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markdown: Allow code blocks and tables to be horizontally scrollable (#25956)

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This PR adds the ability for Markdown code blocks and tables to be made
horizontally scrollable.

This is a feature that the caller can opt in to.

Right now we're using it for the rendered Markdown in the Assistant 2
panel.

Release Notes:

- N/A
This commit is contained in:
Marshall Bowers 2025-03-03 17:52:59 -05:00 • committed by GitHub
parent 7321c814ce
commit 0776fa8f31
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GPG key ID: B5690EEEBB952194
4 changed files with 22 additions and 5 deletions
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22
crates/markdown/src/markdown.rs
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@ -27,6 +27,7 @@ use crate::parser::CodeBlockKind;
pub struct MarkdownStyle {
pub base_text_style: TextStyle,
pub code_block: StyleRefinement,
pub code_block_overflow_x_scroll: bool,
pub inline_code: TextStyleRefinement,
pub block_quote: TextStyleRefinement,
pub link: TextStyleRefinement,
@ -35,6 +36,7 @@ pub struct MarkdownStyle {
pub syntax: Arc<SyntaxTheme>,
pub selection_background_color: Hsla,
pub heading: StyleRefinement,
pub table_overflow_x_scroll: bool,
}
impl Default for MarkdownStyle {
@ -42,6 +44,7 @@ impl Default for MarkdownStyle {
Self {
base_text_style: Default::default(),
code_block: Default::default(),
code_block_overflow_x_scroll: false,
inline_code: Default::default(),
block_quote: Default::default(),
link: Default::default(),
@ -50,6 +53,7 @@ impl Default for MarkdownStyle {
syntax: Arc::new(SyntaxTheme::default()),
selection_background_color: Default::default(),
heading: Default::default(),
table_overflow_x_scroll: false,
}
}
}
@ -604,13 +608,20 @@ impl Element for MarkdownElement {
None
};
let mut d = div().w_full().rounded_lg();
d.style().refine(&self.style.code_block);
let mut code_block = div()
.id(("code-block", range.start))
.flex()
.rounded_lg()
.when(self.style.code_block_overflow_x_scroll, |mut code_block| {
code_block.style().restrict_scroll_to_axis = Some(true);
code_block.overflow_x_scroll()
});
code_block.style().refine(&self.style.code_block);
if let Some(code_block_text_style) = &self.style.code_block.text {
builder.push_text_style(code_block_text_style.to_owned());
}
builder.push_code_block(language);
builder.push_div(d, range, markdown_end);
builder.push_div(code_block, range, markdown_end);
}
MarkdownTag::HtmlBlock => builder.push_div(div(), range, markdown_end),
MarkdownTag::List(bullet_index) => {
@ -670,7 +681,10 @@ impl Element for MarkdownElement {
.border_1()
.border_color(cx.theme().colors().border)
.rounded_md()
.overflow_x_scroll(),
.when(self.style.table_overflow_x_scroll, |mut table| {
table.style().restrict_scroll_to_axis = Some(true);
table.overflow_x_scroll()
}),
range,
markdown_end,
);