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/*
LESS mode - http://www.lesscss.org/
Ported to CodeMirror by Peter Kroon <plakroon@gmail.com>
Report bugs/issues here: https://github.com/marijnh/CodeMirror/issues GitHub: @peterkroon
*/
CodeMirror.defineMode("less", function(config) {
var indentUnit = config.indentUnit, type;
function ret(style, tp) {type = tp; return style;}
var selectors = /(^\:root$|^\:nth\-child$|^\:nth\-last\-child$|^\:nth\-of\-type$|^\:nth\-last\-of\-type$|^\:first\-child$|^\:last\-child$|^\:first\-of\-type$|^\:last\-of\-type$|^\:only\-child$|^\:only\-of\-type$|^\:empty$|^\:link|^\:visited$|^\:active$|^\:hover$|^\:focus$|^\:target$|^\:lang$|^\:enabled^\:disabled$|^\:checked$|^\:first\-line$|^\:first\-letter$|^\:before$|^\:after$|^\:not$|^\:required$|^\:invalid$)/;
function tokenBase(stream, state) {
var ch = stream.next();
if (ch == "@") {stream.eatWhile(/[\w\-]/); return ret("meta", stream.current());}
else if (ch == "/" && stream.eat("*")) {
state.tokenize = tokenCComment;
return tokenCComment(stream, state);
}
else if (ch == "<" && stream.eat("!")) {
state.tokenize = tokenSGMLComment;
return tokenSGMLComment(stream, state);
}
else if (ch == "=") ret(null, "compare");
else if (ch == "|" && stream.eat("=")) return ret(null, "compare");
else if (ch == "\"" || ch == "'") {
state.tokenize = tokenString(ch);
return state.tokenize(stream, state);
}
else if (ch == "/") { // e.g.: .png will not be parsed as a class
if(stream.eat("/")){
state.tokenize = tokenSComment;
return tokenSComment(stream, state);
}else{
if(type == "string" || type == "(")return ret("string", "string");
if(state.stack[state.stack.length-1] != undefined)return ret(null, ch);
stream.eatWhile(/[\a-zA-Z0-9\-_.\s]/);
if( /\/|\)|#/.test(stream.peek() || (stream.eatSpace() && stream.peek() == ")")) || stream.eol() )return ret("string", "string"); // let url(/images/logo.png) without quotes return as string
}
}
else if (ch == "!") {
stream.match(/^\s*\w*/);
return ret("keyword", "important");
}
else if (/\d/.test(ch)) {
stream.eatWhile(/[\w.%]/);
return ret("number", "unit");
}
else if (/[,+<>*\/]/.test(ch)) {
if(stream.peek() == "=" || type == "a")return ret("string", "string");
return ret(null, "select-op");
}
else if (/[;{}:\[\]()~\|]/.test(ch)) {
if(ch == ":"){
stream.eatWhile(/[a-z\\\-]/);
if( selectors.test(stream.current()) ){
return ret("tag", "tag");
}else if(stream.peek() == ":"){//::-webkit-search-decoration
stream.next();
stream.eatWhile(/[a-z\\\-]/);
if(stream.current().match(/\:\:\-(o|ms|moz|webkit)\-/))return ret("string", "string");
if( selectors.test(stream.current().substring(1)) )return ret("tag", "tag");
return ret(null, ch);
}else{
return ret(null, ch);
}
}else if(ch == "~"){
if(type == "r")return ret("string", "string");
}else{
return ret(null, ch);
}
}
else if (ch == ".") {
if(type == "(" || type == "string")return ret("string", "string"); // allow url(../image.png)
stream.eatWhile(/[\a-zA-Z0-9\-_]/);
if(stream.peek() == " ")stream.eatSpace();
if(stream.peek() == ")")return ret("number", "unit");//rgba(0,0,0,.25);
return ret("tag", "tag");
}
else if (ch == "#") {
//we don't eat white-space, we want the hex color and or id only
stream.eatWhile(/[A-Za-z0-9]/);
//check if there is a proper hex color length e.g. #eee || #eeeEEE
if(stream.current().length == 4 || stream.current().length == 7){
if(stream.current().match(/[A-Fa-f0-9]{6}|[A-Fa-f0-9]{3}/,false) != null){//is there a valid hex color value present in the current stream
//when not a valid hex value, parse as id
if(stream.current().substring(1) != stream.current().match(/[A-Fa-f0-9]{6}|[A-Fa-f0-9]{3}/,false))return ret("atom", "tag");
//eat white-space
stream.eatSpace();
//when hex value declaration doesn't end with [;,] but is does with a slash/cc comment treat it as an id, just like the other hex values that don't end with[;,]
if( /[\/<>.(){!$%^&*_\-\\?=+\|#'~`]/.test(stream.peek()) )return ret("atom", "tag");
//#time { color: #aaa }
else if(stream.peek() == "}" )return ret("number", "unit");
//we have a valid hex color value, parse as id whenever an element/class is defined after the hex(id) value e.g. #eee aaa || #eee .aaa
else if( /[a-zA-Z\\]/.test(stream.peek()) )return ret("atom", "tag");
//when a hex value is on the end of a line, parse as id
else if(stream.eol())return ret("atom", "tag");
//default
else return ret("number", "unit");
}else{//when not a valid hexvalue in the current stream e.g. #footer
stream.eatWhile(/[\w\\\-]/);
return ret("atom", "tag");
}
}else{//when not a valid hexvalue length
stream.eatWhile(/[\w\\\-]/);
return ret("atom", "tag");
}
}
