[android] Hide role-dependant private group menu items by default

and only enable them once we know our role

briar-android/src/main/java/org/briarproject/briar/android/conversation/AttachmentController.java

@@ -6,6 +6,8 @@ import android.support.annotation.Nullable;
 import android.support.media.ExifInterface;
 import android.webkit.MimeTypeMap;
 
+import com.bumptech.glide.util.MarkEnforcingInputStream;
+
 import org.briarproject.bramble.api.Pair;
 import org.briarproject.bramble.api.db.DatabaseExecutor;
 import org.briarproject.bramble.api.db.DbException;
@@ -44,6 +46,7 @@ class AttachmentController {
 
 	private static final Logger LOG =
 			getLogger(AttachmentController.class.getName());
+	private static final int READ_LIMIT = 1024 * 8192;
 
 	private final MessagingManager messagingManager;
 	private final int defaultSize;
@@ -128,8 +131,9 @@ class AttachmentController {
 		}
 
 		Size size = new Size();
-		InputStream is = new BufferedInputStream(a.getStream());
-		is.mark(Integer.MAX_VALUE);
+		InputStream is = new MarkEnforcingInputStream(
+				new BufferedInputStream(a.getStream()));
+		is.mark(READ_LIMIT);
 		try {
 			// use exif to get size
 			if (h.getContentType().equals("image/jpeg")) {
@@ -142,6 +146,8 @@ class AttachmentController {
 			// use BitmapFactory to get size
 			if (size.error) {
 				is.reset();
+				// need to mark again to re-add read limit
+				is.mark(READ_LIMIT);
 				size = getSizeFromBitmap(is);
 			}
 		} catch (IOException e) {
@@ -158,12 +164,11 @@ class AttachmentController {
 		}
 		// get file extension
 		String extension = getExtensionFromMimeType(size.mimeType);
-		if (extension == null) {
-			return new AttachmentItem(messageId, 0, 0, "", "", 0, 0, true);
-		}
+		boolean hasError = extension == null || size.error;
+		if (extension == null) extension = "";
 		return new AttachmentItem(messageId, size.width, size.height,
 				size.mimeType, extension, thumbnailSize.width,
-				thumbnailSize.height, size.error);
+				thumbnailSize.height, hasError);
 	}
 
 	@Nullable

briar-android/src/main/java/org/briarproject/briar/android/conversation/ConversationActivity.java

@@ -8,7 +8,6 @@ import android.content.DialogInterface;
 import android.content.Intent;
 import android.net.Uri;
 import android.os.Bundle;
-import android.os.Parcelable;
 import android.support.annotation.Nullable;
 import android.support.annotation.UiThread;
 import android.support.design.widget.Snackbar;
@@ -108,6 +107,7 @@ import static android.support.v4.app.ActivityOptionsCompat.makeSceneTransitionAn
 import static android.support.v4.view.ViewCompat.setTransitionName;
 import static android.support.v7.util.SortedList.INVALID_POSITION;
 import static android.view.Gravity.RIGHT;
+import static android.widget.Toast.LENGTH_LONG;
 import static android.widget.Toast.LENGTH_SHORT;
 import static java.util.Collections.emptyList;
 import static java.util.Collections.sort;
@@ -121,9 +121,9 @@ import static org.briarproject.bramble.util.StringUtils.isNullOrEmpty;
 import static org.briarproject.briar.android.TestingConstants.FEATURE_FLAG_IMAGE_ATTACHMENTS;
 import static org.briarproject.briar.android.activity.RequestCodes.REQUEST_ATTACH_IMAGE;
 import static org.briarproject.briar.android.activity.RequestCodes.REQUEST_INTRODUCTION;
-import static org.briarproject.briar.android.conversation.ImageActivity.ATTACHMENTS;
 import static org.briarproject.briar.android.conversation.ImageActivity.ATTACHMENT_POSITION;
 import static org.briarproject.briar.android.conversation.ImageActivity.DATE;
+import static org.briarproject.briar.android.conversation.ImageActivity.ATTACHMENTS;
 import static org.briarproject.briar.android.conversation.ImageActivity.NAME;
 import static org.briarproject.briar.android.settings.SettingsFragment.SETTINGS_NAMESPACE;
 import static org.briarproject.briar.android.util.UiUtils.getAvatarTransitionName;
@@ -194,8 +194,6 @@ public class ConversationActivity extends BriarActivity
 	ViewModelProvider.Factory viewModelFactory;
 
 	private volatile ContactId contactId;
-	@Nullable
-	private Parcelable layoutManagerState;
 
 	private final Observer<String> contactNameObserver = name -> {
 		requireNonNull(name);
@@ -311,21 +309,6 @@ public class ConversationActivity extends BriarActivity
 		list.stopPeriodicUpdate();
 	}
 
