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import utils/map
import utils/proptable
import utils/twtuni
include res/map/charwidth_gen
# One of the few global variables in the code. Honestly, it should not exist.
var isCJKAmbiguous* = false
# Warning: this shouldn't be called without normalization.
func width*(u: uint32): int =
if u <= 0xFFFF: # fast path for BMP
if u in CombiningTable:
return 0
if u in DoubleWidthTable:
return 2
{.cast(noSideEffect).}:
if isCJKAmbiguous and DoubleWidthAmbiguousRanges.isInRange(u):
return 2
else:
if Combining.isInRange(u):
return 0
if DoubleWidthRanges.isInRange(u):
return 2
{.cast(noSideEffect).}:
if isCJKAmbiguous and DoubleWidthAmbiguousRanges.isInRange(u):
return 2
return 1
func width*(s: openArray[char]): int =
var w = 0
for u in s.points:
w += u.width()
return w
func width*(s: string; start, len: int): int =
var w = 0
var i = start
var m = len
if m > s.len:
m = s.len
while i < m:
let u = s.nextUTF8(i)
w += u.width()
return w
func padToWidth*(s: string; size: int; schar = '$'): string =
result = newStringOfCap(s.len)
var w = 0
var i = 0
var pi = 0
while i < s.len:
pi = i
w += s.nextUTF8(i).width()
if w > size - 1:
break
for j in pi ..< i:
result &= s[j]
if w > size - 1:
if w == size and i == s.len:
for j in pi ..< i:
result &= s[j]
else:
result &= schar
while w < size:
result &= ' '
inc w
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