in ext/scintilla/lexers/LexCoffeeScript.cxx [104:337]
static void ColouriseCoffeeScriptDoc(Sci_PositionU startPos, Sci_Position length, int initStyle, WordList *keywordlists[],
Accessor &styler) {
WordList &keywords = *keywordlists[0];
WordList &keywords2 = *keywordlists[1];
WordList &keywords4 = *keywordlists[3];
CharacterSet setOKBeforeRE(CharacterSet::setNone, "([{=,:;!%^&*|?~+-");
CharacterSet setCouldBePostOp(CharacterSet::setNone, "+-");
CharacterSet setWordStart(CharacterSet::setAlpha, "_$@", 0x80, true);
CharacterSet setWord(CharacterSet::setAlphaNum, "._$", 0x80, true);
int chPrevNonWhite = ' ';
int visibleChars = 0;
// String/Regex interpolation variables, based on LexRuby.cxx.
// In most cases a value of 2 should be ample for the code the user is
// likely to enter. For example,
// "Filling the #{container} with #{liquid}..."
// from the CoffeeScript homepage nests to a level of 2
// If the user actually hits a 6th occurrence of '#{' in a double-quoted
// string (including regexes), it will stay as a string. The problem with
// this is that quotes might flip, a 7th '#{' will look like a comment,
// and code-folding might be wrong.
#define INNER_STRINGS_MAX_COUNT 5
// These vars track our instances of "...#{,,,'..#{,,,}...',,,}..."
int inner_string_types[INNER_STRINGS_MAX_COUNT];
// Track # braces when we push a new #{ thing
int inner_expn_brace_counts[INNER_STRINGS_MAX_COUNT];
int inner_string_count = 0;
int brace_counts = 0; // Number of #{ ... } things within an expression
for (int i = 0; i < INNER_STRINGS_MAX_COUNT; i++) {
inner_string_types[i] = 0;
inner_expn_brace_counts[i] = 0;
}
// look back to set chPrevNonWhite properly for better regex colouring
Sci_Position endPos = startPos + length;
if (startPos > 0 && IsSpaceEquiv(initStyle)) {
Sci_PositionU back = startPos;
styler.Flush();
while (back > 0 && IsSpaceEquiv(styler.StyleAt(--back)))
;
if (styler.StyleAt(back) == SCE_COFFEESCRIPT_OPERATOR) {
chPrevNonWhite = styler.SafeGetCharAt(back);
}
if (startPos != back) {
initStyle = styler.StyleAt(back);
if (IsSpaceEquiv(initStyle)) {
initStyle = SCE_COFFEESCRIPT_DEFAULT;
}
}
startPos = back;
}
StyleContext sc(startPos, endPos - startPos, initStyle, styler);
for (; sc.More();) {
if (sc.atLineStart) {
// Reset states to beginning of colourise so no surprises
// if different sets of lines lexed.
visibleChars = 0;
}
// Determine if the current state should terminate.
switch (sc.state) {
case SCE_COFFEESCRIPT_OPERATOR:
sc.SetState(SCE_COFFEESCRIPT_DEFAULT);
break;
case SCE_COFFEESCRIPT_NUMBER:
// We accept almost anything because of hex. and number suffixes
if (!setWord.Contains(sc.ch) || sc.Match('.', '.')) {
sc.SetState(SCE_COFFEESCRIPT_DEFAULT);
}
break;
case SCE_COFFEESCRIPT_IDENTIFIER:
if (!setWord.Contains(sc.ch) || (sc.ch == '.') || (sc.ch == '$')) {
char s[1000];
sc.GetCurrent(s, sizeof(s));
if (keywords.InList(s)) {
sc.ChangeState(SCE_COFFEESCRIPT_WORD);
} else if (keywords2.InList(s)) {
sc.ChangeState(SCE_COFFEESCRIPT_WORD2);
} else if (keywords4.InList(s)) {
sc.ChangeState(SCE_COFFEESCRIPT_GLOBALCLASS);
} else if (sc.LengthCurrent() > 0 && s[0] == '@') {
sc.ChangeState(SCE_COFFEESCRIPT_INSTANCEPROPERTY);
}
sc.SetState(SCE_COFFEESCRIPT_DEFAULT);
}
break;
case SCE_COFFEESCRIPT_WORD:
case SCE_COFFEESCRIPT_WORD2:
case SCE_COFFEESCRIPT_GLOBALCLASS:
case SCE_COFFEESCRIPT_INSTANCEPROPERTY:
if (!setWord.Contains(sc.ch)) {
sc.SetState(SCE_COFFEESCRIPT_DEFAULT);
}
break;
case SCE_COFFEESCRIPT_COMMENTLINE:
if (sc.atLineStart) {
