private void FindAndHighlightText(string textToFind)
{
ClearAllHighlightedWords();
ITextRange searchRange = editor.Document.GetRange(0, TextConstants.MaxUnitCount);
searchRange.Move(0, 0);
bool textFound = true;
do
{
if (searchRange.FindText(textToFind, TextConstants.MaxUnitCount, FindOptions.None) < 1)
{
textFound = false;
}
else
{
ITextRange ss = searchRange.GetClone();
m_highlightedWords.Add(searchRange.GetClone());
ITextCharacterFormat charFormatting = searchRange.CharacterFormat;
charFormatting.BackgroundColor = Colors.Yellow;
searchRange.CharacterFormat = charFormatting;
}
} while (textFound);
}
// 高亮显示用户搜索的字符
private void btnSearch_Click(object sender, RoutedEventArgs e)
{
// 清除高亮字符的高亮效果
ITextCharacterFormat charFormat;
for (int i = 0; i < _highlightedWords.Count; i++)
{
charFormat = _highlightedWords[i].CharacterFormat;
charFormat.BackgroundColor = Colors.Transparent;
_highlightedWords[i].CharacterFormat = charFormat;
}
_highlightedWords.Clear();
// 获取全部文本，并将操作点移动到文本的起点
ITextRange searchRange = txtEditor.Document.GetRange(0, TextConstants.MaxUnitCount);
searchRange.Move(0, 0);
bool textFound = true;
do
{
// 在全部文本中搜索指定的字符串
if (searchRange.FindText(txtSearch.Text, TextConstants.MaxUnitCount, FindOptions.None) < 1)
{
textFound = false;
}
else
{
_highlightedWords.Add(searchRange.GetClone());
// 实体化一个 ITextCharacterFormat，指定字符背景颜色为黄色
ITextCharacterFormat charFormatting = searchRange.CharacterFormat;
charFormatting.BackgroundColor = Colors.Orange;
// 设置指定文本的字符格式（高亮效果）
searchRange.CharacterFormat = charFormatting;
}
} while (textFound);
}
private async Task ShowCompletionListAsync()
{
if (ViewModel.CodeEditor is null)
{
return;
}
ITextRange range = CodeEditor.Document.Selection;
if (range.Length < 0)
{
range.EndPosition = range.StartPosition;
}
else
{
range.StartPosition = range.EndPosition;
}
TextSpan selectionSpan = GetAdjustedTextSpan(TextSpan.FromBounds(range.StartPosition, range.EndPosition), ViewModel.CurrentText, ViewModel.NewLineMode, true);
CompletionList?completionList = await ViewModel.GetCompletionListAsync(selectionSpan.Start);
if (completionList != null)
{
bool expandsToWord = true;
ITextRange wordRange = range.GetClone();
if (wordRange.Character == '\r')
{
ITextRange wordRangeClone = range.GetClone();
wordRangeClone.Move(TextRangeUnit.Word, -1);
expandsToWord = IsValidCSharpIdentifierCharacter(wordRangeClone.Character);
}
if (expandsToWord)
{
wordRange.Move(TextRangeUnit.Word, -1);
wordRange.MoveEnd(TextRangeUnit.Word, 1);
}
string word = wordRange.Text.Trim();
var completionItems = ViewModel.FilterCompletionItems(completionList.Items, word);
CompletionListFlyout.Items.Clear();
foreach (CompletionItem item in completionItems)
{
var properties = item.Properties;
if (properties.TryGetValue("SymbolName", out string symbolName))
{
MenuFlyoutItem menuFlyoutItem = new MenuFlyoutItem
{
Text = symbolName
};
menuFlyoutItem.Click += async(s, e) =>
{
CompletionChange?completionChange = await ViewModel.GetCompletionChangeAsync(item);
if (completionChange != null)
{
TextSpan span = GetAdjustedTextSpan(completionChange.TextChange.Span, ViewModel.CurrentText, ViewModel.NewLineMode);
CodeEditor.Document.Selection.StartPosition = span.Start;
CodeEditor.Document.Selection.EndPosition = span.End;
CodeEditor.Document.Selection.TypeText(completionChange.TextChange.NewText);
}
};
CompletionListFlyout.Items.Add(menuFlyoutItem);
}
}
if (CompletionListFlyout.Items.Count > 0)
{
Point flyoutPosition = GetAdjustedPointFromDocument(range);
flyoutPosition = new Point(flyoutPosition.X + 12, flyoutPosition.Y + 8);
CompletionListFlyout.ShowAt(CodeEditor, new FlyoutShowOptions {
Position = flyoutPosition, ShowMode = FlyoutShowMode.Transient
});
return;
}
}
CompletionListFlyout.Hide();
}