hover_links.rs

   1use crate::{
   2    Anchor, Editor, EditorSettings, EditorSnapshot, FindAllReferences, GoToDefinition,
   3    GoToDefinitionSplit, GoToTypeDefinition, GoToTypeDefinitionSplit, GotoDefinitionKind, InlayId,
   4    Navigated, PointForPosition, SelectPhase,
   5    editor_settings::GoToDefinitionFallback,
   6    hover_popover::{self, InlayHover},
   7    scroll::ScrollAmount,
   8};
   9use gpui::{App, AsyncWindowContext, Context, Entity, Modifiers, Task, Window, px};
  10use language::{Bias, ToOffset};
  11use linkify::{LinkFinder, LinkKind};
  12use lsp::LanguageServerId;
  13use project::{
  14    HoverBlock, HoverBlockKind, InlayHintLabelPartTooltip, InlayHintTooltip, LocationLink, Project,
  15    ResolveState, ResolvedPath,
  16};
  17use settings::Settings;
  18use std::ops::Range;
  19use theme::ActiveTheme as _;
  20use util::{ResultExt, TryFutureExt as _, maybe};
  21
  22#[derive(Debug)]
  23pub struct HoveredLinkState {
  24    pub last_trigger_point: TriggerPoint,
  25    pub preferred_kind: GotoDefinitionKind,
  26    pub symbol_range: Option<RangeInEditor>,
  27    pub links: Vec<HoverLink>,
  28    pub task: Option<Task<Option<()>>>,
  29}
  30
  31#[derive(Debug, Eq, PartialEq, Clone)]
  32pub enum RangeInEditor {
  33    Text(Range<Anchor>),
  34    Inlay(InlayHighlight),
  35}
  36
  37impl RangeInEditor {
  38    pub fn as_text_range(&self) -> Option<Range<Anchor>> {
  39        match self {
  40            Self::Text(range) => Some(range.clone()),
  41            Self::Inlay(_) => None,
  42        }
  43    }
  44
  45    pub fn point_within_range(
  46        &self,
  47        trigger_point: &TriggerPoint,
  48        snapshot: &EditorSnapshot,
  49    ) -> bool {
  50        match (self, trigger_point) {
  51            (Self::Text(range), TriggerPoint::Text(point)) => {
  52                let point_after_start = range.start.cmp(point, &snapshot.buffer_snapshot()).is_le();
  53                point_after_start && range.end.cmp(point, &snapshot.buffer_snapshot()).is_ge()
  54            }
  55            (Self::Inlay(highlight), TriggerPoint::InlayHint(point, _, _)) => {
  56                highlight.inlay == point.inlay
  57                    && highlight.range.contains(&point.range.start)
  58                    && highlight.range.contains(&point.range.end)
  59            }
  60            (Self::Inlay(_), TriggerPoint::Text(_))
  61            | (Self::Text(_), TriggerPoint::InlayHint(_, _, _)) => false,
  62        }
  63    }
  64}
  65
  66#[derive(Debug, Clone)]
  67pub enum HoverLink {
  68    Url(String),
  69    File(ResolvedPath),
  70    Text(LocationLink),
  71    InlayHint(lsp::Location, LanguageServerId),
  72}
  73
  74#[derive(Debug, Clone, PartialEq, Eq)]
  75pub struct InlayHighlight {
  76    pub inlay: InlayId,
  77    pub inlay_position: Anchor,
  78    pub range: Range<usize>,
  79}
  80
  81#[derive(Debug, Clone, PartialEq)]
  82pub enum TriggerPoint {
  83    Text(Anchor),
  84    InlayHint(InlayHighlight, lsp::Location, LanguageServerId),
  85}
  86
  87impl TriggerPoint {
  88    fn anchor(&self) -> &Anchor {
  89        match self {
  90            TriggerPoint::Text(anchor) => anchor,
  91            TriggerPoint::InlayHint(inlay_range, _, _) => &inlay_range.inlay_position,
  92        }
  93    }
  94}
  95
  96pub fn exclude_link_to_position(
  97    buffer: &Entity<language::Buffer>,
  98    current_position: &text::Anchor,
  99    location: &LocationLink,
 100    cx: &App,
 101) -> bool {
 102    // Exclude definition links that points back to cursor position.
 103    // (i.e., currently cursor upon definition).
 104    let snapshot = buffer.read(cx).snapshot();
 105    !(buffer == &location.target.buffer
 106        && current_position
 107            .bias_right(&snapshot)
 108            .cmp(&location.target.range.start, &snapshot)
 109            .is_ge()
 110        && current_position
 111            .cmp(&location.target.range.end, &snapshot)
 112            .is_le())
 113}
 114
 115impl Editor {
 116    pub(crate) fn update_hovered_link(
 117        &mut self,
 118        point_for_position: PointForPosition,
 119        snapshot: &EditorSnapshot,
 120        modifiers: Modifiers,
 121        window: &mut Window,
 122        cx: &mut Context<Self>,
 123    ) {
 124        let hovered_link_modifier = Editor::multi_cursor_modifier(false, &modifiers, cx);
 125        if !hovered_link_modifier || self.has_pending_selection() {
 126            self.hide_hovered_link(cx);
 127            return;
 128        }
 129
 130        match point_for_position.as_valid() {
 131            Some(point) => {
 132                let trigger_point = TriggerPoint::Text(
 133                    snapshot
 134                        .buffer_snapshot()
 135                        .anchor_before(point.to_offset(&snapshot.display_snapshot, Bias::Left)),
 136                );
 137
 138                show_link_definition(modifiers.shift, self, trigger_point, snapshot, window, cx);
 139            }
 140            None => {
 141                update_inlay_link_and_hover_points(
 142                    snapshot,
 143                    point_for_position,
 144                    self,
 145                    hovered_link_modifier,
 146                    modifiers.shift,
 147                    window,
 148                    cx,
 149                );
 150            }
 151        }
 152    }
 153
 154    pub(crate) fn hide_hovered_link(&mut self, cx: &mut Context<Self>) {
 155        self.hovered_link_state.take();
 156        self.clear_highlights::<HoveredLinkState>(cx);
 157    }
 158
 159    pub(crate) fn handle_click_hovered_link(
 160        &mut self,
 161        point: PointForPosition,
 162        modifiers: Modifiers,
 163        window: &mut Window,
 164        cx: &mut Context<Editor>,
 165    ) {
 166        let reveal_task = self.cmd_click_reveal_task(point, modifiers, window, cx);
 167        cx.spawn_in(window, async move |editor, cx| {
 168            let definition_revealed = reveal_task.await.log_err().unwrap_or(Navigated::No);
 169            let find_references = editor
 170                .update_in(cx, |editor, window, cx| {
 171                    if definition_revealed == Navigated::Yes {
 172                        return None;
 173                    }
 174                    match EditorSettings::get_global(cx).go_to_definition_fallback {
 175                        GoToDefinitionFallback::None => None,
 176                        GoToDefinitionFallback::FindAllReferences => {
 177                            editor.find_all_references(&FindAllReferences, window, cx)
 178                        }
 179                    }
 180                })
 181                .ok()
 182                .flatten();
 183            if let Some(find_references) = find_references {
 184                find_references.await.log_err();
 185            }
 186        })
 187        .detach();
 188    }
 189
 190    pub fn scroll_hover(
 191        &mut self,
 192        amount: ScrollAmount,
 193        window: &mut Window,
 194        cx: &mut Context<Self>,
 195    ) -> bool {
 196        let selection = self.selections.newest_anchor().head();
 197        let snapshot = self.snapshot(window, cx);
 198
 199        if let Some(popover) = self.hover_state.info_popovers.iter().find(|popover| {
 200            popover
 201                .symbol_range
 202                .point_within_range(&TriggerPoint::Text(selection), &snapshot)
 203        }) {
 204            popover.scroll(amount, window, cx);
 205            true
 206        } else if let Some(context_menu) = self.context_menu.borrow_mut().as_mut() {
 207            context_menu.scroll_aside(amount, window, cx);
 208            true
 209        } else {
 210            false
 211        }
 212    }
 213
 214    fn cmd_click_reveal_task(
 215        &mut self,
 216        point: PointForPosition,
 217        modifiers: Modifiers,
 218        window: &mut Window,
 219        cx: &mut Context<Editor>,
 220    ) -> Task<anyhow::Result<Navigated>> {
 221        if let Some(hovered_link_state) = self.hovered_link_state.take() {
 222            self.hide_hovered_link(cx);
 223            if !hovered_link_state.links.is_empty() {
 224                if !self.focus_handle.is_focused(window) {
 225                    window.focus(&self.focus_handle);
 226                }
 227
 228                // exclude links pointing back to the current anchor
 229                let current_position = point
 230                    .next_valid
 231                    .to_point(&self.snapshot(window, cx).display_snapshot);
 232                let Some((buffer, anchor)) = self
 233                    .buffer()
 234                    .read(cx)
 235                    .text_anchor_for_position(current_position, cx)
 236                else {
 237                    return Task::ready(Ok(Navigated::No));
 238                };
 239                let links = hovered_link_state
 240                    .links
 241                    .into_iter()
 242                    .filter(|link| {
 243                        if let HoverLink::Text(location) = link {
 244                            exclude_link_to_position(&buffer, &anchor, location, cx)
 245                        } else {
 246                            true
 247                        }
 248                    })
 249                    .collect();
 250                let navigate_task =
 251                    self.navigate_to_hover_links(None, links, modifiers.alt, window, cx);
 252                self.select(SelectPhase::End, window, cx);
 253                return navigate_task;
 254            }
 255        }
 256
 257        // We don't have the correct kind of link cached, set the selection on
 258        // click and immediately trigger GoToDefinition.
