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Add rich_text2

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This commit is contained in:
Conrad Irwin 2023-11-02 19:19:18 -06:00
parent cbd902658c
commit 6ecb4805f7
3 changed files with 381 additions and 2 deletions
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2
Cargo.lock generated
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@ -1546,7 +1546,7 @@ dependencies = [
"sum_tree", "sum_tree",
"sysinfo", "sysinfo",
"tempfile", "tempfile",
"text", "text2",
"thiserror", "thiserror",
"time", "time",
"tiny_http", "tiny_http",

2
crates/multi_buffer2/Cargo.toml
View file

@ -27,7 +27,7 @@ git = { package = "git3", path = "../git3" }
gpui = { package = "gpui2", path = "../gpui2" } gpui = { package = "gpui2", path = "../gpui2" }
language = { package = "language2", path = "../language2" } language = { package = "language2", path = "../language2" }
lsp = { package = "lsp2", path = "../lsp2" } lsp = { package = "lsp2", path = "../lsp2" }
rich_text = { path = "../rich_text" } rich_text = { package = "rich_text2", path = "../rich_text2" }
settings = { package = "settings2", path = "../settings2" } settings = { package = "settings2", path = "../settings2" }
snippet = { path = "../snippet" } snippet = { path = "../snippet" }
sum_tree = { path = "../sum_tree" } sum_tree = { path = "../sum_tree" }

379
crates/rich_text2/src/rich_text.rs Normal file
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@ -0,0 +1,379 @@
use std::{ops::Range, sync::Arc};
use anyhow::bail;
use futures::FutureExt;
use gpui::{
elements::Text,
fonts::{HighlightStyle, Underline, Weight},
platform::{CursorStyle, MouseButton},
AnyElement, CursorRegion, Element, MouseRegion, ViewContext,
};
use language::{HighlightId, Language, LanguageRegistry};
use theme::{RichTextStyle, SyntaxTheme};
use util::RangeExt;
#[derive(Debug, Clone, PartialEq, Eq)]
pub enum Highlight {
Id(HighlightId),
Highlight(HighlightStyle),
Mention,
SelfMention,
}
impl From<HighlightStyle> for Highlight {
fn from(style: HighlightStyle) -> Self {
Self::Highlight(style)
}
}
impl From<HighlightId> for Highlight {
fn from(style: HighlightId) -> Self {
Self::Id(style)
}
}
#[derive(Debug, Clone)]
pub struct RichText {
pub text: String,
pub highlights: Vec<(Range<usize>, Highlight)>,
pub region_ranges: Vec<Range<usize>>,
pub regions: Vec<RenderedRegion>,
}
#[derive(Clone, Copy, Debug, PartialEq, Eq)]
pub enum BackgroundKind {
Code,
/// A mention background for non-self user.
Mention,
SelfMention,
}
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct RenderedRegion {
pub background_kind: Option<BackgroundKind>,
pub link_url: Option<String>,
}
/// Allows one to specify extra links to the rendered markdown, which can be used
/// for e.g. mentions.
