From 3869d7713e2dfd2621f7e5a656ebac0b13d10542 Mon Sep 17 00:00:00 2001
From: Jan Hrastnik <jan.hrastnik2@gmail.com>
Date: Sun, 7 Mar 2021 19:41:49 +0100
Subject: [PATCH] added goto functions in helix-term

---
 Cargo.lock                 |  1 +
 helix-term/src/commands.rs | 97 +++++++++++++++++++++++++++++---------
 helix-view/src/document.rs |  2 +-
 3 files changed, 76 insertions(+), 24 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index 5fac3391..ac1f172a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -550,6 +550,7 @@ dependencies = [
  "helix-view",
  "ignore",
  "log",
+ "lsp-types",
  "num_cpus",
  "once_cell",
  "pulldown-cmark",
diff --git a/helix-term/src/commands.rs b/helix-term/src/commands.rs
index 9b48e803..87d7ea79 100644
--- a/helix-term/src/commands.rs
+++ b/helix-term/src/commands.rs
@@ -13,6 +13,11 @@ use once_cell::sync::Lazy;
 use crate::compositor::Compositor;
 use crate::ui::{self, Popup, Prompt, PromptEvent};
 
+use lsp_types as lsp;
+use std::path::PathBuf;
+
+use smol::Executor;
+
 use helix_view::{
     document::Mode,
     view::{View, PADDING},
@@ -846,34 +851,13 @@ pub fn exit_select_mode(cx: &mut Context) {
     cx.doc().mode = Mode::Normal;
 }
 
-pub fn goto_definition(cx: &mut Context) {
+pub fn goto_generic(cx: &mut Context, res: Vec<lsp::Location>) {
     let doc = cx.doc();
 
-    let language_server = match doc.language_server.as_ref() {
-        Some(language_server) => language_server,
-        None => return,
-    };
-
-    // TODO: blocking here is not ideal
-    let pos = helix_lsp::util::pos_to_lsp_pos(doc.text().slice(..), doc.selection().cursor());
-
-    // TODO: handle fails
-    let res =
-        smol::block_on(language_server.goto_definition(doc.identifier(), pos)).unwrap_or_default();
-
-    /*
-    if res.len() == 1 {
-        let definition_pos = res.get(0).unwrap().range.start;
-        let new_pos = helix_lsp::util::lsp_pos_to_pos(doc.text().slice(..), definition_pos);
-        doc.set_selection(Selection::point(new_pos));
-    } else {
-        // show menu picker i guess
-    }*/
-
     doc.mode = Mode::Normal;
 
     log::info!("{:?}", res);
-    let filepath = doc.path.clone().unwrap();
+    let filepath = doc.path().unwrap();
     log::info!("{:?}", filepath);
 
     match &res.as_slice() {
@@ -884,6 +868,9 @@ pub fn goto_definition(cx: &mut Context) {
                 doc.set_selection(Selection::point(new_pos));
             } else {
                 // open new file
+                cx.editor
+                    .open(PathBuf::from(location.uri.path()), cx.executor);
+                // TODO: go to position
             }
         }
         [] => (), // maybe show user message that no definition was found?
@@ -907,6 +894,70 @@ pub fn goto_definition(cx: &mut Context) {
     }
 }
 
+pub fn goto_definition(cx: &mut Context) {
+    let doc = cx.doc();
+    let language_server = match doc.language_server.as_ref() {
+        Some(language_server) => language_server,
+        None => return,
+    };
+
+    // TODO: blocking here is not ideal
+    let pos = helix_lsp::util::pos_to_lsp_pos(doc.text().slice(..), doc.selection().cursor());
+
+    // TODO: handle fails
+    let res =
+        smol::block_on(language_server.goto_definition(doc.identifier(), pos)).unwrap_or_default();
+    goto_generic(cx, res);
+}
+
+pub fn goto_type_definition(cx: &mut Context) {
+    let doc = cx.doc();
+    let language_server = match doc.language_server.as_ref() {
+        Some(language_server) => language_server,
+        None => return,
+    };
+
+    // TODO: blocking here is not ideal
+    let pos = helix_lsp::util::pos_to_lsp_pos(doc.text().slice(..), doc.selection().cursor());
+
+    // TODO: handle fails
+    let res = smol::block_on(language_server.goto_type_definition(doc.identifier(), pos))
+        .unwrap_or_default();
+    goto_generic(cx, res);
+}
+
+pub fn goto_implementation(cx: &mut Context) {
+    let doc = cx.doc();
+    let language_server = match doc.language_server.as_ref() {
+        Some(language_server) => language_server,
+        None => return,
+    };
+
+    // TODO: blocking here is not ideal
+    let pos = helix_lsp::util::pos_to_lsp_pos(doc.text().slice(..), doc.selection().cursor());
+
+    // TODO: handle fails
+    let res = smol::block_on(language_server.goto_implementation(doc.identifier(), pos))
+        .unwrap_or_default();
+    goto_generic(cx, res);
+}
+
+pub fn goto_reference(cx: &mut Context) {
+    let doc = cx.doc();
+    let language_server = match doc.language_server.as_ref() {
+        Some(language_server) => language_server,
+        None => return,
+    };
+
+    // TODO: blocking here is not ideal
+    let pos = helix_lsp::util::pos_to_lsp_pos(doc.text().slice(..), doc.selection().cursor());
+
+    // TODO: handle fails
+    let res =
+        smol::block_on(language_server.goto_reference(doc.identifier(), pos)).unwrap_or_default();
+    goto_generic(cx, res);
+}
+
 // NOTE: Transactions in this module get appended to history when we switch back to normal mode.
 pub mod insert {
     use super::*;
diff --git a/helix-view/src/document.rs b/helix-view/src/document.rs
index 9ec70023..82258bde 100644
--- a/helix-view/src/document.rs
+++ b/helix-view/src/document.rs
@@ -19,7 +19,7 @@ pub enum Mode {
 pub struct Document {
     pub state: State, // rope + selection
     /// File path on disk.
-    pub path: Option<PathBuf>, // pub for testing
+    path: Option<PathBuf>,
 
     /// Current editing mode.
     pub mode: Mode,