Java tutorial
/* * NewConnectionSnippetHost.java * * Copyright (C) 2009-17 by RStudio, Inc. * * Unless you have received this program directly from RStudio pursuant * to the terms of a commercial license agreement with RStudio, then * this program is licensed to you under the terms of version 3 of the * GNU Affero General Public License. This program is distributed WITHOUT * ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING THOSE OF NON-INFRINGEMENT, * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Please refer to the * AGPL (http://www.gnu.org/licenses/agpl-3.0.txt) for more details. * */ package org.rstudio.studio.client.workbench.views.connections.ui; import java.util.ArrayList; import java.util.Collections; import java.util.Comparator; import java.util.HashMap; import org.rstudio.core.client.StringUtil; import org.rstudio.core.client.widget.MessageDialog; import org.rstudio.core.client.widget.Operation; import org.rstudio.core.client.widget.OperationWithInput; import org.rstudio.core.client.widget.ProgressIndicator; import org.rstudio.core.client.widget.ThemedButton; import org.rstudio.studio.client.RStudioGinjector; import org.rstudio.studio.client.common.DelayedProgressRequestCallback; import org.rstudio.studio.client.server.ServerError; import org.rstudio.studio.client.workbench.views.connections.model.ConnectionOptions; import org.rstudio.studio.client.workbench.views.connections.model.ConnectionsServerOperations; import org.rstudio.studio.client.workbench.views.connections.model.NewConnectionContext.NewConnectionInfo; import org.rstudio.studio.client.workbench.views.connections.res.NewConnectionSnippetHostResources; import com.google.gwt.core.client.GWT; import com.google.gwt.event.dom.client.ChangeEvent; import com.google.gwt.event.dom.client.ChangeHandler; import com.google.gwt.event.dom.client.ClickEvent; import com.google.gwt.event.dom.client.ClickHandler; import com.google.gwt.regexp.shared.MatchResult; import com.google.gwt.regexp.shared.RegExp; import com.google.gwt.resources.client.ClientBundle; import com.google.gwt.resources.client.CssResource; import com.google.gwt.safehtml.shared.SafeHtmlBuilder; import com.google.gwt.user.client.ui.Composite; import com.google.gwt.user.client.ui.Grid; import com.google.gwt.user.client.ui.HTML; import com.google.gwt.user.client.ui.HasVerticalAlignment; import com.google.gwt.user.client.ui.HorizontalPanel; import com.google.gwt.user.client.ui.Label; import com.google.gwt.user.client.ui.TextArea; import com.google.gwt.user.client.ui.TextBox; import com.google.gwt.user.client.ui.TextBoxBase; import com.google.gwt.user.client.ui.VerticalPanel; import com.google.gwt.user.client.ui.Widget; import com.google.inject.Inject; public class NewConnectionSnippetHost extends Composite { @Inject private void initialize(ConnectionsServerOperations server) { server_ = server; } public void onBeforeActivate(Operation operation, NewConnectionInfo info) { initialize(operation, info); } public void onActivate(ProgressIndicator indicator) { } public void onDeactivate(Operation operation) { operation.execute(); } public NewConnectionSnippetHost() { RStudioGinjector.INSTANCE.injectMembers(this); newConnectionSnippetHostResources_ = GWT.create(NewConnectionSnippetHostResources.class); initWidget(createWidget()); } private void initialize(final Operation operation, final NewConnectionInfo info) { info_ = info; parametersPanel_.clear(); parametersPanel_.add(createParameterizedUI(info)); snippetParts_ = parseSnippet(info.getSnippet()); updateCodePanel(); operation.execute(); } private ArrayList<NewConnectionSnippetParts> parseSnippet(String input) { ArrayList<NewConnectionSnippetParts> parts = new ArrayList<NewConnectionSnippetParts>(); RegExp regExp = RegExp.compile(pattern_, "g"); for (MatchResult matcher = regExp.exec(input); matcher != null; matcher = regExp.exec(input)) { if (matcher.getGroupCount() >= 2) { int order = 0; try { order = Integer.parseInt(matcher.getGroup(1)); } catch (NumberFormatException e) { } String key = matcher.getGroup(2); String value = matcher.getGroupCount() >= 4 ? matcher.getGroup(4) : null; String connStringField = matcher.getGroupCount() >= 6 ? matcher.getGroup(6) : null; if (value != null) { value = value.replaceAll("\\$colon\\$", ":"); value = value.replaceAll("\\$equal\\$", "="); } parts.add(new NewConnectionSnippetParts(order, key, value, connStringField)); } } Collections.sort(parts, new Comparator<NewConnectionSnippetParts>() { @Override public int compare(NewConnectionSnippetParts p1, NewConnectionSnippetParts p2) { return p1.getOrder() - p2.getOrder(); } }); return parts; } private static int maxRows_ = 4; private void showSuccess() { VerticalPanel verticalPanel = new VerticalPanel(); verticalPanel.addStyleName(RES.styles().dialogMessagePanel()); HTML msg = new HTML( "<b>Success!