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// Scintilla source code edit control
/** @file LexCPP.cxx
** Lexer for C++, C, Java, and Javascript.
**/
// 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 <stdio.h>
#include <stdarg.h>
#include "Platform.h"
#include "PropSet.h"
#include "Accessor.h"
#include "KeyWords.h"
#include "Scintilla.h"
#include "SciLexer.h"
static bool classifyWordCpp(unsigned int start, unsigned int end, WordList &keywords, Accessor &styler) {
PLATFORM_ASSERT(end >= start);
char s[100];
for (unsigned int i = 0; (i < end - start + 1) && (i < 30); i++) {
s[i] = styler[start + i];
s[i + 1] = '\0';
}
bool wordIsUUID = false;
char chAttr = SCE_C_IDENTIFIER;
if (isdigit(s[0]) || (s[0] == '.'))
chAttr = SCE_C_NUMBER;
else {
if (keywords.InList(s)) {
chAttr = SCE_C_WORD;
wordIsUUID = strcmp(s, "uuid") == 0;
}
}
styler.ColourTo(end, chAttr);
return wordIsUUID;
}
static bool isOKBeforeRE(char ch) {
return (ch == '(') || (ch == '=') || (ch == ',');
}
static void ColouriseCppDoc(unsigned int startPos, int length, int initStyle, WordList *keywordlists[],
Accessor &styler) {
WordList &keywords = *keywordlists[0];
styler.StartAt(startPos);
bool stylingWithinPreprocessor = styler.GetPropertyInt("styling.within.preprocessor");
//int lineCurrent = styler.GetLine(startPos);
int state = initStyle;
int styleBeforeLineStart = initStyle;
if (state == SCE_C_STRINGEOL) // Does not leak onto next line
state = SCE_C_DEFAULT;
char chPrev = ' ';
char chNext = styler[startPos];
char chPrevNonWhite = ' ';
unsigned int lengthDoc = startPos + length;
int visibleChars = 0;
styler.StartSegment(startPos);
bool lastWordWasUUID = false;
for (unsigned int i = startPos; i < lengthDoc; i++) {
char ch = chNext;
chNext = styler.SafeGetCharAt(i + 1);
bool atEOL = (ch == '\r' && chNext != '\n') || (ch == '\n');
if (atEOL) {
// Trigger on CR only (Mac style) or either on LF from CR+LF (Dos/Win) or on LF alone (Unix)
// Avoid triggering two times on Dos/Win
// End of line
if (state == SCE_C_STRINGEOL) {
styler.ColourTo(i, state);
state = SCE_C_DEFAULT;
}
}
if (styler.IsLeadByte(ch)) {
chNext = styler.SafeGetCharAt(i + 2);
chPrev = ' ';
i += 1;
continue;
}
if (state == SCE_C_DEFAULT) {
if (ch == '@' && chNext == '\"') {
styler.ColourTo(i - 1, state);
state = SCE_C_VERBATIM;
i++;
ch = chNext;
chNext = styler.SafeGetCharAt(i + 1);
} else if (iswordstart(ch) || (ch == '@')) {
styler.ColourTo(i - 1, state);
if (lastWordWasUUID) {
state = SCE_C_UUID;
lastWordWasUUID = false;
} else {
state = SCE_C_IDENTIFIER;
}
} else if (ch == '/' && chNext == '*') {
styler.ColourTo(i - 1, state);
if (styler.SafeGetCharAt(i + 2) == '*' ||
styler.SafeGetCharAt(i + 2) == '!') // Support of Qt/Doxygen doc. style
state = SCE_C_COMMENTDOC;
else
state = SCE_C_COMMENT;
} else if (ch == '/' && chNext == '/') {
styler.ColourTo(i - 1, state);
if (styler.SafeGetCharAt(i + 2) == '/' ||
styler.SafeGetCharAt(i + 2) == '!') // Support of Qt/Doxygen doc. style
state = SCE_C_COMMENTLINEDOC;
else
state = SCE_C_COMMENTLINE;
} else if (ch == '/' && isOKBeforeRE(chPrevNonWhite)) {
styler.ColourTo(i - 1, state);
state = SCE_C_REGEX;
} else if (ch == '\"') {
styler.ColourTo(i - 1, state);
state = SCE_C_STRING;
} else if (ch == '\'') {
styler.ColourTo(i - 1, state);
state = SCE_C_CHARACTER;
} else if (ch == '#' && visibleChars == 0) {
// Preprocessor commands are alone on their line
styler.ColourTo(i - 1, state);
state = SCE_C_PREPROCESSOR;
// Skip whitespace between # and preprocessor word
do {
i++;
ch = chNext;
chNext = styler.SafeGetCharAt(i + 1);
} while (isspacechar(ch) && (i < lengthDoc));
} else if (isoperator(ch)) {
styler.ColourTo(i-1, state);
styler.ColourTo(i, SCE_C_OPERATOR);
}
} else if (state == SCE_C_IDENTIFIER) {
if (!iswordchar(ch)) {
lastWordWasUUID = classifyWordCpp(styler.GetStartSegment(), i - 1, keywords, styler);
state = SCE_C_DEFAULT;
if (ch == '/' && chNext == '*') {
if (styler.SafeGetCharAt(i + 2) == '*')
state = SCE_C_COMMENTDOC;
