protected override void onDraw(Context gr)
{
base.onDraw(gr);
gr.SelectFontFace(Font.Name, Font.Slant, Font.Wheight);
gr.SetFontSize(Font.Size);
gr.FontOptions = Interface.FontRenderingOptions;
gr.Antialias = Interface.Antialias;
Rectangle cb = ClientRectangle;
Foreground.SetAsSource(gr);
buffer.editMutex.EnterReadLock();
editorMutex.EnterReadLock();
#region draw text cursor
if (buffer.SelectionInProgress)
{
selStartCol = getTabulatedColumn(buffer.SelectionStart);
selEndCol = getTabulatedColumn(buffer.SelectionEnd);
}
else if (HasFocus && printedCurrentLine >= 0)
{
gr.LineWidth = 1.0;
double cursorX = cb.X + (getTabulatedColumn(buffer.CurrentPosition) - ScrollX) * fe.MaxXAdvance + leftMargin;
gr.MoveTo(0.5 + cursorX, cb.Y + (printedCurrentLine) * (fe.Ascent + fe.Descent));
gr.LineTo(0.5 + cursorX, cb.Y + (printedCurrentLine + 1) * (fe.Ascent + fe.Descent));
gr.Stroke();
}
#endregion
if (PrintedLines?.Count > 0)
{
int unfoldedLines = buffer.UnfoldedLines;
currentNode = null;
CodeLine cl = PrintedLines[0];
int idx0 = buffer.IndexOf(cl);
int li = idx0 - 1;
while (li >= 0)
{
if (buffer [li].IsFoldable && !buffer [li].IsFolded)
{
if (buffer.IndexOf(buffer [li].SyntacticNode.EndLine) > idx0)
{
currentNode = buffer [li].SyntacticNode;
break;
}
}
li--;
}
for (int i = 0; i < visibleLines; i++)
{
if (i + ScrollY >= unfoldedLines) //TODO:need optimize
{
break;
}
drawLine(gr, cb, i);
}
}
editorMutex.ExitReadLock();
buffer.editMutex.ExitReadLock();
}
void drawLine(Context gr, Rectangle cb, int i)
{
CodeLine cl = PrintedLines[i];
int lineIndex = buffer.IndexOf(cl);
double y = cb.Y + (fe.Ascent + fe.Descent) * i, x = cb.X;
//Draw line numbering
Color mgFg = Colors.Jet;
Color mgBg = Colors.Grey;
if (PrintLineNumbers)
{
Rectangle mgR = new Rectangle((int)x, (int)y, leftMargin - leftMarginGap, (int)Math.Ceiling((fe.Ascent + fe.Descent)));
if (cl.exception != null)
{
mgBg = Colors.Red;
if (buffer.CurrentLine == lineIndex)
{
mgFg = Colors.White;
}
else
{
mgFg = Colors.LightGrey;
}
}
else if (buffer.CurrentLine == lineIndex && HasFocus)
{
mgFg = Colors.Black;
mgBg = Colors.DarkGrey;
}
string strLN = (lineIndex + 1).ToString();
gr.SetSourceColor(mgBg);
gr.Rectangle(mgR);
gr.Fill();
gr.SetSourceColor(mgFg);
gr.MoveTo(cb.X + (int)(gr.TextExtents(buffer.LineCount.ToString()).Width - gr.TextExtents(strLN).Width), y + fe.Ascent);
gr.ShowText(strLN);
gr.Fill();
}
//draw folding
if (foldingEnabled)
{
Rectangle rFld = new Rectangle(cb.X + leftMargin - leftMarginGap - foldMargin,
(int)(y + (fe.Ascent + fe.Descent) / 2.0 - foldSize / 2.0), foldSize, foldSize);
gr.SetSourceColor(Colors.Black);
gr.LineWidth = 1.0;
int level = 0;
bool closingNode = false;
if (currentNode != null)
{
if (cl == currentNode.EndLine)
{
currentNode = currentNode.Parent;
closingNode = true;
}
if (currentNode != null)
{
level = currentNode.Level - 1;
}
}
/*for (int l = 0; l < level; l++) {
* gr.MoveTo (rFld.Center.X + 0.5, y);
* gr.LineTo (rFld.Center.X + 0.5, y + fe.Ascent + fe.Descent);
* rFld.Left += foldHSpace;
* }*/
if (level > 0)
{
gr.MoveTo(rFld.Center.X + 0.5, y);