</b> The given parameters " + "can be used to connect and disconnect correctly."); verticalPanel.add(msg); MessageDialog dlg = new MessageDialog(MessageDialog.INFO, "Test Results", verticalPanel); dlg.addButton("OK", new Operation() { @Override public void execute() { } }, true, false); dlg.showModal(); } private void showFailure(String error) { VerticalPanel verticalPanel = new VerticalPanel(); verticalPanel.addStyleName(RES.styles().dialogMessagePanel()); SafeHtmlBuilder safeHtmlBuilder = new SafeHtmlBuilder(); safeHtmlBuilder.appendHtmlConstant("<b>Failure.</b> "); safeHtmlBuilder.appendEscaped(error); verticalPanel.add(new HTML(safeHtmlBuilder.toSafeHtml())); MessageDialog dlg = new MessageDialog(MessageDialog.ERROR, "Test Results", verticalPanel); dlg.addButton("OK", new Operation() { @Override public void execute() { } }, true, false); dlg.showModal(); } private Grid createParameterizedUI(final NewConnectionInfo info) { final ArrayList<NewConnectionSnippetParts> snippetParts = parseSnippet(info.getSnippet()); int visibleRows = snippetParts.size(); int visibleParams = Math.min(visibleRows, maxRows_); // If we have a field that shares the first row, usually port: boolean hasSecondaryHeaderField = false; if (visibleParams >= 2 && snippetParts.get(0).getOrder() == snippetParts.get(1).getOrder()) { visibleRows--; visibleParams++; hasSecondaryHeaderField = true; } boolean showAdvancedButton = visibleRows > maxRows_; visibleRows = Math.min(visibleRows, maxRows_); final ArrayList<NewConnectionSnippetParts> secondarySnippetParts = new ArrayList<NewConnectionSnippetParts>( snippetParts.subList(visibleParams, snippetParts.size())); final Grid connGrid = new Grid(visibleRows + 1, 4); connGrid.addStyleName(RES.styles().grid()); connGrid.getCellFormatter().setWidth(0, 0, "150px"); connGrid.getCellFormatter().setWidth(0, 1, "180px"); connGrid.getCellFormatter().setWidth(0, 2, "60px"); connGrid.getCellFormatter().setWidth(0, 3, "74px"); for (int idxParams = 0, idxRow = 0; idxRow < visibleRows; idxParams++, idxRow++) { connGrid.getRowFormatter().setStyleName(idxRow, RES.styles().gridRow()); final String key = snippetParts.get(idxParams).getKey(); Label label = new Label(key + ":"); label.addStyleName(RES.styles().label()); connGrid.setWidget(idxRow, 0, label); connGrid.getRowFormatter().setVerticalAlign(idxRow, HasVerticalAlignment.ALIGN_TOP); String textboxStyle = RES.styles().textbox(); if (idxRow == 0 && hasSecondaryHeaderField) { textboxStyle = RES.styles().firstTextbox(); } else { connGrid.getCellFormatter().getElement(idxRow, 1).setAttribute("colspan", "4"); } final TextBoxBase textboxBase; if (visibleRows == 1) { TextArea textarea = new TextArea(); textarea.setVisibleLines(7); textarea.addStyleName(RES.styles().textarea()); textarea.setText(snippetParts.get(idxParams).getValue()); connGrid.setWidget(idxRow, 1, textarea); textboxBase = textarea; } else { TextBox textbox = new TextBox(); textbox.setText(snippetParts.get(idxParams).getValue()); textbox.addStyleName(textboxStyle); textboxBase = textbox; } connGrid.setWidget(idxRow, 1, textboxBase); textboxBase.addChangeHandler(new ChangeHandler() { @Override public void onChange(ChangeEvent arg0) { partsKeyValues_.put(key, textboxBase.getValue()); updateCodePanel(); } }); if (idxRow == 0 && hasSecondaryHeaderField) { idxParams++; final String secondKey = snippetParts.get(idxParams).getKey(); Label secondLabel = new Label(secondKey + ":"); secondLabel.addStyleName(RES.styles().secondLabel()); connGrid.setWidget(idxRow, 2, secondLabel); connGrid.getRowFormatter().setVerticalAlign(idxRow, HasVerticalAlignment.ALIGN_TOP); final TextBox secondTextbox = new TextBox(); secondTextbox.setText(snippetParts.get(idxParams).getValue()); secondTextbox.addStyleName(RES.styles().secondTextbox()); connGrid.setWidget(idxRow, 3, secondTextbox); connGrid.getCellFormatter().getElement(idxRow, 3).setAttribute("colspan", "2"); secondTextbox.addChangeHandler(new ChangeHandler() { @Override public void onChange(ChangeEvent arg0) { partsKeyValues_.put(secondKey, secondTextbox.getValue()); updateCodePanel(); } }); } } HorizontalPanel