Trim \n from hints/semantic-/simple selection

Before this patch a hint regex ending in the last column would append a
newline, despite this newline being "invisible" to the user. To match
the expected behavior, newlines are trimmed from regex hint matches.

To ensure consistency the simple and semantic selection also do not
include a newline at the end of the copied text anymore.

Fixes #5697.

2 files changed, 24 insertions, 17 deletions

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6c44ac27..8af6f2a1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -26,6 +26,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Strip trailing whitespaces when yanking from a block selection
 - Display area keeps history position when viewport is cleared
 - Commands spawn from the current directory of the foreground shell in Unix-like systems
+- Remove trailing newline from strings taken from hints or simple/semantic selections
 
 ### Fixed
 
diff --git a/alacritty_terminal/src/term/mod.rs b/alacritty_terminal/src/term/mod.rs
index c7c461f4..ef71f6f1 100644
--- a/alacritty_terminal/src/term/mod.rs
+++ b/alacritty_terminal/src/term/mod.rs
@@ -17,7 +17,7 @@ use crate::config::Config;
 use crate::event::{Event, EventListener};
 use crate::grid::{Dimensions, Grid, GridIterator, Scroll};
 use crate::index::{self, Boundary, Column, Direction, Line, Point, Side};
-use crate::selection::{Selection, SelectionRange};
+use crate::selection::{Selection, SelectionRange, SelectionType};
 use crate::term::cell::{Cell, Flags, LineLength};
 use crate::term::color::{Colors, Rgb};
 use crate::vi_mode::{ViModeCursor, ViMotion};
@@ -348,24 +348,30 @@ impl<T> Term<T> {
     /// Convert the active selection to a String.
     pub fn selection_to_string(&self) -> Option<String> {
         let selection_range = self.selection.as_ref().and_then(|s| s.to_range(self))?;
-        let SelectionRange { start, end, is_block } = selection_range;
+        let SelectionRange { start, end, .. } = selection_range;
 
         let mut res = String::new();
 
-        if is_block {
-            for line in (start.line.0..end.line.0).map(Line::from) {
-                res += self
-                    .line_to_string(line, start.column..end.column, start.column.0 != 0)
-                    .trim_end();
-
-                // If the last column is included, newline is appended automatically.
-                if end.column != self.columns() - 1 {
-                    res += "\n";
+        match self.selection.as_ref() {
+            Some(Selection { ty: SelectionType::Block, .. }) => {
+                for line in (start.line.0..end.line.0).map(Line::from) {
+                    res += self
+                        .line_to_string(line, start.column..end.column, start.column.0 != 0)
+                        .trim_end();
+
+                    // If the last column is included, newline is appended automatically.
+                    if end.column != self.columns() - 1 {
+                        res += "\n";
+                    }
                 }
-            }
-            res += self.line_to_string(end.line, start.column..end.column, true).trim_end();
-        } else {
-            res = self.bounds_to_string(start, end);
+                res += self.line_to_string(end.line, start.column..end.column, true).trim_end();
+            },
+            Some(Selection { ty: SelectionType::Lines, .. }) => {
+                res = self.bounds_to_string(start, end) + "\n";
+            },
+            _ => {
+                res = self.bounds_to_string(start, end);
+            },
         }
 
         Some(res)
@@ -382,7 +388,7 @@ impl<T> Term<T> {
             res += &self.line_to_string(line, start_col..end_col, line == end.line);
         }
 
-        res
+        res.strip_suffix('\n').map(str::to_owned).unwrap_or(res)
     }
 
     /// Convert a single line in the grid to a String.
@@ -2103,7 +2109,7 @@ mod tests {
         );
         selection.update(Point { line: Line(2), column: Column(2) }, Side::Right);
         term.selection = Some(selection);
-        assert_eq!(term.selection_to_string(), Some("aaa\n\naaa\n".into()));
+        assert_eq!(term.selection_to_string(), Some("aaa\n\naaa".into()));
     }
 
     /// Check that the grid can be serialized back and forth losslessly.