gr.LineTo(rFld.Center.X + 0.5, y + fe.Ascent + fe.Descent);
}
if (closingNode)
{
gr.MoveTo(rFld.Center.X + 0.5, y);
gr.LineTo(rFld.Center.X + 0.5, y + fe.Ascent / 2 + 0.5);
gr.LineTo(rFld.Center.X + 0.5 + foldSize / 2, y + fe.Ascent / 2 + 0.5);
closingNode = false;
}
gr.SetDash(new double[] { 1.5 }, 0.0);
gr.SetSourceColor(Colors.Grey);
gr.Stroke();
gr.SetDash(new double[] {}, 0.0);
if (cl.IsFoldable)
{
gr.Rectangle(rFld);
gr.SetSourceColor(Colors.White);
gr.Fill();
gr.SetSourceColor(Colors.Black);
gr.Rectangle(rFld, 1.0);
if (cl.IsFolded)
{
gr.MoveTo(rFld.Center.X + 0.5, rFld.Y + 2);
gr.LineTo(rFld.Center.X + 0.5, rFld.Bottom - 2);
}
else
{
currentNode = cl.SyntacticNode;
}
gr.MoveTo(rFld.Left + 2, rFld.Center.Y + 0.5);
gr.LineTo(rFld.Right - 2, rFld.Center.Y + 0.5);
gr.Stroke();
}
}
gr.SetSourceColor(Foreground);
x += leftMargin;
if (cl.Tokens == null)
{
drawRawCodeLine(gr, x, y, i, lineIndex);
}
else
{
drawParsedCodeLine(gr, x, y, i, lineIndex);
}
}
void drawParsedCodeLine(Context gr, double x, double y, int i, int lineIndex)
{
int lPtr = 0;
CodeLine cl = PrintedLines[i];
for (int t = 0; t < cl.Tokens.Count; t++)
{
string lstr = cl.Tokens [t].PrintableContent;
if (lPtr < ScrollX)
{
if (lPtr - ScrollX + lstr.Length <= 0)
{
lPtr += lstr.Length;
continue;
}
lstr = lstr.Substring(ScrollX - lPtr);
lPtr += ScrollX - lPtr;
}
Color bg = this.Background;
Color fg = this.Foreground;
Color selbg = this.SelectionBackground;
Color selfg = this.SelectionForeground;
FontSlant fts = FontSlant.Normal;
FontWeight ftw = FontWeight.Normal;
if (formatting.ContainsKey((int)cl.Tokens [t].Type))
{
TextFormatting tf = formatting [(int)cl.Tokens [t].Type];
bg = tf.Background;
fg = tf.Foreground;
if (tf.Bold)
{
ftw = FontWeight.Bold;
}
if (tf.Italic)
{
fts = FontSlant.Italic;
}
}
gr.SelectFontFace(Font.Name, fts, ftw);
gr.SetSourceColor(fg);
gr.MoveTo(x, y + fe.Ascent);
gr.ShowText(lstr);
gr.Fill();
if (buffer.SelectionInProgress && lineIndex >= buffer.SelectionStart.Y && lineIndex <= buffer.SelectionEnd.Y &&
!(lineIndex == buffer.SelectionStart.Y && lPtr + lstr.Length <= selStartCol) &&
!(lineIndex == buffer.SelectionEnd.Y && selEndCol <= lPtr))
{
double rLineX = x,
rLineY = y,
rLineW = lstr.Length * fe.MaxXAdvance;
double startAdjust = 0.0;
if ((lineIndex == buffer.SelectionStart.Y) && (selStartCol < lPtr + lstr.Length) && (selStartCol > lPtr))
{
startAdjust = (selStartCol - lPtr) * fe.MaxXAdvance;
}
rLineX += startAdjust;
if ((lineIndex == buffer.SelectionEnd.Y) && (selEndCol < lPtr + lstr.Length))
{
rLineW = (selEndCol - lPtr) * fe.MaxXAdvance;
}
rLineW -= startAdjust;
gr.Save();
gr.Operator = Operator.Source;
gr.Rectangle(rLineX, rLineY, rLineW, (fe.Ascent + fe.Descent));
gr.SetSourceColor(selbg);
gr.FillPreserve();
gr.Clip();
gr.Operator = Operator.Over;
gr.SetSourceColor(selfg);
gr.MoveTo(x, y + fe.Ascent);
gr.ShowText(lstr);
gr.Fill();
gr.Restore();
}
x += (int)lstr.Length * fe.MaxXAdvance;
lPtr += lstr.Length;
}
}
protected void closeNodeAndGoUp(ref Node n, CodeLine cl)
{
SyntacticTreeDepth--;
n.EndLine = cl;
