/*
* Copyright (c) 2013, the Dart project authors.
*
* Licensed under the Eclipse Public License v1.0 (the "License"); you may not use this file except
* in compliance with the License. You may obtain a copy of the License at
*
* http://www.eclipse.org/legal/epl-v10.html
*
* Unless required by applicable law or agreed to in writing, software distributed under the License
* is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
* or implied. See the License for the specific language governing permissions and limitations under
* the License.
*/
package com.google.dart.tools.ui.internal.text.editor.selectionactions;
import com.google.dart.engine.ast.AstNode;
import com.google.dart.engine.ast.visitor.GeneralizingAstVisitor;
import com.google.dart.engine.services.util.SelectionAnalyzer;
import com.google.dart.engine.utilities.source.SourceRange;
import com.google.dart.tools.ui.internal.text.DartHelpContextIds;
import com.google.dart.tools.ui.internal.text.editor.DartEditor;
import org.eclipse.ui.PlatformUI;
import java.util.List;
public class StructureSelectNextAction extends StructureSelectionAction {
private static class NextNodeAnalyzer extends GeneralizingAstVisitor<Void> {
public static AstNode perform(int offset, AstNode lastCoveringNode) {
NextNodeAnalyzer analyzer = new NextNodeAnalyzer(offset);
lastCoveringNode.accept(analyzer);
return analyzer.nextNode;
}
private int offset;
private AstNode nextNode;
private NextNodeAnalyzer(int offset) {
super();
this.offset = offset;
}
@Override
public Void visitNode(AstNode node) {
int start = node.getOffset();
int end = start + node.getLength();
if (start == offset) {
nextNode = node;
super.visitNode(node);
} else if (start < offset && offset < end) {
super.visitNode(node);
}
return null;
}
}
private static AstNode getNextNode(AstNode parent, AstNode node) {
List<AstNode> siblingNodes = StructureSelectionAction.getSiblingNodes(node);
if (siblingNodes.size() == 0) {
return parent;
}
if (node == siblingNodes.get(siblingNodes.size() - 1)) {
return parent;
} else {
return siblingNodes.get(siblingNodes.indexOf(node) + 1);
}
}
public StructureSelectNextAction(DartEditor editor, SelectionHistory history) {
super(SelectionActionMessages.StructureSelectNext_label, editor, history);
setToolTipText(SelectionActionMessages.StructureSelectNext_tooltip);
setDescription(SelectionActionMessages.StructureSelectNext_description);
try {
PlatformUI.getWorkbench().getHelpSystem().setHelp(
this,
DartHelpContextIds.STRUCTURED_SELECT_ENCLOSING_ACTION);
} catch (IllegalStateException ex) {
// ignore workbench-not-created error thrown during testing
}
}
@Override
SourceRange internalGetNewSelectionRange(SourceRange oldSourceRange, AstNode node,
SelectionAnalyzer selAnalyzer) {
if (oldSourceRange.getLength() == 0 && selAnalyzer.getCoveringNode() != null) {
AstNode previousNode = NextNodeAnalyzer.perform(
oldSourceRange.getOffset(),
selAnalyzer.getCoveringNode());
if (previousNode != null) {
return getSelectedNodeSourceRange(node, previousNode);
}
}
AstNode first = selAnalyzer.getFirstSelectedNode();
if (first == null) {
return getLastCoveringNodeRange(oldSourceRange, node, selAnalyzer);
}
AstNode parent = first.getParent();
if (parent == null) {
return getLastCoveringNodeRange(oldSourceRange, node, selAnalyzer);
}
AstNode lastSelectedNode = selAnalyzer.getLastSelectedNode();
AstNode nextNode = getNextNode(parent, lastSelectedNode);
if (nextNode == parent) {
return getSelectedNodeSourceRange(node, first.getParent());
}
int offset = oldSourceRange.getOffset();
int end = Math.min(node.getLength(), nextNode.getOffset() + nextNode.getLength());
return StructureSelectionAction.createSourceRange(offset, end);
}
}