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Diffstat (limited to 'src/LexLua.cxx')
| -rw-r--r-- | src/LexLua.cxx | 298 |
1 files changed, 298 insertions, 0 deletions
diff --git a/src/LexLua.cxx b/src/LexLua.cxx new file mode 100644 index 000000000..e6da7668d --- /dev/null +++ b/src/LexLua.cxx @@ -0,0 +1,298 @@ +// LexLua.cxx - lexer for Lua language +// Written by Paul Winwood + +#include <stdlib.h> +#include <string.h> +#include <ctype.h> +#include <stdarg.h> +#include <stdio.h> +#include <fcntl.h> + +#include "Platform.h" + +#include "PropSet.h" +#include "Accessor.h" +#include "KeyWords.h" +#include "Scintilla.h" +#include "SciLexer.h" + +static void classifyWordLua(unsigned int start, unsigned int end, WordList &keywords, Accessor &styler) +{ + char s[100]; + bool wordIsNumber = isdigit(styler[start]) || (styler[start] == '.'); + + for (unsigned int i = 0; i < end - start + 1 && i < 30; i++) + { + s[i] = styler[start + i]; + s[i + 1] = '\0'; + } + + char chAttr = SCE_LUA_IDENTIFIER; + + if (wordIsNumber) + chAttr = SCE_LUA_NUMBER; + else + { + if (keywords.InList(s)) + { + chAttr = SCE_LUA_WORD; + } + } + styler.ColourTo(end, chAttr); +} + +static void ColouriseLuaDoc(unsigned int startPos, + int length, + int initStyle, + WordList *keywordlists[], + Accessor &styler) +{ + + WordList &keywords = *keywordlists[0]; + + styler.StartAt(startPos); + styler.GetLine(startPos); + + int state = initStyle; + char chPrev = ' '; + char chNext = styler[startPos]; + unsigned int lengthDoc = startPos + length; + bool firstChar = true; + int literalString = 0; + + styler.StartSegment(startPos); + for (unsigned int i = startPos; i <= lengthDoc; i++) + { + char ch = chNext; + chNext = styler.SafeGetCharAt(i + 1); + + if (styler.IsLeadByte(ch)) + { + chNext = styler.SafeGetCharAt(i + 2); + chPrev = ' '; + i += 1; + continue; + } + + if (state == SCE_LUA_STRINGEOL) + { + if (ch != '\r' && ch != '\n') + { + styler.ColourTo(i-1, state); + state = SCE_LUA_DEFAULT; + } + } + + if (state == SCE_LUA_LITERALSTRING && ch == '[' && chNext == '[') + { + literalString++; + } + else + if (state == SCE_LUA_DEFAULT) + { + if (ch == '-' && chNext == '-') + { + styler.ColourTo(i-1, state); + state = SCE_LUA_COMMENTLINE; + } + else + if (ch == '[' && chNext == '[') + { + state = SCE_LUA_LITERALSTRING; + literalString = 1; + } + else + if (iswordstart(ch)) + { + styler.ColourTo(i-1, state); + state = SCE_LUA_WORD; + } + else + if (ch == '\"') + { + styler.ColourTo(i-1, state); + state = SCE_LUA_STRING; + } + else + if (ch == '\'') + { + styler.ColourTo(i-1, state); + state = SCE_LUA_CHARACTER; + } + else + if (ch == '$' && firstChar) + { + styler.ColourTo(i-1, state); + state = SCE_LUA_PREPROCESSOR; + } + else + if (isoperator(ch)) + { + styler.ColourTo(i-1, state); + styler.ColourTo(i, SCE_LUA_OPERATOR); + } + } + else + if (state == SCE_LUA_WORD) + { + if (!iswordchar(ch)) + { + classifyWordLua(styler.GetStartSegment(), i - 1, keywords, styler); + state = SCE_LUA_DEFAULT; + if (ch == '[' && chNext == '[') + { + literalString = 1; + state = SCE_LUA_LITERALSTRING; + } + else + if (ch == '-' && chNext == '-') + { + state = SCE_LUA_COMMENTLINE; + } + else + if (ch == '\"') + { + state = SCE_LUA_STRING; + } + else + if (ch == '\'') + { + state = SCE_LUA_CHARACTER; + } + else + if (ch == '$' && firstChar) + { + state = SCE_LUA_PREPROCESSOR; + } + else + if (isoperator(ch)) + { + styler.ColourTo(i, SCE_LUA_OPERATOR); + } + } + } + else + { + if (state == SCE_LUA_LITERALSTRING) + { + if (ch == ']' && (chPrev == ']') && (--literalString == 0)) + { + styler.ColourTo(i, state); + state = SCE_LUA_DEFAULT; + } + } + else + if (state == SCE_LUA_PREPROCESSOR) + { + if ((ch == '\r' || ch == '\n') && (chPrev != '\\')) + { + styler.ColourTo(i-1, state); + state = SCE_LUA_DEFAULT; + } + } + else + if (state == SCE_LUA_COMMENTLINE) + { + if (ch == '\r' || ch == '\n') + { + styler.ColourTo(i-1, state); + state = SCE_LUA_DEFAULT; + } + } + else + if (state == SCE_LUA_STRING) + { + if ((ch == '\r' || ch == '\n') && (chPrev != '\\')) + { + styler.ColourTo(i-1, state); + state = SCE_LUA_STRINGEOL; + } + else + if (ch == '\\') + { + if (chNext == '\"' || chNext == '\\') + { + i++; + ch = chNext; + chNext = styler.SafeGetCharAt(i + 1); + } + } + else + if (ch == '\"') + { + styler.ColourTo(i, state); + state = SCE_LUA_DEFAULT; + i++; + ch = chNext; + chNext = styler.SafeGetCharAt(i + 1); + } + } + else + if (state == SCE_LUA_CHARACTER) + { + if ((ch == '\r' || ch == '\n') && (chPrev != '\\')) + { + styler.ColourTo(i-1, state); + state = SCE_LUA_STRINGEOL; + } + else + if (ch == '\\') + { + if (chNext == '\'' || chNext == '\\') + { + i++; + ch = chNext; + chNext = styler.SafeGetCharAt(i + 1); + } + } + else + if (ch == '\'') + { + styler.ColourTo(i, state); + state = SCE_LUA_DEFAULT; + i++; + ch = chNext; + chNext = styler.SafeGetCharAt(i + 1); + } + } + + if (state == SCE_LUA_DEFAULT) + { + if (ch == '-' && chNext == '-') + { + state = SCE_LUA_COMMENTLINE; + } + else + if (ch == '\"') + { + state = SCE_LUA_STRING; + } + else + if (ch == '\'') + { + state = SCE_LUA_CHARACTER; + } + else + if (ch == '$' && firstChar) + { + state = SCE_LUA_PREPROCESSOR; + } + else + if (iswordstart(ch)) + { + state = SCE_LUA_WORD; + } + else + if (isoperator(ch)) + { + styler.ColourTo(i, SCE_LUA_OPERATOR); + } + } + } + chPrev = ch; + firstChar = (ch == '\r' || ch == '\n'); + } + styler.ColourTo(lengthDoc - 1, state); +} + +LexerModule lmLua(SCLEX_LUA, ColouriseLuaDoc); |