package cn.sinata.xldutils.utils
|
|
import android.text.InputFilter
|
import android.text.Spanned
|
|
/**
|
* 长度inputFilter，中文算2个长度，英文1个
|
*/
|
class LengthFilter(max: Int) : InputFilter {
|
val maxLength = max.toFloat()
|
override fun filter(source: CharSequence?, start: Int, end: Int, dest: Spanned?, dstart: Int, dend: Int): CharSequence {
|
var dIndex = 0
|
var count = 0.0f
|
while (count <= maxLength && dIndex < dest!!.length) {
|
val c = dest[dIndex++]
|
count += if (c < 128.toChar()) {
|
0.5f
|
} else {
|
1.0f
|
}
|
}
|
if (count > maxLength) {
|
return dest!!.subSequence(0, dIndex - 1)
|
}
|
var sindex = 0
|
while (count <= maxLength && sindex < source!!.length) {
|
val c = source[sindex++]
|
count += if (c < 128.toChar()) {
|
0.5f
|
} else {
|
1f
|
}
|
}
|
if (count > maxLength) {
|
sindex--
|
}
|
return source!!.subSequence(0, sindex)
|
}
|
}
|
