private ITrackingSpan FindApplicableSpan(ICompletionSession session)
{
// We eventually want to use an ITextStructureNavigator to expand the current point, but
// first we have to teach it what out structure is. For now, we just understand the Rtype
// syntax directly.
////ITextStructureNavigator navigator = this.sourceProvider.NavigatorService.GetTextStructureNavigator(this.textBuffer);
ITextSnapshot snapshot = session.TextView.TextSnapshot;
ITrackingPoint triggerPoint = session.GetTriggerPoint(session.TextView.TextBuffer);
// Look left and right until we're at a contextual break.
SnapshotPoint initialPoint = triggerPoint.GetPoint(snapshot);
SnapshotPoint leftPoint = initialPoint;
SnapshotPoint rightPoint = initialPoint;
ITextSnapshotLine line = leftPoint.GetContainingLine();
// look left...
if (leftPoint > line.Start)
{
leftPoint -= 1;
while (leftPoint > line.Start && CompletionSource.IsTokenTermCharacter(leftPoint.GetChar()))
{
leftPoint -= 1;
}
// If we bailed because of the character, advance back to the right.
if (!CompletionSource.IsTokenTermCharacter(leftPoint.GetChar()))
{
leftPoint += 1;
}
}
// look right...
// In theory, we might need to include spaces that are inside a quoted region, but we don't know if we've
// just added the start-quote and might over-extend the selection. It's safer to be conservative even if
// it means leaving cruft in the buffer... it's easier for the user to delete the extra than to recover it if
// we removed it.
while (rightPoint < line.End && CompletionSource.IsTokenTermCharacter(rightPoint.GetChar()))
{
rightPoint += 1;
}
ITrackingSpan applicableSpan = snapshot.CreateTrackingSpan(
leftPoint,
rightPoint - leftPoint,
SpanTrackingMode.EdgeInclusive);
////System.Diagnostics.Debug.WriteLine("**FindApplicableSpan: final span={0} ('{1}')", applicableSpan, applicableSpan.GetText(leftPoint.Snapshot));
return(applicableSpan);
}
private int HandleTyping(CommandID command, uint options, IntPtr pvIn, IntPtr pvOut)
{
// If we're in an automation function, *don't* trigger anything as a result of typing!
if (VsShellUtilities.IsInAutomationFunction(this.provider.ServiceProvider))
{
return(this.PassThrough(command, options, pvIn, pvOut));
}
System.Diagnostics.Debug.Assert(command.Guid == VSConstants.VSStd2K);
System.Diagnostics.Debug.Assert(command.ID == (int)VSConstants.VSStd2KCmdID.TYPECHAR ||
command.ID == (int)VSConstants.VSStd2KCmdID.RETURN ||
command.ID == (int)VSConstants.VSStd2KCmdID.TAB ||
command.ID == (int)VSConstants.VSStd2KCmdID.BACKSPACE ||
command.ID == (int)VSConstants.VSStd2KCmdID.DELETE);
VSConstants.VSStd2KCmdID commandId = (VSConstants.VSStd2KCmdID)command.ID;
char typedChar = char.MinValue;
// Make sure the input is a typed character before getting it.
if (commandId == VSConstants.VSStd2KCmdID.TYPECHAR)
{
typedChar = (char)(ushort)Marshal.GetObjectForNativeVariant(pvIn);
}
// Check for a commit character, and possibly commit a selection.
if (commandId == VSConstants.VSStd2KCmdID.RETURN ||
commandId == VSConstants.VSStd2KCmdID.TAB ||
(commandId == VSConstants.VSStd2KCmdID.TYPECHAR && !CompletionSource.IsTokenTermCharacter(typedChar)))
{
if (this.session != null && !this.session.IsDismissed)
{
// if the selection is fully selected, commit the current session
if (this.session.SelectedCompletionSet.SelectionStatus.IsSelected)
{
ITrackingSpan applicableSpan = this.session.SelectedCompletionSet.ApplicableTo;
this.session.Commit();
// If we ended with whitespace or '=', trigger another session!
char ch = (applicableSpan.GetEndPoint(applicableSpan.TextBuffer.CurrentSnapshot) - 1).GetChar();
if (char.IsWhiteSpace(ch) || ch == '=')
{
this.TriggerCompletion();
}
return(VSConstants.S_OK); // don't add the commit character to the buffer
}
else
{
// if there is no selection, dismiss the session
this.session.Dismiss();
}
}
}
// pass the command on through to the buffer to allow typing...
int ret = this.PassThrough(command, options, pvIn, pvOut);
if (commandId == VSConstants.VSStd2KCmdID.TYPECHAR && !typedChar.Equals(char.MinValue))
{
// If there is no active session, bring up completion
if (this.session == null || this.session.IsDismissed)
{
this.TriggerCompletion();
}
if (this.session != null && !this.session.IsDismissed)
{
// the completion session is already active, so just filter
this.session.Filter();
}
}
// else if BACKSPACE or DELETE, redo the filter...
else if (commandId == VSConstants.VSStd2KCmdID.BACKSPACE ||
commandId == VSConstants.VSStd2KCmdID.DELETE)
{
if (this.session != null && !this.session.IsDismissed)
{
this.session.Filter();
}
}
return(ret);
}
private void AddValueCompletions(ObjectTree objectTree, StatementNode currentNode, Token <ParserTokenType> token, IEnumerable <PackageItem> contextItems, List <Completion> completions)
{
if (token == null)
{
return;
}
SpewDiagnostics("----- Adding Values for {0}", currentNode.Statement);
var oit = this.GetTypeFromObjectStatement(currentNode);
if (oit == null)
{
return;
}
// Determine the type of the property or attached property we need...
