add ScrollToTop and ScrollToBottom key assignments

refs: https://github.com/wez/wezterm/issues/1360

config/src/keyassignment.rs

@@ -179,6 +179,8 @@ pub enum KeyAssignment {
     ScrollByPage(isize),
     ScrollByLine(isize),
     ScrollToPrompt(isize),
+    ScrollToTop,
+    ScrollToBottom,
     ShowTabNavigator,
     ShowDebugOverlay,
     HideApplication,

docs/changelog.md

@@ -14,6 +14,7 @@ As features stabilize some brief notes about them will accumulate here.
 #### New
 
 * unix domains now support an optional `proxy_command` to use in place of a direct unix socket connection. [Read more about multiplexing unix domains](multiplexing.html#unix-domains)
+* [ScrollToTop](config/lua/keyassignment/ScrollToTop.md) and [ScrollToBottom](config/lua/keyassignment/ScrollToBottom.md) key assignments [#1360](https://github.com/wez/wezterm/issues/1360)
 
 #### Changed
 

docs/config/lua/keyassignment/ScrollToBottom.md

@@ -0,0 +1,7 @@
+# ScrollToBottom
+
+*Since: nightly builds only*
+
+This action scrolls the viewport to the bottom of the scrollback.
+
+

docs/config/lua/keyassignment/ScrollToTop.md

@@ -0,0 +1,6 @@
+# ScrollToTop
+
+*Since: nightly builds only*
+
+This action scrolls the viewport to the top of the scrollback.
+

wezterm-gui/src/termwindow/mod.rs

@@ -1876,6 +1876,8 @@ impl TermWindow {
             ScrollByPage(n) => self.scroll_by_page(*n)?,
             ScrollByLine(n) => self.scroll_by_line(*n)?,
             ScrollToPrompt(n) => self.scroll_to_prompt(*n)?,
+            ScrollToTop => self.scroll_to_top(pane),
+            ScrollToBottom => self.scroll_to_bottom(pane),
             ShowTabNavigator => self.show_tab_navigator(),
             ShowDebugOverlay => self.show_debug_overlay(),
             ShowLauncher => self.show_launcher(),
@@ -2162,6 +2164,11 @@ impl TermWindow {
         }
     }
 
+    fn scroll_to_top(&mut self, pane: &Rc<dyn Pane>) {
+        let dims = pane.get_dimensions();
+        self.set_viewport(pane.pane_id(), Some(dims.scrollback_top), dims);
+    }
+
     fn scroll_to_bottom(&mut self, pane: &Rc<dyn Pane>) {
         self.pane_state(pane.pane_id()).viewport = None;
     }