Moving the wallpaper offset interpolator to background thread (d0c3d3a5) · Commits · e / os / android_packages_apps_Trebuchet

src/com/android/launcher3/Launcher.java

+0 −1

Original line number	Diff line number	Diff line
		@@ -945,7 +945,6 @@ public class Launcher extends BaseActivity
		}

		updateInteraction(Workspace.State.NORMAL, mWorkspace.getState());
		mWorkspace.onResume();

		// Process any items that were added while Launcher was away.
		InstallShortcutReceiver.disableAndFlushInstallQueue(

src/com/android/launcher3/Workspace.java

+0 −4

Original line number	Diff line number	Diff line
		@@ -1459,10 +1459,6 @@ public class Workspace extends PagedView
		mWallpaperOffset.setWindowToken(null);
		}

		protected void onResume() {
		mWallpaperOffset.onResume();
		}

		@Override
		protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
		if (mUnlockWallpaperFromDefaultPageOnLayout) {

src/com/android/launcher3/util/WallpaperOffsetInterpolator.java

+164 −131

Original line number	Diff line number	Diff line
		package com.android.launcher3.util;

		import android.app.WallpaperManager;
		import android.content.BroadcastReceiver;
		import android.content.Context;
		import android.content.Intent;
		import android.content.IntentFilter;
		import android.os.Handler;
		import android.os.IBinder;
		import android.os.Message;
		import android.os.SystemClock;
		import android.util.Log;
		import android.view.Choreographer;
		import android.view.animation.DecelerateInterpolator;
		import android.view.animation.Interpolator;

		@@ -13,60 +19,30 @@ import com.android.launcher3.Workspace;
		/**
		* Utility class to handle wallpaper scrolling along with workspace.
		*/
		public class WallpaperOffsetInterpolator implements Choreographer.FrameCallback {
		public class WallpaperOffsetInterpolator extends BroadcastReceiver {

		private static final int[] sTempInt = new int[2];
		private static final String TAG = "WPOffsetInterpolator";
		private static final int ANIMATION_DURATION = 250;

		// Don't use all the wallpaper for parallax until you have at least this many pages
		private static final int MIN_PARALLAX_PAGE_SPAN = 4;

		private final Choreographer mChoreographer;
		private final Interpolator mInterpolator;
		private final WallpaperManager mWallpaperManager;
		private final Workspace mWorkspace;
		private final boolean mIsRtl;
		private final Handler mHandler;

		private boolean mRegistered = false;
		private IBinder mWindowToken;
		private boolean mWallpaperIsLiveWallpaper;
		private float mLastSetWallpaperOffsetSteps = 0;

		private float mFinalOffset = 0.0f;
		private float mCurrentOffset = 0.5f; // to force an initial update
		private boolean mWaitingForUpdate;
		private boolean mLockedToDefaultPage;

		private boolean mAnimating;
		private long mAnimationStartTime;
		private float mAnimationStartOffset;
		int mNumScreens;
		int mNumPagesForWallpaperParallax;
		private int mNumScreens;

		public WallpaperOffsetInterpolator(Workspace workspace) {
		mChoreographer = Choreographer.getInstance();
		mInterpolator = new DecelerateInterpolator(1.5f);

		mWorkspace = workspace;
		mWallpaperManager = WallpaperManager.getInstance(workspace.getContext());
		mIsRtl = Utilities.isRtl(workspace.getResources());
		}

		@Override
		public void doFrame(long frameTimeNanos) {
		updateOffset(false);
		}

		private void updateOffset(boolean force) {
		if (mWaitingForUpdate \|\| force) {
		mWaitingForUpdate = false;
		if (computeScrollOffset() && mWindowToken != null) {
		try {
		mWallpaperManager.setWallpaperOffsets(mWindowToken, getCurrX(), 0.5f);
		setWallpaperOffsetSteps();
		} catch (IllegalArgumentException e) {
		Log.e(TAG, "Error updating wallpaper offset: " + e);
		}
		}
		}
		mHandler = new OffsetHandler(workspace.getContext());
		}

