/// <summary>
/// Load the topic and display it when selected
/// </summary>
/// <param name="sender">The sender of the event</param>
/// <param name="e">The event arguments</param>
private void tvContent_SelectedItemChanged(object sender, RoutedPropertyChangedEventArgs <object> e)
{
TocEntry t = tvContent.SelectedItem as TocEntry;
if (t != null)
{
try
{
Mouse.OverrideCursor = Cursors.Wait;
// If the file is open in an editor, use its current content
var args = new TopicContentNeededEventArgs(TopicContentNeededEvent, this, t.SourceFile);
if (!String.IsNullOrEmpty(t.SourceFile))
{
base.RaiseEvent(args);
}
txtTitle.Text = t.PreviewerTitle;
fdViewer.Document = converter.ToFlowDocument(t.SourceFile, args.TopicContent);
this.AdjustPageWidth();
// Scroll to the top if not the first time shown
DependencyObject child = fdViewer;
if (VisualTreeHelper.GetChildrenCount(child) != 0)
{
while (!(child is ScrollViewer))
{
child = VisualTreeHelper.GetChild(child as Visual, 0);
}
((ScrollViewer)child).ScrollToHome();
}
}
catch (Exception ex)
{
// If we get here, something went really wrong
MessageBox.Show("Unable to convert topic. Possible converter error. Reason: " +
ex.Message, Constants.AppName, MessageBoxButton.OK, MessageBoxImage.Error);
}
finally
{
Mouse.OverrideCursor = null;
}
if (!isNavigating && !String.IsNullOrEmpty(t.Id))
{
this.RecordHistory(new Uri("link://" + t.Id));
}
}
else
{
txtTitle.Text = null;
fdViewer.Document = null;
}
}
/// <summary>
/// Load the topic and display it when selected
/// </summary>
/// <param name="sender">The sender of the event</param>
/// <param name="e">The event arguments</param>
private void tvContent_SelectedItemChanged(object sender, RoutedPropertyChangedEventArgs<object> e)
{
TocEntry t = tvContent.SelectedItem as TocEntry;
if(t != null)
{
try
{
Mouse.OverrideCursor = Cursors.Wait;
// If the file is open in an editor, use its current content
var args = new TopicContentNeededEventArgs(TopicContentNeededEvent, this, t.SourceFile);
if(!String.IsNullOrEmpty(t.SourceFile))
base.RaiseEvent(args);
txtTitle.Text = t.PreviewerTitle;
fdViewer.Document = converter.ToFlowDocument(t.SourceFile, args.TopicContent);
this.AdjustPageWidth();
// Scroll to the top if not the first time shown
DependencyObject child = fdViewer;
if(VisualTreeHelper.GetChildrenCount(child) != 0)
{
while(!(child is ScrollViewer))
child = VisualTreeHelper.GetChild(child as Visual, 0);
((ScrollViewer)child).ScrollToHome();
}
}
catch(Exception ex)
{
// If we get here, something went really wrong
MessageBox.Show("Unable to convert topic. Possible converter error. Reason: " +
ex.Message, Constants.AppName, MessageBoxButton.OK, MessageBoxImage.Error);
}
finally
{
Mouse.OverrideCursor = null;
}
if(!isNavigating && !String.IsNullOrEmpty(t.Id))
this.RecordHistory(new Uri("link://" + t.Id));
}
else
{
txtTitle.Text = null;
fdViewer.Document = null;
}
}
/// <summary>
/// This is used to get the content of a specific topic file if it is open in an editor so that the
/// current content is displayed for it in the topic previewer control.
/// </summary>
/// <param name="sender">The sender of the event</param>
/// <param name="e">The event arguments</param>
private void ucTopicPreviewer_TopicContentNeeded(object sender, TopicContentNeededEventArgs e)
{
IVsHierarchy hier;
IVsPersistDocData persistDocData;
IVsTextStream srpStream;
IntPtr docData = IntPtr.Zero;
uint itemid, cookie = 0;
int hr = VSConstants.E_FAIL;
IVsRunningDocumentTable rdt = Utility.GetServiceFromPackage<IVsRunningDocumentTable,
SVsRunningDocumentTable>(true);
if(rdt == null)
return;
try
{
// Getting a read lock on the document. This must be released later.
hr = rdt.FindAndLockDocument((uint)_VSRDTFLAGS.RDT_ReadLock, e.TopicFilename, out hier,
out itemid, out docData, out cookie);
if(ErrorHandler.Failed(hr) || docData == IntPtr.Zero)
return;
persistDocData = Marshal.GetObjectForIUnknown(docData) as IVsPersistDocData;
// Try to get the Text lines
IVsTextLines srpTextLines = persistDocData as IVsTextLines;
if(srpTextLines == null)
{
// Try getting a text buffer provider first
IVsTextBufferProvider srpTextBufferProvider = persistDocData as IVsTextBufferProvider;
if(srpTextBufferProvider != null)
hr = srpTextBufferProvider.GetTextBuffer(out srpTextLines);
}
if(ErrorHandler.Succeeded(hr))
{
srpStream = srpTextLines as IVsTextStream;
if(srpStream != null)
{
IVsBatchUpdate srpBatchUpdate = srpStream as IVsBatchUpdate;
if(srpBatchUpdate != null)
ErrorHandler.ThrowOnFailure(srpBatchUpdate.FlushPendingUpdates(0));
int lBufferSize = 0;
hr = srpStream.GetSize(out lBufferSize);
if(ErrorHandler.Succeeded(hr))
{
IntPtr dest = IntPtr.Zero;
try
{
// GetStream() returns Unicode data so we need to double the buffer size
dest = Marshal.AllocCoTaskMem((lBufferSize + 1) * 2);
ErrorHandler.ThrowOnFailure(srpStream.GetStream(0, lBufferSize, dest));
// Get the contents
e.TopicContent = Marshal.PtrToStringUni(dest);
}
finally
{
if(dest != IntPtr.Zero)
Marshal.FreeCoTaskMem(dest);
}
}
}
}
}
finally
{
if(docData != IntPtr.Zero)
Marshal.Release(docData);
if(cookie != 0)
ErrorHandler.ThrowOnFailure(rdt.UnlockDocument((uint)_VSRDTFLAGS.RDT_ReadLock, cookie));
}
}
/// <summary>
/// This is used to get the content of a specific topic file if it is open in an editor so that the
/// current content is displayed for it in the topic previewer control.
/// </summary>
/// <param name="sender">The sender of the event</param>
/// <param name="e">The event arguments</param>
private void ucTopicPreviewer_TopicContentNeeded(object sender, TopicContentNeededEventArgs e)
{
TopicEditorWindow topicEditor;
foreach(IDockContent content in this.DockPanel.Documents)
{
topicEditor = content as TopicEditorWindow;
if(topicEditor != null && topicEditor.Filename.Equals(e.TopicFilename, StringComparison.OrdinalIgnoreCase))
e.TopicContent = topicEditor.FileContent;
}
}