Editor toggle-fold event toggles the largest fold at the cursor position

spec/app/editor-spec.coffee

@@ -2457,6 +2457,19 @@ describe "Editor", ->
         editor.trigger "toggle-fold"
         expect(editor.screenLineForRow(1).fold).toBeUndefined()
 
+      it "creates/destroys the largest fold containing the cursor position", ->
+        editor.trigger "fold-all"
+        editor.setCursorBufferPosition([5,1])
+
+        editor.trigger "toggle-fold"
+        expect(editor.screenLineForRow(0).fold).toBeUndefined()
+        expect(editor.screenLineForRow(1).fold).toBeDefined()
+
+        editor.trigger "toggle-fold"
+        expect(editor.screenLineForRow(0).fold).toBeUndefined()
+        expect(editor.screenLineForRow(1).fold).toBeUndefined()
+        expect(editor.screenLineForRow(4).fold).toBeDefined()
+
     describe "when a fold-all event is triggered", ->
       it "creates folds on every line that can be folded", ->
         editor.setCursorBufferPosition([5,13])
@@ -2465,6 +2478,11 @@ describe "Editor", ->
         expect(editor.screenLineForRow(0).fold).toBeDefined()
         expect(editor.screenLineForRow(1)).toBeUndefined()
 
+      it "maintains cursor buffer position when buffer is created/destroyed", ->
+        editor.setCursorBufferPosition([5,5])
+        editor.trigger "fold-all"
+        expect(editor.getCursorBufferPosition()).toEqual([5,5])
+
   describe "primitive folding", ->
     beforeEach ->
       editor.setBuffer(new Buffer(require.resolve('fixtures/two-hundred.txt')))

src/app/editor.coffee

@@ -810,7 +810,8 @@ class Editor extends View
     @renderer.foldAll()
 
   toggleFold: ->
-    @renderer.toggleFoldAtBufferRow(@getCursorBufferPosition().row)
+    row = @renderer.bufferPositionForScreenPosition(@getCursorScreenPosition()).row
+    @renderer.toggleFoldAtBufferRow(row)
 
   foldSelection: -> @getSelection().fold()