public void Style(Scintilla scintilla, int startPos, int endPos)
{
// 改行コードをWindowsフォーマット(CR+LF)またはUnixフォーマット(LF)から
// Macフォーマット(CR)にしたときに発生する例外(IndexOutOfRangeException)を回避
startPos = startPos < 0 ? 0 : startPos;
endPos = endPos > scintilla.TextLength ? scintilla.TextLength : endPos;
int lineNumber = scintilla.LineFromPosition(startPos);
startPos = scintilla.Lines[lineNumber].Position;
char chBeforePrev = '\0';
char chPrev = '\0';
char ch = '\0';
char chNext = '\0';
char chAfterNext = '\0';
int length = 0;
ParseState state = ParseState.None;
switch (scintilla.GetStyleAt(startPos - 1)) {
case HspLexer.StylePreprocessor:
state = ParseState.AfterPreprocessor;
break;
case HspLexer.StyleString:
state = ParseState.String;
break;
case HspLexer.StyleComment:
state = ParseState.Comment;
break;
}
scintilla.StartStyling(startPos);
int currentPos = startPos;
int currentLine = lineNumber;
int currentLineStartPos = startPos;
int currentLineEndPos = scintilla.Lines[lineNumber].EndPosition;
while (currentPos < endPos) {
chBeforePrev = (char)scintilla.GetCharAt(currentPos - 2);
chPrev = (char)scintilla.GetCharAt(currentPos - 1);
ch = (char)scintilla.GetCharAt(currentPos);
chNext = (char)scintilla.GetCharAt(currentPos + 1);
chAfterNext = (char)scintilla.GetCharAt(currentPos + 2);
Process:
switch (state) {
case ParseState.None:
if (ch == '\"') {
// 文字列
scintilla.SetStyling(1, HspLexer.StyleStringLine);
state = ParseState.StringLine;
} else if (ch == '{' && chNext == '\"') {
// 複数行文字列
scintilla.SetStyling(2, HspLexer.StyleString);
state = ParseState.String;
++currentPos;
} else if (ch == '\'') {
// 文字
scintilla.SetStyling(1, HspLexer.StyleCharacter);
state = ParseState.Character;
} else if (ch == ';') {
// 単一行コメント
scintilla.SetStyling(1, HspLexer.StyleCommentLine);
state = ParseState.CommentLine;
} else if (ch == '/' && chNext == '/') {
// 単一行コメント
scintilla.SetStyling(2, HspLexer.StyleCommentLine);
state = ParseState.CommentLine;
++currentPos;
} else if (ch == '/' && chNext == '*') {
// 複数行コメント
scintilla.SetStyling(2, HspLexer.StyleComment);
state = ParseState.Comment;
++currentPos;
} else if (ch == '*' && (Char.IsLetter(chNext) || chNext == '_') &&
String.IsNullOrWhiteSpace(scintilla.GetTextRange(
currentLineStartPos, currentPos - currentLineStartPos))) {
// ラベル
scintilla.SetStyling(2, HspLexer.StyleLabel);
state = ParseState.Label;
++currentPos;
} else if (ch == '#' && length == 0 &&
String.IsNullOrWhiteSpace(scintilla.GetTextRange(
currentLineStartPos, currentPos - currentLineStartPos))) {
// プリプロセッサ
state = ParseState.Preprocessor;
goto Process;
} else if ((Char.IsLetter(ch) || ch == '_') && length == 0) {
// 識別子
state = ParseState.Identifier;
goto Process;
} else if (ch == ':') {
// 行区切り
currentLineStartPos = currentPos + 1;
scintilla.SetStyling(1, HspLexer.StyleDefault);
} else if (ch == '\0') {
// NULL文字の場合はすぐreturn
return;
} else {
scintilla.SetStyling(1, HspLexer.StyleDefault);
}
break;
case ParseState.StringLine:
if (ch == '\\' && chNext == '\\') {
// エスケープシーケンス '\\'
scintilla.SetStyling(2, HspLexer.StyleStringLine);
++currentPos;
} else if (ch == '\\' && chNext == '\"') {
// エスケープシーケンス '\"'
scintilla.SetStyling(2, HspLexer.StyleStringLine);
++currentPos;
} else if (ch == '\"') {
scintilla.SetStyling(1, HspLexer.StyleStringLine);
state = ParseState.None;
} else {
scintilla.SetStyling(1, HspLexer.StyleStringLine);
}
break;
case ParseState.String:
if (ch == '\\' && chNext == '\\') {
// エスケープシーケンス '\\'
scintilla.SetStyling(2, HspLexer.StyleString);
++currentPos;
} else if (ch == '\\' && chNext == '\"') {
// エスケープシーケンス '\"'
scintilla.SetStyling(2, HspLexer.StyleString);
++currentPos;
} else if (ch == '\"' && chNext == '}') {
scintilla.SetStyling(2, HspLexer.StyleString);
state = ParseState.None;
++currentPos;
} else {
