/* * Copyright (C) 2019 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.wallpaper.picker; import static android.view.View.MeasureSpec.EXACTLY; import static android.view.View.MeasureSpec.makeMeasureSpec; import static com.android.wallpaper.widget.BottomActionBar.BottomAction.APPLY; import static com.android.wallpaper.widget.BottomActionBar.BottomAction.EDIT; import static com.android.wallpaper.widget.BottomActionBar.BottomAction.INFORMATION; import android.animation.Animator; import android.animation.AnimatorListenerAdapter; import android.app.Activity; import android.content.Context; import android.content.res.Resources; import android.graphics.Bitmap; import android.graphics.Color; import android.graphics.Point; import android.graphics.PointF; import android.graphics.Rect; import android.os.Bundle; import android.view.LayoutInflater; import android.view.Surface; import android.view.SurfaceControlViewHost; import android.view.SurfaceHolder; import android.view.SurfaceView; import android.view.View; import android.view.ViewGroup; import android.view.ViewGroup.LayoutParams; import android.widget.ImageView; import androidx.annotation.NonNull; import androidx.annotation.Nullable; import androidx.cardview.widget.CardView; import androidx.constraintlayout.widget.ConstraintLayout; import androidx.constraintlayout.widget.ConstraintSet; import androidx.core.content.ContextCompat; import androidx.fragment.app.FragmentActivity; import com.android.wallpaper.R; import com.android.wallpaper.asset.Asset; import com.android.wallpaper.asset.CurrentWallpaperAssetVN; import com.android.wallpaper.model.WallpaperInfo; import com.android.wallpaper.module.WallpaperPersister.Destination; import com.android.wallpaper.module.WallpaperPersister.SetWallpaperCallback; import com.android.wallpaper.util.ScreenSizeCalculator; import com.android.wallpaper.util.SizeCalculator; import com.android.wallpaper.util.WallpaperCropUtils; import com.android.wallpaper.widget.BottomActionBar; import com.android.wallpaper.widget.BottomActionBar.AccessibilityCallback; import com.android.wallpaper.widget.LockScreenPreviewer; import com.android.wallpaper.widget.WallpaperColorsLoader; import com.android.wallpaper.widget.WallpaperInfoView; import com.bumptech.glide.Glide; import com.bumptech.glide.MemoryCategory; import com.davemorrissey.labs.subscaleview.ImageSource; import com.davemorrissey.labs.subscaleview.SubsamplingScaleImageView; import com.google.android.material.tabs.TabLayout; import java.util.Locale; /** * Fragment which displays the UI for previewing an individual static wallpaper and its attribution * information. */ public class ImagePreviewFragment extends PreviewFragment { private static final float DEFAULT_WALLPAPER_MAX_ZOOM = 8f; private final WallpaperSurfaceCallback mWallpaperSurfaceCallback = new WallpaperSurfaceCallback(); private SubsamplingScaleImageView mFullResImageView; private Asset mWallpaperAsset; private Point mScreenSize; private Point mRawWallpaperSize; // Native size of wallpaper image. private ImageView mLowResImageView; private TouchForwardingLayout mTouchForwardingLayout; private ConstraintLayout mContainer; private SurfaceView mWorkspaceSurface; private WorkspaceSurfaceHolderCallback mWorkspaceSurfaceCallback; private SurfaceView mWallpaperSurface; private ViewGroup mLockPreviewContainer; private LockScreenPreviewer mLockScreenPreviewer; private WallpaperInfoView mWallpaperInfoView; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); mWallpaperAsset = mWallpaper.getAsset(requireContext().getApplicationContext()); } @Override protected int getLayoutResId() { return