pub struct Mention {
pub range: Range<usize>,
pub is_self_mention: bool,
}
impl RichText {
pub fn element<V: 'static>(
&self,
syntax: Arc<SyntaxTheme>,
style: RichTextStyle,
cx: &mut ViewContext<V>,
) -> AnyElement<V> {
todo!();
// let mut region_id = 0;
// let view_id = cx.view_id();
// let regions = self.regions.clone();
// enum Markdown {}
// Text::new(self.text.clone(), style.text.clone())
// .with_highlights(
// self.highlights
// .iter()
// .filter_map(|(range, highlight)| {
// let style = match highlight {
// Highlight::Id(id) => id.style(&syntax)?,
// Highlight::Highlight(style) => style.clone(),
// Highlight::Mention => style.mention_highlight,
// Highlight::SelfMention => style.self_mention_highlight,
// };
// Some((range.clone(), style))
// })
// .collect::<Vec<_>>(),
// )
// .with_custom_runs(self.region_ranges.clone(), move |ix, bounds, cx| {
// region_id += 1;
// let region = regions[ix].clone();
// if let Some(url) = region.link_url {
// cx.scene().push_cursor_region(CursorRegion {
// bounds,
// style: CursorStyle::PointingHand,
// });
// cx.scene().push_mouse_region(
// MouseRegion::new::<Markdown>(view_id, region_id, bounds)
// .on_click::<V, _>(MouseButton::Left, move |_, _, cx| {
// cx.platform().open_url(&url)
// }),
// );
// }
// if let Some(region_kind) = &region.background_kind {
// let background = match region_kind {
// BackgroundKind::Code => style.code_background,
// BackgroundKind::Mention => style.mention_background,
// BackgroundKind::SelfMention => style.self_mention_background,
// };
// if background.is_some() {
// cx.scene().push_quad(gpui::Quad {
// bounds,
// background,
// border: Default::default(),
// corner_radii: (2.0).into(),
// });
// }
// }
// })
// .with_soft_wrap(true)
// .into_any()
}
pub fn add_mention(
&mut self,
range: Range<usize>,
is_current_user: bool,
mention_style: HighlightStyle,
) -> anyhow::Result<()> {
if range.end > self.text.len() {
bail!(
"Mention in range {range:?} is outside of bounds for a message of length {}",
self.text.len()
);
}
if is_current_user {
self.region_ranges.push(range.clone());
self.regions.push(RenderedRegion {
background_kind: Some(BackgroundKind::Mention),
link_url: None,
});
}
self.highlights
.push((range, Highlight::Highlight(mention_style)));
Ok(())
}
}
pub fn render_markdown_mut(
block: &str,
mut mentions: &[Mention],
language_registry: &Arc<LanguageRegistry>,
language: Option<&Arc<Language>>,
data: &mut RichText,
) {
use pulldown_cmark::{CodeBlockKind, Event, Options, Parser, Tag};
let mut bold_depth = 0;
let mut italic_depth = 0;
let mut link_url = None;
let mut current_language = None;
let mut list_stack = Vec::new();
let options = Options::all();
for (event, source_range) in Parser::new_ext(&block, options).into_offset_iter() {
let prev_len = data.text.len();
match event {
Event::Text(t) => {
if let Some(language) = &current_language {
render_code(&mut data.text, &mut data.highlights, t.as_ref(), language);
} else {
if let Some(mention) = mentions.first() {
if source_range.contains_inclusive(&mention.range) {
mentions = &mentions[1..];
let range = (prev_len + mention.range.start - source_range.start)
..(prev_len + mention.range.end - source_range.start);
data.highlights.push((
range.clone(),
if mention.is_self_mention {
Highlight::SelfMention
} else {
Highlight::Mention
},
));
data.region_ranges.push(range);
data.regions.push(RenderedRegion {
background_kind: Some(if mention.is_self_mention {
BackgroundKind::SelfMention
} else {
BackgroundKind::Mention
}),
link_url: None,
});
}
}
data.text.push_str(t.as_ref());
let mut style = HighlightStyle::default();
if bold_depth > 0 {
style.weight = Some(Weight::BOLD);
}
if italic_depth > 0 {
style.italic = Some(true);
}
if let Some(link_url) = link_url.clone() {
data.region_ranges.push(prev_len..data.text.len());
