public ITextStructureNavigator CreateTextStructureNavigator(ITextBuffer textBuffer)
{
if (textBuffer == null)
{
throw new ArgumentNullException("textBuffer");
}
ITextStructureNavigator delegateTextStructureNavigator = TextStructureNavigatorSelectorService.CreateTextStructureNavigator(textBuffer, AnyContentType);
return(new AlloyTextStructureNavigator(textBuffer, delegateTextStructureNavigator));
}
private string GetCurrentEditorWord()
{
IVsTextView view = GetActiveTextView();
if (view == null)
{
return(null);
}
try
{
IWpfTextView textView = GetTextViewFromVsTextView(view);
if (textView == null || TextStructureNavigatorSelectorService == null)
{
return(null);
}
ITextStructureNavigator textStructureNavigator = TextStructureNavigatorSelectorService.GetTextStructureNavigator(textView.TextBuffer);
string column = GetCaretWord(textView, textStructureNavigator);
// Note: GetCaretColumn returns 0-based positions. Guidelines are 1-based
// positions.
// However, do not subtract one here since the caret is positioned to the
// left of
// the given column and the guidelines are positioned to the right. We
// want the
// guideline to line up with the current caret position. e.g. When the
// caret is
// at position 1 (zero-based), the status bar says column 2. We want to
// add a
// guideline for column 1 since that will place the guideline where the
// caret is.
return(column);
}
catch (InvalidOperationException)
{
return(null);
}
}
public override void AugmentCompletionSession(ICompletionSession session, IList <CompletionSet> completionSets)
{
if (session == null || completionSets == null)
{
return;
}
ITrackingPoint triggerPoint = session.GetTriggerPoint(TextBuffer);
if (triggerPoint != null)
{
IntellisenseController controller = GetControllerForView(session.TextView);
CompletionInfo completionInfo = controller.CompletionInfo;
ITextSnapshot snapshot = triggerPoint.TextBuffer.CurrentSnapshot;
SnapshotPoint point = triggerPoint.GetPoint(snapshot);
bool extendLeft = false;
bool extend = true;
// labels includes both implicit and explicit labels
var labels = FindLabelsInScope(point);
IntellisenseInvocationType invocationType = completionInfo.InvocationType;
CompletionInfoType infoType = completionInfo.InfoType;
switch (invocationType)
{
case IntellisenseInvocationType.Default:
extend = infoType == CompletionInfoType.GlobalInfo;
break;
case IntellisenseInvocationType.BackspaceDeleteOrBackTab:
case IntellisenseInvocationType.IdentifierChar:
case IntellisenseInvocationType.Sharp:
case IntellisenseInvocationType.Space:
case IntellisenseInvocationType.ShowMemberList:
break;
default:
extendLeft = true;
break;
}
TextExtent extentOfWord = default(TextExtent);
if (extend)
{
ITextBuffer textBuffer = TextBuffer;
ITextStructureNavigator navigator = TextStructureNavigatorSelectorService.CreateTextStructureNavigator(textBuffer, textBuffer.ContentType);
SnapshotPoint currentPosition = new SnapshotPoint(snapshot, triggerPoint.GetPosition(snapshot));
extentOfWord = navigator.GetExtentOfWord(currentPosition);
if (extentOfWord.Span.Start == point)
{
TextExtent extentOfPreviousWord = navigator.GetExtentOfWord(currentPosition - 1);
if (extentOfPreviousWord.IsSignificant && extentOfPreviousWord.Span.End == point && IsCompletionPrefix(extentOfPreviousWord))
{
extentOfWord = extentOfPreviousWord;
}
else
{
extend = false;
}
}
}
if (!extend || !extentOfWord.IsSignificant)
{
SnapshotSpan span = new SnapshotSpan(point, 0);
extentOfWord = new TextExtent(span, false);
}
if (invocationType == IntellisenseInvocationType.BackspaceDeleteOrBackTab && extentOfWord.Span.Length > 0)
{
string str3 = snapshot.GetText(extentOfWord.Span);
if (!string.IsNullOrWhiteSpace(str3))
{
while (CommitCharacters.IndexOf(str3[0]) > 0)
{
SnapshotSpan span2 = extentOfWord.Span;
SnapshotSpan span3 = new SnapshotSpan(snapshot, span2.Start + 1, span2.Length - 1);
extentOfWord = new TextExtent(span3, false);
str3 = snapshot.GetText(extentOfWord.Span);
if (string.IsNullOrEmpty(str3))
{
break;
}
}
}
else
{
SnapshotSpan span4 = new SnapshotSpan(snapshot, extentOfWord.Span.End, 0);
extentOfWord = new TextExtent(span4, false);
completionInfo.InvocationType = IntellisenseInvocationType.Default;
}
}
if (completionInfo.InfoType == CompletionInfoType.AutoListMemberInfo && extentOfWord.Span.GetText().StartsWith("$") && labels.Count == 0)
{
session.Dismiss();
return;
}
ITrackingSpan applicableTo = snapshot.CreateTrackingSpan(extentOfWord.Span, SpanTrackingMode.EdgeInclusive, TrackingFidelityMode.Forward);
if (extendLeft)
{
SnapshotSpan textSoFarSpan = new SnapshotSpan(snapshot, extentOfWord.Span.Start, triggerPoint.GetPoint(snapshot));
string textSoFar = textSoFarSpan.GetText();
applicableTo = snapshot.CreateTrackingSpan(point.Position - textSoFar.Length, textSoFar.Length, SpanTrackingMode.EdgeInclusive, TrackingFidelityMode.Forward);
