Latest PDS UI utils

1 files changed, 31 insertions, 0 deletions

diff --git a/src/main/scala/xyz/driver/pdsuicommon/utils/CharOps.scala b/src/main/scala/xyz/driver/pdsuicommon/utils/CharOps.scala
new file mode 100644
index 0000000..42bf92d
--- /dev/null
+++ b/src/main/scala/xyz/driver/pdsuicommon/utils/CharOps.scala
@@ -0,0 +1,31 @@
+package xyz.driver.pdsuicommon.utils
+
+final class CharOps(val self: Char) extends AnyVal {
+
+  import CharOps._
+
+  def isSafeWhitespace: Boolean = Whitespace.matches(self)
+
+  def isSafeControl: Boolean = JavaIsoControl.matches(self)
+}
+
+// From Guava
+private object CharOps {
+
+  object Whitespace {
+    private val Table: String =
+      "\u2002\u3000\r\u0085\u200A\u2005\u2000\u3000" +
+        "\u2029\u000B\u3000\u2008\u2003\u205F\u3000\u1680" +
+        "\u0009\u0020\u2006\u2001\u202F\u00A0\u000C\u2009" +
+        "\u3000\u2004\u3000\u3000\u2028\n\u2007\u3000"
+
+    private val Multiplier: Int = 1682554634
+    private val Shift: Int = Integer.numberOfLeadingZeros(Table.length - 1)
+
+    def matches(c: Char): Boolean = Table.charAt((Multiplier * c) >>> Shift) == c
+  }
+
+  object JavaIsoControl {
+    def matches(c: Char): Boolean = c <= '\u001f' || (c >= '\u007f' && c <= '\u009f')
+  }
+}