349                    },
350                );
351                context
352                    .text_cache
353                    .insert(context.node_id, &cached_paragraph, paragraph)
354            });
355
356        let size = Size2D::new(paragraph.longest_line(), paragraph.height());
357
358        self.sk_paragraph
359            .0
360            .borrow_mut()
361            .replace(ParagraphHolderInner {
362                paragraph,
363                scale_factor: context.scale_factor,
364            });
365
366        Some((size, Rc::new(())))
367    }
368
369    fn should_hook_measurement(&self) -> bool {
370        true
371    }
372
373    fn should_measure_inner_children(&self) -> bool {
374        false
375    }
376
377    fn events_handlers(&'_ self) -> Option<Cow<'_, FxHashMap<EventName, EventHandlerType>>> {
378        Some(Cow::Borrowed(&self.event_handlers))
379    }
380
381    fn render(&self, context: RenderContext) {
382        let paragraph = self.sk_paragraph.0.borrow();
383        let ParagraphHolderInner { paragraph, .. } = paragraph.as_ref().unwrap();
384        let visible_area = context.layout_node.visible_area();
385
386        let cursor_area = match self.cursor_mode {
387            CursorMode::Fit => visible_area,
388            CursorMode::Expanded => context.layout_node.area,
389        };
390
391        let paragraph_height = paragraph.height();
392        let area_height = visible_area.height();
393        let vertical_offset = match self.vertical_align {
394            VerticalAlign::Start => 0.0,
395            VerticalAlign::Center => (area_height - paragraph_height).max(0.0) / 2.0,
396        };
397
398        let cursor_vertical_offset = match self.cursor_mode {
399            CursorMode::Fit => vertical_offset,
400            CursorMode::Expanded => 0.0,
401        };
402        let cursor_vertical_size_offset = match self.cursor_mode {
403            CursorMode::Fit => 0.,
404            CursorMode::Expanded => vertical_offset * 2.,
405        };
406
407        // Draw highlights
408        for (from, to) in self.highlights.iter() {
409            if from == to {
410                continue;
411            }
412            let (from, to) = { if from < to { (from, to) } else { (to, from) } };
413            let rects = paragraph.get_rects_for_range(
414                *from..*to,
415                RectHeightStyle::Tight,
416                RectWidthStyle::Tight,
417            );
418
419            let mut highlights_paint = Paint::default();
420            highlights_paint.set_anti_alias(true);
421            highlights_paint.set_style(PaintStyle::Fill);
422            highlights_paint.set_color(self.cursor_style_data.highlight_color);
423
424            if rects.is_empty() && *from == 0 {
425                let avg_line_height =
426                    paragraph.height() / paragraph.get_line_metrics().len().max(1) as f32;
427                let rect = SkRect::new(
428                    cursor_area.min_x(),
429                    cursor_area.min_y() + cursor_vertical_offset,
430                    cursor_area.min_x() + 6.,
431                    cursor_area.min_y() + avg_line_height + cursor_vertical_size_offset,
432                );
433
434                context.canvas.draw_rect(rect, &highlights_paint);
435            }
436
437            for rect in rects {
438                let rect = SkRect::new(
439                    cursor_area.min_x() + rect.rect.left,
440                    cursor_area.min_y() + rect.rect.top + cursor_vertical_offset,
441                    cursor_area.min_x() + rect.rect.right.max(6.),
442                    cursor_area.min_y() + rect.rect.bottom + cursor_vertical_size_offset,
443                );
444                context.canvas.draw_rect(rect, &highlights_paint);
445            }
446        }
447
448        // We exclude those highlights that on the same start and end (e.g the user just started dragging)
449        let visible_highlights = self
450            .highlights
451            .iter()
452            .filter(|highlight| highlight.0 != highlight.1)
453            .count()
454            > 0;
455
456        // Draw block cursor behind text if needed
457        if let Some(cursor_index) = self.cursor_index
458            && self.cursor_style == CursorStyle::Block
459            && let Some(cursor_rect) = paragraph
460                .get_rects_for_range(
461                    cursor_index..cursor_index + 1,
462                    RectHeightStyle::Tight,
463                    RectWidthStyle::Tight,
464                )
465                .first()
466                .map(|text| text.rect)
467                .or_else(|| {
468                    // Show the cursor at the end of the text if possible
469                    let text_len = paragraph
470                        .get_glyph_position_at_coordinate((f32::MAX, f32::MAX))
471                        .position as usize;
472                    let last_rects = paragraph.get_rects_for_range(
473                        text_len.saturating_sub(1)..text_len,
474                        RectHeightStyle::Tight,
475                        RectWidthStyle::Tight,
