in ext/scintilla/lexers/LexCSS.cxx [75:503]
static void ColouriseCssDoc(Sci_PositionU startPos, Sci_Position length, int initStyle, WordList *keywordlists[], Accessor &styler) {
WordList &css1Props = *keywordlists[0];
WordList &pseudoClasses = *keywordlists[1];
WordList &css2Props = *keywordlists[2];
WordList &css3Props = *keywordlists[3];
WordList &pseudoElements = *keywordlists[4];
WordList &exProps = *keywordlists[5];
WordList &exPseudoClasses = *keywordlists[6];
WordList &exPseudoElements = *keywordlists[7];
StyleContext sc(startPos, length, initStyle, styler);
int lastState = -1; // before operator
int lastStateC = -1; // before comment
int lastStateS = -1; // before single-quoted/double-quoted string
int lastStateVar = -1; // before variable (SCSS)
int lastStateVal = -1; // before value (SCSS)
int op = ' '; // last operator
int opPrev = ' '; // last operator
bool insideParentheses = false; // true if currently in a CSS url() or similar construct
// property lexer.css.scss.language
// Set to 1 for Sassy CSS (.scss)
bool isScssDocument = styler.GetPropertyInt("lexer.css.scss.language") != 0;
// property lexer.css.less.language
// Set to 1 for Less CSS (.less)
bool isLessDocument = styler.GetPropertyInt("lexer.css.less.language") != 0;
// property lexer.css.hss.language
// Set to 1 for HSS (.hss)
bool isHssDocument = styler.GetPropertyInt("lexer.css.hss.language") != 0;
// SCSS/LESS/HSS have the concept of variable
bool hasVariables = isScssDocument || isLessDocument || isHssDocument;
char varPrefix = 0;
if (hasVariables)
varPrefix = isLessDocument ? '@' : '$';
// SCSS/LESS/HSS support single-line comments
typedef enum _CommentModes { eCommentBlock = 0, eCommentLine = 1} CommentMode;
CommentMode comment_mode = eCommentBlock;
bool hasSingleLineComments = isScssDocument || isLessDocument || isHssDocument;
// must keep track of nesting level in document types that support it (SCSS/LESS/HSS)
bool hasNesting = false;
int nestingLevel = 0;
if (isScssDocument || isLessDocument || isHssDocument) {
hasNesting = true;
nestingLevel = NestingLevelLookBehind(startPos, styler);
}
// "the loop"
for (; sc.More(); sc.Forward()) {
if (sc.state == SCE_CSS_COMMENT && ((comment_mode == eCommentBlock && sc.Match('*', '/')) || (comment_mode == eCommentLine && sc.atLineEnd))) {
if (lastStateC == -1) {
// backtrack to get last state:
// comments are like whitespace, so we must return to the previous state
Sci_PositionU i = startPos;
for (; i > 0; i--) {
if ((lastStateC = styler.StyleAt(i-1)) != SCE_CSS_COMMENT) {
if (lastStateC == SCE_CSS_OPERATOR) {
op = styler.SafeGetCharAt(i-1);
opPrev = styler.SafeGetCharAt(i-2);
while (--i) {
lastState = styler.StyleAt(i-1);
if (lastState != SCE_CSS_OPERATOR && lastState != SCE_CSS_COMMENT)
break;
}
if (i == 0)
lastState = SCE_CSS_DEFAULT;
}
break;
}
}
if (i == 0)
lastStateC = SCE_CSS_DEFAULT;
}
if (comment_mode == eCommentBlock) {
sc.Forward();
sc.ForwardSetState(lastStateC);
} else /* eCommentLine */ {
sc.SetState(lastStateC);
}
}
if (sc.state == SCE_CSS_COMMENT)
continue;
if (sc.state == SCE_CSS_DOUBLESTRING || sc.state == SCE_CSS_SINGLESTRING) {
if (sc.ch != (sc.state == SCE_CSS_DOUBLESTRING ? '\"' : '\''))
