使curses程序输出在程序退出后保留在终端滚动历史记录中

Question

我对诅咒很陌生，所以我在python中尝试了一些不同的东西。在

我已经初始化了窗口并为window对象设置了scrollok。我可以添加字符串，并且滚动可以使addstr（）在窗口末尾没有任何错误。在

我想要的是，在程序完成后，能够在终端程序（在本例中是tmux或KDE Konsole）中回滚程序输出。在

在我的代码中，如果跳过endwin（）调用，至少可以看到输出，但是终端需要一个reset调用才能恢复正常工作。在

而且，即使程序正在运行，在curses窗口向下滚动之后，我也无法在Konsole中滚动查看初始输出。在

#!/usr/bin/env python2
import curses
import time
win = curses.initscr()
win.scrollok(True)
(h,w)=win.getmaxyx()
h = h + 10
while h > 0:
    win.addstr("[h=%d] This is a sample string.  After 1 second, it will be lost\n" % h)
    h = h - 1
    win.refresh()
    time.sleep(0.05)
time.sleep(1.0)
curses.endwin()

Answer 1

对于这个任务，我建议您使用pad（http://docs.python.org/2/library/curses.html#curses.newpad）：

A pad is like a window, except that it is not restricted by the screen size, and is not necessarily associated with a particular part of the screen. [...] only a part of the window will be on the screen at one time. [...]

为了在您使用完curses之后将pad的内容保留在控制台上，我将从pad读回内容，结束curses并将内容写入标准输出。在

下面的代码实现了您所描述的。在

#!/usr/bin/env python2

import curses
import time

# Create curses screen
scr = curses.initscr()
scr.keypad(True)
scr.refresh()
curses.noecho()

# Get screen width/height
height,width = scr.getmaxyx()

# Create a curses pad (pad size is height + 10)
mypad_height = height + 10
mypad = curses.newpad(mypad_height, width);
mypad.scrollok(True)
mypad_pos = 0
mypad_refresh = lambda: mypad.refresh(mypad_pos, 0, 0, 0, height-1, width)
mypad_refresh()

# Fill the window with text (note that 5 lines are lost forever)
for i in range(0, height + 15):
    mypad.addstr("{0} This is a sample string...\n".format(i))
    if i > height: mypad_pos = min(i - height, mypad_height - height)
    mypad_refresh()
    time.sleep(0.05)

# Wait for user to scroll or quit
running = True
while running:
    ch = scr.getch()
    if ch == curses.KEY_DOWN and mypad_pos < mypad_height - height:
        mypad_pos += 1
        mypad_refresh()
    elif ch == curses.KEY_UP and mypad_pos > 0:
        mypad_pos -= 1
        mypad_refresh()
    elif ch < 256 and chr(ch) == 'q':
        running = False

# Store the current contents of pad
mypad_contents = []
for i in range(0, mypad_height):
    mypad_contents.append(mypad.instr(i, 0))

# End curses
curses.endwin()

# Write the old contents of pad to console
print '\n'.join(mypad_contents)