| /******************************************************************************* |
| * Copyright (c) 2009 University of Illinois at Urbana-Champaign and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * UIUC - Initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.photran.internal.ui.editor_vpg.folding; |
| |
| import java.util.ArrayList; |
| |
| import org.eclipse.jface.text.Position; |
| import org.eclipse.photran.internal.core.analysis.binding.Definition; |
| import org.eclipse.photran.internal.core.analysis.binding.ScopingNode; |
| import org.eclipse.photran.internal.core.lexer.Token; |
| import org.eclipse.photran.internal.core.lexer.TokenList; |
| import org.eclipse.photran.internal.core.parser.ASTExecutableProgramNode; |
| import org.eclipse.photran.internal.core.parser.GenericASTVisitor; |
| import org.eclipse.photran.internal.core.parser.IASTNode; |
| import org.eclipse.photran.internal.ui.editor.FortranEditor; |
| import org.eclipse.photran.internal.ui.editor_vpg.DefinitionMap; |
| import org.eclipse.photran.internal.ui.editor_vpg.FortranEditorTasks; |
| import org.eclipse.photran.internal.ui.editor_vpg.FortranVPGSourceViewerConfigurationFactory; |
| import org.eclipse.photran.internal.ui.editor_vpg.IFortranEditorASTTask; |
| import org.eclipse.swt.widgets.Display; |
| |
| /** |
| * Provides folding structure for the Fortran editor (i.e., its ability to collapse functions, modules, etc.). |
| * <p> |
| * This class implements {@link IFortranEditorASTTask} and is installed by |
| * {@link FortranVPGSourceViewerConfigurationFactory#create(org.eclipse.photran.internal.ui.editor.FortranEditor)} |
| * |
| * @author Jeff Overbey |
| * @author Kurt Hendle |
| */ |
| public class FortranFoldingProvider implements IFortranEditorASTTask |
| { |
| protected FortranEditor editor = null; |
| |
| public void setup(FortranEditor editor) |
| { |
| this.editor = editor; |
| FortranEditorTasks.instance(editor).addASTTask(this); |
| } |
| |
| public boolean handle(ASTExecutableProgramNode ast, TokenList tokenList, DefinitionMap<Definition> defMap) |
| { |
| if (editor == null) return false; |
| |
| final FoldingVisitor visitor = new FoldingVisitor(); |
| ast.accept(visitor); |
| |
| Display.getDefault().asyncExec(new Runnable() |
| { |
| public void run() |
| { |
| editor.updateFoldingStructure(visitor.positions); |
| } |
| }); |
| |
| return true; |
| } |
| |
| private static class FoldingVisitor extends GenericASTVisitor |
| { |
| final ArrayList<Position> positions = new ArrayList<Position>(); |
| |
| @Override |
| public void visitASTNode(IASTNode node) |
| { |
| if (node instanceof ScopingNode && !(node instanceof ASTExecutableProgramNode)) |
| fold(node); |
| |
| traverseChildren(node); |
| } |
| |
| private void fold(IASTNode node) |
| { |
| Token firstToken = node.findFirstToken(); |
| Token lastToken = node.findLastToken(); |
| if (firstToken == null || lastToken == null) return; |
| |
| int offset = firstToken.getFileOffset(); |
| int length = (lastToken.getFileOffset() + lastToken.getLength() - firstToken.getFileOffset()); |
| |
| positions.add(new Position(offset, length)); |
| } |
| } |
| } |