// --------------------------------------------------------------------------------------------
/// <summary>
/// Initializes a new instance of the <see cref="HelpService"/> class.
/// </summary>
/// <param name="parentService">The parent service.</param>
/// <param name="subContext">The sub context.</param>
/// <param name="cookie">The cookie.</param>
/// <param name="provider">The provider.</param>
/// <param name="priority">The priority.</param>
// --------------------------------------------------------------------------------------------
private HelpService(HelpService parentService, IVsUserContext subContext, uint cookie,
IServiceProvider provider, HelpContextType priority)
{
_Context = subContext;
_ServiceProvider = provider;
_Cookie = cookie;
_ParentService = parentService;
_Priority = priority;
}
// --------------------------------------------------------------------------------------------
/// <summary>
/// Initializes a new instance of the <see cref="HelpService"/> class.
/// </summary>
/// <param name="parentService">The parent service.</param>
/// <param name="subContext">The sub context.</param>
/// <param name="cookie">The cookie.</param>
/// <param name="provider">The provider.</param>
/// <param name="priority">The priority.</param>
// --------------------------------------------------------------------------------------------
private HelpService(HelpService parentService, IVsUserContext subContext, uint cookie,
IServiceProvider provider, HelpContextType priority)
{
_Context = subContext;
_ServiceProvider = provider;
_Cookie = cookie;
_ParentService = parentService;
_Priority = priority;
}
private IVsUserContext GetUserContext()
{
RecreateContext();
if (_Context == null)
{
if (_ServiceProvider == null)
{
return(null);
}
IVsWindowFrame frame = (IVsWindowFrame)_ServiceProvider.GetService(typeof(IVsWindowFrame));
if (frame != null)
{
object obj2;
NativeMethods.ThrowOnFailure(frame.GetProperty(-3010, out obj2));
_Context = (IVsUserContext)obj2;
}
if (_Context == null)
{
IVsMonitorUserContext context =
(IVsMonitorUserContext)_ServiceProvider.GetService(typeof(IVsMonitorUserContext));
if (context != null)
{
NativeMethods.ThrowOnFailure(context.CreateEmptyContext(out _Context));
if (((_Context != null) && (frame != null)) && IsToolWindow(frame))
{
NativeMethods.ThrowOnFailure(frame.SetProperty(-3010, _Context));
}
}
}
if ((_SubContextList != null) && (_Context != null))
{
foreach (object obj3 in _SubContextList)
{
HelpService service = obj3 as HelpService;
if (service != null)
{
service.RecreateContext();
}
}
}
}
return(_Context);
}
void IDisposable.Dispose()
{
if ((_SubContextList != null) && (_SubContextList.Count > 0))
{
foreach (HelpService service in _SubContextList)
{
service._ParentService = null;
if (_Context != null)
{
try
{
_Context.RemoveSubcontext(service._Cookie);
}
catch
{
}
}
((IDisposable)service).Dispose();
}
_SubContextList = null;
}
if (_ParentService != null)
{
IHelpService parentService = _ParentService;
_ParentService = null;
parentService.RemoveLocalContext(this);
}
if (_ServiceProvider != null)
{
_ServiceProvider = null;
}
if (_Context != null)
{
Marshal.ReleaseComObject(_Context);
_Context = null;
}
_Cookie = 0;
}
private IHelpService CreateLocalContext(HelpContextType contextType, bool recreate, out IVsUserContext localContext,
out uint cookie)
{
cookie = 0;
localContext = null;
if (_ServiceProvider != null)
{
localContext = null;
int hr = 0;
IVsMonitorUserContext context =
(IVsMonitorUserContext) _ServiceProvider.GetService(typeof (IVsMonitorUserContext));
