Vim 的 Visual Mode 和 Recording Mode

----Visual Mode----  http://usevim.com/2012/05/11/visual/

In a typical GUI editor, a block of text can be selected by clicking the mouse and dragging over a number of lines or characters. Vim introduced Visual mode which allows us to reuse the motion commands and operators that we've learned to manipulate blocks of text.

When in Normal mode, press v to start making a selection. The arrow keys or good ol' hjkl can be used to make a selection:

If you make a mistake during highlighting, pressing <Esc> will stop it and return to Normal mode.

Typing gv will switch back into Visual mode with the last selection. This is incredibly useful when another operation needs to be applied to the previous selection. Prefixing v with a number will reselect the last selection, but will multiply the length of the selection by the number. In the example below I've made a selection, pressed <Esc>, then typed 3v:

While making a selection, pressing o will go to the other end of the visual selection. I find myself using this a lot when I need to quickly make a small change to a selection:

All of the motion commands you're familiar with will work as well. For example, pressing w will select words, pressing 9k will select nine lines up from the current cursor positions.

Operating on Selections

As we saw in Vim 101: Registers, yanking blocks of text from Visual mode is extremely useful. However, there's more! Once a selection has been made, there are several operators that can be applied. For example, pressing ~ will switch the line's case, and ! can be used to filter the selection through an external command.

I find myself typing < and > all the time -- these shift the text left or right, which is great for correcting code indentation.

Another important thing to master is pressing : to enter Ex commands. Making a selection with v then pressing : and entering a regular expression is a good way to limit the effects of a regular expression to a block of text.

To read about all of the operators and commands that can be applied to blocks, take a look at :help visual-operators.

 

----Recording Mode---- http://www.netingcn.com/vim-recording-function.html

 

使用vim时无意间触碰到q键，左下角出现“recording”这个标识，觉得好奇，遂在网上查了一下，然后这是vim的一个强大功能。他可以录制一个宏（Macro)，在开始记录后，会记录你所有的键盘输入，包括在insert模式下的输入、正常模式下使用的各种命令等。

具体使用：

第一步：在正常模式下（非insert模式、非visual模式）按下q键盘

第二步：选择a-z或0-9中任意一个作为缓冲器的名字，准备开始录制宏

第三步：正常的操作，此次所有的操作都会被记录在上一步中定义的缓冲器中

第四步：在非insert模式下输入q停止宏的录制

第五步：使用@ + 第二步中定义的缓冲器的名字即可。

例如想把下面的文字

line1
line-2
line3-1
l4

变成如下的文字

System.out.println(line1);
System.out.println(line1);
System.out.println(line-2);
System.out.println(line3-1);
System.out.println(L4);

观察可以发现他们的规律，在每行文字的开头添加“System.out.println(”，结尾添加“);”就变成下面的信息了。下面简单介绍一下如何使用recording来完成这样的操作。
首先把光标移动line1上，输入qt，准备开始录制，缓冲器的名字为t，录制的动作为：shift + ^ 回到行首、按下i键进入insert模式、输入“System.out.println(”、按下esc键回到正常模式、shift + $ 回到行尾部、按下i键进入insert模式、输入“);”按下esc键回到正常模式，按下q停止录制。然后把光标移动到下面一行的任意位置输入 @ + t 即可。

recording还可以和查询结合起来使用，例如想把一个文件中含有特定字符串的行注释，可以通过这样的宏来实现。在正常模式下输入/search string + enter、shift + ^、i、#、esc、shift + $。

让定制的宏自动执行多次的方法是先输入一个数字，然后在输入@ + 缓冲器的名字。 例如 100@t，表示执行100次。