<:
use utf8;
use strict;
use warnings;
no warnings 'qw'; # you know what you doing
no warnings 'uninitialized'; # save some useless checks for more legible code
our $VERSION = '1.1';
our $ascii = 0;
if (exists $get{ascii}) {
$ascii = $get{ascii} ne '0'; # manual override
} elsif (defined $ENV{HTTP_ACCEPT_CHARSET}) {
$ascii = 1;
for (split q{,}, $ENV{HTTP_ACCEPT_CHARSET}) {
$ascii = 0, last if $_ eq '*' or m{utf-?8}i;
}
}
my $charset = $ascii ? 'us-ascii' : 'utf-8';
my $ctype = "text/html; charset=$charset";
$header{content_type} = $ctype;
:>
vi cheat sheet
<:
my %styles = map {$_ => $_} qw(dark circus mono terse);
our $style = exists $get{style} && $styles{$get{style}} || 'light';
printf(qq{\n},
$_ eq $style ? 'stylesheet' : 'alternate stylesheet', "$_.css", $_
) for keys %styles;
our $showkeys = exists $get{keys} && $get{keys} ne '0';
print "\n" unless $showkeys;
print "\n"
if $showkeys and $get{keys} eq 'ghost';
:>
vi/vim cheat sheet
normal mode (default)
-
<:
our %sign = (
arg => $ascii ? '.' : '·', # described as 'dot'
motion => $ascii ? '|' : '↕',
alias => $ascii ? 'see: ' : '»',
up => $ascii ? 'up' : '▲',
right => $ascii ? 'right' : '▶',
down => $ascii ? 'down' : '▼',
left => $ascii ? 'left' : '◀',
sep => $ascii ? '*' : '•',
_ => exists $get{ascii} && !$ascii ? "\x{200b}" : '',
# use the correct ZWNJ only when unicode is forced on
# default to use unofficial html for best support
);
my %keys = do 'vim-cmds.inc.pl';
my @casedesc = qw(ctrl shift);
my @rowdesc = qw(numeric top home bottom);
my %keyrows = do 'vim-keys.inc.pl';
sub keyunalias {
my ($key, %tree) = @_;
$key =~ s/(\S*?)(\^?\S)($|\s.*)/$2/;
my $mode = $1;
return [] unless defined $keys{$mode}{$key};
return $keys{$mode}{$key} if ref $keys{$mode}{$key};
return if $tree{$key}++; # endless loop failsafe
return keyunalias($keys{$mode}{$key}, %tree);
}
sub escapeclass {
local $_ = shift;
s/\^/_c/g;
s/\[/_sbo/g;
s/\]/_sbc/g;
s/^$/_/;
return $_;
}
my %keytrans = qw(
^@ NUL ^a SOH ^b STX ^c ETX ^d EOT ^e ENQ ^f ACK ^g BEL
^h BS ^i tab ^j LF ^k VT ^l FF ^m CR ^n SO ^o SI
^p DLE ^q DC1 ^r DC2 ^s DC3 ^t DC4 ^u NAK ^v SYN ^w ETB
^x CAN ^y EM ^z SUB ^[ ESC ^\ FS ^] GS ^^ RS ^_ US
^? DEL
);
sub print_key {
my ($mode, $key, $keyinfo) = @_;
$keyinfo = [ $sign{alias}.$keyinfo, keyunalias($keyinfo)->[1] . ' alias' ]
if defined $keyinfo and not ref $keyinfo; # alias
my ($desc, $flags, $mnem) = @$keyinfo if defined $keyinfo;
defined $desc or $flags = $key eq '^0' ? 'ni' : 'no';
# $key = $keytrans{$key} if defined $keytrans{$key};
my $keytxt = $mode . Entity($key) if $key ne '^0';
$keytxt .= $sign{arg} while $flags =~ s/ ?\barg\b//; # argument
$keytxt .= "$sign{motion}" if $flags =~ s/ ?\bargm\b//; # motion argument
$keytxt =~ s{\^(?=.)}{^}; # element around ctrl-identifier
my $onclick = $flags =~ s/ ?\bmode(\S*)// && defined $keys{$1} && sprintf(
' onclick="setmode(%s)"',
$1 eq '' ? '' : sprintf(q{'mode%s'}, escapeclass($1))
);
$onclick .= sprintf(q{ onclick="document.location='%s'"}, $1)
if $flags =~ s/ ?\blink(\S*)//;
my $keyhint = defined($mnem) && qq{ title="$mnem"};
print qq{\t\t- $keytxt};
print ' ', $desc if defined $desc;
print "\n";
}
our $map = defined $keyrows{$get{map}} ? $get{map} : 'qwerty';
my $keyrows = $keyrows{$map};
for (my $row = 0; $row <= $#$keyrows; $row++) {
my $keyrow = $keyrows->[$row];
print qq{
\n};
while (my ($mode, $modekeys) = each %keys) {
for (my $case = 0; $case <= $#$keyrow; $case++) {
my $keycase = $keyrow->[$case];
@$keycase or next;
printf "\t", $mode ne '' && sprintf(
' class="%s"', 'mode mode' . escapeclass($mode)
);
printf("%s: %s
\n", # XXX insert here to fix msie<=6
$modekeys->{desc} || "mode $mode",
"$rowdesc[$row] row $casedesc[$case]"
);
my $caseclass = 'keys';
$caseclass .= ' lead' if defined $modekeys->{lead}; # leading command key shown
$caseclass .= " $casedesc[$case]" if defined $casedesc[$case];
print qq{\t\t\n};
print_key($modekeys->{lead}, $_, $modekeys->{$_}) for @$keycase;
print qq{\t\t
\n};
} # case
} # mode
print qq{\t
\n};
} # row
:>
- info
- Info command: shows/does something without altering anything.
- motion
- Moves the cursor, or defines the range for an operator (<:= $sign{motion} :>).
- positioning
- Other movement (jumps, window (re)positioning).
- command
- Direct action command.
- ins mode
- Enters Insert or Replace mode.
- mode
- Enters a different mode.
- vis mode
- Enters Visual or Select mode.
- key cmd
- Additional key commands (click for overview).
- key<:= $sign{arg} :>
- Commands with a dot need a char argument afterwards.
- key<:= $sign{motion} :>
- Requires a motion afterwards, operates between cursor and destination.
- vim
- Not in original Vi (assessment incomplete).
- vim7
- New in vim version 7.x.
- keyboard map is
<:= $get{map} ? 'set to ' : '' :><:= $map :>
- ascii mode is
<:= exists $get{ascii} && 'forced ' :><:=
$ascii ? 'on' : 'off' :>
- keys are
<:= $showkeys ? 'always shown' : 'hidden if unassigned' :><:=
exists $get{keys} || ' by default' :>
- default style is
<:= defined $get{style} && 'set to ' :><:= $style :>