--- /dev/null
+(function() {
+ "use strict";
+
+ function doFold(cm, pos, options) {
+ 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 < marks.length; ++i) {
+ if (marks[i].__isFold) {
+ if (!allowFolded) return null;
+ range.cleared = true;
+ marks[i].clear();
+ }
+ }
+ 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) return;
+
+ var myWidget = makeWidget(options);
+ CodeMirror.on(myWidget, "mousedown", function() { myRange.clear(); });
+ 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 = document.createElement("span");
+ widget.appendChild(text);
+ widget.className = "CodeMirror-foldmarker";
+ }
+ return widget;
+ }
+
+ // Clumsy backwards-compatible interface
+ CodeMirror.newFoldFunction = function(rangeFinder, widget) {
+ return function(cm, pos) { doFold(cm, pos, {rangeFinder: rangeFinder, widget: widget}); };
+ };
+
+ // New-style interface
+ CodeMirror.defineExtension("foldCode", function(pos, options) { doFold(this, pos, options); });
+
+ CodeMirror.registerHelper("fold", "combine", function() {
+ var funcs = Array.prototype.slice.call(arguments, 0);
+ return function(cm, start) {
+ for (var i = 0; i < funcs.length; ++i) {
+ var found = funcs[i](cm, start);
+ if (found) return found;
+ }
+ };
+ });
+})();