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Merge "Unifying scroll calculation logic for both widgets and apps recycler view Also using itemType instead of item object for widget size cache" into tm-qpr-dev am: 5069964ea2

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Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/18763224

Change-Id: Ief18fa0a43fd0c01685109ef26f37d32af1c200b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
This commit is contained in:
TreeHugger Robot
2022-06-22 03:35:36 +00:00
committed by Automerger Merge Worker
parent ea4cd21275 5069964ea2
commit 67d79af886
5 changed files with 117 additions and 162 deletions
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1
res/values/id.xml
View File

@@ -16,7 +16,6 @@
-->
<resources>
<item type="id" name="apps_list_view_work" />
<item type="id" name="tag_widget_entry" />
<item type="id" name="view_type_widgets_space" />
<item type="id" name="view_type_widgets_list" />
<item type="id" name="view_type_widgets_header" />

59
src/com/android/launcher3/FastScrollRecyclerView.java
View File

@@ -24,6 +24,7 @@ import android.view.ViewGroup;
import android.view.accessibility.AccessibilityNodeInfo;
import androidx.annotation.Nullable;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import com.android.launcher3.compat.AccessibilityManagerCompat;
@@ -86,15 +87,20 @@ public abstract class FastScrollRecyclerView extends RecyclerView {
* Returns the available scroll height:
* AvailableScrollHeight = Total height of the all items - last page height
*/
protected abstract int getAvailableScrollHeight();
protected int getAvailableScrollHeight() {
// AvailableScrollHeight = Total height of the all items - first page height
int firstPageHeight = getMeasuredHeight() - getPaddingTop() - getPaddingBottom();
int totalHeightOfAllItems = getItemsHeight(/* untilIndex= */ getAdapter().getItemCount());
int availableScrollHeight = totalHeightOfAllItems - firstPageHeight;
return Math.max(0, availableScrollHeight);
}
/**
* Returns the available scroll bar height:
* AvailableScrollBarHeight = Total height of the visible view - thumb height
*/
protected int getAvailableScrollBarHeight() {
int availableScrollBarHeight = getScrollbarTrackHeight() - mScrollbar.getThumbHeight();
return availableScrollBarHeight;
return getScrollbarTrackHeight() - mScrollbar.getThumbHeight();
}
/**
@@ -152,12 +158,51 @@ public abstract class FastScrollRecyclerView extends RecyclerView {
}
/**
* Maps the touch (from 0..1) to the adapter position that should be visible.
* <p>Override in each subclass of this base class.
*
* @return the scroll top of this recycler view.
*/
public abstract int getCurrentScrollY();
public int getCurrentScrollY() {
Adapter adapter = getAdapter();
if (adapter == null) {
return -1;
}
if (adapter.getItemCount() == 0 || getChildCount() == 0) {
return -1;
}
int itemPosition = NO_POSITION;
View child = null;
LayoutManager layoutManager = getLayoutManager();
if (layoutManager instanceof LinearLayoutManager) {
// Use the LayoutManager as the source of truth for visible positions. During
// animations, the view group child may not correspond to the visible views that appear
// at the top.
itemPosition = ((LinearLayoutManager) layoutManager).findFirstVisibleItemPosition();
child = layoutManager.findViewByPosition(itemPosition);
}
if (child == null) {
// If the layout manager returns null for any reason, which can happen before layout
// has occurred for the position, then look at the child of this view as a ViewGroup.
child = getChildAt(0);
itemPosition = getChildAdapterPosition(child);
}
if (itemPosition == NO_POSITION) {
return -1;
}
return getPaddingTop() + getItemsHeight(itemPosition)
- layoutManager.getDecoratedTop(child);
}
/**
* Returns the sum of the height, in pixels, of this list adapter's items from index
* 0 (inclusive) until {@code untilIndex} (exclusive). If untilIndex is same as the itemCount,
* it returns the full height of all the items.
*
* <p>If the untilIndex is larger than the total number of items in this adapter, returns the
* sum of all items' height.
*/
protected abstract int getItemsHeight(int untilIndex);
/**
* Maps the touch (from 0..1) to the adapter position that should be visible.