 259        self.select(
 260            SelectPhase::Begin {
 261                position: point.next_valid,
 262                add: false,
 263                click_count: 1,
 264            },
 265            window,
 266            cx,
 267        );
 268
 269        let navigate_task = if point.as_valid().is_some() {
 270            match (modifiers.shift, modifiers.alt) {
 271                (true, true) => {
 272                    self.go_to_type_definition_split(&GoToTypeDefinitionSplit, window, cx)
 273                }
 274                (true, false) => self.go_to_type_definition(&GoToTypeDefinition, window, cx),
 275                (false, true) => self.go_to_definition_split(&GoToDefinitionSplit, window, cx),
 276                (false, false) => self.go_to_definition(&GoToDefinition, window, cx),
 277            }
 278        } else {
 279            Task::ready(Ok(Navigated::No))
 280        };
 281        self.select(SelectPhase::End, window, cx);
 282        navigate_task
 283    }
 284}
 285
 286pub fn update_inlay_link_and_hover_points(
 287    snapshot: &EditorSnapshot,
 288    point_for_position: PointForPosition,
 289    editor: &mut Editor,
 290    secondary_held: bool,
 291    shift_held: bool,
 292    window: &mut Window,
 293    cx: &mut Context<Editor>,
 294) {
 295    let hovered_offset = if point_for_position.column_overshoot_after_line_end == 0 {
 296        Some(snapshot.display_point_to_inlay_offset(point_for_position.exact_unclipped, Bias::Left))
 297    } else {
 298        None
 299    };
 300    let mut go_to_definition_updated = false;
 301    let mut hover_updated = false;
 302    if let Some(hovered_offset) = hovered_offset {
 303        let buffer_snapshot = editor.buffer().read(cx).snapshot(cx);
 304        let previous_valid_anchor =
 305            buffer_snapshot.anchor_before(point_for_position.previous_valid.to_point(snapshot));
 306        let next_valid_anchor =
 307            buffer_snapshot.anchor_after(point_for_position.next_valid.to_point(snapshot));
 308        if let Some(hovered_hint) = editor
 309            .visible_inlay_hints(cx)
 310            .skip_while(|hint| {
 311                hint.position
 312                    .cmp(&previous_valid_anchor, &buffer_snapshot)
 313                    .is_lt()
 314            })
 315            .take_while(|hint| {
 316                hint.position
 317                    .cmp(&next_valid_anchor, &buffer_snapshot)
 318                    .is_le()
 319            })
 320            .max_by_key(|hint| hint.id)
 321        {
 322            let inlay_hint_cache = editor.inlay_hint_cache();
 323            let excerpt_id = previous_valid_anchor.excerpt_id;
 324            if let Some(cached_hint) = inlay_hint_cache.hint_by_id(excerpt_id, hovered_hint.id) {
 325                match cached_hint.resolve_state {
 326                    ResolveState::CanResolve(_, _) => {
 327                        if let Some(buffer_id) = snapshot
 328                            .buffer_snapshot()
 329                            .buffer_id_for_anchor(previous_valid_anchor)
 330                        {
 331                            inlay_hint_cache.spawn_hint_resolve(
 332                                buffer_id,
 333                                excerpt_id,
 334                                hovered_hint.id,
 335                                window,
 336                                cx,
 337                            );
 338                        }
 339                    }
 340                    ResolveState::Resolved => {
 341                        let mut extra_shift_left = 0;
 342                        let mut extra_shift_right = 0;
 343                        if cached_hint.padding_left {
 344                            extra_shift_left += 1;
 345                            extra_shift_right += 1;
 346                        }
 347                        if cached_hint.padding_right {
 348                            extra_shift_right += 1;
 349                        }
 350                        match cached_hint.label {
 351                            project::InlayHintLabel::String(_) => {
 352                                if let Some(tooltip) = cached_hint.tooltip {
 353                                    hover_popover::hover_at_inlay(
 354                                        editor,
 355                                        InlayHover {
 356                                            tooltip: match tooltip {
 357                                                InlayHintTooltip::String(text) => HoverBlock {
 358                                                    text,
 359                                                    kind: HoverBlockKind::PlainText,
 360                                                },
 361                                                InlayHintTooltip::MarkupContent(content) => {
 362                                                    HoverBlock {
 363                                                        text: content.value,
 364                                                        kind: content.kind,
 365                                                    }
 366                                                }
 367                                            },
 368                                            range: InlayHighlight {
 369                                                inlay: hovered_hint.id,
 370                                                inlay_position: hovered_hint.position,
 371                                                range: extra_shift_left
 372                                                    ..hovered_hint.text().len() + extra_shift_right,
 373                                            },
 374                                        },
 375                                        window,
 376                                        cx,
 377                                    );
 378                                    hover_updated = true;
 379                                }
 380                            }
 381                            project::InlayHintLabel::LabelParts(label_parts) => {
 382                                let hint_start =
 383                                    snapshot.anchor_to_inlay_offset(hovered_hint.position);
 384                                if let Some((hovered_hint_part, part_range)) =
 385                                    hover_popover::find_hovered_hint_part(
 386                                        label_parts,
 387                                        hint_start,
 388                                        hovered_offset,
 389                                    )
 390                                {
 391                                    let highlight_start =
 392                                        (part_range.start - hint_start).0 + extra_shift_left;
 393                                    let highlight_end =
 394                                        (part_range.end - hint_start).0 + extra_shift_right;
 395                                    let highlight = InlayHighlight {
 396                                        inlay: hovered_hint.id,
 397                                        inlay_position: hovered_hint.position,
 398                                        range: highlight_start..highlight_end,
 399                                    };
 400                                    if let Some(tooltip) = hovered_hint_part.tooltip {
 401                                        hover_popover::hover_at_inlay(
 402                                            editor,
 403                                            InlayHover {
 404                                                tooltip: match tooltip {
 405                                                    InlayHintLabelPartTooltip::String(text) => {
 406                                                        HoverBlock {
 407                                                            text,
 408                                                            kind: HoverBlockKind::PlainText,
 409                                                        }
 410                                                    }
 411                                                    InlayHintLabelPartTooltip::MarkupContent(
 412                                                        content,
 413                                                    ) => HoverBlock {
 414                                                        text: content.value,
 415                                                        kind: content.kind,
 416                                                    },
 417                                                },
 418                                                range: highlight.clone(),
 419                                            },
 420                                            window,
 421                                            cx,
 422                                        );
 423                                        hover_updated = true;
 424                                    }
 425                                    if let Some((language_server_id, location)) =
 426                                        hovered_hint_part.location
 427                                        && secondary_held
 428                                        && !editor.has_pending_nonempty_selection()
 429                                    {
 430                                        go_to_definition_updated = true;
 431                                        show_link_definition(
 432                                            shift_held,
 433                                            editor,
 434                                            TriggerPoint::InlayHint(
 435                                                highlight,
 436                                                location,
 437                                                language_server_id,
 438                                            ),
 439                                            snapshot,
 440                                            window,
 441                                            cx,
 442                                        );
 443                                    }
 444                                }
 445                            }
 446                        };
 447                    }
 448                    ResolveState::Resolving => {}
 449                }
 450            }
 451        }
 452    }
 453
 454    if !go_to_definition_updated {
 455        editor.hide_hovered_link(cx)
 456    }
 457    if !hover_updated {
 458        hover_popover::hover_at(editor, None, window, cx);
 459    }
 460}
 461
 462pub fn show_link_definition(
 463    shift_held: bool,
 464    editor: &mut Editor,
 465    trigger_point: TriggerPoint,
 466    snapshot: &EditorSnapshot,
 467    window: &mut Window,
 468    cx: &mut Context<Editor>,
 469) {
 470    let preferred_kind = match trigger_point {
 471        TriggerPoint::Text(_) if !shift_held => GotoDefinitionKind::Symbol,
 472        _ => GotoDefinitionKind::Type,
 473    };
 474
 475    let (mut hovered_link_state, is_cached) =
 476        if let Some(existing) = editor.hovered_link_state.take() {
 477            (existing, true)
 478        } else {
 479            (
 480                HoveredLinkState {
 481                    last_trigger_point: trigger_point.clone(),
 482                    symbol_range: None,
 483                    preferred_kind,
 484                    links: vec![],
 485                    task: None,
 486                },
 487                false,
 488            )
 489        };
 490
 491    if editor.pending_rename.is_some() {
 492        return;
 493    }
 494
 495    let trigger_anchor = trigger_point.anchor();
 496    let anchor = snapshot.buffer_snapshot().anchor_before(*trigger_anchor);
 497    let Some(buffer) = editor.buffer().read(cx).buffer_for_anchor(anchor, cx) else {
 498        return;
 499    };
 500    let Anchor {
 501        excerpt_id,
 502        text_anchor,
 503        ..
 504    } = anchor;
 505    let same_kind = hovered_link_state.preferred_kind == preferred_kind
 506        || hovered_link_state
 507            .links
 508            .first()
 509            .is_some_and(|d| matches!(d, HoverLink::Url(_)));
 510
 511    if same_kind {
 512        if is_cached && (hovered_link_state.last_trigger_point == trigger_point)
 513            || hovered_link_state
 514                .symbol_range
 515                .as_ref()
 516                .is_some_and(|symbol_range| {
 517                    symbol_range.point_within_range(&trigger_point, snapshot)
 518                })
 519        {
 520            editor.hovered_link_state = Some(hovered_link_state);
 521            return;
 522        }
 523    } else {
 524        editor.hide_hovered_link(cx)
 525    }
 526    let project = editor.project.clone();
 527    let provider = editor.semantics_provider.clone();
 528
 529    let snapshot = snapshot.buffer_snapshot().clone();
 530    hovered_link_state.task = Some(cx.spawn_in(window, async move |this, cx| {
 531        async move {
 532            let result = match &trigger_point {
 533                TriggerPoint::Text(_) => {
 534                    if let Some((url_range, url)) = find_url(&buffer, text_anchor, cx.clone()) {
 535                        this.read_with(cx, |_, _| {
 536                            let range = maybe!({
 537                                let start =
 538                                    snapshot.anchor_in_excerpt(excerpt_id, url_range.start)?;
 539                                let end = snapshot.anchor_in_excerpt(excerpt_id, url_range.end)?;
 540                                Some(RangeInEditor::Text(start..end))
 541                            });
 542                            (range, vec![HoverLink::Url(url)])
 543                        })
 544                        .ok()
 545                    } else if let Some((filename_range, filename)) =
 546                        find_file(&buffer, project.clone(), text_anchor, cx).await
 547                    {
 548                        let range = maybe!({
 549                            let start =
 550                                snapshot.anchor_in_excerpt(excerpt_id, filename_range.start)?;
 551                            let end = snapshot.anchor_in_excerpt(excerpt_id, filename_range.end)?;
 552                            Some(RangeInEditor::Text(start..end))
 553                        });
 554
 555                        Some((range, vec![HoverLink::File(filename)]))
 556                    } else if let Some(provider) = provider {
 557                        let task = cx.update(|_, cx| {
 558                            provider.definitions(&buffer, text_anchor, preferred_kind, cx)
 559                        })?;
 560                        if let Some(task) = task {
 561                            task.await.ok().flatten().map(|definition_result| {
 562                                (
 563                                    definition_result.iter().find_map(|link| {
 564                                        link.origin.as_ref().and_then(|origin| {
 565                                            let start = snapshot.anchor_in_excerpt(
 566                                                excerpt_id,
 567                                                origin.range.start,
 568                                            )?;
 569                                            let end = snapshot
 570                                                .anchor_in_excerpt(excerpt_id, origin.range.end)?;
 571                                            Some(RangeInEditor::Text(start..end))
 572                                        })
 573                                    }),
 574                                    definition_result.into_iter().map(HoverLink::Text).collect(),
 575                                )
 576                            })
 577                        } else {
 578                            None
 579                        }
 580                    } else {
 581                        None
 582                    }
 583                }
 584                TriggerPoint::InlayHint(highlight, lsp_location, server_id) => Some((
 585                    Some(RangeInEditor::Inlay(highlight.clone())),
 586                    vec![HoverLink::InlayHint(lsp_location.clone(), *server_id)],
 587                )),
 588            };
 589
 590            this.update(cx, |editor, cx| {
 591                // Clear any existing highlights
 592                editor.clear_highlights::<HoveredLinkState>(cx);
 593                let Some(hovered_link_state) = editor.hovered_link_state.as_mut() else {
 594                    editor.hide_hovered_link(cx);
 595                    return;
 596                };
 597                hovered_link_state.preferred_kind = preferred_kind;
 598                hovered_link_state.symbol_range = result
 599                    .as_ref()
 600                    .and_then(|(symbol_range, _)| symbol_range.clone());
 601
 602                if let Some((symbol_range, definitions)) = result {
 603                    hovered_link_state.links = definitions;
 604
 605                    let underline_hovered_link = !hovered_link_state.links.is_empty()
 606                        || hovered_link_state.symbol_range.is_some();
 607
 608                    if underline_hovered_link {
 609                        let style = gpui::HighlightStyle {
 610                            underline: Some(gpui::UnderlineStyle {
 611                                thickness: px(1.),
 612                                ..Default::default()
 613                            }),
 614                            color: Some(cx.theme().colors().link_text_hover),
 615                            ..Default::default()
 616                        };
 617                        let highlight_range =
 618                            symbol_range.unwrap_or_else(|| match &trigger_point {
 619                                TriggerPoint::Text(trigger_anchor) => {
 620                                    // If no symbol range returned from language server, use the surrounding word.
 621                                    let (offset_range, _) =
 622                                        snapshot.surrounding_word(*trigger_anchor, None);
 623                                    RangeInEditor::Text(
 624                                        snapshot.anchor_before(offset_range.start)
 625                                            ..snapshot.anchor_after(offset_range.end),
 626                                    )
 627                                }
 628                                TriggerPoint::InlayHint(highlight, _, _) => {
 629                                    RangeInEditor::Inlay(highlight.clone())
 630                                }
 631                            });
 632
 633                        match highlight_range {
 634                            RangeInEditor::Text(text_range) => editor
 635                                .highlight_text::<HoveredLinkState>(vec![text_range], style, cx),
 636                            RangeInEditor::Inlay(highlight) => editor
 637                                .highlight_inlays::<HoveredLinkState>(vec![highlight], style, cx),
 638                        }
 639                    }
 640                } else {
 641                    editor.hide_hovered_link(cx);
 642                }
 643            })?;
 644
 645            anyhow::Ok(())
 646        }
 647        .log_err()
 648        .await
 649    }));
 650
 651    editor.hovered_link_state = Some(hovered_link_state);
 652}
 653
 654pub(crate) fn find_url(
 655    buffer: &Entity<language::Buffer>,
 656    position: text::Anchor,
 657    cx: AsyncWindowContext,
 658) -> Option<(Range<text::Anchor>, String)> {
 659    const LIMIT: usize = 2048;
 660
 661    let snapshot = buffer.read_with(&cx, |buffer, _| buffer.snapshot()).ok()?;
 662
 663    let offset = position.to_offset(&snapshot);
 664    let mut token_start = offset;
 665    let mut token_end = offset;
 666    let mut found_start = false;
 667    let mut found_end = false;
 668
 669    for ch in snapshot.reversed_chars_at(offset).take(LIMIT) {
 670        if ch.is_whitespace() {
 671            found_start = true;
 672            break;
 673        }
 674        token_start -= ch.len_utf8();
 675    }
 676    // Check if we didn't find the starting whitespace or if we didn't reach the start of the buffer
 677    if !found_start && token_start != 0 {
 678        return None;
 679    }
 680
 681    for ch in snapshot
 682        .chars_at(offset)
 683        .take(LIMIT - (offset - token_start))
 684    {
 685        if ch.is_whitespace() {
 686            found_end = true;
 687            break;
 688        }
 689        token_end += ch.len_utf8();
 690    }
 691    // Check if we didn't find the ending whitespace or if we read more or equal than LIMIT
 692    // which at this point would happen only if we reached the end of buffer
 693    if !found_end && (token_end - token_start >= LIMIT) {
 694        return None;
 695    }
 696
 697    let mut finder = LinkFinder::new();
 698    finder.kinds(&[LinkKind::Url]);
 699    let input = snapshot
 700        .text_for_range(token_start..token_end)
 701        .collect::<String>();
 702
 703    let relative_offset = offset - token_start;
 704    for link in finder.links(&input) {
 705        if link.start() <= relative_offset && link.end() >= relative_offset {
 706            let range = snapshot.anchor_before(token_start + link.start())
 707                ..snapshot.anchor_after(token_start + link.end());
 708            return Some((range, link.as_str().to_string()));
 709        }
 710    }
 711    None
 712}
 713
 714pub(crate) fn find_url_from_range(
 715    buffer: &Entity<language::Buffer>,
 716    range: Range<text::Anchor>,
 717    cx: AsyncWindowContext,
 718) -> Option<String> {
 719    const LIMIT: usize = 2048;
 720
 721    let Ok(snapshot) = buffer.read_with(&cx, |buffer, _| buffer.snapshot()) else {
 722        return None;
 723    };
 724
 725    let start_offset = range.start.to_offset(&snapshot);
 726    let end_offset = range.end.to_offset(&snapshot);
 727
 728    let mut token_start = start_offset.min(end_offset);
 729    let mut token_end = start_offset.max(end_offset);
 730
 731    let range_len = token_end - token_start;
 732
 733    if range_len >= LIMIT {
 734        return None;
 735    }
 736
 737    // Skip leading whitespace
 738    for ch in snapshot.chars_at(token_start).take(range_len) {
 739        if !ch.is_whitespace() {
 740            break;
 741        }
 742        token_start += ch.len_utf8();
 743    }
 744
 745    // Skip trailing whitespace
 746    for ch in snapshot.reversed_chars_at(token_end).take(range_len) {
 747        if !ch.is_whitespace() {
 748            break;
 749        }
 750        token_end -= ch.len_utf8();
 751    }
 752
 753    if token_start >= token_end {
 754        return None;
 755    }
 756
 757    let text = snapshot
 758        .text_for_range(token_start..token_end)
 759        .collect::<String>();
 760
 761    let mut finder = LinkFinder::new();
 762    finder.kinds(&[LinkKind::Url]);
 763
 764    if let Some(link) = finder.links(&text).next()
 765        && link.start() == 0
 766        && link.end() == text.len()
 767    {
 768        return Some(link.as_str().to_string());
 769    }
 770
 771    None
 772}
 773
 774pub(crate) async fn find_file(
 775    buffer: &Entity<language::Buffer>,
 776    project: Option<Entity<Project>>,
 777    position: text::Anchor,
 778    cx: &mut AsyncWindowContext,
 779) -> Option<(Range<text::Anchor>, ResolvedPath)> {
 780    let project = project?;
 781    let snapshot = buffer.read_with(cx, |buffer, _| buffer.snapshot()).ok()?;
 782    let scope = snapshot.language_scope_at(position);
 783    let (range, candidate_file_path) = surrounding_filename(snapshot, position)?;
 784
 785    async fn check_path(
 786        candidate_file_path: &str,
 787        project: &Entity<Project>,
 788        buffer: &Entity<language::Buffer>,
 789        cx: &mut AsyncWindowContext,
 790    ) -> Option<ResolvedPath> {
 791        project
 792            .update(cx, |project, cx| {
 793                project.resolve_path_in_buffer(candidate_file_path, buffer, cx)
 794            })
 795            .ok()?
