Remove scrolling.auto_scroll feature

Fixes: #1873

CHANGELOG.md

@@ -31,6 +31,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Blurred icons in KDE task switcher (alacritty.ico is now high-res)
 - Consecutive builds failing on macOS due to preexisting `/Application` symlink
 
+### Removed
+
+- Config option `auto_scroll`, which is now always disabled
+
 ## 0.4.1
 
 ### Packaging

alacritty.yml

@@ -87,9 +87,6 @@
   # scrollback is enabled (history > 0).
   #multiplier: 3
 
-  # Scroll to the bottom when new text is written to the terminal.
-  #auto_scroll: false
-
 # Spaces per Tab (changes require restart)
 #
 # This setting defines the width of a tab in cells.

alacritty/src/config/mod.rs

@@ -204,6 +204,14 @@ fn print_deprecation_warnings(config: &Config) {
              lines"
         );
     }
+
+    if config.scrolling.auto_scroll.is_some() {
+        warn!(
+            target: LOG_TARGET_CONFIG,
+            "Config scrolling.auto_scroll has been removed and is now always disabled, it can be \
+             safely removed from the config"
+        );
+    }
 }
 
 #[cfg(test)]

alacritty_terminal/src/config/scrolling.rs

@@ -11,8 +11,10 @@ pub struct Scrolling {
     history: ScrollingHistory,
     #[serde(deserialize_with = "failure_default")]
     multiplier: ScrollingMultiplier,
+
+    // TODO: REMOVED
     #[serde(deserialize_with = "failure_default")]
-    pub auto_scroll: bool,
+    pub auto_scroll: Option<bool>,
 
     // TODO: DEPRECATED
     #[serde(deserialize_with = "failure_default")]

alacritty_terminal/src/term/mod.rs

@@ -775,9 +775,6 @@ pub struct Term<T> {
     /// Number of spaces in one tab
     tabspaces: usize,
 
-    /// Automatically scroll to bottom when new lines are added
-    auto_scroll: bool,
-
     /// Clipboard access coupled to the active window
     clipboard: Clipboard,
 
@@ -911,7 +908,6 @@ impl<T> Term<T> {
             default_cursor_style: config.cursor.style,
             dynamic_title: config.dynamic_title(),
             tabspaces,
-            auto_scroll: config.scrolling.auto_scroll,
             clipboard,
             event_proxy,
             is_focused: true,
@@ -936,7 +932,6 @@ impl<T> Term<T> {
         }
         self.default_cursor_style = config.cursor.style;
         self.dynamic_title = config.dynamic_title();
-        self.auto_scroll = config.scrolling.auto_scroll;
         self.grid.update_history(config.scrolling.history() as usize, &self.cursor.template);
     }
 
@@ -1299,11 +1294,6 @@ impl<T: EventListener> Handler for Term<T> {
     /// A character to be displayed
     #[inline]
     fn input(&mut self, c: char) {
-        // If enabled, scroll to bottom when character is received
-        if self.auto_scroll {
-            self.scroll_display(Scroll::Bottom);
-        }
-
         // Number of cells the char will occupy
         let width = match c.width() {
             Some(width) => width,