/// <summary>
/// Update the new selection. This is called by rule formula view when selection changes.
/// </summary>
/// <param name="vwselNew">The new selection.</param>
private void UpdateSelection(IVwSelection vwselNew)
{
CheckDisposed();
SelectionHelper sel = SelectionHelper.Create(vwselNew, this);
if (sel != null)
{
object ctxt = m_patternControl.GetContext(sel);
// if context is null then we are trying to select outside of a single context
if (ctxt == null)
{
if (sel.IsRange)
{
// ensure that a range selection only occurs within one context
object topCtxt = m_patternControl.GetContext(sel, SelectionHelper.SelLimitType.Top);
object bottomCtxt = m_patternControl.GetContext(sel, SelectionHelper.SelLimitType.Bottom);
var limit = SelectionHelper.SelLimitType.Top;
if (topCtxt != null)
{
limit = SelectionHelper.SelLimitType.Top;
ctxt = topCtxt;
}
else if (bottomCtxt != null)
{
limit = SelectionHelper.SelLimitType.Bottom;
ctxt = bottomCtxt;
}
if (ctxt != null)
{
IVwSelection newSel = SelectCell(ctxt, limit == SelectionHelper.SelLimitType.Bottom, false);
sel.ReduceToIp(limit);
IVwSelection otherSel = sel.SetSelection(this, false, false);
if (sel.Selection.EndBeforeAnchor)
{
RootBox.MakeRangeSelection(limit == SelectionHelper.SelLimitType.Top ? newSel : otherSel,
limit == SelectionHelper.SelLimitType.Top ? otherSel : newSel, true);
}
else
{
RootBox.MakeRangeSelection(limit == SelectionHelper.SelLimitType.Top ? otherSel : newSel,
limit == SelectionHelper.SelLimitType.Top ? newSel : otherSel, true);
}
}
}
}
else
{
AdjustSelection(sel);
}
}
}
/// <summary>
/// Handle the CommitText event. Transfer to GUI thread if neccessary.
/// </summary>
private void CommitTextEventHandler(string text)
{
if (AssociatedSimpleRootSite.InvokeRequired)
{
AssociatedSimpleRootSite.SafeBeginInvoke(
new CommitDelegate(CommitTextEventHandler), new object[] { text });
return;
}
IActionHandler actionHandler = AssociatedSimpleRootSite.DataAccess.GetActionHandler();
try
{
if (actionHandler != null)
{
actionHandler.BeginUndoTask(Resources.ksUndoTyping, Resources.ksRedoTyping);
}
// Save existing Preedit Selection and existing left-over preedit string.
var preeditSelection = SavePreeditSelection();
ITsString preedit;
preeditSelection.Selection.GetSelectionString(out preedit, String.Empty);
// Change selection to a insertion point (unless we moved the selection before,
// which happens when we come here as part of processing a mouse click)
// And insert commit text.
var selHelper = new SelectionHelper(
m_savedPreeditSelection ?? AssociatedSimpleRootSite.EditingHelper.CurrentSelection);
if (m_savedPreeditSelection == null)
{
selHelper.ReduceToIp(SelectionHelper.SelLimitType.Anchor);
}
selHelper.SetSelection(true);
AssociatedSimpleRootSite.EditingHelper.OnCharAux(text, VwShiftStatus.kfssNone,
Keys.None);
int deletedChars = TrimBeginningBackspaces(ref text);
// Update the saved preedit selection to take account of the inserted text
// text is in NFC, but the view uses it in NFD, so we have to convert it.
// We don't do this if we moved the selection prior to this method.
int textLenNFD = m_savedPreeditSelection != null ? 0 :
Icu.Normalize(text, Icu.UNormalizationMode.UNORM_NFD).Length;
int anchor = preeditSelection.IchAnchor + textLenNFD - deletedChars;
// select the text we just inserted
// TODO: underline the text so that it is more obvious that this is just preedit text
preeditSelection.SetIch(SelectionHelper.SelLimitType.Anchor, anchor);
preeditSelection.SetIch(SelectionHelper.SelLimitType.End,
preeditSelection.IchEnd + textLenNFD - deletedChars);
// reshow the preedit selection
RestorePreeditSelection(preeditSelection);
preeditSelection.Selection.ReplaceWithTsString(preedit);
preeditSelection.SetSelection(true);
}
finally
{
m_savedPreeditSelection = null;
if (actionHandler != null)
{
actionHandler.EndUndoTask();
}
}
}