fix rare npe

Daniel Gultsch created

Change summary

src/main/java/eu/siacs/conversations/ui/EnterJidDialog.java | 477 +++---
1 file changed, 247 insertions(+), 230 deletions(-)

Detailed changes

src/main/java/eu/siacs/conversations/ui/EnterJidDialog.java 🔗

@@ -22,6 +22,7 @@ import java.util.List;
 import eu.siacs.conversations.Config;
 import eu.siacs.conversations.R;
 import eu.siacs.conversations.databinding.EnterJidDialogBinding;
+import eu.siacs.conversations.services.XmppConnectionService;
 import eu.siacs.conversations.ui.adapter.KnownHostsAdapter;
 import eu.siacs.conversations.ui.interfaces.OnBackendConnected;
 import eu.siacs.conversations.ui.util.DelayedHintHelper;
@@ -29,234 +30,250 @@ import eu.siacs.conversations.xmpp.Jid;
 
 public class EnterJidDialog extends DialogFragment implements OnBackendConnected, TextWatcher {
 
-
-	private static final List<String> SUSPICIOUS_DOMAINS = Arrays.asList("conference","muc","room","rooms","chat");
-
-	private OnEnterJidDialogPositiveListener mListener = null;
-
-	private static final String TITLE_KEY = "title";
-	private static final String POSITIVE_BUTTON_KEY = "positive_button";
-	private static final String PREFILLED_JID_KEY = "prefilled_jid";
-	private static final String ACCOUNT_KEY = "account";
-	private static final String ALLOW_EDIT_JID_KEY = "allow_edit_jid";
-	private static final String ACCOUNTS_LIST_KEY = "activated_accounts_list";
-	private static final String SANITY_CHECK_JID = "sanity_check_jid";
-
-	private KnownHostsAdapter knownHostsAdapter;
-	private Collection<String> whitelistedDomains = Collections.emptyList();
-
-	private EnterJidDialogBinding binding;
-	private AlertDialog dialog;
-	private boolean sanityCheckJid = false;
-
-
-	private boolean issuedWarning = false;
-
-	public static EnterJidDialog newInstance(final List<String> activatedAccounts,
-	                                         final String title, final String positiveButton,
-	                                         final String prefilledJid, final String account,
-											 boolean allowEditJid, final boolean sanity_check_jid) {
-		EnterJidDialog dialog = new EnterJidDialog();
-		Bundle bundle = new Bundle();
-		bundle.putString(TITLE_KEY, title);
-		bundle.putString(POSITIVE_BUTTON_KEY, positiveButton);
-		bundle.putString(PREFILLED_JID_KEY, prefilledJid);
-		bundle.putString(ACCOUNT_KEY, account);
-		bundle.putBoolean(ALLOW_EDIT_JID_KEY, allowEditJid);
-		bundle.putStringArrayList(ACCOUNTS_LIST_KEY, (ArrayList<String>) activatedAccounts);
-		bundle.putBoolean(SANITY_CHECK_JID, sanity_check_jid);
-		dialog.setArguments(bundle);
-		return dialog;
-	}
-
-	@Override
-	public void onActivityCreated(Bundle savedInstanceState) {
-		super.onActivityCreated(savedInstanceState);
-		setRetainInstance(true);
-	}
-
-	@Override
-	public void onStart() {
-		super.onStart();
-		final Activity activity = getActivity();
-		if (activity instanceof XmppActivity && ((XmppActivity) activity).xmppConnectionService != null) {
-			refreshKnownHosts();
-		}
-	}
-
-	@NonNull
-	@Override
-	public Dialog onCreateDialog(Bundle savedInstanceState) {
-		final AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
-		builder.setTitle(getArguments().getString(TITLE_KEY));
-		binding = DataBindingUtil.inflate(getActivity().getLayoutInflater(), R.layout.enter_jid_dialog, null, false);
-		this.knownHostsAdapter = new KnownHostsAdapter(getActivity(), R.layout.simple_list_item);
-		binding.jid.setAdapter(this.knownHostsAdapter);
-		binding.jid.addTextChangedListener(this);
-		String prefilledJid = getArguments().getString(PREFILLED_JID_KEY);