476                    );
477
478                    if let Some(last_rect) = last_rects.first() {
479                        let mut caret = last_rect.rect;
480                        caret.left = caret.right;
481                        Some(caret)
482                    } else {
483                        let avg_line_height =
484                            paragraph.height() / paragraph.get_line_metrics().len().max(1) as f32;
485                        Some(SkRect::new(0., 0., 6., avg_line_height))
486                    }
487                })
488        {
489            let width = (cursor_rect.right - cursor_rect.left).max(6.0);
490            let cursor_rect = SkRect::new(
491                cursor_area.min_x() + cursor_rect.left,
492                cursor_area.min_y() + cursor_rect.top + cursor_vertical_offset,
493                cursor_area.min_x() + cursor_rect.left + width,
494                cursor_area.min_y() + cursor_rect.bottom + cursor_vertical_size_offset,
495            );
496
497            let mut paint = Paint::default();
498            paint.set_anti_alias(true);
499            paint.set_style(PaintStyle::Fill);
500            paint.set_color(self.cursor_style_data.color);
501
502            context.canvas.draw_rect(cursor_rect, &paint);
503        }
504
505        // Draw text (always uses visible_area with vertical_offset)
506        paragraph.paint(
507            context.canvas,
508            (visible_area.min_x(), visible_area.min_y() + vertical_offset),
509        );
510
511        // Draw cursor
512        if let Some(cursor_index) = self.cursor_index
513            && !visible_highlights
514        {
515            let cursor_rects = paragraph.get_rects_for_range(
516                cursor_index..cursor_index + 1,
517                RectHeightStyle::Tight,
518                RectWidthStyle::Tight,
519            );
520            if let Some(cursor_rect) = cursor_rects.first().map(|text| text.rect).or_else(|| {
521                // Show the cursor at the end of the text if possible
522                let text_len = paragraph
523                    .get_glyph_position_at_coordinate((f32::MAX, f32::MAX))
524                    .position as usize;
525                let last_rects = paragraph.get_rects_for_range(
526                    text_len.saturating_sub(1)..text_len,
527                    RectHeightStyle::Tight,
528                    RectWidthStyle::Tight,
529                );
530
531                if let Some(last_rect) = last_rects.first() {
532                    let mut caret = last_rect.rect;
533                    caret.left = caret.right;
534                    Some(caret)
535                } else {
536                    None
537                }
538            }) {
539                let paint_color = self.cursor_style_data.color;
540                match self.cursor_style {
541                    CursorStyle::Underline => {
542                        let thickness = 2.0;
543                        let underline_rect = SkRect::new(
544                            cursor_area.min_x() + cursor_rect.left,
545                            cursor_area.min_y() + cursor_rect.bottom - thickness
546                                + cursor_vertical_offset,
547                            cursor_area.min_x() + cursor_rect.right,
548                            cursor_area.min_y() + cursor_rect.bottom + cursor_vertical_size_offset,
549                        );
550
551                        let mut paint = Paint::default();
552                        paint.set_anti_alias(true);
553                        paint.set_style(PaintStyle::Fill);
554                        paint.set_color(paint_color);
555
556                        context.canvas.draw_rect(underline_rect, &paint);
557                    }
558                    CursorStyle::Line => {
559                        let cursor_rect = SkRect::new(
560                            cursor_area.min_x() + cursor_rect.left,
561                            cursor_area.min_y() + cursor_rect.top + cursor_vertical_offset,
562                            cursor_area.min_x() + cursor_rect.left + 2.,
563                            cursor_area.min_y() + cursor_rect.bottom + cursor_vertical_size_offset,
564                        );
565
566                        let mut paint = Paint::default();
567                        paint.set_anti_alias(true);
568                        paint.set_style(PaintStyle::Fill);
569                        paint.set_color(paint_color);
570
571                        context.canvas.draw_rect(cursor_rect, &paint);
572                    }
573                    _ => {}
574                }
575            }
576        }
577    }
578}
579
580impl From<Paragraph> for Element {
581    fn from(value: Paragraph) -> Self {
582        Element::Element {
583            key: value.key,
584            element: Rc::new(value.element),
585            elements: vec![],
586        }
587    }
588}
589
590impl KeyExt for Paragraph {
591    fn write_key(&mut self) -> &mut DiffKey {
592        &mut self.key
593    }
594}
595
596impl EventHandlersExt for Paragraph {
