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Diffstat (limited to 'lexlib/StyleContext.h')
| -rw-r--r-- | lexlib/StyleContext.h | 212 |
1 files changed, 0 insertions, 212 deletions
diff --git a/lexlib/StyleContext.h b/lexlib/StyleContext.h deleted file mode 100644 index c9ff4efbb..000000000 --- a/lexlib/StyleContext.h +++ /dev/null @@ -1,212 +0,0 @@ -// Scintilla source code edit control -/** @file StyleContext.h - ** Lexer infrastructure. - **/ -// Copyright 1998-2004 by Neil Hodgson <neilh@scintilla.org> -// This file is in the public domain. - -#ifndef STYLECONTEXT_H -#define STYLECONTEXT_H - -namespace Scintilla { - -// All languages handled so far can treat all characters >= 0x80 as one class -// which just continues the current token or starts an identifier if in default. -// DBCS treated specially as the second character can be < 0x80 and hence -// syntactically significant. UTF-8 avoids this as all trail bytes are >= 0x80 -class StyleContext { - LexAccessor &styler; - IDocument *multiByteAccess; - Sci_PositionU endPos; - Sci_PositionU lengthDocument; - - // Used for optimizing GetRelativeCharacter - Sci_PositionU posRelative; - Sci_PositionU currentPosLastRelative; - Sci_Position offsetRelative; - - void GetNextChar() { - if (multiByteAccess) { - chNext = multiByteAccess->GetCharacterAndWidth(currentPos+width, &widthNext); - } else { - chNext = static_cast<unsigned char>(styler.SafeGetCharAt(currentPos+width, 0)); - widthNext = 1; - } - // End of line determined from line end position, allowing CR, LF, - // CRLF and Unicode line ends as set by document. - if (currentLine < lineDocEnd) - atLineEnd = static_cast<Sci_Position>(currentPos) >= (lineStartNext-1); - else // Last line - atLineEnd = static_cast<Sci_Position>(currentPos) >= lineStartNext; - } - -public: - Sci_PositionU currentPos; - Sci_Position currentLine; - Sci_Position lineDocEnd; - Sci_Position lineStartNext; - bool atLineStart; - bool atLineEnd; - int state; - int chPrev; - int ch; - Sci_Position width; - int chNext; - Sci_Position widthNext; - - StyleContext(Sci_PositionU startPos, Sci_PositionU length, - int initStyle, LexAccessor &styler_, char chMask='\377') : - styler(styler_), - multiByteAccess(nullptr), - endPos(startPos + length), - posRelative(0), - currentPosLastRelative(0x7FFFFFFF), - offsetRelative(0), - currentPos(startPos), - currentLine(-1), - lineStartNext(-1), - atLineEnd(false), - state(initStyle & chMask), // Mask off all bits which aren't in the chMask. - chPrev(0), - ch(0), - width(0), - chNext(0), - widthNext(1) { - if (styler.Encoding() != EncodingType::eightBit) { - multiByteAccess = styler.MultiByteAccess(); - } - styler.StartAt(startPos /*, chMask*/); - styler.StartSegment(startPos); - currentLine = styler.GetLine(startPos); - lineStartNext = styler.LineStart(currentLine+1); - lengthDocument = static_cast<Sci_PositionU>(styler.Length()); - if (endPos == lengthDocument) - endPos++; - lineDocEnd = styler.GetLine(lengthDocument); - atLineStart = static_cast<Sci_PositionU>(styler.LineStart(currentLine)) == startPos; - - // Variable width is now 0 so GetNextChar gets the char at currentPos into chNext/widthNext - width = 0; - GetNextChar(); - ch = chNext; - width = widthNext; - - GetNextChar(); - } - // Deleted so StyleContext objects can not be copied. - StyleContext(const StyleContext &) = delete; - StyleContext &operator=(const StyleContext &) = delete; - void Complete() { - styler.ColourTo(currentPos - ((currentPos > lengthDocument) ? 2 : 1), state); - styler.Flush(); - } - bool More() const noexcept { - return currentPos < endPos; - } - void Forward() { - if (currentPos < endPos) { - atLineStart = atLineEnd; - if (atLineStart) { - currentLine++; - lineStartNext = styler.LineStart(currentLine+1); - } - chPrev = ch; - currentPos += width; - ch = chNext; - width = widthNext; - GetNextChar(); - } else { - atLineStart = false; - chPrev = ' '; - ch = ' '; - chNext = ' '; - atLineEnd = true; - } - } - void Forward(Sci_Position nb) { - for (Sci_Position i = 0; i < nb; i++) { - Forward(); - } - } - void ForwardBytes(Sci_Position nb) { - const Sci_PositionU forwardPos = currentPos + nb; - while (forwardPos > currentPos) { - const Sci_PositionU currentPosStart = currentPos; - Forward(); - if (currentPos == currentPosStart) { - // Reached end - return; - } - } - } - void ChangeState(int state_) noexcept { - state = state_; - } - void SetState(int state_) { - styler.ColourTo(currentPos - ((currentPos > lengthDocument) ? 2 : 1), state); - state = state_; - } - void ForwardSetState(int state_) { - Forward(); - styler.ColourTo(currentPos - ((currentPos > lengthDocument) ? 2 : 1), state); - state = state_; - } - Sci_Position LengthCurrent() const { - return currentPos - styler.GetStartSegment(); - } - int GetRelative(Sci_Position n, char chDefault='\0') { - return static_cast<unsigned char>(styler.SafeGetCharAt(currentPos+n, chDefault)); - } - int GetRelativeCharacter(Sci_Position n) { - if (n == 0) - return ch; - if (multiByteAccess) { - if ((currentPosLastRelative != currentPos) || - ((n > 0) && ((offsetRelative < 0) || (n < offsetRelative))) || - ((n < 0) && ((offsetRelative > 0) || (n > offsetRelative)))) { - posRelative = currentPos; - offsetRelative = 0; - } - const Sci_Position diffRelative = n - offsetRelative; - const Sci_Position posNew = multiByteAccess->GetRelativePosition(posRelative, diffRelative); - const int chReturn = multiByteAccess->GetCharacterAndWidth(posNew, nullptr); - posRelative = posNew; - currentPosLastRelative = currentPos; - offsetRelative = n; - return chReturn; - } else { - // fast version for single byte encodings - return static_cast<unsigned char>(styler.SafeGetCharAt(currentPos + n, 0)); - } - } - bool Match(char ch0) const { - return ch == static_cast<unsigned char>(ch0); - } - bool Match(char ch0, char ch1) const { - return (ch == static_cast<unsigned char>(ch0)) && (chNext == static_cast<unsigned char>(ch1)); - } - bool Match(const char *s) { - if (ch != static_cast<unsigned char>(*s)) - return false; - s++; - if (!*s) - return true; - if (chNext != static_cast<unsigned char>(*s)) - return false; - s++; - for (int n=2; *s; n++) { - if (*s != styler.SafeGetCharAt(currentPos+n, 0)) - return false; - s++; - } - return true; - } - // Non-inline - bool MatchIgnoreCase(const char *s); - void GetCurrent(char *s, Sci_PositionU len); - void GetCurrentLowered(char *s, Sci_PositionU len); -}; - -} - -#endif |