markdown_renderer.rs

  1use crate::markdown_elements::{
  2    HeadingLevel, Link, MarkdownParagraph, MarkdownParagraphChunk, ParsedMarkdown,
  3    ParsedMarkdownBlockQuote, ParsedMarkdownCodeBlock, ParsedMarkdownElement,
  4    ParsedMarkdownHeading, ParsedMarkdownListItem, ParsedMarkdownListItemType, ParsedMarkdownTable,
  5    ParsedMarkdownTableAlignment, ParsedMarkdownTableRow,
  6};
  7use fs::normalize_path;
  8use gpui::{
  9    AbsoluteLength, AnyElement, App, AppContext as _, ClipboardItem, Context, DefiniteLength, Div,
 10    Element, ElementId, Entity, HighlightStyle, Hsla, ImageSource, InteractiveText, IntoElement,
 11    Keystroke, Length, Modifiers, ParentElement, Render, Resource, SharedString, Styled,
 12    StyledText, TextStyle, WeakEntity, Window, div, img, rems,
 13};
 14use settings::Settings;
 15use std::{
 16    ops::{Mul, Range},
 17    sync::Arc,
 18    vec,
 19};
 20use theme::{ActiveTheme, SyntaxTheme, ThemeSettings};
 21use ui::{
 22    ButtonCommon, Clickable, Color, FluentBuilder, IconButton, IconName, IconSize,
 23    InteractiveElement, Label, LabelCommon, LabelSize, LinkPreview, Pixels, Rems,
 24    StatefulInteractiveElement, StyledExt, StyledImage, ToggleState, Tooltip, VisibleOnHover,
 25    h_flex, relative, tooltip_container, v_flex,
 26};
 27use workspace::{OpenOptions, OpenVisible, Workspace};
 28
 29pub struct CheckboxClickedEvent {
 30    pub checked: bool,
 31    pub source_range: Range<usize>,
 32}
 33
 34impl CheckboxClickedEvent {
 35    pub fn source_range(&self) -> Range<usize> {
 36        self.source_range.clone()
 37    }
 38
 39    pub fn checked(&self) -> bool {
 40        self.checked
 41    }
 42}
 43
 44type CheckboxClickedCallback = Arc<Box<dyn Fn(&CheckboxClickedEvent, &mut Window, &mut App)>>;
 45
 46#[derive(Clone)]
 47pub struct RenderContext {
 48    workspace: Option<WeakEntity<Workspace>>,
 49    next_id: usize,
 50    buffer_font_family: SharedString,
 51    buffer_text_style: TextStyle,
 52    text_style: TextStyle,
 53    border_color: Hsla,
 54    text_color: Hsla,
 55    window_rem_size: Pixels,
 56    text_muted_color: Hsla,
 57    code_block_background_color: Hsla,
 58    code_span_background_color: Hsla,
 59    syntax_theme: Arc<SyntaxTheme>,
 60    indent: usize,
 61    checkbox_clicked_callback: Option<CheckboxClickedCallback>,
 62}
 63
 64impl RenderContext {
 65    pub fn new(
 66        workspace: Option<WeakEntity<Workspace>>,
 67        window: &mut Window,
 68        cx: &mut App,
 69    ) -> RenderContext {
 70        let theme = cx.theme().clone();
 71
 72        let settings = ThemeSettings::get_global(cx);
 73        let buffer_font_family = settings.buffer_font.family.clone();
 74        let mut buffer_text_style = window.text_style();
 75        buffer_text_style.font_family = buffer_font_family.clone();
 76        buffer_text_style.font_size = AbsoluteLength::from(settings.buffer_font_size(cx));
 77
 78        RenderContext {
 79            workspace,
 80            next_id: 0,
 81            indent: 0,
 82            buffer_font_family,
 83            buffer_text_style,
 84            text_style: window.text_style(),
 85            syntax_theme: theme.syntax().clone(),
 86            border_color: theme.colors().border,
 87            text_color: theme.colors().text,
 88            window_rem_size: window.rem_size(),
 89            text_muted_color: theme.colors().text_muted,
 90            code_block_background_color: theme.colors().surface_background,
 91            code_span_background_color: theme.colors().editor_document_highlight_read_background,
 92            checkbox_clicked_callback: None,
 93        }
 94    }
 95
 96    pub fn with_checkbox_clicked_callback(
 97        mut self,
 98        callback: impl Fn(&CheckboxClickedEvent, &mut Window, &mut App) + 'static,
 99    ) -> Self {
100        self.checkbox_clicked_callback = Some(Arc::new(Box::new(callback)));
101        self
102    }
103
104    fn next_id(&mut self, span: &Range<usize>) -> ElementId {
105        let id = format!("markdown-{}-{}-{}", self.next_id, span.start, span.end);
106        self.next_id += 1;
107        ElementId::from(SharedString::from(id))
108    }
109
110    /// HACK: used to have rems relative to buffer font size, so that things scale appropriately as
111    /// buffer font size changes. The callees of this function should be reimplemented to use real
112    /// relative sizing once that is implemented in GPUI
113    pub fn scaled_rems(&self, rems: f32) -> Rems {
114        self.buffer_text_style
115            .font_size
116            .to_rems(self.window_rem_size)
117            .mul(rems)
118    }
119
120    /// This ensures that children inside of block quotes
121    /// have padding between them.