32
src/com/android/launcher3/allapps/AllAppsRecyclerView.java
View File

@@ -31,7 +31,6 @@ import android.util.AttributeSet;
import android.util.Log;
import android.util.SparseIntArray;
import android.view.MotionEvent;
import android.view.View;
import androidx.recyclerview.widget.RecyclerView;
@@ -342,24 +341,7 @@ public class AllAppsRecyclerView extends FastScrollRecyclerView {
}
@Override
public int getCurrentScrollY() {
// Return early if there are no items or we haven't been measured
List<AllAppsGridAdapter.AdapterItem> items = mApps.getAdapterItems();
if (items.isEmpty() || mNumAppsPerRow == 0 || getChildCount() == 0) {
return -1;
}
// Calculate the y and offset for the item
View child = getChildAt(0);
int position = getChildAdapterPosition(child);
if (position == NO_POSITION) {
return -1;
}
return getPaddingTop() +
getCurrentScrollY(position, getLayoutManager().getDecoratedTop(child));
}
public int getCurrentScrollY(int position, int offset) {
protected int getItemsHeight(int position) {
List<AllAppsGridAdapter.AdapterItem> items = mApps.getAdapterItems();
AllAppsGridAdapter.AdapterItem posItem = position < items.size()
? items.get(position) : null;
@@ -400,17 +382,7 @@ public class AllAppsRecyclerView extends FastScrollRecyclerView {
}
mCachedScrollPositions.put(position, y);
}
return y - offset;
}
/**
* Returns the available scroll height:
* AvailableScrollHeight = Total height of the all items - last page height
*/
@Override
protected int getAvailableScrollHeight() {
return getPaddingTop() + getCurrentScrollY(getAdapter().getItemCount(), 0)
- getHeight() + getPaddingBottom();
return y;
}
public int getScrollBarTop() {

29
src/com/android/launcher3/widget/picker/WidgetsListAdapter.java
View File

@@ -21,7 +21,6 @@ import static com.android.launcher3.recyclerview.ViewHolderBinder.POSITION_FIRST
import static com.android.launcher3.recyclerview.ViewHolderBinder.POSITION_LAST;
import android.content.Context;
import android.graphics.Rect;
import android.os.Process;
import android.util.Log;
import android.util.SparseArray;
@@ -36,7 +35,6 @@ import androidx.annotation.Nullable;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import androidx.recyclerview.widget.RecyclerView.Adapter;
import androidx.recyclerview.widget.RecyclerView.LayoutParams;
import androidx.recyclerview.widget.RecyclerView.ViewHolder;
import com.android.launcher3.R;
@@ -80,10 +78,10 @@ public class WidgetsListAdapter extends Adapter<ViewHolder> implements OnHeaderC
private static final boolean DEBUG = false;
/** Uniquely identifies widgets list view type within the app. */
private static final int VIEW_TYPE_WIDGETS_SPACE = R.id.view_type_widgets_space;
private static final int VIEW_TYPE_WIDGETS_LIST = R.id.view_type_widgets_list;
private static final int VIEW_TYPE_WIDGETS_HEADER = R.id.view_type_widgets_header;
private static final int VIEW_TYPE_WIDGETS_SEARCH_HEADER = R.id.view_type_widgets_search_header;
public static final int VIEW_TYPE_WIDGETS_SPACE = R.id.view_type_widgets_space;
public static final int VIEW_TYPE_WIDGETS_LIST = R.id.view_type_widgets_list;
public static final int VIEW_TYPE_WIDGETS_HEADER = R.id.view_type_widgets_header;
public static final int VIEW_TYPE_WIDGETS_SEARCH_HEADER = R.id.view_type_widgets_search_header;
private final Context mContext;
private final WidgetsDiffReporter mDiffReporter;
@@ -103,7 +101,6 @@ public class WidgetsListAdapter extends Adapter<ViewHolder> implements OnHeaderC
@Nullable private Predicate<WidgetsListBaseEntry> mFilter = null;
@Nullable private RecyclerView mRecyclerView;
@Nullable private PackageUserKey mPendingClickHeader;
private final int mSpacingBetweenEntries;
private int mMaxSpanSize = 4;
public WidgetsListAdapter(Context context, LayoutInflater layoutInflater,
@@ -133,28 +130,11 @@ public class WidgetsListAdapter extends Adapter<ViewHolder> implements OnHeaderC
mViewHolderBinders.put(
VIEW_TYPE_WIDGETS_SPACE,
new WidgetsSpaceViewHolderBinder(emptySpaceHeightProvider));
mSpacingBetweenEntries =
context.getResources().getDimensionPixelSize(R.dimen.widget_list_entry_spacing);
}
@Override
public void onAttachedToRecyclerView(@NonNull RecyclerView recyclerView) {
mRecyclerView = recyclerView;
mRecyclerView.addItemDecoration(new RecyclerView.ItemDecoration() {
@Override
public void getItemOffsets(
@NonNull Rect outRect,
@NonNull View view,
@NonNull RecyclerView parent,
@NonNull RecyclerView.State state) {
super.getItemOffsets(outRect, view, parent, state);
int position = ((LayoutParams) view.getLayoutParams()).getViewLayoutPosition();
boolean isHeader =
view.getTag(R.id.tag_widget_entry) instanceof WidgetsListBaseEntry.Header;
outRect.top += position > 0 && isHeader ? mSpacingBetweenEntries : 0;
}
});
}
@Override
@@ -286,7 +266,6 @@ public class WidgetsListAdapter extends Adapter<ViewHolder> implements OnHeaderC
listPos |= POSITION_LAST;
}
viewHolderBinder.bindViewHolder(holder, mVisibleEntries.get(pos), listPos, payloads);
holder.itemView.setTag(R.id.tag_widget_entry, entry);
}
@Override

