Refactor DirectoryFragment. (c64cb252) · Commits · e / os / android_frameworks_base

packages/DocumentsUI/src/com/android/documentsui/DirectoryFragment.java

+185 −107

Original line number	Diff line number	Diff line
		@@ -61,6 +61,7 @@ import android.os.Parcelable;
		import android.os.SystemProperties;
		import android.provider.DocumentsContract;
		import android.provider.DocumentsContract.Document;
		import android.support.annotation.Nullable;
		import android.support.v7.widget.GridLayoutManager;
		import android.support.v7.widget.LinearLayoutManager;
		import android.support.v7.widget.RecyclerView;
		@@ -96,7 +97,6 @@ import com.android.documentsui.model.DocumentInfo;
		import com.android.documentsui.model.DocumentStack;
		import com.android.documentsui.model.RootInfo;
		import com.android.internal.util.Preconditions;

		import com.google.common.collect.Lists;

		import java.util.ArrayList;
		@@ -129,6 +129,8 @@ public class DirectoryFragment extends Fragment {
		private static final String EXTRA_QUERY = "query";
		private static final String EXTRA_IGNORE_STATE = "ignoreState";

		private final Model mModel = new Model();

		private final Handler mHandler = new Handler(Looper.getMainLooper());

		private View mEmptyView;
		@@ -147,7 +149,6 @@ public class DirectoryFragment extends Fragment {
		private LoaderCallbacks<DirectoryResult> mCallbacks;
		private FragmentTuner mFragmentTuner;
		private DocumentClipper mClipper;
		private MultiSelectManager mSelectionManager;
		// These are lazily initialized.
		private LinearLayoutManager mListLayout;
		private GridLayoutManager mGridLayout;
		@@ -261,7 +262,7 @@ public class DirectoryFragment extends Fragment {
		}

		// Clear any outstanding selection
		mSelectionManager.clearSelection();
		mModel.clearSelection();
		}

		@Override
		@@ -290,14 +291,17 @@ public class DirectoryFragment extends Fragment {
		}
		};

		mSelectionManager = new MultiSelectManager(
		// TODO: instead of inserting the view into the constructor, extract listener-creation code
		// and set the listener on the view after the fact. Then the view doesn't need to be passed
		// into the selection manager which is passed into the model.
		MultiSelectManager selMgr= new MultiSelectManager(
		mRecView,
		listener,
		state.allowMultiple
		? MultiSelectManager.MODE_MULTIPLE
		: MultiSelectManager.MODE_SINGLE);

		mSelectionManager.addCallback(new SelectionModeListener());
		selMgr.addCallback(new SelectionModeListener());
		mModel.setSelectionManager(selMgr);

		mType = getArguments().getInt(EXTRA_TYPE);
		mStateKey = buildStateKey(root, doc);
		@@ -367,7 +371,9 @@ public class DirectoryFragment extends Fragment {

		if (!isAdded()) return;

		mAdapter.replaceResult(result);
		// TODO: make the adapter listen to the model
		mModel.update(result);
		mAdapter.update();

		// Push latest state up to UI
		// TODO: if mode change was racing with us, don't overwrite it
		@@ -380,7 +386,7 @@ public class DirectoryFragment extends Fragment {
		updateDisplayState();

		// When launched into empty recents, show drawer
		if (mType == TYPE_RECENT_OPEN && mAdapter.isEmpty() && !state.stackTouched &&
		if (mType == TYPE_RECENT_OPEN && mModel.isEmpty() && !state.stackTouched &&
		context instanceof DocumentsActivity) {
		((DocumentsActivity) context).setRootsDrawerOpen(true);
		}
		@@ -398,7 +404,9 @@ public class DirectoryFragment extends Fragment {

		@Override
		public void onLoaderReset(Loader<DirectoryResult> loader) {
		mAdapter.replaceResult(null);
		// TODO: make the adapter listen to the model.
		mModel.update(null);
		mAdapter.update();
		}
		};

