R completion context. Provides information about current document, caret position and other necessary data for the completion engine.
Esempio n. 1
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        /// <summary>
        /// Should this key press trigger a completion session?
        /// </summary>
        public override bool IsTriggerChar(char typedCharacter)
        {
            if (!HasActiveCompletionSession)
            {
                switch (typedCharacter)
                {
                case '$':
                case '@':
                    return(true);

                case ':':
                    return(RCompletionContext.IsCaretInNamespace(TextView));

                case '(':
                    return(RCompletionContext.IsCaretInLibraryStatement(TextView));

                default:
                    if (REditorSettings.ShowCompletionOnFirstChar)
                    {
                        return(Char.IsLetter(typedCharacter) || typedCharacter == '.');
                    }
                    break;
                }
            }

            return(false);
        }
Esempio n. 2
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        /// <summary>
        /// Populates R completion list for a given position
        /// </summary>
        /// <param name="position">Position in R text buffer</param>
        /// <param name="session">Completion session</param>
        /// <param name="completionSets">Completion sets to add to</param>
        /// <param name="ast">Document abstract syntax tree</param>
        internal void PopulateCompletionList(int position, ICompletionSession session, IList <CompletionSet> completionSets, AstRoot ast)
        {
            RCompletionContext context = new RCompletionContext(session, _textBuffer, ast, position);

            bool autoShownCompletion = true;

            if (session.TextView.Properties.ContainsProperty(CompletionController.AutoShownCompletion))
            {
                autoShownCompletion = session.TextView.Properties.GetProperty <bool>(CompletionController.AutoShownCompletion);
            }

            IReadOnlyCollection <IRCompletionListProvider> providers =
                RCompletionEngine.GetCompletionForLocation(context, autoShownCompletion);

            // Position is in R as is the applicable spa, so no need to map down
            Span?applicableSpan = GetApplicableSpan(position, session);

            if (applicableSpan.HasValue)
            {
                ITrackingSpan      trackingSpan = context.TextBuffer.CurrentSnapshot.CreateTrackingSpan(applicableSpan.Value, SpanTrackingMode.EdgeInclusive);
                List <RCompletion> completions  = new List <RCompletion>();
                bool sort = true;

                foreach (IRCompletionListProvider provider in providers)
                {
                    IReadOnlyCollection <RCompletion> entries = provider.GetEntries(context);
                    Debug.Assert(entries != null);

                    if (entries.Count > 0)
                    {
                        completions.AddRange(entries);
                    }
                    sort &= provider.AllowSorting;
                }

                if (sort)
                {
                    completions.Sort(RCompletion.Compare);
                    completions.RemoveDuplicates();
                }

                CompletionSet completionSet = new RCompletionSet(session.TextView.TextBuffer, trackingSpan, completions);
                completionSets.Add(completionSet);
            }
        }
Esempio n. 3
0
        /// <summary>
        /// Should this key press trigger a completion session?
        /// </summary>
        public override bool IsTriggerChar(char typedCharacter)
        {
            if (!HasActiveCompletionSession)
            {
                switch (typedCharacter)
                {
                case '$':
                case '@':
                    return(true);

                case ':':
                    return(RCompletionContext.IsCaretInNamespace(TextView));

                case '(':
                    return(RCompletionContext.IsCaretInLibraryStatement(TextView));

                default:
                    if (REditorSettings.ShowCompletionOnFirstChar)
                    {
                        SnapshotPoint?position = REditorDocument.MapCaretPositionFromView(TextView);
                        if (position.HasValue)
                        {
                            int pos      = position.Value;
                            var snapshot = position.Value.Snapshot;
                            // Trigger on first character
                            if (RTokenizer.IsIdentifierCharacter(typedCharacter) && !char.IsDigit(typedCharacter))
                            {
                                // Ignore if this is not the first character
                                return(pos <= 1 || (pos > 1 && !RTokenizer.IsIdentifierCharacter(snapshot[pos - 2])));
                            }
                        }
                    }
                    break;
                }
            }
            return(false);
        }
Esempio n. 4
0
        /// <summary>
        /// Populates R completion list for a given position
        /// </summary>
        /// <param name="position">Position in R text buffer</param>
        /// <param name="session">Completion session</param>
        /// <param name="completionSets">Completion sets to add to</param>
        /// <param name="ast">Document abstract syntax tree</param>
        internal void PopulateCompletionList(int position, ICompletionSession session, IList<CompletionSet> completionSets, AstRoot ast) {
            RCompletionContext context = new RCompletionContext(session, _textBuffer, ast, position);

            bool autoShownCompletion = true;
            if (session.TextView.Properties.ContainsProperty(CompletionController.AutoShownCompletion))
                autoShownCompletion = session.TextView.Properties.GetProperty<bool>(CompletionController.AutoShownCompletion);

            IReadOnlyCollection<IRCompletionListProvider> providers =
                RCompletionEngine.GetCompletionForLocation(context, autoShownCompletion, _shell);

            // Position is in R as is the applicable spa, so no need to map down
            Span? applicableSpan = GetApplicableSpan(position, session);
            if (applicableSpan.HasValue) {
                ITrackingSpan trackingSpan = context.TextBuffer.CurrentSnapshot.CreateTrackingSpan(applicableSpan.Value, SpanTrackingMode.EdgeInclusive);
                List<RCompletion> completions = new List<RCompletion>();
                bool sort = true;

                foreach (IRCompletionListProvider provider in providers) {
                    IReadOnlyCollection<RCompletion> entries = provider.GetEntries(context);
                    Debug.Assert(entries != null);

                    if (entries.Count > 0) {
                        completions.AddRange(entries);
                    }
                    sort &= provider.AllowSorting;
                }

                if (sort) {
                    completions.Sort(RCompletion.CompareOrdinal);
                    completions.RemoveDuplicates(RCompletion.CompareOrdinal);
                }

                CompletionSet completionSet = new RCompletionSet(session.TextView.TextBuffer, trackingSpan, completions);
                completionSets.Add(completionSet);
            }
        }