| 1 | /******************************************************************************* |
|---|---|
| 2 | * Copyright (c) 2000, 2015 IBM Corporation and others. |
| 3 | * |
| 4 | * This program and the accompanying materials |
| 5 | * are made available under the terms of the Eclipse Public License 2.0 |
| 6 | * which accompanies this distribution, and is available at |
| 7 | * https://www.eclipse.org/legal/epl-2.0/ |
| 8 | * |
| 9 | * SPDX-License-Identifier: EPL-2.0 |
| 10 | * |
| 11 | * Contributors: |
| 12 | * IBM Corporation - initial API and implementation |
| 13 | *******************************************************************************/ |
| 14 | package org.eclipse.jdt.astview.views; |
| 15 | |
| 16 | import java.util.ArrayList; |
| 17 | import java.util.HashMap; |
| 18 | import java.util.List; |
| 19 | |
| 20 | import org.eclipse.swt.dnd.Clipboard; |
| 21 | import org.eclipse.swt.dnd.TextTransfer; |
| 22 | import org.eclipse.swt.dnd.Transfer; |
| 23 | import org.eclipse.swt.widgets.Tree; |
| 24 | import org.eclipse.swt.widgets.TreeItem; |
| 25 | |
| 26 | import org.eclipse.jface.action.Action; |
| 27 | |
| 28 | import org.eclipse.ui.ISharedImages; |
| 29 | import org.eclipse.ui.IWorkbenchCommandConstants; |
| 30 | import org.eclipse.ui.PlatformUI; |
| 31 | import org.eclipse.ui.actions.ActionFactory; |
| 32 | |
| 33 | |
| 34 | public class TreeCopyAction extends Action { |
| 35 | |
| 36 | private static class TreeObject { |
| 37 | private final TreeItem fTreeItem; |
| 38 | private boolean fSelected; |
| 39 | private final List<TreeObject> fChildren; |
| 40 | public TreeObject(TreeItem element, boolean selected) { |
| 41 | fTreeItem= element; |
| 42 | fSelected= selected; |
| 43 | fChildren= new ArrayList<>(); |
| 44 | } |
| 45 | public void setSelected() { |
| 46 | fSelected= true; |
| 47 | } |
| 48 | public void addChild(TreeObject child) { |
| 49 | fChildren.add(child); |
| 50 | } |
| 51 | public boolean isSelected() { |
| 52 | return fSelected; |
| 53 | } |
| 54 | public TreeItem getTreeItem() { |
| 55 | return fTreeItem; |
| 56 | } |
| 57 | public List<TreeObject> getChildren() { |
| 58 | return fChildren; |
| 59 | } |
| 60 | @Override |
| 61 | public String toString() { |
| 62 | StringBuilder buf= new StringBuilder(); |
| 63 | if (fSelected) |
| 64 | buf.append("* "); //$NON-NLS-1$ |
| 65 | buf.append(trim(fTreeItem.getText())).append(" ["); //$NON-NLS-1$ |
| 66 | for (int i= 0; i < fChildren.size(); i++) { |
| 67 | TreeObject child= fChildren.get(i); |
| 68 | buf.append(trim(child.getTreeItem().getText())); |
| 69 | if (i > 0) |
| 70 | buf.append(", "); //$NON-NLS-1$ |
| 71 | } |
| 72 | return buf.append("]").toString(); //$NON-NLS-1$ |
| 73 | } |
| 74 | private String trim(String string) { |
| 75 | if (string.length() > 60) |
| 76 | return string.substring(0, 60) + "..."; //$NON-NLS-1$ |
| 77 | else |
| 78 | return string; |
| 79 | } |
| 80 | } |
| 81 | |
| 82 | private final Tree[] fTrees; |
| 83 | |
| 84 | public TreeCopyAction(Tree[] trees) { |
| 85 | fTrees= trees; |
| 86 | setText("&Copy"); //$NON-NLS-1$ |
| 87 | setToolTipText("Copy to Clipboard"); //$NON-NLS-1$ |
| 88 | setEnabled(false); |