		@@ -433,7 +441,7 @@ public class DirectoryFragment extends Fragment {
		}

		private boolean onSingleTapUp(MotionEvent e) {
		if (Events.isTouchEvent(e) && mSelectionManager.getSelection().isEmpty()) {
		if (Events.isTouchEvent(e) && mModel.getSelection().isEmpty()) {
		int position = getEventAdapterPosition(e);
		if (position != RecyclerView.NO_POSITION) {
		return handleViewItem(position);
		@@ -454,14 +462,14 @@ public class DirectoryFragment extends Fragment {
		}

		private boolean handleViewItem(int position) {
		final Cursor cursor = mAdapter.getItem(position);
		final Cursor cursor = mModel.getItem(position);
		checkNotNull(cursor, "Cursor cannot be null.");
		final String docMimeType = getCursorString(cursor, Document.COLUMN_MIME_TYPE);
		final int docFlags = getCursorInt(cursor, Document.COLUMN_FLAGS);
		if (isDocumentEnabled(docMimeType, docFlags)) {
		final DocumentInfo doc = DocumentInfo.fromDirectoryCursor(cursor);
		((BaseActivity) getActivity()).onDocumentPicked(doc, mAdapter);
		mSelectionManager.clearSelection();
		((BaseActivity) getActivity()).onDocumentPicked(doc, mModel);
		mModel.clearSelection();
		return true;
		}
		return false;
		@@ -598,7 +606,7 @@ public class DirectoryFragment extends Fragment {
		public boolean onBeforeItemStateChange(int position, boolean selected) {
		// Directories and footer items cannot be checked
		if (selected) {
		final Cursor cursor = mAdapter.getItem(position);
		final Cursor cursor = mModel.getItem(position);
		checkNotNull(cursor, "Cursor cannot be null.");
		final String docMimeType = getCursorString(cursor, Document.COLUMN_MIME_TYPE);
		final int docFlags = getCursorInt(cursor, Document.COLUMN_FLAGS);
		@@ -610,7 +618,7 @@ public class DirectoryFragment extends Fragment {
		@Override
		public void onItemStateChanged(int position, boolean selected) {

		final Cursor cursor = mAdapter.getItem(position);
		final Cursor cursor = mModel.getItem(position);
		checkNotNull(cursor, "Cursor cannot be null.");

		final int docFlags = getCursorInt(cursor, Document.COLUMN_FLAGS);
		@@ -621,7 +629,7 @@ public class DirectoryFragment extends Fragment {

		@Override
		public void onSelectionChanged() {
		mSelectionManager.getSelection(mSelected);
		mModel.getSelection(mSelected);
		if (mSelected.size() > 0) {
		if (DEBUG) Log.d(TAG, "Maybe starting action mode.");
		if (mActionMode == null) {
		@@ -651,7 +659,7 @@ public class DirectoryFragment extends Fragment {
		if (DEBUG) Log.d(TAG, "Handling action mode destroyed.");
		mActionMode = null;
		// clear selection
		mSelectionManager.clearSelection();
		mModel.clearSelection();
		mSelected.clear();
		mNoDeleteCount = 0;
		}
		@@ -659,8 +667,8 @@ public class DirectoryFragment extends Fragment {
		@Override
		public boolean onCreateActionMode(ActionMode mode, Menu menu) {
		mode.getMenuInflater().inflate(R.menu.mode_directory, menu);
		mode.setTitle(TextUtils.formatSelectedCount(mSelectionManager.getSelection().size()));
		return mSelectionManager.getSelection().size() > 0;
		mode.setTitle(TextUtils.formatSelectedCount(mModel.getSelection().size()));
		return mModel.getSelection().size() > 0;
		}

		@Override
		@@ -679,8 +687,7 @@ public class DirectoryFragment extends Fragment {
		@Override
		public boolean onActionItemClicked(ActionMode mode, MenuItem item) {