		/**
		@@ -80,46 +56,25 @@ public class WallpaperOffsetInterpolator implements Choreographer.FrameCallback
		return mLockedToDefaultPage;
		}

		public boolean computeScrollOffset() {
		final float oldOffset = mCurrentOffset;
		if (mAnimating) {
		long durationSinceAnimation = System.currentTimeMillis() - mAnimationStartTime;
		float t0 = durationSinceAnimation / (float) ANIMATION_DURATION;
		float t1 = mInterpolator.getInterpolation(t0);
		mCurrentOffset = mAnimationStartOffset +
		(mFinalOffset - mAnimationStartOffset) * t1;
		mAnimating = durationSinceAnimation < ANIMATION_DURATION;
		} else {
		mCurrentOffset = mFinalOffset;
		}

		if (Math.abs(mCurrentOffset - mFinalOffset) > 0.0000001f) {
		scheduleUpdate();
		}
		if (Math.abs(oldOffset - mCurrentOffset) > 0.0000001f) {
		return true;
		}
		return false;
		}

		/**
		* Computes the wallpaper offset as an int ratio (out[0] / out[1])
		*
		* TODO: do different behavior if it's a live wallpaper?
		*/
		public float wallpaperOffsetForScroll(int scroll) {
		private void wallpaperOffsetForScroll(int scroll, int numScrollingPages, final int[] out) {
		out[1] = 1;

		// To match the default wallpaper behavior in the system, we default to either the left
		// or right edge on initialization
		int numScrollingPages = getNumScreensExcludingEmpty();
		if (mLockedToDefaultPage \|\| numScrollingPages <= 1) {
		return mIsRtl ? 1f : 0f;
		out[0] = mIsRtl ? 1 : 0;
		return;
		}

		// Distribute the wallpaper parallax over a minimum of MIN_PARALLAX_PAGE_SPAN workspace
		// screens, not including the custom screen, and empty screens (if > MIN_PARALLAX_PAGE_SPAN)
		if (mWallpaperIsLiveWallpaper) {
		mNumPagesForWallpaperParallax = numScrollingPages;
		} else {
		mNumPagesForWallpaperParallax = Math.max(MIN_PARALLAX_PAGE_SPAN, numScrollingPages);
		}
		int numPagesForWallpaperParallax = mWallpaperIsLiveWallpaper ? numScrollingPages :
		Math.max(MIN_PARALLAX_PAGE_SPAN, numScrollingPages);

		// Offset by the custom screen
		int leftPageIndex;
		@@ -136,106 +91,184 @@ public class WallpaperOffsetInterpolator implements Choreographer.FrameCallback
		int leftPageScrollX = mWorkspace.getScrollForPage(leftPageIndex);
		int rightPageScrollX = mWorkspace.getScrollForPage(rightPageIndex);
		int scrollRange = rightPageScrollX - leftPageScrollX;
		if (scrollRange == 0) {
		return 0f;
		if (scrollRange <= 0) {
		out[0] = 0;
		return;
		}

		// Sometimes the left parameter of the pages is animated during a layout transition;
		// this parameter offsets it to keep the wallpaper from animating as well
		int adjustedScroll = scroll - leftPageScrollX -
		mWorkspace.getLayoutTransitionOffsetForPage(0);
		float offset = Utilities.boundToRange((float) adjustedScroll / scrollRange, 0f, 1f);
		adjustedScroll = Utilities.boundToRange(adjustedScroll, 0, scrollRange);
		out[1] = (numPagesForWallpaperParallax - 1) * scrollRange;

		// The offset is now distributed 0..1 between the left and right pages that we care about,
		// so we just map that between the pages that we are using for parallax
		float rtlOffset = 0;
		int rtlOffset = 0;
		if (mIsRtl) {
		// In RTL, the pages are right aligned, so adjust the offset from the end
		rtlOffset = (float) ((mNumPagesForWallpaperParallax - 1) - (numScrollingPages - 1)) /
		(mNumPagesForWallpaperParallax - 1);
		rtlOffset = out[1] - (numScrollingPages - 1) * scrollRange;
		}
		return rtlOffset + offset *
		((float) (numScrollingPages - 1) / (mNumPagesForWallpaperParallax - 1));
		out[0] = rtlOffset + adjustedScroll * (numScrollingPages - 1);
		}

