DevTools: [Elements] Implement shortcut-based node cut-copy-pasting

Source/devtools/front_end/main/Main.js

 /*
  * Copyright (C) 2006, 2007, 2008 Apple Inc.  All rights reserved.
  * Copyright (C) 2007 Matt Lilek (pewtermoose@gmail.com).
  * Copyright (C) 2009 Joseph Pecoraro
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
@@ skipping 515 matching lines @@
                 event.consume(true);
                 return;
             }
         }
 
         WebInspector.shortcutRegistry.handleShortcut(event);
     },
 
     _documentCanCopy: function(event)
     {
-        if (WebInspector.inspectorView.currentPanel() && WebInspector.inspectorView.currentPanel()["handleCopyEvent"])
+        var panel = WebInspector.inspectorView.currentPanel();
+        if (panel && panel["handleCopyEvent"])
             event.preventDefault();
     },
 
     _documentCopy: function(event)
     {
-        if (WebInspector.inspectorView.currentPanel() && WebInspector.inspectorView.currentPanel()["handleCopyEvent"])
-            WebInspector.inspectorView.currentPanel()["handleCopyEvent"](event);
+        var panel = WebInspector.inspectorView.currentPanel();
+        if (panel && panel["handleCopyEvent"])
+            panel["handleCopyEvent"](event);
+    },
+
+    _documentCut: function(event)
+    {
+        var panel = WebInspector.inspectorView.currentPanel();
+        if (panel && panel["handleCutEvent"])
+            panel["handleCutEvent"](event);
+    },
+
+    _documentPaste: function(event)
+    {
+        var panel = WebInspector.inspectorView.currentPanel();
+        if (panel && panel["handlePasteEvent"])
+            panel["handlePasteEvent"](event);
     },
 
     _contextMenuEventFired: function(event)
     {
         if (event.handled || event.target.classList.contains("popup-glasspane"))
             event.preventDefault();
     },
 
     _addMainEventListeners: function(doc)
     {
         doc.addEventListener("keydown", this._postDocumentKeyDown.bind(this), false);
         doc.addEventListener("beforecopy", this._documentCanCopy.bind(this), true);
         doc.addEventListener("copy", this._documentCopy.bind(this), false);
+        doc.addEventListener("cut", this._documentCut.bind(this), false);
+        doc.addEventListener("paste", this._documentPaste.bind(this), false);
         doc.addEventListener("contextmenu", this._contextMenuEventFired.bind(this), true);
         doc.addEventListener("click", this._documentClick.bind(this), false);
     },
 
     /**
      * @override
      * @param {!RuntimeAgent.RemoteObject} payload
      * @param {!Object=} hints
      */
     inspect: function(payload, hints)
@@ skipping 377 matching lines @@
     },
 
     /**
      * @param {!WebInspector.Event} event
      */
     _inspectNode: function(event)
     {
         WebInspector.Revealer.reveal(/** @type {!WebInspector.DOMNode} */ (event.data));
     }
 }