public char NextChar(int pos, ref int foundPos)
{
char ch = char.MinValue;
int nextpos = pos;
while (true)
{
if (nextpos >= TextLength)
{
break;
}
ch = NativeInterface.GetCharAt(nextpos);
if (ch == '\t' || ch == ' ' || ch == '\r' || ch == '\v' || ch == '\n')
{
nextpos = NativeInterface.PositionAfter(nextpos);
continue;
}
else
{
foundPos = nextpos;
return(ch);
}
}
foundPos = -1;
return(ch);
}
private char SafeGetChar(int pos)
{
if (pos < 0 || pos >= TextLength)
{
return(char.MinValue);
}
return(NativeInterface.GetCharAt(pos));
}
public char PreviousChar(int pos, ref int foundPos, bool wantWhitespace)
{
char ch = char.MinValue;
int curpos = NativeInterface.PositionBefore(pos);
if (curpos == 0)
{
foundPos = curpos;
return(ch);
}
while (true)
{
ch = NativeInterface.GetCharAt(curpos);
if (ch == '\t' || ch == ' ' || ch == '\r' || ch == '\v' || ch == '\n')
{
//if the caller is interested in whitespace,
//simply return it
if (wantWhitespace)
{
foundPos = curpos;
return(ch);
}
long tmpPos = curpos;
curpos = NativeInterface.PositionBefore(curpos);
if (curpos == 0 && tmpPos == curpos)
{
break;
}
}
else
{
foundPos = curpos;
return(ch);
}
}
foundPos = -1;
return(ch);
}
public string PreviousWord(int pos, ref int foundPos)
{
// Get the partial word that we have
char ch = char.MinValue;
int curpos = NativeInterface.PositionBefore(pos);
if (curpos == 0)
{
foundPos = -1;
return("");
}
while (true)
{
ch = NativeInterface.GetCharAt(curpos);
if (ch == '\t' || ch == ' ' || ch == '\r' || ch == '\v' || ch == '\n')
{
int tmpPos = curpos;
curpos = NativeInterface.PositionBefore(curpos);
if (curpos == 0 && tmpPos == curpos)
{
break;
}
}
else
{
int start = NativeInterface.WordStartPosition(curpos, true);
int end = NativeInterface.WordEndPosition(curpos, true);
//return NativeInterface.GetTextRange(start, end);
return(new Range(start, end, this).Text);
}
}
foundPos = -1;
return("");
}
public bool MatchBraceForward(char chOpenBrace, int pos, ref int matchedPos)
{
if (pos <= 0)
{
return(false);
}
char chCloseBrace;
switch (chOpenBrace)
{
case '{':
{
chCloseBrace = '}';
break;
}
case '(':
{
chCloseBrace = ')';
break;
}
case '[':
{
chCloseBrace = ']';
break;
}
case '<':
{
chCloseBrace = '>';
break;
}
default:
{
return(false);
}
}
int nNextPos = pos;
char ch;
int depth = 1;
while (true)
{
if (nNextPos >= this.TextLength)
{
break;
}
nNextPos = NativeInterface.PositionAfter(nNextPos);
// Make sure we are not in a comment
if (m_context.IsCommentOrString(nNextPos))
{
continue;
}
ch = NativeInterface.GetCharAt(nNextPos);
if (ch == chCloseBrace)
{
// Dec the depth level
depth--;
if (depth == 0)
{
matchedPos = nNextPos;
return(true);
}
}
else if (ch == chOpenBrace)
{
// Inc depth level
depth++;
}
}
return(false);
}
public bool MatchBraceBack(char chCloseBrace, int pos, ref int matchedPos)
{
if (pos <= 0)
{
return(false);
}
char chOpenBrace;
switch (chCloseBrace)
{
case '}':
{
chOpenBrace = '{';
break;
}
case ')':
{
chOpenBrace = '(';
break;
}
case ']':
{
chOpenBrace = '[';
break;
}
case '>':
{
chOpenBrace = '<';
break;
}
default:
{
return(false);
}
}
int nPrevPos = pos;
char ch;
int depth = 1;
// We go backward
while (true)
{
if (nPrevPos == 0)
{
break;
}
nPrevPos = NativeInterface.PositionBefore(nPrevPos);
// Make sure we are not in a comment
if (m_context.IsCommentOrString(nPrevPos))
{
continue;
}
ch = NativeInterface.GetCharAt(nPrevPos);
if (ch == chOpenBrace)
{
// Dec the depth level
depth--;
if (depth == 0)
{
matchedPos = nPrevPos;
return(true);
}
}
else if (ch == chCloseBrace)
{
// Inc depth level
depth++;
}
}
return(false);
}