}
IEnumerable <Completion> context = GetContextCompletions(triggerPoint.GetPoint(snapshot), (AntlrIntellisenseController)controller, session);
IEnumerable <Completion> keywords = GetKeywordCompletions();
IEnumerable <Completion> snippets = GetSnippetCompletions();
IEnumerable <Completion> labelCompletions = GetLabelCompletions(labels);
//SnapshotSpan? Provider.IntellisenseCache.GetExpressionSpan(triggerPoint.GetPoint(snapshot));
IEnumerable <Completion> completions = context.Concat(keywords).Concat(snippets).Concat(labelCompletions);
IEnumerable <Completion> orderedCompletions = completions.Distinct(CompletionDisplayNameComparer.CurrentCulture).OrderBy(i => i.DisplayText, StringComparer.CurrentCultureIgnoreCase);
CompletionSet completionSet = new CompletionSet("AntlrCompletions", "Antlr Completions", applicableTo, orderedCompletions, EmptyCompletions);
completionSets.Add(completionSet);
}
}
public override void AugmentCompletionSession(ICompletionSession session, IList <CompletionSet> completionSets)
{
if (session == null || completionSets == null)
{
return;
}
ITrackingPoint triggerPoint = session.GetTriggerPoint(TextBuffer);
if (triggerPoint != null)
{
IntellisenseController controller = null;
CompletionInfo completionInfo = controller.CompletionInfo;
ITextSnapshot snapshot = triggerPoint.TextBuffer.CurrentSnapshot;
SnapshotPoint point = triggerPoint.GetPoint(snapshot);
bool extendLeft = false;
bool extend = true;
switch (completionInfo.InvocationType)
{
case IntellisenseInvocationType.Default:
extend = completionInfo.InfoType == CompletionInfoType.GlobalInfo;
break;
case IntellisenseInvocationType.BackspaceDeleteOrBackTab:
case IntellisenseInvocationType.IdentifierChar:
case IntellisenseInvocationType.Sharp:
case IntellisenseInvocationType.Space:
case IntellisenseInvocationType.ShowMemberList:
break;
default:
extendLeft = true;
break;
}
TextExtent extentOfWord = default(TextExtent);
if (extend)
{
ITextBuffer textBuffer = TextBuffer;
ITextStructureNavigator navigator = TextStructureNavigatorSelectorService.CreateTextStructureNavigator(textBuffer, textBuffer.ContentType);
SnapshotPoint currentPosition = new SnapshotPoint(snapshot, triggerPoint.GetPosition(snapshot));
extentOfWord = navigator.GetExtentOfWord(currentPosition);
if (extentOfWord.Span.Start == point)
{
TextExtent extentOfPreviousWord = navigator.GetExtentOfWord(currentPosition - 1);
if (extentOfPreviousWord.IsSignificant && extentOfPreviousWord.Span.End == point && IsCompletionPrefix(extentOfPreviousWord))
{
extentOfWord = extentOfPreviousWord;
}
else
{
extend = false;
}
}
}
if (!extend || !extentOfWord.IsSignificant)
{
SnapshotSpan span = new SnapshotSpan(point, 0);
extentOfWord = new TextExtent(span, false);
}
if (completionInfo.InvocationType == IntellisenseInvocationType.BackspaceDeleteOrBackTab && extentOfWord.Span.Length > 0)
{
string str3 = snapshot.GetText(extentOfWord.Span);
if (!string.IsNullOrWhiteSpace(str3))
{
while (CommitCharacters.IndexOf(str3[0]) > 0)
{
SnapshotSpan span2 = extentOfWord.Span;
SnapshotSpan span3 = new SnapshotSpan(snapshot, span2.Start + 1, span2.Length - 1);
extentOfWord = new TextExtent(span3, false);
str3 = snapshot.GetText(extentOfWord.Span);
if (string.IsNullOrEmpty(str3))
{
break;
}
}
}
else
{
SnapshotSpan span4 = new SnapshotSpan(snapshot, extentOfWord.Span.End, 0);
extentOfWord = new TextExtent(span4, false);
completionInfo.InvocationType = IntellisenseInvocationType.Default;
}
}
ITrackingSpan applicableTo = snapshot.CreateTrackingSpan(extentOfWord.Span, SpanTrackingMode.EdgeInclusive, TrackingFidelityMode.Forward);
if (extendLeft)
{
SnapshotSpan textSoFarSpan = new SnapshotSpan(snapshot, extentOfWord.Span.Start, triggerPoint.GetPoint(snapshot));
string textSoFar = textSoFarSpan.GetText();
applicableTo = snapshot.CreateTrackingSpan(point.Position - textSoFar.Length, textSoFar.Length, SpanTrackingMode.EdgeInclusive, TrackingFidelityMode.Forward);
}
/* Context Tree
*
* - Global
* - Options
* - Tokens
* - AttributeScope
* - ACTION
* - Named Action
* - ACTION
* - Rule
* - Arguments
* - ARG_ACTION
* - AttributeScope
* - ACTION
* - Named Action
* - ACTION
* - Options
* - Alternative
* - Alternative*
* - Rewrite
* - ACTION
*/
List <Completion> completions = new List <Completion>();
List <Completion> completionBuilders = new List <Completion>();
List <IntellisenseContext> intellisenseContexts = GetIntellisenseContexts(triggerPoint);
foreach (var context in intellisenseContexts)
{
context.AugmentCompletionSession(session, completions, completionBuilders);
}
string moniker = "AntlrCompletions";
string displayName = "ANTLR Completions";
CompletionSet completionSet = new CompletionSet(moniker, displayName, applicableTo, completions, completionBuilders);
completionSets.Add(completionSet);
}
}
