public static SpellingError CloneAndTranslateTo(SpellingError error, ITextSnapshot newSnapshot) { var newSpan = error.Span.TranslateTo(newSnapshot, SpanTrackingMode.EdgeExclusive); // We want to only translate the error if the length of the error span did not change (if it did change, it would imply that // there was some text edit inside the error and, therefore, that the error is no longer valid). return((newSpan.Length == error.Span.Length) ? new SpellingError(newSpan, error.AlternateSpellings) : null); }
private void OnBufferChange(object sender, TextContentChangedEventArgs e) { _currentSnapshot = e.After; // Translate all of the old dirty spans to the new snapshot. NormalizedSnapshotSpanCollection newDirtySpans = _dirtySpans.CloneAndTrackTo(e.After, SpanTrackingMode.EdgeInclusive); // Dirty all the spans that changed. foreach (var change in e.Changes) { newDirtySpans = NormalizedSnapshotSpanCollection.Union(newDirtySpans, new NormalizedSnapshotSpanCollection(e.After, change.NewSpan)); } // Translate all the spelling errors to the new snapshot (and remove anything that is a dirty region since we will need to check that again). var oldSpenningErrors = this.Factory.CurrentSnapshot; var newSpellingErrors = new SpellingErrorsSnapshot(this.FilePath, oldSpenningErrors.VersionNumber + 1); // Copy all of the old errors to the new errors unless the error was affected by the text change foreach (var error in oldSpenningErrors.Errors) { Debug.Assert(error.NextIndex == -1); var newError = SpellingError.CloneAndTranslateTo(error, e.After); if (newError != null) { Debug.Assert(newError.Span.Length == error.Span.Length); error.NextIndex = newSpellingErrors.Errors.Count; newSpellingErrors.Errors.Add(newError); } } this.UpdateSpellingErrors(newSpellingErrors); _dirtySpans = newDirtySpans; // Start processing the dirty spans (which no-ops if we're already doing it). if (_dirtySpans.Count != 0) { this.KickUpdate(); } }
private void ToolsSpellingHints_Click(object sender, RoutedEventArgs e) { string hints = string.Empty; SpellingError err = txtData.GetSpellingError(txtData.CaretIndex); if (err != null) { foreach (string s in err.Suggestions) { hints += string.Format("{0}\n", s); } lblSpellingHint.Content = hints; expenderSPelling.IsExpanded = true; } else { lblSpellingHint.Content = string.Empty; } }
public static SpellingError Clone(SpellingError error) { return(new SpellingError(error.Span, error.AlternateSpellings)); }
private void DoUpdate() { // It would be good to do all of this work on a background thread but we can't: // _classifier.GetClassificationSpans() should only be called on the UI thread because some classifiers assume they are called from the UI thread. // Raising the TagsChanged event from the taggers needs to happen on the UI thread (because some consumers might assume it is being raised on the UI thread). // // Updating the snapshot for the factory and calling the sink can happen on any thread but those operations are so fast that there is no point. if ((!_isDisposed) && (_dirtySpans.Count > 0)) { var line = _dirtySpans[0].Start.GetContainingLine(); if (line.Length > 0) { var oldSpellingErrors = this.Factory.CurrentSnapshot; var newSpellingErrors = new SpellingErrorsSnapshot(this.FilePath, oldSpellingErrors.VersionNumber + 1); // Go through the existing errors. If they are on the line we are currently parsing then // copy them to oldLineErrors, otherwise they go to the new errors. var oldLineErrors = new List <SpellingError>(); foreach (var error in oldSpellingErrors.Errors) { Debug.Assert(error.NextIndex == -1); if (line.Extent.Contains(error.Span)) { error.NextIndex = -1; oldLineErrors.Add(error); // Do not clone old error here ... we'll do that later there is no change. } else { error.NextIndex = newSpellingErrors.Errors.Count; newSpellingErrors.Errors.Add(SpellingError.Clone(error)); // We