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Diffstat (limited to 'src/LexLout.cpp')
| -rwxr-xr-x | src/LexLout.cpp | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/src/LexLout.cpp b/src/LexLout.cpp new file mode 100755 index 0000000..9d1a45a --- /dev/null +++ b/src/LexLout.cpp @@ -0,0 +1,208 @@ +// Scintilla source code edit control +/** @file LexLout.cxx + ** Lexer for the Basser Lout (>= version 3) typesetting language + **/ +// Copyright 2003 by Kein-Hong Man <mkh@pl.jaring.my> +// The License.txt file describes the conditions under which this software may be distributed. + +#include <stdlib.h> +#include <string.h> +#include <ctype.h> +#include <stdio.h> +#include <stdarg.h> + +#include "Platform.h" + +#include "PropSet.h" +#include "Accessor.h" +#include "StyleContext.h" +#include "KeyWords.h" +#include "Scintilla.h" +#include "SciLexer.h" + +static inline bool IsAWordChar(const int ch) { + return (ch < 0x80) && (isalpha(ch) || ch == '@' || ch == '_'); +} + +static inline bool IsAnOther(const int ch) { + return (ch < 0x80) && (ch == '{' || ch == '}' || + ch == '!' || ch == '$' || ch == '%' || ch == '&' || ch == '\'' || + ch == '(' || ch == ')' || ch == '*' || ch == '+' || ch == ',' || + ch == '-' || ch == '.' || ch == '/' || ch == ':' || ch == ';' || + ch == '<' || ch == '=' || ch == '>' || ch == '?' || ch == '[' || + ch == ']' || ch == '^' || ch == '`' || ch == '|' || ch == '~'); +} + +static void ColouriseLoutDoc(unsigned int startPos, int length, int initStyle, + WordList *keywordlists[], Accessor &styler) { + + WordList &keywords = *keywordlists[0]; + WordList &keywords2 = *keywordlists[1]; + WordList &keywords3 = *keywordlists[2]; + + int visibleChars = 0; + int firstWordInLine = 0; + int leadingAtSign = 0; + + StyleContext sc(startPos, length, initStyle, styler); + + for (; sc.More(); sc.Forward()) { + + if (sc.atLineStart && (sc.state == SCE_LOUT_STRING)) { + // Prevent SCE_LOUT_STRINGEOL from leaking back to previous line + sc.SetState(SCE_LOUT_STRING); + } + + // Determine if the current state should terminate. + if (sc.state == SCE_LOUT_COMMENT) { + if (sc.atLineEnd) { + sc.SetState(SCE_LOUT_DEFAULT); + visibleChars = 0; + } + } else if (sc.state == SCE_LOUT_NUMBER) { + if (!IsADigit(sc.ch) && sc.ch != '.') { + sc.SetState(SCE_LOUT_DEFAULT); + } + } else if (sc.state == SCE_LOUT_STRING) { + if (sc.ch == '\\') { + if (sc.chNext == '\"' || sc.chNext == '\\') { + sc.Forward(); + } + } else if (sc.ch == '\"') { + sc.ForwardSetState(SCE_LOUT_DEFAULT); + } else if (sc.atLineEnd) { + sc.ChangeState(SCE_LOUT_STRINGEOL); + sc.ForwardSetState(SCE_LOUT_DEFAULT); + visibleChars = 0; + } + } else if (sc.state == SCE_LOUT_IDENTIFIER) { + if (!IsAWordChar(sc.ch)) { + char s[100]; + sc.GetCurrent(s, sizeof(s)); + + if (leadingAtSign) { + if (keywords.InList(s)) { + sc.ChangeState(SCE_LOUT_WORD); + } else { + sc.ChangeState(SCE_LOUT_WORD4); + } + } else if (firstWordInLine && keywords3.InList(s)) { + sc.ChangeState(SCE_LOUT_WORD3); + } + sc.SetState(SCE_LOUT_DEFAULT); + } + } else