| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 |
| * |
| * 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 org.apache.uima.ruta.ide.formatter; |
| |
| import java.io.IOException; |
| import java.io.LineNumberReader; |
| import java.io.Reader; |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.antlr.runtime.BitSet; |
| import org.antlr.runtime.CommonToken; |
| import org.antlr.runtime.CommonTokenStream; |
| import org.apache.commons.lang3.StringUtils; |
| import org.apache.uima.ruta.engine.RutaEngine; |
| import org.apache.uima.ruta.ide.core.parser.RutaSourceParser; |
| import org.eclipse.dltk.ast.declarations.ModuleDeclaration; |
| import org.eclipse.dltk.ast.parser.IModuleDeclaration; |
| import org.eclipse.dltk.compiler.problem.IProblem; |
| import org.eclipse.dltk.compiler.problem.IProblemReporter; |
| import org.eclipse.dltk.formatter.AbstractScriptFormatter; |
| import org.eclipse.dltk.formatter.FormatterDocument; |
| import org.eclipse.dltk.ui.formatter.FormatterException; |
| import org.eclipse.text.edits.MultiTextEdit; |
| import org.eclipse.text.edits.ReplaceEdit; |
| import org.eclipse.text.edits.TextEdit; |
| |
| public class RutaFormatter extends AbstractScriptFormatter { |
| |
| class DummyReporter implements IProblemReporter { |
| |
| private boolean gotProblems = false; |
| |
| public void reportProblem(IProblem problem) { |
| setProblems(true); |
| } |
| |
| public void setProblems(boolean gotProblems) { |
| this.gotProblems = gotProblems; |
| } |
| |
| public boolean gotProblems() { |
| return gotProblems; |
| } |
| }; |
| |
| protected static final String[] INDENTING = { RutaFormatterConstants.INDENT_BLOCK, |
| RutaFormatterConstants.INDENT_STRUCTURE }; |
| |
| // protected static final String[] BLANK_LINES = { }; |
| |
| private final String lineDelimiter; |
| |
| public RutaFormatter(String lineDelimiter, Map preferences) { |
| super(preferences); |
| this.lineDelimiter = lineDelimiter; |
| } |
| |
| public TextEdit format(String source, int offset, int length, int indent) |
| throws FormatterException { |
| String input = source; |
| // TODO implement useful format for code snippets |
| // final String input = source.substring(offset, offset + length); |
| if (StringUtils.isEmpty(input)) { |
| return null; |
| } |
| RutaSourceParser tmsp = new RutaSourceParser(); |
| |
| DummyReporter reporter = new DummyReporter(); |
| IModuleDeclaration md = tmsp.parse("format" + RutaEngine.SCRIPT_FILE_EXTENSION, source, |
| reporter); |
| CommonTokenStream tokenStream = tmsp.getTokenStream(); |
| |
| if (!reporter.gotProblems()) { |
| |
| BitSet bs = new BitSet(); |
| bs.add(org.apache.uima.ruta.parser.RutaParser.LINE_COMMENT); |
| bs.add(org.apache.uima.ruta.parser.RutaParser.COMMENT); |
| List<CommonToken> comments = (List<CommonToken>) tokenStream.getTokens(0, tokenStream.size(), bs); |
| |
| final String output = format(input, (ModuleDeclaration) md, comments, indent); |
| if (output != null) { |
| if (!input.equals(output)) { |
| return new ReplaceEdit(0, source.length(), output); |
| // return new ReplaceEdit(offset, length, output); |
| // if (!equalsIgnoreBlanks(new StringReader(input), new StringReader(output))) { |
| // // return new MultiTextEdit(); |
| // return new ReplaceEdit(offset, length, output); |
| // } else { |
| // // TODO reset throwing exception |
| // return new MultiTextEdit(); |
| // // throw new IllegalArgumentException("illegal format context"); |
| // // System.err.println("illegal format context"); |
| // } |
| } else { |
| return new MultiTextEdit(); |
| } |
| } |
| } |
| return null; |
| } |
| |
| /** |
| * @param input |
| * @param md |
| * @param indent |
| * @return the formatted code |
| */ |
| private String format(String input, ModuleDeclaration md, List<CommonToken> comments, int indent) { |
| final FormatterDocument document = createDocument(input); |
| |
| // compute new (formatted) document structure |
| RutaFormattedPrinter tmfp = new RutaFormattedPrinter(document, lineDelimiter, |
| createIndentGenerator(), comments, this); |
| try { |
| md.traverse(tmfp); |
| } catch (Exception e) { |
| // TODO Auto-generated catch block |
| e.printStackTrace(); |
| } |
| return tmfp.getOutput(); |
| |
| // // compute new (formatted) document structure |
| // final RutaFormatterNodeBuilder builder = new RutaFormatterNodeBuilder(); |
| // IFormatterContainerNode root = builder.build(md, document); |
| // // new RutaFormatterNodeRewriter(result, document).rewrite(root); |
| // IFormatterContext context = new FormatterContext(indent); |
| // FormatterWriter writer = new FormatterWriter(document, lineDelimiter, |
| // createIndentGenerator()); |
| // try { |
| // root.accept(context, writer); |
| // writer.flush(context); |
| // return writer.getOutput(); |
| // } catch (Exception e) { |
| // e.printStackTrace(); |
| // return null; |
| // } |
| } |
| |
| /** |
| * Factory method for FormatterDocuments that represent the content with formatting options.<br> |
| * No formatting operations done in this method and no formatting done with the content of the |
| * formatterDocument in general. |
| * |
| * @param input |
| * @return |
| */ |
| private FormatterDocument createDocument(String input) { |
| FormatterDocument document = new FormatterDocument(input); |
| for (int i = 0; i < INDENTING.length; ++i) { |
| document.setBoolean(INDENTING[i], getBoolean(INDENTING[i])); |
| } |
| document.setInt(RutaFormatterConstants.FORMATTER_TAB_SIZE, |
| getInt(RutaFormatterConstants.FORMATTER_TAB_SIZE)); |
| return document; |
| } |
| |
| private boolean equalsIgnoreBlanks(Reader inputReader, Reader outputReader) { |
| LineNumberReader input = new LineNumberReader(inputReader); |
| LineNumberReader output = new LineNumberReader(outputReader); |
| for (;;) { |
| final String inputLine = readLine(input); |
| final String outputLine = readLine(output); |
| if (inputLine == null) { |
| if (outputLine == null) { |
| return true; |
| } else { |
| return false; |
| } |
| } else if (outputLine == null) { |
| return false; |
| } else if (!inputLine.equals(outputLine)) { |
| return false; |
| } |
| } |
| } |
| |
| private String readLine(LineNumberReader reader) { |
| String line; |
| do { |
| try { |
| line = reader.readLine(); |
| } catch (IOException e) { |
| return null; // just doing sth. |
| } |
| if (line == null) { |
| return line; |
| } |
| line = line.trim(); |
| } while (line.length() == 0); |
| return line; |
| } |
| |
| @Override |
| public int getInt(String key) { |
| return super.getInt(key); |
| } |
| |
| @Override |
| protected boolean getBoolean(String key) { |
| return super.getBoolean(key); |
| } |
| |
| @Override |
| protected String getString(String key) { |
| return super.getString(key); |
| } |
| |
| } |