R.layout.fragment_image_preview_v2; } @Override protected int getLoadingIndicatorResId() { return R.id.loading_indicator; } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = super.onCreateView(inflater, container, savedInstanceState); Activity activity = requireActivity(); mScreenSize = ScreenSizeCalculator.getInstance().getScreenSize( activity.getWindowManager().getDefaultDisplay()); // TODO: Consider moving some part of this to the base class when live preview is ready. view.findViewById(R.id.low_res_image).setVisibility(View.GONE); view.findViewById(R.id.full_res_image).setVisibility(View.GONE); mLoadingProgressBar.hide(); mContainer = view.findViewById(R.id.container); mTouchForwardingLayout = mContainer.findViewById(R.id.touch_forwarding_layout); // Set aspect ratio on the preview card dynamically. ConstraintSet set = new ConstraintSet(); set.clone(mContainer); String ratio = String.format(Locale.US, "%d:%d", mScreenSize.x, mScreenSize.y); set.setDimensionRatio(mTouchForwardingLayout.getId(), ratio); set.applyTo(mContainer); mWorkspaceSurface = mContainer.findViewById(R.id.workspace_surface); mWorkspaceSurfaceCallback = new WorkspaceSurfaceHolderCallback(mWorkspaceSurface, getContext()); mWallpaperSurface = mContainer.findViewById(R.id.wallpaper_surface); mLockPreviewContainer = mContainer.findViewById(R.id.lock_screen_preview_container); mLockScreenPreviewer = new LockScreenPreviewer(getLifecycle(), getActivity(), mLockPreviewContainer); TabLayout tabs = inflater.inflate(R.layout.full_preview_tabs, view.findViewById(R.id.toolbar_tabs_container)) .findViewById(R.id.full_preview_tabs); tabs.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() { @Override public void onTabSelected(TabLayout.Tab tab) { updateScreenPreview(tab.getPosition() == 0); } @Override public void onTabUnselected(TabLayout.Tab tab) {} @Override public void onTabReselected(TabLayout.Tab tab) {} }); // The TabLayout only contains below tabs, see: full_preview_tabs.xml // 0. Home tab // 1. Lock tab tabs.getTabAt(mViewAsHome ? 0 : 1).select(); updateScreenPreview(mViewAsHome); view.measure(makeMeasureSpec(mScreenSize.x, EXACTLY), makeMeasureSpec(mScreenSize.y, EXACTLY)); ((CardView) mWorkspaceSurface.getParent()) .setRadius(SizeCalculator.getPreviewCornerRadius( activity, mContainer.getMeasuredWidth())); renderImageWallpaper(); renderWorkspaceSurface(); // Trim some memory from Glide to make room for the full-size image in this fragment. Glide.get(activity).setMemoryCategory(MemoryCategory.LOW); setUpLoadingIndicator(); return view; } @Override public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) { super.onViewCreated(view, savedInstanceState); WallpaperColorsLoader.getWallpaperColors(getContext(), mWallpaper.getThumbAsset(getContext()), mLockScreenPreviewer::setColor); } @Override protected boolean isLoaded() { return mFullResImageView != null && mFullResImageView.hasImage(); } @Override public void onClickOk() { FragmentActivity activity = getActivity(); if (activity != null) { activity.finish(); } } @Override public void onDestroy() { super.onDestroy(); if (mLoadingProgressBar != null) { mLoadingProgressBar.hide(); } mFullResImageView.recycle(); mWallpaperSurfaceCallback.cleanUp(); mWorkspaceSurfaceCallback.cleanUp(); } @Override protected void onBottomActionBarReady(BottomActionBar bottomActionBar) { super.onBottomActionBarReady(bottomActionBar); mWallpaperInfoView = (WallpaperInfoView) LayoutInflater.from(getContext()).inflate( R.layout.wallpaper_info_view, /* root= */null); mBottomActionBar.attachViewToBottomSheetAndBindAction(mWallpaperInfoView, INFORMATION); mBottomActionBar.showActionsOnly(INFORMATION, EDIT, APPLY); mBottomActionBar.setActionClickListener(EDIT, v -> setEditingEnabled(mBottomActionBar.isActionSelected(EDIT)) ); mBottomActionBar.setActionSelectedListener(EDIT, this::setEditingEnabled); mBottomActionBar.setActionClickListener(APPLY, this::onSetWallpaperClicked); // Update target view's accessibility param since it will be blocked by the bottom sheet // when expanded. mBottomActionBar.setAccessibilityCallback(new AccessibilityCallback() { @Override public void onBottomSheetCollapsed() { mContainer.setImportantForAccessibility(View.IMPORTANT_FOR_ACCESSIBILITY_YES); } @Override public void onBottomSheetExpanded() { mContainer.setImportantForAccessibility( View.IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS); } }); // Will trigger onActionSelected callback to update the editing state. mBottomActionBar.setDefaultSelectedButton(EDIT); mBottomActionBar.show(); mBottomActionBar.disableActions(); mWallpaperAsset.decodeRawDimensions(getActivity(), dimensions -> { // Don't continue loading the wallpaper if the Fragment is detached. if (getActivity() == null) { return; } // Return early and show a dialog if dimensions are null (signaling a decoding error). if (dimensions == null) { showLoadWallpaperErrorDialog(); return; } if (mBottomActionBar != null) { mBottomActionBar.enableActions(); } mRawWallpaperSize = dimensions; setUpExploreIntentAndLabel(ImagePreviewFragment.this::initFullResView); }); } /** * Initializes MosaicView by initializing tiling, setting a fallback page bitmap, and * initializing a zoom-scroll observer and click listener. */ private void initFullResView() { // Minimum scale will only be respected under this scale type. mFullResImageView.setMinimumScaleType(SubsamplingScaleImageView.SCALE_TYPE_CUSTOM); // When we set a minimum scale bigger than the scale with which the full image is shown, // disallow user to pan outside the view we show the wallpaper in. mFullResImageView.setPanLimit(SubsamplingScaleImageView.PAN_LIMIT_INSIDE); // Set a solid black "page bitmap" so MosaicView draws a black background while waiting // for the image to load or a transparent one if a thumbnail already loaded. Bitmap backgroundBitmap = Bitmap.createBitmap(1, 1, Bitmap.Config.ARGB_8888); int preColor = ContextCompat.getColor(getContext(), R.color.fullscreen_preview_background); int color = (mLowResImageView.getDrawable() == null) ? preColor : Color.TRANSPARENT; backgroundBitmap.setPixel(0, 0, color); mFullResImageView.setImage(ImageSource.bitmap(backgroundBitmap)); // Then set a fallback "page bitmap" to cover the whole MosaicView, which is an actual // (lower res) version of the image to be displayed. Point targetPageBitmapSize = new Point(mRawWallpaperSize); mWallpaperAsset.decodeBitmap(targetPageBitmapSize.x, targetPageBitmapSize.y, pageBitmap -> { // Check that the activity is still around since the decoding task started. if (getActivity() == null) { return; } // Some of these may be null depending on if the Fragment is paused, stopped, // or destroyed. if (mLoadingProgressBar != null) { mLoadingProgressBar.hide(); } // The page bitmap may be null if there was a decoding error, so show an // error dialog. if (pageBitmap == null) { showLoadWallpaperErrorDialog(); return; } if (mFullResImageView != null) { // Set page bitmap. mFullResImageView.setImage(ImageSource.bitmap(pageBitmap)); setDefaultWallpaperZoomAndScroll( mWallpaperAsset instanceof CurrentWallpaperAssetVN); crossFadeInMosaicView(); } getActivity().invalidateOptionsMenu(); if (mWallpaperInfoView != null && mWallpaper != null) { mWallpaperInfoView.populateWallpaperInfo(mWallpaper, mActionLabel, mExploreIntent, this::onExploreClicked); } }); } /** * Makes