Ensure everything fits on screen

Depending on the window size, the controller names and number and
names of shards, we might run off the end of the screen, which aborts
curses in a rather inelegant fashion. We reduce the column widths
until everything fits.

Change-Id: I2924c005646694368b2eaa220ae3b5f3313b5c6c
Signed-off-by: Stephen Kitt <skitt@redhat.com>

diff --git a/tools/clustering/cluster-monitor/monitor.py b/tools/clustering/cluster-monitor/monitor.py
index a36cd50273349874839c11d59e19619aa09d8e13..d255b5cd9a9482c3dfc1952d6bb5a73bde842b6c 100755 (executable)
--- a/tools/clustering/cluster-monitor/monitor.py
+++ b/tools/clustering/cluster-monitor/monitor.py
@@ -36,6 +36,7 @@ import json
 import pycurl
 import string
 import argparse
+import math
 
 
 def rest_get(restURL, username, password):
@@ -136,6 +137,8 @@ curses.init_pair(3, curses.COLOR_WHITE, curses.COLOR_BLUE)
 curses.init_pair(4, curses.COLOR_WHITE, curses.COLOR_YELLOW)
 curses.init_pair(5, curses.COLOR_BLACK, curses.COLOR_YELLOW)
 
+(maxy, maxx) = stdscr.getmaxyx()
+
 key = -1
 controller_len = 0
 field_len = 0
@@ -173,6 +176,13 @@ while key != ord('q') and key != ord('Q'):
     else:
         field_len = max(field_len, 0)
 
+    # Ensure everything fits
+    if controller_len + 1 + (field_len + 1) * len(Shards) > maxx:
+        extra = controller_len + 1 + (field_len + 1) * len(Shards) - maxx
+        delta = int(math.ceil(float(extra) / (1 + len(Shards))))
+        controller_len -= delta
+        field_len -= delta
+
     # display controller and shard headers
     for row, controller in enumerate(controllers):
         stdscr.addstr(row + 1, 0, string.center(controller['name'], controller_len), curses.color_pair(1))