		private float wallpaperOffsetForCurrentScroll() {
		return wallpaperOffsetForScroll(mWorkspace.getScrollX());
		public float wallpaperOffsetForScroll(int scroll) {
		wallpaperOffsetForScroll(scroll, getNumScreensExcludingEmpty(), sTempInt);
		return ((float) sTempInt[0]) / sTempInt[1];
		}

		private int numEmptyScreensToIgnore() {
		private int getNumScreensExcludingEmpty() {
		int numScrollingPages = mWorkspace.getChildCount();
		if (numScrollingPages >= MIN_PARALLAX_PAGE_SPAN && mWorkspace.hasExtraEmptyScreen()) {
		return 1;
		return numScrollingPages - 1;
		} else {
		return 0;
		return numScrollingPages;
		}
		}

		private int getNumScreensExcludingEmpty() {
		return mWorkspace.getChildCount() - numEmptyScreensToIgnore();
		public void syncWithScroll() {
		int numScreens = getNumScreensExcludingEmpty();
		wallpaperOffsetForScroll(mWorkspace.getScrollX(), numScreens, sTempInt);
		Message msg = Message.obtain(mHandler, MSG_UPDATE_OFFSET, sTempInt[0], sTempInt[1],
		mWindowToken);
		if (numScreens != mNumScreens) {
		if (mNumScreens > 0) {
		// Don't animate if we're going from 0 screens
		msg.what = MSG_START_ANIMATION;
		}
		mNumScreens = numScreens;
		updateOffset();
		}
		msg.sendToTarget();
		}

		public void syncWithScroll() {
		float offset = wallpaperOffsetForCurrentScroll();
		setFinalX(offset);
		updateOffset(true);
		private void updateOffset() {
		int numPagesForWallpaperParallax;
		if (mWallpaperIsLiveWallpaper) {
		numPagesForWallpaperParallax = mNumScreens;
		} else {
		numPagesForWallpaperParallax = Math.max(MIN_PARALLAX_PAGE_SPAN, mNumScreens);
		}
		Message.obtain(mHandler, MSG_SET_NUM_PARALLAX, numPagesForWallpaperParallax, 0,
		mWindowToken).sendToTarget();
		}

		public float getCurrX() {
		return mCurrentOffset;
		public void jumpToFinal() {
		Message.obtain(mHandler, MSG_JUMP_TO_FINAL, mWindowToken).sendToTarget();
		}

		public float getFinalX() {
		return mFinalOffset;
		public void setWindowToken(IBinder token) {
		mWindowToken = token;
		if (mWindowToken == null && mRegistered) {
		mWorkspace.getContext().unregisterReceiver(this);
		mRegistered = false;
		} else if (mWindowToken != null && !mRegistered) {
		mWorkspace.getContext()
		.registerReceiver(this, new IntentFilter(Intent.ACTION_WALLPAPER_CHANGED));
		onReceive(mWorkspace.getContext(), null);
		mRegistered = true;
		}
		}

		private void animateToFinal() {
		mAnimating = true;
		mAnimationStartOffset = mCurrentOffset;
		mAnimationStartTime = System.currentTimeMillis();
		@Override
		public void onReceive(Context context, Intent intent) {
		mWallpaperIsLiveWallpaper =
		WallpaperManager.getInstance(mWorkspace.getContext()).getWallpaperInfo() != null;
		updateOffset();
		}

		private void setWallpaperOffsetSteps() {
		// Set wallpaper offset steps (1 / (number of screens - 1))
		float xOffset = 1.0f / (mNumPagesForWallpaperParallax - 1);
		if (xOffset != mLastSetWallpaperOffsetSteps) {
		mWallpaperManager.setWallpaperOffsetSteps(xOffset, 1.0f);
		mLastSetWallpaperOffsetSteps = xOffset;
		private static final int MSG_START_ANIMATION = 1;
		private static final int MSG_UPDATE_OFFSET = 2;
		private static final int MSG_APPLY_OFFSET = 3;
		private static final int MSG_SET_NUM_PARALLAX = 4;
		private static final int MSG_JUMP_TO_FINAL = 5;