-	@Override
-	protected void onSaveInstanceState(Bundle outState) {
-		super.onSaveInstanceState(outState);
-		if (layoutManager != null) {
-			layoutManagerState = layoutManager.onSaveInstanceState();
-			outState.putParcelable("layoutManager", layoutManagerState);
-		}
-	}
-
-	@Override
-	protected void onRestoreInstanceState(Bundle savedInstanceState) {
-		super.onRestoreInstanceState(savedInstanceState);
-		layoutManagerState = savedInstanceState.getParcelable("layoutManager");
-	}
-
 	@Override
 	public boolean onCreateOptionsMenu(Menu menu) {
 		// Inflate the menu items for use in the action bar
@@ -445,12 +428,8 @@ public class ConversationActivity extends BriarActivity
 				List<ConversationItem> items = createItems(headers);
 				adapter.addAll(items);
 				list.showData();
-				if (layoutManagerState == null) {
-					// Scroll to the bottom
-					list.scrollToPosition(adapter.getItemCount() - 1);
-				} else {
-					layoutManager.onRestoreInstanceState(layoutManagerState);
-				}
+				// Scroll to the bottom
+				list.scrollToPosition(adapter.getItemCount() - 1);
 			} else {
 				LOG.info("Concurrent update, reloading");
 				loadMessages();
@@ -492,8 +471,7 @@ public class ConversationActivity extends BriarActivity
 					adapter.getMessageItem(m);
 			if (pair != null) {
 				pair.getSecond().setText(text);
-				boolean bottom = layoutManagerState == null &&
-						adapter.isScrolledToBottom(layoutManager);
+				boolean bottom = adapter.isScrolledToBottom(layoutManager);
 				adapter.notifyItemChanged(pair.getFirst());
 				if (bottom) list.scrollToPosition(adapter.getItemCount() - 1);
 			}
@@ -524,8 +502,7 @@ public class ConversationActivity extends BriarActivity
 					adapter.getMessageItem(m);
 			if (pair != null) {
 				pair.getSecond().setAttachments(items);
-				boolean bottom = layoutManagerState == null &&
-						adapter.isScrolledToBottom(layoutManager);
+				boolean bottom = adapter.isScrolledToBottom(layoutManager);
 				adapter.notifyItemChanged(pair.getFirst());
 				if (bottom) list.scrollToPosition(adapter.getItemCount() - 1);
 			}
@@ -576,8 +553,7 @@ public class ConversationActivity extends BriarActivity
 
 	private void addConversationItem(ConversationItem item) {
 		runOnUiThreadUnlessDestroyed(() -> {
-			boolean bottom = layoutManagerState == null &&
-					adapter.isScrolledToBottom(layoutManager);
+			boolean bottom = adapter.isScrolledToBottom(layoutManager);
 			adapter.incrementRevision();
 			adapter.add(item);
 			if (bottom) list.scrollToPosition(adapter.getItemCount() - 1);
@@ -844,11 +820,15 @@ public class ConversationActivity extends BriarActivity
 		i.putExtra(ATTACHMENT_POSITION, attachments.indexOf(item));
 		i.putExtra(NAME, name);
 		i.putExtra(DATE, messageItem.getTime());
-		// restoring list position should not trigger android bug #224270
-		String transitionName = item.getTransitionName();
-		ActivityOptionsCompat options =
-				makeSceneTransitionAnimation(this, view, transitionName);
-		ActivityCompat.startActivity(this, i, options.toBundle());
+		if (SDK_INT >= 23) {
+			String transitionName = item.getTransitionName();
+			ActivityOptionsCompat options =
+					makeSceneTransitionAnimation(this, view, transitionName);
+			ActivityCompat.startActivity(this, i, options.toBundle());
+		} else {
+			// work-around for android bug #224270
+			startActivity(i);
+		}
 	}
 