scintilla.SetStyling(1, HspLexer.StyleString);
}
break;
case ParseState.Character:
if (ch == '\'') {
scintilla.SetStyling(1, HspLexer.StyleCharacter);
state = ParseState.None;
} else {
scintilla.SetStyling(1, HspLexer.StyleCharacter);
}
break;
case ParseState.CommentLine:
if (ch == '\n') {
scintilla.SetStyling(1, HspLexer.StyleCommentLine);
state = ParseState.None;
} else {
scintilla.SetStyling(1, HspLexer.StyleCommentLine);
}
break;
case ParseState.Comment:
if (ch == '*' && chNext == '/') {
scintilla.SetStyling(2, HspLexer.StyleComment);
state = ParseState.None;
++currentPos;
} else {
scintilla.SetStyling(1, HspLexer.StyleComment);
}
break;
case ParseState.Label:
if (Char.IsLetterOrDigit(ch) || ch == '_') {
scintilla.SetStyling(1, HspLexer.StyleLabel);
} else {
state = ParseState.None;
goto Process;
}
break;
case ParseState.Preprocessor:
if (ch == '#' && length == 0 &&
String.IsNullOrWhiteSpace(scintilla.GetTextRange(
currentLineStartPos, currentPos - currentLineStartPos))) {
++length;
} else if ((ch == '\t' || ch == '\u0020' || ch == '\u3000') && length == 1) {
// '#' の後のタブ文字, 半角スペース, 全角スペースの場合
state = ParseState.SpaceInPreprocessor;
goto Process;
} else if ((Char.IsLetter(ch) || ch == '_') && length == 1) {
++length;
} else if ((Char.IsLetterOrDigit(ch) || ch == '_') && length > 1) {
++length;
} else {
int style = HspLexer.StyleDefault;
string identifier = scintilla.GetTextRange(currentPos - length, length);
char[] removeChars = { '\t', '\u0020', '\u3000' };
identifier = removeChars.Aggregate(identifier, (s, c) => s.Replace(c.ToString(), String.Empty));
identifier = identifier.ToLower();
if (this.mKeywords.ContainsKey(identifier)) {
switch (this.mKeywords[identifier].mType) {
case KeywordType.Preprocessor:
style = HspLexer.StylePreprocessor;
break;
}
}
scintilla.SetStyling(length, style);
length = 0;
switch (style) {
case HspLexer.StyleDefault:
state = ParseState.None;
break;
case HspLexer.StylePreprocessor:
state = ParseState.AfterPreprocessor;
break;
}
goto Process;
}
break;
case ParseState.SpaceInPreprocessor:
if ((ch == '\t' || ch == '\u0020' || ch == '\u3000')) {
++length;
} else if ((Char.IsLetter(ch) || ch == '_')) {
state = ParseState.Preprocessor;
goto Process;
} else {
scintilla.SetStyling(length, HspLexer.StyleDefault);
length = 0;
state = ParseState.None;
goto Process;
}
break;
case ParseState.AfterPreprocessor:
if (ch == '\\' && chNext == '\r' && chAfterNext == '\n') {
scintilla.SetStyling(3, HspLexer.StylePreprocessor);
currentPos += 2;
} else if (ch == '\\' && chNext == '\n') {
scintilla.SetStyling(2, HspLexer.StylePreprocessor);
++currentPos;
} else if (ch == '\r' && chNext == '\n') {
scintilla.SetStyling(2, HspLexer.StyleDefault);
state = ParseState.None;
++currentPos;
} else if (ch == '\n') {
scintilla.SetStyling(1, HspLexer.StyleDefault);
state = ParseState.None;
} else {
scintilla.SetStyling(1, HspLexer.StylePreprocessor);
}
break;
case ParseState.Identifier:
if (Char.IsLetterOrDigit(ch) || ch == '_') {
++length;
} else {
int style = HspLexer.StyleDefault;
string identifier = scintilla.GetTextRange(currentPos - length, length);
identifier = identifier.ToLower();
if (this.mKeywords.ContainsKey(identifier)) {
switch (this.mKeywords[identifier].mType) {
case KeywordType.Macro:
style = HspLexer.StyleMacro;
break;
case KeywordType.Function:
style = HspLexer.StyleFunction;
break;
case KeywordType.Type:
style = HspLexer.StyleType;
break;
}
}
scintilla.SetStyling(length, style);
length = 0;
state = ParseState.None;
goto Process;
}
break;
}
++currentPos;
currentLine = scintilla.LineFromPosition(currentPos);
if (currentLineStartPos < scintilla.Lines[currentLine].Position) {
currentLineStartPos = scintilla.Lines[currentLine].Position;
}
currentLineEndPos = scintilla.Lines[currentLine].EndPosition;
}
}