From d0b0c9b2ef1f26dbf7e5addf59d73b9634907af2 Mon Sep 17 00:00:00 2001
From: Dmitry Sharshakov <d3dx12.xx@gmail.com>
Date: Sun, 22 Aug 2021 12:06:43 +0300
Subject: [PATCH] editor: select a range if stack pointer has an end

---
 Cargo.lock                    |  1 +
 helix-term/Cargo.toml         |  2 ++
 helix-term/src/application.rs | 21 +++++++++++++++++----
 3 files changed, 20 insertions(+), 4 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index 2c9d1f31..57ddb01c 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -388,6 +388,7 @@ dependencies = [
  "serde_json",
  "signal-hook",
  "signal-hook-tokio",
+ "smallvec",
  "tokio",
  "tokio-stream",
  "toml",
diff --git a/helix-term/Cargo.toml b/helix-term/Cargo.toml
index c0b2cfe5..63856585 100644
--- a/helix-term/Cargo.toml
+++ b/helix-term/Cargo.toml
@@ -56,5 +56,7 @@ toml = "0.5"
 serde_json = "1.0"
 serde = { version = "1.0", features = ["derive"] }
 
+smallvec = "1.4"
+
 [target.'cfg(not(windows))'.dependencies]  # https://github.com/vorner/signal-hook/issues/100
 signal-hook-tokio = { version = "0.3", features = ["futures-v0_3"] }
diff --git a/helix-term/src/application.rs b/helix-term/src/application.rs
index 0d10c9b5..6579cb51 100644
--- a/helix-term/src/application.rs
+++ b/helix-term/src/application.rs
@@ -1,4 +1,4 @@
-use helix_core::{syntax, Selection};
+use helix_core::{syntax, Range, Selection};
 use helix_dap::Payload;
 use helix_lsp::{lsp, util::lsp_pos_to_pos, LspProgressMap};
 use helix_view::{theme, Editor};
@@ -13,7 +13,7 @@ use crate::{
 };
 
 use log::error;
-
+use smallvec::smallvec;
 use std::{
     io::{stdout, Write},
     sync::Arc,
@@ -309,19 +309,32 @@ impl Application {
                             }),
                         line,
                         column,
+                        end_line,
+                        end_column,
                         ..
                     }) = &debugger.stack_pointer
                     {
                         let path = src.clone();
                         let line = *line;
                         let column = *column;
+                        let end_line = *end_line;
+                        let end_column = *end_column;
                         self.editor
                             .open(path, helix_view::editor::Action::Replace)
                             .unwrap();
 
                         let (view, doc) = current!(self.editor);
-                        let pos = doc.text().line_to_char(line - 1) + column;
-                        doc.set_selection(view.id, Selection::point(pos));
+                        let start = doc.text().line_to_char(line - 1) + column;
+                        if let Some(end_line) = end_line {
+                            let end =
+                                doc.text().line_to_char(end_line - 1) + end_column.unwrap_or(0);
+                            doc.set_selection(
+                                view.id,
+                                Selection::new(smallvec![Range::new(start, end)], 0),
+                            );
+                        } else {
+                            doc.set_selection(view.id, Selection::point(start));
+                        }
                         align_view(doc, view, Align::Center);
                     }
                     self.editor.set_status(status);