 796            .await
 797            .filter(|s| s.is_file())
 798    }
 799
 800    if let Some(existing_path) = check_path(&candidate_file_path, &project, buffer, cx).await {
 801        return Some((range, existing_path));
 802    }
 803
 804    if let Some(scope) = scope {
 805        for suffix in scope.path_suffixes() {
 806            if candidate_file_path.ends_with(format!(".{suffix}").as_str()) {
 807                continue;
 808            }
 809
 810            let suffixed_candidate = format!("{candidate_file_path}.{suffix}");
 811            if let Some(existing_path) = check_path(&suffixed_candidate, &project, buffer, cx).await
 812            {
 813                return Some((range, existing_path));
 814            }
 815        }
 816    }
 817
 818    None
 819}
 820
 821fn surrounding_filename(
 822    snapshot: language::BufferSnapshot,
 823    position: text::Anchor,
 824) -> Option<(Range<text::Anchor>, String)> {
 825    const LIMIT: usize = 2048;
 826
 827    let offset = position.to_offset(&snapshot);
 828    let mut token_start = offset;
 829    let mut token_end = offset;
 830    let mut found_start = false;
 831    let mut found_end = false;
 832    let mut inside_quotes = false;
 833
 834    let mut filename = String::new();
 835
 836    let mut backwards = snapshot.reversed_chars_at(offset).take(LIMIT).peekable();
 837    while let Some(ch) = backwards.next() {
 838        // Escaped whitespace
 839        if ch.is_whitespace() && backwards.peek() == Some(&'\\') {
 840            filename.push(ch);
 841            token_start -= ch.len_utf8();
 842            backwards.next();
 843            token_start -= '\\'.len_utf8();
 844            continue;
 845        }
 846        if ch.is_whitespace() {
 847            found_start = true;
 848            break;
 849        }
 850        if (ch == '"' || ch == '\'') && !inside_quotes {
 851            found_start = true;
 852            inside_quotes = true;
 853            break;
 854        }
 855
 856        filename.push(ch);
 857        token_start -= ch.len_utf8();
 858    }
 859    if !found_start && token_start != 0 {
 860        return None;
 861    }
 862
 863    filename = filename.chars().rev().collect();
 864
 865    let mut forwards = snapshot
 866        .chars_at(offset)
 867        .take(LIMIT - (offset - token_start))
 868        .peekable();
 869    while let Some(ch) = forwards.next() {
 870        // Skip escaped whitespace
 871        if ch == '\\' && forwards.peek().is_some_and(|ch| ch.is_whitespace()) {
 872            token_end += ch.len_utf8();
 873            let whitespace = forwards.next().unwrap();
 874            token_end += whitespace.len_utf8();
 875            filename.push(whitespace);
 876            continue;
 877        }
 878
 879        if ch.is_whitespace() {
 880            found_end = true;
 881            break;
 882        }
 883        if ch == '"' || ch == '\'' {
 884            // If we're inside quotes, we stop when we come across the next quote
 885            if inside_quotes {
 886                found_end = true;
 887                break;
 888            } else {
 889                // Otherwise, we skip the quote
 890                inside_quotes = true;
 891                token_end += ch.len_utf8();
 892                continue;
 893            }
 894        }
 895        filename.push(ch);
 896        token_end += ch.len_utf8();
 897    }
 898
 899    if !found_end && (token_end - token_start >= LIMIT) {
 900        return None;
 901    }
 902
 903    if filename.is_empty() {
 904        return None;
 905    }
 906
 907    let range = snapshot.anchor_before(token_start)..snapshot.anchor_after(token_end);
 908
 909    Some((range, filename))
 910}
 911
 912#[cfg(test)]
 913mod tests {
 914    use super::*;
 915    use crate::{
 916        DisplayPoint,
 917        display_map::ToDisplayPoint,
 918        editor_tests::init_test,
 919        inlay_hint_cache::tests::{cached_hint_labels, visible_hint_labels},
 920        test::editor_lsp_test_context::EditorLspTestContext,
 921    };
 922    use futures::StreamExt;
 923    use gpui::Modifiers;
 924    use indoc::indoc;
 925    use lsp::request::{GotoDefinition, GotoTypeDefinition};
 926    use settings::InlayHintSettingsContent;
 927    use util::{assert_set_eq, path};
 928    use workspace::item::Item;
 929
 930    #[gpui::test]
 931    async fn test_hover_type_links(cx: &mut gpui::TestAppContext) {
 932        init_test(cx, |_| {});
 933
 934        let mut cx = EditorLspTestContext::new_rust(
 935            lsp::ServerCapabilities {
 936                hover_provider: Some(lsp::HoverProviderCapability::Simple(true)),
 937                type_definition_provider: Some(lsp::TypeDefinitionProviderCapability::Simple(true)),
 938                ..Default::default()
 939            },
 940            cx,
 941        )
 942        .await;
 943
 944        cx.set_state(indoc! {"
 945            struct A;
 946            let vˇariable = A;
 947        "});
 948        let screen_coord = cx.editor(|editor, _, cx| editor.pixel_position_of_cursor(cx));
 949
 950        // Basic hold cmd+shift, expect highlight in region if response contains type definition
 951        let symbol_range = cx.lsp_range(indoc! {"
 952            struct A;
 953            let «variable» = A;
 954        "});
 955        let target_range = cx.lsp_range(indoc! {"
 956            struct «A»;
 957            let variable = A;
 958        "});
 959
 960        cx.run_until_parked();
 961
 962        let mut requests =
 963            cx.set_request_handler::<GotoTypeDefinition, _, _>(move |url, _, _| async move {
 964                Ok(Some(lsp::GotoTypeDefinitionResponse::Link(vec![
 965                    lsp::LocationLink {
 966                        origin_selection_range: Some(symbol_range),
 967                        target_uri: url.clone(),
 968                        target_range,
 969                        target_selection_range: target_range,
 970                    },
 971                ])))
 972            });
 973
 974        let modifiers = if cfg!(target_os = "macos") {
 975            Modifiers::command_shift()
 976        } else {
 977            Modifiers::control_shift()
 978        };
 979
 980        cx.simulate_mouse_move(screen_coord.unwrap(), None, modifiers);
 981
 982        requests.next().await;
 983        cx.run_until_parked();
 984        cx.assert_editor_text_highlights::<HoveredLinkState>(indoc! {"
 985            struct A;
 986            let «variable» = A;
 987        "});
 988
 989        cx.simulate_modifiers_change(Modifiers::secondary_key());
 990        cx.run_until_parked();
 991        // Assert no link highlights
 992        cx.assert_editor_text_highlights::<HoveredLinkState>(indoc! {"
 993            struct A;
 994            let variable = A;
 995        "});
 996
 997        cx.simulate_click(screen_coord.unwrap(), modifiers);
 998
 999        cx.assert_editor_state(indoc! {"
1000            struct «Aˇ»;
1001            let variable = A;
1002        "});
1003    }
1004
1005    #[gpui::test]
1006    async fn test_hover_links(cx: &mut gpui::TestAppContext) {
1007        init_test(cx, |_| {});
1008
1009        let mut cx = EditorLspTestContext::new_rust(
1010            lsp::ServerCapabilities {
1011                hover_provider: Some(lsp::HoverProviderCapability::Simple(true)),
1012                definition_provider: Some(lsp::OneOf::Left(true)),
1013                ..Default::default()
1014            },
1015            cx,
1016        )
1017        .await;
1018
1019        cx.set_state(indoc! {"
1020                fn ˇtest() { do_work(); }
1021                fn do_work() { test(); }
1022            "});
1023
1024        // Basic hold cmd, expect highlight in region if response contains definition
1025        let hover_point = cx.pixel_position(indoc! {"
1026                fn test() { do_wˇork(); }
1027                fn do_work() { test(); }
1028            "});
1029        let symbol_range = cx.lsp_range(indoc! {"
1030                fn test() { «do_work»(); }
1031                fn do_work() { test(); }
1032            "});
1033        let target_range = cx.lsp_range(indoc! {"
1034                fn test() { do_work(); }
1035                fn «do_work»() { test(); }
1036            "});
1037
1038        let mut requests =
1039            cx.set_request_handler::<GotoDefinition, _, _>(move |url, _, _| async move {
1040                Ok(Some(lsp::GotoDefinitionResponse::Link(vec![
1041                    lsp::LocationLink {
1042                        origin_selection_range: Some(symbol_range),
1043                        target_uri: url.clone(),
1044                        target_range,
