Exemple #1
0
 internal ChangeTrackingCheckpoint Append(DocumentChangeEventArgs change)
 {
     Debug.Assert(this.next == null);
     this.next = new ChangeTrackingCheckpoint(this.documentIdentifier, change, unchecked (this.id + 1));
     return(this.next);
 }
Exemple #2
0
        void DoReplace(int offset, int length, string newText, OffsetChangeMap offsetChangeMap)
        {
            if (length == 0 && newText.Length == 0)
            {
                return;
            }

            // trying to replace a single character in 'Normal' mode?
            // for single characters, 'CharacterReplace' mode is equivalent, but more performant
            // (we don't have to touch the anchorTree at all in 'CharacterReplace' mode)
            if (length == 1 && newText.Length == 1 && offsetChangeMap == null)
            {
                offsetChangeMap = OffsetChangeMap.Empty;
            }

            string removedText           = rope.ToString(offset, length);
            DocumentChangeEventArgs args = new DocumentChangeEventArgs(offset, removedText, newText, offsetChangeMap);

            // fire DocumentChanging event
            if (Changing != null)
            {
                Changing(this, args);
            }

            cachedText      = null;        // reset cache of complete document text
            fireTextChanged = true;
            DelayedEvents delayedEvents = new DelayedEvents();

            lock (lockObject) {
                // create linked list of checkpoints, if required
                if (currentCheckpoint != null)
                {
                    currentCheckpoint = currentCheckpoint.Append(args);
                }

                // now update the textBuffer and lineTree
                if (offset == 0 && length == rope.Length)
                {
                    // optimize replacing the whole document
                    rope.Clear();
                    rope.InsertText(0, newText);
                    lineManager.Rebuild();
                }
                else
                {
                    rope.RemoveRange(offset, length);
                    lineManager.Remove(offset, length);
                                        #if DEBUG
                    lineTree.CheckProperties();
                                        #endif
                    rope.InsertText(offset, newText);
                    lineManager.Insert(offset, newText);
                                        #if DEBUG
                    lineTree.CheckProperties();
                                        #endif
                }
            }

            // update text anchors
            if (offsetChangeMap == null)
            {
                anchorTree.HandleTextChange(args.CreateSingleChangeMapEntry(), delayedEvents);
            }
            else
            {
                foreach (OffsetChangeMapEntry entry in offsetChangeMap)
                {
                    anchorTree.HandleTextChange(entry, delayedEvents);
                }
            }

            // raise delayed events after our data structures are consistent again
            delayedEvents.RaiseEvents();

            // fire DocumentChanged event
            if (Changed != null)
            {
                Changed(this, args);
            }
        }