int FindWordStart(Document.Document document, int offset)
{
LineSegment line = document.GetLineSegmentForOffset(offset);
if (offset > 0 && Char.IsWhiteSpace(document.GetCharAt(offset - 1)) && Char.IsWhiteSpace(document.GetCharAt(offset)))
{
while (offset > line.Offset && Char.IsWhiteSpace(document.GetCharAt(offset - 1)))
{
--offset;
}
}
else if (IsSelectableChar(document.GetCharAt(offset)) || (offset > 0 && Char.IsWhiteSpace(document.GetCharAt(offset)) && IsSelectableChar(document.GetCharAt(offset - 1))))
{
while (offset > line.Offset && IsSelectableChar(document.GetCharAt(offset - 1)))
{
--offset;
}
}
else
{
if (offset > 0 && !Char.IsWhiteSpace(document.GetCharAt(offset - 1)) && !IsSelectableChar(document.GetCharAt(offset - 1)))
{
return(Math.Max(0, offset - 1));
}
}
return(offset);
}
// go back to the start of the word we are on
// if we are already at the start of a word or if we are in whitespace, then go back
// to the start of the previous word
public static int FindPrevWordStart(Document document, int offset)
{
int originalOffset = offset;
if (offset > 0)
{
LineSegment line = document.GetLineSegmentForOffset(offset);
CharacterType t = GetCharacterType(document.GetCharAt(offset - 1));
while (offset > line.Offset && GetCharacterType(document.GetCharAt(offset - 1)) == t)
{
--offset;
}
// if we were in whitespace, and now we're at the end of a word or operator, go back to the beginning of it
if (t == CharacterType.WhiteSpace && offset > line.Offset)
{
t = GetCharacterType(document.GetCharAt(offset - 1));
while (offset > line.Offset && GetCharacterType(document.GetCharAt(offset - 1)) == t)
{
--offset;
}
}
}
return(offset);
}
int FindNext(Document.Document document, int offset, char ch)
{
LineSegment line = document.GetLineSegmentForOffset(offset);
int endPos = line.Offset + line.Length;
while (offset < endPos && document.GetCharAt(offset) != ch)
{
++offset;
}
return(offset);
}
public static int FindWordStart(Document document, int offset)
{
LineSegment line = document.GetLineSegmentForOffset(offset);
int lineOffset = line.Offset;
while (offset > lineOffset && IsLetterDigitOrUnderscore(document.GetCharAt(offset - 1)))
{
--offset;
}
return(offset);
}
public static int FindWordEnd(Document document, int offset)
{
LineSegment line = document.GetLineSegmentForOffset(offset);
int endPos = line.Offset + line.Length;
while (offset < endPos && IsLetterDigitOrUnderscore(document.GetCharAt(offset)))
{
++offset;
}
return(offset);
}
// go forward to the start of the next word
// if the cursor is at the start or in the middle of a word we move to the end of the word
// and then past any whitespace that follows it
// if the cursor is at the start or in the middle of some whitespace we move to the start of the
// next word
public static int FindNextWordStart(Document document, int offset)
{
int originalOffset = offset;
LineSegment line = document.GetLineSegmentForOffset(offset);
int endPos = line.Offset + line.Length;
// lets go to the end of the word, whitespace or operator
CharacterType t = GetCharacterType(document.GetCharAt(offset));
while (offset < endPos && GetCharacterType(document.GetCharAt(offset)) == t)
{
++offset;
}
// now we're at the end of the word, lets find the start of the next one by skipping whitespace
while (offset < endPos && GetCharacterType(document.GetCharAt(offset)) == CharacterType.WhiteSpace)
{
++offset;
}
return(offset);
}
int FindWordEnd(Document.Document document, int offset)
{
LineSegment line = document.GetLineSegmentForOffset(offset);
if (line.Length == 0)
{
return(offset);
}
int endPos = line.Offset + line.Length;
offset = Math.Min(offset, endPos - 1);
if (IsSelectableChar(document.GetCharAt(offset)))
{
while (offset < endPos && IsSelectableChar(document.GetCharAt(offset)))
{
++offset;
}
}
else if (Char.IsWhiteSpace(document.GetCharAt(offset)))
{
if (offset > 0 && Char.IsWhiteSpace(document.GetCharAt(offset - 1)))
{
while (offset < endPos && Char.IsWhiteSpace(document.GetCharAt(offset)))
{
++offset;
}
}
}
else
{
return(Math.Max(0, offset + 1));
}
return(offset);
}