		Selection selection = new Selection();
		mSelectionManager.getSelection(selection);
		Selection selection = mModel.getSelection(new Selection());

		final int id = item.getItemId();
		if (id == R.id.menu_open) {
		@@ -948,50 +955,31 @@ public class DirectoryFragment extends Fragment {
		}
		}

		private final class DocumentsAdapter extends RecyclerView.Adapter<DocumentHolder>
		implements DocumentContext {
		private final class DocumentsAdapter extends RecyclerView.Adapter<DocumentHolder> {

		private final Context mContext;
		private final LayoutInflater mInflater;
		// TODO: Bring back support for footers.
		private final List<Footer> mFooters = new ArrayList<>();

		private Cursor mCursor;
		private int mCursorCount;

		public DocumentsAdapter(Context context) {
		mContext = context;
		mInflater = LayoutInflater.from(context);
		}

		public void replaceResult(DirectoryResult result) {
		if (DEBUG) Log.i(TAG, "Updating adapter with new result set.");
		mCursor = result != null ? result.cursor : null;
		mCursorCount = mCursor != null ? mCursor.getCount() : 0;

		public void update() {
		mFooters.clear();

		final Bundle extras = mCursor != null ? mCursor.getExtras() : null;
		if (extras != null) {
		final String info = extras.getString(DocumentsContract.EXTRA_INFO);
		if (info != null) {
		mFooters.add(new MessageFooter(2, R.drawable.ic_dialog_info, info));
		if (mModel.info != null) {
		mFooters.add(new MessageFooter(2, R.drawable.ic_dialog_info, mModel.info));
		}
		final String error = extras.getString(DocumentsContract.EXTRA_ERROR);
		if (error != null) {
		mFooters.add(new MessageFooter(3, R.drawable.ic_dialog_alert, error));
		if (mModel.error != null) {
		mFooters.add(new MessageFooter(3, R.drawable.ic_dialog_alert, mModel.error));
		}
		if (extras.getBoolean(DocumentsContract.EXTRA_LOADING, false)) {
		if (mModel.isLoading()) {
		mFooters.add(new LoadingFooter());
		}
		}

		if (result != null && result.exception != null) {
		mFooters.add(new MessageFooter(
		3, R.drawable.ic_dialog_alert, getString(R.string.query_error)));
		}

		if (isEmpty()) {
		if (mModel.isEmpty()) {
		mEmptyView.setVisibility(View.VISIBLE);
		} else {
		mEmptyView.setVisibility(View.GONE);
		@@ -1025,7 +1013,7 @@ public class DirectoryFragment extends Fragment {
		final ThumbnailCache thumbs = DocumentsApplication.getThumbnailsCache(
		context, mThumbSize);

		final Cursor cursor = getItem(position);
		final Cursor cursor = mModel.getItem(position);
		checkNotNull(cursor, "Cursor cannot be null.");

		final String docAuthority = getCursorString(cursor, RootCursorWrapper.COLUMN_AUTHORITY);
		@@ -1041,7 +1029,7 @@ public class DirectoryFragment extends Fragment {

		holder.docId = docId;
		final View itemView = holder.view;
		itemView.setActivated(mSelectionManager.getSelection().contains(position));
		itemView.setActivated(mModel.isSelected(position));

		final View line1 = itemView.findViewById(R.id.line1);
		final View line2 = itemView.findViewById(R.id.line2);
		@@ -1213,45 +1201,22 @@ public class DirectoryFragment extends Fragment {
		}
		}

		@Override
		public Cursor getCursor() {
		if (Looper.myLooper() != Looper.getMainLooper()) {
		throw new IllegalStateException("Can't call getCursor from non-main thread.");
		}
		return mCursor;
		}

		private Cursor getItem(int position) {
		if (position < mCursorCount) {
		mCursor.moveToPosition(position);
		return mCursor;
		}

		Log.w(TAG, "Returning null cursor for position: " + position);
		if (DEBUG) Log.d(TAG, "...Adapter size: " + mCursorCount);
		if (DEBUG) Log.d(TAG, "...Footer size: " + mFooters.size());
		return null;
		}

		@Override
		public int getItemCount() {
		return mCursorCount;
		return mModel.getItemCount();
		// return mCursorCount + mFooters.size();
		}

