// Token: 0x06007312 RID: 29458 RVA: 0x00210104 File Offset: 0x0020E304
internal static void AttachUndoManager(DependencyObject scope, UndoManager undoManager)
{
if (scope == null)
{
throw new ArgumentNullException("scope");
}
if (undoManager == null)
{
throw new ArgumentNullException("undoManager");
}
if (undoManager != null && undoManager._scope != null)
{
throw new InvalidOperationException(SR.Get("UndoManagerAlreadyAttached"));
}
UndoManager.DetachUndoManager(scope);
scope.SetValue(UndoManager.UndoManagerInstanceProperty, undoManager);
if (undoManager != null)
{
undoManager._scope = scope;
}
undoManager.IsEnabled = true;
}
// Called after raising public events.
//
// If the application interrupted events, this method will temporarily rollback
// the application changes to safely finalize the composition, then restore
// the application changes.
//
// If the application did not interrupt events, restores the original view
// of the document last seen by IMEs.
private void SetFinalDocumentState(UndoManager undoManager, Stack imeChangeStack, int appChangeCount,
int imeSelectionAnchorOffset, int imeSelectionMovingOffset, int appSelectionAnchorOffset, int appSelectionMovingOffset)
{
this.TextSelection.BeginChangeNoUndo();
try
{
bool textChanged = _compositionModifiedByEventListener;
//
// Undo app changes.
//
UndoQuietly(appChangeCount);
//
// Redo IME changes.
//
Stack appRedoStack = undoManager.SetRedoStack(imeChangeStack);
int imeChangeCount = imeChangeStack.Count;
RedoQuietly(imeChangeCount);
// At this point the document should be exactly where the IME left it.
Invariant.Assert(_netCharCount == this.TextContainer.IMECharCount);
if (textChanged)
{
//
// We need to complete the composition before continuing.
//
int completeUnitCount = undoManager.UndoCount;
if (_isComposing)
{
TextParentUndoUnit completeUndoUnit = OpenTextParentUndoUnit();
try
{
CompleteComposition();
}
finally
{
CloseTextParentUndoUnit(completeUndoUnit, (completeUndoUnit.LastUnit != null) ? UndoCloseAction.Commit : UndoCloseAction.Discard);
}
}
completeUnitCount = (undoManager.UndoCount - completeUnitCount);
// Set a flag that informs the event listeners they need
// to pass along change notifications to the IMEs.
_compositionEventState = CompositionEventState.ApplyingApplicationChange;
try
{
//
// Undo the composition complete, if any.
//
UndoQuietly(completeUnitCount);
//
// Undo the remaining IME changes.
//
UndoQuietly(imeChangeCount);
//
// Restore application changes.
//
undoManager.SetRedoStack(appRedoStack);
RedoQuietly(appChangeCount);
// The IME should have received the app change events from preceeding RedoQuietly.
Invariant.Assert(_netCharCount == this.TextContainer.IMECharCount);
// we can't rely on Redo fixing up the selection.
// If the app only modified the selection appChangeCount == 0.
ITextPointer anchor = this.TextContainer.CreatePointerAtOffset(appSelectionAnchorOffset, LogicalDirection.Forward);
ITextPointer moving = this.TextContainer.CreatePointerAtOffset(appSelectionMovingOffset, LogicalDirection.Forward);
this.TextSelection.Select(anchor, moving);
//
// We may have a filtering related composition undo unit on the top
// of the stack and if that's the case we want to merge it with all
// other composition undo units (if present).
//
MergeCompositionUndoUnits();
}
finally
{
// Reset CompositionEventState after Redo operation
_compositionEventState = CompositionEventState.RaisingEvents;
}
}
else
{
// Restore the selection.
ITextPointer anchor = this.TextContainer.CreatePointerAtOffset(imeSelectionAnchorOffset, LogicalDirection.Backward);
ITextPointer moving = this.TextContainer.CreatePointerAtOffset(imeSelectionMovingOffset, LogicalDirection.Backward);
this.TextSelection.Select(anchor, moving);
// Since we just had a composition accepted, we need to merge all
// of its individual units now.
