240 lines
7.4 KiB
C++
Executable File
240 lines
7.4 KiB
C++
Executable File
// 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"
|
|
|
|
using namespace Scintilla;
|
|
|
|
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);
|