Scroll with PgUp/PgDown and larger distances.

diff --git a/ircplom.py b/ircplom.py
index f3556604a5593061143d4fd7f57ce492cd9114c8..d4c04e07124bb92cd517b297090f55e15e7cb7f4 100755 (executable)
--- a/ircplom.py
+++ b/ircplom.py
@@ -24,8 +24,8 @@ INPUT_PROMPT = ':'
 KEYBINDINGS = {
     'KEY_BACKSPACE': 'prompt_backspace',
     'KEY_ENTER': 'prompt_enter',
-    'KEY_UP': 'scroll_up',
-    'KEY_DOWN': 'scroll_down',
+    'KEY_PGUP': 'scroll_up',
+    'KEY_PGDOWN': 'scroll_down',
 }
 
 IRCSPEC_LINE_SEPARATOR = b'\r\n'
@@ -398,13 +398,12 @@ class TuiLoop(Loop):
         self._draw_prompt()
 
     def _kb__scroll_up(self) -> None:
-        if len(self._log_buffer) > self._upscroll:
-            self._upscroll += 1
+        self._upscroll = min(len(self._log_buffer) - 1,
+                             self._upscroll + self._y_pgscroll)
         self._draw_log()
 
     def _kb__scroll_down(self) -> None:
-        if self._upscroll > 1:
-            self._upscroll -= 1
+        self._upscroll = max(0, self._upscroll - self._y_pgscroll)
         self._draw_log()
 
     def _calc_and_draw_all(self) -> None:
@@ -412,6 +411,7 @@ class TuiLoop(Loop):
         self._term.calc_geometry()
         self._y_prompt = self._term.size.y - 1
         self._y_separator = self._term.size.y - 2
+        self._y_pgscroll = self._y_separator // 2
         self._draw_frame()
         self._draw_log()
         self._draw_prompt()