if (context != null)
{
try
{
hr = context.CreateEmptyContext(out localContext);
}
catch (COMException exception)
{
hr = exception.ErrorCode;
}
}
if (NativeMethods.Succeeded(hr) && (localContext != null))
{
VSUSERCONTEXTPRIORITY vsusercontextpriority = VSUSERCONTEXTPRIORITY.VSUC_Priority_None;
switch (contextType)
{
case HelpContextType.Ambient:
vsusercontextpriority = VSUSERCONTEXTPRIORITY.VSUC_Priority_Ambient;
break;
case HelpContextType.Window:
vsusercontextpriority = VSUSERCONTEXTPRIORITY.VSUC_Priority_Window;
break;
case HelpContextType.Selection:
vsusercontextpriority = VSUSERCONTEXTPRIORITY.VSUC_Priority_Selection;
break;
case HelpContextType.ToolWindowSelection:
vsusercontextpriority = VSUSERCONTEXTPRIORITY.VSUC_Priority_ToolWndSel;
break;
}
IVsUserContext userContext = GetUserContext();
if (userContext != null)
{
try
{
hr = userContext.AddSubcontext(localContext, (int) vsusercontextpriority, out cookie);
}
catch (COMException exception2)
{
hr = exception2.ErrorCode;
}
}
if ((NativeMethods.Succeeded(hr) && (cookie != 0)) && !recreate)
{
HelpService service = new HelpService(this, localContext, cookie, _ServiceProvider, contextType);
if (_SubContextList == null)
{
_SubContextList = new ArrayList();
}
_SubContextList.Add(service);
return service;
}
}
}
return null;
}
void IDisposable.Dispose()
{
if ((_SubContextList != null) && (_SubContextList.Count > 0))
{
foreach (HelpService service in _SubContextList)
{
service._ParentService = null;
if (_Context != null)
{
try
{
_Context.RemoveSubcontext(service._Cookie);
}
catch
{
}
}
((IDisposable) service).Dispose();
}
_SubContextList = null;
}
if (_ParentService != null)
{
IHelpService parentService = _ParentService;
_ParentService = null;
parentService.RemoveLocalContext(this);
}
if (_ServiceProvider != null)
{
_ServiceProvider = null;
}
if (_Context != null)
{
Marshal.ReleaseComObject(_Context);
_Context = null;
}
_Cookie = 0;
}
private IHelpService CreateLocalContext(HelpContextType contextType, bool recreate, out IVsUserContext localContext,
out uint cookie)
{
cookie = 0;
localContext = null;
if (_ServiceProvider != null)
{
localContext = null;
int hr = 0;
IVsMonitorUserContext context =
(IVsMonitorUserContext)_ServiceProvider.GetService(typeof(IVsMonitorUserContext));
if (context != null)
{
try
{
hr = context.CreateEmptyContext(out localContext);
}
catch (COMException exception)
{
hr = exception.ErrorCode;
}
}
if (NativeMethods.Succeeded(hr) && (localContext != null))
{
VSUSERCONTEXTPRIORITY vsusercontextpriority = VSUSERCONTEXTPRIORITY.VSUC_Priority_None;
switch (contextType)
{
case HelpContextType.Ambient:
vsusercontextpriority = VSUSERCONTEXTPRIORITY.VSUC_Priority_Ambient;
break;
case HelpContextType.Window:
vsusercontextpriority = VSUSERCONTEXTPRIORITY.VSUC_Priority_Window;
break;
case HelpContextType.Selection:
vsusercontextpriority = VSUSERCONTEXTPRIORITY.VSUC_Priority_Selection;
break;
case HelpContextType.ToolWindowSelection:
vsusercontextpriority = VSUSERCONTEXTPRIORITY.VSUC_Priority_ToolWndSel;
break;
}
IVsUserContext userContext = GetUserContext();
if (userContext != null)
{
try
{
hr = userContext.AddSubcontext(localContext, (int)vsusercontextpriority, out cookie);
}
catch (COMException exception2)
{
hr = exception2.ErrorCode;
}
}
if ((NativeMethods.Succeeded(hr) && (cookie != 0)) && !recreate)
{
HelpService service = new HelpService(this, localContext, cookie, _ServiceProvider, contextType);
if (_SubContextList == null)
{
_SubContextList = new ArrayList();
}
_SubContextList.Add(service);
return(service);
}
}
}
return(null);
}
