void IHelpService.RemoveContextAttribute(string name, string value)
{
if (_ServiceProvider != null)
{
IVsUserContext userContext = GetUserContext();
if (userContext != null)
{
NativeMethods.ThrowOnFailure(userContext.RemoveAttribute(name, value));
NotifyContextChange(userContext);
}
}
}
/// <include file='doc\HelpService.uex' path='docs/doc[@for="HelpService.RemoveContextAttribute"]/*' />
/// <devdoc>
/// Removes a previously added context attribute.
/// </devdoc>
public virtual void RemoveContextAttribute(string name, string value)
{
if (provider == null)
{
return;
}
// First, get our context and update the attribute.
//
IVsUserContext cxt = GetUserContext();
if (cxt != null)
{
cxt.RemoveAttribute(name, value);
NotifyContextChange(cxt);
}
}
/// <devdoc>
/// Removes a previously added context attribute.
/// </devdoc>
void IHelpService.RemoveContextAttribute(string name, string value)
{
if (provider == null)
{
return;
}
// First, get our context and update the attribute.
//
IVsUserContext cxt = GetUserContext();
if (cxt != null)
{
NativeMethods.ThrowOnFailure(cxt.RemoveAttribute(name, value));
NotifyContextChange(cxt);
}
}
void IHelpService.ClearContextAttributes()
{
if (_Context != null)
{
NativeMethods.ThrowOnFailure(_Context.RemoveAttribute(null, null));
if (_SubContextList != null)
{
foreach (object obj2 in _SubContextList)
{
IHelpService service = obj2 as IHelpService;
if (service != null)
{
service.ClearContextAttributes();
}
}
}
}
NotifyContextChange(_Context);
}
/// <include file='doc\HelpService.uex' path='docs/doc[@for="HelpService.ClearContextAttributes"]/*' />
/// <devdoc>
/// Clears all existing context attributes from the document.
/// </devdoc>
public virtual void ClearContextAttributes()
{
if (context != null)
{
context.RemoveAttribute(null, null);
if (subContextList != null)
{
foreach (object helpObj in subContextList)
{
if (helpObj is IHelpService)
{
((IHelpService)helpObj).ClearContextAttributes();
}
}
}
}
NotifyContextChange(context);
}
/// <devdoc>
/// Clears all existing context attributes from the document.
/// </devdoc>
void IHelpService.ClearContextAttributes()
{
if (context != null)
{
NativeMethods.ThrowOnFailure(context.RemoveAttribute(null, null));
if (subContextList != null)
{
foreach (object helpObj in subContextList)
{
if (helpObj is IHelpService)
{
((IHelpService)helpObj).ClearContextAttributes();
}
}
}
}
NotifyContextChange(context);
}
// Help for functions and keywords. Initiated by pressing F1.
public override void UpdateLanguageContext(LanguageContextHint hint, IVsTextLines buffer, TextSpan[] ptsSelection, IVsUserContext context)
{
string searchingKeyword = null;
// Search keyword as the function that presented where cursor stays or just before it
Source source = (Source)this.GetSource(buffer);
Debug.Assert(ptsSelection.Length > 0);
int line = ptsSelection[0].iStartLine;
int endPosition = ptsSelection[0].iEndIndex;
var colorState = new DaxEditor.DaxFormatter.DummyColorState();
TokenInfo[] lineInfos = source.GetColorizer().GetLineInfo(buffer, line, colorState);
foreach (var tokenInfo in lineInfos)
{
if (!(tokenInfo.Type == TokenType.Identifier || tokenInfo.Type == TokenType.Keyword))
{
continue;
}
var span = new TextSpan();
span.iStartLine = line;
span.iEndLine = line;
span.iStartIndex = tokenInfo.StartIndex;
span.iEndIndex = tokenInfo.EndIndex + 1;
searchingKeyword = source.GetText(span);
if (span.iEndIndex >= endPosition)
{
break;
}
}
if (!string.IsNullOrEmpty(searchingKeyword))
{
ErrorHandler.ThrowOnFailure(context.RemoveAttribute(null, null));
ErrorHandler.ThrowOnFailure(context.AddAttribute(VSUSERCONTEXTATTRIBUTEUSAGE.VSUC_Usage_Lookup, "keyword", "SQL11.AS.DAXREF." + searchingKeyword + ".F1"));
}
}
internal virtual int UpdateLanguageContext(LanguageContextHint hint, IVsTextLines buffer, TextSpan[] ptsSelection, IVsUserContext context)
{
// From the docs: Any failure code: means the implementer is "passing" on this opportunity to provide context and the text editor will fall back to other mechanisms.
if (ptsSelection == null || ptsSelection.Length != 1) return NativeMethods.E_FAIL;
context.RemoveAttribute(null, null);
TextSpan span = ptsSelection[0];
IVsTextLines lastActiveBuffer;
IVsTextView lastAciveView = this.LastActiveTextView;
if (lastActiveView == null) return NativeMethods.E_FAIL;
NativeMethods.ThrowOnFailure(lastActiveView.GetBuffer(out lastActiveBuffer));
if (lastActiveBuffer != buffer) return NativeMethods.E_FAIL;
ISource source = GetSource(buffer);
if (source == null) return NativeMethods.E_FAIL;
var req = source.BeginBackgroundRequest(span.iStartLine, span.iStartIndex, new TokenInfo(), BackgroundRequestReason.FullTypeCheck, lastActiveView, RequireFreshResults.No, new BackgroundRequestResultHandler(this.HandleUpdateLanguageContextResponse));
if (req == null || req.Result == null) return NativeMethods.E_FAIL;
if ((req.IsSynchronous ||
((req.Result != null) && req.Result.TryWaitForBackgroundRequestCompletion(1000))))
{
if (req.IsAborted) return NativeMethods.E_FAIL;
if (req.ResultScope != null)
{
req.ResultScope.GetF1KeywordString(span, context);
return NativeMethods.S_OK;
}
}
else // result is asynchronous and have not completed within 1000 ms
{
context.AddAttribute(VSUSERCONTEXTATTRIBUTEUSAGE.VSUC_Usage_Filter, "devlang", "fsharp");
context.AddAttribute(VSUSERCONTEXTATTRIBUTEUSAGE.VSUC_Usage_LookupF1_CaseSensitive, "keyword", "fsharp.typechecking.incomplete");
return NativeMethods.S_OK;
}
return NativeMethods.E_FAIL;
}