// Look at the tokens prior to the context token.
var tokens = currentNode.Statement.AllTokens;
var lookup = tokens.Take(tokens.IndexOf(token)).Reverse().ToList();
var propToken = lookup.FirstOrDefault(t => t.TokenType == ParserTokenType.PropertyName);
if (propToken == null)
{
return;
}
string propName = propToken.Value;
string attachedObjectName = string.Empty;
string prefix = string.Empty;
var propIndex = lookup.IndexOf(propToken);
var attachedObjectToken = lookup.Skip(propIndex).ElementAtOrDefault(2);
if (attachedObjectToken != null && attachedObjectToken.TokenType == ParserTokenType.AttachedPropertyObject)
{
attachedObjectName = attachedObjectToken.Value;
var prefixToken = lookup.Skip(propIndex).ElementAtOrDefault(4);
if (prefixToken != null && prefixToken.TokenType == ParserTokenType.NamespacePrefix)
{
prefix = prefixToken.Value;
}
}
Type type = null;
if (string.IsNullOrEmpty(attachedObjectName))
{
// normal property...
PropertyInstanceType prop;
if (oit.TryGetProperty(propName, out prop))
{
type = prop.ValueType;
}
}
else
{
// attached property...
string clrNamespace;
AttachedPropertyObjectType attachedObj;
AttachedPropertySetterType setter;
if (this.typeCache.TryGetNamespaceByPrefix(prefix, out clrNamespace) &&
this.typeCache.TryGetAttachedPropertyType(clrNamespace, attachedObjectName, out attachedObj) &&
attachedObj.TryGetPropertySetter(propName, out setter))
{
type = setter.ValueType;
}
}
if (type == null)
{
return;
}
if (type == typeof(string))
{
// We don't show any completions for strings... we can't!
}
else if (type.IsValueType)
{
if (type.IsEnum)
{
foreach (string name in type.GetEnumNames())
{
string valueName = this.FormatName(name);
completions.Add(new Completion(
valueName,
valueName,
string.Format("{0}\n{1} enumeration value", name, type.Name),
this.GetGlyph(StandardGlyphGroup.GlyphGroupValueType, StandardGlyphItem.GlyphItemPublic),
""));
}
}
else
{
// simple type...
if (type == typeof(bool))
{
completions.Add(new Completion("true", "true", null, this.GetGlyph(StandardGlyphGroup.GlyphGroupValueType, StandardGlyphItem.GlyphItemPublic), ""));
completions.Add(new Completion("false", "false", null, this.GetGlyph(StandardGlyphGroup.GlyphGroupValueType, StandardGlyphItem.GlyphItemPublic), ""));
}
else
{
// ?? non-class value types / strings??
// We have to have more than one placeholder, or else VS will auto-fill for us!
string info = string.Format("TODO: Determine values for {0}", type.FullName);
completions.Add(new Completion("fake 1", "???", info, this.GetGlyph(StandardGlyphGroup.GlyphGroupValueType, StandardGlyphItem.GlyphItemPublic), ""));
completions.Add(new Completion("fake 2", "???", info, this.GetGlyph(StandardGlyphGroup.GlyphGroupValueType, StandardGlyphItem.GlyphItemPublic), ""));
}
}
}
else
{
// Handle other classes/interfaces...
// Find all the context items that could fulfill this type...
List <string> usedValues = new List <string>();
foreach (PackageItem item in contextItems)
{
var itemType = item.GetType();
if (itemType.IsOrDerivesFrom(type))
{
// By convention, we know that the first entry is the shortest possible reference,
// and the last one is the longest/most-explicit.
List <string> referenceNames = item.GetReferenceNames().ToList();
// While editing, it's possible to end up with incomplete items that have no names
// at all. In that case, just skip them!
if (referenceNames.Count == 0)
{
continue;
}
string shortest = referenceNames[0];
string longest = referenceNames[referenceNames.Count - 1];
string info = string.Format(
"Reference to {0} object\nshortest reference: {1}\nlongest reference: {2}",
this.FormatName(itemType.Name),
shortest,
longest);
foreach (string referenceName in referenceNames)
{
if (!usedValues.Contains(referenceName))
{
usedValues.Add(referenceName);
// Add quotes if there are any non-token characters in the value.
string insertionText = referenceName;
if (!referenceName.All(c => CompletionSource.IsTokenTermCharacter(c) && c != '"'))
{
insertionText = string.Concat('"', referenceName, '"');
}
completions.Add(new Completion(
referenceName,
insertionText,
info,
this.GetGlyph(StandardGlyphGroup.GlyphGroupValueType, StandardGlyphItem.GlyphItemPublic),
""));
}
}
}
}
}
}