X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Fdatamodel%2FVisibleContigsIterator.java;fp=src%2Fjalview%2Fdatamodel%2FVisibleContigsIterator.java;h=0185978a05df45086c8c6b2eaf7f900c9c3c3a0f;hb=b83eff8c672cede0305da3c76823dab414749dde;hp=0000000000000000000000000000000000000000;hpb=d943fcd0dc04fd4974344eddd13902c89fb595b2;p=jalview.git
diff --git a/src/jalview/datamodel/VisibleContigsIterator.java b/src/jalview/datamodel/VisibleContigsIterator.java
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+/*
+ * Jalview - A Sequence Alignment Editor and Viewer ($$Version-Rel$$)
+ * Copyright (C) $$Year-Rel$$ The Jalview Authors
+ *
+ * This file is part of Jalview.
+ *
+ * Jalview is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 3
+ * of the License, or (at your option) any later version.
+ *
+ * Jalview is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+ * PURPOSE. See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Jalview. If not, see .
+ * The Jalview Authors are detailed in the 'AUTHORS' file.
+ */
+package jalview.datamodel;
+
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+
+/**
+ * An iterator which iterates over visible regions in a range. Provides a
+ * special "endsAtHidden" indicator to allow callers to determine if the final
+ * visible column is adjacent to a hidden region.
+ */
+public class VisibleContigsIterator implements Iterator
+{
+ private List vcontigs = new ArrayList<>();
+
+ private int currentPosition = 0;
+
+ private boolean endsAtHidden = false;
+
+ VisibleContigsIterator(int start, int end,
+ List hiddenColumns)
+ {
+ if (hiddenColumns != null && hiddenColumns.size() > 0)
+ {
+ int vstart = start;
+ int hideStart;
+ int hideEnd;
+
+ for (int[] region : hiddenColumns)
+ {
+ endsAtHidden = false;
+ hideStart = region[0];
+ hideEnd = region[1];
+
+ // navigate to start
+ if (hideEnd < vstart)
+ {
+ continue;
+ }
+ if (hideStart > vstart)
+ {
+ if (end - 1 > hideStart - 1)
+ {
+ int[] contig = new int[] { vstart, hideStart - 1 };
+ vcontigs.add(contig);
+ endsAtHidden = true;
+ }
+ else
+ {
+ int[] contig = new int[] { vstart, end - 1 };
+ vcontigs.add(contig);
+ }
+ }
+ vstart = hideEnd + 1;
+
+ // exit if we're past the end
+ if (vstart >= end)
+ {
+ break;
+ }
+ }
+
+ if (vstart < end)
+ {
+ int[] contig = new int[] { vstart, end - 1 };
+ vcontigs.add(contig);
+ endsAtHidden = false;
+ }
+ }
+ else
+ {
+ int[] contig = new int[] { start, end - 1 };
+ vcontigs.add(contig);
+ }
+ }
+
+ @Override
+ public boolean hasNext()
+ {
+ return (currentPosition < vcontigs.size());
+ }
+
+ @Override
+ public int[] next()
+ {
+ int[] result = vcontigs.get(currentPosition);
+ currentPosition++;
+ return result;
+ }
+
+ public boolean endsAtHidden()
+ {
+ return endsAtHidden;
+ }
+}
+