| 89 | setImageDescriptor(PlatformUI.getWorkbench().getSharedImages().getImageDescriptor(ISharedImages.IMG_TOOL_COPY)); |
| 90 | setId(ActionFactory.COPY.getId()); |
| 91 | setActionDefinitionId(IWorkbenchCommandConstants.EDIT_COPY); |
| 92 | } |
| 93 | |
| 94 | @Override |
| 95 | public void run() { |
| 96 | Tree tree= null; |
| 97 | for (Tree t : fTrees) { |
| 98 | if (t.isFocusControl()) { |
| 99 | tree= t; |
| 100 | break; |
| 101 | } |
| 102 | } |
| 103 | if (tree == null) |
| 104 | return; |
| 105 | |
| 106 | TreeItem[] selection= tree.getSelection(); |
| 107 | if (selection.length == 0) |
| 108 | return; |
| 109 | |
| 110 | Clipboard clipboard= null; |
| 111 | try { |
| 112 | clipboard= new Clipboard(tree.getDisplay()); |
| 113 | if (selection.length == 1) { |
| 114 | clipboard.setContents(new Object[]{selection[0].getText()}, new Transfer[]{TextTransfer.getInstance()}); |
| 115 | } else if (selection.length > 1) { |
| 116 | copyTree(selection, clipboard); |
| 117 | } |
| 118 | } finally { |
| 119 | if (clipboard != null) |
| 120 | clipboard.dispose(); |
| 121 | } |
| 122 | } |
| 123 | |
| 124 | private void copyTree(TreeItem[] selection, Clipboard clipboard) { |
| 125 | HashMap<TreeItem, TreeObject> elementToTreeObj= new HashMap<>(); |
| 126 | List<TreeObject> roots= new ArrayList<>(); |
| 127 | int indent= Integer.MIN_VALUE; |
| 128 | |
| 129 | for (TreeItem item : selection) { |
| 130 | TreeObject treeObj= elementToTreeObj.get(item); |
| 131 | if (treeObj == null) { |
| 132 | treeObj= new TreeObject(item, true); |
| 133 | elementToTreeObj.put(item, treeObj); |
| 134 | } else { |
| 135 | treeObj.setSelected(); |
| 136 | continue; |
| 137 | } |
| 138 | // walk up to roots: |
| 139 | int level= 0; |
| 140 | item= item.getParentItem(); |
| 141 | while (item != null) { |
| 142 | TreeObject parentTreeObj= elementToTreeObj.get(item); |
| 143 | if (parentTreeObj == null) { |
| 144 | parentTreeObj= new TreeObject(item, false); |
| 145 | elementToTreeObj.put(item, parentTreeObj); |
| 146 | parentTreeObj.addChild(treeObj); |
| 147 | treeObj= parentTreeObj; |
| 148 | item= item.getParentItem(); |
| 149 | level--; |
| 150 | } else { |
| 151 | parentTreeObj.addChild(treeObj); |
| 152 | treeObj= parentTreeObj; |
| 153 | break; |
| 154 | } |
| 155 | } |
| 156 | if (item == null) { |
| 157 | roots.add(treeObj); |
| 158 | indent= Math.max(indent, level); |
| 159 | } |
| 160 | } |
| 161 | elementToTreeObj= null; |
| 162 | StringBuffer buf= new StringBuffer(); |
| 163 | appendSelectionObjects(buf, indent, roots); |
| 164 | String result= buf.length() > 0 ? buf.substring(1) : buf.toString(); |
| 165 | clipboard.setContents(new Object[] { result }, new Transfer[] { TextTransfer.getInstance() }); |
| 166 | } |
| 167 | |
| 168 | private void appendSelectionObjects(StringBuffer buffer, int indent, List<TreeObject> selObjs) { |
| 169 | for (TreeObject selObj : selObjs) { |
| 170 | if (selObj.isSelected()) { |
| 171 | buffer.append('\n'); |
| 172 | for (int d= 0; d < indent; d++) |
| 173 | buffer.append('\t'); |
| 174 | buffer.append(selObj.getTreeItem().getText()); |
| 175 | } |
| 176 | appendSelectionObjects(buffer, indent + 1, selObj.getChildren()); |
| 177 | } |
| 178 | } |
| 179 | } |
| 180 |
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