		@Override
		public int getItemViewType(int position) {
		if (position < mCursorCount) {
		final int itemCount = mModel.getItemCount();
		if (position < itemCount) {
		return 0;
		} else {
		position -= mCursorCount;
		position -= itemCount;
		return mFooters.get(position).getItemViewType();
		}
		}

		private boolean isEmpty() {
		return getItemCount() > 0;
		}
		}

		private static String formatTime(Context context, long when) {
		@@ -1328,27 +1293,6 @@ public class DirectoryFragment extends Fragment {
		return MimePredicate.mimeMatches(state.acceptMimes, docMimeType);
		}

		private List<DocumentInfo> getSelectedDocuments() {
		Selection sel = mSelectionManager.getSelection(new Selection());
		return getItemsAsDocuments(sel);
		}

		private List<DocumentInfo> getItemsAsDocuments(Selection items) {
		if (items == null \|\| items.size() == 0) {
		return new ArrayList<>(0);
		}

		final List<DocumentInfo> docs = new ArrayList<>(items.size());
		final int size = items.size();
		for (int i = 0; i < size; i++) {
		final Cursor cursor = mAdapter.getItem(items.get(i));
		checkNotNull(cursor, "Cursor cannot be null.");
		final DocumentInfo doc = DocumentInfo.fromDirectoryCursor(cursor);
		docs.add(doc);
		}
		return docs;
		}

		private void copyFromClipboard() {
		new AsyncTask<Void, Void, List<DocumentInfo>>() {

		@@ -1426,7 +1370,7 @@ public class DirectoryFragment extends Fragment {
		}

		void copySelectedToClipboard() {
		Selection sel = mSelectionManager.getSelection(new Selection());
		Selection sel = mModel.getSelection(new Selection());
		copySelectionToClipboard(sel);
		}

		@@ -1475,7 +1419,7 @@ public class DirectoryFragment extends Fragment {
		}

		void selectAllFiles() {
		boolean changed = mSelectionManager.setItemsSelected(0, mAdapter.getItemCount(), true);
		boolean changed = mModel.selectAll();
		if (changed) {
		updateDisplayState();
		}
		@@ -1521,7 +1465,7 @@ public class DirectoryFragment extends Fragment {
		int dstPosition = mRecView.getChildAdapterPosition(v);
		DocumentInfo dstDir = null;
		if (dstPosition != android.widget.AdapterView.INVALID_POSITION) {
		Cursor dstCursor = mAdapter.getItem(dstPosition);
		Cursor dstCursor = mModel.getItem(dstPosition);
		checkNotNull(dstCursor, "Cursor cannot be null.");
		dstDir = DocumentInfo.fromDirectoryCursor(dstCursor);
		// TODO: Do not drop into the directory where the documents came from.
		@@ -1556,16 +1500,16 @@ public class DirectoryFragment extends Fragment {
		return Collections.EMPTY_LIST;
		}

		final List<DocumentInfo> selectedDocs = getSelectedDocuments();
		final List<DocumentInfo> selectedDocs = mModel.getSelectedDocuments();
		if (!selectedDocs.isEmpty()) {
		if (!mSelectionManager.getSelection().contains(position)) {
		if (!mModel.isSelected(position)) {
		// There is a selection that does not include the current item, drag nothing.
		return Collections.EMPTY_LIST;
		}
		return selectedDocs;
		}

		final Cursor cursor = mAdapter.getItem(position);
		final Cursor cursor = mModel.getItem(position);
		checkNotNull(cursor, "Cursor cannot be null.");
		final DocumentInfo doc = DocumentInfo.fromDirectoryCursor(cursor);

		@@ -1671,12 +1615,14 @@ public class DirectoryFragment extends Fragment {
		mShadow.setBounds(0, 0, mShadowDimension, mShadowDimension);
		}

		@Override
		public void onProvideShadowMetrics(
		Point shadowSize, Point shadowTouchPoint) {
		shadowSize.set(mShadowDimension, mShadowDimension);
		shadowTouchPoint.set(mShadowDimension / 2, mShadowDimension / 2);
		}

		@Override
		public void onDrawShadow(Canvas canvas) {
		mShadow.draw(canvas);
		}
		@@ -1706,7 +1652,7 @@ public class DirectoryFragment extends Fragment {
		extends AsyncTask<Selection, Void, List<DocumentInfo>> {
		@Override
		protected final List<DocumentInfo> doInBackground(Selection... selected) {
		return getItemsAsDocuments(selected[0]);
		return mModel.getDocuments(selected[0]);
		}

		@Override
		@@ -1777,4 +1723,136 @@ public class DirectoryFragment extends Fragment {
		new BandSelectManager(fragment.mRecView, fragment.mSelectionManager);
		}
		}

