internal DictionaryInfo(Uri pathUri, SpellerInterop.ILexicon lexicon)
{
_pathUri = pathUri;
_lexicon = lexicon;
}
private bool EnsureInitialized()
{
if (_spellerInterop != null)
return true;
if (_failedToInit)
return false;
Invariant.Assert(_highlightLayer == null);
Invariant.Assert(_statusTable == null);
try
{
_spellerInterop = new SpellerInterop();
}
catch (DllNotFoundException)
{
_failedToInit = true;
}
catch (EntryPointNotFoundException)
{
_failedToInit = true;
}
if (_failedToInit)
return false;
_highlightLayer = new SpellerHighlightLayer(this);
_statusTable = new SpellerStatusTable(_textEditor.TextContainer.Start, _highlightLayer);
_textEditor.TextContainer.Highlights.AddLayer(_highlightLayer);
//
_spellerInterop.SetContextOption("IsSpellSuggestingMWEs", false);
_spellingReform = (SpellingReform)_textEditor.UiScope.GetValue(SpellCheck.SpellingReformProperty);
return true;
}
// Flags a run of text with an error.
// In two exceptional circumstances we schedule an idle-time callback
// to re-analyze the run instead of marking it:
// - when the caret is within the error text.
// - when an IME composition covers the text.
private void MarkErrorRange(TextMap textMap, SpellerInterop.STextRange sTextRange)
{
ITextPointer errorStart;
ITextPointer errorEnd;
if (sTextRange.Start + sTextRange.Length > textMap.ContentEndOffset)
{
// We found an error that starts in the content but extends into
// the context. This must be a multi-word error.
// For now, ignore it.
//
return;
}
errorStart = textMap.MapOffsetToPosition(sTextRange.Start);
errorEnd = textMap.MapOffsetToPosition(sTextRange.Start + sTextRange.Length);
if (sTextRange.Start < textMap.ContentStartOffset)
{
Invariant.Assert(sTextRange.Start + sTextRange.Length > textMap.ContentStartOffset);
// We've found an error that start in the context and extends into
// the content. This can happen as more text is revealed to the
// speller engine as the caret moves forward.
// E.g., while scanning "avalon's" we flag an error over "avalon",
// ignoring the "'s" because the caret is positioned within that segment.
// Then, the user hits space and now we analyze "'s" along with its
// preceding context "avalon". In this final scan, "avalon's" as a while
// is flagged as an error and we enter this if statement.
// We must mark the range clean before we can mark it dirty.
// _statusTable.MarkErrorRange can only handle clean runs.
_statusTable.MarkCleanRange(errorStart, errorEnd);
}
_statusTable.MarkErrorRange(errorStart, errorEnd);
}