1045                        target_selection_range: target_range,
1046                    },
1047                ])))
1048            });
1049
1050        cx.simulate_mouse_move(hover_point, None, Modifiers::secondary_key());
1051        requests.next().await;
1052        cx.background_executor.run_until_parked();
1053        cx.assert_editor_text_highlights::<HoveredLinkState>(indoc! {"
1054                fn test() { «do_work»(); }
1055                fn do_work() { test(); }
1056            "});
1057
1058        // Unpress cmd causes highlight to go away
1059        cx.simulate_modifiers_change(Modifiers::none());
1060        cx.assert_editor_text_highlights::<HoveredLinkState>(indoc! {"
1061                fn test() { do_work(); }
1062                fn do_work() { test(); }
1063            "});
1064
1065        let mut requests =
1066            cx.set_request_handler::<GotoDefinition, _, _>(move |url, _, _| async move {
1067                Ok(Some(lsp::GotoDefinitionResponse::Link(vec![
1068                    lsp::LocationLink {
1069                        origin_selection_range: Some(symbol_range),
1070                        target_uri: url.clone(),
1071                        target_range,
1072                        target_selection_range: target_range,
1073                    },
1074                ])))
1075            });
1076
1077        cx.simulate_mouse_move(hover_point, None, Modifiers::secondary_key());
1078        requests.next().await;
1079        cx.background_executor.run_until_parked();
1080        cx.assert_editor_text_highlights::<HoveredLinkState>(indoc! {"
1081                fn test() { «do_work»(); }
1082                fn do_work() { test(); }
1083            "});
1084
1085        // Moving mouse to location with no response dismisses highlight
1086        let hover_point = cx.pixel_position(indoc! {"
1087                fˇn test() { do_work(); }
1088                fn do_work() { test(); }
1089            "});
1090        let mut requests =
1091            cx.lsp
1092                .set_request_handler::<GotoDefinition, _, _>(move |_, _| async move {
1093                    // No definitions returned
1094                    Ok(Some(lsp::GotoDefinitionResponse::Link(vec![])))
1095                });
1096        cx.simulate_mouse_move(hover_point, None, Modifiers::secondary_key());
1097
1098        requests.next().await;
1099        cx.background_executor.run_until_parked();
1100
1101        // Assert no link highlights
1102        cx.assert_editor_text_highlights::<HoveredLinkState>(indoc! {"
1103                fn test() { do_work(); }
1104                fn do_work() { test(); }
1105            "});
1106
1107        // // Move mouse without cmd and then pressing cmd triggers highlight
1108        let hover_point = cx.pixel_position(indoc! {"
1109                fn test() { do_work(); }
1110                fn do_work() { teˇst(); }
1111            "});
1112        cx.simulate_mouse_move(hover_point, None, Modifiers::none());
1113
1114        // Assert no link highlights
1115        cx.assert_editor_text_highlights::<HoveredLinkState>(indoc! {"
1116                fn test() { do_work(); }
1117                fn do_work() { test(); }
1118            "});
1119
1120        let symbol_range = cx.lsp_range(indoc! {"
1121                fn test() { do_work(); }
1122                fn do_work() { «test»(); }
1123            "});
1124        let target_range = cx.lsp_range(indoc! {"
1125                fn «test»() { do_work(); }
1126                fn do_work() { test(); }
1127            "});
1128
1129        let mut requests =
1130            cx.set_request_handler::<GotoDefinition, _, _>(move |url, _, _| async move {
1131                Ok(Some(lsp::GotoDefinitionResponse::Link(vec![
1132                    lsp::LocationLink {
1133                        origin_selection_range: Some(symbol_range),
1134                        target_uri: url,
1135                        target_range,
1136                        target_selection_range: target_range,
1137                    },
1138                ])))
1139            });
1140
1141        cx.simulate_modifiers_change(Modifiers::secondary_key());
1142
1143        requests.next().await;
1144        cx.background_executor.run_until_parked();
1145
1146        cx.assert_editor_text_highlights::<HoveredLinkState>(indoc! {"
1147                fn test() { do_work(); }
1148                fn do_work() { «test»(); }
1149            "});
1150
1151        cx.deactivate_window();
1152        cx.assert_editor_text_highlights::<HoveredLinkState>(indoc! {"
1153                fn test() { do_work(); }
1154                fn do_work() { test(); }
1155            "});
1156
1157        cx.simulate_mouse_move(hover_point, None, Modifiers::secondary_key());
1158        cx.background_executor.run_until_parked();
1159        cx.assert_editor_text_highlights::<HoveredLinkState>(indoc! {"
1160                fn test() { do_work(); }
1161                fn do_work() { «test»(); }
1162            "});
1163
1164        // Moving again within the same symbol range doesn't re-request
1165        let hover_point = cx.pixel_position(indoc! {"
1166                fn test() { do_work(); }
1167                fn do_work() { tesˇt(); }
1168            "});
1169        cx.simulate_mouse_move(hover_point, None, Modifiers::secondary_key());
1170        cx.background_executor.run_until_parked();
1171        cx.assert_editor_text_highlights::<HoveredLinkState>(indoc! {"
1172                fn test() { do_work(); }
1173                fn do_work() { «test»(); }
1174            "});
1175
1176        // Cmd click with existing definition doesn't re-request and dismisses highlight
1177        cx.simulate_click(hover_point, Modifiers::secondary_key());
1178        cx.lsp
1179            .set_request_handler::<GotoDefinition, _, _>(move |_, _| async move {
1180                // Empty definition response to make sure we aren't hitting the lsp and using
1181                // the cached location instead
1182                Ok(Some(lsp::GotoDefinitionResponse::Link(vec![])))
1183            });
1184        cx.background_executor.run_until_parked();
1185        cx.assert_editor_state(indoc! {"
1186                fn «testˇ»() { do_work(); }
1187                fn do_work() { test(); }
1188            "});
1189
1190        // Assert no link highlights after jump
1191        cx.assert_editor_text_highlights::<HoveredLinkState>(indoc! {"
1192                fn test() { do_work(); }
1193                fn do_work() { test(); }
1194            "});
1195
1196        // Cmd click without existing definition requests and jumps
1197        let hover_point = cx.pixel_position(indoc! {"
1198                fn test() { do_wˇork(); }
1199                fn do_work() { test(); }
1200            "});
1201        let target_range = cx.lsp_range(indoc! {"
1202                fn test() { do_work(); }
1203                fn «do_work»() { test(); }
1204            "});
1205
1206        let mut requests =
1207            cx.set_request_handler::<GotoDefinition, _, _>(move |url, _, _| async move {
1208                Ok(Some(lsp::GotoDefinitionResponse::Link(vec![
1209                    lsp::LocationLink {
1210                        origin_selection_range: None,
1211                        target_uri: url,
1212                        target_range,
1213                        target_selection_range: target_range,
1214                    },
1215                ])))
1216            });
1217        cx.simulate_click(hover_point, Modifiers::secondary_key());
1218        requests.next().await;
1219        cx.background_executor.run_until_parked();
1220        cx.assert_editor_state(indoc! {"
1221                fn test() { do_work(); }
1222                fn «do_workˇ»() { test(); }
1223            "});
1224
1225        // 1. We have a pending selection, mouse point is over a symbol that we have a response for, hitting cmd and nothing happens
1226        // 2. Selection is completed, hovering
1227        let hover_point = cx.pixel_position(indoc! {"
1228                fn test() { do_wˇork(); }
1229                fn do_work() { test(); }
1230            "});
1231        let target_range = cx.lsp_range(indoc! {"
1232                fn test() { do_work(); }
1233                fn «do_work»() { test(); }
1234            "});
1235        let mut requests =
1236            cx.set_request_handler::<GotoDefinition, _, _>(move |url, _, _| async move {
1237                Ok(Some(lsp::GotoDefinitionResponse::Link(vec![
1238                    lsp::LocationLink {
1239                        origin_selection_range: None,
1240                        target_uri: url,