the MosaicView visible with an alpha fade-in animation while fading out the loading * indicator. */ private void crossFadeInMosaicView() { long shortAnimationDuration = getResources().getInteger( android.R.integer.config_shortAnimTime); mFullResImageView.setAlpha(0f); mFullResImageView.animate() .alpha(1f) .setDuration(shortAnimationDuration) .setListener(new AnimatorListenerAdapter() { @Override public void onAnimationEnd(Animator animation) { // Clear the thumbnail bitmap reference to save memory since it's no longer // visible. if (mLowResImageView != null) { mLowResImageView.setImageBitmap(null); } } }); mLoadingProgressBar.animate() .alpha(0f) .setDuration(shortAnimationDuration) .setListener(new AnimatorListenerAdapter() { @Override public void onAnimationEnd(Animator animation) { if (mLoadingProgressBar != null) { mLoadingProgressBar.hide(); } } }); } /** * Sets the default wallpaper zoom and scroll position based on a "crop surface" (with extra * width to account for parallax) superimposed on the screen. Shows as much of the wallpaper as * possible on the crop surface and align screen to crop surface such that the default preview * matches what would be seen by the user in the left-most home screen. * *

This method is called once in the Fragment lifecycle after the wallpaper asset has loaded * and rendered to the layout. * * @param offsetToFarLeft {@code true} if we want to offset the visible rectangle to far left of * the raw wallpaper; {@code false} otherwise. */ private void setDefaultWallpaperZoomAndScroll(boolean offsetToFarLeft) { // Determine minimum zoom to fit maximum visible area of wallpaper on crop surface. int cropWidth = mWallpaperSurface.getMeasuredWidth(); int cropHeight = mWallpaperSurface.getMeasuredHeight(); Point crop = new Point(cropWidth, cropHeight); Rect visibleRawWallpaperRect = WallpaperCropUtils.calculateVisibleRect(mRawWallpaperSize, crop); if (offsetToFarLeft) { visibleRawWallpaperRect.offsetTo(/* newLeft= */ 0, visibleRawWallpaperRect.top); } final PointF centerPosition = new PointF(visibleRawWallpaperRect.centerX(), visibleRawWallpaperRect.centerY()); Point visibleRawWallpaperSize = new Point(visibleRawWallpaperRect.width(), visibleRawWallpaperRect.height()); final float defaultWallpaperZoom = WallpaperCropUtils.calculateMinZoom( visibleRawWallpaperSize, crop); final float minWallpaperZoom = defaultWallpaperZoom; // Set min wallpaper zoom and max zoom on MosaicView widget. mFullResImageView.setMaxScale(Math.max(DEFAULT_WALLPAPER_MAX_ZOOM, defaultWallpaperZoom)); mFullResImageView.setMinScale(minWallpaperZoom); // Set center to composite positioning between scaled wallpaper and screen. mFullResImageView.setScaleAndCenter(minWallpaperZoom, centerPosition); } private Rect calculateCropRect() { float wallpaperZoom = mFullResImageView.getScale(); Context context = requireContext().getApplicationContext(); Rect visibleFileRect = new Rect(); mFullResImageView.visibleFileRect(visibleFileRect); int cropWidth = mWallpaperSurface.getMeasuredWidth(); int cropHeight = mWallpaperSurface.getMeasuredHeight(); int maxCrop = Math.max(cropWidth, cropHeight); int minCrop = Math.min(cropWidth, cropHeight); Point hostViewSize = new Point(cropWidth, cropHeight); Resources res = context.getResources(); Point cropSurfaceSize = WallpaperCropUtils.calculateCropSurfaceSize(res, maxCrop, minCrop); Rect cropRect = WallpaperCropUtils.calculateCropRect(context, hostViewSize, cropSurfaceSize, mRawWallpaperSize, visibleFileRect, wallpaperZoom); return cropRect; } @Override protected void setCurrentWallpaper(@Destination