sc.SetState(SCE_COFFEESCRIPT_DEFAULT);
}
break;
case SCE_COFFEESCRIPT_STRING:
if (sc.ch == '\\') {
if (sc.chNext == '\"' || sc.chNext == '\'' || sc.chNext == '\\') {
sc.Forward();
}
} else if (sc.ch == '\"') {
sc.ForwardSetState(SCE_COFFEESCRIPT_DEFAULT);
} else if (sc.ch == '#' && sc.chNext == '{' && inner_string_count < INNER_STRINGS_MAX_COUNT) {
// process interpolated code #{ ... }
enterInnerExpression(inner_string_types,
inner_expn_brace_counts,
inner_string_count,
sc.state,
brace_counts);
sc.SetState(SCE_COFFEESCRIPT_OPERATOR);
sc.ForwardSetState(SCE_COFFEESCRIPT_DEFAULT);
}
break;
case SCE_COFFEESCRIPT_CHARACTER:
if (sc.ch == '\\') {
if (sc.chNext == '\"' || sc.chNext == '\'' || sc.chNext == '\\') {
sc.Forward();
}
} else if (sc.ch == '\'') {
sc.ForwardSetState(SCE_COFFEESCRIPT_DEFAULT);
}
break;
case SCE_COFFEESCRIPT_REGEX:
if (sc.atLineStart) {
sc.SetState(SCE_COFFEESCRIPT_DEFAULT);
} else if (sc.ch == '/') {
sc.Forward();
while ((sc.ch < 0x80) && islower(sc.ch))
sc.Forward(); // gobble regex flags
sc.SetState(SCE_COFFEESCRIPT_DEFAULT);
} else if (sc.ch == '\\') {
// Gobble up the quoted character
if (sc.chNext == '\\' || sc.chNext == '/') {
sc.Forward();
}
}
break;
case SCE_COFFEESCRIPT_STRINGEOL:
if (sc.atLineStart) {
sc.SetState(SCE_COFFEESCRIPT_DEFAULT);
}
break;
case SCE_COFFEESCRIPT_COMMENTBLOCK:
if (sc.Match("###")) {
sc.Forward();
sc.Forward();
sc.ForwardSetState(SCE_COFFEESCRIPT_DEFAULT);
} else if (sc.ch == '\\') {
sc.Forward();
}
break;
case SCE_COFFEESCRIPT_VERBOSE_REGEX:
if (sc.Match("///")) {
sc.Forward();
sc.Forward();
sc.ForwardSetState(SCE_COFFEESCRIPT_DEFAULT);
} else if (sc.Match('#')) {
sc.SetState(SCE_COFFEESCRIPT_VERBOSE_REGEX_COMMENT);
} else if (sc.ch == '\\') {
sc.Forward();
}
break;
case SCE_COFFEESCRIPT_VERBOSE_REGEX_COMMENT:
if (sc.atLineStart) {
sc.SetState(SCE_COFFEESCRIPT_VERBOSE_REGEX);
}
break;
}
// Determine if a new state should be entered.
if (sc.state == SCE_COFFEESCRIPT_DEFAULT) {
if (IsADigit(sc.ch) || (sc.ch == '.' && IsADigit(sc.chNext))) {
sc.SetState(SCE_COFFEESCRIPT_NUMBER);
} else if (setWordStart.Contains(sc.ch)) {
sc.SetState(SCE_COFFEESCRIPT_IDENTIFIER);
} else if (sc.Match("///")) {
sc.SetState(SCE_COFFEESCRIPT_VERBOSE_REGEX);
sc.Forward();
sc.Forward();
} else if (sc.ch == '/'
&& (setOKBeforeRE.Contains(chPrevNonWhite)
|| followsKeyword(sc, styler))
&& (!setCouldBePostOp.Contains(chPrevNonWhite)
|| !FollowsPostfixOperator(sc, styler))) {
sc.SetState(SCE_COFFEESCRIPT_REGEX); // JavaScript's RegEx
} else if (sc.ch == '\"') {
sc.SetState(SCE_COFFEESCRIPT_STRING);
} else if (sc.ch == '\'') {
sc.SetState(SCE_COFFEESCRIPT_CHARACTER);
} else if (sc.ch == '#') {
if (sc.Match("###")) {
sc.SetState(SCE_COFFEESCRIPT_COMMENTBLOCK);
sc.Forward();
sc.Forward();
} else {
sc.SetState(SCE_COFFEESCRIPT_COMMENTLINE);
}
} else if (isoperator(static_cast<char>(sc.ch))) {
sc.SetState(SCE_COFFEESCRIPT_OPERATOR);
// Handle '..' and '...' operators correctly.
if (sc.ch == '.') {
for (int i = 0; i < 2 && sc.chNext == '.'; i++, sc.Forward()) ;
} else if (sc.ch == '{') {
++brace_counts;
} else if (sc.ch == '}' && --brace_counts <= 0 && inner_string_count > 0) {
// Return to previous state before #{ ... }
sc.ForwardSetState(exitInnerExpression(inner_string_types,
inner_expn_brace_counts,
inner_string_count,
brace_counts));
continue; // skip sc.Forward() at loop end
}
}
}
if (!IsASpace(sc.ch) && !IsSpaceEquiv(sc.state)) {
chPrevNonWhite = sc.ch;
visibleChars++;
}
sc.Forward();
}
sc.Complete();
}