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python - 使 curses 程序输出在程序退出后保留在终端回滚历史记录中

转载 作者:太空狗 更新时间:2023-10-29 20:56:40 26 4
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我对 curses 很陌生,所以我正在 python 中尝试一些不同的东西。

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

我想要的是在程序完成后在我的终端程序(在本例中为 tmux 或 KDE Konsole)中回滚程序输出的能力。

在我的代码中,如果我跳过 endwin() 调用,我至少可以看到输出,但是终端需要 reset 调用才能恢复运行。

此外,即使程序正在运行,在 curses 窗口向下滚动后,我也无法在 Konsole 中向后滚动以查看初始输出。

#!/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()

最佳答案

对于此任务,我建议您使用便笺簿 (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 后将 pad 的内容留在控制台上,我会从 pad 中读回内容,结束 curses 并将内容写入标准输出。

以下代码实现了您所描述的内容。

#!/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)

关于python - 使 curses 程序输出在程序退出后保留在终端回滚历史记录中,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/14446311/

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