subclient

commit 0221b01a01de62e2600e965320fb3554d5ea3e8d
parent 7020a60bfedc3fb426314840abd33f6e65e2542e
Author: Paco Esteban <paco@e1e0.net>
Date:   Sun, 27 Jun 2021 18:03:08 +0200

we can even pge now

Diffstat:
M
subclient/subclient.py
 | 
28
+++++++++++++++++++++++++++-

1 file changed, 27 insertions(+), 1 deletion(-)
diff --git a/subclient/subclient.py b/subclient/subclient.py
@@ -39,7 +39,7 @@ class SubClient:
         self.nav_top = 0
         self.nav_bottom = len(self.nav_list)
         self.nav_max_lines = curses.LINES
-        self.nav_page = self.nav_bottom // self.nav_max_lines
+        self.nav_pages = self.nav_bottom // self.nav_max_lines
 
     def init_curses(self):
         self.window = curses.initscr()
@@ -73,6 +73,10 @@ class SubClient:
                 self.nav_scroll(self.DOWN)
             elif c == 'k':
                 self.nav_scroll(self.UP)
+            elif c == 'f':
+                self.nav_page(self.DOWN)
+            elif c == 'b':
+                self.nav_page(self.UP)
             elif c in [curses.KEY_ENTER, '\r', '\n']:
                 with open('foo.txt', 'w') as f:
                     print(f"top: {self.nav_top}", file=f)
@@ -125,6 +129,28 @@ class SubClient:
                 self.nav_selected = next_line
                 return
 
+    def nav_page(self, direction):
+        current_page = (self.nav_top + self.nav_selected) // self.nav_max_lines
+        # Page up
+        # we test current page >= 0 instead of just > 0 because we can be in
+        # a situation when the calculated current page is already 0 and compare
+        # > 0 would prevent going up that last bit.  So we actuall allow to go
+        # negative and correct afterwards.
+        if (direction == self.UP) and (current_page >= 0):
+            self.nav_top -= self.nav_max_lines
+            # top cannot be negative
+            if self.nav_top < 0:
+                self.nav_top = 0
+            return
+        # Page down
+        # if current page is not last page we increment top by a full page
+        if (direction == self.DOWN) and (current_page < self.nav_pages):
+            self.nav_top += self.nav_max_lines
+            # the last page is probably shorter, so adjust for that
+            if (self.nav_top + self.nav_max_lines) > self.nav_bottom:
+                self.nav_top = self.nav_bottom - self.nav_max_lines
+            return
+
     def refresh(self):
         self.window.noutrefresh()
         curses.doupdate()