int destination) { mWallpaperSetter.setCurrentWallpaper(getActivity(), mWallpaper, mWallpaperAsset, destination, mFullResImageView.getScale(), calculateCropRect(), new SetWallpaperCallback() { @Override public void onSuccess(WallpaperInfo wallpaperInfo) { finishActivity(/* success= */ true); } @Override public void onError(@Nullable Throwable throwable) { showSetWallpaperErrorDialog(destination); } }); } private void renderWorkspaceSurface() { mWorkspaceSurface.setZOrderMediaOverlay(true); mWorkspaceSurface.getHolder().addCallback(mWorkspaceSurfaceCallback); } private void renderImageWallpaper() { mWallpaperSurface.getHolder().addCallback(mWallpaperSurfaceCallback); } private class WallpaperSurfaceCallback implements SurfaceHolder.Callback { private Surface mLastSurface; private SurfaceControlViewHost mHost; @Override public void surfaceCreated(SurfaceHolder holder) { if (mLastSurface != holder.getSurface()) { mLastSurface = holder.getSurface(); if (mFullResImageView != null) { mFullResImageView.recycle(); } Context context = getContext(); View wallpaperPreviewContainer = LayoutInflater.from(context).inflate( R.layout.fullscreen_wallpaper_preview, null); mFullResImageView = wallpaperPreviewContainer.findViewById(R.id.full_res_image); mLowResImageView = wallpaperPreviewContainer.findViewById(R.id.low_res_image); // Scale the mWallpaperSurface based on system zoom's scale so that the wallpaper is // rendered in a larger surface than what preview shows, simulating the behavior of // the actual wallpaper surface. float scale = WallpaperCropUtils.getSystemWallpaperMaximumScale(context); int origWidth = mWallpaperSurface.getWidth(); int width = (int) (origWidth * scale); int origHeight = mWallpaperSurface.getHeight(); int height = (int) (origHeight * scale); int left = (origWidth - width) / 2; int top = (origHeight - height) / 2; if (WallpaperCropUtils.isRtl(context)) { left *= -1; } LayoutParams params = mWallpaperSurface.getLayoutParams(); params.width = width; params.height = height; mWallpaperSurface.setX(left); mWallpaperSurface.setY(top); mWallpaperSurface.setLayoutParams(params); mWallpaperSurface.requestLayout(); // Load a low-res placeholder image if there's a thumbnail available from the asset // that can be shown to the user more quickly than the full-sized image. if (mWallpaperAsset.hasLowResDataSource()) { Activity activity = requireActivity(); mWallpaperAsset.loadLowResDrawable(activity, mLowResImageView, Color.BLACK, new WallpaperPreviewBitmapTransformation( activity.getApplicationContext(), isRtl())); } wallpaperPreviewContainer.measure( makeMeasureSpec(width, EXACTLY), makeMeasureSpec(height, EXACTLY)); wallpaperPreviewContainer.layout(0, 0, width, height); mTouchForwardingLayout.setTargetView(mFullResImageView); cleanUp(); mHost = new SurfaceControlViewHost(context, context.getDisplay(), mWallpaperSurface.getHostToken()); mHost.setView(wallpaperPreviewContainer, wallpaperPreviewContainer.getWidth(), wallpaperPreviewContainer.getHeight()); mWallpaperSurface.setChildSurfacePackage(mHost.getSurfacePackage()); } } @Override public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { } @Override public void surfaceDestroyed(SurfaceHolder holder) { } public void cleanUp() { if (mHost != null) { mHost.release(); mHost = null; } } }; private void setEditingEnabled(boolean enabled) { mTouchForwardingLayout.setForwardingEnabled(enabled); } private void updateScreenPreview(boolean isHomeSelected) { mWorkspaceSurface.setVisibility(isHomeSelected ? View.VISIBLE : View.INVISIBLE); mLockPreviewContainer.setVisibility(isHomeSelected ? View.INVISIBLE : View.VISIBLE); } }