//该方法将不同行细分为：修改、删除、新增类型；
private bool AddChanges(
ArrayList report,
int curDest,
int nextDest,
int curSource,
int nextSource)
{
bool retval = false;
int diffDest = nextDest - curDest;//下一个区域的索引减去当前区域索引（区域总共多少行？）
int diffSource = nextSource - curSource;
int minDiff = 0;
if (diffDest > 0)
{
if (diffSource > 0)
{
minDiff = Math.Min(diffDest, diffSource);
//curDest---新版本文件中区域块第一行的索引
//curSource --- 老版本文件中区域块第一行索引
//minDiff ---区域块中行数目
report.Add(DiffResultSpan.CreateReplace(curDest, curSource, minDiff));
//比如老版本10行，新版本5行；合并后10行不同，前5行是修改状态，后5行是新增状态
//minDiff = 5；
if (diffDest > diffSource)
{
curDest += minDiff;
report.Add(DiffResultSpan.CreateAddDestination(curDest, diffDest - diffSource));
}
else//比如老版本3行，新版本5行；合并后5行不同，前3行是修改状态，后2行是删除状态
//minDiff = 3;
{
if (diffSource > diffDest)
{
curSource += minDiff;
report.Add(DiffResultSpan.CreateDeleteSource(curSource, diffSource - diffDest));
}
}
}
else //diffSource == 0表示老版本没有行，新版本有，表示新增行
{
report.Add(DiffResultSpan.CreateAddDestination(curDest, diffDest));
}
retval = true;
}
else
{
if (diffSource > 0)
{
report.Add(DiffResultSpan.CreateDeleteSource(curSource, diffSource));
retval = true;
}
}
return(retval);
}
private bool AddChanges(
List <DiffResultSpan> report,
int curDest,
int nextDest,
int curSource,
int nextSource)
{
bool retval = false;
int diffDest = nextDest - curDest;
int diffSource = nextSource - curSource;
int minDiff = 0;
if (diffDest > 0)
{
if (diffSource > 0)
{
minDiff = Math.Min(diffDest, diffSource);
report.Add(DiffResultSpan.CreateReplace(curDest, curSource, minDiff));
if (diffDest > diffSource)
{
curDest += minDiff;
report.Add(DiffResultSpan.CreateAddDestination(curDest, diffDest - diffSource));
}
else
{
if (diffSource > diffDest)
{
curSource += minDiff;
report.Add(DiffResultSpan.CreateDeleteSource(curSource, diffSource - diffDest));
}
}
}
else
{
report.Add(DiffResultSpan.CreateAddDestination(curDest, diffDest));
}
retval = true;
}
else
{
if (diffSource > 0)
{
report.Add(DiffResultSpan.CreateDeleteSource(curSource, diffSource));
retval = true;
}
}
return(retval);
}