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CodeMirror.multiplexingMode = function(outer /*, others */) {
// Others should be {open, close, mode [, delimStyle]} objects
var others = Array.prototype.slice.call(arguments, 1);
var n_others = others.length;
return {
startState: function() {
return {
outer: CodeMirror.startState(outer),
innerActive: null,
inner: null
};
},
copyState: function(state) {
return {
outer: CodeMirror.copyState(outer, state.outer),
innerActive: state.innerActive,
inner: state.innerActive && CodeMirror.copyState(state.innerActive.mode, state.inner)
};
},
token: function(stream, state) {
if (!state.innerActive) {
for (var i = 0; i < n_others; ++i) {
var other = others[i];
if (stream.match(other.open)) {
state.innerActive = other;
state.inner = CodeMirror.startState(other.mode);
return other.delimStyle;
}
}
var outerToken = outer.token(stream, state.outer);
var cur = stream.current();
for (var i = 0; i < n_others; ++i) {
var other = others[i], found = cur.indexOf(other.open);
if (found > -1) {
stream.backUp(cur.length - found);
cur = cur.slice(0, found);
}
}
return outerToken;
} else {
var curInner = state.innerActive;
if (stream.match(curInner.close)) {
state.innerActive = state.inner = null;
return curInner.delimStyle;
}
var innerToken = curInner.mode.token(stream, state.inner);
var cur = stream.current(), found = cur.indexOf(curInner.close);
if (found > -1) stream.backUp(cur.length - found);
return innerToken;
}
},
indent: function(state, textAfter) {
var mode = state.innerActive || outer;
if (!mode.indent) return CodeMirror.Pass;
return mode.indent(state.innerActive ? state.inner : state.outer, textAfter);
},
compareStates: function(a, b) {
if (a.innerActive != b.innerActive) return false;
var mode = a.innerActive || outer;
if (!mode.compareStates) return CodeMirror.Pass;
return mode.compareStates(a.innerActive ? a.inner : a.outer,
b.innerActive ? b.inner : b.outer);
},
electricChars: outer.electricChars
};
};
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