 	@DatabaseExecutor

briar-android/src/main/java/org/briarproject/briar/android/conversation/ImageActivity.java

@@ -82,7 +82,7 @@ public class ImageActivity extends BriarActivity
 		super.onCreate(state);
 
 		// Transitions
-		if (state == null) supportPostponeEnterTransition();
+		supportPostponeEnterTransition();
 		Window window = getWindow();
 		if (SDK_INT >= 21) {
 			Transition transition = new Fade();
@@ -298,18 +298,13 @@ public class ImageActivity extends BriarActivity
 
 	private class ImagePagerAdapter extends FragmentStatePagerAdapter {
 
-		private boolean isFirst = true;
-
 		private ImagePagerAdapter(FragmentManager fm) {
 			super(fm);
 		}
 
 		@Override
 		public Fragment getItem(int position) {
-			Fragment f = ImageFragment
-					.newInstance(attachments.get(position), isFirst);
-			isFirst = false;
-			return f;
+			return ImageFragment.newInstance(attachments.get(position));
 		}
 
 		@Override

briar-android/src/main/java/org/briarproject/briar/android/conversation/ImageFragment.java

@@ -35,21 +35,17 @@ import static org.briarproject.briar.android.conversation.ImageActivity.ATTACHME
 @ParametersAreNonnullByDefault
 public class ImageFragment extends Fragment {
 
-	private final static String IS_FIRST = "isFirst";
-
 	@Inject
 	ViewModelProvider.Factory viewModelFactory;
 
 	private AttachmentItem attachment;
-	private boolean isFirst;
 	private ImageViewModel viewModel;
 	private PhotoView photoView;
 
-	static ImageFragment newInstance(AttachmentItem a, boolean isFirst) {
+	static ImageFragment newInstance(AttachmentItem a) {
 		ImageFragment f = new ImageFragment();
 		Bundle args = new Bundle();
 		args.putParcelable(ATTACHMENT_POSITION, a);
-		args.putBoolean(IS_FIRST, isFirst);
 		f.setArguments(args);
 		return f;
 	}
@@ -67,7 +63,6 @@ public class ImageFragment extends Fragment {
 
 		Bundle args = requireNonNull(getArguments());
 		attachment = requireNonNull(args.getParcelable(ATTACHMENT_POSITION));
-		isFirst = args.getBoolean(IS_FIRST);
 	}
 
 	@Nullable
@@ -82,6 +77,7 @@ public class ImageFragment extends Fragment {
 				viewModelFactory).get(ImageViewModel.class);
 
 		photoView = v.findViewById(R.id.photoView);
+		photoView.setScaleLevels(1, 2, 4);
 		photoView.setOnClickListener(view -> viewModel.clickImage());
 
 		// Request Listener
@@ -90,7 +86,7 @@ public class ImageFragment extends Fragment {
 			public boolean onLoadFailed(@Nullable GlideException e,
 					Object model, Target<Drawable> target,
 					boolean isFirstResource) {
-				if (getActivity() != null && isFirst)
+				if (getActivity() != null)
 					getActivity().supportStartPostponedEnterTransition();
 				return false;
 			}
@@ -109,9 +105,8 @@ public class ImageFragment extends Fragment {
 				if (viewModel.isOverlappingToolbar(photoView, resource)) {
 					photoView.setScaleType(FIT_START);
 				}
-				if (getActivity() != null && isFirst) {
+				if (getActivity() != null)
 					getActivity().supportStartPostponedEnterTransition();
-				}
 				return false;
 			}
 		};
@@ -119,9 +114,10 @@ public class ImageFragment extends Fragment {
 		// Load Image
 		GlideApp.with(this)
 				.load(attachment)
+				// TODO allow if size < maxTextureSize ?
+//				.override(SIZE_ORIGINAL)
 				.diskCacheStrategy(NONE)
 				.error(R.drawable.ic_image_broken)
-				.dontTransform()
 				.addListener(listener)
 				.into(photoView);
 

briar-android/src/main/java/org/briarproject/briar/android/conversation/ImageViewHolder.java

@@ -15,7 +15,6 @@ import org.briarproject.briar.android.conversation.glide.BriarImageTransformatio
 import org.briarproject.briar.android.conversation.glide.GlideApp;
 import org.briarproject.briar.android.conversation.glide.Radii;
 
