diff options
Diffstat (limited to 'lexers/LexEiffel.cxx')
| -rw-r--r-- | lexers/LexEiffel.cxx | 238 |
1 files changed, 238 insertions, 0 deletions
diff --git a/lexers/LexEiffel.cxx b/lexers/LexEiffel.cxx new file mode 100644 index 000000000..03dea5e73 --- /dev/null +++ b/lexers/LexEiffel.cxx @@ -0,0 +1,238 @@ +// Scintilla source code edit control +/** @file LexEiffel.cxx + ** Lexer for Eiffel. + **/ +// Copyright 1998-2001 by Neil Hodgson <neilh@scintilla.org> +// The License.txt file describes the conditions under which this software may be distributed. + +#include <stdlib.h> +#include <string.h> +#include <ctype.h> +#include <stdarg.h> +#include <stdio.h> + +#include "Platform.h" + +#include "PropSet.h" +#include "Accessor.h" +#include "StyleContext.h" +#include "KeyWords.h" +#include "Scintilla.h" +#include "SciLexer.h" + +#ifdef SCI_NAMESPACE +using namespace Scintilla; +#endif + +static inline bool isEiffelOperator(unsigned int ch) { + // '.' left out as it is used to make up numbers + return 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 inline bool IsAWordChar(unsigned int ch) { + return (ch < 0x80) && (isalnum(ch) || ch == '_'); +} + +static inline bool IsAWordStart(unsigned int ch) { + return (ch < 0x80) && (isalnum(ch) || ch == '_'); +} + +static void ColouriseEiffelDoc(unsigned int startPos, + int length, + int initStyle, + WordList *keywordlists[], + Accessor &styler) { + + WordList &keywords = *keywordlists[0]; + + StyleContext sc(startPos, length, initStyle, styler); + + for (; sc.More(); sc.Forward()) { + + if (sc.state == SCE_EIFFEL_STRINGEOL) { + if (sc.ch != '\r' && sc.ch != '\n') { + sc.SetState(SCE_EIFFEL_DEFAULT); + } + } else if (sc.state == SCE_EIFFEL_OPERATOR) { + sc.SetState(SCE_EIFFEL_DEFAULT); + } else if (sc.state == SCE_EIFFEL_WORD) { + if (!IsAWordChar(sc.ch)) { + char s[100]; + sc.GetCurrentLowered(s, sizeof(s)); + if (!keywords.InList(s)) { + sc.ChangeState(SCE_EIFFEL_IDENTIFIER); + } + sc.SetState(SCE_EIFFEL_DEFAULT); + } + } else if (sc.state == SCE_EIFFEL_NUMBER) { + if (!IsAWordChar(sc.ch)) { + sc.SetState(SCE_EIFFEL_DEFAULT); + } + } else if (sc.state == SCE_EIFFEL_COMMENTLINE) { + if (sc.ch == '\r' || sc.ch == '\n') { + sc.SetState(SCE_EIFFEL_DEFAULT); + } + } else if (sc.state == SCE_EIFFEL_STRING) { + if (sc.ch == '%') { + sc.Forward(); + } else if (sc.ch == '\"') { + sc.Forward(); + sc.SetState(SCE_EIFFEL_DEFAULT); + } + } else if (sc.state == SCE_EIFFEL_CHARACTER) { + if (sc.ch == '\r' || sc.ch == '\n') { + sc.SetState(SCE_EIFFEL_STRINGEOL); + } else if (sc.ch == '%') { + sc.Forward(); + } else if (sc.ch == '\'') { + sc.Forward(); + sc.SetState(SCE_EIFFEL_DEFAULT); + } + } + + if (sc.state == SCE_EIFFEL_DEFAULT) { + if (sc.ch == '-' && sc.chNext == '-') { + sc.SetState(SCE_EIFFEL_COMMENTLINE); + } else if (sc.ch == '\"') { + sc.SetState(SCE_EIFFEL_STRING); + } else if (sc.ch == '\'') { + sc.SetState(SCE_EIFFEL_CHARACTER); + } else if (IsADigit(sc.ch) || (sc.ch == '.')) { + sc.SetState(SCE_EIFFEL_NUMBER); + } else if (IsAWordStart(sc.ch)) { + sc.SetState(SCE_EIFFEL_WORD); + } else if (isEiffelOperator(sc.ch)) { + sc.SetState(SCE_EIFFEL_OPERATOR); + } + } + } + sc.Complete(); +} + +static bool IsEiffelComment(Accessor &styler, int pos, int len) { + return len>1 && styler[pos]=='-' && styler[pos+1]=='-'; +} + +static void