-		if (prefilledJid != null) {
-			binding.jid.append(prefilledJid);
-			if (!getArguments().getBoolean(ALLOW_EDIT_JID_KEY)) {
-				binding.jid.setFocusable(false);
-				binding.jid.setFocusableInTouchMode(false);
-				binding.jid.setClickable(false);
-				binding.jid.setCursorVisible(false);
-			}
-		}
-		sanityCheckJid = getArguments().getBoolean(SANITY_CHECK_JID, false);
-
-		DelayedHintHelper.setHint(R.string.account_settings_example_jabber_id, binding.jid);
-
-		String account = getArguments().getString(ACCOUNT_KEY);
-		if (account == null) {
-			StartConversationActivity.populateAccountSpinner(getActivity(), getArguments().getStringArrayList(ACCOUNTS_LIST_KEY), binding.account);
-		} else {
-			ArrayAdapter<String> adapter = new ArrayAdapter<>(getActivity(),
-					R.layout.simple_list_item,
-					new String[]{account});
-			binding.account.setEnabled(false);
-			adapter.setDropDownViewResource(R.layout.simple_list_item);
-			binding.account.setAdapter(adapter);
-		}
-
-
-
-		builder.setView(binding.getRoot());
-		builder.setNegativeButton(R.string.cancel, null);
-		builder.setPositiveButton(getArguments().getString(POSITIVE_BUTTON_KEY), null);
-		this.dialog = builder.create();
-
-		View.OnClickListener dialogOnClick = v -> {
-			handleEnter(binding, account);
-		};
-
-		binding.jid.setOnEditorActionListener((v, actionId, event) -> {
-			handleEnter(binding, account);
-			return true;
-		});
-
-		dialog.show();
-		dialog.getButton(AlertDialog.BUTTON_POSITIVE).setOnClickListener(dialogOnClick);
-		return dialog;
-	}
-
-	private void handleEnter(EnterJidDialogBinding binding, String account) {
-		final Jid accountJid;
-		if (!binding.account.isEnabled() && account == null) {
-			return;
-		}
-		try {
-			if (Config.DOMAIN_LOCK != null) {
-				accountJid = Jid.ofEscaped((String) binding.account.getSelectedItem(), Config.DOMAIN_LOCK, null);
-			} else {
-				accountJid = Jid.ofEscaped((String) binding.account.getSelectedItem());
-			}
-		} catch (final IllegalArgumentException e) {
-			return;
-		}
-		final Jid contactJid;
-		try {
-			contactJid = Jid.ofEscaped(binding.jid.getText().toString());
-		} catch (final IllegalArgumentException e) {
-			binding.jidLayout.setError(getActivity().getString(R.string.invalid_jid));
-			return;
-		}
-
-		if (!issuedWarning && sanityCheckJid) {
-			if (contactJid.isDomainJid()) {
-				binding.jidLayout.setError(getActivity().getString(R.string.this_looks_like_a_domain));
-				dialog.getButton(AlertDialog.BUTTON_POSITIVE).setText(R.string.add_anway);
-				issuedWarning = true;
-				return;
-			}
-			if (suspiciousSubDomain(contactJid.getDomain().toEscapedString())) {
-				binding.jidLayout.setError(getActivity().getString(R.string.this_looks_like_channel));
-				dialog.getButton(AlertDialog.BUTTON_POSITIVE).setText(R.string.add_anway);
-				issuedWarning = true;
-				return;
-			}
-		}
-
-		if (mListener != null) {
-			try {
-				if (mListener.onEnterJidDialogPositive(accountJid, contactJid)) {
-					dialog.dismiss();
-				}
-			} catch (JidError error) {
-				binding.jidLayout.setError(error.toString());
-				dialog.getButton(AlertDialog.BUTTON_POSITIVE).setText(R.string.add);
-				issuedWarning = false;
-			}
-		}
-	}
-
-	public void setOnEnterJidDialogPositiveListener(OnEnterJidDialogPositiveListener listener) {
-		this.mListener = listener;
-	}
-
-	@Override
-	public void onBackendConnected() {
-		refreshKnownHosts();
-	}
-
-	private void refreshKnownHosts() {
-		Activity activity = getActivity();
-		if (activity instanceof XmppActivity) {
-			Collection<String> hosts = ((XmppActivity) activity).xmppConnectionService.getKnownHosts();
