1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
|
/*******************************************************************************
* Copyright (c) 2010, 2015 Tomasz Wesolowski and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* Tomasz Wesolowski - initial API and implementation
*******************************************************************************/
package org.eclipse.cdt.internal.ui.actions;
import java.util.ResourceBundle;
import org.eclipse.cdt.core.dom.ast.IASTNode;
import org.eclipse.cdt.core.dom.ast.IASTNodeSelector;
import org.eclipse.cdt.core.dom.ast.IASTTranslationUnit;
import org.eclipse.cdt.core.model.ISourceRange;
import org.eclipse.cdt.internal.core.model.ext.SourceRange;
import org.eclipse.cdt.internal.ui.editor.SelectionHistory;
import org.eclipse.ui.texteditor.ITextEditor;
public class StructureSelectPreviousAction extends StructureSelectionAction {
public static final String PREFIX = "StructureSelectPrevious."; //$NON-NLS-1$
public StructureSelectPreviousAction(ResourceBundle bundle, ITextEditor editor, SelectionHistory history) {
super(bundle, PREFIX, editor, history);
}
@Override
public ISourceRange doExpand(IASTTranslationUnit ast, SourceRange current) {
ISourceRange newSourceRange = expandToPrevious(ast, current);
if (newSourceRange == null) {
newSourceRange = StructureSelectEnclosingAction.expandToEnclosing(ast, current);
}
if (newSourceRange != null) {
history.remember(current);
}
return newSourceRange;
}
private ISourceRange expandToPrevious(IASTTranslationUnit ast, SourceRange current) {
IASTNodeSelector selector = ast.getNodeSelector(null);
IASTNode enclosingNode = selector.findEnclosingNode(current.getStartPos(), current.getLength());
if (samePosition(enclosingNode, current)) {
enclosingNode = enclosingNode.getParent();
}
if (enclosingNode == null) {
return null;
}
// Find the first child of enclosingNode containing selection end.
int selectionStart = current.getStartPos();
int firstSelectedChildIndex = -1;
IASTNode[] children = enclosingNode.getChildren();
for (int i = 0; i < children.length; i++) {
IASTNode node = children[i];
if (nodeContains(node, selectionStart)) {
firstSelectedChildIndex = i;
break;
}
}
if (firstSelectedChildIndex > 0) {
IASTNode prevNode = children[firstSelectedChildIndex - 1];
int endingOffset = current.getStartPos() + current.getLength();
return new SourceRange(prevNode.getFileLocation().getNodeOffset(),
endingOffset - prevNode.getFileLocation().getNodeOffset());
}
return null;
}
}
|
