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remove side effects

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Daylin Morgan 2024-10-30 22:10:27 -05:00
parent d66e2ed5e2
commit 9462d99d95
Signed by: daylin
GPG key ID: 950D13E9719334AD
1 changed files with 39 additions and 29 deletions
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68
src/hwylterm/bbansi.nim
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@ -4,8 +4,7 @@
use BB style markup to add color to strings using VT100 escape codes
]##
# TODO:
#{.push raises:[].}
{.push raises:[].}
import std/[
macros, os, sequtils, strformat, strutils, terminal
@ -72,7 +71,41 @@ const ColorXTermNames = enumNames(ColorXterm).mapIt(firstCapital(it))
const BbStyleNames = enumNames(BbStyle).mapIt(firstCapital(it))
const ColorDigitStrings = (1..255).toSeq().mapIt($it)
# TODO: write non-fallible parseStyle(s) procedure
template parseUnsafe(body: untyped): untyped =
try: body
except: discard
proc parseStyle(codes: var seq[string], style: string) =
var style = normalizeStyle(style)
if style in ["B", "I", "U"]:
parseUnsafe: codes.add parseEnum[BbStyleAbbr](style).toCode()
elif style in BbStyleNames:
parseUnsafe: codes.add parseEnum[BbStyle](style).toCode()
if not (bbMode == On): return
if style in ColorXtermNames:
parseUnsafe: codes.add parseEnum[ColorXterm](style).toCode()
elif style.isHex():
codes.add style.hexToRgb.toCode()
elif style in ColorDigitStrings:
parseUnsafe: codes.add parseInt(style).toCode()
else:
when defined(debugBB): echo "unknown style: " & normalizedStyle
func parseBgStyle(codes: var seq[string], style: string) =
var style = normalizeStyle(style)
if style in ColorXtermNames:
parseUnsafe: codes.add parseEnum[ColorXTerm](style).toBgCode()
elif style.isHex():
codes.add style.hexToRgb().toBgCode()
elif style in ColorDigitStrings:
parseUnsafe: codes.add parseInt(style).toBgCode()
else:
when defined(debugBB): echo "unknown bg style: " & style
proc toAnsiCode*(s: string): string =
if bbMode == Off: return
var
@ -86,33 +119,10 @@ proc toAnsiCode*(s: string): string =
else:
styles = s.splitWhitespace()
for style in styles:
let normalizedStyle = normalizeStyle(style)
if normalizedStyle in ["B", "I", "U"]:
codes.add parseEnum[BbStyleAbbr](normalizedStyle).toCode()
elif normalizedStyle in BbStyleNames:
codes.add parseEnum[BbStyle](normalizedStyle).toCode()
if not (bbMode == On): continue
if normalizedStyle in ColorXtermNames:
codes.add parseEnum[ColorXterm](normalizedStyle).toCode()
elif normalizedStyle.isHex():
codes.add normalizedStyle.hexToRgb.toCode()
elif normalizedStyle in ColorDigitStrings:
codes.add parseInt(normalizedStyle).toCode()
else:
when defined(debugBB): echo "unknown style: " & normalizedStyle
parseStyle codes, style
if bbMode == On and bgStyle != "":
let normalizedBgStyle = normalizeStyle(bgStyle)
if normalizedBgStyle in ColorXtermNames:
codes.add parseEnum[ColorXTerm](normalizedBgStyle).toBgCode()
elif normalizedBgStyle.isHex():
codes.add normalizedBgStyle.hexToRgb().toBgCode()
elif normalizedBgStyle in ColorDigitStrings:
codes.add parseInt(normalizedBgStyle).toBgCode()
else:
when defined(debugBB): echo "unknown bg style: " & normalizedBgStyle
parseBgStyle codes, bgStyle
if codes.len > 0:
result.add "\e["
@ -325,7 +335,7 @@ proc `&`*(x: BbString, y: BbString): Bbstring =
proc bbEscape*(s: string): string {.inline.} =
s.replace("[", "[[").replace("\\", "\\\\")
proc bbEcho*(args: varargs[string, `$`]) {.sideEffect.} =
proc bbEcho*(args: varargs[string, `$`]) {.raises: [IOError]} =
for x in args:
stdout.write(x.bb)
stdout.write('\n')