tobias/docker-offlineimap
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Curses UI: Simplify text buffer handling

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Rather than keeping a separate queue of all logged lines in memory, we
rely on the curses window scrolling functionality to scroll lines. On
resizing the terminal this means, we'll clear the screen and start
filling it afresh, but that should be acceptable.

Signed-off-by: Sebastian Spaeth <Sebastian@SSpaeth.de>
This commit is contained in:
Sebastian Spaeth 2011-11-08 13:51:36 +01:00
parent f8d5f1890c
commit a93c80292d
1 changed files with 9 additions and 13 deletions
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20
offlineimap/ui/Curses.py
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@ -278,6 +278,7 @@ class InputHandler(ExitNotifyThread):
class CursesLogHandler(logging.StreamHandler):
"""self.ui has been set to the UI class before anything is invoked"""
def emit(self, record):
log_str = super(CursesLogHandler, self).format(record)
@ -290,11 +291,9 @@ class CursesLogHandler(logging.StreamHandler):
self.ui.tframe_lock.acquire()
self.ui.lock()
try:
for line in log_str.split("\n"):
self.ui.logwin.addstr("\n" + line, color)
self.ui.text.append((line, color))
while len(self.ui.text) > self.ui.logheight:
self.ui.text.popleft()
y,x = self.ui.logwin.getyx()
if y or x: self.ui.logwin.addch(10) # no \n before 1st item
self.ui.logwin.addstr(log_str, color)
finally:
self.ui.unlock()
self.ui.tframe_lock.release()
@ -360,7 +359,6 @@ class Blinkenlights(UIBase, CursesUtil):
self.threadframes = {}
self.accframes = {}
self.aflock = Lock()
self.text = deque()
self.stdscr = curses.initscr()
# turn off automatic echoing of keys to the screen
@ -543,7 +541,8 @@ class Blinkenlights(UIBase, CursesUtil):
def setupwindows(self, resize=False):
"""Setup and draw bannerwin and logwin
If `resize`, don't create new windows, just adapt size"""
If `resize`, don't create new windows, just adapt size. This
function should be invoked with CursesUtils.locked()."""
self.height, self.width = self.stdscr.getmaxyx()
self.logheight = self.height - len(self.accframes) - 1
if resize:
@ -557,7 +556,6 @@ class Blinkenlights(UIBase, CursesUtil):
self.draw_bannerwin()
self.logwin.idlok(True) # needed for scrollok below
self.logwin.scrollok(True) # scroll window when too many lines added
self.logwin.move(self.logheight - 1, 0)
self.draw_logwin()
self.accounts = reversed(sorted(self.accframes.keys()))
pos = self.height - 1
@ -592,11 +590,9 @@ class Blinkenlights(UIBase, CursesUtil):
color = curses.color_pair(0) #default colors
else:
color = curses.A_NORMAL
self.logwin.clear()
self.logwin.move(0, 0)
self.logwin.erase()
self.logwin.bkgd(' ', color)
for line, color in self.text:
self.logwin.addstr("\n" + line, color)
self.logwin.noutrefresh()
def getaccountframe(self, acc_name):
"""Return an AccountFrame() corresponding to acc_name