fix #1337 bad interaction of removeFolds and updateWrapData

lib/ace/edit_session.js

@@ -1642,6 +1642,7 @@ var EditSession = function(text, mode) {
             len = lastRow - firstRow;
         }
 
+        this.$updating = true;
         if (len != 0) {
             if (action.indexOf("remove") != -1) {
                 this[useWrapMode ? "$wrapData" : "$rowLengthCache"].splice(firstRow, len);
@@ -1734,6 +1735,7 @@ var EditSession = function(text, mode) {
         if (useWrapMode && this.$wrapData.length != this.doc.getLength()) {
             console.error("doc.getLength() and $wrapData.length have to be the same!");
         }
+        this.$updating = false;
 
         if (useWrapMode)
             this.$updateWrapData(firstRow, lastRow);

lib/ace/edit_session/folding.js

@@ -384,10 +384,12 @@ function Folding() {
             newFoldLine.start.column = folds[0].start.column;
         }
 
+        if (!this.$updating) {
             if (this.$useWrapMode)
                 this.$updateWrapData(startRow, endRow);
             else
                 this.$updateRowLengthCache(startRow, endRow);
+        }
         
         // Notify that fold data has changed.
         this.$modified = true;

lib/ace/edit_session_test.js

@@ -900,6 +900,24 @@ module.exports = {
         return session;
     },
     
+    "test delete fold with wrap enabled": function() {
+        var session = new EditSession("");
+        session.setValue([
+            "This is some placeholder text that will be folded inline.",
+            "This is some placeholder text that will be folded inline.",
+            "More text.",
+            "<p>The cursor in this paragraph text will be offset by 1 row.<p>",
+            "<p>Everything after this will be offset as well due to the folds in the row before too.</p>"
+        ].join("\n"));
+        session.addFold('...', new Range(0, 8, 0, 42));
+        session.addFold('...', new Range(1, 8, 1, 42));
+        session.addFold('...', new Range(3, 7, 3, 51));
+        session.setOption("wrap", 40);        
+        session.remove(new Range(0,0, 2, 5));
+        
+        assert.equal(session.$wrapData + "", [[], [], [40, 76]] + "");
+    },
+        
     "test add fold": function() {
         var session = createFoldTestSession();
         var fold;

lib/ace/editor.js

@@ -1364,6 +1364,7 @@ var Editor = function(renderer, session) {
         var sel = this.selection;
         var doc = this.session;
         var range = sel.getRange();
+        var reverse = sel.isBackwards();
         if (range.isEmpty()) {
             var row = range.start.row;
             doc.duplicateLines(row, row);