/// <summary>
/// Constructor.
/// </summary>
/// <param name="eventType">position change, or add/change/delete a method</param>
/// <param name="methodObj">method name, type, file FilePath, start line number of the method</param>
/// <param name="curLine">current line number of the method</param>
/// <param name="curColumn">current column of the method</param>
public MethodEventRaisedArgs(MethodEventType eventType, Method methodObj, Method oldMethod, int curLine, int curColumn)
{
this.EventType = eventType;
this.method = methodObj;
this.oldMethod = oldMethod;
this.curLine = curLine;
this.curColumn = curColumn;
}
public MethodEventRaisedArgs(MethodEventType eventType, Method methodObj, Method oldMethod)
: this(eventType, methodObj, oldMethod, 0, 0)
{
}
public MethodEventRaisedArgs(Method methodObj, Method oldMethod, int curLine, int curColumn)
: this(MethodEventType.PositionChanged, methodObj, oldMethod, curLine, curColumn)
{
}
private static bool CompareMethodDefinitions(Method a, Method b)
{
if (a == null || b == null)
return false;
if (a.Name == b.Name
&& ParameterTypesMatch(a.ParameterTypes, b.ParameterTypes)
)
{
return a.StartLineNumber == b.StartLineNumber;
}
else
return false;
}
public bool Equals(Method b) {
if(null == b) { return false; }
return CompareMethodDefinitions(this, b);
}
/// <summary>
/// Determine if two methods have the same signatures (name, paramtertype)
/// </summary>
/// <param name="b"></param>
/// <returns></returns>
public bool SignatureEquals(Method b)
{
if (null == b)
{
return false;
}
return (this.Name == b.Name && ParameterTypesMatch(this.ParameterTypes, b.ParameterTypes));
}
private void DeleteMethodsInDeletedFile(string deletedFilePath)
{
if (_currentMethod.FilePath == deletedFilePath)
_currentMethod = new Method();
foreach (var method in _navigatedMethods)
{
if (method.FilePath == deletedFilePath)
{
_navigatedMethods.Remove(method);
OnMethodUpdatedEvent(new MethodEventRaisedArgs(MethodEventType.MethodDeleted, null, method));
}
}
}
public MethodTrack(IServiceProvider sp)
{
_serviceProvider = sp;
_dataService = sp.GetService(typeof(SSrcMLDataService)) as ISrcMLDataService;
_srcmlService = sp.GetService(typeof(SSrcMLGlobalService)) as ISrcMLGlobalService;
_cursorMonitor = sp.GetService(typeof(SCursorMonitorService)) as ICursorMonitorService;
_currentMethod = new Method();
_navigatedMethods = new List<Method>();
_currentCursor = new CursorPos("", 0, 0);
if (null != _cursorMonitor)
_cursorMonitor.PropertyChanged += OnCursorMoving;
if(null != _srcmlService)
_srcmlService.SourceFileChanged += OnFileChanged;
}
/// <summary>
/// Determine the state of a previously navigated method in the file which it was located at
/// </summary>
/// <param name="preNavigatedMethod">a previously navigated method</param>
/// <param name="newAllMethods">collection of all methods after a file change (where the previously navigate method wass located)</param>
/// <param name="newMethod">a new method object is also returned if the function returns 1</param>
/// <returns>0 - unchanged, 1 - still there but changed, 2 - deleted</returns>
private int MethodUpdatedState(Method preNavigatedMethod, List<Method> newAllMethods, out Method newMethod)
{
//method change: "name", "type" and "prameter type" remain the same but startline number changes
//method deletion: no longer find a method with the same (type + name + parameter type)
//todo: method rename is a special case might be handled later (it may need a comparision of the method body)
newMethod = new Method();
foreach (var method in newAllMethods)
{
if (method.SignatureEquals(preNavigatedMethod) && method.Type == preNavigatedMethod.Type)
{
if (method.Equals(preNavigatedMethod)) //StartLineNumber comparison
return 0;
else
{
newMethod = method;
return 1;
}
}
}
return 2;
}
private void ChangeMethodsInChangedFile(string oldFilePath)
{
List<Method> allMethods;
GetAllMethods(oldFilePath, out allMethods);
for (int i=0; i < _navigatedMethods.Count; i++)
{
if (_navigatedMethods[i].FilePath == oldFilePath)
{
var method = _navigatedMethods[i];
Method newMethod;
var updateType = MethodUpdatedState(method, allMethods, out newMethod);
switch (updateType)
{
case 0: // unchanged
break;
case 1: // stays but changed
_navigatedMethods[i] = newMethod;
OnMethodUpdatedEvent(new MethodEventRaisedArgs(MethodEventType.MethodChanged, newMethod, method));
if (_currentMethod.Equals(method))
_currentMethod = newMethod;
break;
case 2: // deleted
_navigatedMethods.RemoveAt(i);
OnMethodUpdatedEvent(new MethodEventRaisedArgs(MethodEventType.MethodDeleted, null, method));
if (_currentMethod.Equals(method))
_currentMethod = new Method();
break;
}
}
}
}
private void ChangeMethodsInRenamedFile(string oldFilePath, string newFilePath)
{
if(oldFilePath == newFilePath)
return;
for (var i=0; i< _navigatedMethods.Count; i++)
{
if (_navigatedMethods[i].FilePath == oldFilePath)
{
var oldmethod = _navigatedMethods[i];
_navigatedMethods[i].FilePath = newFilePath;
var method = _navigatedMethods[i];
OnMethodUpdatedEvent(new MethodEventRaisedArgs(MethodEventType.MethodChanged, method, oldmethod));
if (_currentMethod.SignatureEquals(method))
_currentMethod = method;
}
}
}
private void AddMethodToHistoryList(Method currentMethod)
{
if(! _navigatedMethods.Contains(_currentMethod))
_navigatedMethods.Add(currentMethod);
}
/// <summary>
/// Get a method object from (file, line number, column number)
/// </summary>
/// <param name="fileName"></param>
/// <param name="lineNum"></param>
/// <param name="colNum"></param>
/// <returns>if the cursor is in a method, return true; otherwise return false</returns>
private bool GetMethod(string fileName, int lineNum, int colNum)
{
bool isInMethod = false;
if (null == _dataService)
return false;
var data = _dataService.CurrentDataArchive.GetData(fileName);
if (null != data)
{
var methods = data.GetDescendants<MethodDefinition>();
foreach (var methoddef in methods)
{
SourceLocation cursorPos = new SourceLocation(fileName, lineNum, colNum);
if (methoddef.ContainsLocation(cursorPos))
{
isInMethod = true;
_currentMethod = new Method(methoddef);
break;
//assert(outMethod.filePath.equals(fileName))
}
}
}
return isInMethod;
}