158
src/com/android/launcher3/widget/picker/WidgetsRecyclerView.java
View File

@@ -16,27 +16,24 @@
package com.android.launcher3.widget.picker;
import static com.android.launcher3.widget.picker.WidgetsListAdapter.VIEW_TYPE_WIDGETS_HEADER;
import static com.android.launcher3.widget.picker.WidgetsListAdapter.VIEW_TYPE_WIDGETS_SEARCH_HEADER;
import android.content.Context;
import android.graphics.Point;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.util.SparseIntArray;
import android.view.MotionEvent;
import android.view.View;
import android.widget.TableLayout;
import androidx.annotation.NonNull;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import androidx.recyclerview.widget.RecyclerView.OnItemTouchListener;
import com.android.launcher3.DeviceProfile;
import com.android.launcher3.FastScrollRecyclerView;
import com.android.launcher3.R;
import com.android.launcher3.views.ActivityContext;
import com.android.launcher3.widget.model.WidgetListSpaceEntry;
import com.android.launcher3.widget.model.WidgetsListBaseEntry;
import com.android.launcher3.widget.model.WidgetsListContentEntry;
import com.android.launcher3.widget.model.WidgetsListHeaderEntry;
import com.android.launcher3.widget.model.WidgetsListSearchHeaderEntry;
import com.android.launcher3.widget.picker.WidgetsSpaceViewHolderBinder.EmptySpaceView;
/**
* The widgets recycler view.
@@ -51,12 +48,14 @@ public class WidgetsRecyclerView extends FastScrollRecyclerView implements OnIte
private boolean mTouchDownOnScroller;
private HeaderViewDimensionsProvider mHeaderViewDimensionsProvider;
// Cached sizes
private int mLastVisibleWidgetContentTableHeight = 0;
private int mWidgetHeaderHeight = 0;
private int mWidgetEmptySpaceHeight = 0;
private final int mSpacingBetweenEntries;
/**
* There is always 1 or 0 item of VIEW_TYPE_WIDGETS_LIST. Other types have fixes sizes, so the
* the size can be used for all other items of same type. Caching the last know size for
* VIEW_TYPE_WIDGETS_LIST allows us to use it to estimate full size even when
* VIEW_TYPE_WIDGETS_LIST is not visible on the screen.
*/
private final SparseIntArray mCachedSizes = new SparseIntArray();
private final SpacingDecoration mSpacingDecoration;
public WidgetsRecyclerView(Context context) {
this(context, null);
@@ -72,12 +71,8 @@ public class WidgetsRecyclerView extends FastScrollRecyclerView implements OnIte
mScrollbarTop = getResources().getDimensionPixelSize(R.dimen.dynamic_grid_edge_margin);
addOnItemTouchListener(this);
ActivityContext activity = ActivityContext.lookupContext(getContext());
DeviceProfile grid = activity.getDeviceProfile();
// The spacing used between entries.
mSpacingBetweenEntries =
getResources().getDimensionPixelSize(R.dimen.widget_list_entry_spacing);
mSpacingDecoration = new SpacingDecoration(context);
addItemDecoration(mSpacingDecoration);
}
@Override
@@ -138,67 +133,6 @@ public class WidgetsRecyclerView extends FastScrollRecyclerView implements OnIte
synchronizeScrollBarThumbOffsetToViewScroll(scrollY, getAvailableScrollHeight());
}
@Override
public int getCurrentScrollY() {
// Skip early if widgets are not bound.
if (isModelNotReady() || getChildCount() == 0) {
return -1;
}
int rowIndex = -1;
View child = null;
LayoutManager layoutManager = getLayoutManager();
if (layoutManager instanceof LinearLayoutManager) {
// Use the LayoutManager as the source of truth for visible positions. During
// animations, the view group child may not correspond to the visible views that appear
// at the top.
rowIndex = ((LinearLayoutManager) layoutManager).findFirstVisibleItemPosition();
child = layoutManager.findViewByPosition(rowIndex);
}
if (child == null) {
// If the layout manager returns null for any reason, which can happen before layout
// has occurred for the position, then look at the child of this view as a ViewGroup.
child = getChildAt(0);
rowIndex = getChildPosition(child);
}
