internal void Rebuild()
{
DocumentLine line = _lineTree.GetLineByNumber(1);
SimpleSegment seg = DocumentLineSeeker.NextLineDelimiter(_doc, 0);
var lines = new List <DocumentLine>();
Int32 lastDelimeterEnd = 0;
while (seg != SimpleSegment.Invalid)
{
line._exactLength = seg.StartOffset + seg.Length - lastDelimeterEnd;
line._delimiterLength = seg.Length;
lastDelimeterEnd = seg.StartOffset + seg.Length;
lines.Add(line);
#if DEBUG
line = new DocumentLine(_doc);
#else
line = new DocumentLine();
#endif
seg = DocumentLineSeeker.NextLineDelimiter(_doc, lastDelimeterEnd);
}
// 最后一行也要处理
line._exactLength = _doc.Length - lastDelimeterEnd;
lines.Add(line);
_lineTree.RebuildTree(lines);
}
internal void Insert(Int32 offset, String text, DocumentUpdate update)
{
DocumentLine line = _lineTree.GetLineByOffset(offset);
// 不允许在\r和\n之间插入文本
SimpleSegment seg = DocumentLineSeeker.NextLineDelimiter(text, 0);
if (seg == SimpleSegment.Invalid)
{
update.LineNumberNeedUpdate = line.LineNumber;
// 插入的文本没有新的行，直接加入当前行
SetLineLength(line, line._exactLength + text.Length);
return;
}
update.LineNumberNeedUpdate = line.LineNumber;
update.NewStartLineNumber = update.LineNumberNeedUpdate + 1;
// 和前置行合并
Int32 lineOffset = line.StartOffset;
Int32 lineBreakOffset = offset + seg.EndOffset;
Int32 lengthAfterInsertion = lineOffset + line._exactLength - offset;
Int32 delimiterLengthAfterInsertion = line._delimiterLength;
line._delimiterLength = seg.Length;
SetLineLength(line, lineBreakOffset - lineOffset);
Int32 lastDelimeterEnd = seg.EndOffset;
seg = DocumentLineSeeker.NextLineDelimiter(text, lastDelimeterEnd);
// 中间行处理
while (seg != SimpleSegment.Invalid)
{
#if DEBUG
var newLine = new DocumentLine(_doc);
#else
var newLine = new DocumentLine();
#endif
++update.NewLineCount;
newLine._delimiterLength = seg.Length;
newLine._exactLength = seg.EndOffset - lastDelimeterEnd;
_lineTree.InsertLineAfter(line, newLine);
line = newLine;
lastDelimeterEnd = seg.EndOffset;
seg = DocumentLineSeeker.NextLineDelimiter(text, lastDelimeterEnd);
}
// 和后置行合并
#if DEBUG
var afterLine = new DocumentLine(_doc);
#else
var afterLine = new DocumentLine();
#endif
++update.NewLineCount;
afterLine._delimiterLength = delimiterLengthAfterInsertion;
afterLine._exactLength = lengthAfterInsertion + (text.Length - lastDelimeterEnd);
_lineTree.InsertLineAfter(line, afterLine);
}