n = n.Parent;
}
public int IndexOf(CodeLine cl)
{
return(lines.IndexOf(cl));
}
public override void ParseCurrentLine()
{
//Debug.WriteLine (string.Format("parsing line:{0}", currentLine));
CodeLine cl = buffer [currentLine];
cl.Tokens = new List <Token> ();
//retrieve current parser state from previous line
if (currentLine > 0)
{
curState = (States)buffer[currentLine - 1].EndingState;
}
else
{
curState = States.init;
}
States previousEndingState = (States)cl.EndingState;
while (!eol)
{
SkipWhiteSpaces();
if (eol)
{
break;
}
if (Peek() == '\n')
{
if (currentTok != TokenType.Unknown)
{
throw new ParserException(currentLine, currentColumn, "Unexpected end of line");
}
Read();
eol = true;
continue;
}
switch (Peek())
{
case '/':
readToCurrTok(true);
switch (Peek())
{
case '/':
currentTok += ReadLine();
saveAndResetCurrentTok(TokenType.LineComment);
break;
default:
currentTok += ReadLine();
saveAndResetCurrentTok(TokenType.Unknown);
break;
}
break;
case ',':
if (curState != States.init && curState != States.classNames)
{
throw new ParserException(currentLine, currentColumn, "Unexpected char ','");
}
readAndResetCurrentTok(TokenType.OperatorOrPunctuation, true);
curState = States.classNames;
break;
case '{':
if (!(curState == States.init || curState == States.classNames))
{
throw new ParserException(currentLine, currentColumn, "Unexpected char '{'");
}
readAndResetCurrentTok(TokenType.OpenBlock, true);
curState = States.members;
break;
case '}':
if (curState != States.members)
{
throw new ParserException(currentLine, currentColumn, "Unexpected char '}'");
}
readAndResetCurrentTok(TokenType.CloseBlock, true);
curState = States.classNames;
break;
case '=':
if (curState == States.classNames)
{
throw new ParserException(currentLine, currentColumn, "Unexpected char '='");
}
setPreviousTokOfTypeTo(TokenType.Type, TokenType.Identifier);
readAndResetCurrentTok(TokenType.OperatorOrPunctuation, true);
curState = States.value;
break;
case '"':
if (curState != States.value)
{
throw new ParserException(currentLine, currentColumn, "Unexpected char '\"'");
}
readAndResetCurrentTok(TokenType.StringLitteralOpening, true);
while (!eol)
{
currentTok += ReadLineUntil("\"");
if (currentTok.Content [currentTok.Content.Length - 1] == '\\')
{
readToCurrTok();
}
else
{
break;
}
}
if (eol)
{
throw new ParserException(currentLine, currentColumn, "Unexpected end of line");
}
saveAndResetCurrentTok(TokenType.StringLitteral);
readAndResetCurrentTok(TokenType.StringLitteralClosing, true);
curState = States.endOfStatement;
break;
case ';':
if (curState != States.endOfStatement)
{
throw new ParserException(currentLine, currentColumn, "Unexpected end of statement");
}
readAndResetCurrentTok(TokenType.StatementEnding, true);
curState = States.members;
break;
default:
if (currentTok.Type != TokenType.Unknown)
{
throw new ParserException(currentLine, currentColumn, "error curtok not null");
}
if (curState == States.value)
{
throw new ParserException(currentLine, currentColumn, "expecting value enclosed in '\"'");
}
if (curState == States.endOfStatement)
