upgrade editor.md(many bug exists)

static/editor.md/lib/codemirror/addon/fold/foldcode.js

@@ -1,5 +1,5 @@
 // CodeMirror, copyright (c) by Marijn Haverbeke and others
-// Distributed under an MIT license: http://codemirror.net/LICENSE
+// Distributed under an MIT license: https://codemirror.net/LICENSE
 
 (function(mod) {
   if (typeof exports == "object" && typeof module == "object") // CommonJS
@@ -24,9 +24,11 @@
     function getRange(allowFolded) {
       var range = finder(cm, pos);
       if (!range || range.to.line - range.from.line < minSize) return null;
+      if (force === "fold") return range;
+
       var marks = cm.findMarksAt(range.from);
       for (var i = 0; i < marks.length; ++i) {
-        if (marks[i].__isFold && force !== "fold") {
+        if (marks[i].__isFold) {
           if (!allowFolded) return null;
           range.cleared = true;
           marks[i].clear();
@@ -42,14 +44,14 @@
     }
     if (!range || range.cleared || force === "unfold") return;
 
-    var myWidget = makeWidget(cm, options);
+    var myWidget = makeWidget(cm, options, range);
     CodeMirror.on(myWidget, "mousedown", function(e) {
       myRange.clear();
       CodeMirror.e_preventDefault(e);
     });
     var myRange = cm.markText(range.from, range.to, {
       replacedWith: myWidget,
-      clearOnEnter: true,
+      clearOnEnter: getOption(cm, options, "clearOnEnter"),
       __isFold: true
     });
     myRange.on("clear", function(from, to) {
@@ -58,13 +60,20 @@
     CodeMirror.signal(cm, "fold", cm, range.from, range.to);
   }
 
-  function makeWidget(cm, options) {
+  function makeWidget(cm, options, range) {
     var widget = getOption(cm, options, "widget");
+
+    if (typeof widget == "function") {
+      widget = widget(range.from, range.to);
+    }
+
     if (typeof widget == "string") {
       var text = document.createTextNode(widget);
       widget = document.createElement("span");
       widget.appendChild(text);
       widget.className = "CodeMirror-foldmarker";
+    } else if (widget) {
+      widget = widget.cloneNode(true)
     }
     return widget;
   }
@@ -92,18 +101,18 @@
     cm.foldCode(cm.getCursor(), null, "fold");
   };
   CodeMirror.commands.unfold = function(cm) {
-    cm.foldCode(cm.getCursor(), null, "unfold");
+    cm.foldCode(cm.getCursor(), { scanUp: false }, "unfold");
   };
   CodeMirror.commands.foldAll = function(cm) {
     cm.operation(function() {
       for (var i = cm.firstLine(), e = cm.lastLine(); i <= e; i++)
-        cm.foldCode(CodeMirror.Pos(i, 0), null, "fold");
+        cm.foldCode(CodeMirror.Pos(i, 0), { scanUp: false }, "fold");
     });
   };
   CodeMirror.commands.unfoldAll = function(cm) {
     cm.operation(function() {
       for (var i = cm.firstLine(), e = cm.lastLine(); i <= e; i++)
-        cm.foldCode(CodeMirror.Pos(i, 0), null, "unfold");
+        cm.foldCode(CodeMirror.Pos(i, 0), { scanUp: false }, "unfold");
     });
   };
 
@@ -129,7 +138,8 @@
     rangeFinder: CodeMirror.fold.auto,
     widget: "\u2194",
     minFoldSize: 0,
-    scanUp: false
+    scanUp: false,
+    clearOnEnter: true
   };
 
   CodeMirror.defineOption("foldOptions", null);