buttonsPanel = new HorizontalPanel(); buttonsPanel.addStyleName(RES.styles().buttonsPanel()); final ThemedButton testButton = new ThemedButton("Test"); testButton.addClickHandler(new ClickHandler() { public void onClick(ClickEvent event) { testButton.setEnabled(false); server_.connectionTest(codePanel_.getCode(), new DelayedProgressRequestCallback<String>("Testing Connection...") { @Override protected void onSuccess(String error) { testButton.setEnabled(true); if (StringUtil.isNullOrEmpty(error)) { showSuccess(); } else { showFailure(error); } } @Override public void onError(ServerError error) { testButton.setEnabled(true); } }); } }); buttonsPanel.add(testButton); if (showAdvancedButton) { ThemedButton optionsButton = new ThemedButton("Advanced Options...", new ClickHandler() { public void onClick(ClickEvent event) { new NewConnectionSnippetDialog(new OperationWithInput<HashMap<String, String>>() { @Override public void execute(final HashMap<String, String> result) { for (String key : result.keySet()) { partsKeyValues_.put(key, result.get(key)); } updateCodePanel(); } }, secondarySnippetParts, info).showModal(); } }); buttonsPanel.add(optionsButton); } connGrid.getRowFormatter().setStyleName(visibleRows, RES.styles().lastRow()); connGrid.getCellFormatter().getElement(visibleRows, 1).setAttribute("colspan", "4"); connGrid.setWidget(visibleRows, 1, buttonsPanel); return connGrid; } private void updateCodePanel() { String input = info_.getSnippet(); RegExp regExp = RegExp.compile(pattern_, "g"); StringBuilder builder = new StringBuilder(); int inputIndex = 0; for (MatchResult matcher = regExp.exec(input); matcher != null; matcher = regExp.exec(input)) { if (matcher.getGroupCount() >= 2) { String key = matcher.getGroup(2); String value = matcher.getGroupCount() >= 4 ? matcher.getGroup(4) : null; String connStringField = matcher.getGroupCount() >= 6 ? matcher.getGroup(6) : null; if (value != null) { value = value.replaceAll("\\$colon\\$", ":"); value = value.replaceAll("\\$equal\\$", "="); } builder.append(input.substring(inputIndex, matcher.getIndex())); if (partsKeyValues_.containsKey(key)) { value = partsKeyValues_.get(key); } if (value != null) { if (connStringField != null) { builder.append(connStringField); builder.append("="); } builder.append(value); if (connStringField != null) { builder.append(";"); } } inputIndex = matcher.getIndex() + matcher.getGroup(0).length(); } } builder.append(input.substring(inputIndex, input.length())); codePanel_.setCode(builder.toString(), ""); } private Widget createWidget() { VerticalPanel container = new VerticalPanel(); parametersPanel_ = new VerticalPanel(); parametersPanel_.addStyleName(RES.styles().parametersPanel()); container.add(parametersPanel_); // add the code panel codePanel_ = new ConnectionCodePanel(); codePanel_.addStyleName(RES.styles().dialogCodePanel()); Grid codeGrid = new Grid(1, 1); codeGrid.addStyleName(RES.styles().codeGrid()); codeGrid.setCellPadding(0); codeGrid.setCellSpacing(0); codeGrid.setWidget(0, 0, codePanel_); container.add(codeGrid); return container; } public ConnectionOptions collectInput() { // collect the result ConnectionOptions result = ConnectionOptions.create(codePanel_.getCode(), codePanel_.getConnectVia()); // return result return result; } public interface Styles extends CssResource { String helpLink(); String codeGrid(); String dialogCodePanel(); String grid(); String gridRow(); String label(); String textbox(); String textarea(); String parametersPanel(); String firstTextbox(); String secondLabel(); String secondTextbox(); String buttonTextbox(); String settingsButton(); String lastRow(); String buttonsPanel(); String dialogMessagePanel(); } public interface Resources extends ClientBundle { @Source("NewConnectionSnippetHost.css") Styles styles(); } public static Resources RES = GWT.create(Resources.class); public static void ensureStylesInjected() { RES.styles().ensureInjected(); } private ConnectionCodePanel codePanel_; private VerticalPanel parametersPanel_; @SuppressWarnings("unused") private NewConnectionSnippetHostResources newConnectionSnippetHostResources_; NewConnectionInfo info_; ArrayList<NewConnectionSnippetParts> snippetParts_; HashMap<String, String> partsKeyValues_ = new HashMap<String, String>(); static final String pattern_ = "\\$\\{([0-9]+):([^:=}]+)(=([^:}]*))?(:([^}]+))?\\}"; private ConnectionsServerOperations server_; }