public static string GetWordAtIndex(this ITextDocument document, int index)
{
var result = string.Empty;
if (index >= 0 && document.TextLength > index)
{
var start = index;
var currentChar = document.GetCharAt(index);
var prevChar = '\0';
if (index > 0)
{
prevChar = document.GetCharAt(index - 1);
}
var charClass = TextUtilities.GetCharacterClass(currentChar);
if (charClass != CharacterClass.LineTerminator && prevChar != ' ' && TextUtilities.GetCharacterClass(prevChar) != CharacterClass.LineTerminator)
{
start = TextUtilities.GetNextCaretPosition(document, index, LogicalDirection.Backward, CaretPositioningMode.WordStart);
}
var end = TextUtilities.GetNextCaretPosition(document, start, LogicalDirection.Forward, CaretPositioningMode.WordBorder);
if (start != -1 && end != -1)
{
var word = document.GetText(start, end - start).Trim();
if (word.IsSymbol())
{
result = word;
}
}
}
return(result);
}
static void ConvertVerbatimStringToNormal(ITextDocument textEditorData, int offset)
{
var endOffset = offset;
while (endOffset < textEditorData.Length)
{
char ch = textEditorData.GetCharAt(endOffset);
if (ch == '"' && (endOffset + 1 < textEditorData.Length && textEditorData.GetCharAt(endOffset + 1) == '"'))
{
endOffset += 2;
continue;
}
if (ch == '"')
{
break;
}
endOffset++;
}
var plainText = CSharpTextPasteHandler.TextPasteUtils.VerbatimStringStrategy.Decode(textEditorData.GetTextAt(offset, endOffset - offset));
var newText = CSharpTextPasteHandler.TextPasteUtils.StringLiteralPasteStrategy.Instance.Encode(plainText);
textEditorData.ReplaceText(offset, endOffset - offset, newText);
}
static void ConvertNormalToVerbatimString(ITextDocument textEditorData, int offset)
{
var endOffset = offset;
while (endOffset < textEditorData.Length)
{
char ch = textEditorData.GetCharAt(endOffset);
if (ch == '\\')
{
if (endOffset + 1 < textEditorData.Length && NewLine.IsNewLine(textEditorData.GetCharAt(endOffset + 1)))
{
return;
}
endOffset += 2;
continue;
}
if (ch == '"')
{
break;
}
if (NewLine.IsNewLine(ch))
{
return;
}
endOffset++;
}
if (offset > endOffset || endOffset == textEditorData.Length)
{
return;
}
var plainText = CSharpTextPasteHandler.TextPasteUtils.StringLiteralPasteStrategy.Instance.Decode(textEditorData.GetTextAt(offset, endOffset - offset));
var newText = CSharpTextPasteHandler.TextPasteUtils.VerbatimStringStrategy.Encode(plainText);
textEditorData.ReplaceText(offset, endOffset - offset, newText);
}
public static ISegment GetToken(this ITextDocument document, int offset)
{
var result = string.Empty;
if (offset >= 0 && document.TextLength > offset)
{
var start = offset;
var currentChar = document.GetCharAt(offset);
var prevChar = '\0';
if (offset > 0)
{
prevChar = document.GetCharAt(offset - 1);
}
var charClass = AvaloniaEdit.Document.TextUtilities.GetCharacterClass(currentChar);
if (charClass != AvaloniaEdit.Document.CharacterClass.LineTerminator && prevChar != ' ' &&
AvaloniaEdit.Document.TextUtilities.GetCharacterClass(prevChar) != AvaloniaEdit.Document.CharacterClass.LineTerminator)
{
start = TextUtilities.GetNextCaretPosition(document, offset, LogicalDirection.Backward,
CaretPositioningMode.WordStart);
}
var end = TextUtilities.GetNextCaretPosition(document, start, LogicalDirection.Forward,
CaretPositioningMode.WordBorder);
if (start >= 0 && end >= 0 && end < document.TextLength && end >= start)
{
return(new SimpleSegment(start, end - start));
}
}
return(null);
}
public static int GetIntellisenseStartPosition(this ITextDocument textSource, int offset, Predicate <char> isValidChar)
{
while (true)
{
var currentChar = textSource.GetCharAt(offset - 1);
if (!isValidChar(currentChar) || offset < 0)
{
break;
}
offset--;
}
return(offset);
}
public static (int index, char character) GetLastNonWhiteSpaceCharBefore(this ITextDocument textSource, int index, int minIndex = 0)
{
while (index >= minIndex)
{
var currentChar = textSource.GetCharAt(index);
if (!char.IsWhiteSpace(currentChar))
{
return(index, currentChar);
}
index--;
}
return(-1, '\0');
}
public static ISegment GetWhitespaceBefore(this ITextDocument textSource, int offset)
{
if (textSource == null)
{
throw new ArgumentNullException(nameof(textSource));
}
int pos;
for (pos = offset - 1; pos >= 0; pos--)
{
char c = textSource.GetCharAt(pos);
if (c != ' ' && c != '\t')
{
break;
}
}
pos++; // go back the one character that isn't whitespace
return(new SimpleSegment(pos, offset - pos));
}
public static ISegment GetWhitespaceAfter(this ITextDocument textSource, int offset)
{
if (textSource == null)
{
throw new ArgumentNullException(nameof(textSource));
}
int pos;
for (pos = offset; pos < textSource.TextLength; pos++)
{
char c = textSource.GetCharAt(pos);