FoldEiffelDocIndent(unsigned int startPos, int length, int, + WordList *[], Accessor &styler) { + int lengthDoc = startPos + length; + + // Backtrack to previous line in case need to fix its fold status + int lineCurrent = styler.GetLine(startPos); + if (startPos > 0) { + if (lineCurrent > 0) { + lineCurrent--; + startPos = styler.LineStart(lineCurrent); + } + } + int spaceFlags = 0; + int indentCurrent = styler.IndentAmount(lineCurrent, &spaceFlags, IsEiffelComment); + char chNext = styler[startPos]; + for (int i = startPos; i < lengthDoc; i++) { + char ch = chNext; + chNext = styler.SafeGetCharAt(i + 1); + + if ((ch == '\r' && chNext != '\n') || (ch == '\n') || (i == lengthDoc)) { + int lev = indentCurrent; + int indentNext = styler.IndentAmount(lineCurrent + 1, &spaceFlags, IsEiffelComment); + if (!(indentCurrent & SC_FOLDLEVELWHITEFLAG)) { + // Only non whitespace lines can be headers + if ((indentCurrent & SC_FOLDLEVELNUMBERMASK) < (indentNext & SC_FOLDLEVELNUMBERMASK)) { + lev |= SC_FOLDLEVELHEADERFLAG; + } else if (indentNext & SC_FOLDLEVELWHITEFLAG) { + // Line after is blank so check the next - maybe should continue further? + int spaceFlags2 = 0; + int indentNext2 = styler.IndentAmount(lineCurrent + 2, &spaceFlags2, IsEiffelComment); + if ((indentCurrent & SC_FOLDLEVELNUMBERMASK) < (indentNext2 & SC_FOLDLEVELNUMBERMASK)) { + lev |= SC_FOLDLEVELHEADERFLAG; + } + } + } + indentCurrent = indentNext; + styler.SetLevel(lineCurrent, lev); + lineCurrent++; + } + } +} + +static void FoldEiffelDocKeyWords(unsigned int startPos, int length, int /* initStyle */, WordList *[], + Accessor &styler) { + unsigned int lengthDoc = startPos + length; + int visibleChars = 0; + int lineCurrent = styler.GetLine(startPos); + int levelPrev = styler.LevelAt(lineCurrent) & SC_FOLDLEVELNUMBERMASK; + int levelCurrent = levelPrev; + char chNext = styler[startPos]; + int stylePrev = 0; + int styleNext = styler.StyleAt(startPos); + // lastDeferred should be determined by looking back to last keyword in case + // the "deferred" is on a line before "class" + bool lastDeferred = false; + for (unsigned int i = startPos; i < lengthDoc; 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 ((stylePrev != SCE_EIFFEL_WORD) && (style == SCE_EIFFEL_WORD)) { + char s[20]; + unsigned int j = 0; + while ((j < (sizeof(s) - 1)) && (iswordchar(styler[i + j]))) { + s[j] = styler[i + j]; + j++; + } + s[j] = '\0'; + + if ( + (strcmp(s, "check") == 0) || + (strcmp(s, "debug") == 0) || + (strcmp(s, "deferred") == 0) || + (strcmp(s, "do") == 0) || + (strcmp(s, "from") == 0) || + (strcmp(s, "if") == 0) || + (strcmp(s, "inspect") == 0) || + (strcmp(s, "once") == 0) + ) + levelCurrent++; + if (!lastDeferred && (strcmp(s, "class") == 0)) + levelCurrent++; + if (strcmp(s, "end") == 0) + levelCurrent--; + lastDeferred = strcmp(s, "deferred") == 0; + } + + if (atEOL) { + int lev = levelPrev; + if (visibleChars == 0) + 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++; + stylePrev = style; + } + // 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 eiffelWordListDesc[] = { + "Keywords", + 0 +}; + +LexerModule lmEiffel(SCLEX_EIFFEL, ColouriseEiffelDoc, "eiffel", FoldEiffelDocIndent, eiffelWordListDesc); +LexerModule lmEiffelkw(SCLEX_EIFFELKW, ColouriseEiffelDoc, "eiffelkw", FoldEiffelDocKeyWords, eiffelWordListDesc); |