JAL-3253-applet JAL-3383 Overview

[jalview.git] / src / jalview / util / ColorUtils.java

diff --git a/src/jalview/util/ColorUtils.java b/src/jalview/util/ColorUtils.java
index d4be322..a2d8d3e 100644 (file)
--- a/src/jalview/util/ColorUtils.java
+++ b/src/jalview/util/ColorUtils.java
@@ -25,10 +25,17 @@
 package jalview.util;
 
 import java.awt.Color;
+import java.util.HashMap;
+import java.util.Map;
 import java.util.Random;
 
 public class ColorUtils
 {
+  private static final int MAX_CACHE_SIZE = 1729;
+  /*
+   * a cache for colours generated from text strings
+   */
+  static Map<String, Color> myColours = new HashMap<>();
 
   /**
    * Generates a random color, will mix with input color. Code taken from
@@ -192,6 +199,42 @@ public class ColorUtils
     }
   }
 
+  public static int bleachColourInt(int colour, float bleachFactor)
+  {
+    if (bleachFactor >= 1f)
+    {
+      return -1;// Color.WHITE;
+    }
+    if (bleachFactor <= -1f)
+    {
+      return 0xFF000000;// Color.BLACK;
+    }
+    if (bleachFactor == 0f)
+    {
+      return colour;
+    }
+
+    int red = (colour >> 16) & 0xFF;// getRed();
+    int green = (colour >> 8) & 0xFF;// colour.getGreen();
+    int blue = colour & 0xFF;// .getBlue();
+
+    if (bleachFactor > 0)
+    {
+      red += (255 - red) * bleachFactor;
+      green += (255 - green) * bleachFactor;
+      blue += (255 - blue) * bleachFactor;
+    }
+    else
+    {
+      float factor = 1 + bleachFactor;
+      red *= factor;
+      green *= factor;
+      blue *= factor;
+    }
+    return 0xFF000000 | (red << 16) | (green << 8) | blue;// new Color(red,
+                                                          // green, blue);
+  }
+
   /**
    * Parses a string into a Color, where the accepted formats are
    * <ul>
@@ -218,6 +261,7 @@ public class ColorUtils
       col = new Color(value);
     } catch (NumberFormatException ex)
     {
+      col = Platform.getColorFromName(colour);
     }
 
     if (col == null)
@@ -260,6 +304,10 @@ public class ColorUtils
     {
       return Color.white;
     }
+    if (myColours.containsKey(name))
+    {
+      return myColours.get(name);
+    }
     int lsize = name.length();
     int start = 0;
     int end = lsize / 3;
@@ -291,6 +339,11 @@ public class ColorUtils
 
     Color color = new Color(r, g, b);
 
+    if (myColours.size() < MAX_CACHE_SIZE)
+    {
+      myColours.put(name, color);
+    }
+
     return color;
   }
 
@@ -303,57 +356,8 @@ public class ColorUtils
    */
   public static Color getAWTColorFromName(String name)
   {
-    if (name == null)
-    {
-      return null;
-    }
-    Color col = null;
-    name = name.toLowerCase();
-
-    // or make a static map; or use reflection on the field name
-    switch (name)
-    {
-    case "black":
-      col = Color.black;
-      break;
-    case "blue":
-      col = Color.blue;
-      break;
-    case "cyan":
-      col = Color.cyan;
-      break;
-    case "darkgray":
-      col = Color.darkGray;
-      break;
-    case "gray":
-      col = Color.gray;
-      break;
-    case "green":
-      col = Color.green;
-      break;
-    case "lightgray":
-      col = Color.lightGray;
-      break;
-    case "magenta":
-      col = Color.magenta;
-      break;
-    case "orange":
-      col = Color.orange;
-      break;
-    case "pink":
-      col = Color.pink;
-      break;
-    case "red":
-      col = Color.red;
-      break;
-    case "white":
-      col = Color.white;
-      break;
-    case "yellow":
-      col = Color.yellow;
-      break;
-    }
-
-    return col;
+    return Platform.getColorFromName(name); // BH 2019 -- allows for wide range
+                                            // of JavaScript colors (for
+                                            // JavaScript only)
   }
 }