Merge remote-tracking branch 'origin/develop' into features/JAL-2316
[jalview.git] / src / jalview / schemes / ColourSchemes.java
diff --git a/src/jalview/schemes/ColourSchemes.java b/src/jalview/schemes/ColourSchemes.java
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+package jalview.schemes;
+
+import jalview.binding.JalviewUserColours;
+import jalview.datamodel.AnnotatedCollectionI;
+import jalview.datamodel.SequenceCollectionI;
+import jalview.datamodel.SequenceI;
+
+import java.awt.Color;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.InputStreamReader;
+import java.util.LinkedHashMap;
+import java.util.Map;
+
+public class ColourSchemes
+{
+  /*
+   * singleton instance of this class
+   */
+  private static ColourSchemes instance = new ColourSchemes();
+
+  /*
+   * a map from scheme name to an instance of it
+   */
+  private Map<String, ColourSchemeI> schemes;
+
+  /**
+   * Returns the singleton instance of this class
+   * 
+   * @return
+   */
+  public static ColourSchemes getInstance()
+  {
+    return instance;
+  }
+
+  private ColourSchemes()
+  {
+    loadColourSchemes();
+  }
+
+  /**
+   * Loads an instance of each standard or user-defined colour scheme
+   * 
+   * @return
+   */
+  void loadColourSchemes()
+  {
+    /*
+     * store in an order-preserving map, so items can be added to menus 
+     * in the order in which they are 'discovered'
+     */
+    schemes = new LinkedHashMap<String, ColourSchemeI>();
+
+    for (JalviewColourScheme cs : JalviewColourScheme.values())
+    {
+      try
+      {
+        registerColourScheme(cs.getSchemeClass().newInstance());
+      } catch (InstantiationException | IllegalAccessException e)
+      {
+        System.err.println("Error instantiating colour scheme for "
+                + cs.toString() + " " + e.getMessage());
+      }
+    }
+  }
+
+  /**
+   * Registers a colour scheme
+   * 
+   * @param cs
+   */
+  public void registerColourScheme(ColourSchemeI cs)
+  {
+    String name = cs.getSchemeName();
+    if (name == null)
+    {
+      System.err.println("ColourScheme name may not be null");
+      return;
+    }
+
+    /*
+     * name is lower-case for non-case-sensitive lookup
+     * (name in the colour keeps its true case)
+     */
+    String lower = name.toLowerCase();
+    if (schemes.containsKey(lower))
+    {
+      System.err
+              .println("Warning: overwriting colour scheme named " + name);
+    }
+    schemes.put(lower, cs);
+  }
+
+  /**
+   * Removes a colour scheme by name
+   * 
+   * @param name
+   */
+  public void removeColourScheme(String name)
+  {
+    schemes.remove(name);
+  }
+  
+  /**
+   * Returns an instance of the colour scheme with which the given view may be
+   * coloured
+   * 
+   * @param name
+   *          name of the colour scheme
+   * @param forData
+   *          the data to be coloured
+   * @param optional
+   *          map from hidden representative sequences to the sequences they
+   *          represent
+   * @return
+   */
+  public ColourSchemeI getColourScheme(String name,
+          AnnotatedCollectionI forData,
+          Map<SequenceI, SequenceCollectionI> hiddenRepSequences)
+  {
+    if (name == null)
+    {
+      return null;
+    }
+    ColourSchemeI cs = schemes.get(name.toLowerCase());
+    return cs == null ? null : cs.getInstance(forData, hiddenRepSequences);
+  }
+
+  /**
+   * Returns an instance of the colour scheme with which the given view may be
+   * coloured
+   * 
+   * @param name
+   *          name of the colour scheme
+   * @param forData
+   *          the data to be coloured
+   * @return
+   */
+  public ColourSchemeI getColourScheme(String name,
+          AnnotatedCollectionI forData)
+  {
+    return getColourScheme(name, forData, null);
+  }
+
+  /**
+   * Returns an iterable set of the colour schemes, in the order in which they
+   * were added
+   * 
+   * @return
+   */
+  public Iterable<ColourSchemeI> getColourSchemes()
+  {
+    return schemes.values();
+  }
+
+  /**
+   * Answers true if there is a scheme with the given name, else false. The test
+   * is not case-sensitive.