122    ///
123    /// For example, for this markdown:
124    ///
125    /// ```markdown
126    /// > This is a block quote.
127    /// >
128    /// > And this is the next paragraph.
129    /// ```
130    ///
131    /// We give padding between "This is a block quote."
132    /// and "And this is the next paragraph."
133    fn with_common_p(&self, element: Div) -> Div {
134        if self.indent > 0 {
135            element.pb(self.scaled_rems(0.75))
136        } else {
137            element
138        }
139    }
140}
141
142pub fn render_parsed_markdown(
143    parsed: &ParsedMarkdown,
144    workspace: Option<WeakEntity<Workspace>>,
145    window: &mut Window,
146    cx: &mut App,
147) -> Div {
148    let mut cx = RenderContext::new(workspace, window, cx);
149
150    v_flex().gap_3().children(
151        parsed
152            .children
153            .iter()
154            .map(|block| render_markdown_block(block, &mut cx)),
155    )
156}
157pub fn render_markdown_block(block: &ParsedMarkdownElement, cx: &mut RenderContext) -> AnyElement {
158    use ParsedMarkdownElement::*;
159    match block {
160        Paragraph(text) => render_markdown_paragraph(text, cx),
161        Heading(heading) => render_markdown_heading(heading, cx),
162        ListItem(list_item) => render_markdown_list_item(list_item, cx),
163        Table(table) => render_markdown_table(table, cx),
164        BlockQuote(block_quote) => render_markdown_block_quote(block_quote, cx),
165        CodeBlock(code_block) => render_markdown_code_block(code_block, cx),
166        HorizontalRule(_) => render_markdown_rule(cx),
167    }
168}
169
170fn render_markdown_heading(parsed: &ParsedMarkdownHeading, cx: &mut RenderContext) -> AnyElement {
171    let size = match parsed.level {
172        HeadingLevel::H1 => 2.,
173        HeadingLevel::H2 => 1.5,
174        HeadingLevel::H3 => 1.25,
175        HeadingLevel::H4 => 1.,
176        HeadingLevel::H5 => 0.875,
177        HeadingLevel::H6 => 0.85,
178    };
179
180    let text_size = cx.scaled_rems(size);
181
182    // was `DefiniteLength::from(text_size.mul(1.25))`
183    // let line_height = DefiniteLength::from(text_size.mul(1.25));
184    let line_height = text_size * 1.25;
185
186    // was `rems(0.15)`
187    // let padding_top = cx.scaled_rems(0.15);
188    let padding_top = rems(0.15);
189
190    // was `.pb_1()` = `rems(0.25)`
191    // let padding_bottom = cx.scaled_rems(0.25);
192    let padding_bottom = rems(0.25);
193
194    let color = match parsed.level {
195        HeadingLevel::H6 => cx.text_muted_color,
196        _ => cx.text_color,
197    };
198    div()
199        .line_height(line_height)
200        .text_size(text_size)
201        .text_color(color)
202        .pt(padding_top)
203        .pb(padding_bottom)
204        .children(render_markdown_text(&parsed.contents, cx))
205        .whitespace_normal()
206        .into_any()
207}
208
209fn render_markdown_list_item(
210    parsed: &ParsedMarkdownListItem,
211    cx: &mut RenderContext,
212) -> AnyElement {
213    use ParsedMarkdownListItemType::*;
214
215    let padding = cx.scaled_rems((parsed.depth - 1) as f32);
216
217    let bullet = match &parsed.item_type {
218        Ordered(order) => format!("{}.", order).into_any_element(),
219        Unordered => "".into_any_element(),
220        Task(checked, range) => div()
221            .id(cx.next_id(range))
222            .mt(cx.scaled_rems(3.0 / 16.0))
223            .child(
224                MarkdownCheckbox::new(
225                    "checkbox",
226                    if *checked {
227                        ToggleState::Selected