must clone the old error here. } } int expectedErrorCount = newSpellingErrors.Errors.Count + oldLineErrors.Count; bool anyNewErrors = false; var classifications = _classifier.GetClassificationSpans(line.Extent); foreach (var classification in classifications) { if (classification.ClassificationType.IsOfType(PredefinedClassificationTypeNames.Comment) || classification.ClassificationType.IsOfType("xml doc comment - text")) { string text = classification.Span.GetText(); _box.Text = text; int index = 0; while (index < text.Length) { int errorStart = _box.GetNextSpellingErrorCharacterIndex(index, System.Windows.Documents.LogicalDirection.Forward); if (errorStart < 0) { break; } int errorLength = _box.GetSpellingErrorLength(errorStart); if (errorLength > 1) // Ignore any single character misspelling. { var newSpan = new SnapshotSpan(classification.Span.Start + errorStart, errorLength); if (SpellChecker.IsPossibleSpellingError(newSpan)) { var oldError = oldLineErrors.Find((e) => e.Span == newSpan); if (oldError != null) { // There was a spelling error at the same span as the old one so we should be able to just reuse it. oldError.NextIndex = newSpellingErrors.Errors.Count; newSpellingErrors.Errors.Add(SpellingError.Clone(oldError)); // Don't clone the old error yet } else { // Let WPF decide whether or not there are any suggested spellings. var wpfSpellngError = _box.GetSpellingError(errorStart); newSpellingErrors.Errors.Add(new SpellingError(newSpan, new List <string>(wpfSpellngError.Suggestions))); anyNewErrors = true; } } index = errorStart + errorLength; } else { // How can you have a spelling error with a length of 0? Handle it gracefully in any case. index = errorStart + 1; } } } } // This does a deep comparison so we will only do the update if the a different set of errors was discovered compared to what we had previously. // If there were any new errors or if we didn't see all the expected errors then there is a change and we need to update the spelling errors. if (anyNewErrors || (newSpellingErrors.Errors.Count != expectedErrorCount)) { this.UpdateSpellingErrors(newSpellingErrors); } else { // There were no changes so we don't need to update our snapshot. // We have, however, dirtied the old errors by setting their NextIndex property on the assumption that we would be updating the errors. // Revert all those changes. foreach (var error in oldSpellingErrors.Errors) { error.NextIndex = -1; } } } // NormalizedSnapshotSpanCollection.Difference doesn't quite do what we need here. If I have {[5,5), [10,20)} and subtract {[5, 15)} and do a ...Difference, I // end up with {[5,5), [15,20)} (the zero length span at the beginning isn't getting removed). A zero-length span at the end wouldn't be removed but, in this case, // that is the desired behavior (the zero length span at the end could be a change at the beginning of the next line, which we'd want to keep). var newDirtySpans = new List <Span>(_dirtySpans.Count + 1); var extent = line.ExtentIncludingLineBreak; for (int i = 0; (i < _dirtySpans.Count); ++i) { Span s = _dirtySpans[i]; if ((s.End < extent.Start) || (s.Start >= extent.End)) // Intentionally asymmetric { newDirtySpans.Add(s); } else { if (s.Start < extent.Start) { newDirtySpans.Add(Span.FromBounds(s.Start, extent.Start)); } if ((s.End >= extent.End) && (extent.End < line.Snapshot.Length)) { newDirtySpans.Add(Span.FromBounds(extent.End, s.End)); //This could add a zero length span (which is by design since we want to ensure we spell check the next line). } } } _dirtySpans = new NormalizedSnapshotSpanCollection(line.Snapshot, newDirtySpans); if (_dirtySpans.Count == 0) { // We've cleaned up all the dirty spans. _isUpdating = false; } else { // Still more work to do. _uiThreadDispatcher.BeginInvoke(new Action(() => this.DoUpdate()), DispatcherPriority.Background); } } }