/// <summary>
/// KeyUp Event
/// </summary>
/// <param name="e">KeyEventArgs</param>
protected override void OnPreviewKeyUp(KeyEventArgs e)
{
base.OnPreviewKeyUp(e);
SetWordAtPointer();
SetLastWord();
KeyColourRun();
if ((_isAssistPredictOn == false) && (e.Key == Key.Space)) //need to know key is space so call in KeyUp
{
//save variable names, we for now will just add if last word has $ at the front
if (_haveVariable)
{
if (!_variableNames.Contains(_lastWord))
{
_variableNames.Add(_lastWord);
}
_predictKeyWord = "$";
}
else
{
_predictKeyWord = _lastWord;//see what word we need to predict
}
var trigger = PredictTriggers.Where(s => s.Key == _predictKeyWord);
if (trigger.Any())
{
FilterAssistBoxItemsPredict((e.Key == Key.Space));
return;
}
}
if ((_isAssistKeyWordOn == false) && ((_isAssistPredictOn == false) || _haveVariable) && !string.IsNullOrEmpty(_lastWord) && (e.Key != Key.Space))
{
IEnumerable <string> match;
if (_haveVariable)
{
match = _variableNames.Where(s => s.ToUpper().StartsWith(_lastWord.ToUpper()));
}
else
{
match = KeyWordSource.Where(s => s.ToUpper().StartsWith(_lastWord.ToUpper()));
}
if (match.Any())
{
FilterAssistBoxItemsKeyWord((e.Key == Key.Space));
return;
}
}
if (_isAssistKeyWordOn)
{
FilterAssistBoxItemsKeyWord((e.Key == Key.Space));
}
else if (_isAssistPredictOn)
{
FilterAssistBoxItemsPredict((e.Key == Key.Space));
}
}
/// <summary>
/// Set the colour of the keyword, assume only one word per run when a key word
/// </summary>
/// <param name="run">Run</param>
protected void SetKeyWordColour(Run run)
{
if (KeyWordSource.Contains(run.Text.Trim().ToUpper()))
{
if (run.Foreground != Brushes.Blue)
{
run.Foreground = Brushes.Blue;
run.FontWeight = FontWeights.Bold;
}
}
else
{
if (run.Foreground != Brushes.Black)
{
run.Foreground = Brushes.Black;
run.FontWeight = FontWeights.Normal;
}
}
}
/// <summary>
/// Controller for the KeyWord list control
/// </summary>
/// <param name="haveSpace">bool</param>
private void FilterAssistBoxItemsKeyWord(bool haveSpace)
{
#if DEBUG
//Debug.Print("LastWord in FilterAssistBoxItemsKeyWord= {0}", _lastWord);
#endif
//if a empty last word then kill box
if ((string.IsNullOrEmpty(_lastWord)) || haveSpace || (_wordAtPointer.Length > _lastWord.Length)) //middle of an existing word
{
_assistListBox.Visibility = Visibility.Collapsed;
_isAssistKeyWordOn = false;
return;
}
IEnumerable <string> displayItems;
if (_haveVariable)
{
displayItems = _variableNames.Where(s => s.ToUpper().StartsWith(_lastWord.ToUpper()) && (s.ToUpper() != _lastWord.ToUpper()) && (s.ToUpper() != _wordAtPointer)).OrderBy(s => s);
}
else
{
displayItems = KeyWordSource.Where(s => s.ToUpper().StartsWith(_lastWord) && (s.ToUpper() != _lastWord) && (s.ToUpper() != _wordAtPointer)).OrderBy(s => s);
}
List <string> sortedItems = displayItems.ToList();
sortedItems.Sort();
_assistListBox.ItemsSource = sortedItems;
_assistListBox.SelectedIndex = 0;
if (displayItems.Count() == 0)
{
_assistListBox.Visibility = Visibility.Collapsed;
_isAssistKeyWordOn = false;
}
else if (_assistListBox.Visibility != Visibility.Visible)
{
_isAssistKeyWordOn = true;
_isAssistPredictOn = false; //override predict if on
ResetAssistListBoxLocation(); //set list box position
_assistListBox.Visibility = Visibility.Visible;
}
}
/// <summary>
/// Colour the run if keyword, also splits the run if a key word, so keyword is within a single run
/// </summary>
private void KeyColourRun()
{
int symCount = GetOffsetFromStartDoc(CaretPosition);
Run run = CaretPosition.Parent as Run;
if (!KeyColour) //no colour required
{
if ((run != null) && (run.Foreground != Brushes.Black))
{
run.Foreground = Brushes.Black;
run.FontWeight = FontWeights.Normal;
}
return; //keyword colour turned off, so exit
}
string run1Text = string.Empty;
string run2Text = string.Empty;
string run3Text = string.Empty;
if (run != null)
{
string text = run.Text;
//check if run text is single keyword and if so see if it needs highlight, no need to go through the splitting of runs
//if (KeyWordSource.Contains(text.Trim().ToUpper()))
//{
// SetKeyWordColour(run);
// return;
//}
//more than one word so split if we can
if (KeyWordSource.Contains(_wordAtPointer))
{
TextPointer startLine = run.ContentStart;
int startIdx = startLine.GetOffsetToPosition(_startWord);
int wordLength = _wordAtPointer.Length;
int endIdx = startIdx + wordLength;
if (startIdx > 0)
{
startIdx -= 1; //pick up the character before the word to see if a " "
wordLength += 1; //ditto
string newRuntext = text.Substring(startIdx, wordLength); //pick up the character before the word to see if a " "
if (!char.IsSeparator(newRuntext[0]))
{
return;
}
}
if (startIdx == 0)
{
run1Text = text.Substring(startIdx, wordLength);;
if (text.Length > wordLength)
{
run2Text = text.Substring(endIdx);
}
}
else
{
run1Text = text.Substring(0, startIdx);
run2Text = text.Substring(startIdx, wordLength);
if (text.Length > endIdx)
{
run3Text = text.Substring(endIdx);
}
}
Run run1 = new Run(run1Text);
Run run2 = new Run(run2Text);
SetKeyWordColour(run1);
CaretPosition.Paragraph.Inlines.InsertBefore(run as Inline, run1);
if (!string.IsNullOrEmpty(run2Text))
{
SetKeyWordColour(run2);
CaretPosition.Paragraph.Inlines.InsertBefore(run as Inline, run2);
}
if (!string.IsNullOrEmpty(run3Text))
{
Run run3 = new Run(run3Text);
SetKeyWordColour(run3);
CaretPosition.Paragraph.Inlines.InsertBefore(run as Inline, run3);
}
CaretPosition.Paragraph.Inlines.Remove(run);
}
else
{
SetKeyWordColour(run);
}
}
if (string.IsNullOrEmpty(run2Text))
{
CaretPosition = GetPointerFromStartDocOffset(symCount);
}
}
