8356803: Test TextLayout/TestControls fails on windows & linux: line and paragraph separator show non-zero advance

8356812: Create an automated version of TextLayout/TestControls

Reviewed-by: prr, honkar

Author: Daniel Gredler

src/java.desktop/share/classes/sun/font/FontUtilities.java

@@ -370,17 +370,25 @@ public static boolean isDefaultIgnorable(int charCode) {
     }
 
     /**
-     * Checks whether or not the specified codepoint is whitespace which is
+     * <p>Checks whether or not the specified codepoint is whitespace which is
      * ignorable at the shaping stage of text rendering. These ignorable
      * whitespace characters should be used prior to text shaping and
      * rendering to determine the position of the text, but are not themselves
      * rendered.
      *
+     * <p>Includes 0x0009 (horizontal tab / TAB), 0x000A (line feed / LF),
+     * 0x000B (vertical tab / VT), 0x000C (form feed / FF),
+     * 0x000D (carriage return / CR), 0x0085 (next line / NEL),
+     * 0x2028 (line separator / LS), 0x2029 (paragraph separator / PS).
+     *
      * @param ch the codepoint to check
      * @return whether the specified codepoint is ignorable whitespace
      */
     public static boolean isIgnorableWhitespace(int ch) {
-        return ch == 0x0009 || ch == 0x000a || ch == 0x000d;
+        return (ch >= 0x0009 && ch <= 0x000d)
+            || ch == 0x0085
+            || ch == 0x2028
+            || ch == 0x2029;
     }
 
     public static PlatformLogger getLogger() {