| /* |
| * 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.netbeans.modules.ant.grammar; |
| |
| import java.util.regex.Matcher; |
| import java.util.regex.Pattern; |
| import javax.swing.text.AbstractDocument; |
| import javax.swing.text.AttributeSet; |
| import javax.swing.text.BadLocationException; |
| import javax.swing.text.Segment; |
| import org.netbeans.spi.editor.highlighting.HighlightsSequence; |
| import org.netbeans.spi.editor.highlighting.support.AbstractHighlightsContainer; |
| import org.openide.util.Exceptions; |
| |
| class AntHighlightsContainer extends AbstractHighlightsContainer { |
| |
| private static final Pattern EXPR = Pattern.compile("(?<![$])[$@][{][^{}]+[}]"); |
| |
| private final AbstractDocument doc; |
| private final AttributeSet attrs; |
| |
| public AntHighlightsContainer(AbstractDocument doc, AttributeSet attrs) { |
| this.doc = doc; |
| this.attrs = attrs; |
| } |
| |
| public @Override HighlightsSequence getHighlights(final int startOffset, final int endOffset) { |
| return new HighlightsSequence() { |
| int start, end; |
| final Matcher m; |
| final int scanStart; |
| final int _endOffset; |
| { |
| scanStart = doc.getParagraphElement(startOffset).getStartOffset(); |
| int scanEnd; |
| if (endOffset == Integer.MAX_VALUE) { |
| scanEnd = _endOffset = doc.getLength(); |
| } else { |
| _endOffset = endOffset; |
| scanEnd = doc.getParagraphElement(endOffset).getEndOffset(); |
| } |
| // System.err.println("start/endOffset=" + startOffset + "/" + endOffset + " scanStart/End=" + scanStart + "/" + scanEnd); |
| // XXX could use a custom CharSequence that can take advantage of partialReturn |
| Segment text = new Segment(); |
| try { |
| doc.getText(scanStart, scanEnd - scanStart, text); |
| } catch (BadLocationException x) { |
| Exceptions.printStackTrace(x); |
| } |
| m = EXPR.matcher(text); |
| } |
| public @Override boolean moveNext() { |
| if (!m.find()) { |
| return false; |
| } |
| start = scanStart + m.start(); |
| end = scanStart + m.end(); |
| // System.err.println("start=" + start + " end=" + end); |
| if (end < startOffset) { |
| return moveNext(); |
| } else if (end == startOffset) { |
| end++; |
| return moveNext(); |
| } else if (start < startOffset) { |
| start = startOffset; |
| } else if (start >= _endOffset) { |
| return false; |
| } else if (end > _endOffset) { |
| end = _endOffset; |
| } |
| assert start >= startOffset; |
| if (end > endOffset) { |
| // #189668; happens when debugger tooltip created while hovering over var. |
| return false; |
| } |
| assert end > start; |
| return true; |
| } |
| public @Override int getStartOffset() { |
| return start; |
| } |
| public @Override int getEndOffset() { |
| return end; |
| } |
| public @Override AttributeSet getAttributes() { |
| return attrs; |
| } |
| }; |
| } |
| |
| } |