Lab7: vim visual mode

Agenda
* visual modes
* visual character mode
* visual line mode
* visual block mode
* discussion


# general
:help visual.txt

v          visual character mode
shift-V    visual line mode
ctrl-v     visual block mode

<esc>      back to normal mode
ctrl-[     back to normal mode
gv         reselect last visual selection (from normal mode)


# visual character mode (v) / line mode (shift-V)
hjkl             modify selection by one character / line
<arrow>          modify selection by one character / line
shift-<arrow>    modify selection by one word

o                jump cursor to the other end (other)

d                delete selection
x                delete selection
c                change selection
y                yank selection
p                overwrite selection (put)

shift-D          delete selected lines
shift-X          delete selected lines
shift-C          change selected lines
shift-Y          yank selected lines

r[char]          replace all characters in selection with [char]
>                increase indentation [count] times
<                decrease indentation [count] times

~                toggle case
u                to lower case
U                to upper case
gu               to lower case
gU               to upper case

:                visual range
!                filter selection through external command


# visual block mode (ctrl-v)
hjkl             move block boundary one character
<arrow>          move block boundary one character
shift-<arrow>    move block boundary one word

o                jump cursor to the other end diagonally (other)
O                jump cursor to the other end horizontally (other)

d                delete selection
x                delete selection
y                yank selection
p                overwrite selection (put)

shift-I          Insert on all selected lines at start of block
shift-A          Insert on all selected lines at end of block
c                change all selected chunks

~                toggle case
u                to lower case
U                to upper case
gu               to lower case
gU               to upper case

shift-X          delete from block start to end of line 
shift-D          delete from block start to end of line
shift-C          change from block start to end of line 

>                increase indentation [count] times
<                decrease indentation [count] times
r[char]          replace all characters in selection with [char]