add scroll page

src/client/tab.rs

@@ -2171,6 +2171,30 @@ impl Tab {
             self.render();
         }
     }
+    pub fn scroll_active_terminal_up_page(&mut self) {
+        if let Some(active_terminal_id) = self.get_active_terminal_id() {
+            let active_terminal = self
+                .panes
+                .get_mut(&PaneId::Terminal(active_terminal_id))
+                .unwrap();
+            // prevent overflow when row == 0
+            let scroll_columns =  active_terminal.rows().max(1) - 1;
+            active_terminal.scroll_up(scroll_columns);
+            self.render();
+        }
+    }
+    pub fn scroll_active_terminal_down_page(&mut self) {
+        if let Some(active_terminal_id) = self.get_active_terminal_id() {
+            let active_terminal = self
+                .panes
+                .get_mut(&PaneId::Terminal(active_terminal_id))
+                .unwrap();
+            // prevent overflow when row == 0
+            let scroll_columns =  active_terminal.rows().max(1) - 1;
+            active_terminal.scroll_down(scroll_columns);
+            self.render();
+        }
+    }
     pub fn clear_active_terminal_scroll(&mut self) {
         if let Some(active_terminal_id) = self.get_active_terminal_id() {
             let active_terminal = self

src/common/errors.rs

@@ -196,6 +196,8 @@ pub enum ScreenContext {
     Quit,
     ScrollUp,
     ScrollDown,
+    PageScrollUp,
+    PageScrollDown,
     ClearScroll,
     CloseFocusedPane,
     ToggleActiveTerminalFullscreen,
@@ -238,6 +240,8 @@ impl From<&ScreenInstruction> for ScreenContext {
             ScreenInstruction::Quit => ScreenContext::Quit,
             ScreenInstruction::ScrollUp => ScreenContext::ScrollUp,
             ScreenInstruction::ScrollDown => ScreenContext::ScrollDown,
+            ScreenInstruction::PageScrollUp => ScreenContext::PageScrollUp,
+            ScreenInstruction::PageScrollDown => ScreenContext::PageScrollDown,
             ScreenInstruction::ClearScroll => ScreenContext::ClearScroll,
             ScreenInstruction::CloseFocusedPane => ScreenContext::CloseFocusedPane,
             ScreenInstruction::ToggleActiveTerminalFullscreen => {

src/common/input/actions.rs

@@ -33,6 +33,10 @@ pub enum Action {
     ScrollUp,
     /// Scroll down in focus pane.
     ScrollDown,
+    /// Scroll up one page in focus pane.
+    PageScrollUp,
+    /// Scroll down one page in focus pane.
+    PageScrollDown,
     /// Toggle between fullscreen focus pane and normal layout.
     ToggleFocusFullscreen,
     /// Open a new pane in the specified direction (relative to focus).

src/common/input/handler.rs

@@ -184,6 +184,16 @@ impl InputHandler {
                     .send(ScreenInstruction::ScrollDown)
                     .unwrap();
             }
+            Action::PageScrollUp => {
+                self.send_screen_instructions
+                    .send(ScreenInstruction::PageScrollUp)
+                    .unwrap();
+            }
+            Action::PageScrollDown => {
+                self.send_screen_instructions
+                    .send(ScreenInstruction::PageScrollDown)
+                    .unwrap();
+            }
             Action::ToggleFocusFullscreen => {
                 self.send_screen_instructions
                     .send(ScreenInstruction::ToggleActiveTerminalFullscreen)

src/common/input/keybinds.rs

@@ -340,6 +340,11 @@ impl Keybinds {
                 defaults.insert(Key::Char('j'), vec![Action::ScrollDown]);
                 defaults.insert(Key::Char('k'), vec![Action::ScrollUp]);
 
+                defaults.insert(Key::Ctrl('f'), vec![Action::PageScrollDown]);
+                defaults.insert(Key::Ctrl('b'), vec![Action::PageScrollUp]);
+                defaults.insert(Key::PageDown, vec![Action::PageScrollDown]);
+                defaults.insert(Key::PageUp, vec![Action::PageScrollUp]);
+
                 defaults.insert(Key::Down, vec![Action::ScrollDown]);
                 defaults.insert(Key::Up, vec![Action::ScrollUp]);
 

src/common/mod.rs

@@ -366,6 +366,18 @@ pub fn start(mut os_input: Box<dyn OsApi>, opts: CliArgs) {
                                 .unwrap()
                                 .scroll_active_terminal_down();
                         }
+                        ScreenInstruction::PageScrollUp => {
+                            screen
+                                .get_active_tab_mut()
+                                .unwrap()
+                                .scroll_active_terminal_up_page();
+                        }
+                        ScreenInstruction::PageScrollDown => {
+                            screen
+                                .get_active_tab_mut()
+                                .unwrap()
+                                .scroll_active_terminal_down_page();
+                        }
                         ScreenInstruction::ClearScroll => {
                             screen
                                 .get_active_tab_mut()

src/common/screen.rs

@@ -38,6 +38,8 @@ pub enum ScreenInstruction {
     Quit,
     ScrollUp,
     ScrollDown,
+    PageScrollUp,
+    PageScrollDown,
     ClearScroll,
     CloseFocusedPane,
     ToggleActiveTerminalFullscreen,