597    fn get_event_handlers(&mut self) -> &mut FxHashMap<EventName, EventHandlerType> {
598        &mut self.element.event_handlers
599    }
600}
601
602impl MaybeExt for Paragraph {}
603
604impl LayerExt for Paragraph {
605    fn get_layer(&mut self) -> &mut Layer {
606        &mut self.element.relative_layer
607    }
608}
609
610pub struct Paragraph {
611    key: DiffKey,
612    element: ParagraphElement,
613}
614
615impl LayoutExt for Paragraph {
616    fn get_layout(&mut self) -> &mut LayoutData {
617        &mut self.element.layout
618    }
619}
620
621impl ContainerExt for Paragraph {}
622
623impl AccessibilityExt for Paragraph {
624    fn get_accessibility_data(&mut self) -> &mut AccessibilityData {
625        &mut self.element.accessibility
626    }
627}
628
629impl TextStyleExt for Paragraph {
630    fn get_text_style_data(&mut self) -> &mut TextStyleData {
631        &mut self.element.text_style_data
632    }
633}
634
635impl Paragraph {
636    pub fn try_downcast(element: &dyn ElementExt) -> Option<ParagraphElement> {
637        (element as &dyn Any)
638            .downcast_ref::<ParagraphElement>()
639            .cloned()
640    }
641
642    pub fn spans_iter(mut self, spans: impl Iterator<Item = Span<'static>>) -> Self {
643        let spans = spans.collect::<Vec<Span>>();
644        // TODO: Accessible paragraphs
645        // self.element.accessibility.builder.set_value(text.clone());
646        self.element.spans.extend(spans);
647        self
648    }
649
650    pub fn span(mut self, span: impl Into<Span<'static>>) -> Self {
651        let span = span.into();
652        // TODO: Accessible paragraphs
653        // self.element.accessibility.builder.set_value(text.clone());
654        self.element.spans.push(span);
655        self
656    }
657
658    pub fn cursor_color(mut self, cursor_color: impl Into<Color>) -> Self {
659        self.element.cursor_style_data.color = cursor_color.into();
660        self
661    }
662
663    pub fn highlight_color(mut self, highlight_color: impl Into<Color>) -> Self {
664        self.element.cursor_style_data.highlight_color = highlight_color.into();
665        self
666    }
667
668    pub fn cursor_style(mut self, cursor_style: impl Into<CursorStyle>) -> Self {
669        self.element.cursor_style = cursor_style.into();
670        self
671    }
672
673    pub fn holder(mut self, holder: ParagraphHolder) -> Self {
674        self.element.sk_paragraph = holder;
675        self
676    }
677
678    pub fn cursor_index(mut self, cursor_index: impl Into<Option<usize>>) -> Self {
679        self.element.cursor_index = cursor_index.into();
680        self
681    }
682
683    pub fn highlights(mut self, highlights: impl Into<Option<Vec<(usize, usize)>>>) -> Self {
684        if let Some(highlights) = highlights.into() {
685            self.element.highlights = highlights;
686        }
687        self
688    }
689
690    pub fn max_lines(mut self, max_lines: impl Into<Option<usize>>) -> Self {
691        self.element.max_lines = max_lines.into();
692        self
693    }
694
695    pub fn line_height(mut self, line_height: impl Into<Option<f32>>) -> Self {
696        self.element.line_height = line_height.into();
697        self
698    }
699
700    /// Set the cursor mode for the paragraph.
701    /// - `CursorMode::Fit`: cursor/highlights use the paragraph's visible_area. VerticalAlign affects cursor positions.
702    /// - `CursorMode::Expanded`: cursor/highlights use the paragraph's inner_area. VerticalAlign does NOT affect cursor positions.
703    pub fn cursor_mode(mut self, cursor_mode: impl Into<CursorMode>) -> Self {
704        self.element.cursor_mode = cursor_mode.into();
705        self
706    }
707
708    /// Set the vertical alignment for the paragraph text.
709    /// This affects how the text is rendered within the paragraph area, but cursor/highlight behavior
710    /// depends on the `cursor_mode` setting.
711    pub fn vertical_align(mut self, vertical_align: impl Into<VerticalAlign>) -> Self {
712        self.element.vertical_align = vertical_align.into();
713        self
714    }
715}
716
717#[derive(Clone, PartialEq, Hash)]
718pub struct Span<'a> {
719    pub text_style_data: TextStyleData,
720    pub text: Cow<'a, str>,
721}
722
723impl From<&'static str> for Span<'static> {
724    fn from(text: &'static str) -> Self {
725        Span {
726            text_style_data: TextStyleData::default(),
727            text: text.into(),
728        }
729    }
730}
731
732impl From<String> for Span<'static> {
733    fn from(text: String) -> Self {
734        Span {
735            text_style_data: TextStyleData::default(),
736            text: text.into(),
737        }
738    }
739}
740
741impl<'a> Span<'a> {
742    pub fn new(text: impl Into<Cow<'a, str>>) -> Self {
743        Self {
744            text: text.into(),
745            text_style_data: TextStyleData::default(),
746        }
747    }
748}
749
750impl<'a> TextStyleExt for Span<'a> {
751    fn get_text_style_data(&mut self) -> &mut TextStyleData {
752        &mut self.text_style_data
753    }
754}
freya_core/elements/paragraph.rs

freya_core/elements/
paragraph.rs