-import static android.os.Build.VERSION.SDK_INT;
 import static com.bumptech.glide.load.engine.DiskCacheStrategy.NONE;
 import static com.bumptech.glide.load.resource.drawable.DrawableTransitionOptions.withCrossFade;
 
@@ -43,9 +42,6 @@ class ImageViewHolder extends ViewHolder {
 		} else {
 			setImageViewDimensions(attachment, single, needsStretch);
 			loadImage(attachment, r);
-			if (SDK_INT >= 21) {
-				imageView.setTransitionName(attachment.getTransitionName());
-			}
 		}
 	}
 

briar-android/src/main/java/org/briarproject/briar/android/conversation/ImageViewModel.java

@@ -50,9 +50,12 @@ public class ImageViewModel extends AndroidViewModel {
 	@IoExecutor
 	private final Executor ioExecutor;
 
+	/**
+	 * true means there was an error saving the image, false if image was saved.
+	 */
+	private final MutableLiveData<Boolean> saveState = new MutableLiveData<>();
 	private final MutableLiveData<Boolean> imageClicked =
 			new MutableLiveData<>();
-	private final MutableLiveData<Boolean> saveState = new MutableLiveData<>();
 	private int toolbarTop, toolbarBottom;
 
 	@Inject
@@ -106,8 +109,9 @@ public class ImageViewModel extends AndroidViewModel {
 	}
 
 	/**
-	 * A LiveData that is true if the image was saved,
-	 * false if there was an error and null otherwise.
+	 * A LiveData that is true if there was an error
+	 * and false if the image was saved.
+	 * It can be null otherwise, if no image was saved recently.
 	 *
 	 * Call {@link #onSaveStateSeen()} after consuming an update.
 	 */
@@ -126,7 +130,7 @@ public class ImageViewModel extends AndroidViewModel {
 	@UiThread
 	void saveImage(AttachmentItem attachment, @Nullable Uri uri) {
 		if (uri == null) {
-			saveState.setValue(false);
+			saveState.setValue(true);
 		} else {
 			saveImage(attachment, () -> getOutputStream(uri), null);
 		}

briar-android/src/main/java/org/briarproject/briar/android/privategroup/conversation/GroupActivity.java

@@ -138,7 +138,6 @@ public class GroupActivity extends
 		inviteMenuItem = menu.findItem(R.id.action_group_invite);
 		leaveMenuItem = menu.findItem(R.id.action_group_leave);
 		dissolveMenuItem = menu.findItem(R.id.action_group_dissolve);
-		showMenuItems();
 
 		return super.onCreateOptionsMenu(menu);
 	}
@@ -208,7 +207,6 @@ public class GroupActivity extends
 	}
 
 	private void showMenuItems() {
-		if (leaveMenuItem == null || dissolveMenuItem == null) return;
 		if (isCreator) {
 			revealMenuItem.setVisible(false);
 			inviteMenuItem.setVisible(true);

briar-android/src/main/res/layout/activity_conversation.xml

@@ -49,8 +49,7 @@
 		android:id="@+id/conversationView"
 		android:layout_width="match_parent"
 		android:layout_height="0dp"
-		android:layout_weight="2"
-		app:scrollToEnd="false"/>
+		android:layout_weight="2"/>
 
 	<org.briarproject.briar.android.view.ImagePreview
 		android:id="@+id/imagePreview"

briar-android/src/main/res/menu/group_actions.xml

@@ -1,13 +1,16 @@
 <?xml version="1.0" encoding="utf-8"?>
 <menu
 	xmlns:android="http://schemas.android.com/apk/res/android"
-	xmlns:app="http://schemas.android.com/apk/res-auto">
+	xmlns:app="http://schemas.android.com/apk/res-auto"
+	xmlns:tools="http://schemas.android.com/tools">
 
 	<item
 		android:id="@+id/action_group_invite"
 		android:icon="@drawable/social_share_white"
 		android:title="@string/groups_invite_members"
-		app:showAsAction="ifRoom"/>
+		android:visible="false"
+		app:showAsAction="ifRoom"
+		tools:visible="true"/>
 