continue;
Sci_PositionU i = sc.currentPos;
while (i && styler[i-1] == '\\')
i--;
if ((sc.currentPos - i) % 2 == 1)
continue;
sc.ForwardSetState(lastStateS);
}
if (sc.state == SCE_CSS_OPERATOR) {
if (op == ' ') {
Sci_PositionU i = startPos;
op = styler.SafeGetCharAt(i-1);
opPrev = styler.SafeGetCharAt(i-2);
while (--i) {
lastState = styler.StyleAt(i-1);
if (lastState != SCE_CSS_OPERATOR && lastState != SCE_CSS_COMMENT)
break;
}
}
switch (op) {
case '@':
if (lastState == SCE_CSS_DEFAULT || hasNesting)
sc.SetState(SCE_CSS_DIRECTIVE);
break;
case '>':
case '+':
if (lastState == SCE_CSS_TAG || lastState == SCE_CSS_CLASS || lastState == SCE_CSS_ID ||
lastState == SCE_CSS_PSEUDOCLASS || lastState == SCE_CSS_EXTENDED_PSEUDOCLASS || lastState == SCE_CSS_UNKNOWN_PSEUDOCLASS)
sc.SetState(SCE_CSS_DEFAULT);
break;
case '[':
if (lastState == SCE_CSS_TAG || lastState == SCE_CSS_DEFAULT || lastState == SCE_CSS_CLASS || lastState == SCE_CSS_ID ||
lastState == SCE_CSS_PSEUDOCLASS || lastState == SCE_CSS_EXTENDED_PSEUDOCLASS || lastState == SCE_CSS_UNKNOWN_PSEUDOCLASS)
sc.SetState(SCE_CSS_ATTRIBUTE);
break;
case ']':
if (lastState == SCE_CSS_ATTRIBUTE)
sc.SetState(SCE_CSS_TAG);
break;
case '{':
nestingLevel++;
switch (lastState) {
case SCE_CSS_MEDIA:
sc.SetState(SCE_CSS_DEFAULT);
break;
case SCE_CSS_TAG:
case SCE_CSS_DIRECTIVE:
sc.SetState(SCE_CSS_IDENTIFIER);
break;
}
break;
case '}':
if (--nestingLevel < 0)
nestingLevel = 0;
switch (lastState) {
case SCE_CSS_DEFAULT:
case SCE_CSS_VALUE:
case SCE_CSS_IMPORTANT:
case SCE_CSS_IDENTIFIER:
case SCE_CSS_IDENTIFIER2:
case SCE_CSS_IDENTIFIER3:
if (hasNesting)
sc.SetState(nestingLevel > 0 ? SCE_CSS_IDENTIFIER : SCE_CSS_DEFAULT);
else
sc.SetState(SCE_CSS_DEFAULT);
break;
}
break;
case '(':
if (lastState == SCE_CSS_PSEUDOCLASS)
sc.SetState(SCE_CSS_TAG);
else if (lastState == SCE_CSS_EXTENDED_PSEUDOCLASS)
sc.SetState(SCE_CSS_EXTENDED_PSEUDOCLASS);
break;
case ')':
if (lastState == SCE_CSS_TAG || lastState == SCE_CSS_DEFAULT || lastState == SCE_CSS_CLASS || lastState == SCE_CSS_ID ||
lastState == SCE_CSS_PSEUDOCLASS || lastState == SCE_CSS_EXTENDED_PSEUDOCLASS || lastState == SCE_CSS_UNKNOWN_PSEUDOCLASS ||
lastState == SCE_CSS_PSEUDOELEMENT || lastState == SCE_CSS_EXTENDED_PSEUDOELEMENT)
sc.SetState(SCE_CSS_TAG);
break;
case ':':
switch (lastState) {
case SCE_CSS_TAG:
case SCE_CSS_DEFAULT:
case SCE_CSS_CLASS:
case SCE_CSS_ID:
case SCE_CSS_PSEUDOCLASS:
case SCE_CSS_EXTENDED_PSEUDOCLASS:
case SCE_CSS_UNKNOWN_PSEUDOCLASS:
case SCE_CSS_PSEUDOELEMENT:
case SCE_CSS_EXTENDED_PSEUDOELEMENT:
sc.SetState(SCE_CSS_PSEUDOCLASS);
break;
case SCE_CSS_IDENTIFIER:
case SCE_CSS_IDENTIFIER2:
case SCE_CSS_IDENTIFIER3:
case SCE_CSS_EXTENDED_IDENTIFIER:
case SCE_CSS_UNKNOWN_IDENTIFIER:
case SCE_CSS_VARIABLE:
sc.SetState(SCE_CSS_VALUE);
lastStateVal = lastState;
break;
}
break;
case '.':
if (lastState == SCE_CSS_TAG || lastState == SCE_CSS_DEFAULT || lastState == SCE_CSS_CLASS || lastState == SCE_CSS_ID ||
lastState == SCE_CSS_PSEUDOCLASS || lastState == SCE_CSS_EXTENDED_PSEUDOCLASS || lastState == SCE_CSS_UNKNOWN_PSEUDOCLASS)
sc.SetState(SCE_CSS_CLASS);
break;
case '#':