else if (ch == "&") {
stream.eatWhile(/[\w\-]/);
return ret(null, ch);
}
else {
stream.eatWhile(/[\w\\\-_%.{]/);
if(type == "string"){
return ret("string", "string");
}else if(stream.current().match(/(^http$|^https$)/) != null){
stream.eatWhile(/[\w\\\-_%.{:\/]/);
return ret("string", "string");
}else if(stream.peek() == "<" || stream.peek() == ">"){
return ret("tag", "tag");
}else if( /\(/.test(stream.peek()) ){
return ret(null, ch);
}else if (stream.peek() == "/" && state.stack[state.stack.length-1] != undefined){ // url(dir/center/image.png)
return ret("string", "string");
}else if( stream.current().match(/\-\d|\-.\d/) ){ // match e.g.: -5px -0.4 etc... only colorize the minus sign
//commment out these 2 comment if you want the minus sign to be parsed as null -500px
//stream.backUp(stream.current().length-1);
//return ret(null, ch); //console.log( stream.current() );
return ret("number", "unit");
}else if( /\/|[\s\)]/.test(stream.peek() || stream.eol() || (stream.eatSpace() && stream.peek() == "/")) && stream.current().indexOf(".") !== -1){
if(stream.current().substring(stream.current().length-1,stream.current().length) == "{"){
stream.backUp(1);
return ret("tag", "tag");
}//end if
stream.eatSpace();
if( /[{<>.a-zA-Z\/]/.test(stream.peek()) || stream.eol() )return ret("tag", "tag"); // e.g. button.icon-plus
return ret("string", "string"); // let url(/images/logo.png) without quotes return as string
}else if( stream.eol() || stream.peek() == "[" || stream.peek() == "#" || type == "tag" ){
if(stream.current().substring(stream.current().length-1,stream.current().length) == "{")stream.backUp(1);
return ret("tag", "tag");
}else if(type == "compare" || type == "a" || type == "("){
return ret("string", "string");
}else if(type == "|" || stream.current() == "-" || type == "["){
return ret(null, ch);
}else if(stream.peek() == ":") {
stream.next();
var t_v = stream.peek() == ":" ? true : false;
if(!t_v){
var old_pos = stream.pos;
var sc = stream.current().length;
stream.eatWhile(/[a-z\\\-]/);
var new_pos = stream.pos;
if(stream.current().substring(sc-1).match(selectors) != null){
stream.backUp(new_pos-(old_pos-1));
return ret("tag", "tag");
} else stream.backUp(new_pos-(old_pos-1));
}else{
stream.backUp(1);
}
if(t_v)return ret("tag", "tag"); else return ret("variable", "variable");
}else{
return ret("variable", "variable");
}
}
}
function tokenSComment(stream, state) { // SComment = Slash comment
stream.skipToEnd();
state.tokenize = tokenBase;
return ret("comment", "comment");
}
function tokenCComment(stream, state) {
var maybeEnd = false, ch;
while ((ch = stream.next()) != null) {
if (maybeEnd && ch == "/") {
state.tokenize = tokenBase;
break;
}
maybeEnd = (ch == "*");
}
return ret("comment", "comment");
}
function tokenSGMLComment(stream, state) {
var dashes = 0, ch;
while ((ch = stream.next()) != null) {
if (dashes >= 2 && ch == ">") {
state.tokenize = tokenBase;
break;
}
dashes = (ch == "-") ? dashes + 1 : 0;
}
return ret("comment", "comment");
}
function tokenString(quote) {
return function(stream, state) {
var escaped = false, ch;
while ((ch = stream.next()) != null) {
if (ch == quote && !escaped)
break;
escaped = !escaped && ch == "\\";
}
if (!escaped) state.tokenize = tokenBase;
return ret("string", "string");
};
}
return {
startState: function(base) {
return {tokenize: tokenBase,
baseIndent: base || 0,
stack: []};
},
token: function(stream, state) {
if (stream.eatSpace()) return null;
var style = state.tokenize(stream, state);
var context = state.stack[state.stack.length-1];
if (type == "hash" && context == "rule") style = "atom";
else if (style == "variable") {
if (context == "rule") style = null; //"tag"
else if (!context || context == "@media{") {
style = stream.current() == "when" ? "variable" :
/[\s,|\s\)|\s]/.test(stream.peek()) ? "tag" : type;
}
}
if (context == "rule" && /^[\{\};]$/.test(type))
state.stack.pop();
if (type == "{") {
if (context == "@media") state.stack[state.stack.length-1] = "@media{";
else state.stack.push("{");
}
else if (type == "}") state.stack.pop();
else if (type == "@media") state.stack.push("@media");
else if (context == "{" && type != "comment") state.stack.push("rule");
return style;
},
indent: function(state, textAfter) {
var n = state.stack.length;
if (/^\}/.test(textAfter))
n -= state.stack[state.stack.length-1] == "rule" ? 2 : 1;
return state.baseIndent + n * indentUnit;
},
electricChars: "}"
};
});
CodeMirror.defineMIME("text/x-less", "less");
if (!CodeMirror.mimeModes.hasOwnProperty("text/css"))
CodeMirror.defineMIME("text/css", "less");
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