else
state = SCE_C_COMMENT;
} else if (ch == '/' && chNext == '/') {
state = SCE_C_COMMENTLINE;
} else if (ch == '\"') {
state = SCE_C_STRING;
} else if (ch == '\'') {
state = SCE_C_CHARACTER;
} else if (isoperator(ch)) {
styler.ColourTo(i, SCE_C_OPERATOR);
}
}
} else {
if (state == SCE_C_PREPROCESSOR) {
if (stylingWithinPreprocessor) {
if (isspacechar(ch)) {
styler.ColourTo(i - 1, state);
state = SCE_C_DEFAULT;
}
} else {
if (atEOL && (chPrev != '\\')) {
styler.ColourTo(i - 1, state);
state = SCE_C_DEFAULT;
}
}
} else if (state == SCE_C_COMMENT) {
if (ch == '/' && chPrev == '*') {
if (((i > styler.GetStartSegment() + 2) || (
(styleBeforeLineStart == SCE_C_COMMENT) &&
(i > styler.GetStartSegment())))) {
styler.ColourTo(i, state);
state = SCE_C_DEFAULT;
}
}
} else if (state == SCE_C_COMMENTDOC) {
if (ch == '/' && chPrev == '*') {
if (((i > styler.GetStartSegment() + 2) || (
(styleBeforeLineStart == SCE_C_COMMENTDOC) &&
(i > styler.GetStartSegment())))) {
styler.ColourTo(i, state);
state = SCE_C_DEFAULT;
}
}
} else if (state == SCE_C_COMMENTLINE || state == SCE_C_COMMENTLINEDOC) {
if (ch == '\r' || ch == '\n') {
styler.ColourTo(i - 1, state);
state = SCE_C_DEFAULT;
}
} else if (state == SCE_C_STRING) {
if (ch == '\\') {
if (chNext == '\"' || chNext == '\'' || chNext == '\\') {
i++;
ch = chNext;
chNext = styler.SafeGetCharAt(i + 1);
}
} else if (ch == '\"') {
styler.ColourTo(i, state);
state = SCE_C_DEFAULT;
} else if ((chNext == '\r' || chNext == '\n') && (chPrev != '\\')) {
styler.ColourTo(i - 1, SCE_C_STRINGEOL);
state = SCE_C_STRINGEOL;
}
} else if (state == SCE_C_CHARACTER) {
if ((ch == '\r' || ch == '\n') && (chPrev != '\\')) {
styler.ColourTo(i - 1, SCE_C_STRINGEOL);
state = SCE_C_STRINGEOL;
} else if (ch == '\\') {
if (chNext == '\"' || chNext == '\'' || chNext == '\\') {
i++;
ch = chNext;
chNext = styler.SafeGetCharAt(i + 1);
}
} else if (ch == '\'') {
styler.ColourTo(i, state);
state = SCE_C_DEFAULT;
}
} else if (state == SCE_C_REGEX) {
if (ch == '\r' || ch == '\n' || ch == '/') {
styler.ColourTo(i, state);
state = SCE_C_DEFAULT;
} else if (ch == '\\') {
// Gobble up the quoted character
if (chNext == '\\' || chNext == '/') {
i++;
ch = chNext;
chNext = styler.SafeGetCharAt(i + 1);
}
}
} else if (state == SCE_C_VERBATIM) {
if (ch == '\"') {
if (chNext == '\"') {
i++;
ch = chNext;
chNext = styler.SafeGetCharAt(i + 1);
} else {
styler.ColourTo(i, state);
state = SCE_C_DEFAULT;
}
}
} else if (state == SCE_C_UUID) {
if (ch == '\r' || ch == '\n' || ch == ')') {
styler.ColourTo(i - 1, state);
if (ch == ')')
styler.ColourTo(i, SCE_C_OPERATOR);
state = SCE_C_DEFAULT;
}
}
}
if (atEOL) {
styleBeforeLineStart = state;
visibleChars = 0;
}
if (!isspacechar(ch))
visibleChars++;
chPrev = ch;
if (ch != ' ' && ch != '\t')
chPrevNonWhite = ch;
}
styler.ColourTo(lengthDoc - 1, state);
}
static void FoldCppDoc(unsigned int startPos, int length, int initStyle, WordList *[],
Accessor &styler) {
bool foldComment = styler.GetPropertyInt("fold.comment");
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 styleNext = styler.StyleAt(startPos);
int style = initStyle;
for (unsigned int i = startPos; i < lengthDoc; i++) {
char ch = chNext;
chNext = styler.SafeGetCharAt(i + 1);
int stylePrev = style;
style = styleNext;
styleNext = styler.StyleAt(i + 1);
bool atEOL = (ch == '\r' && chNext != '\n') || (ch == '\n');
if (foldComment &&
(style == SCE_C_COMMENT || style == SCE_C_COMMENTDOC)) {
if (style != stylePrev) {
levelCurrent++;
} else if ((style != styleNext) && !atEOL) {
// Comments don't end at end of line and the next character may be unstyled.
levelCurrent--;
}
}
if (style == SCE_C_OPERATOR) {
if (ch == '{') {
levelCurrent++;
} else if (ch == '}') {
levelCurrent--;
}
}
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++;
}
// 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);
}
LexerModule lmCPP(SCLEX_CPP, ColouriseCppDoc, "cpp", FoldCppDoc);
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