		private static class OffsetHandler extends Handler {

		private final Interpolator mInterpolator;
		private final WallpaperManager mWM;

		private float mCurrentOffset = 0.5f; // to force an initial update
		private boolean mAnimating;
		private long mAnimationStartTime;
		private float mAnimationStartOffset;

		private float mFinalOffset;
		private float mOffsetX;

		public OffsetHandler(Context context) {
		super(UiThreadHelper.getBackgroundLooper());
		mInterpolator = new DecelerateInterpolator(1.5f);
		mWM = WallpaperManager.getInstance(context);
		}

		@Override
		public void handleMessage(Message msg) {
		final IBinder token = (IBinder) msg.obj;
		if (token == null) {
		return;
		}

		public void setFinalX(float x) {
		scheduleUpdate();
		mFinalOffset = Math.max(0f, Math.min(x, 1f));
		if (getNumScreensExcludingEmpty() != mNumScreens) {
		if (mNumScreens > 0 && Float.compare(mCurrentOffset, mFinalOffset) != 0) {
		// Don't animate if we're going from 0 screens, or if the final offset is the same
		// as the current offset
		animateToFinal();
		switch (msg.what) {
		case MSG_START_ANIMATION: {
		mAnimating = true;
		mAnimationStartOffset = mCurrentOffset;
		mAnimationStartTime = msg.getWhen();
		// Follow through
		}
		case MSG_UPDATE_OFFSET:
		mFinalOffset = ((float) msg.arg1) / msg.arg2;
		// Follow through
		case MSG_APPLY_OFFSET: {
		float oldOffset = mCurrentOffset;
		if (mAnimating) {
		long durationSinceAnimation = SystemClock.uptimeMillis()
		- mAnimationStartTime;
		float t0 = durationSinceAnimation / (float) ANIMATION_DURATION;
		float t1 = mInterpolator.getInterpolation(t0);
		mCurrentOffset = mAnimationStartOffset +
		(mFinalOffset - mAnimationStartOffset) * t1;
		mAnimating = durationSinceAnimation < ANIMATION_DURATION;
		} else {
		mCurrentOffset = mFinalOffset;
		}
		mNumScreens = getNumScreensExcludingEmpty();

		if (Float.compare(mCurrentOffset, oldOffset) != 0) {
		setOffsetSafely(token);
		// Force the wallpaper offset steps to be set again, because another app
		// might have changed them
		mWM.setWallpaperOffsetSteps(mOffsetX, 1.0f);
		}
		if (mAnimating) {
		// If we are animating, keep updating the offset
		Message.obtain(this, MSG_APPLY_OFFSET, token).sendToTarget();
		}

		private void scheduleUpdate() {
		if (!mWaitingForUpdate) {
		mChoreographer.postFrameCallback(this);
		mWaitingForUpdate = true;
		return;
		}
		case MSG_SET_NUM_PARALLAX: {
		// Set wallpaper offset steps (1 / (number of screens - 1))
		mOffsetX = 1.0f / (msg.arg1 - 1);
		mWM.setWallpaperOffsetSteps(mOffsetX, 1.0f);
		return;
		}

		public void jumpToFinal() {
		case MSG_JUMP_TO_FINAL: {
		if (Float.compare(mCurrentOffset, mFinalOffset) != 0) {
		mCurrentOffset = mFinalOffset;
		setOffsetSafely(token);
		}
		mAnimating = false;
		return;
		}
		}

		public void onResume() {
		mWallpaperIsLiveWallpaper = mWallpaperManager.getWallpaperInfo() != null;
		// Force the wallpaper offset steps to be set again, because another app might have changed
		// them
		mLastSetWallpaperOffsetSteps = 0f;
		}

		public void setWindowToken(IBinder token) {
		mWindowToken = token;
		private void setOffsetSafely(IBinder token) {
		try {
		mWM.setWallpaperOffsets(token, mCurrentOffset, 0.5f);
		} catch (IllegalArgumentException e) {
		Log.e(TAG, "Error updating wallpaper offset: " + e);
		}
		}
		}
		}
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