Merge branch 'develop' into features/JAL-2094_colourInterface

[jalview.git] / src / jalview / datamodel / AlignmentAnnotation.java

diff --git a/src/jalview/datamodel/AlignmentAnnotation.java b/src/jalview/datamodel/AlignmentAnnotation.java
index a5a38df..2a89fa1 100755 (executable)
--- a/src/jalview/datamodel/AlignmentAnnotation.java
+++ b/src/jalview/datamodel/AlignmentAnnotation.java
@@ -593,6 +593,7 @@ public class AlignmentAnnotation
     if (annotations == null)
     {
       visible = false; // try to prevent renderer from displaying.
+      invalidrnastruc = -1;
       return; // this is a non-annotation row annotation - ie a sequence score.
     }
 
@@ -1411,6 +1412,77 @@ public class AlignmentAnnotation
     this.annotationId = ANNOTATION_ID_PREFIX + Long.toString(nextId());
   }
 
+  /**
+   * Returns the match for the last unmatched opening RNA helix pair symbol
+   * preceding the given column, or '(' if nothing found to match.
+   * 
+   * @param column
+   * @return
+   */
+  public String getDefaultRnaHelixSymbol(int column)
+  {
+    String result = "(";
+    if (annotations == null)
+    {
+      return result;
+    }
+
+    /*
+     * for each preceding column, if it contains an open bracket, 
+     * count whether it is still unmatched at column, if so return its pair
+     * (likely faster than the fancy alternative using stacks)
+     */
+    for (int col = column - 1; col >= 0; col--)
+    {
+      Annotation annotation = annotations[col];
+      if (annotation == null)
+      {
+        continue;
+      }
+      String displayed = annotation.displayCharacter;
+      if (displayed == null || displayed.length() != 1)
+      {
+        continue;
+      }
+      char symbol = displayed.charAt(0);
+      if (!Rna.isOpeningParenthesis(symbol))
+      {
+        continue;
+      }
+
+      /*
+       * found an opening bracket symbol
+       * count (closing-opening) symbols of this type that follow it,
+       * up to and excluding the target column; if the count is less
+       * than 1, the opening bracket is unmatched, so return its match
+       */
+      String closer = String.valueOf(Rna
+              .getMatchingClosingParenthesis(symbol));
+      String opener = String.valueOf(symbol);
+      int count = 0;
+      for (int j = col + 1; j < column; j++)
+      {
+        if (annotations[j] != null)
+        {
+          String s = annotations[j].displayCharacter;
+          if (closer.equals(s))
+          {
+            count++;
+          }
+          else if (opener.equals(s))
+          {
+            count--;
+          }
+        }
+      }
+      if (count < 1)
+      {
+        return closer;
+      }
+    }
+    return result;
+  }
+
   protected static synchronized long nextId()
   {
     return counter++;