+   * 
+   * @param name
+   * @return
+   */
+  public boolean nameExists(String name)
+  {
+    if (name == null)
+    {
+      return false;
+    }
+    name = name.toLowerCase();
+    for (ColourSchemeI scheme : getColourSchemes())
+    {
+      if (name.equals(scheme.getSchemeName().toLowerCase()))
+      {
+        return true;
+      }
+    }
+    return false;
+  }
+
+  /**
+   * Loads a user defined colour scheme from file. The file should contain a
+   * definition of residue colours in XML format as defined in
+   * JalviewUserColours.xsd.
+   * 
+   * @param filePath
+   * 
+   * @return
+   */
+  public static UserColourScheme loadColourScheme(String filePath)
+  {
+    UserColourScheme ucs = null;
+    Color[] newColours = null;
+    File file = new File(filePath);
+    try
+    {
+      InputStreamReader in = new InputStreamReader(
+              new FileInputStream(file), "UTF-8");
+  
+      jalview.schemabinding.version2.JalviewUserColours jucs = new jalview.schemabinding.version2.JalviewUserColours();
+  
+      org.exolab.castor.xml.Unmarshaller unmar = new org.exolab.castor.xml.Unmarshaller(
+              jucs);
+      jucs = (jalview.schemabinding.version2.JalviewUserColours) unmar
+              .unmarshal(in);
+  
+      /*
+       * non-case-sensitive colours are for 20 amino acid codes,
+       * B, Z, X and Gap
+       * optionally, lower-case alternatives for all except Gap
+       */
+      newColours = new Color[24];
+      Color[] lowerCase = new Color[23];
+      boolean caseSensitive = false;
+  
+      String name;
+      int index;
+      for (int i = 0; i < jucs.getColourCount(); i++)
+      {
+        name = jucs.getColour(i).getName();
+        if (ResidueProperties.aa3Hash.containsKey(name))
+        {
+          index = ResidueProperties.aa3Hash.get(name).intValue();
+        }
+        else
+        {
+          index = ResidueProperties.aaIndex[name.charAt(0)];
+        }
+        if (index == -1)
+        {
+          continue;
+        }
+  
+        Color color = new Color(Integer.parseInt(jucs.getColour(i)
+                .getRGB(), 16));
+        if (name.toLowerCase().equals(name))
+        {
+          caseSensitive = true;
+          lowerCase[index] = color;
+        }
+        else
+        {
+          newColours[index] = color;
+        }
+      }
+  
+      /*
+       * instantiate the colour scheme
+       */
+      ucs = new UserColourScheme(newColours);
+      ucs.setName(jucs.getSchemeName());
+      if (caseSensitive)
+      {
+        ucs.setLowerCaseColours(lowerCase);
+      }
+    } catch (Exception ex)
+    {
+      // Could be old Jalview Archive format
+      try
+      {
+        InputStreamReader in = new InputStreamReader(new FileInputStream(
+                file), "UTF-8");
+  
+        jalview.binding.JalviewUserColours jucs = new jalview.binding.JalviewUserColours();
+  
+        jucs = JalviewUserColours.unmarshal(in);
+  
+        newColours = new Color[jucs.getColourCount()];
+  
+        for (int i = 0; i < 24; i++)
+        {
+          newColours[i] = new Color(Integer.parseInt(jucs.getColour(i)
+                  .getRGB(), 16));
+        }
+        ucs = new UserColourScheme(newColours);
+        ucs.setName(jucs.getSchemeName());
+      } catch (Exception ex2)
+      {
+        ex2.printStackTrace();
+      }
+  
+      if (newColours == null)
+      {
+        System.out.println("Error loading User ColourFile\n" + ex);
+      }
+    }
+  
+    return ucs;
+  }
+}