org.eclipse.xtext.formatting2.regionaccess.ILineRegion Java Examples

@Override
public ILineRegion regionForLineAtOffset(int offset) {
	String text = getText();
	if (offset < 0 || offset > text.length())
		return null;
	int start = text.lastIndexOf('\n', offset) + 1;
	if (start < 0)
		start = 0;
	int end = text.indexOf('\n', offset + 1);
	if (end > 0) {
		if (text.charAt(end - 1) == '\r')
			end = end - 1;
	} else
		end = text.length();
	return new LineRegion(this, start, end - start);
}
 

@Override
public ILineRegion getNextLine() {
	ITextRegionAccess access = getTextRegionAccess();
	int start = getEndOffset() + 1;
	String text = access.regionForDocument().getText();
	while (true) {
		if (start >= text.length())
			return null;
		char c = text.charAt(start);
		if (c == '\n' || c == '\r')
			start++;
		else
			break;
	}
	int end = text.indexOf('\n', start);
	if (end > 0) {
		if (text.charAt(end - 1) == '\r')
			end = end - 1;
	} else
		end = text.length();
	return new LineRegion(access, start, end - start);
}
 

@Override
public ILineRegion getPreviousLine() {
	ITextRegionAccess access = getTextRegionAccess();
	int end = getOffset() - 1;
	String text = access.regionForDocument().getText();
	while (true) {
		if (end < 0)
			return null;
		char c = text.charAt(end);
		if (c == '\n' || c == '\r')
			end--;
		else
			break;
	}
	int start = text.lastIndexOf('\n', end);
	if (start < 0)
		start = 0;
	return new LineRegion(access, start, end - start);
}
 

private ITextSegment getRegionForLines(ITextRegionAccess regions, int offset, int lines) {
	ILineRegion firstLine = regions.regionForLineAtOffset(offset);
	ILineRegion lastLine = firstLine;
	for (int i = 1; i < lines; i++) {
		ILineRegion next = lastLine.getNextLine();
		if (next != null) {
			lastLine = next;
		} else {
			break;
		}
	}
	int firstLineOffset = firstLine.getOffset();
	ITextSegment region = regions.regionForOffset(firstLineOffset, (lastLine.getEndOffset() - firstLineOffset) + 1);
	return region;
}
 

public ITextSegment getFrame() {
	if (this.frame != null)
		return this.frame;
	ITextRegionAccess access = getTextRegionAccess();
	if (access != null) {
		ITextSegment impactRegion = TextRegions.merge(this.items);
		List<ILineRegion> expandToLines = TextRegions.expandToLines(impactRegion, getLeadingLines(),
				getTrailingLines());
		return TextRegions.merge(expandToLines);
	}
	return null;
}
 

public ITextSegment getFrame() {
	if (this.frame != null)
		return this.frame;
	ITextRegionAccess access = getTextRegionAccess();
	if (access != null) {
		List<ITextSegment> segments = Lists.newArrayList();
		for (Item item : items)
			segments.add(item.getRegion());
		ITextSegment impactRegion = merge(segments);
		List<ILineRegion> expandToLines = expandToLines(impactRegion, getLeadingLines(), getTrailingLines());
		return merge(expandToLines);
	}
	return null;
}
 

@Override
public List<ILineRegion> getLineRegions() {
	ILineRegion current = getTextRegionAccess().regionForLineAtOffset(getOffset());
	List<ILineRegion> result = Lists.newArrayList();
	int endOffset = getEndOffset();
	while (current != null) {
		result.add(current);
		if (current.getEndOffset() >= endOffset)
			return result;
		current = current.getNextLine();
		if (current == null || current.getOffset() >= endOffset)
			return result;
	}
	return result;
}
 

public String getLineText(ILineRegion line) {
	ITextSegment segment = this.access.regionForOffset(line.getOffset(), line.getLength());
	return segment.getText();
}
 

public ILineRegion getFirstLine(int offset) {
	return this.access.regionForLineAtOffset(offset);
}
 

public ILineRegion getNextLine(ILineRegion currentLine) {
	return currentLine.getNextLine();
}
 

public int getLineOffset(ILineRegion currentLine) {
	return currentLine.getOffset() - getCommentOffset();
}
 

public int getLineLength(ILineRegion currentLine) {
	return currentLine.getLength();
}