-			this.knownHostsAdapter.refresh(hosts);
-			this.whitelistedDomains = hosts;
-		}
-	}
-
-	@Override
-	public void beforeTextChanged(CharSequence s, int start, int count, int after) {
-
-	}
-
-	@Override
-	public void onTextChanged(CharSequence s, int start, int before, int count) {
-
-	}
-
-	@Override
-	public void afterTextChanged(Editable s) {
-		if (issuedWarning) {
-			dialog.getButton(AlertDialog.BUTTON_POSITIVE).setText(R.string.add);
-			binding.jidLayout.setError(null);
-			issuedWarning = false;
-		}
-	}
-
-	public interface OnEnterJidDialogPositiveListener {
-		boolean onEnterJidDialogPositive(Jid account, Jid contact) throws EnterJidDialog.JidError;
-	}
-
-	public static class JidError extends Exception {
-		final String msg;
-
-		public JidError(final String msg) {
-			this.msg = msg;
-		}
-
-		public String toString() {
-			return msg;
-		}
-	}
-
-	@Override
-	public void onDestroyView() {
-		Dialog dialog = getDialog();
-		if (dialog != null && getRetainInstance()) {
-			dialog.setDismissMessage(null);
-		}
-		super.onDestroyView();
-	}
-
-	private boolean suspiciousSubDomain(String domain) {
-		if (this.whitelistedDomains.contains(domain)) {
-			return false;
-		}
-		final String[] parts = domain.split("\\.");
-		return parts.length >= 3 && SUSPICIOUS_DOMAINS.contains(parts[0]);
-	}
+    private static final List<String> SUSPICIOUS_DOMAINS =
+            Arrays.asList("conference", "muc", "room", "rooms", "chat");
+
+    private OnEnterJidDialogPositiveListener mListener = null;
+
+    private static final String TITLE_KEY = "title";
+    private static final String POSITIVE_BUTTON_KEY = "positive_button";
+    private static final String PREFILLED_JID_KEY = "prefilled_jid";
+    private static final String ACCOUNT_KEY = "account";
+    private static final String ALLOW_EDIT_JID_KEY = "allow_edit_jid";
+    private static final String ACCOUNTS_LIST_KEY = "activated_accounts_list";
+    private static final String SANITY_CHECK_JID = "sanity_check_jid";
+
+    private KnownHostsAdapter knownHostsAdapter;
+    private Collection<String> whitelistedDomains = Collections.emptyList();
+
+    private EnterJidDialogBinding binding;
+    private AlertDialog dialog;
+    private boolean sanityCheckJid = false;
+
+    private boolean issuedWarning = false;
+
+    public static EnterJidDialog newInstance(
+            final List<String> activatedAccounts,
+            final String title,
+            final String positiveButton,
+            final String prefilledJid,
+            final String account,
+            boolean allowEditJid,
+            final boolean sanity_check_jid) {
+        EnterJidDialog dialog = new EnterJidDialog();
+        Bundle bundle = new Bundle();
+        bundle.putString(TITLE_KEY, title);
+        bundle.putString(POSITIVE_BUTTON_KEY, positiveButton);
+        bundle.putString(PREFILLED_JID_KEY, prefilledJid);
+        bundle.putString(ACCOUNT_KEY, account);
+        bundle.putBoolean(ALLOW_EDIT_JID_KEY, allowEditJid);
+        bundle.putStringArrayList(ACCOUNTS_LIST_KEY, (ArrayList<String>) activatedAccounts);
+        bundle.putBoolean(SANITY_CHECK_JID, sanity_check_jid);
+        dialog.setArguments(bundle);
+        return dialog;
+    }
+
+    @Override
+    public void onActivityCreated(Bundle savedInstanceState) {
+        super.onActivityCreated(savedInstanceState);
+        setRetainInstance(true);
+    }
+
+    @Override
+    public void onStart() {
+        super.onStart();
+        final Activity activity = getActivity();
+        if (activity instanceof XmppActivity
