/// <summary>
/// Rearange offsets according to registered changed. Return true, if change was inside this element.
/// NOTE: Removing is handled in checkChildren, here are checked only inside changes.
/// </summary>
/// <param name="change">The change.</param>
/// <returns><c>true</c> if change was inside element, <c>false</c> otherwise.</returns>
private bool rearangeOffsets(LineChange change)
{
// return shorting(change.Start, change.End, change.Shortening);
int sh = change.Shortening;
int curStart = change.Start; //cur position before/after change - is same
int curEndAft = change.End;
int curEndBef = curEndAft - change.Shortening;
if (End < curStart)
{
return(false); //change start after ending
}
bool changed = End >= curStart && Start <= curStart;
if (Start > curStart)
{
Start -= sh;
}
if (End > curStart)
{
End -= sh;
}
return(changed);
}
/// <summary>
/// Apply position changes and return list of changed descendants
/// Element is changed, if no its children wrap whole change.
/// </summary>
/// <param name="change">The change.</param>
/// <param name="result">The result.</param>
/// <returns>List<ElementChange>.</returns>
internal List <ElementChange> ApplyEdit(LineChange change, List <ElementChange> result = null)
{
if (result == null)
{
result = new List <ElementChange>();
}
// if change was inside this element, try to delegate change on some child
bool needFullMatch = !IsRoot && rearangeOffsets(change);
foreach (var child in _children.Values)
{
child.ApplyEdit(change, result);
if (needFullMatch)
{
if (child.Start <= change.Start && child.End >= change.End)
{
needFullMatch = false; //this child contains whole change
}
}
}
if (needFullMatch)
{
result.Add(new ElementChange(this, ChangeKind.Changed));
}
return(result);
}
/// <summary>
/// Register <see cref="LineChange" /> that has been made within watched project.
/// </summary>
/// <param name="change">Registered change.</param>
internal void RegisterChange(LineChange change)
{
FileItemManager fileManager;
if (!_watchedItems.TryGetValue(change.Item, out fileManager))
{
//requested manager is not registered yet
fileManager = registerItem(change.Item, null);
}
if (fileManager == null)
{
//there is no availabe manager for requested change
return;
}
if (change.DocumentLength >= 0)
{
//force checking
fileManager.LineChanged(change);
}
//changes are fired lazily
_changedFileManagers.Add(fileManager);
}
/// <summary>
/// Handler called whenever line of some file is changed.
/// </summary>
/// <param name="startPoint">Start point of change.</param>
/// <param name="endPoint">End point of change.</param>
/// <param name="hint">Hint determining type of change.</param>
private void onLineChanged(TextPoint startPoint, TextPoint endPoint, int hint)
{
//reset change flushing timer
_changeWait.Stop();
_changeWait.Start();
//represent opened editor window
var textDocument = startPoint.Parent;
if (textDocument == null)
{
//there is no available editor window
return;
}
//document assigned to edited source code
var changedDocument = textDocument.Parent;
if (changedDocument == null)
{
//there is no available document
return;
}
var changeStart = startPoint.AbsoluteCharOffset;
var changeEnd = endPoint.AbsoluteCharOffset;
//in debug mode is relativly slow
var documentLength = textDocument.EndPoint.AbsoluteCharOffset;
LogEntry entry = null;
try
{
if (_dte.Solution.SolutionBuild.BuildState == vsBuildState.vsBuildStateInProgress)
{
//no changes can be done during building
return;
}
if (changedDocument.FullName != "")
{
var change = new LineChange(changedDocument, documentLength, changeStart, changeEnd);
_changes.Add(change);
HasWaitingChanges = true;
}
return;
}
catch (COMException ex)
{
entry = new LogEntry(LogLevels.Error, "Line change handler throws COMException", ex.ToString(), null);
}
catch (ArgumentException ex)
{
entry = new LogEntry(LogLevels.Notification, "Line change handler throws ArgumentException", ex.ToString(), null);
}
Log.Entry(entry);
}
/// <summary>
/// modify wrapped element tree according to line change.
/// </summary>
/// <param name="change">The change.</param>
internal void LineChanged(LineChange change)
{
var shortening = _docLength - change.DocumentLength;
_docLength = change.DocumentLength;
change.Shortening = shortening;
registerChanges(Root.ApplyEdit(change));
}
