Show breadcrumb on error state screens am: 7c94bc0f8e (e5940299) · Commits · e / os / android_packages_apps_DocumentsUI

src/com/android/documentsui/HorizontalBreadcrumb.java

+36 −10

Original line number	Diff line number	Diff line
		@@ -30,7 +30,6 @@ import androidx.recyclerview.widget.RecyclerView;

		import com.android.documentsui.NavigationViewManager.Breadcrumb;
		import com.android.documentsui.NavigationViewManager.Environment;
		import com.android.documentsui.base.DocumentInfo;
		import com.android.documentsui.dirlist.AccessibilityEventRouter;

		import java.util.function.Consumer;
		@@ -65,7 +64,7 @@ public final class HorizontalBreadcrumb extends RecyclerView implements Breadcru
		IntConsumer listener) {

		mClickListener = listener;
		mLayoutManager = new LinearLayoutManager(
		mLayoutManager = new HorizontalBreadcrumbLinearLayoutManager(
		getContext(), LinearLayoutManager.HORIZONTAL, false);
		mAdapter = new BreadcrumbAdapter(state, env, this::onKey);
		// Since we are using GestureDetector to detect click events, a11y services don't know which
		@@ -163,7 +162,7 @@ public final class HorizontalBreadcrumb extends RecyclerView implements Breadcru
		mState = state;
		mEnv = env;
		mClickListener = clickListener;
		mLastItemSize = mState.stack.size();
		mLastItemSize = getItemCount();
		}

		@Override
		@@ -175,14 +174,16 @@ public final class HorizontalBreadcrumb extends RecyclerView implements Breadcru

		@Override
		public void onBindViewHolder(BreadcrumbHolder holder, int position) {
		final DocumentInfo doc = getItem(position);
		final int padding = (int) holder.itemView.getResources()
		.getDimension(R.dimen.breadcrumb_item_padding);
		final int enableColor = holder.itemView.getContext().getColor(R.color.primary);
		final boolean isFirst = position == 0;
		// Note that when isFirst is true, there might not be a DocumentInfo on the stack as it
		// could be an error state screen accessible from the root info.
		final boolean isLast = position == getItemCount() - 1;

		holder.mTitle.setText(isFirst ? mEnv.getCurrentRoot().title : doc.displayName);
		holder.mTitle.setText(
		isFirst ? mEnv.getCurrentRoot().title : mState.stack.get(position).displayName);
		holder.mTitle.setTextColor(isLast ? enableColor : holder.mDefaultTextColor);
		holder.mTitle.setPadding(isFirst ? padding * 3 : padding,
		padding, isLast ? padding * 2 : padding, padding);
		@@ -192,12 +193,19 @@ public final class HorizontalBreadcrumb extends RecyclerView implements Breadcru
		holder.setLast(isLast);
		}

		private DocumentInfo getItem(int position) {
		return mState.stack.get(position);
		}

		@Override
		public int getItemCount() {
		// Don't show recents in the breadcrumb.
		if (mState.stack.isRecents()) {
		return 0;
		}
		// Continue showing the root title in the breadcrumb for cross-profile error screens.
		if (mState.supportsCrossProfile()
		&& mState.stack.size() == 0
		&& mState.stack.getRoot() != null
		&& mState.stack.getRoot().supportsCrossProfile()) {
		return 1;
		}
		return mState.stack.size();
		}

		@@ -206,7 +214,7 @@ public final class HorizontalBreadcrumb extends RecyclerView implements Breadcru
		}

		public void updateLastItemSize() {
		mLastItemSize = mState.stack.size();
		mLastItemSize = getItemCount();
		}
		}

		@@ -238,4 +246,22 @@ public final class HorizontalBreadcrumb extends RecyclerView implements Breadcru
		public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {
		}
		}

		private static class HorizontalBreadcrumbLinearLayoutManager extends LinearLayoutManager {

		/**
		* Disable predictive animations. There is a bug in RecyclerView which causes views that
		* are being reloaded to pull invalid view holders from the internal recycler stack if the
		* adapter size has decreased since the ViewHolder was recycled.
		*/
		@Override
		public boolean supportsPredictiveItemAnimations() {
		return false;
		}

		HorizontalBreadcrumbLinearLayoutManager(
		Context context, int orientation, boolean reverseLayout) {
		super(context, orientation, reverseLayout);
		}
		}
		}