抄代码，可以抄到什么程度最近，老是有同学跟我提到 "不会写代码，只会从网上抄"，在加上前两天提到的本科毕业论文同学"做"过的微博系统，觉得有必要说一下1. 什么是可以从网上抄的.最粗暴简单的回答是：一个字母也不能复制粘贴.2. 抄到什么程度你仍然可以说那是你的程序.这是个老大的哲学问题了，不过咱们不讨论那么深.故事开始.前一段时间写的程序--把窗口由一个显示器切到另一个显示器的工具--有个缺点，如果窗口已经在大显示器上最大化了，或者很长，怎么也不移动了小显示器上。虽然我可以快捷键先把它整小，然后再移。终究不爽得很。忍了很久，而且前一段时间已经找到问题的症结。今天改了下程序。因为我的程序信赖的一个工具 xdotool，不能移动最大化的窗口。而且，如果窗口比目标显示器还大，也不能移动。首先想到的是可以先把窗口缩小，然后移走，再恢复原来的大小。奈何，我没有找到 xdotool 改变最大化窗口大小的方法。所以，此路不通。想起来另一个工具可以信赖，wmctrl，倒是可以操作。不过，它不能找到当前的激活窗口。而这，正是我们要移动的东西，得知道。在网上找到一德国兄弟的作品[http://my.opera.com/raphman/blog/show.dml/302528?cid=56972962#comment56972962]，我改吧改吧抄吧抄吧，把关于xprop得到当前激活窗口的那段放我的代码里了。顺手，把用同一工具判定当前窗口是不是最大化啥的一段代码抄过来。因为窗口系统不太一样，他用KDE，我用GNOME，又改了一下。终于，我的程序能够工作了。放在[https://github.com/younggift/argus/blob/master/monitor_switch.sh]里了。现在，我们可以回过头来回答先前的问题了.1. 什么是可以从网上抄的.事实上，我们通常会抄一下 某种实现机制（比如怎么调用printf，它的参数）的代码示例， 从MSDN或者 code project 这样的站点中.当然，应该通读一下文档，而不是简单的抄代码.没有看懂的情况下就抄代码，实践证明，后患无穷.不读说明书就使用工具或者设备，是极其危险的.API也是一样.不过，如果已经了解原理，抄一段别人的实现，改吧改吧...似乎可以容忍.2. 抄到什么程度你仍然可以说那是你的程序.业务逻辑必须是你手写的，因为那是你的工作唯一区别于别人的东西.让你的需求适应用户的要求，而不是服从你能找到的资源的下限，即不能因为你手儿不行就降低要求，除非你明确知道你不行，别人也不能实现.如果我抄了德国哥们的整休代码，把其中KDE那部分换成了GNOME的，那就是大抄.我原来的代码是把适用于 左右显示器布局 的代码改成了 适用于 任何布局的双显示器， 这是加入了一部分功能， 有贡献，不过，整体的代码仍然是人家的.现在，我改成了用wmctrl，改动就又多了一些.郭小四同学抄了整体的人物设定和故事情节，那就是抄.如果只是引用一两句主席语录，那叫时尚.或者叫致敬.=======================#!/bin/bash#++++++++++++++++# Monitor Switch## Moves currently focused window from one monitor to the other.# Designed for a system with two monitors.# Script should be triggered using a keyboard shortcut.# If the window is maximized it should remain maximized after being moved.# If the window is not maximized it should retain its current size, unless# height is too large for the destination monitor, when it will be trimmed.#---------------------------------------------# dependence on xrandr, wmctrl, xprop, xwininfo, awk## modified by Young <[email protected]># based on chips617's work at
[http://ubuntuforums.org/showthread.php?t=1045417].# based on Raphael Wimmer's work at
[http://my.opera.com/raphman/blog/show.dml/302528]# History:# 2011-3-19 bug fixed: we don't depend on xdotool any more, because we
can't find the function by it to manipulate the maximized window.# 1. If the left-top conner of the active window is out of your
monitors, we cannot determin which monitor is on, therefore we suppose
it is on monitor B.# 2. if one of the monitor is rotated left, the shortcut will be disabled.# 2011-1-31 The monitors can be at any position, not only left and right.# 2007-11 the original chips617's work# bugs knonw:# empty now.# resolution and position of monitorscount=0while read linedo keys[$((++count))]="${line}"done <<EOF$( xrandr -q | grep " connected" | awk '{print $3}' | awk -F'[x+]'
