Merge commit '2c4b142503bd2d871e6818b5cab8c38627d9e4a0' as 'examples/scala-js'

1 files changed, 35 insertions, 0 deletions

diff --git a/examples/scala-js/sbt-plugin/src/main/scala/scala/scalajs/sbtplugin/JSUtils.scala b/examples/scala-js/sbt-plugin/src/main/scala/scala/scalajs/sbtplugin/JSUtils.scala
new file mode 100644
index 0000000..a59f105
--- /dev/null
+++ b/examples/scala-js/sbt-plugin/src/main/scala/scala/scalajs/sbtplugin/JSUtils.scala
@@ -0,0 +1,35 @@
+package scala.scalajs.sbtplugin
+
+object JSUtils {
+  def listToJS(xs: List[String]): String =
+    xs.map(toJSstr _).mkString("[",",","]")
+
+  /** (almost) stolen from scala.scalajs.compiler.JSPrinters */
+  def toJSstr(str: String): String = {
+    /* Note that Java and JavaScript happen to use the same encoding for
+     * Unicode, namely UTF-16, which means that 1 char from Java always equals
+     * 1 char in JavaScript. */
+    val builder = new StringBuilder()
+    builder.append('"')
+    str foreach {
+      case '\\' => builder.append("\\\\")
+      case '"' => builder.append("\\\"")
+      case '\u0007' => builder.append("\\a")
+      case '\u0008' => builder.append("\\b")
+      case '\u0009' => builder.append("\\t")
+      case '\u000A' => builder.append("\\n")
+      case '\u000B' => builder.append("\\v")
+      case '\u000C' => builder.append("\\f")
+      case '\u000D' => builder.append("\\r")
+      case c =>
+        if (c >= 32 && c <= 126) builder.append(c.toChar) // ASCII printable characters
+        else builder.append(f"\\u$c%04x")
+    }
+    builder.append('"')
+    builder.result()
+  }
+
+  def dot2bracket(name: String): String = {
+    name.split('.').map(s => s"""[${toJSstr(s)}]""").mkString
+  }
+}