Question

我有一个问题，当我使用彩色文本时，printf格式（对齐）不正确。在此示例中，请注意最后一列的左侧是1个空格。搜索解决方案只会告诉我，它很可能与代码中颜色变量中的转义序列有关。

有一个解决此问题的简单方法，还是我需要添加代码以在文本着色时添加一个空格？

代码：

#! /usr/bin/perl
use warnings;
use strict;
use feature qw{ say };
use Data::Dumper;

# Color variables
my $DEFAULTCOLOR = "\e[0m";
my $RED = "\e[31m";
my $GREEN = "\e[32m";
my $YELLOW = "\e[33m";
my $BLUE = "\e[34m";
my $MAGENTA = "\e[35m";

my %HeartbeatHash = (
'BOTH' => [ '-', 0, '-', 10 ],
'PTN' => [ '-', 0, '-', 10 ],
'PKT' => [ '-', 0, '-', 10 ],
);

printf ("%-9s %7s %-7s %-s\n", "Heartbeat", "Counter", "LastRun", "TriggerTime");
printf ("%-9s %7s %-7s %-d\n", "NOCOLOR", ${HeartbeatHash{'PKT'}[1]}, ${HeartbeatHash{'PKT'}[2]}, ${HeartbeatHash{'PKT'}[3]});

${HeartbeatHash{'PKT'}[1]}++;
${HeartbeatHash{'PKT'}[2]} = "Passed";

printf ("%-9s %7s %-7s %-s\n", "Heartbeat", "Counter", "LastRun", "TriggerTime");
printf ("%-9s %7s %-7s %-d\n", "NOCOLOR", ${HeartbeatHash{'PKT'}[1]}, ${HeartbeatHash{'PKT'}[2]}, ${HeartbeatHash{'PKT'}[3]});

${HeartbeatHash{'PKT'}[1]}++;
${HeartbeatHash{'PKT'}[2]} = "${GREEN}Passed${DEFAULTCOLOR}";

printf ("%-9s %7s %-7s %-s\n", "Heartbeat", "Counter", "LastRun", "TriggerTime");
printf ("%-9s %7s %-7s %-d\n", "GREEN", ${HeartbeatHash{'PKT'}[1]}, ${HeartbeatHash{'PKT'}[2]}, ${HeartbeatHash{'PKT'}[3]});

$DEFAULTCOLOR = "\033[0m";
$GREEN = "\033[32m";

${HeartbeatHash{'PKT'}[1]}++;
${HeartbeatHash{'PKT'}[2]} = "${GREEN}Passed${DEFAULTCOLOR}";

printf ("%-9s %7s %-7s %-s\n", "Heartbeat", "Counter", "LastRun", "TriggerTime");
printf ("%-9s %7s %-7s %-d\n", "GREEN", ${HeartbeatHash{'PKT'}[1]}, ${HeartbeatHash{'PKT'}[2]}, ${HeartbeatHash{'PKT'}[3]});

输出（终端在最后两行中以绿色显示文本“ Passed”：

Heartbeat Counter LastRun TriggerTime
NOCOLOR         0 -       10
Heartbeat Counter LastRun TriggerTime
NOCOLOR         1 Passed  10
Heartbeat Counter LastRun TriggerTime
GREEN           2 Passed 10
Heartbeat Counter LastRun TriggerTime
GREEN           3 Passed 10

Answer 1

分别打印颜色代码，以使printf不会将它们包括在长度计算中：

my @heartbeats = (
    { color => 'GREEN',
      code_before => "",
      code_after => "",
      counter => 1,
      last_run => 'Passed',
      time => 10 },
    { color => 'GREEN',
      code_before => $GREEN,
      code_after => $DEFAULTCOLOR,
      counter => 2,
      last_run => 'Passed',
      time => 10 },
);

printf "%-9s %7s %-7s %-s\n", qw( Heartbeat Counter LastRun TriggerTime );
for my $heartbeat (@heartbeats) {
    printf "%-9s %7s %s%-7s%s %-d\n",
        @$heartbeat{qw{ color counter code_before last_run code_after time }};
}

此外，使用Term::ANSIColor可以简化代码并防止ANSI颜色序列中的意外错字。

彩色文本的Perl printf-错误的格式输出

1 个答案: