Merge commit '42b2e5ca519766e37ce6941ba4faecc9691cc403' into upstream

[debian/openrocket] / android-libraries / ActionBarSherlock / src / com / actionbarsherlock / internal / nineoldandroids / animation / IntKeyframeSet.java

diff --git a/android-libraries/ActionBarSherlock/src/com/actionbarsherlock/internal/nineoldandroids/animation/IntKeyframeSet.java b/android-libraries/ActionBarSherlock/src/com/actionbarsherlock/internal/nineoldandroids/animation/IntKeyframeSet.java
new file mode 100644 (file)
index 0000000..e9215e7
--- /dev/null
+++ b/android-libraries/ActionBarSherlock/src/com/actionbarsherlock/internal/nineoldandroids/animation/IntKeyframeSet.java
@@ -0,0 +1,135 @@
+/*
+ * Copyright (C) 2010 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.actionbarsherlock.internal.nineoldandroids.animation;
+
+import java.util.ArrayList;
+import android.view.animation.Interpolator;
+
+import com.actionbarsherlock.internal.nineoldandroids.animation.Keyframe.IntKeyframe;
+
+/**
+ * This class holds a collection of IntKeyframe objects and is called by ValueAnimator to calculate
+ * values between those keyframes for a given animation. The class internal to the animation
+ * package because it is an implementation detail of how Keyframes are stored and used.
+ *
+ * <p>This type-specific subclass of KeyframeSet, along with the other type-specific subclass for
+ * float, exists to speed up the getValue() method when there is no custom
+ * TypeEvaluator set for the animation, so that values can be calculated without autoboxing to the
+ * Object equivalents of these primitive types.</p>
+ */
+@SuppressWarnings("unchecked")
+class IntKeyframeSet extends KeyframeSet {
+    private int firstValue;
+    private int lastValue;
+    private int deltaValue;
+    private boolean firstTime = true;
+
+    public IntKeyframeSet(IntKeyframe... keyframes) {
+        super(keyframes);
+    }
+
+    @Override
+    public Object getValue(float fraction) {
+        return getIntValue(fraction);
+    }
+
+    @Override
+    public IntKeyframeSet clone() {
+        ArrayList<Keyframe> keyframes = mKeyframes;
+        int numKeyframes = mKeyframes.size();
+        IntKeyframe[] newKeyframes = new IntKeyframe[numKeyframes];
+        for (int i = 0; i < numKeyframes; ++i) {
+            newKeyframes[i] = (IntKeyframe) keyframes.get(i).clone();
+        }
+        IntKeyframeSet newSet = new IntKeyframeSet(newKeyframes);
+        return newSet;
+    }
+
+    public int getIntValue(float fraction) {
+        if (mNumKeyframes == 2) {
+            if (firstTime) {
+                firstTime = false;
+                firstValue = ((IntKeyframe) mKeyframes.get(0)).getIntValue();
+                lastValue = ((IntKeyframe) mKeyframes.get(1)).getIntValue();
+                deltaValue = lastValue - firstValue;
+            }
+            if (mInterpolator != null) {
+                fraction = mInterpolator.getInterpolation(fraction);
+            }
+            if (mEvaluator == null) {
+                return firstValue + (int)(fraction * deltaValue);
+            } else {
+                return ((Number)mEvaluator.evaluate(fraction, firstValue, lastValue)).intValue();
+            }
+        }
+        if (fraction <= 0f) {
+            final IntKeyframe prevKeyframe = (IntKeyframe) mKeyframes.get(0);
+            final IntKeyframe nextKeyframe = (IntKeyframe) mKeyframes.get(1);
+            int prevValue = prevKeyframe.getIntValue();
+            int nextValue = nextKeyframe.getIntValue();
+            float prevFraction = prevKeyframe.getFraction();
+            float nextFraction = nextKeyframe.getFraction();
+            final /*Time*/Interpolator interpolator = nextKeyframe.getInterpolator();
+            if (interpolator != null) {
+                fraction = interpolator.getInterpolation(fraction);
+            }
+            float intervalFraction = (fraction - prevFraction) / (nextFraction - prevFraction);
+            return mEvaluator == null ?
+                    prevValue + (int)(intervalFraction * (nextValue - prevValue)) :
+                    ((Number)mEvaluator.evaluate(intervalFraction, prevValue, nextValue)).
+                            intValue();
+        } else if (fraction >= 1f) {
+            final IntKeyframe prevKeyframe = (IntKeyframe) mKeyframes.get(mNumKeyframes - 2);
+            final IntKeyframe nextKeyframe = (IntKeyframe) mKeyframes.get(mNumKeyframes - 1);
+            int prevValue = prevKeyframe.getIntValue();
+            int nextValue = nextKeyframe.getIntValue();
+            float prevFraction = prevKeyframe.getFraction();
+            float nextFraction = nextKeyframe.getFraction();
+            final /*Time*/Interpolator interpolator = nextKeyframe.getInterpolator();
+            if (interpolator != null) {
+                fraction = interpolator.getInterpolation(fraction);
+            }
+            float intervalFraction = (fraction - prevFraction) / (nextFraction - prevFraction);
+            return mEvaluator == null ?
+                    prevValue + (int)(intervalFraction * (nextValue - prevValue)) :
+                    ((Number)mEvaluator.evaluate(intervalFraction, prevValue, nextValue)).intValue();
+        }
+        IntKeyframe prevKeyframe = (IntKeyframe) mKeyframes.get(0);
+        for (int i = 1; i < mNumKeyframes; ++i) {
+            IntKeyframe nextKeyframe = (IntKeyframe) mKeyframes.get(i);
+            if (fraction < nextKeyframe.getFraction()) {
+                final /*Time*/Interpolator interpolator = nextKeyframe.getInterpolator();
+                if (interpolator != null) {
+                    fraction = interpolator.getInterpolation(fraction);
+                }
+                float intervalFraction = (fraction - prevKeyframe.getFraction()) /
+                    (nextKeyframe.getFraction() - prevKeyframe.getFraction());
+                int prevValue = prevKeyframe.getIntValue();
+                int nextValue = nextKeyframe.getIntValue();
+                return mEvaluator == null ?
+                        prevValue + (int)(intervalFraction * (nextValue - prevValue)) :
+                        ((Number)mEvaluator.evaluate(intervalFraction, prevValue, nextValue)).
+                                intValue();
+            }
+            prevKeyframe = nextKeyframe;
+        }
+        // shouldn't get here
+        return ((Number)mKeyframes.get(mNumKeyframes - 1).getValue()).intValue();
+    }
+
+}
+