prefs: Report errors while editing custom layouts

Errors are obtained by running the parser, validation is throttle to
when the user stops editing for a second.

1 files changed, 10 insertions, 3 deletions

diff --git a/srcs/juloo.keyboard2/KeyboardData.java b/srcs/juloo.keyboard2/KeyboardData.java
index 8ecd053..9326ad8 100644
--- a/srcs/juloo.keyboard2/KeyboardData.java
+++ b/srcs/juloo.keyboard2/KeyboardData.java
@@ -201,9 +201,7 @@ class KeyboardData
   {
     try
     {
-      XmlPullParser parser = Xml.newPullParser();
-      parser.setInput(new StringReader(src));
-      return parse_keyboard(parser);
+      return load_string_exn(src);
     }
     catch (Exception e)
     {
@@ -211,6 +209,15 @@ class KeyboardData
     }
   }
 
+  /** Like [load_string] but throws an exception on error and do not return
+      [null]. */
+  public static KeyboardData load_string_exn(String src) throws Exception
+  {
+    XmlPullParser parser = Xml.newPullParser();
+    parser.setInput(new StringReader(src));
+    return parse_keyboard(parser);
+  }
+
   private static KeyboardData parse_keyboard(XmlPullParser parser) throws Exception
   {
     if (!expect_tag(parser, "keyboard"))