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filters/colorize: various fixes 

Diff chunks can occur in the middle of email conversations followed by
regular and/or quoted text. Handle that properly.

Change diff meta lines inside quotes to bold. Update the meta lines with
more combination for renamed, copied and deleted files.

Fix the diff_chunk invalid color code, only colorize the chunk
characters, not the whole line.

Remove redundant variable resets to 0.

Signed-off-by: Robin Jarry <robin@jarry.cc>
Acked-on-irc-by: Tim Culverhouse <tim@timculverhouse.com>
This commit is contained in:
Robin Jarry 2022-10-18 08:55:02 +02:00
parent e055089d2f
commit 41c14b206c
1 changed files with 19 additions and 27 deletions
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46
filters/colorize
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@ -7,7 +7,7 @@ BEGIN {
header = "\033[38;2;175;135;255m" # purple
signature = "\033[38;2;175;135;255m" # purple
diff_meta = "\033[1;38;2;255;255;255m" # bold white
diff_chunk = "\033[38;205;0;205m" # cyan
diff_chunk = "\033[38;2;0;205;205m" # cyan
diff_add = "\033[38;2;0;205;0m" # green
diff_del = "\033[38;2;205;0;0m" # red
quote_1 = "\033[38;2;95;175;255m" # blue
@ -15,6 +15,7 @@ BEGIN {
quote_3 = "\033[38;2;175;135;255m" # purple
quote_4 = "\033[38;2;255;95;215m" # pink
quote_x = "\033[38;2;128;128;128m" # gray
bold = "\033[1m"
reset = "\033[0m"
# state
in_diff = 0
@ -24,6 +25,7 @@ BEGIN {
# patterns
header_pattern = @/^[A-Z][[:alnum:]-]+:/
url_pattern = @/[a-z]{2,6}:\/\/[[:graph:]]+|(mailto:)?[[:alnum:]_\+\.~\/-]*[[:alnum:]_]@[[:lower:]][[:alnum:]\.-]*[[:lower:]]/
meta_pattern = @/^(diff --git|(new|deleted) file|similarity index|(rename|copy) (to|from)|index|---|\+\+\+) /
}
function color_quote(line) {
level = 0
@ -48,7 +50,9 @@ function color_quote(line) {
} else {
color = quote_x
}
if (line ~ /^\+/) {
if (line ~ meta_pattern) {
return color quotes bold line reset
} else if (line ~ /^\+/) {
return color quotes diff_add line reset
} else if (line ~ /^-/) {
return color quotes diff_del line reset
@ -62,27 +66,31 @@ function color_quote(line) {
if (in_diff) {
if ($0 ~ /^-- ?$/) {
in_signature = 1
in_diff = 0
in_headers = 0
in_body = 0
in_signature = 1
$0 = signature $0 reset
} else if ($0 ~ /^@@ /) {
$0 = diff_chunk $0 reset
} else if ($0 ~ /^(diff --git|index|---|\+\+\+) /) {
gsub(/^@@[^@]+@@/, diff_chunk "&" reset)
} else if ($0 ~ meta_pattern) {
$0 = diff_meta $0 reset
} else if ($0 ~ /^\+/) {
$0 = diff_add $0 reset
} else if ($0 ~ /^-/) {
$0 = diff_del $0 reset
} else if ($0 !~ /^ / && $0 !~ /^$/) {
in_diff = 0
in_body = 1
if ($0 ~ /^>/) {
$0 = color_quote($0)
} else {
gsub(url_pattern, url "&" reset)
}
}
} else if (in_signature) {
gsub(url_pattern, url "&" signature)
$0 = signature $0 reset
} else if (in_headers) {
if ($0 ~ /^$/) {
in_signature = 0
in_diff = 0
in_headers = 0
in_body = 1
} else {
@ -93,43 +101,27 @@ function color_quote(line) {
if ($0 ~ /^>/) {
$0 = color_quote($0)
} else if ($0 ~ /^diff --git /) {
in_signature = 0
in_diff = 1
in_headers = 0
in_body = 0
in_diff = 1
$0 = diff_meta $0 reset
} else if ($0 ~ /^-- ?$/) {
in_signature = 1
in_diff = 0
in_headers = 0
in_body = 0
in_signature = 1
$0 = signature $0 reset
} else {
gsub(url_pattern, url "&" reset)
}
} else if ($0 ~ /^diff --git /) {
in_signature = 0
in_diff = 1
in_headers = 0
in_body = 0
$0 = diff_meta $0 reset
} else if ($0 ~ /^-- ?$/) {
in_signature = 1
in_diff = 0
in_headers = 0
in_body = 0
$0 = signature $0 reset
} else if ($0 ~ header_pattern) {
in_signature = 0
in_diff = 0
in_headers = 1
in_body = 0
sub(header_pattern, header "&" reset)
gsub(url_pattern, url "&" reset)
} else {
in_signature = 0
in_diff = 0
in_headers = 0
in_body = 1
if ($0 ~ /^>/) {
$0 = color_quote($0)