allow to delete attachments. fixes #1539

src/main/java/eu/siacs/conversations/crypto/PgpEngine.java

@@ -2,7 +2,6 @@ package eu.siacs.conversations.crypto;
 
 import android.app.PendingIntent;
 import android.content.Intent;
-import android.net.Uri;
 
 import org.openintents.openpgp.OpenPgpSignatureResult;
 import org.openintents.openpgp.util.OpenPgpApi;
@@ -106,7 +105,7 @@ public class PgpEngine {
 							PgpEngine.this.mXmppConnectionService
 									.updateMessage(message);
 							inputFile.delete();
-							mXmppConnectionService.getFileBackend().addImageFileToMedia(outputFile);
+							mXmppConnectionService.getFileBackend().updateMediaScanner(outputFile);
 							callback.success(message);
 							return;
 						case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED:

src/main/java/eu/siacs/conversations/http/HttpDownloadConnection.java

@@ -1,7 +1,5 @@
 package eu.siacs.conversations.http;
 
-import android.content.Intent;
-import android.net.Uri;
 import android.os.PowerManager;
 import android.util.Log;
 
@@ -10,12 +8,8 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
 import java.net.HttpURLConnection;
-import java.net.InetAddress;
-import java.net.InetSocketAddress;
 import java.net.MalformedURLException;
-import java.net.Proxy;
 import java.net.URL;
-import java.util.Arrays;
 import java.util.concurrent.CancellationException;
 
 import javax.net.ssl.HttpsURLConnection;
@@ -129,7 +123,7 @@ public class HttpDownloadConnection implements Transferable {
 	}
 
 	private void finish() {
-		mXmppConnectionService.getFileBackend().addImageFileToMedia(file);
+		mXmppConnectionService.getFileBackend().updateMediaScanner(file);
 		message.setTransferable(null);
 		mHttpConnectionManager.finishConnection(this);
 		if (message.getEncryption() == Message.ENCRYPTION_PGP) {

src/main/java/eu/siacs/conversations/http/HttpUploadConnection.java

@@ -1,8 +1,6 @@
 package eu.siacs.conversations.http;
 
 import android.app.PendingIntent;
-import android.content.Intent;
-import android.net.Uri;
 import android.os.PowerManager;
 import android.util.Log;
 import android.util.Pair;
@@ -12,10 +10,7 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
 import java.net.HttpURLConnection;
-import java.net.InetAddress;
-import java.net.InetSocketAddress;
 import java.net.MalformedURLException;
-import java.net.Proxy;
 import java.net.URL;
 
 import javax.net.ssl.HttpsURLConnection;
@@ -196,7 +191,7 @@ public class HttpUploadConnection implements Transferable {
 						mGetUrl = new URL(mGetUrl.toString() + "#" + CryptoHelper.bytesToHex(key));
 					}
 					mXmppConnectionService.getFileBackend().updateFileParams(message, mGetUrl);
-					mXmppConnectionService.getFileBackend().addImageFileToMedia(file);
+					mXmppConnectionService.getFileBackend().updateMediaScanner(file);
 					message.setTransferable(null);
 					message.setCounterpart(message.getConversation().getJid().toBareJid());
 					if (message.getEncryption() == Message.ENCRYPTION_DECRYPTED) {

src/main/java/eu/siacs/conversations/persistance/FileBackend.java

@@ -27,7 +27,6 @@ import java.security.DigestOutputStream;
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
 import java.text.SimpleDateFormat;
-import java.util.Arrays;
 import java.util.Date;
 import java.util.Locale;
 
@@ -35,7 +34,6 @@ import eu.siacs.conversations.Config;
 import eu.siacs.conversations.R;
 import eu.siacs.conversations.entities.DownloadableFile;
 import eu.siacs.conversations.entities.Message;
-import eu.siacs.conversations.entities.Transferable;
 import eu.siacs.conversations.services.XmppConnectionService;
 import eu.siacs.conversations.utils.CryptoHelper;
 import eu.siacs.conversations.utils.ExifHelper;
@@ -62,7 +60,7 @@ public class FileBackend {
 		}
 	}
 
-	public void addImageFileToMedia(File file) {
+	public void updateMediaScanner(File file) {
 		if (file.getAbsolutePath().startsWith(getConversationsImageDirectory())) {
 			Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
 			intent.setData(Uri.fromFile(file));
@@ -72,6 +70,16 @@ public class FileBackend {
 		}
 	}
 
