public static bool IsLeftSidePosition(DiffPosition position,
UnchangedLinePolicy unchangedLinePolicy = UnchangedLinePolicy.TakeFromLeft)
{
if (position.RightLine != null && position.LeftLine != null)
{
return(unchangedLinePolicy == UnchangedLinePolicy.TakeFromLeft);
}
return(position.LeftLine != null);
}
/// <summary>
/// Throws ArgumentException, ContextMakingException.
/// </summary>
public DiffContext GetContext(DiffPosition position, ContextDepth depth, UnchangedLinePolicy unchangedLinePolicy)
{
if (!Context.Helpers.IsValidPosition(position))
{
throw new ArgumentException(
String.Format("Bad \"position\": {0}", position.ToString()));
}
if (!Context.Helpers.IsValidContextDepth(depth))
{
throw new ArgumentException(
String.Format("Bad \"depth\": {0}", depth.ToString()));
}
// If RightLine is valid, then it points to either added/modified or unchanged line, handle them the same way
bool isRightSideContext = Helpers.IsRightSidePosition(position, unchangedLinePolicy);
int linenumber = isRightSideContext ? Helpers.GetRightLineNumber(position) : Helpers.GetLeftLineNumber(position);
string filename = isRightSideContext ? position.RightPath : position.LeftPath;
string sha = isRightSideContext ? position.Refs.RightSHA : position.Refs.LeftSHA;
GitShowRevisionArguments arguments = new GitShowRevisionArguments(filename, sha);
IEnumerable <string> contents;
try
{
contents = _git?.ShowRevision(arguments);
}
catch (GitNotAvailableDataException ex)
{
throw new ContextMakingException("Cannot obtain git revision", ex);
}
if (contents == null)
{
throw new ContextMakingException("Cannot obtain git revision", null);
}
if (linenumber > contents.Count())
{
throw new ArgumentException(
String.Format("Line number {0} is greater than total line number count, invalid \"position\": {1}",
linenumber.ToString(), position.ToString()));
}
return(createDiffContext(linenumber, isRightSideContext, contents, depth, position));
}
/// <summary>
/// Throws ArgumentException, ContextMakingException.
/// </summary>
public DiffContext GetContext(DiffPosition position, ContextDepth depth, UnchangedLinePolicy unchangedLinePolicy)
{
if (!Context.Helpers.IsValidPosition(position))
{
throw new ArgumentException(
String.Format("Bad \"position\": {0}", position.ToString()));
}
if (!Context.Helpers.IsValidContextDepth(depth))
{
throw new ArgumentException(
String.Format("Bad \"depth\": {0}", depth.ToString()));
}
bool isRightSideContext = Helpers.IsRightSidePosition(position, unchangedLinePolicy);
int linenumber = isRightSideContext ? Helpers.GetRightLineNumber(position) : Helpers.GetLeftLineNumber(position);
string leftFilename = position.LeftPath;
string rightFilename = position.RightPath;
string leftSHA = position.Refs.LeftSHA;
string rightSHA = position.Refs.RightSHA;
try
{
FullContextDiff context = _git.FullContextDiffProvider.GetFullContextDiff(
leftSHA, rightSHA, leftFilename, rightFilename);
Debug.Assert(context.Left.Count == context.Right.Count);
if (linenumber > context.Left.Count)
{
throw new ArgumentException(
String.Format("Line number {0} is greater than total line number count, invalid \"position\": {1}",
linenumber.ToString(), position.ToString()));
}
return(createDiffContext(linenumber, isRightSideContext, context, depth));
}
catch (FullContextDiffProviderException ex)
{
throw new ContextMakingException("Cannot obtain full context diff", ex);
}
}
private DiffContext getDiffContext <T>(DiffPosition position, UnchangedLinePolicy policy) where T : IContextMaker
{
if (position == null || !Core.Context.Helpers.IsValidPosition(position))
{
return(DiffContext.InvalidContext);
}
try
{
T maker = (T)Activator.CreateInstance(typeof(T), _git);
return(maker.GetContext(position, DiffContextDepth, policy));
}
catch (ArgumentException ex)
{
ExceptionHandlers.Handle("Failed to obtain DiffContext", ex);
return(DiffContext.InvalidContext);
}
catch (ContextMakingException ex)
{
ExceptionHandlers.Handle("Failed to obtain DiffContext", ex);
return(DiffContext.InvalidContext);
}
}
