fc8e515fe8
This PR enables the [`clippy::too_many_arguments`](https://rust-lang.github.io/rust-clippy/master/index.html#/too_many_arguments) rule. I opted to add `#[allow(clippy::too_many_arguments)]` on the individual violations, as reworking them to take fewer arguments is a more involved task. Release Notes: - N/A
407 lines
15 KiB
Rust
407 lines
15 KiB
Rust
use futures::FutureExt;
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use gpui::{
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AnyElement, ElementId, FontStyle, FontWeight, HighlightStyle, InteractiveText, IntoElement,
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SharedString, StrikethroughStyle, StyledText, UnderlineStyle, WindowContext,
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};
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use language::{HighlightId, Language, LanguageRegistry};
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use std::{ops::Range, sync::Arc};
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use theme::ActiveTheme;
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use ui::LinkPreview;
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use util::RangeExt;
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#[derive(Debug, Clone, PartialEq, Eq)]
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pub enum Highlight {
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Code,
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Id(HighlightId),
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InlineCode(bool),
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Highlight(HighlightStyle),
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Mention,
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SelfMention,
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}
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impl From<HighlightStyle> for Highlight {
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fn from(style: HighlightStyle) -> Self {
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Self::Highlight(style)
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}
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}
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impl From<HighlightId> for Highlight {
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fn from(style: HighlightId) -> Self {
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Self::Id(style)
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}
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}
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#[derive(Debug, Clone)]
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pub struct RichText {
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pub text: SharedString,
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pub highlights: Vec<(Range<usize>, Highlight)>,
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pub link_ranges: Vec<Range<usize>>,
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pub link_urls: Arc<[String]>,
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}
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/// Allows one to specify extra links to the rendered markdown, which can be used
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/// for e.g. mentions.
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#[derive(Debug)]
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pub struct Mention {
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pub range: Range<usize>,
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pub is_self_mention: bool,
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}
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impl RichText {
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pub fn element(&self, id: ElementId, cx: &WindowContext) -> AnyElement {
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let theme = cx.theme();
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let code_background = theme.colors().surface_background;
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InteractiveText::new(
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id,
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StyledText::new(self.text.clone()).with_highlights(
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&cx.text_style(),
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self.highlights.iter().map(|(range, highlight)| {
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(
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range.clone(),
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match highlight {
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Highlight::Code => HighlightStyle {
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background_color: Some(code_background),
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..Default::default()
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},
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Highlight::Id(id) => HighlightStyle {
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background_color: Some(code_background),
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..id.style(theme.syntax()).unwrap_or_default()
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},
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Highlight::InlineCode(link) => {
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if !*link {
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HighlightStyle {
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background_color: Some(code_background),
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..Default::default()
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}
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} else {
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HighlightStyle {
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background_color: Some(code_background),
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underline: Some(UnderlineStyle {
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thickness: 1.0.into(),
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..Default::default()
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}),
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..Default::default()
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}
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}
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}
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Highlight::Highlight(highlight) => *highlight,
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Highlight::Mention => HighlightStyle {
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font_weight: Some(FontWeight::BOLD),
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..Default::default()
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},
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Highlight::SelfMention => HighlightStyle {
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font_weight: Some(FontWeight::BOLD),
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..Default::default()
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},
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},
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)
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}),
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),
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)
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.on_click(self.link_ranges.clone(), {
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let link_urls = self.link_urls.clone();
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move |ix, cx| {
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let url = &link_urls[ix];
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if url.starts_with("http") {
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cx.open_url(url);
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}
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}
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})
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.tooltip({
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let link_ranges = self.link_ranges.clone();
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let link_urls = self.link_urls.clone();
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move |idx, cx| {
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for (ix, range) in link_ranges.iter().enumerate() {
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if range.contains(&idx) {
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return Some(LinkPreview::new(&link_urls[ix], cx));
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}
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}
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None
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}
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})
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.into_any_element()
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}
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}
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#[allow(clippy::too_many_arguments)]
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pub fn render_markdown_mut(
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block: &str,
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mut mentions: &[Mention],
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language_registry: &Arc<LanguageRegistry>,
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language: Option<&Arc<Language>>,
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text: &mut String,
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highlights: &mut Vec<(Range<usize>, Highlight)>,
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link_ranges: &mut Vec<Range<usize>>,