{
throw new ParserException(currentLine, currentColumn, "expecting end of statement");
}
if (nextCharIsValidCharStartName)
{
readToCurrTok(true);
while (nextCharIsValidCharName)
{
readToCurrTok();
}
}
saveAndResetCurrentTok(TokenType.Type);
break;
}
}
if (cl.EndingState != (int)curState && currentLine < buffer.LineCount - 1)
{
buffer [currentLine + 1].Tokens = null;
}
cl.EndingState = (int)curState;
}
public override void SyntaxAnalysis()
{
initSyntaxAnalysis();
Node currentNode = RootNode;
int ptrLine = 0;
while (ptrLine < buffer.LineCount)
{
CodeLine cl = buffer [ptrLine];
if (cl.Tokens == null)
{
ptrLine++;
continue;
}
cl.SyntacticNode = null;
int tokPtr = 0;
bool onlyWhiteSpace = true;
while (tokPtr < cl.Tokens.Count)
{
if (cl.Tokens [tokPtr].Type == TokenType.WhiteSpace)
{
tokPtr++;
continue;
}
if (cl.Tokens [tokPtr].Type == TokenType.LineComment && onlyWhiteSpace)
{
int startLine = ptrLine;
ptrLine++;
while (ptrLine < buffer.LineCount)
{
int idx = buffer [ptrLine].FirstNonBlankTokIndex;
if (idx < 0)
{
break;
}
if (buffer [ptrLine].Tokens [idx].Type != TokenType.LineComment)
{
break;
}
ptrLine++;
}
ptrLine--;
if (ptrLine - startLine > 0)
{
currentNode = addChildNode(currentNode, cl, tokPtr, "comment");
closeNodeAndGoUp(ref currentNode, buffer [ptrLine], "comment");
}
break;
}
switch (cl.Tokens [tokPtr].Type)
{
case TokenType.OpenBlock:
currentNode = addChildNode(currentNode, cl, tokPtr);
break;
case TokenType.CloseBlock:
closeNodeAndGoUp(ref currentNode, cl);
break;
case TokenType.Preprocessor:
if (cl.Tokens [tokPtr].Content.StartsWith("#region"))
{
currentNode = addChildNode(currentNode, cl, tokPtr, "region");
}
else if (cl.Tokens [tokPtr].Content.StartsWith("#endregion"))
{
closeNodeAndGoUp(ref currentNode, cl, "region");
}
break;
}
onlyWhiteSpace = false;
tokPtr++;
}
ptrLine++;
}
ptrLine = 0;
while (ptrLine < buffer.LineCount)
{
CodeLine cl = buffer [ptrLine];
if (cl.IsFoldable)
{
if (cl.SyntacticNode.Type == "comment" || cl.SyntacticNode.Type == "region")
{
cl.IsFolded = true;
}
}
ptrLine++;
}
}
public override void ParseCurrentLine()
{
//Debug.WriteLine (string.Format("parsing line:{0}", currentLine));
CodeLine cl = buffer [currentLine];
cl.Tokens = new List <Token> ();
//retrieve current parser state from previous line
if (currentLine > 0)
{
curState = (States)buffer[currentLine - 1].EndingState;
}
else
{
curState = States.init;
}
States previousEndingState = (States)cl.EndingState;
while (!eol)
{
if (currentTok.IsNull)
{
SkipWhiteSpaces();
}
if (curState == States.BlockComment)
{
currentTok.Start = CurrentPosition;
currentTok.Type = (BufferParser.TokenType)TokenType.BlockComment;
currentTok += ReadLineUntil("*/");
if (Peek(2) == "*/")
{
readToCurrTok(2);
curState = savedState;
}
saveAndResetCurrentTok();
continue;
}
switch (Peek())
{
case '\n':
eol = true;
if (!currentTok.IsNull)
{
saveAndResetCurrentTok();
}
break;
case '#':
readToCurrTok(true);
currentTok += ReadLine();
saveAndResetCurrentTok(TokenType.Preprocessor);
break;
case '/':
readToCurrTok(true);
switch (Peek())
{
case '*':
