1 files changed, 129 insertions, 0 deletions
diff --git a/src/com/android/messaging/util/SwitchCompatUtils.java b/src/com/android/messaging/util/SwitchCompatUtils.java
new file mode 100644
index 0000000..b5d1ed5
--- /dev/null
+++ b/src/com/android/messaging/util/SwitchCompatUtils.java
@@ -0,0 +1,129 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.messaging.util;
+
+import android.content.Context;
+import android.content.res.ColorStateList;
+import android.graphics.Color;
+import android.graphics.PorterDuff;
+import android.graphics.drawable.Drawable;
+import android.support.v7.graphics.drawable.DrawableWrapper;
+import android.support.v7.widget.SwitchCompat;
+import android.util.TypedValue;
+
+/* Most methods in this file are copied from
+ * v7/appcompat/src/android/support/v7/internal/widget/TintManager.java. It would be better if
+ * we could have just extended the TintManager but this is a final class that we do not have
+ * access to. */
+
+/**
+ * Util methods for the SwitchCompat widget
+ */
+public class SwitchCompatUtils {
+    /**
+     * Given a color and a SwitchCompat view, updates the SwitchCompat to appear with the appropiate
+     * color when enabled and checked
+     */
+    public static void updateSwitchCompatColor(SwitchCompat switchCompat, final int color) {
+        final Context context = switchCompat.getContext();
+        final TypedValue typedValue = new TypedValue();
+
+        switchCompat.setThumbDrawable(getColorTintedDrawable(switchCompat.getThumbDrawable(),
+                getSwitchThumbColorStateList(context, color, typedValue),
+                PorterDuff.Mode.MULTIPLY));
+
+        switchCompat.setTrackDrawable(getColorTintedDrawable(switchCompat.getTrackDrawable(),
+                getSwitchTrackColorStateList(context, color, typedValue), PorterDuff.Mode.SRC_IN));
+    }
+
+    private static Drawable getColorTintedDrawable(Drawable oldDrawable,
+            final ColorStateList colorStateList, final PorterDuff.Mode mode) {
+        final int[] thumbState = oldDrawable.isStateful() ? oldDrawable.getState() : null;
+        if (oldDrawable instanceof DrawableWrapper) {
+            oldDrawable = ((DrawableWrapper) oldDrawable).getWrappedDrawable();
+        }
+        final Drawable newDrawable = new TintDrawableWrapper(oldDrawable, colorStateList, mode);
+        if (thumbState != null) {
+            newDrawable.setState(thumbState);
+        }
+        return newDrawable;
+    }
+
+    private static ColorStateList getSwitchThumbColorStateList(final Context context,
+            final int color, final TypedValue typedValue) {
+        final int[][] states = new int[3][];
+        final int[] colors = new int[3];
+        int i = 0;
+        // Disabled state
+        states[i] = new int[] { -android.R.attr.state_enabled };
+        colors[i] = getColor(Color.parseColor("#ffbdbdbd"), 1f);
+        i++;
+        states[i] = new int[] { android.R.attr.state_checked };
+        colors[i] = color;
+        i++;
+        // Default enabled state
+        states[i] = new int[0];
+        colors[i] = getThemeAttrColor(context, typedValue,
+                android.support.v7.appcompat.R.attr.colorSwitchThumbNormal);
+        i++;
+        return new ColorStateList(states, colors);
+    }
+
+    private static ColorStateList getSwitchTrackColorStateList(final Context context,
+            final int color, final TypedValue typedValue) {
+        final int[][] states = new int[3][];
+        final int[] colors = new int[3];
+        int i = 0;
+        // Disabled state
+        states[i] = new int[] { -android.R.attr.state_enabled };
+        colors[i] = getThemeAttrColor(context, typedValue, android.R.attr.colorForeground, 0.1f);
+        i++;
+        states[i] = new int[] { android.R.attr.state_checked };
+        colors[i] = getColor(color, 0.3f);
+        i++;
+        // Default enabled state
+        states[i] = new int[0];
+        colors[i] = getThemeAttrColor(context, typedValue, android.R.attr.colorForeground, 0.3f);
+        i++;
+        return new ColorStateList(states, colors);
+    }
+
+    private static int getThemeAttrColor(final Context context, final TypedValue typedValue,
+            final int attr) {
+        if (context.getTheme().resolveAttribute(attr, typedValue, true)) {
+            if (typedValue.type >= TypedValue.TYPE_FIRST_INT
+                    && typedValue.type <= TypedValue.TYPE_LAST_INT) {
+                return typedValue.data;
+            } else if (typedValue.type == TypedValue.TYPE_STRING) {
+                return context.getResources().getColor(typedValue.resourceId);
+            }
+        }
+        return 0;
+    }
+
+    private static int getThemeAttrColor(final Context context, final TypedValue typedValue,
+            final int attr, final float alpha) {
+        final int color = getThemeAttrColor(context, typedValue, attr);
+        return getColor(color, alpha);
+    }
+
+    private static int getColor(int color, float alpha) {
+        final int originalAlpha = Color.alpha(color);
+        // Return the color, multiplying the original alpha by the disabled value
+        return (color & 0x00ffffff) | (Math.round(originalAlpha * alpha) << 24);
+    }
+}