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1
4 package org.oddjob.designer.actions;
5
6 import java.awt.datatransfer.DataFlavor  ;
7 import java.awt.datatransfer.StringSelection ;
8 import java.awt.datatransfer.Transferable ;
9 import java.io.Reader ;
10 import java.util.ArrayList ;
11 import java.util.Arrays ;
12 import java.util.List ;
13
14 import javax.swing.JComponent ;
15 import javax.swing.JOptionPane ;
16 import javax.swing.TransferHandler ;
17
18 import org.apache.log4j.Logger;
19 import org.oddjob.OddjobException;
20 import org.oddjob.designer.DesignerXMLParser;
21 import org.oddjob.designer.model.ComponentAction;
22 import org.oddjob.designer.model.DesignComponent;
23 import org.oddjob.designer.model.DesignTreeNode;
24 import org.oddjob.designer.model.DesignerModel;
25 import org.oddjob.designer.model.InsertableDesignComponent;
26 import org.oddjob.designer.model.StructuralDesignComponent;
27 import org.oddjob.designer.view.RadioActions;
28 import org.oddjob.designer.view.ViewHelper;
29
30
34 public class DCTransferHandler extends TransferHandler {
35 private static final Logger logger = Logger.getLogger(DCTransferHandler.class);
36
37
38 private final DesignerModel model;
39
40
41 private DesignTreeNode sourceNode;
42
43
48 public DCTransferHandler(DesignerModel model) {
49 this.model = model;
50 }
51
52
55 public boolean canImport(JComponent comp, DataFlavor [] transferFlavors) {
56 return selectBestFlavor(transferFlavors) != null;
57 }
58
59
62 public boolean importData(JComponent comp, Transferable t) {
63 DataFlavor [] dfs = t.getTransferDataFlavors();
64 DataFlavor df = selectBestFlavor(dfs);
65 String xml = null;
66 try {
67 Reader reader = df.getReaderForText(t);
68 StringBuffer b = new StringBuffer ();
69 char[] ca = new char[1024];
70 while (true) {
71 int i = reader.read(ca);
72 if (i < 0) {
73 break;
74 }
75 b.append(ca, 0, i);
76 }
77 xml = b.toString();
78 }catch (Exception e) {
79 logger.error("Failed data transfer.", e);
80 return false;
81 }
82 logger.debug(xml);
83
84 if (model.getCurrentComponent() == null) {
85 return false;
86 }
87 ComponentAction[] actions = getActions(model.getCurrentSelection(), xml);
88 if (actions.length == 0) {
89 JOptionPane.showMessageDialog(comp,
90 "Sorry - can't insert/add child at selected node.",
91 "Information",
92 JOptionPane.INFORMATION_MESSAGE);
93 return false;
94 }
95
96 return RadioActions.showDialog(comp,
97 ViewHelper.convertAll(actions));
98 }
99
100
103 public int getSourceActions(JComponent c) {
104 if (model.getCurrentSelection() == null) {
105 return NONE;
106 }
107 return COPY_OR_MOVE;
108 }
109
110
113 protected Transferable createTransferable(JComponent c) {
114 String xml = model.getCurrentXML();
115 if (xml == null) {
116 return null;
117 }
118 sourceNode = model.getCurrentSelection();
119 logger.debug("Exporting:\n" + xml);
120 return new StringSelection (xml);
121 }
122
123
126 protected void exportDone(JComponent source, Transferable data, int action) {
127 if (action == MOVE) {
128 model.delete(sourceNode);
129 }
130 }
131
132
139 static DataFlavor selectBestFlavor(DataFlavor [] dataFlavors) {
140 for (int i = 0; i < dataFlavors.length; ++i) {
141 DataFlavor df = dataFlavors[i];
142 if ("text".equals(df.getPrimaryType()) &&
143 "plain".equals(df.getSubType())) {
144 return df;
145 }
146 }
147 return null;
148 }
149
150
159 static ComponentAction[] getActions(final DesignTreeNode node, final String xml) {
160 List actions = new ArrayList ();
161 final DesignComponent parentComponent = DesignerModel.getParentComponent(node);
162 if ( parentComponent != null && parentComponent instanceof InsertableDesignComponent) {
163 actions.add(new ComponentAction() {
164 public String getName() {
165 return "Insert";
166 }
167
170 public void perform() {
171 DesignComponent child = null;
172 try {
173 child = DesignerXMLParser.buildComponent(xml);
174 } catch (Exception e) {
175 throw new OddjobException("Failed to transfer data [" + xml
176 + "] (" + e.getMessage() + ")", e);
177 }
178 InsertableDesignComponent idc = (InsertableDesignComponent)
179 parentComponent;
180 idc.insertChild(DesignerModel.getIndex(node), child);
181
182 }
183 });
184 }
185 if (node.getDesignComponent() instanceof StructuralDesignComponent) {
186 StructuralDesignComponent sdc = (StructuralDesignComponent)node.getDesignComponent();
187 ComponentAction[] tas = sdc.transferActions(xml);
188 actions.addAll(Arrays.asList(tas));
189 }
190 return (ComponentAction[]) actions.toArray(new ComponentAction[0]);
191 }
192 }
193 |
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