for (int i = 0; i < getChildCount(); i++) {
View view = getChildAt(i);
if (view instanceof TableLayout) {
// This assumes there is ever only one content shown in this recycler view.
mLastVisibleWidgetContentTableHeight = view.getMeasuredHeight();
} else if (view instanceof WidgetsListHeader
&& mWidgetHeaderHeight == 0
&& view.getMeasuredHeight() > 0) {
// This assumes all header views are of the same height.
mWidgetHeaderHeight = view.getMeasuredHeight();
} else if (view instanceof EmptySpaceView && view.getMeasuredHeight() > 0) {
mWidgetEmptySpaceHeight = view.getMeasuredHeight();
}
}
int scrollPosition = getItemsHeight(rowIndex);
int offset = getLayoutManager().getDecoratedTop(child);
return getPaddingTop() + scrollPosition - offset;
}
/**
* Returns the available scroll height, in pixel.
*
* <p>If the recycler view can't be scrolled, returns 0.
*/
@Override
protected int getAvailableScrollHeight() {
// AvailableScrollHeight = Total height of the all items - first page height
int firstPageHeight = getMeasuredHeight() - getPaddingTop() - getPaddingBottom();
int totalHeightOfAllItems = getItemsHeight(/* untilIndex= */ mAdapter.getItemCount());
int availableScrollHeight = totalHeightOfAllItems - firstPageHeight;
return Math.max(0, availableScrollHeight);
}
private boolean isModelNotReady() {
return mAdapter.getItemCount() == 0;
}
@@ -246,28 +180,27 @@ public class WidgetsRecyclerView extends FastScrollRecyclerView implements OnIte
* <p>If the untilIndex is larger than the total number of items in this adapter, returns the
* sum of all items' height.
*/
private int getItemsHeight(int untilIndex) {
@Override
protected int getItemsHeight(int untilIndex) {
// Initialize cache
int childCount = getChildCount();
int startPosition;
if (childCount > 0
&& ((startPosition = getChildAdapterPosition(getChildAt(0))) != NO_POSITION)) {
for (int i = 0; i < childCount; i++) {
mCachedSizes.put(
mAdapter.getItemViewType(startPosition + i),
getChildAt(i).getMeasuredHeight());
}
}
if (untilIndex > mAdapter.getItems().size()) {
untilIndex = mAdapter.getItems().size();
}
int totalItemsHeight = 0;
for (int i = 0; i < untilIndex; i++) {
WidgetsListBaseEntry entry = mAdapter.getItems().get(i);
if (entry instanceof WidgetsListHeaderEntry
|| entry instanceof WidgetsListSearchHeaderEntry) {
totalItemsHeight += mWidgetHeaderHeight;
if (i > 0) {
// Each header contains the spacing between entries as top decoration, except
// the first one.
totalItemsHeight += mSpacingBetweenEntries;
}
} else if (entry instanceof WidgetsListContentEntry) {
totalItemsHeight += mLastVisibleWidgetContentTableHeight;
} else if (entry instanceof WidgetListSpaceEntry) {
totalItemsHeight += mWidgetEmptySpaceHeight;
} else {
throw new UnsupportedOperationException("Can't estimate height for " + entry);
}
int type = mAdapter.getItemViewType(i);
totalItemsHeight += mCachedSizes.get(type) + mSpacingDecoration.getSpacing(i, type);
}
return totalItemsHeight;
}
@@ -283,4 +216,31 @@ public class WidgetsRecyclerView extends FastScrollRecyclerView implements OnIte
*/
int getHeaderViewHeight();
}
private static class SpacingDecoration extends RecyclerView.ItemDecoration {
private final int mSpacingBetweenEntries;
SpacingDecoration(@NonNull Context context) {
mSpacingBetweenEntries =
context.getResources().getDimensionPixelSize(R.dimen.widget_list_entry_spacing);
}
@Override
public void getItemOffsets(
@NonNull Rect outRect,
@NonNull View view,
@NonNull RecyclerView parent,
@NonNull RecyclerView.State state) {
super.getItemOffsets(outRect, view, parent, state);
int position = parent.getChildAdapterPosition(view);
outRect.top += getSpacing(position, parent.getAdapter().getItemViewType(position));
}
public int getSpacing(int position, int type) {
boolean isHeader = type == VIEW_TYPE_WIDGETS_SEARCH_HEADER
|| type == VIEW_TYPE_WIDGETS_HEADER;
return position > 0 && isHeader ? mSpacingBetweenEntries : 0;
}
}
}