1241                        target_range,
1242                        target_selection_range: target_range,
1243                    },
1244                ])))
1245            });
1246
1247        // create a pending selection
1248        let selection_range = cx.ranges(indoc! {"
1249                fn «test() { do_w»ork(); }
1250                fn do_work() { test(); }
1251            "})[0]
1252            .clone();
1253        cx.update_editor(|editor, window, cx| {
1254            let snapshot = editor.buffer().read(cx).snapshot(cx);
1255            let anchor_range = snapshot.anchor_before(selection_range.start)
1256                ..snapshot.anchor_after(selection_range.end);
1257            editor.change_selections(Default::default(), window, cx, |s| {
1258                s.set_pending_anchor_range(anchor_range, crate::SelectMode::Character)
1259            });
1260        });
1261        cx.simulate_mouse_move(hover_point, None, Modifiers::secondary_key());
1262        cx.background_executor.run_until_parked();
1263        assert!(requests.try_next().is_err());
1264        cx.assert_editor_text_highlights::<HoveredLinkState>(indoc! {"
1265                fn test() { do_work(); }
1266                fn do_work() { test(); }
1267            "});
1268        cx.background_executor.run_until_parked();
1269    }
1270
1271    #[gpui::test]
1272    async fn test_inlay_hover_links(cx: &mut gpui::TestAppContext) {
1273        init_test(cx, |settings| {
1274            settings.defaults.inlay_hints = Some(InlayHintSettingsContent {
1275                enabled: Some(true),
1276                show_value_hints: Some(false),
1277                edit_debounce_ms: Some(0),
1278                scroll_debounce_ms: Some(0),
1279                show_type_hints: Some(true),
1280                show_parameter_hints: Some(true),
1281                show_other_hints: Some(true),
1282                show_background: Some(false),
1283                toggle_on_modifiers_press: None,
1284            })
1285        });
1286
1287        let mut cx = EditorLspTestContext::new_rust(
1288            lsp::ServerCapabilities {
1289                inlay_hint_provider: Some(lsp::OneOf::Left(true)),
1290                ..Default::default()
1291            },
1292            cx,
1293        )
1294        .await;
1295        cx.set_state(indoc! {"
1296                struct TestStruct;
1297
1298                fn main() {
1299                    let variableˇ = TestStruct;
1300                }
1301            "});
1302        let hint_start_offset = cx.ranges(indoc! {"
1303                struct TestStruct;
1304
1305                fn main() {
1306                    let variableˇ = TestStruct;
1307                }
1308            "})[0]
1309            .start;
1310        let hint_position = cx.to_lsp(hint_start_offset);
1311        let target_range = cx.lsp_range(indoc! {"
1312                struct «TestStruct»;
1313
1314                fn main() {
1315                    let variable = TestStruct;
1316                }
1317            "});
1318
1319        let expected_uri = cx.buffer_lsp_url.clone();
1320        let hint_label = ": TestStruct";
1321        cx.lsp
1322            .set_request_handler::<lsp::request::InlayHintRequest, _, _>(move |params, _| {
1323                let expected_uri = expected_uri.clone();
1324                async move {
1325                    assert_eq!(params.text_document.uri, expected_uri);
1326                    Ok(Some(vec![lsp::InlayHint {
1327                        position: hint_position,
1328                        label: lsp::InlayHintLabel::LabelParts(vec![lsp::InlayHintLabelPart {
1329                            value: hint_label.to_string(),
1330                            location: Some(lsp::Location {
1331                                uri: params.text_document.uri,
1332                                range: target_range,
1333                            }),
1334                            ..Default::default()
1335                        }]),
1336                        kind: Some(lsp::InlayHintKind::TYPE),
1337                        text_edits: None,
1338                        tooltip: None,
1339                        padding_left: Some(false),
1340                        padding_right: Some(false),
1341                        data: None,
1342                    }]))
1343                }
1344            })
1345            .next()
1346            .await;
1347        cx.background_executor.run_until_parked();
1348        cx.update_editor(|editor, _window, cx| {
1349            let expected_layers = vec![hint_label.to_string()];
1350            assert_eq!(expected_layers, cached_hint_labels(editor));
1351            assert_eq!(expected_layers, visible_hint_labels(editor, cx));
1352        });
1353
1354        let inlay_range = cx
1355            .ranges(indoc! {"
1356                struct TestStruct;
1357
1358                fn main() {
1359                    let variable« »= TestStruct;
1360                }
1361            "})
1362            .first()
1363            .cloned()
1364            .unwrap();
1365        let midpoint = cx.update_editor(|editor, window, cx| {
1366            let snapshot = editor.snapshot(window, cx);
1367            let previous_valid = inlay_range.start.to_display_point(&snapshot);
1368            let next_valid = inlay_range.end.to_display_point(&snapshot);
1369            assert_eq!(previous_valid.row(), next_valid.row());
1370            assert!(previous_valid.column() < next_valid.column());
1371            DisplayPoint::new(
1372                previous_valid.row(),
1373                previous_valid.column() + (hint_label.len() / 2) as u32,
1374            )
1375        });
1376        // Press cmd to trigger highlight
1377        let hover_point = cx.pixel_position_for(midpoint);
1378        cx.simulate_mouse_move(hover_point, None, Modifiers::secondary_key());
1379        cx.background_executor.run_until_parked();
1380        cx.update_editor(|editor, window, cx| {
1381            let snapshot = editor.snapshot(window, cx);
1382            let actual_highlights = snapshot
1383                .inlay_highlights::<HoveredLinkState>()
1384                .into_iter()
1385                .flat_map(|highlights| highlights.values().map(|(_, highlight)| highlight))
1386                .collect::<Vec<_>>();
1387
1388            let buffer_snapshot = editor.buffer().update(cx, |buffer, cx| buffer.snapshot(cx));
1389            let expected_highlight = InlayHighlight {
1390                inlay: InlayId::Hint(0),
1391                inlay_position: buffer_snapshot.anchor_after(inlay_range.start),
1392                range: 0..hint_label.len(),
1393            };
1394            assert_set_eq!(actual_highlights, vec![&expected_highlight]);
1395        });
1396
1397        cx.simulate_mouse_move(hover_point, None, Modifiers::none());
1398        // Assert no link highlights
1399        cx.update_editor(|editor, window, cx| {
1400                let snapshot = editor.snapshot(window, cx);
1401                let actual_ranges = snapshot
1402                    .text_highlight_ranges::<HoveredLinkState>()
1403                    .map(|ranges| ranges.as_ref().clone().1)
1404                    .unwrap_or_default();
1405
1406                assert!(actual_ranges.is_empty(), "When no cmd is pressed, should have no hint label selected, but got: {actual_ranges:?}");
1407            });
1408
1409        cx.simulate_modifiers_change(Modifiers::secondary_key());
1410        cx.background_executor.run_until_parked();
1411        cx.simulate_click(hover_point, Modifiers::secondary_key());
1412        cx.background_executor.run_until_parked();
1413        cx.assert_editor_state(indoc! {"
1414                struct «TestStructˇ»;
1415
1416                fn main() {
1417                    let variable = TestStruct;
1418                }
1419            "});
1420    }
1421
1422    #[gpui::test]
1423    async fn test_urls(cx: &mut gpui::TestAppContext) {
1424        init_test(cx, |_| {});
1425        let mut cx = EditorLspTestContext::new_rust(
1426            lsp::ServerCapabilities {
1427                ..Default::default()
1428            },
1429            cx,
1430        )
1431        .await;
1432
1433        cx.set_state(indoc! {"
1434            Let's test a [complex](https://zed.dev/channel/had-(oops)) caseˇ.
1435        "});
1436
1437        let screen_coord = cx.pixel_position(indoc! {"
1438            Let's test a [complex](https://zed.dev/channel/had-(ˇoops)) case.
1439            "});
1440
1441        cx.simulate_mouse_move(screen_coord, None, Modifiers::secondary_key());
1442        cx.assert_editor_text_highlights::<HoveredLinkState>(indoc! {"
