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atom/src/text-utils.coffee at master · feicc/atom · GitHub
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isHighSurrogate
=
(
charCode
)
->
0xD800
<=
charCode
<=
0xDBFF
isLowSurrogate
=
(
charCode
)
->
0xDC00
<=
charCode
<=
0xDFFF
isVariationSelector
=
(
charCode
)
->
0xFE00
<=
charCode
<=
0xFE0F
isCombiningCharacter
=
(
charCode
)
->
0x0300
<=
charCode
<=
0x036F
or
0x1AB0
<=
charCode
<=
0x1AFF
or
0x1DC0
<=
charCode
<=
0x1DFF
or
0x20D0
<=
charCode
<=
0x20FF
or
0xFE20
<=
charCode
<=
0xFE2F
#
Are the given character codes a high/low surrogate pair?
#
#
* `charCodeA` The first character code {Number}.
#
* `charCode2` The second character code {Number}.
#
#
Return a {Boolean}.
isSurrogatePair
=
(
charCodeA
,
charCodeB
)
->
isHighSurrogate
(charCodeA)
and
isLowSurrogate
(charCodeB)
#
Are the given character codes a variation sequence?
#
#
* `charCodeA` The first character code {Number}.
#
* `charCode2` The second character code {Number}.
#
#
Return a {Boolean}.
isVariationSequence
=
(
charCodeA
,
charCodeB
)
->
not
isVariationSelector
(charCodeA)
and
isVariationSelector
(charCodeB)
#
Are the given character codes a combined character pair?
#
#
* `charCodeA` The first character code {Number}.
#
* `charCode2` The second character code {Number}.
#
#
Return a {Boolean}.
isCombinedCharacter
=
(
charCodeA
,
charCodeB
)
->
not
isCombiningCharacter
(charCodeA)
and
isCombiningCharacter
(charCodeB)
#
Is the character at the given index the start of high/low surrogate pair
#
a variation sequence, or a combined character?
#
#
* `string` The {String} to check for a surrogate pair, variation sequence,
#
or combined character.
#
* `index` The {Number} index to look for a surrogate pair, variation
#
sequence, or combined character.
#
#
Return a {Boolean}.
isPairedCharacter
=
(
string
,
index
=
0
)
->
charCodeA
=
string
.
charCodeAt
(index)
charCodeB
=
string
.
charCodeAt
(index
+
1
)
isSurrogatePair
(charCodeA, charCodeB)
or
isVariationSequence
(charCodeA, charCodeB)
or
isCombinedCharacter
(charCodeA, charCodeB)
IsJapaneseKanaCharacter
=
(
charCode
)
->
0x3000
<=
charCode
<=
0x30FF
isCJKUnifiedIdeograph
=
(
charCode
)
->
0x4E00
<=
charCode
<=
0x9FFF
isFullWidthForm
=
(
charCode
)
->
0xFF01
<=
charCode
<=
0xFF5E
or
0xFFE0
<=
charCode
<=
0xFFE6
isDoubleWidthCharacter
=
(
character
)
->
charCode
=
character
.
charCodeAt
(
0
)
IsJapaneseKanaCharacter
(charCode)
or
isCJKUnifiedIdeograph
(charCode)
or
isFullWidthForm
(charCode)
isHalfWidthCharacter
=
(
character
)
->
charCode
=
character
.
charCodeAt
(
0
)
0xFF65
<=
charCode
<=
0xFFDC
or
0xFFE8
<=
charCode
<=
0xFFEE
isKoreanCharacter
=
(
character
)
->
charCode
=
character
.
charCodeAt
(
0
)
0xAC00
<=
charCode
<=
0xD7A3
or
0x1100
<=
charCode
<=
0x11FF
or
0x3130
<=
charCode
<=
0x318F
or
0xA960
<=
charCode
<=
0xA97F
or
0xD7B0
<=
charCode
<=
0xD7FF
isCJKCharacter
=
(
character
)
->
isDoubleWidthCharacter
(character)
or
isHalfWidthCharacter
(character)
or
isKoreanCharacter
(character)
isWordStart
=
(
previousCharacter
,
character
)
->
(previousCharacter
is
'
'
or
previousCharacter
is
'
\t
'
)
and
(character
isnt
'
'
and
character
isnt
'
\t
'
)
isWrapBoundary
=
(
previousCharacter
,
character
)
->
isWordStart
(previousCharacter, character)
or
isCJKCharacter
(character)
#
Does the given string contain at least surrogate pair, variation sequence,
#
or combined character?
#
#
* `string` The {String} to check for the presence of paired characters.
#
#
Returns a {Boolean}.
hasPairedCharacter
=
(
string
)
->
index
=
0
while
index
<
string
.
length
return
true
if
isPairedCharacter
(string, index)
index
++
false
module
.
exports
=
{
isPairedCharacter, hasPairedCharacter,
isDoubleWidthCharacter, isHalfWidthCharacter, isKoreanCharacter,
isWrapBoundary
}
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