From 10be69aa54764c8314501fd1130d9bf8c9f859f2 Mon Sep 17 00:00:00 2001
From: nocjj <1250062498@qq.com>
Date: Thu, 29 Oct 2020 15:35:37 +0800
Subject: [PATCH 3/8] key: add page up/down key response

Add page up/down key response, move pagesize - 6 for beauty.

Signed-off-by: Jiajun Chen <1250062498@qq.com>
---
 src/vmtop.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/src/vmtop.c b/src/vmtop.c
index f4ef9ab..65181a1 100644
--- a/src/vmtop.c
+++ b/src/vmtop.c
@@ -373,6 +373,8 @@ static void show_filter(void)
 
 static void parse_keys(int key)
 {
+    int scroll_size = 1;
+
     switch (key) {
     case 'f': {
         show_filter();
@@ -382,17 +384,25 @@ static void parse_keys(int key)
         quit_flag = !quit_flag;
         break;
     }
+    case KEY_NPAGE: {
+        /* move pagesize - 6 for beauty */
+        scroll_size = scr_row_size - 6;
+    }
     case KEY_UP: {
         int task_num = thread_mode ? get_task_num(&scr_cur) : scr_cur.num;
 
-        begin_task++;
+        begin_task += scroll_size;
         if (begin_task > task_num) {
             begin_task = task_num;
         }
         break;
     }
+    case KEY_PPAGE: {
+        /* move pagesize - 6 for beauty */
+        scroll_size = scr_row_size - 6;
+    }
     case KEY_DOWN: {
-        begin_task--;
+        begin_task -= scroll_size;
         if (begin_task < 1) {
             begin_task = 1;
         }
-- 
2.27.0