Move IE-style domline creation into the domline file.

src/static/js/ace2_inner.js

@@ -2800,69 +2800,7 @@ function Ace2Inner(){
 
   function doCreateDomLine(nonEmpty)
   {
-    if (browser.msie && (!nonEmpty))
+    return domline.createDomLine(nonEmpty, doesWrap, browser, doc);
-    {
-      var result = {
-        node: null,
-        appendSpan: noop,
-        prepareForAdd: noop,
-        notifyAdded: noop,
-        clearSpans: noop,
-        finishUpdate: noop,
-        lineMarker: 0
-      };
-
-      var lineElem = doc.createElement("div");
-      result.node = lineElem;
-
-      result.notifyAdded = function()
-      {
-        // magic -- settng an empty div's innerHTML to the empty string
-        // keeps it from collapsing.  Apparently innerHTML must be set *after*
-        // adding the node to the DOM.
-        // Such a div is what IE 6 creates naturally when you make a blank line
-        // in a document of divs.  However, when copy-and-pasted the div will
-        // contain a space, so we note its emptiness with a property.
-        lineElem.innerHTML = " "; // Frist we set a value that isnt blank
-        // a primitive-valued property survives copy-and-paste
-        setAssoc(lineElem, "shouldBeEmpty", true);
-        // an object property doesn't
-        setAssoc(lineElem, "unpasted", {});
-        lineElem.innerHTML = ""; // Then we make it blank..  New line and no space = Awesome :)
-      };
-      var lineClass = 'ace-line';
-      result.appendSpan = function(txt, cls)
-      {
-        if ((!txt) && cls)
-        {
-          // gain a whole-line style (currently to show insertion point in CSS)
-          lineClass = domline.addToLineClass(lineClass, cls);
-        }
-        // otherwise, ignore appendSpan, this is an empty line
-      };
-      result.clearSpans = function()
-      {
-        lineClass = ''; // non-null to cause update
-      };
-
-      var writeClass = function()
-      {
-        if (lineClass !== null) lineElem.className = lineClass;
-      };
-      
-      result.prepareForAdd = writeClass;
-      result.finishUpdate = writeClass;
-      result.getInnerHTML = function()
-      {
-        return "";
-      };
-
-      return result;
-    }
-    else
-    {
-      return domline.createDomLine(nonEmpty, doesWrap, browser, doc);
-    }
   }
 
   function textify(str)

src/static/js/domline.js

@@ -249,9 +249,71 @@ DOMLine.prototype = {};
 
 }).call(DOMLine.prototype);
 
-domline.createDomLine = function(nonEmpty, doesWrap, optBrowser, optDocument)
+function SpecialIEDOMLine(nonEmpty, doesWrap, browser, document) {
+  this.node = null;
+  this.lineMarker = 0;
+  this.node = document.createElement("div")
+
+  this.lineClass = 'ace-line';
+
+  // Apparently overridden at the instance level sometimes...
+  this.notifyAdded = function () {this._notifyAdded()};
+  this.finishUpdate = function () {this._finishUpdate()};;
+}
+SpecialIEDOMLine.prototype = {};
+(function () {
+  this._notifyAdded = function () {
+    // magic -- settng an empty div's innerHTML to the empty string
+    // keeps it from collapsing.  Apparently innerHTML must be set *after*
+    // adding the node to the DOM.
+    // Such a div is what IE 6 creates naturally when you make a blank line
+    // in a document of divs.  However, when copy-and-pasted the div will
+    // contain a space, so we note its emptiness with a property.
+    this.node.innerHTML = " "; // Frist we set a value that isnt blank
+    // a primitive-valued property survives copy-and-paste
+    Ace2Common.setAssoc(lineElem, "shouldBeEmpty", true);
+    // an object property doesn't
+    Ace2Common.setAssoc(lineElem, "unpasted", {});
+    this.node.innerHTML = ""; // Then we make it blank..  New line and no space = Awesome :)
+  }
+
+  this.appendSpan = function (txt, cls) {
+    if ((!txt) && cls) {
+      // gain a whole-line style (currently to show insertion point in CSS)
+      this.lineClass = domline.addToLineClass(lineClass, cls);
+    }
+    // otherwise, ignore appendSpan, this is an empty line
+  }
+
+  this.clearSpans = function () {
+    this.lineClass = ''; // non-null to cause update
+  }
+
+  this._writeClass = function () {
+    if (this.lineClass !== null) {
+      this.node.className = this.lineClass;
+    }
+  }
+
+  this.prepareForAdd = function () {
+    return this._writeClass;
+  }
+  this._finishUpdate = function () {
+    return this._writeClass;
+  }
+  this.getInnerHTML = function () {
+    return "";
+  }
+}).call(SpecialIEDOMLine.prototype);
+
+function createDomLine(nonEmpty, doesWrap, browser, document)
 {
-  return new DOMLine(nonEmpty, doesWrap, optBrowser, optDocument);
+  if (browser.msie && (!nonEmpty)) {
+    // TODO: Why is this necessary?
+    return new SpecialIEDOMLine(nonEmpty, doesWrap, browser, document);
+  } else {
+    return new DOMLine(nonEmpty, doesWrap, browser, document);
+  }
 };
 
 domline.processSpaces = function(s, doesWrap)