// 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 <stdio.h>
#include <stdarg.h>
#include <assert.h>
#include <ctype.h>
#include "ILexer.h"
#include "Scintilla.h"
#include "SciLexer.h"
#include "WordList.h"
#include "LexAccessor.h"
#include "Accessor.h"
#include "StyleContext.h"
#include "CharacterSet.h"
#include "LexerModule.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(Sci_PositionU startPos,
Sci_Position 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, Sci_Position pos, Sci_Position len) {
return len>1 && styler[pos]=='-' && styler[pos+1]=='-';
}
static void FoldEiffelDocIndent(Sci_PositionU startPos, Sci_Position length, int,
WordList *[], Accessor &styler) {
Sci_Position lengthDoc = startPos + length;
// Backtrack to previous line in case need to fix its fold status
Sci_Position 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 (Sci_Position 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(Sci_PositionU startPos, Sci_Position length, int /* initStyle */, WordList *[],
Accessor &styler) {
Sci_PositionU lengthDoc = startPos + length;
int visibleChars = 0;
Sci_Position 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 (Sci_PositionU 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];
Sci_PositionU 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);
