Add block selection

This implements a block selection mode which can be triggered by holding
Control before starting a selection.

If text is copied using this block selection, newlines will be
automatically added to the end of the lines.

This fixes #526.

1 files changed, 8 insertions, 1 deletions

diff --git a/alacritty_terminal/src/input.rs b/alacritty_terminal/src/input.rs
index 17d427cd..b4ea5910 100644
--- a/alacritty_terminal/src/input.rs
+++ b/alacritty_terminal/src/input.rs
@@ -66,6 +66,7 @@ pub trait ActionContext {
     fn clear_selection(&mut self);
     fn update_selection(&mut self, point: Point, side: Side);
     fn simple_selection(&mut self, point: Point, side: Side);
+    fn block_selection(&mut self, point: Point, side: Side);
     fn semantic_selection(&mut self, point: Point);
     fn line_selection(&mut self, point: Point);
     fn selection_is_empty(&self) -> bool;
@@ -612,7 +613,11 @@ impl<'a, A: ActionContext + 'a> Processor<'a, A> {
                 // Start new empty selection
                 let side = self.ctx.mouse().cell_side;
                 if let Some(point) = point {
-                    self.ctx.simple_selection(point, side);
+                    if modifiers.ctrl {
+                        self.ctx.block_selection(point, side);
+                    } else {
+                        self.ctx.simple_selection(point, side);
+                    }
                 }
 
                 let report_modes =
@@ -991,6 +996,8 @@ mod tests {
 
         fn simple_selection(&mut self, _point: Point, _side: Side) {}
 
+        fn block_selection(&mut self, _point: Point, _side: Side) {}
+
         fn copy_selection(&mut self, _: ClipboardType) {}
 
         fn clear_selection(&mut self) {}