public TextChangeContext(EditorTree editorTree, TextChangeEventArgs change, TextChange pendingChanges)
{
EditorTree = editorTree;
NewStart = change.Start;
OldStart = change.OldStart;
OldLength = change.OldLength;
NewLength = change.NewLength;
OldTextProvider = change.OldText != null ? change.OldText : editorTree.AstRoot.TextProvider;
NewTextProvider = change.NewText != null ? change.NewText : new TextProvider(editorTree.TextBuffer.CurrentSnapshot, partial: true);
PendingChanges = pendingChanges;
TextChange textChange = new TextChange();
textChange.OldRange = this.OldRange;
textChange.OldTextProvider = this.OldTextProvider;
textChange.NewRange = this.NewRange;
textChange.NewTextProvider = this.NewTextProvider;
textChange.Version = this.NewTextProvider.Version;
PendingChanges.Combine(textChange);
}
/// <summary>
/// Converts list of text changes in a text buffer to a collection of
/// changes that are relative one to another.
/// </summary>
/// <param name="changes">Sorted collection of changes</param>
/// <returns>Collection of relative changes</returns>
public static IReadOnlyList<TextChangeEventArgs> ConvertToRelative(this TextContentChangedEventArgs changeInfo) {
IList<ITextChange> changes = changeInfo.Changes;
var list = new List<TextChangeEventArgs>(changes.Count);
ITextChange previousChange = null;
TextProvider oldText = new TextProvider(changeInfo.Before, true);
TextProvider newText = new TextProvider(changeInfo.After, true);
for (int i = 0; i < changes.Count; i++) {
var change = changes[i];
if (previousChange != null) {
if (previousChange.OldEnd > change.OldPosition || previousChange.NewEnd > change.NewPosition)
throw new ArgumentException("List of changes must not overlap", "changes");
}
var textChange = new TextChangeEventArgs(change.NewPosition, change.OldPosition, change.OldLength, change.NewLength, oldText, newText);
list.Add(textChange);
previousChange = change;
}
return list;
}
/// <summary>
/// Tells document that massive change to text buffer is complete. Document will perform full parse,
/// resume tracking of text buffer changes and classification (colorization).
/// </summary>
/// <returns>True if changes were made to the text buffer since call to BeginMassiveChange</returns>
public bool EndMassiveChange() {
bool changed = _editorTree.TreeUpdateTask.TextBufferChangedSinceSuspend;
if (_inMassiveChange == 1) {
var colorizer = ServiceManager.GetService<RClassifier>(TextBuffer);
colorizer?.Resume();
if (changed) {
TextChangeEventArgs textChange =
new TextChangeEventArgs(0, 0, TextBuffer.CurrentSnapshot.Length, 0,
new TextProvider(_editorTree.TextSnapshot, partial: true),
new TextStream(string.Empty));
List<TextChangeEventArgs> textChanges = new List<TextChangeEventArgs>();
textChanges.Add(textChange);
_editorTree.FireOnUpdatesPending(textChanges);
}
_editorTree.TreeUpdateTask.Resume();
MassiveChangeEnded?.Invoke(this, EventArgs.Empty);
}
if (_inMassiveChange > 0) {
_inMassiveChange--;
}
return changed;
}
internal void NotifyTextChange(int start, int oldLength, int newLength) {
TextChangeEventArgs change = new TextChangeEventArgs(start, start, oldLength, newLength);
List<TextChangeEventArgs> changes = new List<TextChangeEventArgs>(1);
changes.Add(change);
NotifyTextChanges(changes);
}
internal void NotifyTextChange(int start, int oldLength, int newLength) {
TextChangeEventArgs change = new TextChangeEventArgs(start, start, oldLength, newLength);
List<TextChangeEventArgs> changes = new List<TextChangeEventArgs>(1);
changes.Add(change);
_astRoot.ReflectTextChanges(changes, new TextProvider(TextBuffer.CurrentSnapshot));
}