+                && ((XmppActivity) activity).xmppConnectionService != null) {
+            refreshKnownHosts();
+        }
+    }
+
+    @NonNull
+    @Override
+    public Dialog onCreateDialog(Bundle savedInstanceState) {
+        final AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
+        builder.setTitle(getArguments().getString(TITLE_KEY));
+        binding =
+                DataBindingUtil.inflate(
+                        getActivity().getLayoutInflater(), R.layout.enter_jid_dialog, null, false);
+        this.knownHostsAdapter = new KnownHostsAdapter(getActivity(), R.layout.simple_list_item);
+        binding.jid.setAdapter(this.knownHostsAdapter);
+        binding.jid.addTextChangedListener(this);
+        String prefilledJid = getArguments().getString(PREFILLED_JID_KEY);
+        if (prefilledJid != null) {
+            binding.jid.append(prefilledJid);
+            if (!getArguments().getBoolean(ALLOW_EDIT_JID_KEY)) {
+                binding.jid.setFocusable(false);
+                binding.jid.setFocusableInTouchMode(false);
+                binding.jid.setClickable(false);
+                binding.jid.setCursorVisible(false);
+            }
+        }
+        sanityCheckJid = getArguments().getBoolean(SANITY_CHECK_JID, false);
+
+        DelayedHintHelper.setHint(R.string.account_settings_example_jabber_id, binding.jid);
+
+        String account = getArguments().getString(ACCOUNT_KEY);
+        if (account == null) {
+            StartConversationActivity.populateAccountSpinner(
+                    getActivity(),
+                    getArguments().getStringArrayList(ACCOUNTS_LIST_KEY),
+                    binding.account);
+        } else {
+            ArrayAdapter<String> adapter =
+                    new ArrayAdapter<>(
+                            getActivity(), R.layout.simple_list_item, new String[] {account});
+            binding.account.setEnabled(false);
+            adapter.setDropDownViewResource(R.layout.simple_list_item);
+            binding.account.setAdapter(adapter);
+        }
+
+        builder.setView(binding.getRoot());
+        builder.setNegativeButton(R.string.cancel, null);
+        builder.setPositiveButton(getArguments().getString(POSITIVE_BUTTON_KEY), null);
+        this.dialog = builder.create();
+
+        View.OnClickListener dialogOnClick =
+                v -> {
+                    handleEnter(binding, account);
+                };
+
+        binding.jid.setOnEditorActionListener(
+                (v, actionId, event) -> {
+                    handleEnter(binding, account);
+                    return true;
+                });
+
+        dialog.show();
+        dialog.getButton(AlertDialog.BUTTON_POSITIVE).setOnClickListener(dialogOnClick);
+        return dialog;
+    }
+
+    private void handleEnter(EnterJidDialogBinding binding, String account) {
+        final Jid accountJid;
+        if (!binding.account.isEnabled() && account == null) {
+            return;
+        }
+        try {
+            if (Config.DOMAIN_LOCK != null) {
+                accountJid =
+                        Jid.ofEscaped(
+                                (String) binding.account.getSelectedItem(),
+                                Config.DOMAIN_LOCK,
+                                null);
+            } else {
+                accountJid = Jid.ofEscaped((String) binding.account.getSelectedItem());
+            }
+        } catch (final IllegalArgumentException e) {
+            return;
+        }
+        final Jid contactJid;
+        try {
+            contactJid = Jid.ofEscaped(binding.jid.getText().toString());
