Java tutorial
// Copyright (C) 2009 The Android Open Source Project // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. package com.google.gerrit.client.auth.userpass; import com.google.gerrit.client.Gerrit; import com.google.gerrit.client.SignInDialog; import com.google.gerrit.client.rpc.GerritCallback; import com.google.gerrit.client.ui.SmallHeading; import com.google.gerrit.common.PageLinks; import com.google.gerrit.common.auth.SignInMode; import com.google.gerrit.common.auth.userpass.LoginResult; import com.google.gwt.core.client.Scheduler; import com.google.gwt.core.client.Scheduler.ScheduledCommand; import com.google.gwt.event.dom.client.ClickEvent; import com.google.gwt.event.dom.client.ClickHandler; import com.google.gwt.event.dom.client.KeyCodes; import com.google.gwt.event.dom.client.KeyPressEvent; import com.google.gwt.event.dom.client.KeyPressHandler; import com.google.gwt.user.client.DOM; import com.google.gwt.user.client.Window.Location; import com.google.gwt.user.client.ui.Button; import com.google.gwt.user.client.ui.FlowPanel; import com.google.gwt.user.client.ui.Grid; import com.google.gwt.user.client.ui.InlineLabel; import com.google.gwt.user.client.ui.PasswordTextBox; import com.google.gwt.user.client.ui.TextBox; import com.google.gwtexpui.globalkey.client.GlobalKey; import com.google.gwtexpui.globalkey.client.NpTextBox; public class UserPassSignInDialog extends SignInDialog { static { UserPassResources.I.css().ensureInjected(); } private final FlowPanel formBody; private FlowPanel errorLine; private InlineLabel errorMsg; private Button login; private Button close; private TextBox username; private TextBox password; public UserPassSignInDialog(final String token, final String initialErrorMsg) { super(SignInMode.SIGN_IN, token); setAutoHideEnabled(false); formBody = new FlowPanel(); formBody.setStyleName(UserPassResources.I.css().loginForm()); add(formBody); createHeaderText(); createErrorBox(); createUsernameBox(); if (initialErrorMsg != null) { showError(initialErrorMsg); } } @Override public void show() { super.show(); Scheduler.get().scheduleDeferred(new ScheduledCommand() { @Override public void execute() { username.setFocus(true); } }); } private void createHeaderText() { final FlowPanel headerText = new FlowPanel(); final SmallHeading headerLabel = new SmallHeading(); headerLabel.setText(Util.M.signInAt(Location.getHostName())); headerText.add(headerLabel); formBody.add(headerText); } private void createErrorBox() { errorLine = new FlowPanel(); DOM.setStyleAttribute(errorLine.getElement(), "visibility", "hidden"); errorLine.setStyleName(UserPassResources.I.css().error()); errorMsg = new InlineLabel(); errorLine.add(errorMsg); formBody.add(errorLine); } private void showError(final String msgText) { errorMsg.setText(msgText); DOM.setStyleAttribute(errorLine.getElement(), "visibility", ""); } private void hideError() { DOM.setStyleAttribute(errorLine.getElement(), "visibility", "hidden"); } private void createUsernameBox() { username = new NpTextBox(); username.setVisibleLength(25); username.addKeyPressHandler(new KeyPressHandler() { @Override public void onKeyPress(final KeyPressEvent event) { if (event.getNativeEvent().getKeyCode() == KeyCodes.KEY_ENTER) { event.preventDefault(); password.selectAll(); password.setFocus(true); } } }); password = new PasswordTextBox(); password.setVisibleLength(25); password.addKeyPressHandler(GlobalKey.STOP_PROPAGATION); password.addKeyPressHandler(new KeyPressHandler() { @Override public void onKeyPress(final KeyPressEvent event) { if (event.getNativeEvent().getKeyCode() == KeyCodes.KEY_ENTER) { event.preventDefault(); onLogin(); } } }); final FlowPanel buttons = new FlowPanel(); buttons.setStyleName(Gerrit.RESOURCES.css().errorDialogButtons()); login = new Button(); login.setText(Util.C.buttonSignIn()); login.addClickHandler(new ClickHandler() { @Override public void onClick(final ClickEvent event) { onLogin(); } }); buttons.add(login); close = new Button(); DOM.setStyleAttribute(close.getElement(), "marginLeft", "45px"); close.setText(Gerrit.C.signInDialogClose()); close.addClickHandler(new ClickHandler() { @Override public void onClick(ClickEvent event) { hide(); } }); buttons.add(close); final Grid formGrid = new Grid(3, 2); formGrid.setText(0, 0, Util.C.username()); formGrid.setText(1, 0, Util.C.password()); formGrid.setWidget(0, 1, username); formGrid.setWidget(1, 1, password); formGrid.setWidget(2, 1, buttons); formBody.add(formGrid); username.setTabIndex(1); password.setTabIndex(2); login.setTabIndex(3); close.setTabIndex(4); } private void enable(final boolean on) { username.setEnabled(on); password.setEnabled(on); login.setEnabled(on); } private void onLogin() { hideError(); final String user = username.getText(); if (user == null || user.equals("")) { showError(Util.C.usernameRequired()); username.setFocus(true); return; } final String pass = password.getText(); if (pass == null || pass.equals("")) { showError(Util.C.passwordRequired()); password.setFocus(true); return; } enable(false); Util.SVC.authenticate(user, pass, new GerritCallback<LoginResult>() { public void onSuccess(final LoginResult result) { if (result.success) { String to = token; if (!to.startsWith("/")) { to = "/" + to; } if (result.isNew && !token.startsWith(PageLinks.REGISTER + "/")) { to = PageLinks.REGISTER + to; } Location.replace(Location.getPath() + "login" + to); } else { final String message; switch (result.getError()) { case AUTHENTICATION_UNAVAILABLE: message = Util.M.authenticationUnavailable(result.getAuthType()); break; case INVALID_LOGIN: default: message = Util.C.invalidLogin(); } showError(message); enable(true); password.selectAll(); Scheduler.get().scheduleDeferred(new ScheduledCommand() { @Override public void execute() { password.setFocus(true); } }); } } @Override public void onFailure(final Throwable caught) { super.onFailure(caught); enable(true); } }); } }