 	<item
 		android:id="@+id/action_group_member_list"
@@ -19,18 +22,24 @@
 		android:id="@+id/action_group_reveal"
 		android:icon="@drawable/ic_visibility_white"
 		android:title="@string/groups_reveal_contacts"
-		app:showAsAction="never"/>
+		android:visible="false"
+		app:showAsAction="never"
+		tools:visible="true"/>
 
 	<item
 		android:id="@+id/action_group_leave"
 		android:icon="@drawable/action_delete_white"
 		android:title="@string/groups_leave"
-		app:showAsAction="never"/>
+		android:visible="false"
+		app:showAsAction="never"
+		tools:visible="true"/>
 
 	<item
 		android:id="@+id/action_group_dissolve"
 		android:icon="@drawable/action_delete_white"
 		android:title="@string/groups_dissolve"
-		app:showAsAction="never"/>
+		android:visible="false"
+		app:showAsAction="never"
+		tools:visible="true"/>
 
 </menu>

briar-core/src/main/java/org/briarproject/briar/messaging/MessagingManagerImpl.java

@@ -32,11 +32,11 @@ import org.briarproject.briar.api.messaging.PrivateMessageHeader;
 import org.briarproject.briar.api.messaging.event.PrivateMessageReceivedEvent;
 import org.briarproject.briar.client.ConversationClientImpl;
 
+import java.io.ByteArrayInputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.util.ArrayList;
 import java.util.Collection;
-import java.util.List;
 import java.util.Map;
 import java.util.Random;
 
@@ -44,7 +44,7 @@ import javax.annotation.concurrent.Immutable;
 import javax.inject.Inject;
 
 import static java.util.Collections.emptyList;
-import static java.util.logging.Logger.getLogger;
+import static org.briarproject.bramble.util.StringUtils.fromHexString;
 import static org.briarproject.briar.client.MessageTrackerConstants.MSG_KEY_READ;
 
 @Immutable
@@ -219,18 +219,8 @@ class MessagingManagerImpl extends ConversationClientImpl
 				long timestamp = meta.getLong("timestamp");
 				boolean local = meta.getBoolean("local");
 				boolean read = meta.getBoolean("read");
-				// TODO replace fake attachments by real ones
-				int num = (int) (timestamp % 5);
-				boolean hasText = num == 0 || id.hashCode() % 2 == 0;
-				List<AttachmentHeader> attachments = new ArrayList<>(num);
-				for (int i = 0; i < num; i++) {
-					byte[] aIdBytes = id.getBytes().clone();
-					aIdBytes[0] = (byte) i;
-					MessageId aId = new MessageId(aIdBytes);
-					attachments.add(new AttachmentHeader(aId, "image/jpeg"));
-				}
 				headers.add(new PrivateMessageHeader(id, g, timestamp, local,
-						read, s.isSent(), s.isSeen(), hasText, attachments));
+						read, s.isSent(), s.isSeen(), true, emptyList()));
 			} catch (FormatException e) {
 				throw new DbException(e);
 			}
@@ -251,30 +241,11 @@ class MessagingManagerImpl extends ConversationClientImpl
 	@Override
 	public Attachment getAttachment(MessageId m) {
 		// TODO add real implementation
-		String[] files = new String[] {
-//				"error_animated.gif",
-//				"error_high.jpg",
-//				"error_wide.jpg",
-//				"error_huge.gif",
-//				"error_large.gif",
-//				"error_malformed.jpg",
-//				"wide.jpg",
-//				"high.jpg",
-//				"small.png",
-				"kitten1.jpg",
-				"kitten2.jpg",
-				"kitten3.gif",
-				"kitten4.jpg",
-				"kitten5.jpg",
-				"kitten6.png",
-		};
-		int index = Math.abs(m.hashCode() % files.length);
-		String file = files[index];
-		getLogger(MessagingManagerImpl.class.getName())
-				.warning("Loading file: " + file);
-
-		InputStream is = getClass().getClassLoader().getResourceAsStream(file);
-		return new Attachment(is);
+		byte[] bytes = fromHexString("89504E470D0A1A0A0000000D49484452" +
+				"000000010000000108060000001F15C4" +
+				"890000000A49444154789C6300010000" +
+				"0500010D0A2DB40000000049454E44AE426082");
+		return new Attachment(new ByteArrayInputStream(bytes));
 	}
 
 }