(function (){ 
"use strict"; 
function doFold(cm, pos, options, force){ 
var finder = options && (options.call? options: options.rangeFinder); 
if (!finder) finder = cm.getHelper(pos, "fold"); 
if (!finder) return ; 
if (typeof pos == "number") pos = CodeMirror.Pos(pos, 0); 
var minSize = options && options.minFoldSize || 0; 
function getRange(allowFolded){ 
var range = finder(cm, pos); 
if (!range || range.to.line - range.from.line < minSize) return null ; 
var marks = cm.findMarksAt(range.from); 
for (var i = 0; 
i < _AN_Read_length("length", marks); ++i){ 
if (marks[i].__isFold && force !== "fold") { 
if (!allowFolded) return null ; 
range.cleared = true ; 
_AN_Call_clear("clear", marks[i]); 
} 
} 
return range; 
} 
var range = getRange(true ); 
if (options && options.scanUp) while (!range && pos.line > cm.firstLine()){ 
pos = CodeMirror.Pos(pos.line - 1, 0); 
range = getRange(false ); 
} 
if (!range || range.cleared || force === "unfold") return ; 
var myWidget = makeWidget(options); 
CodeMirror.on(myWidget, "mousedown", function (){ 
_AN_Call_clear("clear", myRange); 
} 
); 
var myRange = cm.markText(range.from, range.to, { 
replacedWith: myWidget,
clearOnEnter: true ,
__isFold: true }
); 
myRange.on("clear", function (from, to){ 
CodeMirror.signal(cm, "unfold", cm, from, to); 
} 
); 
CodeMirror.signal(cm, "fold", cm, range.from, range.to); 
} 
function makeWidget(options){ 
var widget = (options && options.widget) || "\u2194"; 
if (typeof widget == "string") { 
var text = document.createTextNode(widget); 
widget = _AN_Call_createelement("createElement", document, "span"); 
_AN_Call_appendchild("appendChild", widget, text); 
widget.className = "CodeMirror-foldmarker"; 
} 
return widget; 
} 
CodeMirror.newFoldFunction = function (rangeFinder, widget){ 
return function (cm, pos){ 
doFold(cm, pos, { 
rangeFinder: rangeFinder,
widget: widget}
); 
} 
; 
} 
; 
CodeMirror.defineExtension("foldCode", function (pos, options, force){ 
doFold(this, pos, options, force); 
} 
); 
CodeMirror.registerHelper("fold", "combine", function (){ 
var funcs = Array.prototype.slice.call(arguments, 0); 
return function (cm, start){ 
for (var i = 0; 
i < _AN_Read_length("length", funcs); ++i){ 
var found = funcs[i](cm, start); 
if (found) return found; 
} 
} 
; 
} 
); 
} 
)();