public int OnBeforeDocumentWindowShow(uint docCookie, int fFirstShow, IVsWindowFrame pFrame)
{
// Check if this document is in the list of the documents.
if (documents.ContainsKey(docCookie)) {
return VSConstants.S_OK;
}
// Get the information about this document from the RDT.
IVsRunningDocumentTable rdt = provider.GetService(typeof(SVsRunningDocumentTable)) as IVsRunningDocumentTable;
if (null != rdt) {
// Note that here we don't want to throw in case of error.
uint flags;
uint readLocks;
uint writeLoks;
string documentMoniker;
IVsHierarchy hierarchy;
uint itemId;
IntPtr unkDocData;
int hr = rdt.GetDocumentInfo(docCookie, out flags, out readLocks, out writeLoks,
out documentMoniker, out hierarchy, out itemId, out unkDocData);
try {
if (Microsoft.VisualStudio.ErrorHandler.Failed(hr) || (IntPtr.Zero == unkDocData)) {
return VSConstants.S_OK;
}
// Check if the herarchy is one of the hierarchies this service is monitoring.
if (!hierarchies.ContainsKey(hierarchy)) {
// This hierarchy is not monitored, we can exit now.
return VSConstants.S_OK;
}
// Check the extension of the file to see if a listener is required.
string extension = System.IO.Path.GetExtension(documentMoniker);
if (0 != string.Compare(extension, PythonConstants.pythonFileExtension, StringComparison.OrdinalIgnoreCase)) {
return VSConstants.S_OK;
}
// Create the module id for this document.
ModuleId docId = new ModuleId(hierarchy, itemId);
// Try to get the text buffer.
IVsTextLines buffer = Marshal.GetObjectForIUnknown(unkDocData) as IVsTextLines;
// Create the listener.
TextLineEventListener listener = new TextLineEventListener(buffer, documentMoniker, docId);
// Set the event handler for the change event. Note that there is no difference
// between the AddFile and FileChanged operation, so we can use the same handler.
listener.OnFileChanged += new EventHandler<HierarchyEventArgs>(OnNewFile);
// Add the listener to the dictionary, so we will not create it anymore.
documents.Add(docCookie, listener);
} finally {
if (IntPtr.Zero != unkDocData) {
Marshal.Release(unkDocData);
}
}
}
// Always return success.
return VSConstants.S_OK;
}