MergeCompositionUndoUnits();
}
}
finally
{
this.TextSelection.EndChange(false /* disableScroll */, true /* skipEvents */);
}
}
//------------------------------------------------------
//
// Internal Methods
//
//------------------------------------------------------
#region Internal Methods
/// <summary>
/// Defines a given FrameworkElement as a scope for undo service.
/// New instance of UndoManager created and attached to this element.
/// </summary>
/// <param name="scope">
/// FrameworkElement to which new instance of UndoManager is attached.
/// </param>
/// <param name="undoManager">
/// </param>
internal static void AttachUndoManager(DependencyObject scope, UndoManager undoManager)
{
if (scope == null)
{
throw new ArgumentNullException("scope");
}
if (undoManager == null)
{
throw new ArgumentNullException("undoManager");
}
if (undoManager is UndoManager && ((UndoManager)undoManager)._scope != null)
{
throw new InvalidOperationException(SR.Get(SRID.UndoManagerAlreadyAttached));
}
// Detach existing instance of undo manager if any
DetachUndoManager(scope);
// Attach the service to the scope via private dependency property
scope.SetValue(UndoManager.UndoManagerInstanceProperty, undoManager);
if (undoManager is UndoManager)
{
Debug.Assert(((UndoManager)undoManager)._scope == null);
((UndoManager)undoManager)._scope = scope;
}
undoManager.IsEnabled = true;
}
// Token: 0x060071A6 RID: 29094 RVA: 0x00207A9C File Offset: 0x00205C9C
public virtual void Close(IParentUndoUnit unit, UndoCloseAction closeAction)
{
if (unit == null)
{
throw new ArgumentNullException("unit");
}
if (this.OpenedUnit == null)
{
throw new InvalidOperationException(SR.Get("UndoNoOpenUnit"));
}
if (this.OpenedUnit != unit)
{
IParentUndoUnit parentUndoUnit = this;
while (parentUndoUnit.OpenedUnit != null && parentUndoUnit.OpenedUnit != unit)
{
parentUndoUnit = parentUndoUnit.OpenedUnit;
}
if (parentUndoUnit.OpenedUnit == null)
{
throw new ArgumentException(SR.Get("UndoUnitNotFound"), "unit");
}
if (parentUndoUnit != this)
{
parentUndoUnit.Close(closeAction);
return;
}
}
UndoManager undoManager = this.TopContainer as UndoManager;
if (closeAction != UndoCloseAction.Commit)
{
if (undoManager != null)
{
undoManager.IsEnabled = false;
}
if (this.OpenedUnit.OpenedUnit != null)
{
this.OpenedUnit.Close(closeAction);
}
if (closeAction == UndoCloseAction.Rollback)
{
this.OpenedUnit.Do();
}
this._openedUnit = null;
if (this.TopContainer is UndoManager)
{
((UndoManager)this.TopContainer).OnNextDiscard();
}
else
{
((IParentUndoUnit)this.TopContainer).OnNextDiscard();
}
if (undoManager != null)
{
undoManager.IsEnabled = true;
return;
}
}
else
{
if (this.OpenedUnit.OpenedUnit != null)
{
this.OpenedUnit.Close(UndoCloseAction.Commit);
}
IParentUndoUnit openedUnit = this.OpenedUnit;
this._openedUnit = null;
this.Add(openedUnit);
this.SetLastUnit(openedUnit);
}
}
//------------------------------------------------------
//
// Internal Methods
//
//------------------------------------------------------
#region Internal Methods
// Allocates an UndoManager for this instance.
// This method should only be called once, but by controls
// that also creates TextEditors and want undo.
internal void EnableUndo(FrameworkElement uiScope)
{
Invariant.Assert(_undoManager == null, SR.Get(SRID.TextContainer_UndoManagerCreatedMoreThanOnce));
_undoManager = new UndoManager();
MS.Internal.Documents.UndoManager.AttachUndoManager(uiScope, _undoManager);
}
