From 313ce9c35fe234e6c322b709dd89f26468eeb0cb Mon Sep 17 00:00:00 2001
From: Arthur Sonzogni <sonzogniarthur@gmail.com>
Date: Wed, 20 Oct 2021 21:15:40 +0200
Subject: [PATCH] Add support for PageUp/PageDown/Home/End buttons. (#242)

See:
https://github.com/ArthurSonzogni/FTXUI/issues/241
---
 src/ftxui/component/container.cpp | 16 ++++++++++++++++
 src/ftxui/component/menu.cpp      |  8 ++++++++
 src/ftxui/component/radiobox.cpp  |  8 ++++++++
 3 files changed, 32 insertions(+)

diff --git a/src/ftxui/component/container.cpp b/src/ftxui/component/container.cpp
index 4521295..40e04ec 100644
--- a/src/ftxui/component/container.cpp
+++ b/src/ftxui/component/container.cpp
@@ -101,6 +101,22 @@ class VerticalContainer : public ContainerBase {
       MoveSelector(-1);
     if (event == Event::ArrowDown || event == Event::Character('j'))
       MoveSelector(+1);
+    if (event == Event::PageUp) {
+      for(int i = 0; i<box_.y_max - box_.y_min; ++i)
+        MoveSelector(-1);
+    }
+    if (event == Event::PageDown) {
+      for(int i = 0; i<box_.y_max - box_.y_min; ++i)
+        MoveSelector(1);
+    }
+    if (event == Event::Home) {
+      for (size_t i = 0; i < children_.size(); ++i)
+        MoveSelector(-1);
+    }
+    if (event == Event::End) {
+      for (size_t i = 0; i < children_.size(); ++i)
+        MoveSelector(1);
+    }
     if (event == Event::Tab && children_.size())
       MoveSelectorWrap(+1);
     if (event == Event::TabReverse && children_.size())
diff --git a/src/ftxui/component/menu.cpp b/src/ftxui/component/menu.cpp
index d166b24..bd26f0e 100644
--- a/src/ftxui/component/menu.cpp
+++ b/src/ftxui/component/menu.cpp
@@ -61,6 +61,14 @@ class MenuBase : public ComponentBase {
         (*selected_)--;
       if (event == Event::ArrowDown || event == Event::Character('j'))
         (*selected_)++;
+      if (event == Event::PageUp)
+        (*selected_) -= box_.y_max - box_.y_min;
+      if (event == Event::PageDown)
+        (*selected_) += box_.y_max - box_.y_min;
+      if (event == Event::Home)
+        (*selected_) = 0;
+      if (event == Event::End)
+        (*selected_) = entries_.size() - 1;
       if (event == Event::Tab && entries_.size())
         *selected_ = (*selected_ + 1) % entries_.size();
       if (event == Event::TabReverse && entries_.size())
diff --git a/src/ftxui/component/radiobox.cpp b/src/ftxui/component/radiobox.cpp
index 3b89707..cf43823 100644
--- a/src/ftxui/component/radiobox.cpp
+++ b/src/ftxui/component/radiobox.cpp
@@ -79,6 +79,14 @@ class RadioboxBase : public ComponentBase {
         (hovered_)--;
       if (event == Event::ArrowDown || event == Event::Character('j'))
         (hovered_)++;
+      if (event == Event::PageUp)
+        (hovered_) -= box_.y_max - box_.y_min;
+      if (event == Event::PageDown)
+        (hovered_) += box_.y_max - box_.y_min;
+      if (event == Event::Home)
+        (hovered_) = 0;
+      if (event == Event::End)
+        (hovered_) = entries_.size() - 1;
       if (event == Event::Tab && entries_.size())
         hovered_ = (hovered_ + 1) % entries_.size();
       if (event == Event::TabReverse && entries_.size())