Fix selection starting inside padding

This fixes #2109.

CHANGELOG.md

@@ -21,6 +21,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Cursor jumping around when leaving alt screen while not in the alt screen
 - Text lingering around when resetting while scrolled up in the history
 - Terminfo support for extended capabilities
+- Allow mouse presses and beginning of mouse selection in padding
 
 ## Version 0.2.9
 

src/input.rs

@@ -411,7 +411,7 @@ impl<'a, A: ActionContext + 'a> Processor<'a, A> {
         } else if self.ctx.terminal().mode().intersects(motion_mode)
             // Only report motion when changing cells
             && (prev_line != self.ctx.mouse().line || prev_col != self.ctx.mouse().column)
-            && size_info.contains_point(x, y)
+            && size_info.contains_point(x, y, false)
         {
             if self.ctx.mouse().left_button_state == ElementState::Pressed {
                 self.mouse_report(32, ElementState::Pressed, modifiers);

src/term/mod.rs

@@ -838,12 +838,16 @@ impl SizeInfo {
         Column(((self.width - 2. * self.padding_x) / self.cell_width) as usize)
     }
 
-    pub fn contains_point(&self, x: usize, y:usize) -> bool {
+    pub fn contains_point(&self, x: usize, y: usize, include_padding: bool) -> bool {
+        if include_padding {
+            x < self.width as usize && y < self.height as usize
+        } else {
             x < (self.width - self.padding_x) as usize
                 && x >= self.padding_x as usize
                 && y < (self.height - self.padding_y) as usize
                 && y >= self.padding_y as usize
         }
+    }
 
     pub fn pixels_to_coords(&self, x: usize, y: usize) -> Point {
         let col = Column(x.saturating_sub(self.padding_x as usize) / (self.cell_width as usize));
@@ -1104,9 +1108,10 @@ impl Term {
     /// The mouse coordinates are expected to be relative to the top left. The
     /// line and column returned are also relative to the top left.
     ///
-    /// Returns None if the coordinates are outside the screen
+    /// Returns None if the coordinates are outside the window,
+    /// padding pixels are considered inside the window
     pub fn pixels_to_coords(&self, x: usize, y: usize) -> Option<Point> {
-        if self.size_info.contains_point(x, y) {
+        if self.size_info.contains_point(x, y, true) {
             Some(self.size_info.pixels_to_coords(x, y))
         } else {
             None