228                    } else {
229                        ToggleState::Unselected
230                    },
231                    cx.clone(),
232                )
233                .when_some(
234                    cx.checkbox_clicked_callback.clone(),
235                    |this, callback| {
236                        this.on_click({
237                            let range = range.clone();
238                            move |selection, window, cx| {
239                                let checked = match selection {
240                                    ToggleState::Selected => true,
241                                    ToggleState::Unselected => false,
242                                    _ => return,
243                                };
244
245                                if window.modifiers().secondary() {
246                                    callback(
247                                        &CheckboxClickedEvent {
248                                            checked,
249                                            source_range: range.clone(),
250                                        },
251                                        window,
252                                        cx,
253                                    );
254                                }
255                            }
256                        })
257                    },
258                ),
259            )
260            .hover(|s| s.cursor_pointer())
261            .tooltip(|_, cx| {
262                InteractiveMarkdownElementTooltip::new(None, "toggle checkbox", cx).into()
263            })
264            .into_any_element(),
265    };
266    let bullet = div().mr(cx.scaled_rems(0.5)).child(bullet);
267
268    let contents: Vec<AnyElement> = parsed
269        .content
270        .iter()
271        .map(|c| render_markdown_block(c, cx))
272        .collect();
273
274    let item = h_flex()
275        .pl(DefiniteLength::Absolute(AbsoluteLength::Rems(padding)))
276        .items_start()
277        .children(vec![
278            bullet,
279            div().children(contents).pr(cx.scaled_rems(1.0)).w_full(),
280        ]);
281
282    cx.with_common_p(item).into_any()
283}
284
285/// # MarkdownCheckbox ///
286/// HACK: Copied from `ui/src/components/toggle.rs` to deal with scaling issues in markdown preview
287/// changes should be integrated into `Checkbox` in `toggle.rs` while making sure checkboxes elsewhere in the
288/// app are not visually affected
289#[derive(gpui::IntoElement)]
290struct MarkdownCheckbox {
291    id: ElementId,
292    toggle_state: ToggleState,
293    disabled: bool,
294    placeholder: bool,
295    on_click: Option<Box<dyn Fn(&ToggleState, &mut Window, &mut App) + 'static>>,
296    filled: bool,
297    style: ui::ToggleStyle,
298    tooltip: Option<Box<dyn Fn(&mut Window, &mut App) -> gpui::AnyView>>,
299    label: Option<SharedString>,
300    render_cx: RenderContext,
301}
302
303impl MarkdownCheckbox {
304    /// Creates a new [`Checkbox`].
305    fn new(id: impl Into<ElementId>, checked: ToggleState, render_cx: RenderContext) -> Self {
306        Self {
307            id: id.into(),
308            toggle_state: checked,
309            disabled: false,
310            on_click: None,
311            filled: false,
312            style: ui::ToggleStyle::default(),
313            tooltip: None,
314            label: None,
315            placeholder: false,
316            render_cx,
317        }
318    }
319
320    /// Binds a handler to the [`Checkbox`] that will be called when clicked.