+	public boolean deleteFile(Message message) {
+		File file = getFile(message);
+		if (file.delete()) {
+			updateMediaScanner(file);
+			return true;
+		} else {
+			return false;
+		}
+	}
+
 	public DownloadableFile getFile(Message message) {
 		return getFile(message, true);
 	}

src/main/java/eu/siacs/conversations/ui/ConversationFragment.java

@@ -527,6 +527,9 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 			relevantForCorrection = relevantForCorrection.next();
 		}
 		if (m.getType() != Message.TYPE_STATUS) {
+			final boolean treatAsFile = m.getType() != Message.TYPE_TEXT
+					&& m.getType() != Message.TYPE_PRIVATE
+					&& t == null;
 			activity.getMenuInflater().inflate(R.menu.message_context, menu);
 			menu.setHeaderTitle(R.string.message_options);
 			MenuItem copyText = menu.findItem(R.id.copy_text);
@@ -537,8 +540,8 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 			MenuItem copyUrl = menu.findItem(R.id.copy_url);
 			MenuItem downloadFile = menu.findItem(R.id.download_file);
 			MenuItem cancelTransmission = menu.findItem(R.id.cancel_transmission);
-			if ((m.getType() == Message.TYPE_TEXT || m.getType() == Message.TYPE_PRIVATE)
+			MenuItem deleteFile = menu.findItem(R.id.delete_file);
-					&& t == null
+			if (!treatAsFile
 					&& !GeoHelper.isGeoUri(m.getBody())
 					&& m.treatAsDownloadable() != Message.Decision.MUST) {
 				copyText.setVisible(true);
@@ -550,10 +553,7 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 					&& relevantForCorrection.isLastCorrectableMessage()) {
 				correctMessage.setVisible(true);
 			}
-			if ((m.getType() != Message.TYPE_TEXT
+			if (treatAsFile || (GeoHelper.isGeoUri(m.getBody()))) {
-					&& m.getType() != Message.TYPE_PRIVATE
-					&& t == null)
-					|| (GeoHelper.isGeoUri(m.getBody()))) {
 				shareWith.setVisible(true);
 			}
 			if (m.getStatus() == Message.STATUS_SEND_FAILED) {
@@ -575,6 +575,10 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 					|| m.getStatus() == Message.STATUS_OFFERED))) {
 				cancelTransmission.setVisible(true);
 			}
+			if (treatAsFile) {
+				deleteFile.setVisible(true);
+				deleteFile.setTitle(activity.getString(R.string.delete_x_file,UIHelper.getFileDescriptionString(activity, m)));
+			}
 		}
 	}
 
@@ -605,6 +609,9 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 			case R.id.retry_decryption:
 				retryDecryption(selectedMessage);
 				return true;
+			case R.id.delete_file:
+				deleteFile(selectedMessage);
+				return true;
 			default:
 				return super.onContextItemSelected(item);
 		}
@@ -643,12 +650,22 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 		}
 	}
 
+	private void deleteFile(Message message) {
+		if (activity.xmppConnectionService.getFileBackend().deleteFile(message)) {
+			message.setTransferable(new TransferablePlaceholder(Transferable.STATUS_DELETED));
+			activity.updateConversationList();
+			updateMessages();
+		}
+	}
+
 	private void resendMessage(Message message) {
 		if (message.getType() == Message.TYPE_FILE || message.getType() == Message.TYPE_IMAGE) {
 			DownloadableFile file = activity.xmppConnectionService.getFileBackend().getFile(message);
 			if (!file.exists()) {
 				Toast.makeText(activity, R.string.file_deleted, Toast.LENGTH_SHORT).show();
 				message.setTransferable(new TransferablePlaceholder(Transferable.STATUS_DELETED));
+				activity.updateConversationList();
+				updateMessages();
 				return;
 			}
 		}
@@ -690,7 +707,8 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 
 	private void retryDecryption(Message message) {
 		message.setEncryption(Message.ENCRYPTION_PGP);
-		activity.xmppConnectionService.updateConversationUi();
+		activity.updateConversationList();
+		updateMessages();
 		conversation.getAccount().getPgpDecryptionService().add(message);
 	}
 

src/main/java/eu/siacs/conversations/xmpp/jingle/JingleConnection.java

@@ -1,7 +1,5 @@
 package eu.siacs.conversations.xmpp.jingle;
 
-import android.content.Intent;
-import android.net.Uri;
 import android.util.Log;
 import android.util.Pair;
 
@@ -9,7 +7,6 @@ import java.io.FileNotFoundException;
 import java.io.InputStream;
 import java.io.OutputStream;
 import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Locale;
@@ -111,7 +108,7 @@ public class JingleConnection implements Transferable {
 			}
 			Log.d(Config.LOGTAG,"successfully transmitted file:" + file.getAbsolutePath()+" ("+file.getSha1Sum()+")");
 			if (message.getEncryption() != Message.ENCRYPTION_PGP) {
-				mXmppConnectionService.getFileBackend().addImageFileToMedia(file);
+				mXmppConnectionService.getFileBackend().updateMediaScanner(file);
 			} else {
 				account.getPgpDecryptionService().add(message);
 			}

src/main/res/menu/message_context.xml

@@ -33,5 +33,8 @@
         android:id="@+id/cancel_transmission"
         android:title="@string/cancel_transmission"
         android:visible="false"/>
-
+    <item
+        android:id="@+id/delete_file"
+        android:title="@string/delete_x_file"
+        android:visible="false"/>
 </menu>

src/main/res/values/strings.xml

@@ -385,6 +385,7 @@
 	<string name="choose_file">Choose file</string>
 	<string name="receiving_x_file">Receiving %1$s (%2$d%% completed)</string>
 	<string name="download_x_file">Download %s</string>
+	<string name="delete_x_file">Delete %s</string>
 	<string name="file">file</string>
 	<string name="open_x_file">Open %s</string>
 	<string name="sending_file">sending (%1$d%% completed)</string>