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);
}
internal void UpdateTextRange(ITextRange range)
{
bool rangeStartChanged = RangeStart != range.StartPosition;
bool rangeEndChanged = RangeEnd != range.EndPosition;
bool positionChanged = _range == null || rangeStartChanged;
_range = range.GetClone();
RangeStart = _range.StartPosition;
RangeEnd = _range.EndPosition;
if (rangeStartChanged)
{
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(RangeStart)));
}
if (rangeEndChanged)
{
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(RangeEnd)));
}
if (positionChanged)
{
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(Position)));
}
}
private bool TryCommitSuggestionIntoDocument(ITextRange range, string displayText, Guid id, ITextCharacterFormat format, bool addTrailingSpace = true)
{
// We don't want to set text when the display text doesn't change since it may lead to unexpected caret move.
range.GetText(TextGetOptions.NoHidden, out var existingText);
if (existingText != displayText)
{
range.SetText(TextSetOptions.Unhide, displayText);
}
var formatBefore = range.CharacterFormat.GetClone();
range.CharacterFormat.SetClone(format);
PadRange(range, formatBefore);
range.Link = $"\"{id}\"";
// In some rare case, setting Link can fail. Only observed when interacting with Undo/Redo feature.
if (range.Link != $"\"{id}\"")
{
range.Delete(TextRangeUnit.Story, -1);
return(false);
}
if (addTrailingSpace)
{
var clone = range.GetClone();
clone.Collapse(false);
clone.SetText(TextSetOptions.Unhide, " ");
clone.Collapse(false);
TextDocument.Selection.SetRange(clone.EndPosition, clone.EndPosition);
}
return(true);
}
/// <summary>
/// Pad range with Zero-Width-Spaces.
/// </summary>
/// <param name="range">Range to pad.</param>
/// <param name="format">Character format to apply to the padding.</param>
private static void PadRange(ITextRange range, ITextCharacterFormat format)
{
var startPosition = range.StartPosition;
var endPosition = range.EndPosition + 1;
var clone = range.GetClone();
clone.Collapse(true);
clone.SetText(TextSetOptions.Unhide, "\u200B");
clone.CharacterFormat.SetClone(format);
clone.SetRange(endPosition, endPosition);
clone.SetText(TextSetOptions.Unhide, "\u200B");
clone.CharacterFormat.SetClone(format);
range.SetRange(startPosition, endPosition + 1);
}
/// <summary>
/// Try getting the token associated with a text range.
/// </summary>
/// <param name="range">The range of the token to get.</param>
/// <param name="token">When this method returns, contains the token associated with the specified range; otherwise, it is null.</param>
/// <returns>true if there is a token associated with the text range; otherwise false.</returns>
public bool TryGetTokenFromRange(ITextRange range, out RichSuggestToken token)
{
token = null;
range = range.GetClone();
if (range != null && !string.IsNullOrEmpty(range.Link))
{
lock (_tokensLock)
{
return(_tokens.TryGetValue(range.Link, out token));
}
}
return(false);
}
// 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();
}