public int Exec(ref Guid pguidCmdGroup, uint nCmdID, uint nCmdexecopt, IntPtr pvaIn, IntPtr pvaOut)
{
if (pguidCmdGroup == VSConstants.VSStd2K)
{
if (nCmdID == (uint)VSConstants.VSStd2KCmdID.INSERTSNIPPET || nCmdID == (uint)VSConstants.VSStd2KCmdID.SURROUNDWITH)
{
IVsTextManager2 textManager = (IVsTextManager2)this.serviceProvider.GetService(typeof(SVsTextManager));
IVsExpansionManager expansionManager;
if (VSConstants.S_OK == textManager.GetExpansionManager(out expansionManager))
{
expansionManager.InvokeInsertionUI(
vsTextView,
this,
GuidList.guidSpringLanguage,
new string[] { "Expansion" },
1,
0,
null,
0,
1,
"Insert Snippet",
string.Empty);
}
return VSConstants.S_OK;
}
if (this.expansionSession != null)
{
// Handle VS Expansion (Code Snippets) keys
if ((nCmdID == (uint)VSConstants.VSStd2KCmdID.TAB))
{
if (expansionSession.GoToNextExpansionField(0) == VSConstants.S_OK)
return VSConstants.S_OK;
}
else if ((nCmdID == (uint)VSConstants.VSStd2KCmdID.BACKTAB))
{
if (expansionSession.GoToPreviousExpansionField() == VSConstants.S_OK)
return VSConstants.S_OK;
}
else if ((nCmdID == (uint)VSConstants.VSStd2KCmdID.RETURN || nCmdID == (uint)VSConstants.VSStd2KCmdID.CANCEL))
{
if (expansionSession.EndCurrentExpansion(0) == VSConstants.S_OK)
{
expansionSession = null;
return VSConstants.S_OK;
}
}
}
// Handle Edit.ListMembers or Edit.CompleteWord commands
if ((nCmdID == (uint)VSConstants.VSStd2KCmdID.SHOWMEMBERLIST ||
nCmdID == (uint)VSConstants.VSStd2KCmdID.COMPLETEWORD))
{
if (completionSession != null)
{
completionSession.Dismiss();
}
ShowCompletion();
return VSConstants.S_OK;
}
// Handle Enter/Tab commit keys
if (completionSession != null && (nCmdID == (uint)VSConstants.VSStd2KCmdID.RETURN || nCmdID == (uint)VSConstants.VSStd2KCmdID.TAB))
{
if (completionSession.SelectedCompletionSet.SelectionStatus.IsSelected)
{
completionSession.Commit();
}
else
{
completionSession.Dismiss();
}
return VSConstants.S_OK;
}
// Handle Code Snippets after pressing the Tab key without completion
if (completionSession == null && (nCmdID == (uint)VSConstants.VSStd2KCmdID.TAB))
{
IVsTextManager2 expansionManager = (IVsTextManager2)this.serviceProvider.GetService(typeof(SVsTextManager));
SnippetsEnumerable snippetsEnumerator = new SnippetsEnumerable(expansionManager, GuidList.guidSpringLanguage);
SnapshotPoint currentPoint = (this.textView.Caret.Position.BufferPosition) - 1;
ITextStructureNavigator navigator = this.textStructureNavigatorSelectorService.GetTextStructureNavigator(this.textView.TextBuffer);
TextExtent extent = navigator.GetExtentOfWord(currentPoint);
string shortcut = this.textView.TextSnapshot.GetText(extent.Span);
// Search a snippet that matched the token text
VsExpansion expansion = snippetsEnumerator.FirstOrDefault(e => e.title == shortcut);
if (expansion.title != null)
{
// Set the location where the snippet will be inserted
int startLine, startColumn, endLine, endColumn;
this.vsTextView.GetCaretPos(out startLine, out endColumn);
startColumn = endColumn - expansion.title.Length;
endLine = startLine;
// Insert the snippet
InsertCodeExpansion(expansion, startLine, startColumn, endLine, endColumn);
return VSConstants.S_OK;
}
}
// Hanlde other keys
if ((nCmdID == (uint)VSConstants.VSStd2KCmdID.TYPECHAR))
{
char typedChar = (char)(ushort)Marshal.GetObjectForNativeVariant(pvaIn);
if (completionSession == null)
{
// Handle trigger keys
// Check if the typed char is a trigger
if (IsTriggerKey(typedChar))
{
var result = this.nextCommandTarget.Exec(pguidCmdGroup, nCmdID, nCmdexecopt, pvaIn, pvaOut);
ShowCompletion();
return result;
}
}
else
{
// Handle commit keys
// Check if the typed char is a commit key
if (IsCommitKey(typedChar))
{
SpringCompletion selectedCompletion = completionSession.SelectedCompletionSet.SelectionStatus.Completion as SpringCompletion;
if (completionSession.SelectedCompletionSet.SelectionStatus.IsSelected &&
selectedCompletion != null && selectedCompletion.Type != null &&
selectedCompletion.Type.Value == SpringCompletionType.Namespace)
{
completionSession.Commit();
}
else
{
completionSession.Dismiss();
}
var result = this.nextCommandTarget.Exec(pguidCmdGroup, nCmdID, nCmdexecopt, pvaIn, pvaOut);
// Check we should trigger completion after comitting the previous session (for example, after typing dot '.')
if (IsTriggerKey(typedChar))
{
ShowCompletion();
}
return result;
}
else
{
var result = this.nextCommandTarget.Exec(pguidCmdGroup, nCmdID, nCmdexecopt, pvaIn, pvaOut);
completionSession.Filter();
return result;
}
}
}
// redo the filter if there is a deletion
if (nCmdID == (uint)VSConstants.VSStd2KCmdID.BACKSPACE ||
nCmdID == (uint)VSConstants.VSStd2KCmdID.DELETE)
{
var result = this.nextCommandTarget.Exec(pguidCmdGroup, nCmdID, nCmdexecopt, pvaIn, pvaOut);
if (completionSession != null && !completionSession.IsDismissed)
{
completionSession.Filter();
}
return result;
}
}
// we haven't handled this command so pass it onto the next target
return this.nextCommandTarget.Exec(pguidCmdGroup, nCmdID, nCmdexecopt, pvaIn, pvaOut);
}
private IEnumerable<SpringCompletion> GetSnippetsCompletions()
{
List<SpringCompletion> completions = new List<SpringCompletion>();
IVsTextManager2 expansionManager = (IVsTextManager2)this.serviceProvider.GetService(typeof(SVsTextManager));
SnippetsEnumerable snippetsEnumerator = new SnippetsEnumerable(expansionManager, GuidList.guidSpringLanguage);
completions.AddRange(snippetsEnumerator.Select(vsExpansion => new SpringCompletion(this.glyphService, vsExpansion)));
completions.Sort();
return completions;
}