'{printf("%sn%sn%sn%sn",$1, $2, $3, $4)}' )EOFw_A_monitor=${keys[1]}h_A_monitor=${keys[2]}x_A_monitor=${keys[3]}y_A_monitor=${keys[4]}w_B_monitor=${keys[5]}h_B_monitor=${keys[6]}x_B_monitor=${keys[7]}y_B_monitor=${keys[8]}# get active window# window=`xdotool getactivewindow`activeWinLine=$(xprop -root | grep "_NET_ACTIVE_WINDOW(WINDOW)")window="${activeWinLine:40}"# window title bar height# h_tbar=29xWinDecorLine=$(xprop -id $window | grep "_NET_FRAME_EXTENTS(CARDINAL)")h_tbar=${xWinDecorLine:37 :2}# get active window size and positionx=`xwininfo -id $window | grep "Absolute upper-left X" | awk '{print $4}'`y=`xwininfo -id $window | grep "Absolute upper-left Y" | awk '{print $4}'`w=`xwininfo -id $window | grep "Width" | awk '{print $2}'`h=`xwininfo -id $window | grep "Height" | awk '{print $2}'`# calculate the new position of the window ...## if the window was on A monitorif [ "$x" -ge $x_A_monitor ] && [ "$x" -le $[$x_A_monitor + $w_A_monitor] ] && [ "$y" -ge $y_A_monitor ] && [ "$y" -le $[$y_A_monitor + $h_A_monitor ] ] ; then x_target_monitor=$x_B_monitor y_target_monitor=$y_B_monitor w_target_monitor=$w_B_monitor h_target_monitor=$h_B_monitor x_source_monitor=$x_A_monitor y_source_monitor=$y_A_monitor## if the window was on B monitorelse x_target_monitor=$x_A_monitor y_target_monitor=$y_A_monitor w_target_monitor=$w_A_monitor h_target_monitor=$h_A_monitor x_source_monitor=$x_B_monitor y_source_monitor=$y_B_monitorfinew_x=$(($x-$x_source_monitor+$x_target_monitor))new_y=$(($y-$y_source_monitor+$y_target_monitor-$h_tbar))# ... and the width or the height up to the edge of the target monitorif (($w > $w_target_monitor))then w=$w_target_monitorfiif (($h > $h_target_monitor))then h=$h_target_monitorfi# move the window to another monitor# if maximized store info and de-maximizewinState=$(xprop -id $window | grep "_NET_WM_STATE(ATOM)" )if [[ `echo ${winState} | grep "_NET_WM_STATE_MAXIMIZED_HORZ"` != "" ]]then maxH=1 wmctrl -i -r $window -b remove,maximized_horzfiif [[ `echo ${winState} | grep "_NET_WM_STATE_MAXIMIZED_VERT"` != "" ]]then maxV=1 wmctrl -i -r $window -b remove,maximized_vertfi# do movewmctrl -i -r $window -e 0,$new_x,$new_y,$w,$h# the following lines are for debug.# echo x x_source_monitor x_target_monitor# echo $x $x_source_monitor $x_target_monitor# echo y y_source_monitor y_target_monitor# echo $y $y_source_monitor $y_target_monitor# echo h $h w $w# echo new_x $new_x# echo new_y $new_y# restore maximization((${maxV})) && wmctrl -i -r $window -b add,maximized_vert((${maxH})) && wmctrl -i -r $window -b add,maximized_horz# raise window (seems to be necessary sometimes)#wmctrl -i -a $window# and byeexit 0