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1
11 package org.eclipse.pde.internal.ui.commands;
12
13 import java.util.ArrayList  ;
14
15 import org.eclipse.core.commands.Command;
16 import org.eclipse.core.commands.IParameter;
17 import org.eclipse.core.commands.ParameterType;
18 import org.eclipse.core.commands.common.CommandException;
19 import org.eclipse.jface.viewers.ISelection;
20 import org.eclipse.jface.viewers.IStructuredSelection;
21 import org.eclipse.swt.SWT;
22 import org.eclipse.swt.events.DisposeEvent;
23 import org.eclipse.swt.events.DisposeListener;
24 import org.eclipse.swt.layout.GridData;
25 import org.eclipse.swt.layout.GridLayout;
26 import org.eclipse.swt.widgets.Composite;
27 import org.eclipse.swt.widgets.Group;
28 import org.eclipse.swt.widgets.Label;
29 import org.eclipse.ui.ISelectionListener;
30 import org.eclipse.ui.ISelectionService;
31 import org.eclipse.ui.IWorkbenchPart;
32 import org.eclipse.ui.IWorkbenchWindow;
33 import org.eclipse.ui.PlatformUI;
34
35 public class QueryByObjectSelection extends QueryControl {
36
37 private Label fObjectSelectionLabel;
38 private Label fLabel;
39 private SelectionTracker fSelectionTracker;
40 private Object fObjectSelection;
41
42 public QueryByObjectSelection(CommandComposerPart csp, Composite comp) {
43 super(csp, comp);
44 }
45
46
47 protected void createGroupContents(Group parent) {
48 Composite comp = fToolkit.createComposite(parent);
49 GridLayout layout = new GridLayout(2, false);
50 layout.marginHeight = layout.marginWidth = 0;
51 comp.setLayout(layout);
52 comp.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
53 fLabel = fToolkit.createLabel(comp, "selection: "); fObjectSelectionLabel = fToolkit.createLabel(comp, "<no selection>", SWT.BORDER); fObjectSelectionLabel.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
56
57 IWorkbenchWindow activeWindow = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
58 if (activeWindow != null) {
59 ISelectionService selectionService = activeWindow.getSelectionService();
60 if (selectionService != null) {
61 fSelectionTracker = new SelectionTracker(selectionService);
62 }
63 }
64
65 parent.addDisposeListener(new DisposeListener() {
66 public void widgetDisposed(DisposeEvent e) {
67 if (fSelectionTracker != null) {
68 fSelectionTracker.dispose();
69 }
70 }
71 });
72 }
73
74 protected String getName() {
75 return "Query Commands by selected object"; }
77
78 private class SelectionTracker implements ISelectionListener {
79
80 private final ISelectionService _selectionService;
81
82 public SelectionTracker(ISelectionService selectionService) {
83 _selectionService = selectionService;
84 _selectionService.addSelectionListener(this);
85 }
86
87 public void selectionChanged(IWorkbenchPart part, ISelection selection) {
88 if (selection instanceof IStructuredSelection) {
89 Object selected = ((IStructuredSelection) selection)
90 .getFirstElement();
91
92 if (selected != null) {
93 fObjectSelection = selected;
94 String typeName = selected.getClass().getName();
95 fObjectSelectionLabel.setToolTipText(typeName);
96
97 int dotPosition = typeName.lastIndexOf('.');
98 if (dotPosition != -1) {
99 typeName = typeName.substring(dotPosition+1);
100 }
101 fObjectSelectionLabel.setText(typeName);
102 }
103 }
104 }
105
106 public void dispose() {
107 _selectionService.removeSelectionListener(this);
108 }
109 }
110
111 private boolean hasTypedParameterMatch(Command command, Object object) throws CommandException {
112 IParameter[] params = command.getParameters();
113 if (params != null) {
114 for (int i = 0; i < params.length; i++) {
115 IParameter param = params[i];
116 ParameterType parameterType = command.getParameterType(param.getId());
117 if (parameterType != null) {
118 if (parameterType.isCompatible(object)) return true;
119 }
120 }
121 }
122
123 return false;
124 }
125
126 protected Command[] getCommands() {
127 Object objectSelection = fObjectSelection;
128 if (objectSelection == null)
129 return null;
130
131 ArrayList hitList = new ArrayList ();
132 Command[] commands = getCommandService().getDefinedCommands();
133 for (int i = 0; i < commands.length; i++) {
134 Command command = commands[i];
135 try {
136 if (hasTypedParameterMatch(command, objectSelection))
137 hitList.add(command);
138 }
139 catch (CommandException ex) {
140 }
141 }
142
143 return (Command[]) hitList.toArray(new Command[hitList.size()]);
144 }
145
146 protected void enable(boolean enable) {
147 fGroup.setEnabled(enable);
148 fLabel.setEnabled(enable);
149 fObjectSelectionLabel.setEnabled(enable);
150 }
151 }
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