if (lastState == SCE_CSS_TAG || lastState == SCE_CSS_DEFAULT || lastState == SCE_CSS_CLASS || lastState == SCE_CSS_ID ||
lastState == SCE_CSS_PSEUDOCLASS || lastState == SCE_CSS_EXTENDED_PSEUDOCLASS || lastState == SCE_CSS_UNKNOWN_PSEUDOCLASS)
sc.SetState(SCE_CSS_ID);
break;
case ',':
case '|':
case '~':
if (lastState == SCE_CSS_TAG)
sc.SetState(SCE_CSS_DEFAULT);
break;
case ';':
switch (lastState) {
case SCE_CSS_DIRECTIVE:
if (hasNesting) {
sc.SetState(nestingLevel > 0 ? SCE_CSS_IDENTIFIER : SCE_CSS_DEFAULT);
} else {
sc.SetState(SCE_CSS_DEFAULT);
}
break;
case SCE_CSS_VALUE:
case SCE_CSS_IMPORTANT:
// data URLs can have semicolons; simplistically check for wrapping parentheses and move along
if (insideParentheses) {
sc.SetState(lastState);
} else {
if (lastStateVal == SCE_CSS_VARIABLE) {
sc.SetState(SCE_CSS_DEFAULT);
} else {
sc.SetState(SCE_CSS_IDENTIFIER);
}
}
break;
case SCE_CSS_VARIABLE:
if (lastStateVar == SCE_CSS_VALUE) {
// data URLs can have semicolons; simplistically check for wrapping parentheses and move along
if (insideParentheses) {
sc.SetState(SCE_CSS_VALUE);
} else {
sc.SetState(SCE_CSS_IDENTIFIER);
}
} else {
sc.SetState(SCE_CSS_DEFAULT);
}
break;
}
break;
case '!':
if (lastState == SCE_CSS_VALUE)
sc.SetState(SCE_CSS_IMPORTANT);
break;
}
}
if (sc.ch == '*' && sc.state == SCE_CSS_DEFAULT) {
sc.SetState(SCE_CSS_TAG);
continue;
}
// check for inside parentheses (whether part of an "operator" or not)
if (sc.ch == '(')
insideParentheses = true;
else if (sc.ch == ')')
insideParentheses = false;
// SCSS special modes
if (hasVariables) {
// variable name
if (sc.ch == varPrefix) {
switch (sc.state) {
case SCE_CSS_DEFAULT:
if (isLessDocument) // give priority to pseudo elements
break;
// Falls through.
case SCE_CSS_VALUE:
lastStateVar = sc.state;
sc.SetState(SCE_CSS_VARIABLE);
continue;
}
}
if (sc.state == SCE_CSS_VARIABLE) {
if (IsAWordChar(sc.ch)) {
// still looking at the variable name
continue;
}
if (lastStateVar == SCE_CSS_VALUE) {
// not looking at the variable name any more, and it was part of a value
sc.SetState(SCE_CSS_VALUE);
}
}
// nested rule parent selector
if (sc.ch == '&') {
switch (sc.state) {
case SCE_CSS_DEFAULT:
case SCE_CSS_IDENTIFIER:
sc.SetState(SCE_CSS_TAG);
continue;
}
}
}
// nesting rules that apply to SCSS and Less
if (hasNesting) {
// check for nested rule selector
if (sc.state == SCE_CSS_IDENTIFIER && (IsAWordChar(sc.ch) || sc.ch == ':' || sc.ch == '.' || sc.ch == '#')) {
// look ahead to see whether { comes before next ; and }
Sci_PositionU endPos = startPos + length;
int ch;
for (Sci_PositionU i = sc.currentPos; i < endPos; i++) {
ch = styler.SafeGetCharAt(i);
if (ch == ';' || ch == '}')
break;
if (ch == '{') {
sc.SetState(SCE_CSS_DEFAULT);
continue;
}
}
}
}
if (IsAWordChar(sc.ch)) {
if (sc.state == SCE_CSS_DEFAULT)
sc.SetState(SCE_CSS_TAG);
continue;
}
if (IsAWordChar(sc.chPrev) && (
sc.state == SCE_CSS_IDENTIFIER || sc.state == SCE_CSS_IDENTIFIER2 ||
sc.state == SCE_CSS_IDENTIFIER3 || sc.state == SCE_CSS_EXTENDED_IDENTIFIER ||
sc.state == SCE_CSS_UNKNOWN_IDENTIFIER ||
sc.state == SCE_CSS_PSEUDOCLASS || sc.state == SCE_CSS_PSEUDOELEMENT ||
