I updated your ice plugin to the best of my ability for TinyMCE v 4

Gruntfile.js

@@ -84,12 +84,12 @@ module.exports = function(grunt) {
       },
       tinyice: {
         files: {
-          'dist/ice_editor_plugin.js': 'lib/tinymce/jscripts/tiny_mce/plugins/ice/editor_plugin.js'
+          'dist/ice_editor_plugin.js': 'lib/tinymce/js/tinymce/plugins/ice/plugin.min.js'
         }
       },
       tinysr: {
         files: {
-          'dist/sr_editor_plugin.js': 'lib/tinymce/jscripts/tiny_mce/plugins/icesearchreplace/editor_plugin.js'
+          'dist/sr_editor_plugin.js': 'lib/tinymce/js/tinymce/plugins/icesearchreplace/plugin.min.js'
         }
       }
     },
@@ -139,7 +139,7 @@ module.exports = function(grunt) {
   });
 
   var cpTinyDir = function(dir) {
-    grunt.file.recurse('lib/tinymce/jscripts/tiny_mce/plugins/' + dir + '/', function(abspath, rootdir, subdir, filename) {
+    grunt.file.recurse('lib/tinymce/js/tinymce/plugins/' + dir + '/', function(abspath, rootdir, subdir, filename) {
       grunt.file.copy(rootdir + '/' + (subdir ? subdir + '/' : '') + filename,'dist/tinymce/plugins/' + dir + '/' + (subdir ? subdir + '/' : '') + '/' + filename);
     });
   };

demo/ice/bookmark.js

@@ -0,0 +1,166 @@
+(function() {
+
+  var exports = this, Bookmark;
+
+  Bookmark = function(env, range, keepOldBookmarks) {
+
+    this.env = env;
+    this.element = env.element;
+    this.selection = this.env.selection;
+
+    // Remove all bookmarks?
+    if (!keepOldBookmarks) {
+      this.removeBookmarks(this.element);
+    }
+
+    var currRange = range || this.selection.getRangeAt(0);
+    range = currRange.cloneRange();
+    var startContainer = range.startContainer;
+    var endContainer = range.endContainer;
+    var startOffset  = range.startOffset;
+    var endOffset = range.endOffset;
+    var tmp;
+
+    // Collapse to the end of range.
+    range.collapse(false);
+
+    var endBookmark  = this.env.document.createElement('span');
+    endBookmark.style.display = 'none';
+    ice.dom.setHtml(endBookmark, ' ');
+    ice.dom.addClass(endBookmark, 'iceBookmark iceBookmark_end');
+    endBookmark.setAttribute('iceBookmark', 'end');
+    range.insertNode(endBookmark);
+    if(!ice.dom.isChildOf(endBookmark, this.element)) {
+      this.element.appendChild(endBookmark);
+    }
+
+    // Move the range to where it was before.
+    range.setStart(startContainer, startOffset);
+    range.collapse(true);
+
+    // Create the start bookmark.
+    var startBookmark = this.env.document.createElement('span');
+    startBookmark.style.display = 'none';
+    ice.dom.addClass(startBookmark, 'iceBookmark iceBookmark_start');
+    ice.dom.setHtml(startBookmark, ' ');
+    startBookmark.setAttribute('iceBookmark', 'start');
+    try {
+      range.insertNode(startBookmark);
+
+      // Make sure start and end are in correct position.
+      if (startBookmark.previousSibling === endBookmark) {
+        // Reverse..
+        tmp  = startBookmark;
+        startBookmark = endBookmark;
+        endBookmark = tmp;
+      }
+    } catch (e) {
+      // NS_ERROR_UNEXPECTED: I believe this is a Firefox bug.
+      // It seems like if the range is collapsed and the text node is empty
+      // (i.e. length = 0) then Firefox tries to split the node for no reason and fails...
+      ice.dom.insertBefore(endBookmark, startBookmark);
+    }
+
+    if (ice.dom.isChildOf(startBookmark, this.element) === false) {
+      if (this.element.firstChild) {
+        ice.dom.insertBefore(this.element.firstChild, startBookmark);
+      } else {
+        // Should not happen...
+        this.element.appendChild(startBookmark);
+      }
+    }
+
+    if (!endBookmark.previousSibling) {
+      tmp = this.env.document.createTextNode('');
+      ice.dom.insertBefore(endBookmark, tmp);
+    }
+
+    // The original range object must be changed.
+    if (!startBookmark.nextSibling) {
+      tmp = this.env.document.createTextNode('');
+      ice.dom.insertAfter(startBookmark, tmp);
+    }
+
+    currRange.setStart(startBookmark.nextSibling, 0);
+    currRange.setEnd(endBookmark.previousSibling, (endBookmark.previousSibling.length || 0));
+
+    this.start = startBookmark;
+    this.end = endBookmark;
+  };
+
+  Bookmark.prototype = {
+
+    selectBookmark: function() {
+      var range = this.selection.getRangeAt(0);
+      var startPos = null;
+      var endPos = null;
+      var startOffset = 0;
+      var endOffset = null;
+      if (this.start.nextSibling === this.end || ice.dom.getElementsBetween(this.start, this.end).length === 0) {
+        // Bookmark is collapsed.
+        if (this.end.nextSibling) {
+          startPos = ice.dom.getFirstChild(this.end.nextSibling);
+        } else if (this.start.previousSibling) {
+          startPos = ice.dom.getFirstChild(this.start.previousSibling);
+          if (startPos.nodeType === ice.dom.TEXT_NODE) {
+            startOffset = startPos.length;
+          }
+        } else {
+          // Create a text node in parent.
+          this.end.parentNode.appendChild(this.env.document.createTextNode(''));
+          startPos = ice.dom.getFirstChild(this.end.nextSibling);
+        }
+      } else {
+        if (this.start.nextSibling) {
+          startPos = ice.dom.getFirstChild(this.start.nextSibling);
+        } else {
+          if (!this.start.previousSibling) {
+            var tmp = this.env.document.createTextNode('');
+            ice.dom.insertBefore(this.start, tmp);
+          }
+
+          startPos = ice.dom.getLastChild(this.start.previousSibling);
+          startOffset = startPos.length;
+        }
+
+        if (this.end.previousSibling) {
+          endPos = ice.dom.getLastChild(this.end.previousSibling);
+        } else {
+          endPos = ice.dom.getFirstChild(this.end.nextSibling || this.end);
+          endOffset = 0;
+        }
+      }
+
+      ice.dom.remove([this.start, this.end]);
+
+      if (endPos === null) {
+        range.setEnd(startPos, startOffset);
+        range.collapse(false);
+      } else {
+        range.setStart(startPos, startOffset);
+        if (endOffset === null) {
+          endOffset = (endPos.length || 0);
+        }
+        range.setEnd(endPos, endOffset);
+      }
+
+      try {
+        this.selection.addRange(range);
+      } catch (e) {
+        // IE may throw exception for hidden elements..
+      }
+    },
+
+    getBookmark: function(parent, type) {
+      var elem = ice.dom.getClass('iceBookmark_' + type, parent)[0];
+      return elem;
+    },
+
+    removeBookmarks: function(elem) {
+      ice.dom.remove(ice.dom.getClass('iceBookmark', elem, 'span'));
+    }
+  };
+
+  exports.Bookmark = Bookmark;
+
+}).call(this.ice);