From f9aed867ca8b9dea01647e57fec70393f8e053cb Mon Sep 17 00:00:00 2001
From: Sam Tay <sam.chong.tay@gmail.com>
Date: Sun, 28 Jun 2020 18:27:52 -0700
Subject: Improve scrolling controls

---
 src/tui/app.rs   | 12 +++++++-----
 src/tui/views.rs | 17 +++++++++++++++--
 2 files changed, 22 insertions(+), 7 deletions(-)

diff --git a/src/tui/app.rs b/src/tui/app.rs
index 023955f..5d2515a 100644
--- a/src/tui/app.rs
+++ b/src/tui/app.rs
@@ -148,11 +148,13 @@ pub fn help() -> Dialog {
 **Space**: Cycle layout (4 Pane, 2 Pane, FullScreen)
 
 ## Scroll
-**h,j,k,l**:          ←,↓,↑,→
-**Ctrl<b>, Ctrl<u>**: ↑ x 10
-**Ctrl<f>, Ctrl<d>**: ↓ x 10
-**gg**:               Scroll To Top
-**G**:                Scroll To Bottom
+**h,j,k,l**: ←,↓,↑,→
+**Ctrl<u>**: ↑ x 5
+**Ctrl<d>**: ↓ x 5
+**Ctrl<b>**: ↑ x 10
+**Ctrl<f>**: ↓ x 10
+**gg**:      Scroll To Top
+**G**:       Scroll To Bottom
 
 ## Misc
 **ZZ, Ctrl<c>**: Exit
diff --git a/src/tui/views.rs b/src/tui/views.rs
index 3dc12a8..f191830 100644
--- a/src/tui/views.rs
+++ b/src/tui/views.rs
@@ -550,12 +550,25 @@ impl<T: View> ViewWrapper for VimBindingsView<T> {
             Event::Char('l') => {
                 return self.view.on_event(Event::Key(Key::Right));
             }
-            Event::CtrlChar('d') | Event::CtrlChar('f') => {
+            Event::CtrlChar('d') => {
                 return self.view.on_event(Event::Key(Key::PageDown));
             }
-            Event::CtrlChar('u') | Event::CtrlChar('b') => {
+            Event::CtrlChar('f') => {
+                // Double page down
+                let res = self.view.on_event(Event::Key(Key::PageDown));
+                self.view.on_event(Event::Key(Key::PageDown));
+                // Return whether or not initial page down was consumed
+                return res;
+            }
+            Event::CtrlChar('u') => {
                 return self.view.on_event(Event::Key(Key::PageUp));
             }
+            Event::CtrlChar('b') => {
+                // Double page up
+                let res = self.view.on_event(Event::Key(Key::PageUp));
+                self.view.on_event(Event::Key(Key::PageUp));
+                return res;
+            }
             Event::Char('G') => {
                 return self.view.on_event(Event::Key(Key::End));
             }
-- 
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