Import Android SDK Platform PI [4335822]
/google/data/ro/projects/android/fetch_artifact \
--bid 4335822 \
--target sdk_phone_armv7-win_sdk \
sdk-repo-linux-sources-4335822.zip
AndroidVersion.ApiLevel has been modified to appear as 28
Change-Id: Ic8f04be005a71c2b9abeaac754d8da8d6f9a2c32
diff --git a/android/support/transition/PatternPathMotion.java b/android/support/transition/PatternPathMotion.java
new file mode 100644
index 0000000..2ac6e72
--- /dev/null
+++ b/android/support/transition/PatternPathMotion.java
@@ -0,0 +1,148 @@
+/*
+ * Copyright (C) 2017 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 android.support.transition;
+
+import android.content.Context;
+import android.content.res.TypedArray;
+import android.graphics.Matrix;
+import android.graphics.Path;
+import android.graphics.PathMeasure;
+import android.support.v4.content.res.TypedArrayUtils;
+import android.support.v4.graphics.PathParser;
+import android.util.AttributeSet;
+
+import org.xmlpull.v1.XmlPullParser;
+
+/**
+ * A PathMotion that takes a Path pattern and applies it to the separation between two points.
+ * The starting point of the Path will be moved to the origin and the end point will be scaled
+ * and rotated so that it matches with the target end point.
+ * <p>This may be used in XML as an element inside a transition.</p>
+ * <pre>{@code
+ * <changeBounds>
+ * <patternPathMotion android:patternPathData="M0 0 L0 100 L100 100"/>
+ * </changeBounds>}
+ * </pre>
+ */
+public class PatternPathMotion extends PathMotion {
+
+ private Path mOriginalPatternPath;
+
+ private final Path mPatternPath = new Path();
+
+ private final Matrix mTempMatrix = new Matrix();
+
+ /**
+ * Constructs a PatternPathMotion with a straight-line pattern.
+ */
+ public PatternPathMotion() {
+ mPatternPath.lineTo(1, 0);
+ mOriginalPatternPath = mPatternPath;
+ }
+
+ public PatternPathMotion(Context context, AttributeSet attrs) {
+ TypedArray a = context.obtainStyledAttributes(attrs, Styleable.PATTERN_PATH_MOTION);
+ try {
+ String pathData = TypedArrayUtils.getNamedString(a, (XmlPullParser) attrs,
+ "patternPathData", Styleable.PatternPathMotion.PATTERN_PATH_DATA);
+ if (pathData == null) {
+ throw new RuntimeException("pathData must be supplied for patternPathMotion");
+ }
+ Path pattern = PathParser.createPathFromPathData(pathData);
+ setPatternPath(pattern);
+ } finally {
+ a.recycle();
+ }
+ }
+
+ /**
+ * Creates a PatternPathMotion with the Path defining a pattern of motion between two
+ * coordinates. The pattern will be translated, rotated, and scaled to fit between the start
+ * and end points. The pattern must not be empty and must have the end point differ from the
+ * start point.
+ *
+ * @param patternPath A Path to be used as a pattern for two-dimensional motion.
+ */
+ public PatternPathMotion(Path patternPath) {
+ setPatternPath(patternPath);
+ }
+
+ /**
+ * Returns the Path defining a pattern of motion between two coordinates.
+ * The pattern will be translated, rotated, and scaled to fit between the start and end points.
+ * The pattern must not be empty and must have the end point differ from the start point.
+ *
+ * @return the Path defining a pattern of motion between two coordinates.
+ */
+ public Path getPatternPath() {
+ return mOriginalPatternPath;
+ }
+
+ /**
+ * Sets the Path defining a pattern of motion between two coordinates.
+ * The pattern will be translated, rotated, and scaled to fit between the start and end points.
+ * The pattern must not be empty and must have the end point differ from the start point.
+ *
+ * @param patternPath A Path to be used as a pattern for two-dimensional motion.
+ */
+ public void setPatternPath(Path patternPath) {
+ PathMeasure pathMeasure = new PathMeasure(patternPath, false);
+ float length = pathMeasure.getLength();
+ float[] pos = new float[2];
+ pathMeasure.getPosTan(length, pos, null);
+ float endX = pos[0];
+ float endY = pos[1];
+ pathMeasure.getPosTan(0, pos, null);
+ float startX = pos[0];
+ float startY = pos[1];
+
+ if (startX == endX && startY == endY) {
+ throw new IllegalArgumentException("pattern must not end at the starting point");
+ }
+
+ mTempMatrix.setTranslate(-startX, -startY);
+ float dx = endX - startX;
+ float dy = endY - startY;
+ float distance = distance(dx, dy);
+ float scale = 1 / distance;
+ mTempMatrix.postScale(scale, scale);
+ double angle = Math.atan2(dy, dx);
+ mTempMatrix.postRotate((float) Math.toDegrees(-angle));
+ patternPath.transform(mTempMatrix, mPatternPath);
+ mOriginalPatternPath = patternPath;
+ }
+
+ @Override
+ public Path getPath(float startX, float startY, float endX, float endY) {
+ float dx = endX - startX;
+ float dy = endY - startY;
+ float length = distance(dx, dy);
+ double angle = Math.atan2(dy, dx);
+
+ mTempMatrix.setScale(length, length);
+ mTempMatrix.postRotate((float) Math.toDegrees(angle));
+ mTempMatrix.postTranslate(startX, startY);
+ Path path = new Path();
+ mPatternPath.transform(mTempMatrix, path);
+ return path;
+ }
+
+ private static float distance(float x, float y) {
+ return (float) Math.sqrt((x * x) + (y * y));
+ }
+
+}