321    fn on_click(mut self, handler: impl Fn(&ToggleState, &mut Window, &mut App) + 'static) -> Self {
322        self.on_click = Some(Box::new(handler));
323        self
324    }
325
326    fn bg_color(&self, cx: &App) -> Hsla {
327        let style = self.style.clone();
328        match (style, self.filled) {
329            (ui::ToggleStyle::Ghost, false) => cx.theme().colors().ghost_element_background,
330            (ui::ToggleStyle::Ghost, true) => cx.theme().colors().element_background,
331            (ui::ToggleStyle::ElevationBased(_), false) => gpui::transparent_black(),
332            (ui::ToggleStyle::ElevationBased(elevation), true) => elevation.darker_bg(cx),
333            (ui::ToggleStyle::Custom(_), false) => gpui::transparent_black(),
334            (ui::ToggleStyle::Custom(color), true) => color.opacity(0.2),
335        }
336    }
337
338    fn border_color(&self, cx: &App) -> Hsla {
339        if self.disabled {
340            return cx.theme().colors().border_variant;
341        }
342
343        match self.style.clone() {
344            ui::ToggleStyle::Ghost => cx.theme().colors().border,
345            ui::ToggleStyle::ElevationBased(_) => cx.theme().colors().border,
346            ui::ToggleStyle::Custom(color) => color.opacity(0.3),
347        }
348    }
349}
350
351impl gpui::RenderOnce for MarkdownCheckbox {
352    fn render(self, _: &mut Window, cx: &mut App) -> impl IntoElement {
353        let group_id = format!("checkbox_group_{:?}", self.id);
354        let color = if self.disabled {
355            Color::Disabled
356        } else {
357            Color::Selected
358        };
359        let icon_size_small = IconSize::Custom(self.render_cx.scaled_rems(14. / 16.)); // was IconSize::Small
360        let icon = match self.toggle_state {
361            ToggleState::Selected => {
362                if self.placeholder {
363                    None
364                } else {
365                    Some(
366                        ui::Icon::new(IconName::Check)
367                            .size(icon_size_small)
368                            .color(color),
369                    )
370                }
371            }
372            ToggleState::Indeterminate => Some(
373                ui::Icon::new(IconName::Dash)
374                    .size(icon_size_small)
375                    .color(color),
376            ),
377            ToggleState::Unselected => None,
378        };
379
380        let bg_color = self.bg_color(cx);
381        let border_color = self.border_color(cx);
382        let hover_border_color = border_color.alpha(0.7);
383
384        let size = self.render_cx.scaled_rems(1.25); // was Self::container_size(); (20px)
385
386        let checkbox = h_flex()
387            .id(self.id.clone())
388            .justify_center()
389            .items_center()
390            .size(size)
391            .group(group_id.clone())
392            .child(
393                div()
394                    .flex()
395                    .flex_none()
396                    .justify_center()
397                    .items_center()
398                    .m(self.render_cx.scaled_rems(0.25)) // was .m_1
399                    .size(self.render_cx.scaled_rems(1.0)) // was .size_4
400                    .rounded(self.render_cx.scaled_rems(0.125)) // was .rounded_xs
401                    .border_1()
402                    .bg(bg_color)
403                    .border_color(border_color)
404                    .when(self.disabled, |this| this.cursor_not_allowed())
405                    .when(self.disabled, |this| {
406                        this.bg(cx.theme().colors().element_disabled.opacity(0.6))
407                    })
408                    .when(!self.disabled, |this| {
409                        this.group_hover(group_id.clone(), |el| el.border_color(hover_border_color))
410                    })
411                    .when(self.placeholder, |this| {
412                        this.child(
413                            div()
414                                .flex_none()
415                                .rounded_full()
416                                .bg(color.color(cx).alpha(0.5))
417                                .size(self.render_cx.scaled_rems(0.25)), // was .size_1
418                        )
419                    })
420                    .children(icon),
421            );
422
423        h_flex()
424            .id(self.id)
425            .gap(ui::DynamicSpacing::Base06.rems(cx))
426            .child(checkbox)
427            .when_some(
428                self.on_click.filter(|_| !self.disabled),
429                |this, on_click| {
430                    this.on_click(move |_, window, cx| {
431                        on_click(&self.toggle_state.inverse(), window, cx)
432                    })
433                },
434            )
435            // TODO: Allow label size to be different from default.
436            // TODO: Allow label color to be different from muted.