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link_urls: &mut Vec<String>,
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) {
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use pulldown_cmark::{CodeBlockKind, Event, Options, Parser, Tag, TagEnd};
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let mut bold_depth = 0;
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let mut italic_depth = 0;
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let mut strikethrough_depth = 0;
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let mut link_url = None;
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let mut current_language = None;
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let mut list_stack = Vec::new();
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let options = Options::all();
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for (event, source_range) in Parser::new_ext(block, options).into_offset_iter() {
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let prev_len = text.len();
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match event {
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Event::Text(t) => {
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if let Some(language) = ¤t_language {
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render_code(text, highlights, t.as_ref(), language);
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} else {
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while let Some(mention) = mentions.first() {
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if !source_range.contains_inclusive(&mention.range) {
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break;
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}
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mentions = &mentions[1..];
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let range = (prev_len + mention.range.start - source_range.start)
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..(prev_len + mention.range.end - source_range.start);
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highlights.push((
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range.clone(),
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if mention.is_self_mention {
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Highlight::SelfMention
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} else {
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Highlight::Mention
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},
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));
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}
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text.push_str(t.as_ref());
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let mut style = HighlightStyle::default();
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if bold_depth > 0 {
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style.font_weight = Some(FontWeight::BOLD);
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}
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if italic_depth > 0 {
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style.font_style = Some(FontStyle::Italic);
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}
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if strikethrough_depth > 0 {
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style.strikethrough = Some(StrikethroughStyle {
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thickness: 1.0.into(),
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..Default::default()
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});
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}
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let last_run_len = if let Some(link_url) = link_url.clone() {
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link_ranges.push(prev_len..text.len());
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link_urls.push(link_url);
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style.underline = Some(UnderlineStyle {
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thickness: 1.0.into(),
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..Default::default()
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});
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prev_len
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} else {
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// Manually scan for links
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let mut finder = linkify::LinkFinder::new();
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finder.kinds(&[linkify::LinkKind::Url]);
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let mut last_link_len = prev_len;
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for link in finder.links(&t) {
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let start = link.start();
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let end = link.end();
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let range = (prev_len + start)..(prev_len + end);
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link_ranges.push(range.clone());
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link_urls.push(link.as_str().to_string());
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// If there is a style before we match a link, we have to add this to the highlighted ranges
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if style != HighlightStyle::default() && last_link_len < link.start() {
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highlights.push((
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last_link_len..link.start(),
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Highlight::Highlight(style),
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));
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}
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highlights.push((
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range,
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Highlight::Highlight(HighlightStyle {
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underline: Some(UnderlineStyle {
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thickness: 1.0.into(),
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..Default::default()
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}),
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..style
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}),
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));
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last_link_len = end;
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}
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last_link_len
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};
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if style != HighlightStyle::default() && last_run_len < text.len() {
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let mut new_highlight = true;
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if let Some((last_range, last_style)) = highlights.last_mut() {
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if last_range.end == last_run_len
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&& last_style == &Highlight::Highlight(style)
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{
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last_range.end = text.len();
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new_highlight = false;
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}
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}
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if new_highlight {
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highlights
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.push((last_run_len..text.len(), Highlight::Highlight(style)));
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}
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}
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}
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}
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Event::Code(t) => {
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text.push_str(t.as_ref());
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let is_link = link_url.is_some();
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if let Some(link_url) = link_url.clone() {
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link_ranges.push(prev_len..text.len());
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link_urls.push(link_url);
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}
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highlights.push((prev_len..text.len(), Highlight::InlineCode(is_link)))
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}
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Event::Start(tag) => match tag {
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Tag::Paragraph => new_paragraph(text, &mut list_stack),
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Tag::Heading {
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level: _,
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id: _,
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classes: _,
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attrs: _,
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} => {
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new_paragraph(text, &mut list_stack);
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bold_depth += 1;
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}
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Tag::CodeBlock(kind) => {
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new_paragraph(text, &mut list_stack);
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current_language = if let CodeBlockKind::Fenced(language) = kind {
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language_registry
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.language_for_name(language.as_ref())
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.now_or_never()
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.and_then(Result::ok)
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} else {
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language.cloned()
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}
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}
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Tag::Emphasis => italic_depth += 1,
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Tag::Strong => bold_depth += 1,
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Tag::Strikethrough => strikethrough_depth += 1,
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Tag::Link {
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link_type: _,
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dest_url,
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title: _,
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id: _,
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} => link_url = Some(dest_url.to_string()),
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Tag::List(number) => {
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list_stack.push((number, false));
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}
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Tag::Item => {
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let len = list_stack.len();
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if let Some((list_number, has_content)) = list_stack.last_mut() {
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*has_content = false;
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if !text.is_empty() && !text.ends_with('\n') {
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text.push('\n');
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}
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for _ in 0..len - 1 {
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text.push_str(" ");
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}
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if let Some(number) = list_number {
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text.push_str(&format!("{}. ", number));
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*number += 1;
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*has_content = false;
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} else {
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text.push_str("- ");
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}
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}
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}
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_ => {}
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},
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Event::End(tag) => match tag {
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TagEnd::Heading(_) => bold_depth -= 1,
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TagEnd::CodeBlock => current_language = None,
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TagEnd::Emphasis => italic_depth -= 1,
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TagEnd::Strong => bold_depth -= 1,
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TagEnd::Strikethrough => strikethrough_depth -= 1,
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TagEnd::Link => link_url = None,
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TagEnd::List(_) => drop(list_stack.pop()),
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_ => {}
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},
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Event::HardBreak => text.push('\n'),
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Event::SoftBreak => text.push('\n'),
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_ => {}
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}
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}
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}
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pub fn render_rich_text(
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block: String,
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mentions: &[Mention],
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language_registry: &Arc<LanguageRegistry>,
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language: Option<&Arc<Language>>,
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) -> RichText {
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let mut text = String::new();
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let mut highlights = Vec::new();
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let mut link_ranges = Vec::new();
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let mut link_urls = Vec::new();
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render_markdown_mut(
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&block,
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mentions,
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language_registry,
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language,
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&mut text,
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&mut highlights,
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&mut link_ranges,
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&mut link_urls,
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);
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text.truncate(text.trim_end().len());
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RichText {
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text: SharedString::from(text),
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link_urls: link_urls.into(),
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link_ranges,
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highlights,
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}
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}
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pub fn render_code(
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text: &mut String,
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highlights: &mut Vec<(Range<usize>, Highlight)>,
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content: &str,
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language: &Arc<Language>,
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) {
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let prev_len = text.len();
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text.push_str(content);
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let mut offset = 0;
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for (range, highlight_id) in language.highlight_text(&content.into(), 0..content.len()) {
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if range.start > offset {
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highlights.push((prev_len + offset..prev_len + range.start, Highlight::Code));
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}
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highlights.push((
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prev_len + range.start..prev_len + range.end,
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Highlight::Id(highlight_id),
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));
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offset = range.end;
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}
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if offset < content.len() {
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highlights.push((prev_len + offset..prev_len + content.len(), Highlight::Code));
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}
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}
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pub fn new_paragraph(text: &mut String, list_stack: &mut Vec<(Option<u64>, bool)>) {
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let mut is_subsequent_paragraph_of_list = false;
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if let Some((_, has_content)) = list_stack.last_mut() {
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if *has_content {
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is_subsequent_paragraph_of_list = true;
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} else {
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*has_content = true;
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return;
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}
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}
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if !text.is_empty() {
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if !text.ends_with('\n') {
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text.push('\n');
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}
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text.push('\n');
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}
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for _ in 0..list_stack.len().saturating_sub(1) {
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text.push_str(" ");
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}
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if is_subsequent_paragraph_of_list {
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text.push_str(" ");
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}
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}
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