data.regions.push(RenderedRegion {
link_url: Some(link_url),
background_kind: None,
});
style.underline = Some(Underline {
thickness: 1.0.into(),
..Default::default()
});
}
if style != HighlightStyle::default() {
let mut new_highlight = true;
if let Some((last_range, last_style)) = data.highlights.last_mut() {
if last_range.end == prev_len
&& last_style == &Highlight::Highlight(style)
{
last_range.end = data.text.len();
new_highlight = false;
}
}
if new_highlight {
data.highlights
.push((prev_len..data.text.len(), Highlight::Highlight(style)));
}
}
}
}
Event::Code(t) => {
data.text.push_str(t.as_ref());
data.region_ranges.push(prev_len..data.text.len());
if link_url.is_some() {
data.highlights.push((
prev_len..data.text.len(),
Highlight::Highlight(HighlightStyle {
underline: Some(Underline {
thickness: 1.0.into(),
..Default::default()
}),
..Default::default()
}),
));
}
data.regions.push(RenderedRegion {
background_kind: Some(BackgroundKind::Code),
link_url: link_url.clone(),
});
}
Event::Start(tag) => match tag {
Tag::Paragraph => new_paragraph(&mut data.text, &mut list_stack),
Tag::Heading(_, _, _) => {
new_paragraph(&mut data.text, &mut list_stack);
bold_depth += 1;
}
Tag::CodeBlock(kind) => {
new_paragraph(&mut data.text, &mut list_stack);
current_language = if let CodeBlockKind::Fenced(language) = kind {
language_registry
.language_for_name(language.as_ref())
.now_or_never()
.and_then(Result::ok)
} else {
language.cloned()
}
}
Tag::Emphasis => italic_depth += 1,
Tag::Strong => bold_depth += 1,
Tag::Link(_, url, _) => link_url = Some(url.to_string()),
Tag::List(number) => {
list_stack.push((number, false));
}
Tag::Item => {
let len = list_stack.len();
if let Some((list_number, has_content)) = list_stack.last_mut() {
*has_content = false;
if !data.text.is_empty() && !data.text.ends_with('\n') {
data.text.push('\n');
}
for _ in 0..len - 1 {
data.text.push_str(" ");
}
if let Some(number) = list_number {
data.text.push_str(&format!("{}. ", number));
*number += 1;
*has_content = false;
} else {
data.text.push_str("- ");
}
}
}
_ => {}
},
Event::End(tag) => match tag {
Tag::Heading(_, _, _) => bold_depth -= 1,
Tag::CodeBlock(_) => current_language = None,
Tag::Emphasis => italic_depth -= 1,
Tag::Strong => bold_depth -= 1,
Tag::Link(_, _, _) => link_url = None,
Tag::List(_) => drop(list_stack.pop()),
_ => {}
},
Event::HardBreak => data.text.push('\n'),
Event::SoftBreak => data.text.push(' '),
_ => {}
}
}
}
pub fn render_markdown(
block: String,
mentions: &[Mention],
language_registry: &Arc<LanguageRegistry>,
language: Option<&Arc<Language>>,
) -> RichText {
let mut data = RichText {
text: Default::default(),
highlights: Default::default(),
region_ranges: Default::default(),
regions: Default::default(),
};
render_markdown_mut(&block, mentions, language_registry, language, &mut data);
data.text = data.text.trim().to_string();
data
}
pub fn render_code(
text: &mut String,
highlights: &mut Vec<(Range<usize>, Highlight)>,
content: &str,
language: &Arc<Language>,
) {
let prev_len = text.len();
text.push_str(content);
for (range, highlight_id) in language.highlight_text(&content.into(), 0..content.len()) {
highlights.push((
prev_len + range.start..prev_len + range.end,
Highlight::Id(highlight_id),
));
}
}
pub fn new_paragraph(text: &mut String, list_stack: &mut Vec<(Option<u64>, bool)>) {
let mut is_subsequent_paragraph_of_list = false;
if let Some((_, has_content)) = list_stack.last_mut() {
if *has_content {
is_subsequent_paragraph_of_list = true;
} else {
*has_content = true;
return;
}
}
if !text.is_empty() {
if !text.ends_with('\n') {
text.push('\n');
}
text.push('\n');
}
for _ in 0..list_stack.len().saturating_sub(1) {
text.push_str(" ");
}
if is_subsequent_paragraph_of_list {
text.push_str(" ");
}
}