| /* |
| * 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.felix.gogo.jline; |
| |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| |
| import org.apache.felix.gogo.runtime.EOFError; |
| import org.apache.felix.gogo.runtime.Parser.Program; |
| import org.apache.felix.gogo.runtime.Parser.Statement; |
| import org.apache.felix.gogo.runtime.SyntaxError; |
| import org.apache.felix.gogo.runtime.Token; |
| import org.jline.reader.ParsedLine; |
| |
| public class Parser implements org.jline.reader.Parser { |
| |
| public ParsedLine parse(String line, int cursor, ParseContext context) throws org.jline.reader.SyntaxError { |
| try { |
| return doParse(line, cursor, context); |
| } catch (EOFError e) { |
| throw new org.jline.reader.EOFError(e.line(), e.column(), e.getMessage(), e.missing()); |
| } catch (SyntaxError e) { |
| throw new org.jline.reader.SyntaxError(e.line(), e.column(), e.getMessage()); |
| } |
| } |
| |
| private ParsedLine doParse(String line, int cursor, ParseContext parseContext) throws SyntaxError { |
| Program program = null; |
| List<Statement> statements = null; |
| String repaired = line; |
| while (program == null) { |
| try { |
| org.apache.felix.gogo.runtime.Parser parser = new org.apache.felix.gogo.runtime.Parser(repaired); |
| program = parser.program(); |
| statements = parser.statements(); |
| } catch (EOFError e) { |
| // Make sure we don't loop forever |
| if (parseContext == ParseContext.COMPLETE && repaired.length() < line.length() + 1024) { |
| repaired = repaired + " " + e.repair(); |
| } else { |
| throw e; |
| } |
| } |
| } |
| // Find corresponding statement |
| Statement statement = null; |
| for (int i = statements.size() - 1; i >= 0; i--) { |
| Statement s = statements.get(i); |
| if (s.start() <= cursor) { |
| boolean isOk = true; |
| // check if there are only spaces after the previous statement |
| if (s.start() + s.length() < cursor) { |
| for (int j = s.start() + s.length(); isOk && j < cursor; j++) { |
| isOk = Character.isWhitespace(line.charAt(j)); |
| } |
| } |
| statement = s; |
| break; |
| } |
| } |
| if (statement != null && statement.tokens() != null && !statement.tokens().isEmpty()) { |
| if (repaired != line) { |
| Token stmt = statement.subSequence(0, line.length() - statement.start()); |
| List<Token> tokens = new ArrayList<>(statement.tokens()); |
| Token last = tokens.get(tokens.size() - 1); |
| tokens.set(tokens.size() - 1, last.subSequence(0, line.length() - last.start())); |
| return new ParsedLineImpl(program, stmt, cursor, tokens); |
| } |
| return new ParsedLineImpl(program, statement, cursor, statement.tokens()); |
| } else { |
| // TODO: |
| return new ParsedLineImpl(program, program, cursor, Collections.singletonList(program)); |
| } |
| } |
| |
| } |