+        } catch (final IllegalArgumentException e) {
+            binding.jidLayout.setError(getActivity().getString(R.string.invalid_jid));
+            return;
+        }
+
+        if (!issuedWarning && sanityCheckJid) {
+            if (contactJid.isDomainJid()) {
+                binding.jidLayout.setError(
+                        getActivity().getString(R.string.this_looks_like_a_domain));
+                dialog.getButton(AlertDialog.BUTTON_POSITIVE).setText(R.string.add_anway);
+                issuedWarning = true;
+                return;
+            }
+            if (suspiciousSubDomain(contactJid.getDomain().toEscapedString())) {
+                binding.jidLayout.setError(
+                        getActivity().getString(R.string.this_looks_like_channel));
+                dialog.getButton(AlertDialog.BUTTON_POSITIVE).setText(R.string.add_anway);
+                issuedWarning = true;
+                return;
+            }
+        }
+
+        if (mListener != null) {
+            try {
+                if (mListener.onEnterJidDialogPositive(accountJid, contactJid)) {
+                    dialog.dismiss();
+                }
+            } catch (JidError error) {
+                binding.jidLayout.setError(error.toString());
+                dialog.getButton(AlertDialog.BUTTON_POSITIVE).setText(R.string.add);
+                issuedWarning = false;
+            }
+        }
+    }
+
+    public void setOnEnterJidDialogPositiveListener(OnEnterJidDialogPositiveListener listener) {
+        this.mListener = listener;
+    }
+
+    @Override
+    public void onBackendConnected() {
+        refreshKnownHosts();
+    }
+
+    private void refreshKnownHosts() {
+        final Activity activity = getActivity();
+        if (activity instanceof XmppActivity) {
+            final XmppConnectionService service = ((XmppActivity) activity).xmppConnectionService;
+            if (service == null) {
+                return;
+            }
+            final Collection<String> hosts = service.getKnownHosts();
+            this.knownHostsAdapter.refresh(hosts);
+            this.whitelistedDomains = hosts;
+        }
+    }
+
+    @Override
+    public void beforeTextChanged(CharSequence s, int start, int count, int after) {}
+
+    @Override
+    public void onTextChanged(CharSequence s, int start, int before, int count) {}
+
+    @Override
+    public void afterTextChanged(Editable s) {
+        if (issuedWarning) {
+            dialog.getButton(AlertDialog.BUTTON_POSITIVE).setText(R.string.add);
+            binding.jidLayout.setError(null);
+            issuedWarning = false;
+        }
+    }
+
+    public interface OnEnterJidDialogPositiveListener {
+        boolean onEnterJidDialogPositive(Jid account, Jid contact) throws EnterJidDialog.JidError;
+    }
+
+    public static class JidError extends Exception {
+        final String msg;
+
+        public JidError(final String msg) {
+            this.msg = msg;
+        }
+
+        @NonNull
+        public String toString() {
+            return msg;
+        }
+    }
+
+    @Override
+    public void onDestroyView() {
+        Dialog dialog = getDialog();
+        if (dialog != null && getRetainInstance()) {
+            dialog.setDismissMessage(null);
+        }
+        super.onDestroyView();
+    }
+
+    private boolean suspiciousSubDomain(String domain) {
+        if (this.whitelistedDomains.contains(domain)) {
+            return false;
+        }
+        final String[] parts = domain.split("\\.");
+        return parts.length >= 3 && SUSPICIOUS_DOMAINS.contains(parts[0]);
+    }
 }