1443            Let's test a [complex](«https://zed.dev/channel/had-(oops)ˇ») case.
1444        "});
1445
1446        cx.simulate_click(screen_coord, Modifiers::secondary_key());
1447        assert_eq!(
1448            cx.opened_url(),
1449            Some("https://zed.dev/channel/had-(oops)".into())
1450        );
1451    }
1452
1453    #[gpui::test]
1454    async fn test_urls_at_beginning_of_buffer(cx: &mut gpui::TestAppContext) {
1455        init_test(cx, |_| {});
1456        let mut cx = EditorLspTestContext::new_rust(
1457            lsp::ServerCapabilities {
1458                ..Default::default()
1459            },
1460            cx,
1461        )
1462        .await;
1463
1464        cx.set_state(indoc! {"https://zed.dev/releases is a cool ˇwebpage."});
1465
1466        let screen_coord =
1467            cx.pixel_position(indoc! {"https://zed.dev/relˇeases is a cool webpage."});
1468
1469        cx.simulate_mouse_move(screen_coord, None, Modifiers::secondary_key());
1470        cx.assert_editor_text_highlights::<HoveredLinkState>(
1471            indoc! {"«https://zed.dev/releasesˇ» is a cool webpage."},
1472        );
1473
1474        cx.simulate_click(screen_coord, Modifiers::secondary_key());
1475        assert_eq!(cx.opened_url(), Some("https://zed.dev/releases".into()));
1476    }
1477
1478    #[gpui::test]
1479    async fn test_urls_at_end_of_buffer(cx: &mut gpui::TestAppContext) {
1480        init_test(cx, |_| {});
1481        let mut cx = EditorLspTestContext::new_rust(
1482            lsp::ServerCapabilities {
1483                ..Default::default()
1484            },
1485            cx,
1486        )
1487        .await;
1488
1489        cx.set_state(indoc! {"A cool ˇwebpage is https://zed.dev/releases"});
1490
1491        let screen_coord =
1492            cx.pixel_position(indoc! {"A cool webpage is https://zed.dev/releˇases"});
1493
1494        cx.simulate_mouse_move(screen_coord, None, Modifiers::secondary_key());
1495        cx.assert_editor_text_highlights::<HoveredLinkState>(
1496            indoc! {"A cool webpage is «https://zed.dev/releasesˇ»"},
1497        );
1498
1499        cx.simulate_click(screen_coord, Modifiers::secondary_key());
1500        assert_eq!(cx.opened_url(), Some("https://zed.dev/releases".into()));
1501    }
1502
1503    #[gpui::test]
1504    async fn test_surrounding_filename(cx: &mut gpui::TestAppContext) {
1505        init_test(cx, |_| {});
1506        let mut cx = EditorLspTestContext::new_rust(
1507            lsp::ServerCapabilities {
1508                ..Default::default()
1509            },
1510            cx,
1511        )
1512        .await;
1513
1514        let test_cases = [
1515            ("file ˇ name", None),
1516            ("ˇfile name", Some("file")),
1517            ("file ˇname", Some("name")),
1518            ("fiˇle name", Some("file")),
1519            ("filenˇame", Some("filename")),
1520            // Absolute path
1521            ("foobar ˇ/home/user/f.txt", Some("/home/user/f.txt")),
1522            ("foobar /home/useˇr/f.txt", Some("/home/user/f.txt")),
1523            // Windows
1524            ("C:\\Useˇrs\\user\\f.txt", Some("C:\\Users\\user\\f.txt")),
1525            // Whitespace
1526            ("ˇfile\\ -\\ name.txt", Some("file - name.txt")),
1527            ("file\\ -\\ naˇme.txt", Some("file - name.txt")),
1528            // Tilde
1529            ("ˇ~/file.txt", Some("~/file.txt")),
1530            ("~/fiˇle.txt", Some("~/file.txt")),
1531            // Double quotes
1532            ("\"fˇile.txt\"", Some("file.txt")),
1533            ("ˇ\"file.txt\"", Some("file.txt")),
1534            ("ˇ\"fi\\ le.txt\"", Some("fi le.txt")),
1535            // Single quotes
1536            ("'fˇile.txt'", Some("file.txt")),
1537            ("ˇ'file.txt'", Some("file.txt")),
1538            ("ˇ'fi\\ le.txt'", Some("fi le.txt")),
1539            // Quoted multibyte characters
1540            (" ˇ\"\"", Some("")),
1541            (" \"ˇ常\"", Some("")),
1542            ("ˇ\"\"", Some("")),
1543        ];
1544
1545        for (input, expected) in test_cases {
1546            cx.set_state(input);
1547
1548            let (position, snapshot) = cx.editor(|editor, _, cx| {
1549                let positions = editor.selections.newest_anchor().head().text_anchor;
1550                let snapshot = editor
1551                    .buffer()
1552                    .clone()
1553                    .read(cx)
1554                    .as_singleton()
1555                    .unwrap()
1556                    .read(cx)
1557                    .snapshot();
1558                (positions, snapshot)
1559            });
1560
1561            let result = surrounding_filename(snapshot, position);
1562
1563            if let Some(expected) = expected {
1564                assert!(result.is_some(), "Failed to find file path: {}", input);
1565                let (_, path) = result.unwrap();
1566                assert_eq!(&path, expected, "Incorrect file path for input: {}", input);
1567            } else {
1568                assert!(
1569                    result.is_none(),
1570                    "Expected no result, but got one: {:?}",
1571                    result
1572                );
1573            }
1574        }
1575    }
1576
1577    #[gpui::test]
1578    async fn test_hover_filenames(cx: &mut gpui::TestAppContext) {
1579        init_test(cx, |_| {});
1580        let mut cx = EditorLspTestContext::new_rust(
1581            lsp::ServerCapabilities {
1582                ..Default::default()
1583            },
1584            cx,
1585        )
1586        .await;
1587
1588        // Insert a new file
1589        let fs = cx.update_workspace(|workspace, _, cx| workspace.project().read(cx).fs().clone());
1590        fs.as_fake()
1591            .insert_file(
1592                path!("/root/dir/file2.rs"),
1593                "This is file2.rs".as_bytes().to_vec(),
1594            )
1595            .await;
1596
1597        #[cfg(not(target_os = "windows"))]
1598        cx.set_state(indoc! {"
1599            You can't go to a file that does_not_exist.txt.
1600            Go to file2.rs if you want.
1601            Or go to ../dir/file2.rs if you want.
1602            Or go to /root/dir/file2.rs if project is local.
1603            Or go to /root/dir/file2 if this is a Rust file.ˇ
1604            "});
1605        #[cfg(target_os = "windows")]
1606        cx.set_state(indoc! {"
1607            You can't go to a file that does_not_exist.txt.
1608            Go to file2.rs if you want.
1609            Or go to ../dir/file2.rs if you want.
1610            Or go to C:/root/dir/file2.rs if project is local.
1611            Or go to C:/root/dir/file2 if this is a Rust file.ˇ
1612        "});
1613
1614        // File does not exist
1615        #[cfg(not(target_os = "windows"))]
1616        let screen_coord = cx.pixel_position(indoc! {"
1617            You can't go to a file that dˇoes_not_exist.txt.
1618            Go to file2.rs if you want.
1619            Or go to ../dir/file2.rs if you want.
1620            Or go to /root/dir/file2.rs if project is local.
1621            Or go to /root/dir/file2 if this is a Rust file.
1622        "});
1623        #[cfg(target_os = "windows")]
1624        let screen_coord = cx.pixel_position(indoc! {"
1625            You can't go to a file that dˇoes_not_exist.txt.
1626            Go to file2.rs if you want.
1627            Or go to ../dir/file2.rs if you want.
1628            Or go to C:/root/dir/file2.rs if project is local.
1629            Or go to C:/root/dir/file2 if this is a Rust file.
1630        "});
1631        cx.simulate_mouse_move(screen_coord, None, Modifiers::secondary_key());
1632        // No highlight
1633        cx.update_editor(|editor, window, cx| {
1634            assert!(
1635                editor
1636                    .snapshot(window, cx)
1637                    .text_highlight_ranges::<HoveredLinkState>()
1638                    .unwrap_or_default()
1639                    .1
1640                    .is_empty()
1641            );
1642        });
1643
1644        // Moving the mouse over a file that does exist should highlight it.
1645        #[cfg(not(target_os = "windows"))]
1646        let screen_coord = cx.pixel_position(indoc! {"
1647            You can't go to a file that does_not_exist.txt.
1648            Go to fˇile2.rs if you want.
1649            Or go to ../dir/file2.rs if you want.
1650            Or go to /root/dir/file2.rs if project is local.
1651            Or go to /root/dir/file2 if this is a Rust file.
1652        "});
1653        #[cfg(target_os = "windows")]
1654        let screen_coord = cx.pixel_position(indoc! {"
1655            You can't go to a file that does_not_exist.txt.
1656            Go to fˇile2.rs if you want.
1657            Or go to ../dir/file2.rs if you want.
1658            Or go to C:/root/dir/file2.rs if project is local.
1659            Or go to C:/root/dir/file2 if this is a Rust file.
1660        "});
1661
1662        cx.simulate_mouse_move(screen_coord, None, Modifiers::secondary_key());
1663        #[cfg(not(target_os = "windows"))]
1664        cx.assert_editor_text_highlights::<HoveredLinkState>(indoc! {"
1665            You can't go to a file that does_not_exist.txt.
1666            Go to «file2.rsˇ» if you want.
1667            Or go to ../dir/file2.rs if you want.
1668            Or go to /root/dir/file2.rs if project is local.
1669            Or go to /root/dir/file2 if this is a Rust file.
1670        "});
1671        #[cfg(target_os = "windows")]
1672        cx.assert_editor_text_highlights::<HoveredLinkState>(indoc! {"
1673            You can't go to a file that does_not_exist.txt.
1674            Go to «file2.rsˇ» if you want.
1675            Or go to ../dir/file2.rs if you want.
1676            Or go to C:/root/dir/file2.rs if project is local.
1677            Or go to C:/root/dir/file2 if this is a Rust file.
1678        "});
1679
1680        // Moving the mouse over a relative path that does exist should highlight it
1681        #[cfg(not(target_os = "windows"))]
1682        let screen_coord = cx.pixel_position(indoc! {"