		/**
		* The data model for the current loaded directory.
		*/
		private final class Model implements DocumentContext {
		private MultiSelectManager mSelectionManager;
		private int mCursorCount;
		private boolean mIsLoading;
		@Nullable private Cursor mCursor;
		@Nullable private String info;
		@Nullable private String error;

		/**
		* Sets the selection manager used by the model.
		* TODO: the model should instantiate the selection manager. See onActivityCreated.
		*/
		void setSelectionManager(MultiSelectManager mgr) {
		mSelectionManager = mgr;
		}

		/**
		* Selects all files in the current directory.
		* @return true if the selection state changed for any files.
		*/
		boolean selectAll() {
		return mSelectionManager.setItemsSelected(0, mCursorCount, true);
		}

		/**
		* Clones the current selection into the given Selection object.
		* @param selection
		* @return The selection that was passed in, for convenience.
		*/
		Selection getSelection(Selection selection) {
		return mSelectionManager.getSelection(selection);
		}

		/**
		* @return The current selection (the live instance, not a copy).
		*/
		Selection getSelection() {
		return mSelectionManager.getSelection();
		}

		boolean isSelected(int position) {
		return mSelectionManager.getSelection().contains(position);
		}

		void clearSelection() {
		mSelectionManager.clearSelection();
		}

		void update(DirectoryResult result) {
		if (DEBUG) Log.i(TAG, "Updating model with new result set.");

		if (result == null) {
		mCursor = null;
		mCursorCount = 0;
		info = null;
		error = null;
		mIsLoading = false;
		return;
		}

		if (result.exception != null) {
		Log.e(TAG, "Error while loading directory contents", result.exception);
		error = getString(R.string.query_error);
		return;
		}

		mCursor = result.cursor;
		mCursorCount = mCursor.getCount();

		final Bundle extras = mCursor.getExtras();
		if (extras != null) {
		info = extras.getString(DocumentsContract.EXTRA_INFO);
		error = extras.getString(DocumentsContract.EXTRA_ERROR);
		mIsLoading = extras.getBoolean(DocumentsContract.EXTRA_LOADING, false);
		}
		}

		private int getItemCount() {
		return mCursorCount;
		}

		private Cursor getItem(int position) {
		if (position >= mCursorCount) {
		throw new IndexOutOfBoundsException("Attempt to retrieve " + position + " of " +
		mCursorCount + " items");
		}

		mCursor.moveToPosition(position);
		return mCursor;
		}

		private boolean isEmpty() {
		return mCursorCount == 0;
		}

		private boolean isLoading() {
		return mIsLoading;
		}

		private List<DocumentInfo> getSelectedDocuments() {
		Selection sel = getSelection(new Selection());
		return getDocuments(sel);
		}

		private List<DocumentInfo> getDocuments(Selection items) {
		if (items == null \|\| items.size() == 0) {
		return new ArrayList<>(0);
		}

		final List<DocumentInfo> docs = new ArrayList<>(items.size());
		final int size = items.size();
		for (int i = 0; i < size; i++) {
		final Cursor cursor = getItem(items.get(i));
		checkNotNull(cursor, "Cursor cannot be null.");
		final DocumentInfo doc = DocumentInfo.fromDirectoryCursor(cursor);
		docs.add(doc);
		}
		return docs;
		}

		@Override
		public Cursor getCursor() {
		if (Looper.myLooper() != Looper.getMainLooper()) {
		throw new IllegalStateException("Can't call getCursor from non-main thread.");
		}
		return mCursor;
		}
		}
		}

packages/DocumentsUI/src/com/android/documentsui/MultiSelectManager.java

+3 −3

Original line number	Diff line number	Diff line
		@@ -177,13 +177,13 @@ public final class MultiSelectManager {

		/**
		* Returns a Selection object that provides a live view
		* on the current selection. Callers wishing to get
		* on the current selection.
		*
		* @see #getSelectionSnapshot() on how to get a snapshot
		* @see #getSelection(Selection) on how to get a snapshot
		* of the selection that will not reflect future changes
		* to selection.
		*
		* @return The current seleciton.
		* @return The current selection.
		*/
		public Selection getSelection() {
		return mSelection;