437            .when_some(self.label, |this, label| {
438                this.child(Label::new(label).color(Color::Muted))
439            })
440            .when_some(self.tooltip, |this, tooltip| {
441                this.tooltip(move |window, cx| tooltip(window, cx))
442            })
443    }
444}
445
446fn paragraph_len(paragraphs: &MarkdownParagraph) -> usize {
447    paragraphs
448        .iter()
449        .map(|paragraph| match paragraph {
450            MarkdownParagraphChunk::Text(text) => text.contents.len(),
451            // TODO: Scale column width based on image size
452            MarkdownParagraphChunk::Image(_) => 1,
453        })
454        .sum()
455}
456
457fn render_markdown_table(parsed: &ParsedMarkdownTable, cx: &mut RenderContext) -> AnyElement {
458    let mut max_lengths: Vec<usize> = vec![0; parsed.header.children.len()];
459
460    for (index, cell) in parsed.header.children.iter().enumerate() {
461        let length = paragraph_len(cell);
462        max_lengths[index] = length;
463    }
464
465    for row in &parsed.body {
466        for (index, cell) in row.children.iter().enumerate() {
467            let length = paragraph_len(cell);
468
469            if length > max_lengths[index] {
470                max_lengths[index] = length;
471            }
472        }
473    }
474
475    let total_max_length: usize = max_lengths.iter().sum();
476    let max_column_widths: Vec<f32> = max_lengths
477        .iter()
478        .map(|&length| length as f32 / total_max_length as f32)
479        .collect();
480
481    let header = render_markdown_table_row(
482        &parsed.header,
483        &parsed.column_alignments,
484        &max_column_widths,
485        true,
486        cx,
487    );
488
489    let body: Vec<AnyElement> = parsed
490        .body
491        .iter()
492        .map(|row| {
493            render_markdown_table_row(
494                row,
495                &parsed.column_alignments,
496                &max_column_widths,
497                false,
498                cx,
499            )
500        })
501        .collect();
502
503    cx.with_common_p(v_flex())
504        .w_full()
505        .child(header)
506        .children(body)
507        .into_any()
508}
509
510fn render_markdown_table_row(
511    parsed: &ParsedMarkdownTableRow,
512    alignments: &Vec<ParsedMarkdownTableAlignment>,
513    max_column_widths: &Vec<f32>,
514    is_header: bool,
515    cx: &mut RenderContext,
516) -> AnyElement {
517    let mut items = vec![];
518
519    for (index, cell) in parsed.children.iter().enumerate() {
520        let alignment = alignments
521            .get(index)
522            .copied()
523            .unwrap_or(ParsedMarkdownTableAlignment::None);
524
525        let contents = render_markdown_text(cell, cx);
526
527        let container = match alignment {
528            ParsedMarkdownTableAlignment::Left | ParsedMarkdownTableAlignment::None => div(),
529            ParsedMarkdownTableAlignment::Center => v_flex().items_center(),
530            ParsedMarkdownTableAlignment::Right => v_flex().items_end(),
531        };
532
533        let max_width = max_column_widths.get(index).unwrap_or(&0.0);
534        let mut cell = container
535            .w(Length::Definite(relative(*max_width)))
536            .h_full()
537            .children(contents)
538            .px_2()
539            .py_1()
540            .border_color(cx.border_color);
541
542        if is_header {
543            cell = cell.border_2()
544        } else {
545            cell = cell.border_1()
546        }
547
548        items.push(cell);
549    }
550
551    h_flex().children(items).into_any_element()
552}
553
554fn render_markdown_block_quote(
555    parsed: &ParsedMarkdownBlockQuote,
556    cx: &mut RenderContext,
557) -> AnyElement {
558    cx.indent += 1;
559
560    let children: Vec<AnyElement> = parsed
561        .children
562        .iter()
563        .map(|child| render_markdown_block(child, cx))
564        .collect();
565
566    cx.indent -= 1;
567
568    cx.with_common_p(div())
569        .child(
570            div()
571                .border_l_4()
572                .border_color(cx.border_color)
573                .pl_3()
574                .children(children),
575        )
576        .into_any()
577}
578
579fn render_markdown_code_block(
580    parsed: &ParsedMarkdownCodeBlock,
581    cx: &mut RenderContext,
582) -> AnyElement {
583    let body = if let Some(highlights) = parsed.highlights.as_ref() {
584        StyledText::new(parsed.contents.clone()).with_default_highlights(
585            &cx.buffer_text_style,
586            highlights.iter().filter_map(|(range, highlight_id)| {
587                highlight_id
588                    .style(cx.syntax_theme.as_ref())
589                    .map(|style| (range.clone(), style))
590            }),
591        )
592    } else {
593        StyledText::new(parsed.contents.clone())
594    };
595
596    let copy_block_button = IconButton::new("copy-code", IconName::Copy)
597        .icon_size(IconSize::Small)
598        .on_click({
599            let contents = parsed.contents.clone();
600            move |_, _window, cx| {
601                cx.write_to_clipboard(ClipboardItem::new_string(contents.to_string()));
602            }
603        })