if (c != ' ' && c != '\t')
{
break;
}
}
return(new SimpleSegment(offset, pos - offset));
}
private void OpenBracket(IEditor editor, ITextDocument document, string text)
{
if (text[0].IsOpenBracketChar() && editor.CaretOffset <= document.TextLength && editor.CaretOffset > 0)
{
var nextChar = ' ';
if (editor.CaretOffset != document.TextLength)
{
nextChar = document.GetCharAt(editor.CaretOffset);
}
var location = document.GetLocation(editor.CaretOffset);
if (char.IsWhiteSpace(nextChar) || nextChar.IsCloseBracketChar())
{
if (text[0] == '{')
{
var offset = editor.CaretOffset;
document.Insert(editor.CaretOffset, " " + text[0].GetCloseBracketChar().ToString() + " ");
if (IndentationStrategy != null)
{
editor.IndentLine(editor.Line);
}
editor.CaretOffset = offset + 1;
}
else
{
var offset = editor.CaretOffset;
document.Insert(editor.CaretOffset, text[0].GetCloseBracketChar().ToString());
editor.CaretOffset = offset;
}
}
}
}
public static (int index, char character) GetLastCharMatching(this ITextDocument textSource, Predicate <char> predicate, int startIndex, int minIndex = 0, int skip = 0)
{
while (startIndex >= minIndex)
{
var currentChar = textSource.GetCharAt(startIndex);
if (predicate(currentChar))
{
if (skip == 0)
{
return(startIndex, currentChar);
}
else
{
skip--;
}
}
startIndex--;
}
return(-1, '\0');
}
private void CloseBracket(IEditor editor, ITextDocument document, string text)
{
if (text[0].IsCloseBracketChar() && editor.CaretOffset < document.TextLength && editor.CaretOffset > 0)
{
var offset = editor.CaretOffset;
while (offset < document.TextLength)
{
var currentChar = document.GetCharAt(offset);
if (currentChar == text[0])
{
document.Replace(offset, 1, string.Empty);
break;
}
else if (!currentChar.IsWhiteSpace())
{
break;
}
offset++;
}
}
}
public static int GetNextCaretPosition(ITextDocument textSource, int offset, LogicalDirection direction, CaretPositioningMode mode)
{
if (textSource == null)
{
throw new ArgumentNullException(nameof(textSource));
}
switch (mode)
{
case CaretPositioningMode.Normal:
case CaretPositioningMode.EveryCodepoint:
case CaretPositioningMode.WordBorder:
case CaretPositioningMode.WordBorderOrSymbol:
case CaretPositioningMode.WordStart:
case CaretPositioningMode.WordStartOrSymbol:
break; // OK
default:
throw new ArgumentException("Unsupported CaretPositioningMode: " + mode, nameof(mode));
}
if (direction != LogicalDirection.Backward &&
direction != LogicalDirection.Forward)
{
throw new ArgumentException("Invalid LogicalDirection: " + direction, nameof(direction));
}
int textLength = textSource.TextLength;
if (textLength <= 0)
{
// empty document? has a normal caret position at 0, though no word borders
if (IsNormal(mode))
{
if (offset > 0 && direction == LogicalDirection.Backward)
{
return(0);
}
if (offset < 0 && direction == LogicalDirection.Forward)
{
return(0);
}
}
return(-1);
}
while (true)
{
int nextPos = (direction == LogicalDirection.Backward) ? offset - 1 : offset + 1;
// return -1 if there is no further caret position in the text source
// we also need this to handle offset values outside the valid range
if (nextPos < 0 || nextPos > textLength)
{
return(-1);
}
// check if we've run against the textSource borders.
// a 'textSource' usually isn't the whole document, but a single VisualLineElement.
if (nextPos == 0)
{
// at the document start, there's only a word border
// if the first character is not whitespace
if (IsNormal(mode) || !char.IsWhiteSpace(textSource.GetCharAt(0)))
{
return(nextPos);
}
}
else if (nextPos == textLength)
{
// at the document end, there's never a word start
if (mode != CaretPositioningMode.WordStart && mode != CaretPositioningMode.WordStartOrSymbol)
{
// at the document end, there's only a word border
// if the last character is not whitespace
if (IsNormal(mode) || !char.IsWhiteSpace(textSource.GetCharAt(textLength - 1)))
{
return(nextPos);
}
}
}
else
{
char charBefore = textSource.GetCharAt(nextPos - 1);
char charAfter = textSource.GetCharAt(nextPos);
// Don't stop in the middle of a surrogate pair
if (!char.IsSurrogatePair(charBefore, charAfter))
{
CharacterClass classBefore = GetCharacterClass(charBefore);
CharacterClass classAfter = GetCharacterClass(charAfter);
// get correct class for characters outside BMP:
if (char.IsLowSurrogate(charBefore) && nextPos >= 2)
{
classBefore = GetCharacterClass(textSource.GetCharAt(nextPos - 2), charBefore);
}
if (char.IsHighSurrogate(charAfter) && nextPos + 1 < textLength)
{
classAfter = GetCharacterClass(charAfter, textSource.GetCharAt(nextPos + 1));
}
if (StopBetweenCharacters(mode, classBefore, classAfter))
{
return(nextPos);
}
}
}
// we'll have to continue searching...