if (sc.state == SCE_LOUT_OPERATOR) { + if (!IsAnOther(sc.ch)) { + char s[100]; + sc.GetCurrent(s, sizeof(s)); + + if (keywords2.InList(s)) { + sc.ChangeState(SCE_LOUT_WORD2); + } + sc.SetState(SCE_LOUT_DEFAULT); + } + } + + // Determine if a new state should be entered. + if (sc.state == SCE_LOUT_DEFAULT) { + if (sc.ch == '#') { + sc.SetState(SCE_LOUT_COMMENT); + } else if (sc.ch == '\"') { + sc.SetState(SCE_LOUT_STRING); + } else if (IsADigit(sc.ch) || + (sc.ch == '.' && IsADigit(sc.chNext))) { + sc.SetState(SCE_LOUT_NUMBER); + } else if (IsAWordChar(sc.ch)) { + firstWordInLine = (visibleChars == 0); + leadingAtSign = (sc.ch == '@'); + sc.SetState(SCE_LOUT_IDENTIFIER); + } else if (IsAnOther(sc.ch)) { + sc.SetState(SCE_LOUT_OPERATOR); + } + } + + if (sc.atLineEnd) { + // Reset states to begining of colourise so no surprises + // if different sets of lines lexed. + visibleChars = 0; + } + if (!IsASpace(sc.ch)) { + visibleChars++; + } + } + sc.Complete(); +} + +static void FoldLoutDoc(unsigned int startPos, int length, int, WordList *[], + Accessor &styler) { + + unsigned int endPos = startPos + length; + int visibleChars = 0; + int lineCurrent = styler.GetLine(startPos); + int levelPrev = styler.LevelAt(lineCurrent) & SC_FOLDLEVELNUMBERMASK; + int levelCurrent = levelPrev; + char chNext = styler[startPos]; + bool foldCompact = styler.GetPropertyInt("fold.compact", 1) != 0; + int styleNext = styler.StyleAt(startPos); + char s[10]; + + for (unsigned int i = startPos; i < endPos; i++) { + char ch = chNext; + chNext = styler.SafeGetCharAt(i + 1); + int style = styleNext; + styleNext = styler.StyleAt(i + 1); + bool atEOL = (ch == '\r' && chNext != '\n') || (ch == '\n'); + + if (style == SCE_LOUT_WORD) { + if (ch == '@') { + for (unsigned int j = 0; j < 8; j++) { + if (!IsAWordChar(styler[i + j])) { + break; + } + s[j] = styler[i + j]; + s[j + 1] = '\0'; + } + if (strcmp(s, "@Begin") == 0) { + levelCurrent++; + } else if (strcmp(s, "@End") == 0) { + levelCurrent--; + } + } + } else if (style == SCE_LOUT_OPERATOR) { + if (ch == '{') { + levelCurrent++; + } else if (ch == '}') { + levelCurrent--; + } + } + if (atEOL) { + int lev = levelPrev; + if (visibleChars == 0 && foldCompact) { + lev |= SC_FOLDLEVELWHITEFLAG; + } + if ((levelCurrent > levelPrev) && (visibleChars > 0)) { + lev |= SC_FOLDLEVELHEADERFLAG; + } + if (lev != styler.LevelAt(lineCurrent)) { + styler.SetLevel(lineCurrent, lev); + } + lineCurrent++; + levelPrev = levelCurrent; + visibleChars = 0; + } + if (!isspacechar(ch)) + visibleChars++; + } + // Fill in the real level of the next line, keeping the current flags as they will be filled in later + int flagsNext = styler.LevelAt(lineCurrent) & ~SC_FOLDLEVELNUMBERMASK; + styler.SetLevel(lineCurrent, levelPrev | flagsNext); +} + +static const char * const loutWordLists[] = { + "Predefined identifiers", + "Predefined delimiters", + "Predefined keywords", + 0, + }; + +LexerModule lmLout(SCLEX_LOUT, ColouriseLoutDoc, "lout", FoldLoutDoc, loutWordLists); |