604        .tooltip(Tooltip::text("Copy code block"))
605        .visible_on_hover("markdown-block");
606
607    cx.with_common_p(div())
608        .font_family(cx.buffer_font_family.clone())
609        .px_3()
610        .py_3()
611        .bg(cx.code_block_background_color)
612        .rounded_sm()
613        .child(body)
614        .child(
615            div()
616                .h_flex()
617                .absolute()
618                .right_1()
619                .top_1()
620                .child(copy_block_button),
621        )
622        .into_any()
623}
624
625fn render_markdown_paragraph(parsed: &MarkdownParagraph, cx: &mut RenderContext) -> AnyElement {
626    cx.with_common_p(div())
627        .children(render_markdown_text(parsed, cx))
628        .flex()
629        .flex_col()
630        .into_any_element()
631}
632
633fn render_markdown_text(parsed_new: &MarkdownParagraph, cx: &mut RenderContext) -> Vec<AnyElement> {
634    let mut any_element = vec![];
635    // these values are cloned in-order satisfy borrow checker
636    let syntax_theme = cx.syntax_theme.clone();
637    let workspace_clone = cx.workspace.clone();
638    let code_span_bg_color = cx.code_span_background_color;
639    let text_style = cx.text_style.clone();
640
641    for parsed_region in parsed_new {
642        match parsed_region {
643            MarkdownParagraphChunk::Text(parsed) => {
644                let element_id = cx.next_id(&parsed.source_range);
645
646                let highlights = gpui::combine_highlights(
647                    parsed.highlights.iter().filter_map(|(range, highlight)| {
648                        highlight
649                            .to_highlight_style(&syntax_theme)
650                            .map(|style| (range.clone(), style))
651                    }),
652                    parsed.regions.iter().zip(&parsed.region_ranges).filter_map(
653                        |(region, range)| {
654                            if region.code {
655                                Some((
656                                    range.clone(),
657                                    HighlightStyle {
658                                        background_color: Some(code_span_bg_color),
659                                        ..Default::default()
660                                    },
661                                ))
662                            } else {
663                                None
664                            }
665                        },
666                    ),
667                );
668                let mut links = Vec::new();
669                let mut link_ranges = Vec::new();
670                for (range, region) in parsed.region_ranges.iter().zip(&parsed.regions) {
671                    if let Some(link) = region.link.clone() {
672                        links.push(link);
673                        link_ranges.push(range.clone());
674                    }
675                }
676                let workspace = workspace_clone.clone();
677                let element = div()
678                    .child(
679                        InteractiveText::new(
680                            element_id,
681                            StyledText::new(parsed.contents.clone())
682                                .with_default_highlights(&text_style, highlights),
683                        )
684                        .tooltip({
685                            let links = links.clone();
686                            let link_ranges = link_ranges.clone();
687                            move |idx, _, cx| {
688                                for (ix, range) in link_ranges.iter().enumerate() {
689                                    if range.contains(&idx) {
690                                        return Some(LinkPreview::new(&links[ix].to_string(), cx));
691                                    }
692                                }
693                                None
694                            }
695                        })
696                        .on_click(
697                            link_ranges,
698                            move |clicked_range_ix, window, cx| match &links[clicked_range_ix] {
699                                Link::Web { url } => cx.open_url(url),
700                                Link::Path { path, .. } => {
701                                    if let Some(workspace) = &workspace {
702                                        _ = workspace.update(cx, |workspace, cx| {
703                                            workspace
704                                                .open_abs_path(
705                                                    normalize_path(path.clone().as_path()),
706                                                    OpenOptions {
707                                                        visible: Some(OpenVisible::None),
708                                                        ..Default::default()
709                                                    },
710                                                    window,
711                                                    cx,
712                                                )
713                                                .detach();