readToCurrTok();
currentTok += ReadLine();
//currentTok.Type = (Parser.TokenType)TokenType.BlockComment;
savedState = curState;
curState = States.BlockComment;
saveAndResetCurrentTok(TokenType.BlockComment);
break;
case '/':
//readToCurrTok ();
currentTok += ReadLine();
saveAndResetCurrentTok(TokenType.LineComment);
//currentTok.Type = (Parser.TokenType)TokenType.LineComment;
break;
default:
currentTok += ReadLine();
saveAndResetCurrentTok(TokenType.Unknown);
break;
}
break;
case '{':
if (currentTok.IsNull)
{
readAndResetCurrentTok(TokenType.OpenBlock, true);
}
else
{
readToCurrTok();
}
break;
case '}':
if (currentTok.IsNull)
{
readAndResetCurrentTok(TokenType.CloseBlock, true);
}
else
{
readToCurrTok();
}
break;
case '\\': //unicode escape sequence
if (!(currentTok.Type == TokenType.Identifier ||
currentTok.IsEmpty || currentTok.Type == TokenType.StringLitteral || currentTok.Type == TokenType.CharLitteral))
{
saveAndResetCurrentTok();
}
Point pos = CurrentPosition;
Read();
char escChar = Read();
if (escChar == 'u')
{
char c = char.ConvertFromUtf32(int.Parse(Read(4), System.Globalization.NumberStyles.HexNumber))[0];
if (currentTok.IsEmpty)
{
if (!CharIsValidCharStartName(c))
{
throwParserException("expecting identifier start");
}
currentTok.Start = pos;
currentTok.Type = TokenType.Identifier;
}
else if (currentTok.Type == TokenType.Identifier)
{
if (!CharIsValidCharName(c))
{
throwParserException("expecting identifier valid char");
}
}
currentTok += c;
break;
}
currentTok += new String(new char[] { '\\', escChar });
break;
case '\'':
if (currentTok.IsNull)
{
readAndResetCurrentTok(TokenType.CharLitteralOpening, true);
currentTok.Type = TokenType.CharLitteral;
}
else if (currentTok.Type == TokenType.CharLitteral)
{
saveAndResetCurrentTok();
readAndResetCurrentTok(TokenType.CharLitteralClosing, true);
}
else if (currentTok.Type == TokenType.StringLitteral)
{
readToCurrTok();
}
else
{
throwParserException("unexpected character: (\')");
}
break;
case '"':
if (currentTok.IsNull)
{
readAndResetCurrentTok(TokenType.StringLitteralOpening, true);
currentTok.Type = TokenType.StringLitteral;
}
else if (currentTok.Type == TokenType.StringLitteral)
{
saveAndResetCurrentTok();
readAndResetCurrentTok(TokenType.StringLitteralClosing, true);
}
else
{
throwParserException("unexpected character: (\")");
}
break;
default:
if (currentTok.Type == TokenType.StringLitteral || currentTok.Type == TokenType.CharLitteral)
{
readToCurrTok(currentTok.IsEmpty);
}
else if (currentTok.IsNull)
{
if (nextCharIsValidCharStartName)
{
readToCurrTok(true);
while (nextCharIsValidCharName)
{
readToCurrTok();
}
if (keywords.Contains(currentTok.Content))
{
saveAndResetCurrentTok(TokenType.Keyword);
}
else
{
saveAndResetCurrentTok(TokenType.Identifier);
}
continue;
}
else
{
readAndResetCurrentTok(TokenType.Unknown, true);
}
}
else
{
readAndResetCurrentTok(TokenType.Unknown, true);
}
break;
}
}
if (cl.EndingState != (int)curState && currentLine < buffer.LineCount - 1)
{
buffer [currentLine + 1].Tokens = null;
}
cl.EndingState = (int)curState;
}