Java tutorial
/******************************************************************************* * Copyright (c) 2012 Wind River Systems, Inc. and others. All rights reserved. * This program and the accompanying materials are made available under the terms * of the Eclipse Public License v1.0 which accompanies this distribution, and is * available at http://www.eclipse.org/legal/epl-v10.html * * Contributors: * Wind River Systems - initial API and implementation *******************************************************************************/ package org.eclipse.tcf.internal.cdt.ui.breakpoints; import java.util.HashMap; import java.util.Map; import org.eclipse.jface.viewers.ArrayContentProvider; import org.eclipse.jface.viewers.CellEditor; import org.eclipse.jface.viewers.ColumnViewer; import org.eclipse.jface.viewers.ColumnWeightData; import org.eclipse.jface.viewers.EditingSupport; import org.eclipse.jface.viewers.ITableLabelProvider; import org.eclipse.jface.viewers.LabelProvider; import org.eclipse.jface.viewers.TableLayout; import org.eclipse.jface.viewers.TableViewer; import org.eclipse.jface.viewers.TableViewerColumn; import org.eclipse.jface.viewers.TextCellEditor; import org.eclipse.jface.viewers.Viewer; import org.eclipse.jface.viewers.ViewerComparator; import org.eclipse.swt.SWT; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Shell; import org.eclipse.swt.widgets.Table; import org.eclipse.ui.dialogs.SelectionDialog; public class TCFContextQueryExpressionDialog extends SelectionDialog { private final String[] attributes; private String expression_text; private int expression_parent; private final Map<String, String> expression_attrs = new HashMap<String, String>(); private final String[] column_names = new String[] { "Parameter", "Value" }; private int pos; private int len; protected TCFContextQueryExpressionDialog(Shell parentShell, String[] attributes, String expression) { super(parentShell); setShellStyle(getShellStyle() | SWT.RESIZE); this.attributes = attributes; expression_text = expression; len = expression.length(); parseExpression(); } private void parseExpression() { if (pos < len && expression_text.charAt(pos) == '/') { pos++; expression_parent = pos; expression_attrs.clear(); } while (pos < len) { parseExpressionPart(); if (pos >= len) break; char ch = expression_text.charAt(pos); if (ch == '/') { pos++; expression_parent = pos; expression_attrs.clear(); } else { // Syntax error break; } } } private void parseExpressionPart() { while (pos < len) { String name = parseString(); if (pos < len && expression_text.charAt(pos) == '=') { pos++; String value = parseString(); expression_attrs.put(name, value); } if (pos < len && expression_text.charAt(pos) == ',') { pos++; } else { break; } } } private String parseString() { StringBuffer bf = new StringBuffer(); if (pos < len && expression_text.charAt(pos) == '"') { pos++; while (pos < len) { char ch = expression_text.charAt(pos++); if (ch == '"') break; if (ch == '\\' && pos < len) { ch = expression_text.charAt(pos++); } bf.append(ch); } } else { while (pos < len) { char ch = expression_text.charAt(pos); if (ch == '=' || ch == '/' || ch == ',') break; bf.append(ch); pos++; } } return bf.toString(); } private final class ParameterTableLabelProvider extends LabelProvider implements ITableLabelProvider { public Image getColumnImage(Object element, int columnIndex) { return null; } public String getColumnText(Object element, int column) { if (column == 0) return (String) element; return expression_attrs.get((String) element); } } public final class ExpressionEditingSupport extends EditingSupport { private TextCellEditor editor; private ColumnViewer viewer; private ExpressionEditingSupport(ColumnViewer viewer) { super(viewer); this.viewer = viewer; editor = new TextCellEditor((Composite) getViewer().getControl(), SWT.NONE); } @Override protected CellEditor getCellEditor(Object element) { return editor; } @Override protected boolean canEdit(Object element) { return true; } @Override protected Object getValue(Object element) { String value = expression_attrs.get((String) element); if (value == null) value = ""; return value; } @Override protected void setValue(Object element, Object value) { String name = (String) element; String str = (String) value; if (str == null || str.length() == 0) { expression_attrs.remove(name); } else { expression_attrs.put(name, str); } viewer.update(element, null); } } @Override protected Control createDialogArea(Composite parent) { Composite page = new Composite(parent, SWT.NONE); GridLayout gridLayout = new GridLayout(1, true); page.setLayout(gridLayout); page.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true)); TableLayout tableLayout = new TableLayout(); tableLayout.addColumnData(new ColumnWeightData(1)); tableLayout.addColumnData(new ColumnWeightData(1)); Table table = new Table(parent, SWT.BORDER | SWT.FULL_SELECTION | SWT.V_SCROLL); table.setLinesVisible(true); table.setHeaderVisible(true); table.setLayout(tableLayout); TableViewer tableViewer = new TableViewer(table); tableViewer.getControl().setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true)); Control cntrl = tableViewer.getControl(); cntrl.setLayoutData(new GridData(GridData.FILL_HORIZONTAL)); TableViewerColumn labelColumn = new TableViewerColumn(tableViewer, SWT.NONE); labelColumn.getColumn().setText(column_names[0]); TableViewerColumn valueColumn = new TableViewerColumn(tableViewer, SWT.Modify); valueColumn.getColumn().setText(column_names[1]); tableViewer.setContentProvider(new ArrayContentProvider()); tableViewer.setLabelProvider(new ParameterTableLabelProvider()); valueColumn.setEditingSupport(new ExpressionEditingSupport(valueColumn.getViewer())); tableViewer.setInput(attributes); tableViewer.setComparator(new ViewerComparator() { @Override public int compare(Viewer viewer, Object e1, Object e2) { String t1 = (String) e1; String t2 = (String) e2; return t1.compareTo(t2); }; }); return parent; } private void appendString(StringBuffer bf, String s) { int l = s.length(); boolean q = false; for (int i = 0; !q && i < l; i++) { char ch = s.charAt(i); q = !Character.isDigit(ch) && !Character.isLetter(ch); } if (!q) { bf.append(s); return; } bf.append('"'); for (int i = 0; i < l; i++) { char ch = s.charAt(i); if (ch == '\\' || ch == '"') bf.append('\\'); bf.append(ch); } bf.append('"'); } public String getExpression() { StringBuffer bf = new StringBuffer(); for (String name : attributes) { String value = expression_attrs.get(name); if (value != null && value.length() > 0) { if (bf.length() > 0) bf.append(','); appendString(bf, name); bf.append('='); appendString(bf, value); } } return expression_text.substring(0, expression_parent) + bf.toString(); } @Override protected void configureShell(Shell shell) { super.configureShell(shell); shell.setText("Select Expression Parameters"); } }