sc.state == SCE_CSS_EXTENDED_PSEUDOCLASS || sc.state == SCE_CSS_EXTENDED_PSEUDOELEMENT ||
sc.state == SCE_CSS_UNKNOWN_PSEUDOCLASS ||
sc.state == SCE_CSS_IMPORTANT ||
sc.state == SCE_CSS_DIRECTIVE
)) {
char s[100];
sc.GetCurrentLowered(s, sizeof(s));
char *s2 = s;
while (*s2 && !IsAWordChar(*s2))
s2++;
switch (sc.state) {
case SCE_CSS_IDENTIFIER:
case SCE_CSS_IDENTIFIER2:
case SCE_CSS_IDENTIFIER3:
case SCE_CSS_EXTENDED_IDENTIFIER:
case SCE_CSS_UNKNOWN_IDENTIFIER:
if (css1Props.InList(s2))
sc.ChangeState(SCE_CSS_IDENTIFIER);
else if (css2Props.InList(s2))
sc.ChangeState(SCE_CSS_IDENTIFIER2);
else if (css3Props.InList(s2))
sc.ChangeState(SCE_CSS_IDENTIFIER3);
else if (exProps.InList(s2))
sc.ChangeState(SCE_CSS_EXTENDED_IDENTIFIER);
else
sc.ChangeState(SCE_CSS_UNKNOWN_IDENTIFIER);
break;
case SCE_CSS_PSEUDOCLASS:
case SCE_CSS_PSEUDOELEMENT:
case SCE_CSS_EXTENDED_PSEUDOCLASS:
case SCE_CSS_EXTENDED_PSEUDOELEMENT:
case SCE_CSS_UNKNOWN_PSEUDOCLASS:
if (op == ':' && opPrev != ':' && pseudoClasses.InList(s2))
sc.ChangeState(SCE_CSS_PSEUDOCLASS);
else if (opPrev == ':' && pseudoElements.InList(s2))
sc.ChangeState(SCE_CSS_PSEUDOELEMENT);
else if ((op == ':' || (op == '(' && lastState == SCE_CSS_EXTENDED_PSEUDOCLASS)) && opPrev != ':' && exPseudoClasses.InList(s2))
sc.ChangeState(SCE_CSS_EXTENDED_PSEUDOCLASS);
else if (opPrev == ':' && exPseudoElements.InList(s2))
sc.ChangeState(SCE_CSS_EXTENDED_PSEUDOELEMENT);
else
sc.ChangeState(SCE_CSS_UNKNOWN_PSEUDOCLASS);
break;
case SCE_CSS_IMPORTANT:
if (strcmp(s2, "important") != 0)
sc.ChangeState(SCE_CSS_VALUE);
break;
case SCE_CSS_DIRECTIVE:
if (op == '@' && strcmp(s2, "media") == 0)
sc.ChangeState(SCE_CSS_MEDIA);
break;
}
}
if (sc.ch != '.' && sc.ch != ':' && sc.ch != '#' && (
sc.state == SCE_CSS_CLASS || sc.state == SCE_CSS_ID ||
(sc.ch != '(' && sc.ch != ')' && ( /* This line of the condition makes it possible to extend pseudo-classes with parentheses */
sc.state == SCE_CSS_PSEUDOCLASS || sc.state == SCE_CSS_PSEUDOELEMENT ||
sc.state == SCE_CSS_EXTENDED_PSEUDOCLASS || sc.state == SCE_CSS_EXTENDED_PSEUDOELEMENT ||
sc.state == SCE_CSS_UNKNOWN_PSEUDOCLASS
))
))
sc.SetState(SCE_CSS_TAG);
if (sc.Match('/', '*')) {
lastStateC = sc.state;
comment_mode = eCommentBlock;
sc.SetState(SCE_CSS_COMMENT);
sc.Forward();
} else if (hasSingleLineComments && sc.Match('/', '/') && !insideParentheses) {
// note that we've had to treat ([...]// as the start of a URL not a comment, e.g. url(http://example.com), url(//example.com)
lastStateC = sc.state;
comment_mode = eCommentLine;
sc.SetState(SCE_CSS_COMMENT);
sc.Forward();
} else if ((sc.state == SCE_CSS_VALUE || sc.state == SCE_CSS_ATTRIBUTE)
&& (sc.ch == '\"' || sc.ch == '\'')) {
lastStateS = sc.state;
sc.SetState((sc.ch == '\"' ? SCE_CSS_DOUBLESTRING : SCE_CSS_SINGLESTRING));
} else if (IsCssOperator(sc.ch)
&& (sc.state != SCE_CSS_ATTRIBUTE || sc.ch == ']')
&& (sc.state != SCE_CSS_VALUE || sc.ch == ';' || sc.ch == '}' || sc.ch == '!')
&& ((sc.state != SCE_CSS_DIRECTIVE && sc.state != SCE_CSS_MEDIA) || sc.ch == ';' || sc.ch == '{')
) {
if (sc.state != SCE_CSS_OPERATOR)
lastState = sc.state;
sc.SetState(SCE_CSS_OPERATOR);
op = sc.ch;
opPrev = sc.chPrev;
}
}
sc.Complete();
}