英文:
Changing colour at column number
问题
我有一个多行字符串，要求每行的开头使用蓝色前景，而每行的其余部分使用白色前景。用户需要定义一个从哪一列开始，每行的前景色变为白色。
str="
marinex-dgrul-blue Digit-white
marinex-ltrul-blue Letter-white
marinex-nmrul-blue Numeric-white"
然后我会调用我的函数
marinex-ndic 23 "$str"
从第23列开始，文本颜色从蓝色变为白色。
英文:
I have a multiline string to print the beginning of each line with blue foreground, whereas the rest of each line uses a white foreground. The user would define a column number from which the foreground colour on each line changes to white.
str="
marinex-dgrul-blue Digit-white
marinex-ltrul-blue Letter-white
marinex-nmrul-blue Numeric-white"
Then I would call my function
marinex-ndic 23 "$str"
Starting from column number 23, the text colour gets changed from blue to white.
marinex-ndic ()
{
## Show coloured and label
local -r rst="$( tput sgr0 )" # Default Graphic Rendition
local -r blu="$( tput bold; tput setaf 39 )" # BLUE
local -r wht="$( tput bold; tput setaf 15 )" # WHITE
printf '%s\n' "$@" \
| while IFS="" read -r vl; do
printf '%s%s%s%s%s\n' "${blu}" "$vla" "$wht" "$vlb" "${rst}"
done
}
答案1
得分: 2
以下是翻译好的部分：
假设当前的代码工作正常（例如，正确打印颜色，将输入行读入vl等）在OP的环境中...
我们可以使用bash子字符串来分割$vl变量：
marinex-ndic ()
{
local col="$1" # 保存列号
shift # 移动输入参数（即，从$@中删除'col'）
local -r rst="$( tput sgr0 )" # 默认的图形修饰
local -r blu="$( tput bold; tput setaf 39 )" # 蓝色
local -r wht="$( tput bold; tput setaf 15 )" # 白色
printf '%s\n' "$@" \
| while IFS="" read -r vl; do
printf '%s%s%s%s%s\n' "${blu}" "${vl:0:col}" "$wht" "${vl:col}" "${rst}"
# ^^^^^^^^^^^ ^^^^^^^^^
done
}
注意:
- 这个特定的蓝色颜色代码（
blu）在我的环境中不起作用；我假设这些颜色在OP的环境中起作用，所以我没有尝试解决实际的颜色代码问题。 - OP可以决定是否应该添加额外的逻辑来验证
$1是否是正整数。
英文:
Assuming the current code works correctly (eg, prints correct colors, reads input lines into vl, etc) in OP's env ...
We can use bash substrings to split the $vl variable:
marinex-ndic ()
{
local col="$1" # save columnm number
shift # shift input params (ie, remove 'col' from $@)
local -r rst="$( tput sgr0 )" # Default Graphic Rendition
local -r blu="$( tput bold; tput setaf 39 )" # BLUE
local -r wht="$( tput bold; tput setaf 15 )" # WHITE
printf '%s\n' "$@" \
| while IFS="" read -r vl; do
printf '%s%s%s%s%s\n' "${blu}" "${vl:0:col}" "$wht" "${vl:col}" "${rst}"
# ^^^^^^^^^^^ ^^^^^^^^^
done
}
NOTES:
- this particular blue color code (
blu) is not working in my env; I'm assuming these colors work in OP's env so I haven't attempted to address actual color codes - OP can decide if additional logic should be added to the function to verify
$1is a positive integer
答案2
得分: 0
以下代码片段将帮助您更改特定列数的前景颜色：
printf '%s%s%s%s%s\n' "${blu}" "$vl" "$wht" "$vl" "${rst}" | while IFS="" read -r
英文:
The following code snippet will help you change the foreground colour at a specific column number:
printf '%s%s%s%s%s\n' "${blu}" "$vl" "$wht" "$vl" "${rst}" | while IFS="" read -r
答案3
得分: 0
#!/bin/bash
marinex-ndic () {
local -r col="$1"
local -r str="$2"
local -r colp1=$((col+1))
local -r rst="$( tput sgr0 )" # 默认图形修饰
local -r blu="$( tput bold; tput setaf 39 )" # 蓝色
local -r wht="$( tput bold; tput setaf 15 )" # 白色
paste <(cut -c-${col} <<<"$str" | sed "s/^/${blu}/;s/$/${rst}/") <(cut -c${colp1}- <<<"$str" | sed "s/^/${wht}/;s/$/${rst}/")
}
str="
marinex-dgrul-blue Digit-white
marinex-ltrul-blue Letter-white
marinex-nmrul-blue Numeric-white"
marinex-ndic 23 "$str"
英文:
You can also use cut & paste:
#!/bin/bash
marinex-ndic () {
local -r col="$1"
local -r str="$2"
local -r colp1=$((col+1))
local -r rst="$( tput sgr0 )" # Default Graphic Rendition
local -r blu="$( tput bold; tput setaf 39 )" # BLUE
local -r wht="$( tput bold; tput setaf 15 )" # WHITE
paste <(cut -c-${col} <<<"$str" | sed "s/^/${blu}/;s/$/${rst}/") <(cut -c${colp1}- <<<"$str" | sed "s/^/${wht}/;s/$/${rst}/")
}
str="
marinex-dgrul-blue Digit-white
marinex-ltrul-blue Letter-white
marinex-nmrul-blue Numeric-white"
marinex-ndic 23 "$str"
通过集体智慧和协作来改善编程学习和解决问题的方式。致力于成为全球开发者共同参与的知识库，让每个人都能够通过互相帮助和分享经验来进步。
评论