1683            You can't go to a file that does_not_exist.txt.
1684            Go to file2.rs if you want.
1685            Or go to ../dir/fˇile2.rs if you want.
1686            Or go to /root/dir/file2.rs if project is local.
1687            Or go to /root/dir/file2 if this is a Rust file.
1688        "});
1689        #[cfg(target_os = "windows")]
1690        let screen_coord = cx.pixel_position(indoc! {"
1691            You can't go to a file that does_not_exist.txt.
1692            Go to file2.rs if you want.
1693            Or go to ../dir/fˇile2.rs if you want.
1694            Or go to C:/root/dir/file2.rs if project is local.
1695            Or go to C:/root/dir/file2 if this is a Rust file.
1696        "});
1697
1698        cx.simulate_mouse_move(screen_coord, None, Modifiers::secondary_key());
1699        #[cfg(not(target_os = "windows"))]
1700        cx.assert_editor_text_highlights::<HoveredLinkState>(indoc! {"
1701            You can't go to a file that does_not_exist.txt.
1702            Go to file2.rs if you want.
1703            Or go to «../dir/file2.rsˇ» if you want.
1704            Or go to /root/dir/file2.rs if project is local.
1705            Or go to /root/dir/file2 if this is a Rust file.
1706        "});
1707        #[cfg(target_os = "windows")]
1708        cx.assert_editor_text_highlights::<HoveredLinkState>(indoc! {"
1709            You can't go to a file that does_not_exist.txt.
1710            Go to file2.rs if you want.
1711            Or go to «../dir/file2.rsˇ» if you want.
1712            Or go to C:/root/dir/file2.rs if project is local.
1713            Or go to C:/root/dir/file2 if this is a Rust file.
1714        "});
1715
1716        // Moving the mouse over an absolute path that does exist should highlight it
1717        #[cfg(not(target_os = "windows"))]
1718        let screen_coord = cx.pixel_position(indoc! {"
1719            You can't go to a file that does_not_exist.txt.
1720            Go to file2.rs if you want.
1721            Or go to ../dir/file2.rs if you want.
1722            Or go to /root/diˇr/file2.rs if project is local.
1723            Or go to /root/dir/file2 if this is a Rust file.
1724        "});
1725
1726        #[cfg(target_os = "windows")]
1727        let screen_coord = cx.pixel_position(indoc! {"
1728            You can't go to a file that does_not_exist.txt.
1729            Go to file2.rs if you want.
1730            Or go to ../dir/file2.rs if you want.
1731            Or go to C:/root/diˇr/file2.rs if project is local.
1732            Or go to C:/root/dir/file2 if this is a Rust file.
1733        "});
1734
1735        cx.simulate_mouse_move(screen_coord, None, Modifiers::secondary_key());
1736        #[cfg(not(target_os = "windows"))]
1737        cx.assert_editor_text_highlights::<HoveredLinkState>(indoc! {"
1738            You can't go to a file that does_not_exist.txt.
1739            Go to file2.rs if you want.
1740            Or go to ../dir/file2.rs if you want.
1741            Or go to «/root/dir/file2.rsˇ» if project is local.
1742            Or go to /root/dir/file2 if this is a Rust file.
1743        "});
1744        #[cfg(target_os = "windows")]
1745        cx.assert_editor_text_highlights::<HoveredLinkState>(indoc! {"
1746            You can't go to a file that does_not_exist.txt.
1747            Go to file2.rs if you want.
1748            Or go to ../dir/file2.rs if you want.
1749            Or go to «C:/root/dir/file2.rsˇ» if project is local.
1750            Or go to C:/root/dir/file2 if this is a Rust file.
1751        "});
1752
1753        // Moving the mouse over a path that exists, if we add the language-specific suffix, it should highlight it
1754        #[cfg(not(target_os = "windows"))]
1755        let screen_coord = cx.pixel_position(indoc! {"
1756            You can't go to a file that does_not_exist.txt.
1757            Go to file2.rs if you want.
1758            Or go to ../dir/file2.rs if you want.
1759            Or go to /root/dir/file2.rs if project is local.
1760            Or go to /root/diˇr/file2 if this is a Rust file.
1761        "});
1762        #[cfg(target_os = "windows")]
1763        let screen_coord = cx.pixel_position(indoc! {"
1764            You can't go to a file that does_not_exist.txt.
1765            Go to file2.rs if you want.
1766            Or go to ../dir/file2.rs if you want.
1767            Or go to C:/root/dir/file2.rs if project is local.
1768            Or go to C:/root/diˇr/file2 if this is a Rust file.
1769        "});
1770
1771        cx.simulate_mouse_move(screen_coord, None, Modifiers::secondary_key());
1772        #[cfg(not(target_os = "windows"))]
1773        cx.assert_editor_text_highlights::<HoveredLinkState>(indoc! {"
1774            You can't go to a file that does_not_exist.txt.
1775            Go to file2.rs if you want.
1776            Or go to ../dir/file2.rs if you want.
1777            Or go to /root/dir/file2.rs if project is local.
1778            Or go to «/root/dir/file2ˇ» if this is a Rust file.
1779        "});
1780        #[cfg(target_os = "windows")]
1781        cx.assert_editor_text_highlights::<HoveredLinkState>(indoc! {"
1782            You can't go to a file that does_not_exist.txt.
1783            Go to file2.rs if you want.
1784            Or go to ../dir/file2.rs if you want.
1785            Or go to C:/root/dir/file2.rs if project is local.
1786            Or go to «C:/root/dir/file2ˇ» if this is a Rust file.
1787        "});
1788
1789        cx.simulate_click(screen_coord, Modifiers::secondary_key());
1790
1791        cx.update_workspace(|workspace, _, cx| assert_eq!(workspace.items(cx).count(), 2));
1792        cx.update_workspace(|workspace, _, cx| {
1793            let active_editor = workspace.active_item_as::<Editor>(cx).unwrap();
1794
1795            let buffer = active_editor
1796                .read(cx)
1797                .buffer()
1798                .read(cx)
1799                .as_singleton()
1800                .unwrap();
1801
1802            let file = buffer.read(cx).file().unwrap();
1803            let file_path = file.as_local().unwrap().abs_path(cx);
1804
1805            assert_eq!(
1806                file_path,
1807                std::path::PathBuf::from(path!("/root/dir/file2.rs"))
1808            );
1809        });
1810    }
1811
1812    #[gpui::test]
1813    async fn test_hover_directories(cx: &mut gpui::TestAppContext) {
1814        init_test(cx, |_| {});
1815        let mut cx = EditorLspTestContext::new_rust(
1816            lsp::ServerCapabilities {
1817                ..Default::default()
1818            },
1819            cx,
1820        )
1821        .await;
1822
1823        // Insert a new file
1824        let fs = cx.update_workspace(|workspace, _, cx| workspace.project().read(cx).fs().clone());
1825        fs.as_fake()
1826            .insert_file("/root/dir/file2.rs", "This is file2.rs".as_bytes().to_vec())
1827            .await;
1828
1829        cx.set_state(indoc! {"
1830            You can't open ../diˇr because it's a directory.
1831        "});
1832
1833        // File does not exist
1834        let screen_coord = cx.pixel_position(indoc! {"
1835            You can't open ../diˇr because it's a directory.
1836        "});
1837        cx.simulate_mouse_move(screen_coord, None, Modifiers::secondary_key());
1838
1839        // No highlight
1840        cx.update_editor(|editor, window, cx| {
1841            assert!(
1842                editor
1843                    .snapshot(window, cx)
1844                    .text_highlight_ranges::<HoveredLinkState>()
1845                    .unwrap_or_default()
1846                    .1
1847                    .is_empty()
1848            );
1849        });
1850
1851        // Does not open the directory
1852        cx.simulate_click(screen_coord, Modifiers::secondary_key());
1853        cx.update_workspace(|workspace, _, cx| assert_eq!(workspace.items(cx).count(), 1));
1854    }
1855
1856    #[gpui::test]
1857    async fn test_hover_unicode(cx: &mut gpui::TestAppContext) {
1858        init_test(cx, |_| {});
1859        let mut cx = EditorLspTestContext::new_rust(
1860            lsp::ServerCapabilities {
1861                ..Default::default()
1862            },
1863            cx,
1864        )
1865        .await;
1866
1867        cx.set_state(indoc! {"
1868            You can't open ˇ\"🤩\" because it's an emoji.
1869        "});
1870
1871        // File does not exist
1872        let screen_coord = cx.pixel_position(indoc! {"
1873            You can't open ˇ\"🤩\" because it's an emoji.
1874        "});
1875        cx.simulate_mouse_move(screen_coord, None, Modifiers::secondary_key());
1876
1877        // No highlight, does not panic...
1878        cx.update_editor(|editor, window, cx| {
1879            assert!(
1880                editor
1881                    .snapshot(window, cx)
1882                    .text_highlight_ranges::<HoveredLinkState>()
1883                    .unwrap_or_default()
1884                    .1
1885                    .is_empty()
1886            );
1887        });
1888
1889        // Does not open the directory
1890        cx.simulate_click(screen_coord, Modifiers::secondary_key());
1891        cx.update_workspace(|workspace, _, cx| assert_eq!(workspace.items(cx).count(), 1));
1892    }
1893}