offset = nextPos;
}
}
static void ConvertVerbatimStringToNormal (ITextDocument textEditorData, int offset)
{
var endOffset = offset;
while (endOffset < textEditorData.Length) {
char ch = textEditorData.GetCharAt (endOffset);
if (ch == '"' && (endOffset + 1 < textEditorData.Length && textEditorData.GetCharAt (endOffset + 1) == '"')) {
endOffset += 2;
continue;
}
if (ch == '"') {
break;
}
endOffset++;
}
var plainText = TextPasteUtils.VerbatimStringStrategy.Decode (textEditorData.GetTextAt (offset, endOffset - offset));
var newText = TextPasteUtils.StringLiteralPasteStrategy.Instance.Encode (plainText);
textEditorData.ReplaceText (offset, endOffset - offset, newText);
}
static void ConvertNormalToVerbatimString (ITextDocument textEditorData, int offset)
{
var endOffset = offset;
while (endOffset < textEditorData.Length) {
char ch = textEditorData.GetCharAt (endOffset);
if (ch == '\\') {
if (endOffset + 1 < textEditorData.Length && NewLine.IsNewLine (textEditorData.GetCharAt (endOffset + 1)))
return;
endOffset += 2;
continue;
}
if (ch == '"')
break;
if (NewLine.IsNewLine (ch))
return;
endOffset++;
}
if (offset > endOffset || endOffset == textEditorData.Length)
return;
var plainText = TextPasteUtils.StringLiteralPasteStrategy.Instance.Decode (textEditorData.GetTextAt (offset, endOffset - offset));
var newText = TextPasteUtils.VerbatimStringStrategy.Encode (plainText);
textEditorData.ReplaceText (offset, endOffset - offset, newText);
}
static void ResortImports(List <ImportStatement> importsToSort, ITextDocument editor, List <DAttribute> attributesNotToWrite, bool separatePackageRoots)
{
if (importsToSort.Count < 2)
{
return;
}
int firstOffset = int.MaxValue;
string indent = "";
// Remove all of them from the document; Memorize where the first import was
for (int i = importsToSort.Count - 1; i >= 0; i--)
{
var ss = importsToSort[i];
var ssLocation = ss.Location;
var ssEndLocation = ss.EndLocation;
DAttribute attr;
if (ss.Attributes != null && ss.Attributes.Length > 0)
{
attr = ss.Attributes.FirstOrDefault((e) => !attributesNotToWrite.Contains(e));
if (attr != null && attr.Location < ssLocation)
{
ssLocation = attr.Location;
}
attr = ss.Attributes.LastOrDefault((e) => !attributesNotToWrite.Contains(e));
if (attr != null && attr.EndLocation > ssEndLocation)
{
ssEndLocation = attr.EndLocation;
}
}
var l1 = editor.LocationToOffset(ssLocation.Line, ssLocation.Column);
var l2 = editor.LocationToOffset(ssEndLocation.Line, ssEndLocation.Column);
var n = editor.Length - 1;
// Remove indents and trailing semicolon.
for (char c; l1 > 0 && ((c = editor.GetCharAt(l1 - 1)) == ' ' || c == '\t'); l1--)
{
;
}
for (char c; l2 < n && ((c = editor.GetCharAt(l2 + 1)) == ' ' || c == '\t' || c == ';'); l2++)
{
;
}
for (char c; l2 < n && ((c = editor.GetCharAt(l2 + 1)) == '\n' || c == '\r'); l2++)
{
;
}
l1 = Math.Max(0, l1);
l2 = Math.Max(0, l2);
firstOffset = Math.Min(l1, firstOffset);
indent = editor.GetLineIndent(editor.OffsetToLineNumber(firstOffset));
editor.Remove(l1, l2 - l1);
}
// Sort
importsToSort.Sort(new ImportComparer());
// Write all imports beneath each other.
var eol = editor.EolMarker;
var sb = new StringBuilder();
ITypeDeclaration prevId = null;
foreach (var i in importsToSort)
{
sb.Append(indent);
if (i.Attributes != null)
{
foreach (var attr in i.Attributes)
{
if (attributesNotToWrite.Contains(attr))
{
continue;
}
sb.Append(attr.ToString()).Append(' ');
}
}
sb.Append(i.ToCode(false)).Append(";").Append(eol);
if (separatePackageRoots)
{
var iid = ImportComparer.ExtractPrimaryId(i);
if (prevId != null && iid != null &&
(iid.InnerDeclaration ?? iid).ToString(true) != (prevId.InnerDeclaration ?? prevId).ToString(true))
{
sb.Append(eol);
}
prevId = iid;
}
}
editor.Insert(firstOffset, sb.ToString());
}