714                                        });
715                                    }
716                                }
717                            },
718                        ),
719                    )
720                    .into_any();
721                any_element.push(element);
722            }
723
724            MarkdownParagraphChunk::Image(image) => {
725                let image_resource = match image.link.clone() {
726                    Link::Web { url } => Resource::Uri(url.into()),
727                    Link::Path { path, .. } => Resource::Path(Arc::from(path)),
728                };
729
730                let element_id = cx.next_id(&image.source_range);
731
732                let image_element = div()
733                    .id(element_id)
734                    .cursor_pointer()
735                    .child(
736                        img(ImageSource::Resource(image_resource))
737                            .max_w_full()
738                            .with_fallback({
739                                let alt_text = image.alt_text.clone();
740                                move || div().children(alt_text.clone()).into_any_element()
741                            }),
742                    )
743                    .tooltip({
744                        let link = image.link.clone();
745                        move |_, cx| {
746                            InteractiveMarkdownElementTooltip::new(
747                                Some(link.to_string()),
748                                "open image",
749                                cx,
750                            )
751                            .into()
752                        }
753                    })
754                    .on_click({
755                        let workspace = workspace_clone.clone();
756                        let link = image.link.clone();
757                        move |_, window, cx| {
758                            if window.modifiers().secondary() {
759                                match &link {
760                                    Link::Web { url } => cx.open_url(url),
761                                    Link::Path { path, .. } => {
762                                        if let Some(workspace) = &workspace {
763                                            _ = workspace.update(cx, |workspace, cx| {
764                                                workspace
765                                                    .open_abs_path(
766                                                        path.clone(),
767                                                        OpenOptions {
768                                                            visible: Some(OpenVisible::None),
769                                                            ..Default::default()
770                                                        },
771                                                        window,
772                                                        cx,
773                                                    )
774                                                    .detach();
775                                            });
776                                        }
777                                    }
778                                }
779                            }
780                        }
781                    })
782                    .into_any();
783                any_element.push(image_element);
784            }
785        }
786    }
787
788    any_element
789}
790
791fn render_markdown_rule(cx: &mut RenderContext) -> AnyElement {
792    let rule = div().w_full().h(cx.scaled_rems(0.125)).bg(cx.border_color);
793    div().py(cx.scaled_rems(0.5)).child(rule).into_any()
794}
795
796struct InteractiveMarkdownElementTooltip {
797    tooltip_text: Option<SharedString>,
798    action_text: String,
799}
800
801impl InteractiveMarkdownElementTooltip {
802    pub fn new(tooltip_text: Option<String>, action_text: &str, cx: &mut App) -> Entity<Self> {
803        let tooltip_text = tooltip_text.map(|t| util::truncate_and_trailoff(&t, 50).into());
804
805        cx.new(|_cx| Self {
806            tooltip_text,
807            action_text: action_text.to_string(),
808        })
809    }
810}
811
812impl Render for InteractiveMarkdownElementTooltip {
813    fn render(&mut self, window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
814        tooltip_container(window, cx, |el, _, _| {
815            let secondary_modifier = Keystroke {
816                modifiers: Modifiers::secondary_key(),
817                ..Default::default()
818            };
819
820            el.child(
821                v_flex()
822                    .gap_1()
823                    .when_some(self.tooltip_text.clone(), |this, text| {
824                        this.child(Label::new(text).size(LabelSize::Small))
825                    })
826                    .child(
827                        Label::new(format!(
828                            "{}-click to {}",
829                            secondary_modifier, self.action_text
830                        ))
831                        .size(LabelSize::Small)
832                        .color(Color::Muted),
833                    ),
834            )
835        })
836    }
837}