Java tutorial
/* * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You 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 org.apache.sling.ide.eclipse.ui.actions; import java.util.Collection; import java.util.Collections; import java.util.LinkedList; import javax.jcr.nodetype.NodeDefinition; import javax.jcr.nodetype.NodeType; import org.apache.sling.ide.eclipse.ui.nav.model.JcrNode; import org.apache.sling.ide.transport.NodeTypeRegistry; import org.apache.sling.ide.transport.RepositoryException; import org.eclipse.jface.dialogs.IDialogConstants; import org.eclipse.jface.dialogs.InputDialog; import org.eclipse.jface.fieldassist.ComboContentAdapter; import org.eclipse.jface.fieldassist.ContentProposalAdapter; import org.eclipse.jface.fieldassist.SimpleContentProposalProvider; import org.eclipse.swt.SWT; import org.eclipse.swt.events.ModifyEvent; import org.eclipse.swt.events.ModifyListener; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.graphics.Point; import org.eclipse.swt.graphics.Rectangle; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.widgets.Combo; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Shell; public class NewNodeDialog extends InputDialog { private static String lastChosenNodeType = null; private final String parentNodeType; private final NodeTypeRegistry ntManager; protected String comboSelection; private Collection<String> allowedChildren; private Combo combo; private ContentProposalAdapter proposalAdapter; private NodeDefinition[] allChildNodeDefs; public NewNodeDialog(Shell parentShell, JcrNode node, NodeTypeRegistry ntManager) throws RepositoryException { super(parentShell, "Enter Node Name", "Enter name for new node under:\n path: " + node.getJcrPath(), "", null); this.parentNodeType = node.getPrimaryType(); this.ntManager = ntManager; if (ntManager != null) { final LinkedList<String> ac = new LinkedList<>( ntManager.getAllowedPrimaryChildNodeTypes(parentNodeType)); final NodeType parentNt = ntManager.getNodeType(parentNodeType); allChildNodeDefs = parentNt.getChildNodeDefinitions(); Collections.sort(ac); this.allowedChildren = ac; } } @Override protected Control createDialogArea(Composite parent) { Composite composite = (Composite) super.createDialogArea(parent); Control[] children = composite.getChildren(); Control errorMessageText = children[children.length - 1]; GridData errorMessageGridData = new GridData(GridData.GRAB_HORIZONTAL | GridData.HORIZONTAL_ALIGN_FILL); errorMessageGridData.heightHint = convertHeightInCharsToPixels(2); errorMessageText.setLayoutData(errorMessageGridData); // now add the node type dropbox-combo Label label = new Label(composite, SWT.WRAP); label.moveAbove(errorMessageText); label.setText("Define node type"); GridData data = new GridData(GridData.GRAB_HORIZONTAL | GridData.GRAB_VERTICAL | GridData.HORIZONTAL_ALIGN_FILL | GridData.VERTICAL_ALIGN_CENTER); data.widthHint = convertHorizontalDLUsToPixels(IDialogConstants.MINIMUM_MESSAGE_AREA_WIDTH); label.setLayoutData(data); label.setFont(parent.getFont()); combo = new Combo(composite, SWT.DROP_DOWN); combo.moveAbove(errorMessageText); if (allowedChildren != null) { combo.setItems(allowedChildren.toArray(new String[0])); } combo.setLayoutData(new GridData(GridData.GRAB_HORIZONTAL | GridData.HORIZONTAL_ALIGN_FILL)); combo.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { comboSelection = combo.getText(); validateInput(); } }); combo.addModifyListener(new ModifyListener() { @Override public void modifyText(ModifyEvent e) { comboSelection = combo.getText(); validateInput(); } }); SimpleContentProposalProvider proposalProvider = new SimpleContentProposalProvider(combo.getItems()); proposalProvider.setFiltering(true); final ComboContentAdapter controlContentAdapter = new ComboContentAdapter() { @Override public void insertControlContents(Control control, String text, int cursorPosition) { Point selection = combo.getSelection(); combo.setText(text); selection.x = selection.x + cursorPosition; selection.y = selection.x; combo.setSelection(selection); } @Override public Rectangle getInsertionBounds(Control control) { final Rectangle insertionBounds = super.getInsertionBounds(control); // always insert at start insertionBounds.x = 0; insertionBounds.y = 0; return insertionBounds; } }; // this variant opens auto-complete on each character proposalAdapter = new ContentProposalAdapter(combo, controlContentAdapter, proposalProvider, null, null); // this variant opens auto-complete only when invoking the auto-complete hotkey if (allowedChildren != null && allowedChildren.size() == 1) { combo.setText(allowedChildren.iterator().next()); } else if (allowedChildren != null) { if (allowedChildren.contains(lastChosenNodeType)) { combo.setText(lastChosenNodeType); } } return composite; } @Override protected void initializeBounds() { super.initializeBounds(); // fix autocomplete popup size: Point size = combo.getSize(); size.x /= 2; size.y = 180; proposalAdapter.setPopupSize(size); } public String getChosenNodeType() { lastChosenNodeType = comboSelection; return comboSelection; } protected void validateInput() { final String firstInput = getText().getText(); final String secondInput = comboSelection; try { if (secondInput == null || secondInput.length() == 0) { setErrorMessage(""); } else if (ntManager == null) { setErrorMessage(null); } else if (ntManager.isAllowedPrimaryChildNodeType(parentNodeType, secondInput)) { // also check on the name, not only the type if (allChildNodeDefs == null) { setErrorMessage("No child node definitions found for " + parentNodeType); } else { boolean success = false; for (int i = 0; i < allChildNodeDefs.length; i++) { NodeDefinition aChildNodeDef = allChildNodeDefs[i]; if (aChildNodeDef.getName() != null && aChildNodeDef.getName().length() > 0) { if (firstInput.equals(aChildNodeDef.getName())) { setErrorMessage(null); return; } } else { // mark success if there's a child node definition without a name // (ie then it can be any name) success = true; } } if (success) { setErrorMessage(null); return; } StringBuffer details = new StringBuffer(); for (NodeDefinition aChildNodeDef : allChildNodeDefs) { if (details.length() != 0) { details.append(", "); } details.append("(name=" + aChildNodeDef.getName() + ", required primary type(s)="); String[] requiredPrimaryTypeNames = aChildNodeDef.getRequiredPrimaryTypeNames(); if (requiredPrimaryTypeNames == null) { details.append("null"); } else { for (int j = 0; j < requiredPrimaryTypeNames.length; j++) { String rptn = requiredPrimaryTypeNames[j]; if (j > 0) { details.append(","); } details.append(rptn); } } details.append(")"); } setErrorMessage("No matching child node definition found for " + parentNodeType + ". Expected one of: " + details); } } else { setErrorMessage("Error: Invalid child node type of " + parentNodeType); } } catch (RepositoryException e) { setErrorMessage("RepositoryException: " + e); } }; }