102 lines
3.1 KiB
C#
102 lines
3.1 KiB
C#
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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// Copyright (c) Microsoft Corporation. All rights reserved.
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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using System.Collections.Generic;
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using Microsoft.VisualStudio.Language.Intellisense;
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using Microsoft.VisualStudio.Text;
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using Microsoft.VisualStudio.Text.Editor;
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namespace VSLTK.Intellisense
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{
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#region IIntellisenseController
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internal class TemplateQuickInfoController : IIntellisenseController
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{
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#region Private Data Members
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private ITextView _textView;
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private IList<ITextBuffer> _subjectBuffers;
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private TemplateQuickInfoControllerProvider _componentContext;
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private IQuickInfoSession _session;
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#endregion
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#region Constructors
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internal TemplateQuickInfoController(ITextView textView, IList<ITextBuffer> subjectBuffers, TemplateQuickInfoControllerProvider componentContext)
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{
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_textView = textView;
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_subjectBuffers = subjectBuffers;
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_componentContext = componentContext;
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_textView.MouseHover += this.OnTextViewMouseHover;
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}
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#endregion
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#region IIntellisenseController Members
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public void ConnectSubjectBuffer(ITextBuffer subjectBuffer)
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{
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}
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public void DisconnectSubjectBuffer(ITextBuffer subjectBuffer)
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{
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}
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public void Detach(ITextView textView)
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{
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if (_textView == textView)
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{
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_textView.MouseHover -= this.OnTextViewMouseHover;
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_textView = null;
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}
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}
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#endregion
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#region Event Handlers
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private void OnTextViewMouseHover(object sender, MouseHoverEventArgs e)
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{
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SnapshotPoint? point = this.GetMousePosition(new SnapshotPoint(_textView.TextSnapshot, e.Position));
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if (point != null)
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{
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ITrackingPoint triggerPoint = point.Value.Snapshot.CreateTrackingPoint(point.Value.Position,
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PointTrackingMode.Positive);
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// Find the broker for this buffer
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if (!_componentContext.QuickInfoBroker.IsQuickInfoActive(_textView))
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{
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_session = _componentContext.QuickInfoBroker.CreateQuickInfoSession(_textView, triggerPoint, true);
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_session.Start();
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}
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}
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}
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#endregion
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#region Private Implementation
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private SnapshotPoint? GetMousePosition(SnapshotPoint topPosition)
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{
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// Map this point down to the appropriate subject buffer.
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return _textView.BufferGraph.MapDownToFirstMatch
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(
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topPosition,
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PointTrackingMode.Positive,
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snapshot => _subjectBuffers.Contains(snapshot.TextBuffer),
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PositionAffinity.Predecessor
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);
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}
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#endregion
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}
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#endregion
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} |